CN105536482A - Asphalt fume treatment device for asphalt modifying process - Google Patents
Asphalt fume treatment device for asphalt modifying process Download PDFInfo
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- CN105536482A CN105536482A CN201610062993.4A CN201610062993A CN105536482A CN 105536482 A CN105536482 A CN 105536482A CN 201610062993 A CN201610062993 A CN 201610062993A CN 105536482 A CN105536482 A CN 105536482A
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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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
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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
- B01D53/14—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
- B01D53/1406—Multiple stage absorption
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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
- B01D53/14—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
- B01D53/1456—Removing acid components
- B01D53/1468—Removing hydrogen sulfide
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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
- B01D53/14—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
- B01D53/1487—Removing organic compounds
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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
- B01D53/14—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
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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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/50—Combinations of absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- 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
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Abstract
The invention discloses an asphalt fume treatment device for an asphalt modifying process and belongs to the field of exhaust gas treatment equipment. According to the asphalt fume treatment device, an inlet of the upper end of a cooled liquid collecting tank is connected with an exhaust gas source, and an outlet of the lower end of the cooled liquid collecting tank is connected with an inlet of a draught fan; a blowoff opening is formed in the bottom of the cooled liquid collecting tank, and cooled collected liquid is blown off from the blowoff opening before the volume of the collected liquid reaches an upper-limit liquid level. An outlet of the draught fan is connected with a fume inlet of a solvent absorption tower, a fume outlet of the solvent absorption tower is connected with a fume inlet of an alkali liquor absorption tower, a bottom solvent outlet of the solvent absorption tower is connected with an inlet of a solvent circulating pump, an outlet of the solvent circulating pump is connected with inlets of shower heads of all layers, a bottom alkali liquor outlet of the alkali liquor absorption tower is connected with an inlet of an alkali liquor circulating pump, an outlet of the alkali liquor circulating pump is connected with the inlets of the shower heads of all the layers, a fume outlet of the alkali liquor absorption tower is connected with a pneumatic three-way valve, one end of the pneumatic three-way valve is vented, one end of the pneumatic three-way valve is connected with a fume inlet of an activated carbon adsorber, and a fume outlet of the activated carbon adsorber is vented.
Description
Technical field
The present invention relates to tail gas treatment device field, particularly a kind of pitch modification technique bitumen flue gas treating apparatus.
Background technology
In modified pitch is produced, need asphalt heating to 175 DEG C and above temperature, need to add the modifier such as SBS, rubber powder simultaneously, the auxiliary agents such as stabilizing agent, produce glance coal, BaP, NMHC and hydrogen sulfide gas in production process, produce tail gas uncontrollable discharge and can cause serious atmosphere pollution.
Existing device for absorbing tail gas is mostly condensing unit+gas-liquid separation device+alkali liquor absorption device.Current device has three shortcomings: can only tackle low concentration gas; Waste gas clearance is not obvious; Absorbing liquid utilization rate is low.Therefore need to strengthen absorbing liquid concentration, absorbing liquid is changed frequent, operation, control difficulty.
Summary of the invention
In order to make up the deficiencies in the prior art, the invention provides a kind of absorbing liquid can make full use of, and can process the organic and inorganic nuisance in tail gas and the pitch modification technique bitumen flue gas treating apparatus of the accessory substance recoverable generated.Cost-saving and reduce environmental pressure.
