CN112844009A - Utilize SDS dry process desulfurization's coke oven flue gas integrated purification system - Google Patents
Utilize SDS dry process desulfurization's coke oven flue gas integrated purification system Download PDFInfo
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- 239000003546 flue gas Substances 0.000 title claims abstract description 57
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 54
- 230000023556 desulfurization Effects 0.000 title claims abstract description 54
- 239000000571 coke Substances 0.000 title claims abstract description 48
- 238000000746 purification Methods 0.000 title claims abstract description 20
- 238000001035 drying Methods 0.000 title description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000000919 ceramic Substances 0.000 claims abstract description 47
- 230000003197 catalytic effect Effects 0.000 claims abstract description 43
- 239000000428 dust Substances 0.000 claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 26
- 230000007704 transition Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 10
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical group [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 9
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 150000002013 dioxins Chemical class 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- 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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- 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
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- 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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
本发明提出了一种利用SDS干法脱硫的焦炉烟气综合净化系统，包括沿焦炉烟气流动方向依次设置的原烟道、SDS干法脱硫模块、过渡烟道、陶瓷催化滤袋模块、净烟道和烟囱，所述SDS干法脱硫模块包括脱硫剂喷射装置、文丘里段和脱硫反应器，焦炉烟气通过原烟道进入，并与脱硫剂喷射装置喷出的脱硫剂相接触，所述脱硫剂喷射装置的出口烟道通过文丘里段与脱硫反应器相连接，焦炉烟气和脱硫剂共同进入文丘里段和脱硫反应器内充分混合反应，所述脱硫反应器的出口通过过渡烟道与陶瓷催化滤袋模块相连接，进行脱硝、除尘，所述陶瓷催化滤袋模块的出口通过净烟道连接烟囱。该系统具有较高的脱硫脱硝除尘效率，可协同去除重金属、二噁英等污染物，氨逃逸率低。
The present invention proposes a coke oven flue gas comprehensive purification system utilizing SDS dry desulfurization, which includes an original flue, an SDS dry desulfurization module, a transition flue, and a ceramic catalytic filter bag module sequentially arranged along the flow direction of the coke oven flue gas. , clean flue and chimney, the SDS dry desulfurization module includes a desulfurization agent injection device, a venturi section and a desulfurization reactor, the coke oven flue gas enters through the original flue, and is in phase with the desulfurization agent sprayed from the desulfurization agent injection device. Contact, the outlet flue of the desulfurization agent injection device is connected with the desulfurization reactor through the Venturi section, and the coke oven flue gas and the desulfurization agent enter the Venturi section together and fully mix and react in the desulfurization reactor. The outlet is connected to the ceramic catalytic filter bag module through the transition flue for denitration and dust removal, and the outlet of the ceramic catalytic filter bag module is connected to the chimney through the clean flue. The system has high desulfurization, denitrification and dust removal efficiency, can synergistically remove pollutants such as heavy metals and dioxins, and has a low ammonia escape rate.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of flue gas purification, in particular to a coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization.
[ background of the invention ]
The coke oven smoke, namely the waste gas generated after the fuel is heated and combusted on the coke oven, the smoke components are different according to the coke oven type, the production process, the fuel type and the like, and SO in the smoke2And NOx concentration range is wide and reaches 50-600mg/m3And 400-1200mg/m3The temperature of the flue gas is lower, and is generally at 190 ℃ and 280 ℃.
Because of the influence of the coke oven flue gas characteristics, the application of various desulfurization and denitrification processes is restricted by different degrees, and at present, flue gas purification technologies such as SCR denitration + dust removal + ammonia desulfurization, SCR denitration + dust removal + calcium-based SDA semi-dry desulfurization, calcium-based SDA semi-dry desulfurization + dust removal + medium-low temperature SCR denitration, active carbon dry desulfurization and denitrification and the like are mainly adopted in practical engineering at home and abroad to control SO in the coke oven flue gas2And NOx emissions.
