CN111744317A - Filtering and purifying device for treating mercury-containing industrial waste gas - Google Patents
Filtering and purifying device for treating mercury-containing industrial waste gas Download PDFInfo
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- CN111744317A CN111744317A CN202010667039.4A CN202010667039A CN111744317A CN 111744317 A CN111744317 A CN 111744317A CN 202010667039 A CN202010667039 A CN 202010667039A CN 111744317 A CN111744317 A CN 111744317A
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 181
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 178
- 238000001914 filtration Methods 0.000 title claims abstract description 94
- 239000007789 gas Substances 0.000 title claims abstract description 82
- 239000002440 industrial waste Substances 0.000 title claims abstract description 58
- 238000001816 cooling Methods 0.000 claims abstract description 145
- 230000007246 mechanism Effects 0.000 claims abstract description 84
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000000460 chlorine Substances 0.000 claims abstract description 58
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims description 100
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 66
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 63
- 238000005507 spraying Methods 0.000 claims description 52
- 239000000110 cooling liquid Substances 0.000 claims description 43
- 239000007788 liquid Substances 0.000 claims description 41
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 30
- 229910052802 copper Inorganic materials 0.000 claims description 30
- 239000010949 copper Substances 0.000 claims description 30
- 239000012528 membrane Substances 0.000 claims description 25
- 238000000746 purification Methods 0.000 claims description 25
- 239000007864 aqueous solution Substances 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 6
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 5
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 4
- 239000007844 bleaching agent Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000010813 municipal solid waste Substances 0.000 claims description 4
- 239000012286 potassium permanganate Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 abstract description 45
- 238000000034 method Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 7
- 238000003723 Smelting Methods 0.000 abstract description 5
- 238000005065 mining Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 17
- 238000009833 condensation Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 8
- 239000012535 impurity Substances 0.000 description 7
- 239000002826 coolant Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 229940008718 metallic mercury Drugs 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001573 beryllium compounds Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910001902 chlorine oxide Inorganic materials 0.000 description 1
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003090 exacerbative effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- LWJROJCJINYWOX-UHFFFAOYSA-L mercury dichloride Chemical compound Cl[Hg]Cl LWJROJCJINYWOX-UHFFFAOYSA-L 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a filtering and purifying device for treating mercury-containing industrial waste gas, which is used for filtering, purifying and separating high-temperature mercury-containing industrial waste gas generated in the processes of smelting, mining, chemical industry and other industrial production, and comprises a cooling tank, a filtering tank, a mercury removing box, a purifying box and a subsequent processing tank, wherein the cooling tank is arranged above the filtering tank, the purifying box is connected above the subsequent processing tank, the mercury removing box is arranged on the purifying box through an installation sheet and is communicated with the filtering tank through an exhaust pipe, and an air inlet of the purifying box is communicated with the mercury removing box through a communicating pipe; a cooling mechanism is arranged in the cooling tank, a filtering mechanism is arranged in the filtering tank, a gas adding mechanism for adding chlorine and removing mercury and an aggravation mechanism for improving the reaction degree are arranged in the mercury removing box, and activated carbon particles are stored in the mercury removing box; the invention adopts various mercury removal technical means, can greatly improve the efficiency and effect of removing mercury from the waste gas, and can obviously reduce the content of mercury in the waste gas.
Description
Technical Field
The invention relates to the technical field of industrial waste gas treatment, in particular to a filtering and purifying device for treating mercury-containing industrial waste gas.
Background
Industrial waste gas is a generic term for various pollutant-containing gases discharged into the air during the combustion and production processes of fuels in the factory area of an enterprise. These exhaust gases are: carbon dioxide, carbon disulfide, hydrogen sulfide, fluorides, nitrogen oxides, chlorine, hydrogen chloride, carbon monoxide, lead mercury (mist) sulfate, beryllium compounds, smoke dust and productive dust, which are discharged into the atmosphere and pollute the air. The substances enter human bodies through different paths of respiratory tracts, some substances directly cause harm, and some substances have an accumulation effect and can seriously harm the health of people. The main cause of mercury-containing waste gas pollution is human activities, which mainly come from:
1. mining production of mercury-containing minerals and smelting process thereof in a smelting plant;
2. during the production, transportation and use of organic and inorganic compounds of mercury and the like;
3. when a chlor-alkali plant produces high-quality caustic soda, mercury-containing hydrogen generated by a mercury decomposer and mercury-containing waste gas generated by a tank;
4. a bell mill and paper making in gold-plating operation.
In the existing technology for treating mercury-containing waste gas, for example, a mercury-containing waste gas cooling device disclosed in chinese patent publication No. CN205700020U, is used to solve the problem that in a designed low-temperature soil-pyrolysis mercury removal system with less damage to soil, a large amount of water vapor is generated while mercury is converted into a gaseous state after soil pyrolysis, which greatly affects subsequent mercury-containing gas purification. But the device is only suitable for the field of soil mercury pollution treatment.
As another example, the method disclosed in chinese patent publication No. CN105854549A is a method for treating mercury-containing waste gas, which treats mercury-containing waste gas by a mercury-containing waste gas treatment method, so that the mercury content of the treated air is greatly reduced, and the treated air meets the national emission standard, but the treatment method has a complicated process, and is not beneficial to popularization and application;
for example, chinese patent publication No. CN107261811A discloses a filtering and purifying apparatus for treating mercury-containing industrial waste gas, which uses chlorine-filled activated carbon adsorption method to treat the surface of activated carbon with chlorine in advance, so that HgCl2 generated by the reaction between mercury and chlorine is attached to and stays on the surface of activated carbon, and the reaction degree of mercury-containing waste gas and chlorine is not easy to aggravate, resulting in low reaction efficiency, and thus leading to still more mercury content in the discharged waste gas.
Therefore, it is necessary to develop and provide a filtering and purifying device for treating mercury-containing industrial waste gas to solve the technical problems of poor treatment effect of mercury element in mercury-containing industrial waste gas and difficult separation of gas impurities.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a filtering and purifying device for treating mercury-containing industrial waste gas, which is used for filtering, purifying and separating high-temperature mercury-containing industrial waste gas generated in the processes of smelting industry, mining industry, chemical industry and other industrial production and comprises a cooling tank, a filtering tank, a mercury removing box, a purifying box and a subsequent processing tank, wherein the cooling tank is arranged above the filtering tank, the purifying box is connected above the subsequent processing tank, the mercury removing box is arranged on the purifying box through an installation sheet and is communicated with the filtering tank through an exhaust pipe, and an air inlet of the purifying box is communicated with the mercury removing box through a communicating pipe; a cooling mechanism is arranged in the cooling tank, a filtering mechanism is arranged in the filtering tank, a gas adding mechanism for adding chlorine and removing mercury and an aggravation mechanism for improving the reaction degree are arranged in the mercury removing box, and activated carbon particles are stored in the mercury removing box; the invention adopts various mercury removal technical means, can greatly improve the efficiency and effect of removing mercury from the waste gas, and can obviously reduce the content of mercury in the waste gas.