Technical scheme of the present invention is:
A kind of pitch modification technique bitumen flue gas treating apparatus, comprises the cooling liquid collecting tank 3, solvent absorption tower 7, alkali liquor absorption tower 10 and the activated carbon adsorber 13 that are connected successively by pipeline; Pipeline between described cooling liquid collecting tank 3 and solvent absorption tower 7 is provided with pressure difference transmitter 5 and air-introduced machine 6;
Described cooling liquid collecting tank 3 comprises the first smoke inlet, heat-exchanger rig, liquid collecting space and the first exhanst gas outlet; Described first smoke inlet is communicated with tail gas source 1;
Described solvent absorption tower 7 comprises the second smoke inlet 28, second exhanst gas outlet 8, is provided with packing layer 30, wire mesh demister 29, solvent inlet 9 and solvent outlet 32 in described solvent absorption tower 7; Described solvent inlet 9 is by pipeline communication solvent source 24, and the pipeline between described solvent inlet 9 and solvent source 24 is provided with solvent circulating pump 20; The end of described solvent inlet 9 is communicated with some spray heads; Described second smoke inlet 28 is communicated with the first exhanst gas outlet;
Described alkali liquor absorption tower 10 comprises the 3rd smoke inlet 35, the 3rd exhanst gas outlet 36, is provided with packing layer 30, wire mesh demister 29, alkali lye import 12 and alkali lye outlet 33 in described alkali liquor absorption tower 10; Described alkali lye import 12 is by pipeline communication alkali lye source 15, and the pipeline between described alkali lye outlet 33 and alkali lye source 15 is provided with NaOH solution circulating pump 17; The end of described alkali lye import 12 is communicated with some spray heads; Described 3rd smoke inlet 35 is communicated with the second exhanst gas outlet 8;
Described activated carbon adsorber 13 comprises the 4th smoke inlet 36, the 4th exhanst gas outlet 37, active carbon add entrance 38, is provided with activated carbon adsorption layer 39 in described activated carbon adsorber 13; Described activated carbon adsorption layer 39 is between the 4th smoke inlet 36 and the 4th exhanst gas outlet 37; Solid discharge 40 is provided with bottom described activated carbon adsorber 13; Described 4th smoke inlet 36 is communicated with the 3rd exhanst gas outlet 36, and described 4th exhanst gas outlet 37 is communicated with blow-down pipe 14.
Air-introduced machine 6 provides power for flue gas transport process, and motor is VFC, and air-introduced machine 6 entrance installs pressure difference transmitter 5, and processing load is reflected as pressure reduction change, and according to pressure reduction change, control system regulates fan frequency conversion automatically, reaches energy saving effect.
Preferably, in described cooling liquid collecting tank 3, heat-exchanger rig is positioned at above liquid collecting space, and heat-exchanger rig is tubular heat exchanger; Heat-exchanger rig comprises cooling medium entrance 4 and cooling medium outlet 2; Be provided with cooling liquid collecting discharging hole 23 below described liquid collecting space, described cooling liquid collecting discharging hole 23 place is provided with dirt discharging valve.Cooling medium comprises forced conveyance natural wind or recirculated water or other refrigerants; First smoke inlet of tail gas on cooling liquid collecting tank 3 enters, and through heat exchange cooling, keep in after partial fume condensation in liquid collecting space, remainder flue gas flows out into solvent absorption tower 7 from the first exhanst gas outlet of cooling liquid collecting tank 3.Liquid collecting space mounting thermometer and liquid level gauge, before the liquid level in liquid collecting space reaches upper limit level, open the dirt discharging valve on cooling liquid collecting discharging hole 23, by the liquid emptying in liquid collecting space.
Preferably, be provided with the solvent inlet 9 that at least three packing layers 30 being positioned at differing heights and at least three are positioned at differing heights in described solvent absorption tower 7, described packing layer 30 and solvent inlet 9 are interspersed; In each pair of packing layer 30 and solvent inlet 9, solvent inlet 9 is positioned at the top of packing layer 30; Described demister 29 is positioned under the exhanst gas outlet of tower body top, is solvent stock district below described packing layer.That is, packing layer 30, solvent inlet 9, packing layer 30, solvent inlet 9, packing layer 30, solvent inlet 9, wire mesh demister 29 is respectively in solvent absorption tower 7 from the bottom to top.Packing layer and spray head are along tower height direction Multi-layers distributing.Packing layer 30 also can arrange some layers.Packing layer and spray head are along tower height direction Multi-layers distributing, solvent pump in solvent stock district is delivered to each group of spray head at solvent inlet 9 place by solvent circulating pump 20, atomizing spray under a certain pressure, contact with the flue gas adverse current flowed from bottom to top, packing layer 30 strengthens gas-liquid contact, improves absorption efficiency; Solvent is organic solvent, is back to solvent stock district, recycles in rich absorbent flue gas after organic principle.Flue gas is before the second exhanst gas outlet 8 is discharged, and wire mesh demister 29 plays the effect of gas-liquid separation.