The prior desulfurization technology has the following defects:
1. when the flue gas of the coke oven is purified by adopting the processes of SCR denitration, dedusting and ammonia desulphurization, the ammonia desulphurization easily causes acid corrosion to a chimney, the equipment maintenance cost is high, and the ammonium bisulfate generated by preposed denitration influences the stability of the catalyst.
2. When the SCR denitration, dedusting and calcium-based SDA semi-dry desulfurization process is adopted, ammonium bisulfate generated by preposed denitration influences the stability of the catalyst, and the method has large floor area and high energy consumption.
3. When the calcium-based SDA semi-dry desulfurization, dedusting and medium-low temperature SCR denitration process is adopted, the occupied area is large, and the energy consumption is high.
4. When the activated carbon dry desulfurization and denitrification process is adopted, the materials are easy to burn, the temperature drop of the flue gas is large, and the one-time investment and operation cost are high.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, provides a coke oven flue gas comprehensive purification system utilizing SDS dry desulfurization, has high desulfurization, denitrification and dust removal efficiency, can remove pollutants such as heavy metal, dioxin and the like in a synergistic manner, and has low ammonia escape rate.
In order to achieve the purpose, the invention provides a coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization, which comprises an original flue, an SDS dry desulphurization module, a transition flue, a ceramic catalysis filter bag module, a clean flue and a chimney which are sequentially arranged along the flow direction of coke oven flue gas, wherein the SDS dry desulphurization module is arranged at the downstream of the original flue, the SDS dry desulphurization module comprises a desulfurizer injection device, a Venturi section and a desulphurization reactor, the outlet of the original flue is connected with the desulfurizer injection device, the coke oven flue gas enters the desulfurizer injection device through the original flue and is contacted with a desulfurizer sprayed by the desulfurizer injection device, the outlet flue of the desulfurizer injection device is connected with the desulphurization reactor through the Venturi section, the coke oven flue gas and the desulfurizer jointly enter the Venturi section and are fully mixed and reacted in the desulphurization reactor to complete desulphurization, the outlet of the desulphurization reactor is connected with the ceramic catalysis filter bag module through transition, the coke oven flue gas desulfurized by the desulfurization reactor is connected to the ceramic catalytic filter bag module for denitration and dust removal, the outlet of the ceramic catalytic filter bag module is connected with the chimney through the clean flue, and the flue gas desulfurized, denitrated and dust removed is discharged into the atmosphere through the clean flue and the chimney in sequence.
Preferably, the SDS dry desulphurization module further comprises a desulfurizer powder bin and a blanking device connected with the desulfurizer powder bin, and the desulfurizer in the desulfurizer powder bin enters the desulfurizer spraying device through the blanking device.
Preferably, the desulfurizing agent is sodium bicarbonate.
Preferably, a plurality of guide vanes which are spirally upward at 45 degrees are arranged in the venturi section and the desulfurization reactor.
Preferably, the diameter of the Venturi section is 0.75-0.9 times of the diameter of the desulfurization reactor.
Preferably, the ceramic catalytic filter bag module comprises an ammonia injection device and a ceramic catalytic filter bag, the SDA desulfurization tower is connected with the ammonia injection device through a transition flue, and a denitration reducing agent injected by the ammonia injection device is contacted with desulfurized coke oven flue gas and jointly enters the ceramic catalytic filter bag for denitration and dust removal.