The purpose of the invention is realized by the following technical scheme:
a filtering and purifying device for treating industrial waste gas containing mercury comprises a cooling tank, a filtering tank, a mercury removing box, a purifying box and a subsequent treatment tank, wherein the filtering tank and the subsequent treatment tank are fixedly arranged on a support frame;
a cooling mechanism is arranged in the cooling tank, a filtering mechanism is arranged in the filtering tank, a gas adding mechanism for adding chlorine and removing mercury and an aggravation mechanism for improving the reaction degree are arranged in the mercury removing box, and activated carbon particles are stored in the mercury removing box; a cofferdam separation mechanism is arranged in the purifying box;
the filter mechanism comprises an installation plate frame, filter meshes and a communicating pipe, the installation plate frame is fixedly embedded in the filter tank, a plurality of annularly arranged arc embedding grooves are formed in the installation plate frame, the filter meshes extending inwards are embedded in each arc embedding groove, a plurality of micropores are formed in each filter mesh, the communicating pipe is arranged above the filter tank, the lower end of the communicating pipe penetrates through the top plate of the filter tank and extends to the central position of the installation plate frame, and the side wall of the filter tank is connected with an exhaust pipe;
the cooling mechanism comprises a cooling pipe and a spiral copper pipe, wherein the top end of the cooling pipe is provided with a water inlet pipe head penetrating through the top of the cooling tank, the lower part of the cooling pipe is provided with a water outlet pipe head, and cooling liquid for cooling enters the cooling pipe through the water inlet pipe head and is discharged out of the cooling pipe through the water outlet pipe head; the both ends of spiral copper pipe are inlet connection pipe and the connecting pipe of giving vent to anger respectively, inlet connection pipe is located the upper end of spiral copper pipe and upwards runs through the top of cooling jar, the connecting pipe of giving vent to anger is located the lower extreme of spiral copper pipe and downwards runs through the bottom of cooling jar, and the connecting pipe of giving vent to anger is connected with the upper end of communicating pipe, the outer wall at the cooling tube is established to spiral copper pipe winding cover, contain mercury industrial waste gas and get into spiral copper pipe through inlet connection pipe, and through the connecting pipe spiral.
After the temperature is reduced, waste gas enters the mounting plate rack through the communicating pipe, the waste gas after gathering is subjected to explosive diffusion and is filtered through the filter screen, and the filter screen extends along the arc-shaped embedded groove, so that the arc surface in the mounting plate rack is of a concave-convex structure, the contact area of the filter screen and the waste gas is larger, and the filtering efficiency of the filter screen is improved.
The filtering and purifying device for treating the mercury-containing industrial waste gas further comprises a pretreatment device, the mercury-containing industrial waste gas enters the cooling tank after being treated by the pretreatment device, the pretreatment device comprises a spraying box, a spraying box air inlet pipe is arranged on one side of the spraying box, a spraying box air outlet pipe is arranged at the top end of the other side of the spraying box, the high-temperature mercury-containing industrial waste gas enters the spraying box through the spraying box air inlet pipe and is discharged out of the spraying box through the spraying box air outlet pipe, and the spraying box air outlet pipe is communicated with an air inlet connecting pipe above the cooling tank;
still be equipped with cooling mechanism wet return and cooling mechanism inlet tube in one side of spray tank, cooling mechanism wet return sets up in the top of spray tank lateral wall, and the cooling mechanism inlet tube sets up in the below of spray tank lateral wall, and the inlet tube head of cooling pipe top and the cooling mechanism inlet tube intercommunication that spray tank lateral wall below set up, the drainage tube head of cooling pipe below and the cooling mechanism wet return intercommunication that spray tank lateral wall top set up.
Furthermore, a refrigerator is arranged at the port of the cooling mechanism return pipe, the refrigerator is fixedly arranged on the side wall of the spray box, cooling liquid discharged from the water discharge pipe head can be cooled through the refrigerator, a spray pipe is arranged above the inner part of the spray box, a plurality of spray heads are arranged on the spray pipe, the spray pipe is arranged above the spray box air inlet pipe and below the spray box air outlet pipe, one end of the spray pipe penetrates through the side wall of the spray box and is connected with the refrigerator, and water liquid in the cooling mechanism return pipe can be sprayed out from the spray heads on the spray pipe after passing through the refrigerator;
the port of the cooling mechanism water inlet pipe is provided with a water suction pump, the water suction pump is fixedly installed on the side wall of the spraying box, and cooling liquid in the spraying box can be pumped into the cooling mechanism water inlet pipe and the cooling pipe through the water suction pump.
Furthermore, a liquid inlet pipe and a liquid outlet pipe are also arranged on the side wall of the spraying box, the liquid inlet pipe is arranged above the side wall of the spraying box and is positioned above the air inlet pipe of the spraying box, the liquid outlet pipe is arranged below the side wall of the spraying box, cooling liquid is added into the spraying box through the liquid inlet pipe, the highest position of the liquid level of the added cooling liquid in the spraying box is positioned below the air inlet pipe of the spraying box, and control valves are arranged on the liquid inlet pipe and the liquid outlet pipe;
the cooling liquid is mercury absorption cooling liquid.
Preferably, the mercury absorption cooling liquid is: aqueous potassium permanganate solution, aqueous bleaching powder solution, or aqueous sodium hypochlorite solution.
The gas filling mechanism comprises a chlorine filling pipe, a first ring pipe and a second ring pipe, the chlorine filling pipe is fixedly mounted on the mercury removing box and extends into the mercury removing box in a penetrating mode, the first ring pipe is fixedly mounted in the upper box body of the mercury removing box through a pipe support, a plurality of exhaust nozzles distributed in an annular mode are formed in the pipe surface, close to the inner side of the bottom, of the first ring pipe, the second ring pipe is fixedly mounted in the lower box body of the mercury removing box through the pipe support, a plurality of exhaust nozzles distributed in an annular mode are formed in the pipe surface, close to the inner side of the top, of the second ring pipe, gas inlets in the first ring pipe and the second ring pipe are communicated with the chlorine filling pipe respectively, the other end of the chlorine filling pipe is connected with a chlorine tank through an exhaust valve, and the chlorine tank is fixedly mounted on the mercury removing box through a chlorine tank support.
The waste gas after filtering enters into back behind the mercury removing box through the blast pipe, the chlorine gas jar that will be used for storing chlorine passes through the pipe and is connected with notes chlorine pipe, open the valve and add chlorine to removing the mercury box, and chlorine carries out the formula of spouting interpolation through first ring canal and second ring canal, because first ring canal is close to the exhaust nozzle who offers a plurality of annular distribution on the pipe surface of bottom inboard, and the second ring canal is close to and has offered the exhaust nozzle that a plurality of annular distributes on the pipe surface of top inboard, consequently, the processing of chlorine to activated carbon particle surface has been strengthened.
Further, the aforesaid is handled mercury industrial waste gas's filtration purification device, the aggravation mechanism includes driving motor, U type agitator and puddler, driving motor fixed mounting is in the bottom of removing the mercury tank, and driving motor's output extends to and has U type agitator in removing the mercury tank and fixed mounting, fixed mounting has many puddlers on the U type agitator, the aggravation mechanism is used for stirring the active carbon granule that removes the interior storage of mercury tank.
As the preferred scheme, the filtering tank is communicated with the mercury removing box through an exhaust pipe connected with the side wall of the filtering tank, the exhaust pipe extends to a pipe opening inside the mercury removing box and is provided with a flow dividing pipe, the flow dividing pipe is arranged in a region between a first annular pipe and a second annular pipe inside the mercury removing box, and a plurality of air holes are formed in the outer pipe wall of the flow dividing pipe.
Further, cofferdam separating mechanism includes hollow plate, filtration membrane and connecting plate in the arc, and the below of hollow plate is equipped with a plurality of layers of filtration membrane in the arc, separates through the connecting plate of installing a plurality of annular distribution between the filtration membrane of upper and lower adjacent layer, and the space between adjacent filtration membrane and the left and right sides constitutes the air discharge flow way, has seted up a plurality of air inlet capacity way in the relative both sides of hollow plate in the arc, the outer edge of hollow plate is inboard at the roof of purifying box through many erection columns connection in the arc.
Furthermore, the bottom of the purifying box is provided with an exhaust end, the top end of the subsequent treatment tank is provided with a subsequent treatment tank air inlet pipe, the upper end of the subsequent treatment tank air inlet pipe is connected with the exhaust end at the bottom of the purifying box, the subsequent treatment tank is stored with sodium hydroxide aqueous solution, the lower end of the air inlet pipe of the subsequent treatment tank penetrates through the top plate of the subsequent treatment tank and extends to the position of the inner cavity of the subsequent treatment tank, which is close to the bottom end, the lower end of the air inlet pipe of the subsequent treatment tank is immersed in the sodium hydroxide aqueous solution, the air flow exhausted from the exhaust end at the bottom of the purification box is flushed into the sodium hydroxide aqueous solution through the air inlet pipe of the subsequent treatment tank, and a clean exhaust pipe is arranged above the side wall of the subsequent treatment tank, the clean exhaust pipe is arranged above the highest liquid level far away from the sodium hydroxide aqueous solution, and the air flow emerging from the upper part of the liquid level of the sodium hydroxide aqueous solution is exhausted from the clean exhaust pipe arranged above the side wall of the subsequent treatment tank.
The sodium hydroxide solution effectively treats the residual chlorine gas, and the residual chlorine gas is prevented from being discharged back to the air.
According to the filtering and purifying device for treating the mercury-containing industrial waste gas, the spray head is arranged at the lower end of the air inlet pipe of the subsequent treatment tank; a waste discharge pipe is arranged at the bottom of the subsequent treatment tank, and a control valve is arranged on the waste discharge pipe;
the bottom of the filtering tank is provided with a trash discharging valve;
the cooling pipe is fixedly arranged in the cooling tank through a pipe clamp;
a filter screen is arranged on the inner port of the cooling mechanism water inlet pipe extending into the spraying box.
The invention has the beneficial effects that:
1. according to the invention, the cooling mechanism in the cooling tank is used for cooling the high-temperature mercury-containing industrial waste gas, so that the problem that the subsequent equipment is damaged due to overhigh temperature of the waste gas can be prevented, meanwhile, mercury in a part of the waste gas can be separated out in the cooling condensation process, the cooled waste gas is treated by the filtering mechanism in the filtering tank, and the filtering net piece extends along the arc-shaped embedded groove, so that the inner arc surface of the mounting plate frame is of a concave-convex structure, the contact area between the filtering net piece and the waste gas is larger, and the filtering efficiency of the filtering net piece is improved;
2. according to the invention, as the pipe surface of the first ring pipe close to the inner side of the bottom is provided with the plurality of exhaust nozzles distributed annularly, and the pipe surface of the second ring pipe close to the inner side of the top is provided with the plurality of exhaust nozzles distributed annularly, the treatment of chlorine on the surfaces of the activated carbon particles is enhanced, the driving motor is started to drive the stirring rod on the U-shaped stirring frame, the comprehensiveness of the chlorine on the treatment of the chlorine on the surfaces of the activated carbon particles is improved, the reaction efficiency and the reaction degree of mercury in the mercury-containing waste gas and the chlorine are enhanced, and the efficiency and the effect of removing mercury in the waste gas can be greatly improved.
3. The invention is provided with a pretreatment device, a subsequent treatment tank and other various mercury removal technical means, and can obviously reduce the content of mercury in the waste gas.
Drawings
FIG. 1 is a schematic structural diagram of a filtering and purifying device for treating industrial waste gas containing mercury according to the present invention;
FIG. 2 is a schematic structural diagram of a cooling mechanism in the cooling tank shown in FIG. 1;
FIG. 3 is a schematic view of a pretreatment apparatus
FIG. 4 is a schematic structural view of the filter mechanism of FIG. 1;
FIG. 5 is a schematic illustration in partial cross-section of the filter mechanism of FIG. 4;
FIG. 6 is a schematic view of the structure inside the mercury removing tank shown in FIG. 1;
FIG. 7 is a schematic view of the internal weir separation mechanism of the purification box of FIG. 1;
FIG. 8 is a schematic view of the structure of a post-treatment tank
Reference numbers in the figures: 1. a cooling tank; 2. a filter tank; 3. a mercury removing box; 4. a purification box; 5. a support frame; 6. a cooling mechanism; 61. a cooling tube; 62. an air inlet connecting pipe; 63. a spiral copper pipe; 64. a drain pipe head; 65. a water inlet pipe head; 66. an air outlet connecting pipe; 7. a filtering mechanism; 71. installing a tray frame; 72. an arc-shaped embedding groove; 73. a filter mesh sheet; 74. micropores; 75. a trash valve; 76. a communicating pipe; 8. an exhaust pipe; 9. a shunt tube; 9a, a gas filling mechanism; 91a, a chlorine injection pipe; 92a, a first ring pipe; 93a, a second ring pipe; 9b, an exacerbating mechanism; 91b, a drive motor; 92b, a U-shaped stirring frame; 93b, a stirring rod; 9c, mounting pieces; 9d, a cofferdam separating mechanism; 91d, arc-shaped hollow plates; 92d, a filter membrane; 93d, a connecting plate; 94d, an air inlet channel; 95d, an exhaust flow passage; 9e, mounting the column; 9f, a communicating pipe; 9g, a chlorine tank; 9h, a subsequent treatment tank; 10. a spray box; 11. a shower pipe; 12. a shower head; 13. a water pump; 14. a refrigerator; 15. a cooling mechanism water return pipe; 16. a cooling mechanism water inlet pipe; 17. a spray box air inlet pipe; 18. an air outlet pipe of the spray box; 19. a liquid inlet pipe; 20. a liquid discharge pipe; 21. a filter screen; 22. cleaning the exhaust pipe; 23. a gas inlet pipe of the subsequent treatment tank; 24. a waste discharge pipe; 25. aqueous sodium hydroxide solution.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
Referring to fig. 1 to 8, the present invention provides a filtering and purifying apparatus for processing mercury-containing industrial waste gas, which is used for filtering, purifying and separating high-temperature mercury-containing industrial waste gas generated in the processes of smelting, mining, chemical industry and other industries, and comprises: cooling tank 1, filter tank 2, remove mercury case 3, purifying box 4 and follow-up processing jar 9h, filter tank 2 and follow-up processing jar 9h all fix the mount and establish on support frame 5, and the top at filter tank 2 is established to cooling tank 1 mount, purifying box 4 is connected in follow-up processing jar 9h top, purifying box 4's upper surface removes mercury case 3 through installation piece 9c fixed mounting, it communicates with the blast pipe of filter tank 2 through blast pipe 8 to remove mercury case 3, purifying box 4's air inlet is through communicating pipe 9f and the gas vent fixed connection who removes mercury case 3, and purifying box 4's bottom is through exhaust end and follow-up processing jar 9h intercommunication.