Preferably, the ceramic catalytic filter bag comprises a main reaction chamber, a plurality of groups of ceramic catalytic filter tubes arranged in the main reaction chamber, an ash removal device, a discharge hopper arranged at the bottom of the main reaction chamber and an air outlet chamber arranged at the top of the main reaction chamber, the denitration reducing agent sprayed by the ammonia spraying device and the flue gas of the desulfurization coke oven are mixed and enter the main reaction chamber, catalytic reduction reaction is carried out at the ceramic catalytic filter tubes to complete denitration, large-particle dust in the main reaction chamber falls into the discharge hopper under the action of gravity, small-particle dust is deposited on the ceramic catalytic filter tubes, the ash removal device is used for blowing the small-particle dust on the ceramic catalytic filter tubes into the discharge hopper to complete dust removal, the air outlet chamber is connected with a chimney through a clean flue, and the flue gas after desulfurization, denitration and dust removal is discharged into the atmosphere through the air outlet chamber, the clean flue and the chimney.
Preferably, an ammonia oxidation catalyst layer is further arranged in the gas outlet chamber and used for further realizing low ammonia escape.
The invention has the beneficial effects that: the dust removal and denitration integrated device has the advantages that the desulfurized flue gas can directly enter the ceramic catalytic filter bag for reaction without a temperature rise device, the layout is reasonable, the occupied area is small, the investment is low, the process technology is simple and practical, the operation is stable, and the maintenance is convenient. The whole operation is anhydrous, the temperature drop is avoided, and the corrosion of equipment and a chimney is avoided. The desulfurizer has wide source, low cost, less byproducts, high sodium sulfate content and convenient utilization. The integrated catalyst has the advantages of high efficiency, corrosion resistance, high temperature resistance and desulfurization function.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a coke oven flue gas comprehensive purification system utilizing SDS dry desulfurization;
FIG. 2 is a schematic sectional structure diagram of a venturi section of a coke oven flue gas comprehensive purification system utilizing SDS dry desulfurization.
[ detailed description ] embodiments
Referring to fig. 1, the invention relates to a coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization, which comprises an original flue 1, an SDS dry desulphurization module 2, a transition flue 3, a ceramic catalytic filter bag module 4, a clean flue 5 and a chimney 6 which are sequentially arranged along the flow direction of coke oven flue gas, wherein the SDS dry desulphurization module 2 is arranged at the downstream of the original flue 1, the SDS dry desulphurization module 2 comprises a desulfurizer injection device 23, a venturi section 24 and a desulphurization reactor 25, an outlet of the original flue 1 is connected with the desulfurizer injection device 23, coke oven flue gas enters the desulfurizer injection device 23 through the original flue 1 and contacts with desulfurizer sprayed by the desulfurizer injection device 23, an outlet flue of the desulfurizer injection device 23 is connected with the desulphurization reactor 25 through the venturi section 24, and coke oven flue gas and desulfurizer jointly enter the venturi section 24 and the desulphurization reactor 25 for complete mixing reaction, and after the desulfurization is finished, the outlet of the desulfurization reactor 25 is connected with the ceramic catalytic filter bag module 4 through the transition flue 3, the coke oven flue gas desulfurized by the desulfurization reactor 25 is connected with the ceramic catalytic filter bag module 4 for denitration and dust removal, the outlet of the ceramic catalytic filter bag module 4 is connected with the chimney 6 through the clean flue 5, and the flue gas desulfurized, denitrated and dust removed is discharged into the atmosphere through the clean flue 5 and the chimney 6 in sequence.
Further, the SDS dry desulfurization module 2 further includes a desulfurizer powder bin 21 and a blanking device 22 connected to the desulfurizer powder bin 21, and the desulfurizer in the desulfurizer powder bin 21 enters a desulfurizer spraying device 23 through the blanking device 22. The desulfurizer is sodium bicarbonate.
Further, a plurality of guide vanes 20 with 45 degrees spiral upward are arranged inside the venturi section 24 and the desulfurization reactor 25.
Further, the SDS dry desulphurization module 2 has a main body material of Q345, and the diameter of the Venturi section 24 is 0.75-0.9 times of the diameter of the desulphurization reactor 25.