In the specific implementation process, as shown in fig. 1 to 2, a cooling mechanism 6 for reducing the temperature of the mercury-containing industrial waste gas is installed in the cooling tank 1, the cooling mechanism 6 includes a cooling pipe 61 and a spiral copper pipe 63, the cooling pipe 61 is fixedly installed in the cooling tank 1 through a pipe clamp, a water inlet pipe head 65 penetrating through the top of the cooling tank 1 is arranged at the top end of the cooling pipe 61, a water discharge pipe head 64 is arranged at the lower part of the cooling pipe 61, and cooling liquid for cooling enters and exits the cooling pipe 61 through the water inlet pipe head 65 and the water discharge pipe head 64. The both ends of spiral copper pipe 63 are intake connecting pipe 62 and the connecting pipe 66 of giving vent to anger respectively, and intake connecting pipe 62 is located the upper end of spiral copper pipe 63 and upwards runs through the top of cooling jar 1, and the connecting pipe 66 of giving vent to anger is located the lower extreme of spiral copper pipe 63 and downwards runs through the bottom of cooling jar 1, and the connecting pipe 66 of giving vent to anger is connected with communicating pipe 76 in the filter jar 2. The spiral copper pipe 63 is wound on the outer wall of the cooling pipe 61. The temperature of the mercury-containing industrial waste gas is generally higher, in the purification process of filtration and separation, condensation needs to be carried out on the mercury-containing industrial waste gas, the high-temperature mercury-containing industrial waste gas enters the spiral copper pipe 63 through the air inlet connecting pipe 62, the spiral copper pipe 63 is in close winding contact with the outer wall of the cooling pipe 61, the cooling liquid enters the cooling pipe 61 through the water inlet pipe head 65 at the top of the cooling pipe 61, the peripheral wall of the cooling pipe 61 is cooled, the high temperature of the mercury-containing industrial waste gas in the replaced spiral copper pipe 63 is taken away through the cooling liquid in the cooling pipe 61, and therefore the technical effect of cooling and condensing the mercury-containing industrial waste gas is achieved. The heat-exchanged coolant is discharged from the cooling pipe 61 through the drain pipe head 64 at the lower portion of the cooling pipe 61.
It should be noted that, the mercury in a part of industrial waste gas can also be separated out in the cooling condensation process, and as a separation mode for removing mercury and avoiding the damage of the high-temperature air flow to the subsequent filtering and purifying device, in this embodiment, a pretreatment device for high-temperature mercury-containing industrial waste gas is further provided, so as to further improve the cooling condensation effect on the high-temperature mercury-containing industrial waste gas. As shown in fig. 4, the pretreatment device includes a spray box 10, a spray box inlet pipe 17 is disposed in the middle of the left side of the spray box 10, a spray box outlet pipe 18 is disposed at the top end of the right side of the spray box 10, and the high-temperature mercury-containing industrial waste gas enters the spray box 10 through the spray box inlet pipe 17 and is discharged out of the spray box 10 through the spray box outlet pipe 18. The spraying box air outlet pipe 18 is communicated with an air inlet connecting pipe 62 above the cooling tank 1, and waste gas exhausted from the spraying box 10 enters the spiral copper pipe 63 through the spraying box air outlet pipe 18 and the air inlet connecting pipe 62.
One side of the spray box 10 close to the cooling tank 1 is provided with a cooling mechanism water return pipe 15 and a cooling mechanism water inlet pipe 16, the cooling mechanism water return pipe 15 is arranged above the side wall of the spray box 10, and the cooling mechanism water inlet pipe 16 is arranged below the side wall of the spray box 10. The water inlet pipe head 65 above the cooling pipe 61 is communicated with the cooling mechanism water inlet pipe 16 arranged below the side wall of the spray box 10, and the water outlet pipe head 64 below the cooling pipe 61 is communicated with the cooling mechanism water return pipe 15 arranged above the side wall of the spray box 10. The cooling liquid discharged from the drain pipe head 64 below the cooling pipe 61 replaces the heat of the spiral copper pipe 63, so the temperature of the cooling liquid discharged from the drain pipe head 64 is relatively high, therefore, a refrigerator 14 is arranged at the port of the cooling mechanism return pipe 15, the refrigerator 14 is fixedly arranged on the side wall of the spray box 10, the cooling liquid discharged from the drain pipe head 64 can be cooled by the refrigerator 14, a shower pipe 11 is provided above the inside of the shower box 10, a plurality of shower pipes 11 are provided in common in the present embodiment, each spray pipe 11 is provided with a plurality of spray heads 12, the spray pipes 11 are arranged above the spray box air inlet pipe 17 and below the spray box air outlet pipe 18, one end of each spray pipe 11 penetrates through the side wall of the spray box 10 to be connected with the refrigerator 14, and water liquid in the cooling mechanism water return pipe 15 can be sprayed out from the spray heads 12 on the spray pipes 11 after passing through the refrigerator 14. In order to increase the spraying pressure of the spray header 12 and enhance the flow rate of the cooling liquid in the cooling pipe 61, the present embodiment further includes a water pump 13 at the port of the cooling mechanism inlet pipe 16, the water pump 13 is fixedly mounted on the side wall of the spray box 10, and the cooling liquid in the spray box 10 can be pumped into the cooling mechanism inlet pipe 16 and the cooling pipe 61 under pressure by the water pump 13. On the lateral wall of keeping away from cooling tank 1 at spray box 10, still install feed liquor pipe 19 and fluid-discharge tube 20, feed liquor pipe 19 is installed in the lateral wall top of spray box 10, and be located the top of spray box intake pipe 17, fluid-discharge tube 20 is installed in the lateral wall below of spray box 10, and highly unanimous basically with the inner chamber bottom surface of spray box 10, can add to spray box 10 through feed liquor pipe 19 and establish proper amount of coolant liquid, the highest position of its liquid level of the coolant liquid of settlement is in the below of spray box intake pipe 17 when the normality, need change it after the coolant liquid uses a period, during the change, through the fluid-discharge tube 20 that sets up in spray box below and discharge the coolant liquid. Control valves are arranged on the liquid inlet pipe 19 and the liquid outlet pipe 20 and are opened when needed.
When the spraying tank works, the control valve on the liquid inlet pipe 19 is opened firstly, a proper amount of cooling liquid is injected into the spraying tank 10 through the liquid inlet pipe 19, the highest position of the liquid level of the injected cooling liquid is positioned below the air inlet pipe 17 of the spraying tank, then the control valve on the liquid inlet pipe 19 is closed, and liquid injection is stopped. The cooling liquid is a mercury absorption cooling liquid prepared by adding a certain amount of liquid absorbent capable of absorbing metallic mercury into common water, the liquid absorbent capable of absorbing metallic mercury is potassium permanganate, bleaching powder or sodium hypochlorite, namely, the cooling liquid injected into the spraying box 10 is a mercury absorption cooling liquid, and the mercury absorption cooling liquid is specifically: the potassium permanganate aqueous solution, the bleaching powder aqueous solution or the sodium hypochlorite aqueous solution, of course, the cooling liquid injected into the spray box 10 may also be ordinary tap water. However, it is preferable to inject the cooling liquid for absorbing mercury into the spray box 10, so that the spray box 10 can simultaneously achieve various technical effects of condensation temperature reduction, condensation mercury removal and mercury removal by water solution adsorption for high-temperature industrial waste gas containing mercury. After the injection of the cooling liquid into the spray box 10 is completed, the water suction pump 13 is started, the cooling liquid in the spray box 10 is pumped into the cooling pipe 61 through the cooling mechanism water inlet pipe 16 and the water inlet pipe head 65, and is discharged out of the cooling pipe 61 through the water discharge pipe head 64, and the cooling liquid discharged from the cooling pipe 61 enters the spray pipe 11 through the cooling mechanism water return pipe 15 and the refrigerator 14, and is sprayed out downwards from the plurality of spray heads 12 arranged on the spray pipe 11.
The high-temperature mercury-containing industrial waste gas enters the lower part of the spray pipe 11 in the spray box 10 through the spray box air inlet pipe 17 positioned on the side wall of the spray box 10, the high-temperature mercury-containing industrial waste gas entering the spray box 10 is immediately cooled and separated and adsorbed by the cooling liquid sprayed by the plurality of spray heads 12, and the cooling liquid sprayed by the spray heads 12 is condensed by the refrigerator 14, so that the temperature of the cooling liquid is enough to cool the high-temperature mercury-containing industrial waste gas when sprayed by the spray heads 12, and the cooling liquid sprayed by the spray heads 12 has proper spray pressure because the water suction pump 13 is arranged, although the cooling liquid is high-temperature liquid discharged from the cooling pipe 61. The cooling liquid sprayed from the spray header 12 is collected at the bottom of the inner cavity of the spray box 10 and is pumped into the water inlet pipe head 65 and the cooling pipe 61 again through the water suction pump 13 and the cooling mechanism water inlet pipe 16. In the spraying process, the dust in the high-temperature mercury-containing industrial waste gas can be brought to the bottom of the spraying box 10 by the cooling liquid sprayed by the spraying head 12, and in order to prevent the impurities from entering the water suction pump 13 and the refrigerator 14 and blocking the spraying head 12, the filtering net 21 is further arranged on the inner port of the cooling mechanism water inlet pipe 16 extending into the spraying box 10 in the embodiment so as to prevent the impurities from entering the cooling mechanism water inlet pipe 16.
The high-temperature mercury-containing industrial waste gas entering the spray box 10 from the spray box air inlet pipe 17 is cooled by cooling liquid sprayed by the spray heads 12, condensed to remove mercury and absorbed by water solution to remove mercury, and then the high-temperature mercury-containing industrial waste gas is discharged from the spray box air outlet pipe 18 arranged at the upper right of the spray box 10 and enters the air inlet connecting pipe 62 arranged above the cooling tank 1 and enters the spiral copper pipe 63 through the air inlet connecting pipe 62 to be further condensed and cooled.
The mercury-containing industrial waste gas entering the spiral copper pipe 63 still has a high temperature, and at this time, the second condensation cooling is performed through the spiral copper pipe 63 wound layer by layer and the cooling pipe 61 tightly contacted with the spiral copper pipe 63, so as to further reduce the temperature of the mercury-containing industrial waste gas, and mercury in a part of the industrial waste gas is separated in a condensation manner. The industrial waste gas containing mercury after being cooled again by the spiral copper pipe 63 enters the communicating pipe 76 in the filter tank 2 through the air outlet connecting pipe 66 at the lower end of the spiral copper pipe 63.
Referring to fig. 1, 4 and 5, a filtering mechanism 7 for removing impurities from a part of mercury-containing industrial waste gas is installed in the filtering tank 2, the filtering mechanism 7 includes an installation tray frame 71, arc-shaped embedding grooves 72, filtering net sheets 73, micro-pores 74, an impurity discharge valve 75 and a communicating pipe 76, the installation tray frame 71 is fixedly embedded on the inner bottom wall of the filtering tank 2, the installation tray frame 71 is provided with a plurality of annularly-arranged and equidistantly-distributed arc-shaped embedding grooves 72, each arc-shaped embedding groove 72 is fixedly embedded with an internally-extending filtering net sheet 73, the filtering net sheets 73 are provided with a plurality of uniformly-distributed micro-pores 74, the communicating pipe 76 is fixedly installed on the filtering tank 2, one end of the communicating pipe 76 extends to the central position of the installation tray frame 71, the other end of the communicating pipe 76 penetrates through the bottom of the cooling tank 1 and is fixedly connected with an exhaust port formed at the bottom of the cooling pipe 61, the impurity discharge valve 75 is, and the connection pipe of the trash valve 75 extends into the mounting plate frame 71.
It should be noted that: the waste gas after cooling enters the installation plate rack 71 through the communicating pipe 76, the gathered waste gas is subjected to explosive diffusion and is filtered through the filter screen 73, the filter screen 73 extends along the arc-shaped embedding groove 72, so the arc surface in the installation plate rack 71 is of a concave-convex structure, the contact area between the filter screen 73 and the waste gas is larger, the filtering efficiency of the filter screen 73 is improved, the waste gas filtered by the filter screen 73 enters the cavity between the filter tank 2 and the installation plate rack 71, the sealing cover with a central large hole is embedded on the inner top wall of the installation plate rack 71, air is further driven to enter and exit the peripheral wall only, the peripheral wall of the filter tank 2 is provided with a through hole communicated with the exhaust pipe 8, and the annular cavity between the filter tank 2 and the installation plate rack 71 is communicated with the exhaust pipe 8.