Further, the ceramic catalytic filter bag module 4 comprises an ammonia injection device 41 and a ceramic catalytic filter bag 42, the SDA desulfurization tower 24 is connected to the ammonia injection device 41 through the transition flue 3, and a denitration reducing agent injected by the ammonia injection device 41 contacts with desulfurized coke oven flue gas and jointly enters the ceramic catalytic filter bag 42 for denitration and dust removal. Specifically, the ceramic catalytic filter bag 42 comprises a main reaction chamber 43, a plurality of groups of ceramic catalytic filter tubes 45 arranged in the main reaction chamber 43, a dust removing device 46, a discharge hopper 44 arranged at the bottom of the main reaction chamber 43, and an air outlet chamber 47 arranged at the top of the main reaction chamber 43, the denitration reducing agent sprayed by the ammonia spraying device 41 and the flue gas of the desulfurization coke oven are mixed and enter the main reaction chamber 43, catalytic reduction reaction occurs at the ceramic catalytic filter tube 45 to complete denitration, large particle dust in the main reaction chamber 43 falls into the discharge hopper 44 under the action of gravity, small particle dust is deposited on the ceramic catalytic filter tube 45, the ash removal device 46 is used for blowing the small particle dust on the ceramic catalytic filter tube 45 into the discharge hopper 44 to complete dust removal, the air outlet chamber 47 is connected with the chimney 6 through the clean flue 5, and the flue gas after desulfurization, denitration and dust removal is discharged into the atmosphere through the air outlet chamber 47, the clean flue 5 and the chimney 6 in sequence. And an ammonia oxidation catalyst layer is arranged in the gas outlet chamber 47 and used for further realizing low ammonia escape.
The working process of the invention is as follows:
in the using process of the coke oven flue gas comprehensive purification system utilizing the SDS dry desulfurization, sodium bicarbonate serving as a desulfurizing agent in a desulfurizing agent powder bin 21 enters an original flue 1 through a blanking device 22 and a desulfurizing agent injection device 23 to contact with coke oven flue gas, and then enters a Venturi section 24 and a desulfurization reactor 25 together to be fully mixed and react, so that the desulfurization is completed. The desulfurized coke oven flue gas enters a ceramic catalytic filter bag module 4 from a transition flue 3. The ceramic catalyzed filter bag module 4 includes an ammonia injection device 41 and a ceramic catalyzed filter bag 42 for NOx and dust control. The denitration reducing agent ammonia enters the transition flue 3 through the ammonia injection device 41 to contact with the desulfurized coke oven flue gas, and enters the main reaction chamber 43 of the ceramic catalytic filter bag 42 together, and catalytic reduction reaction occurs at the ceramic catalytic filter tube 45 to complete denitration. The large-particle dust falls into the discharge hopper 44 under the action of gravity, the small-particle dust is deposited on the ceramic catalytic filter tube 45, and the ash removal device 46 sweeps the small-particle dust on the ceramic catalytic filter tube 45 into the discharge hopper 44 to complete dust removal. The flue gas after desulfurization, denitrification and dust removal is discharged into the atmosphere through the gas outlet chamber 47, the clean flue 5 and the chimney 6 in sequence.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (8)
1. A coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization is characterized in that: the device comprises an original flue (1), an SDS dry desulphurization module (2), a transition flue (3), a ceramic catalytic filter bag module (4), a clean flue (5) and a chimney (6) which are sequentially arranged along the flowing direction of coke oven flue gas, wherein the SDS dry desulphurization module (2) is arranged at the downstream of the original flue (1), the SDS dry desulphurization module (2) comprises a desulfurizer injection device (23), a Venturi section (24) and a desulphurization reactor (25), the outlet of the original flue (1) is connected with the desulfurizer injection device (23), the coke oven flue gas enters the desulfurizer injection device (23) through the original flue (1) and contacts with the desulfurizer sprayed by the desulfurizer injection device (23), the outlet flue of the desulfurizer injection device (23) is connected with the desulphurization reactor (25) through the Venturi section (24), and the coke oven flue gas and the desulfurizer jointly enter the Venturi section (24) and the desulphurization reactor (25) for fully mixing reaction, and the desulfurization is completed, the outlet of the desulfurization reactor (25) is connected with the ceramic catalytic filter bag module (4) through the transition flue (3), the coke oven flue gas desulfurized by the desulfurization reactor (25) is connected into the ceramic catalytic filter bag module (4) for denitration and dust removal, the outlet of the ceramic catalytic filter bag module (4) is connected with the chimney (6) through the clean flue (5), and the flue gas desulfurized, denitrated and dust removed is discharged into the atmosphere through the clean flue (5) and the chimney (6) in sequence.
2. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: the SDS dry desulphurization module (2) further comprises a desulfurizer powder bin (21) and a blanking device (22) connected with the desulfurizer powder bin (21), and desulfurizer in the desulfurizer powder bin (21) enters a desulfurizer injection device (23) through the blanking device (22).
3. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: the desulfurizer is sodium bicarbonate.
4. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: and a plurality of guide vanes (20) which are spirally upward at 45 degrees are arranged in the venturi section (24) and the desulfurization reactor (25).
5. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: the diameter of the Venturi section (24) is 0.75-0.9 times of the diameter of the desulfurization reactor (25).
6. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: the ceramic catalytic filter bag module (4) comprises an ammonia injection device (41) and a ceramic catalytic filter bag (42), the SDA desulfurization tower (24) is connected with the ammonia injection device (41) through a transition flue (3), and a denitration reducing agent injected by the ammonia injection device (41) is contacted with desulfurized coke oven flue gas and jointly enters the ceramic catalytic filter bag (42) for denitration and dust removal.
7. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 6, characterized in that: the ceramic catalytic filter bag (42) comprises a main reaction chamber (43), a plurality of groups of ceramic catalytic filter tubes (45) arranged in the main reaction chamber (43), an ash removal device (46), a discharge hopper (44) arranged at the bottom of the main reaction chamber (43) and an air outlet chamber (47) arranged at the top of the main reaction chamber (43), wherein a denitration reducing agent sprayed by an ammonia spraying device (41) and desulfurization coke oven flue gas are mixed and enter the main reaction chamber (43), a catalytic reduction reaction is carried out at the ceramic catalytic filter tubes (45) to complete denitration, large-particle dust in the main reaction chamber (43) falls into the discharge hopper (44) under the action of gravity, small-particle dust is deposited on the ceramic catalytic filter tubes (45), the ash removal device (46) is used for sweeping the small-particle dust on the ceramic catalytic filter tubes (45) into the discharge hopper (44) to complete dust removal, the air outlet chamber (47) is connected with a chimney (6) through a clean flue (5), the flue gas after desulfurization, denitration and dust removal is discharged into the atmosphere through an air outlet chamber (47), a clean flue (5) and a chimney (6) in sequence.
8. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 7, characterized in that: and an ammonia oxidation catalyst layer is also arranged in the gas outlet chamber (47) and used for further realizing low ammonia escape.
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| CN113731047A (en) * | 2021-08-16 | 2021-12-03 | 中科三清科技有限公司 | Flue gas desulfurization, denitrification and dust removal integrated device and treatment process thereof |
| CN113926299A (en) * | 2021-11-26 | 2022-01-14 | 安徽恒夏环保科技有限公司 | A kind of high-efficiency sodium-based dry desulfurization device and process method |
| CN114405265A (en) * | 2021-12-31 | 2022-04-29 | 新兴铸管股份有限公司 | Coke oven flue desulfurization and denitrification system |
| CN116651169A (en) * | 2023-08-01 | 2023-08-29 | 昆明理工大学 | A dust removal system and dust removal process for desulfurization and denitrification of flue gas from tube furnaces |
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| CN116651169A (en) * | 2023-08-01 | 2023-08-29 | 昆明理工大学 | A dust removal system and dust removal process for desulfurization and denitrification of flue gas from tube furnaces |
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