Referring to fig. 1 and 6, a gas filling mechanism 9a for adding chlorine and removing mercury and a aggravation mechanism 9b for improving the reaction degree are installed in the mercury removing tank 3, the gas filling mechanism 9a includes a chlorine injection pipe 91a, a first ring pipe 92a and a second ring pipe 93a, the chlorine injection pipe 91a is fixedly installed on the mercury removing tank 3 and extends into the mercury removing tank 3, the first ring pipe 92a is fixedly installed in an upper tank of the mercury removing tank 3 through a pipe frame, a plurality of exhaust nozzles distributed annularly are opened on a pipe surface of the first ring pipe 92a near the inner side of the bottom, the second ring pipe 93a is fixedly installed in a lower tank of the mercury removing tank 3 through a pipe frame, a plurality of exhaust nozzles distributed annularly are opened on a pipe surface of the second ring pipe 93a near the inner side of the top, gas inlets on the first ring pipe 92a and the second ring pipe 93a are respectively communicated with the chlorine injection pipe 91a, an upper end of the chlorine injection pipe 91a is connected with a chlorine discharge valve 9g, chlorine cylinder 9g passes through support fixed mounting on going mercury tank 3, and aggravate mechanism 9b and include driving motor 91b, U type agitator 92b and puddler 93b, driving motor 91b fixed mounting is in the bottom of going mercury tank 3, and driving motor 91 b's output extends to and goes in mercury tank 3 and fixed mounting has U type agitator 92b, and U type agitator 92b is last fixed mounting has many puddlers 93b, and it still stores the activated carbon granule of capacity to go in the mercury tank 3.
It should be noted that: after filtered waste gas enters the mercury removing box 3 through the exhaust pipe 8, a chlorine tank 9g for storing chlorine is connected with a chlorine injection pipe 91a through a guide pipe, the valve is opened to add chlorine to the mercury removing box 3, and the chlorine is added in an injection mode through a first ring pipe 92a and a second ring pipe 93a, as the first ring pipe 92a is close to the pipe surface of the inner side of the bottom, a plurality of exhaust nozzles distributed in an annular mode are formed, the second ring pipe 93a is close to the pipe surface of the inner side of the top, a plurality of exhaust nozzles distributed in an annular mode are formed, the treatment of the chlorine on the surfaces of the activated carbon particles in the mercury removing box 3 is enhanced, the surfaces of the activated carbon particles fully adsorb the chlorine, and the activated carbon saturated with the chlorine can catalyze the chlorine in the mercury-containing waste gas to become mercury chloride. And the waste gas enters the mercury removing box 3 and then reacts with chlorine to generate HgCl2Adhere to and stop in the active carbon granule to mercury in the waste gas is detached in the absorption, it is rotatory to open puddler 93b that driving motor 91b drove on the U type stirring frame 92b, has not only improved the comprehensive nature of chlorine gas to active carbon granule surface treatment, has strengthened the reaction efficiency and the reaction degree of mercury in the mercury-containing waste gas with chlorine simultaneously, can promote waste gas by a wide margin and remove mercury's efficiency and effect, can show the content that reduces mercury in the waste gas.
As shown in fig. 1, the exhaust port formed in the peripheral wall of the filter canister 2 is communicated with the top of the mercury removing tank 3 through the exhaust pipe 8, the exhaust pipe 8 extends to the pipe opening inside the mercury removing tank 3 and is fixedly provided with a shunt pipe 9, the shunt pipe 9 is arranged in the area between the first ring pipe 92a and the second ring pipe 93a inside the mercury removing tank 3, and the outer pipe wall of the shunt pipe 9 is provided with a plurality of uniformly distributed air holes, so that the waste gas can be diffused explosively, and the reaction efficiency of the waste gas with the chlorine sprayed out of the first ring pipe 92a and the second ring pipe 93a is enhanced.
Referring to fig. 1 and 6, a cofferdam separation mechanism 9d for exhaust gas purification is installed in the purification box 4, and the upper surface of the purification box 4 is fixedly installed below the mercury removing box 3 by an installation piece 9c, the cofferdam separating mechanism 9d comprises an arc-shaped hollow plate 91d, a filtering membrane 92d and a connecting plate 93d, a plurality of layers of filtering membranes 92d arranged at equal intervals are distributed at the bottom of the arc-shaped hollow plate 91d, and a plurality of connecting plates 93d which are distributed annularly are arranged between the filtering membranes 92d of the upper and lower adjacent layers, the filtering membranes 92d of the upper and lower layers are connected and separated by connecting plates 93d, and the air exhaust flow passage 95d is formed by the gap between the upper and lower adjacent filtering membranes 92d and the left and right adjacent connecting plates 93d, a plurality of air inlet channels 94d are arranged on two opposite sides of the arc-shaped hollow plate 91d, and the outer edge of the arc-shaped hollow plate 91d is connected to the inner side of the top wall of the purifying box 4 through a plurality of mounting columns 9 e. The air inlet channels 94d are arranged on two opposite sides of the arc-shaped hollow plate 91d and are distributed in a diffusion manner from top to bottom, and the air inlet channels 94d and the air outlet channels 95d are alternately separated to form an arc-shaped filtering cofferdam.
It should be noted that: in the specific implementation process, the filtering membrane 92d is a permeable filtering membrane and adopts an arc divergence structure design, which increases the length of the membrane carrier and increases the contact area between the membrane and the waste gas, and improves the filtering effect on impurities and micro-dust in the waste gas, because the multi-layer filtering membrane 92d is fixed by the connecting plate 93d to form a framework, each filtering membrane 92d, the air inlet channel 94d and the exhaust channel 95d are separated at intervals to form an arc filtering cofferdam, the curved cofferdam intercepts fine particles and free moisture in the waste gas and decomposes the membrane, the intercepted particles are adhered and gathered along the air inlet channel 94d, the accumulated particles are more, the particles fall and are adsorbed on the filtering membrane 92d by the air inlet channel 94d under the action of gravity and membrane adsorption force, the waste gas after deep purification and adsorption treatment by the multi-layer filtering membrane 92d overflows along the cofferdam and enters the air inlet pipe 23 of the subsequent treatment tank along with the exhaust end arranged at the bottom of the purification tank 4, thereby entering the post-treatment tank 9 h.
In order to avoid the waste gas treated by the above procedures, the waste gas also contains residual chlorine, namely, the residual chlorine after the mercury-containing waste gas is chemically reacted and acted is prevented from being discharged back to the air, and the air is prevented from being polluted. The present embodimentIn, still be provided with the follow-up processing jar 9h that is used for handling residual chlorine at the bottom of purifying box 4, store in follow-up processing jar 9h an appropriate amount of sodium hydroxide aqueous solution 25, if still contain residual chlorine in the gas flow of gas stream after the processing of above-mentioned procedure, then residual chlorine in the gas flow can take place chemical reaction with sodium hydroxide aqueous solution 25, chlorine and sodium hydroxide reaction generate sodium chloride, sodium hypochlorite and water, the chemical equation of reaction is: cl2+2NaOH═NaCl+NaClO+H2And O, which can neutralize and decompose residual chlorine in the gas flow.
As shown in fig. 1 and 8, the post-treatment tank 9h is fixedly mounted on the support frame 5, a post-treatment tank air inlet pipe 23 is arranged at the top end of the post-treatment tank 9h, the upper end of the post-treatment tank air inlet pipe 23 is connected with the exhaust end at the bottom of the purification box 4, the lower end of the post-treatment tank air inlet pipe 23 penetrates through the top plate of the post-treatment tank 9h and extends to the position close to the bottom end of the inner cavity of the post-treatment tank 9h, the lower end of the post-treatment tank air inlet pipe 23 is immersed in the sodium hydroxide aqueous solution 25, a nozzle is arranged at the lower end of the post-treatment tank air inlet pipe 23, the air flow discharged from the exhaust end at the bottom of the purification box 4 completely rushes into the sodium hydroxide aqueous solution 25 through the post-treatment tank air inlet pipe 23, a sodium hydroxide exhaust pipe 22 is arranged above the right side wall of the post-treatment tank 9h, the sodium hydroxide exhaust And finally discharged from a clean discharge pipe 22 provided above the right side wall of the succeeding tank 9 h. The sodium hydroxide aqueous solution 25 used for a period of time needs to be replaced, so the embodiment is provided with the waste discharge pipe 24 at the bottom of the subsequent treatment tank 9h, the waste discharge pipe 24 is provided with a control valve, and when the sodium hydroxide aqueous solution waste liquid needs to be discharged, the control valve on the waste discharge pipe 24 is opened, so that the waste liquid in the subsequent treatment tank 9h can be discharged through the waste discharge pipe 24.
The foregoing is merely a preferred embodiment of the invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to limit the invention to other embodiments, and to various other combinations, modifications, and environments and may be modified within the scope of the inventive concept as expressed herein, by the teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a handle filtration purifier who contains mercury industrial waste gas which characterized in that: the device comprises a cooling tank (1), a filtering tank (2), a mercury removing box (3), a purifying box (4) and a subsequent treatment tank (9h), wherein the filtering tank (2) and the subsequent treatment tank (9h) are fixedly arranged on a support frame (5), the cooling tank (1) is arranged above the filtering tank (2), the purifying box (4) is connected above the subsequent treatment tank (9h), the mercury removing box (3) is installed on the purifying box (4) through an installation sheet (9c), the mercury removing box (3) is communicated with the filtering tank (2) through an exhaust pipe (8), and an air inlet of the purifying box (4) is communicated with the mercury removing box (3) through a communicating pipe (9 f);
a cooling mechanism (6) is arranged in the cooling tank (1), a filtering mechanism (7) is arranged in the filtering tank (2), a gas filling mechanism (9a) for adding chlorine and removing mercury and an aggravation mechanism (9b) for improving the reaction degree are arranged in the mercury removing box (3), and activated carbon particles are also stored in the mercury removing box (3); a cofferdam separation mechanism (9d) is arranged in the purifying box (4);
the filter mechanism (7) comprises an installation disc frame (71), filter meshes (73) and a communication pipe (76), the installation disc frame (71) is fixedly embedded in the filter tank (2), a plurality of annularly arranged arc embedding grooves (72) are formed in the installation disc frame (71), the filter meshes (73) extending inwards are embedded and installed in each arc embedding groove (72), a plurality of micropores (74) are formed in each filter mesh (73), the communication pipe (76) is installed above the filter tank (2), the lower end of the communication pipe (76) penetrates through the top plate of the filter tank (2) and extends to the central position of the installation disc frame (71), and an exhaust pipe (8) is connected to the side wall of the filter tank (2);
the cooling mechanism (6) comprises a cooling pipe (61) and a spiral copper pipe (63), a water inlet pipe head (65) penetrating through the top of the cooling tank (1) is arranged at the top end of the cooling pipe (61), a water drainage pipe head (64) is arranged at the lower part of the cooling pipe (61), and cooling liquid for cooling enters the cooling pipe (61) through the water inlet pipe head (65) and is discharged out of the cooling pipe (61) through the water drainage pipe head (64); the both ends of spiral copper pipe (63) are connecting pipe (62) and the connecting pipe (66) of giving vent to anger respectively for admitting air, connecting pipe (62) of admitting air is located the upper end of spiral copper pipe (63) and upwards runs through the top of cooling jar (1), connecting pipe (66) of giving vent to anger is located the lower extreme of spiral copper pipe (63) and runs through the bottom of cooling jar (1) downwards, and connecting pipe (66) of giving vent to anger is connected with the upper end of communicating pipe (76), the outer wall at cooling tube (61) is established in spiral copper pipe (63) winding cover, mercury-containing industrial waste gas gets into spiral copper pipe (63) through connecting pipe (62) of admitting air, and spiral copper pipe (63) are.
2. The filtration and purification device for treating industrial waste gas containing mercury according to claim 1, characterized in that: the device is characterized by further comprising a pretreatment device, the mercury-containing industrial waste gas enters the cooling tank (1) after being treated by the pretreatment device, the pretreatment device comprises a spraying box (10), a spraying box air inlet pipe (17) is arranged on one side of the spraying box (10), a spraying box air outlet pipe (18) is arranged at the top end of the other side of the spraying box (10), the high-temperature mercury-containing industrial waste gas enters the spraying box (10) through the spraying box air inlet pipe (17) and is discharged out of the spraying box (10) through the spraying box air outlet pipe (18), and the spraying box air outlet pipe (18) is communicated with an air inlet connecting pipe (62) above the cooling tank (1);
still be equipped with cooling body wet return (15) and cooling body inlet tube (16) in one side of spray box (10), cooling body wet return (15) set up in the top of spray box (10) lateral wall, cooling body inlet tube (16) set up in the below of spray box (10) lateral wall, inlet pipe head (65) and the cooling body inlet tube (16) intercommunication that spray box (10) lateral wall below set up of cooling pipe (61) top, drainage pipe head (64) and the cooling body wet return (15) intercommunication that spray box (10) lateral wall top set up of cooling pipe (61) below.
3. The filtration and purification device for treating industrial waste gas containing mercury according to claim 2, characterized in that: a refrigerator (14) is arranged at a port of a cooling mechanism water return pipe (15), the refrigerator (14) is fixedly installed on the side wall of the spray box (10), cooling liquid discharged from a water discharge pipe head (64) can be cooled through the refrigerator (14), the spray pipe (11) is arranged above the inside of the spray box (10), a plurality of spray headers (12) are arranged on the spray pipe (11), the spray pipe (11) is arranged above a spray box air inlet pipe (17) and below a spray box air outlet pipe (18), one end of the spray pipe (11) penetrates through the side wall of the spray box (10) and is connected with the refrigerator (14), and water liquid in the cooling mechanism water return pipe (15) can be sprayed out from the spray headers (12) on the spray pipe (11) after passing through the refrigerator (14);
a water suction pump (13) is arranged at the port of the cooling mechanism water inlet pipe (16), the water suction pump (13) is fixedly arranged on the side wall of the spraying box (10), and cooling liquid in the spraying box (10) can be pumped into the cooling mechanism water inlet pipe (16) and the cooling pipe (61) through the water suction pump (13).
4. The filtration and purification device for treating industrial waste gas containing mercury according to claim 3, characterized in that: a liquid inlet pipe (19) and a liquid outlet pipe (20) are further mounted on the side wall of the spraying box (10), the liquid inlet pipe (19) is mounted above the side wall of the spraying box (10) and located above a spraying box air inlet pipe (17), the liquid outlet pipe (20) is mounted below the side wall of the spraying box (10), cooling liquid is added into the spraying box (10) through the liquid inlet pipe (19), the highest position of the liquid level of the added cooling liquid in the spraying box (10) is located below the spraying box air inlet pipe (17), and control valves are arranged on the liquid inlet pipe (19) and the liquid outlet pipe (20);
the cooling liquid is a mercury absorption cooling liquid which is: aqueous potassium permanganate solution, aqueous bleaching powder solution, or aqueous sodium hypochlorite solution.
5. The filtration and purification device for treating industrial waste gas containing mercury according to claim 1, characterized in that: the gas filling mechanism (9a) comprises a chlorine injection pipe (91a), a first ring pipe (92a) and a second ring pipe (93a), the chlorine injection pipe (91a) is fixedly arranged on the mercury removing box (3) and extends into the mercury removing box (3) in a penetrating manner, the first ring pipe (92a) is fixedly arranged in an upper box body of the mercury removing box (3) through a pipe support, a plurality of annularly distributed exhaust nozzles are formed in the pipe surface, close to the inner side of the bottom, of the first ring pipe (92a), the second ring pipe (93a) is fixedly arranged in a lower box body of the mercury removing box (3) through the pipe support, a plurality of annularly distributed exhaust nozzles are formed in the pipe surface, close to the inner side of the top, of the second ring pipe (93a), gas inlets in the first ring pipe (92a) and the second ring pipe (93a) are respectively communicated with the chlorine injection pipe (91a), and the other end of the chlorine injection pipe (91a) is connected with a chlorine tank (9g) through an exhaust valve, and the chlorine gas tank (9g) is fixedly arranged on the mercury removing tank (3) through a support.
6. The filtration and purification device for treating industrial waste gas containing mercury according to claim 1, characterized in that: aggravate mechanism (9b) and include driving motor (91b), U type agitator (92b) and puddler (93b), driving motor (91b) fixed mounting is in the bottom of removing mercury tank (3), and the output of driving motor (91b) extends to and removes in mercury tank (3) and fixed mounting has U type agitator (92b), fixed mounting has many puddlers (93b) on U type agitator (92b), aggravate mechanism (9b) and be used for stirring the active carbon granule that stores in removing mercury tank (3).
7. The filtration and purification device for treating industrial waste gas containing mercury according to claim 1, characterized in that: the exhaust pipe (8) that filter tank (2) are connected through its lateral wall communicates with remove mercury box (3), and exhaust pipe (8) extend to and install shunt tubes (9) on removing the inside mouth of pipe of mercury box (3), and shunt tubes (9) set up the region between first ring pipe (92a) and second ring pipe (93a) of removing mercury box (3) inside, be equipped with a plurality of gas pocket on the outer pipe wall of shunt tubes (9).
8. The filtration and purification device for treating industrial waste gas containing mercury according to claim 1, characterized in that: cofferdam separating mechanism (9d) is equipped with a plurality of layers of filtration membrane (92d) including hollow plate (91d) in the arc, filtration membrane (92d) and connecting plate (93d), be equipped with a plurality of layers of filtration membrane (92d) below hollow plate (91d) in the arc, separate through connecting plate (93d) of installing a plurality of annular distribution between filtration membrane (92d) of upper and lower adjacent layer, space between adjacent connection plate (93d) constitutes exhaust flow way (95d) about adjacent filtration membrane (92d), a plurality of air inlet channel (94d) have been seted up in the relative both sides of hollow plate (91d) in the arc, the roof inboard at purifying box (4) is connected through many erection columns (9e) to outer edge of hollow plate (91d) in the arc.
9. The filtration and purification device for treating industrial waste gas containing mercury according to claim 2, characterized in that: the bottom of the purification box (4) is provided with an exhaust end, the top end of the subsequent treatment tank (9h) is provided with a subsequent treatment tank air inlet pipe (23), the upper end of the subsequent treatment tank air inlet pipe (23) is connected with the exhaust end at the bottom of the purification box (4), a sodium hydroxide aqueous solution (25) is stored in the subsequent treatment tank (9h), the lower end of the subsequent treatment tank air inlet pipe (23) penetrates through the top plate of the subsequent treatment tank (9h) and extends to the position of the inner cavity of the subsequent treatment tank (9h) close to the bottom end, the lower end of the subsequent treatment tank air inlet pipe (23) is immersed in the sodium hydroxide aqueous solution (25), the air exhausted from the exhaust end at the bottom of the purification box (4) is flushed into the sodium hydroxide aqueous solution (25) through the subsequent treatment tank air inlet pipe (23), a clean exhaust pipe (22) is arranged above the side wall of the subsequent treatment tank (9h), the clean exhaust pipe (22) is arranged, the air flow coming out from the upper part of the liquid level of the sodium hydroxide water solution (25) is discharged from a clean discharge pipe (22) arranged above the side wall of the subsequent treatment tank (9 h).
10. The filtration and purification device for treating industrial waste gas containing mercury according to claim 9, characterized in that: a spray head is arranged at the lower end of the air inlet pipe (23) of the subsequent treatment tank; a waste discharge pipe (24) is arranged at the bottom of the subsequent treatment tank (9h), and a control valve is arranged on the waste discharge pipe (24);
a trash valve (75) is arranged at the bottom of the filtering tank (2);
the cooling pipe (61) is fixedly arranged in the cooling tank (1) through a pipe clamp;
a filter screen (21) is arranged on the inner port of the cooling mechanism water inlet pipe (16) extending into the spray box (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010667039.4A CN111744317A (en) | 2020-07-13 | 2020-07-13 | Filtering and purifying device for treating mercury-containing industrial waste gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010667039.4A CN111744317A (en) | 2020-07-13 | 2020-07-13 | Filtering and purifying device for treating mercury-containing industrial waste gas |
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| CN111744317A true CN111744317A (en) | 2020-10-09 |
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| CN202010667039.4A Pending CN111744317A (en) | 2020-07-13 | 2020-07-13 | Filtering and purifying device for treating mercury-containing industrial waste gas |
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