Further, in described solvent stock district, be provided with solvent level meter 31, thermometer 27, above solvent stock district with bottom packing layer below space in be provided with Pressure gauge 26; Also thermometer 27 and Pressure gauge 26 is provided with before second exhanst gas outlet 8.Before equipment is driven or when needing supplementing solvent, ON cycle pump is to supplementing solvent in tower, and liquid level is no more than liquid level gauge higher limit; Solvent reach capacity concentration need change time, utilize circulating pump to be discharged by tower internal solvent.
Preferably, the pipeline between described solvent source 24 and solvent circulating pump 20 is provided with solvent sample tap 22 and solvent filter 21; Described solvent outlet 32 is by pipeline communication solvent recovery unit 25.The solvent of being discharged by solvent outlet 32 enters solvent recovery unit 25, carries out recycling.
Preferably, be provided with the alkali lye import 12 that at least three packing layers 30 being positioned at differing heights and at least three are positioned at differing heights in described alkali liquor absorption tower 10, described packing layer 30 and alkali lye import 12 are interspersed; In each pair of packing layer 30 and alkali lye import 12, alkali lye import 12 is positioned at the top of packing layer 30; Described demister 29 is positioned under the exhanst gas outlet of tower body top, is alkali lye liquid storage district below described packing layer.Packing layer and spray head are along tower height direction Multi-layers distributing, the each group of spray head at alkali lye import 12 place delivered to by lye pump in alkali lye liquid storage district by NaOH solution circulating pump 17, atomizing spray under a certain pressure, contact with the flue gas adverse current flowed from bottom to top, packing layer 30 strengthens gas-liquid contact, improves absorption efficiency; Be back to alkali lye liquid storage district after alkali liquor absorption acid gas in flue gas, recycle.Flue gas is before the 3rd exhanst gas outlet 36 is discharged, and wire mesh demister 29 plays the effect of gas-liquid separation.
Further, be provided with alkali lye liquid level gauge 34, thermometer 27 in described alkali lye liquid storage district, above alkali lye liquid storage district with in the underlying space of bottom packing layer, be provided with Pressure gauge 26; Also thermometer 27 and Pressure gauge 26 is provided with before 3rd exhanst gas outlet 36.Before equipment is driven or when needing supplementary alkali lye, ON cycle pump supplements alkali lye in tower, and liquid level is no more than liquid level gauge higher limit; Alkali lye reach capacity concentration need change time, utilize circulating pump by tower alkali lye discharge.
Preferably, the pipeline between described alkali lye outlet 33 and NaOH solution circulating pump 17 is provided with alkali lye sample tap 19 and alkali lye filter 18; Described alkali lye outlet 33 is by pipeline communication alkali liquor recovery device 16.
Preferably, Pressure gauge 26 and thermometer 27 is provided with below the active carbon 39 of described activated carbon adsorber 13.Activated carbon adsorber 13 inside is mainly active carbon, and in absorption tail gas, remaining molecule particles thing etc., make tail gas reach discharge standard.
Preferably, the pipeline between described alkali liquor absorption tower 10 and activated carbon adsorber 13 is provided with three-way diverter valve 11, described three-way diverter valve 11 one end is communicated with blow-down pipe, and the other end is communicated with activated carbon adsorber 13.In Modified Bitumen Production Procedure, flue gas concentration is with production procedure cyclically-varying, three-way diverter valve and production procedure chain, during flue gas concentration height, whole handling process passes through charcoal absorption, time delay switching three-way reversal valve behind peak period, handling process can not pass through charcoal absorption, from alkali liquor absorption tower outlet venting straight.
First smoke inlet of cooling liquid collecting tank upper end is connected with tail gas source, first exhanst gas outlet of cooling liquid collecting tank lower end is connected with air-introduced machine import, cooling liquid collecting discharging hole is established, before liquid collecting capacity reaches upper limit level, from the emptying of cooling liquid collecting discharging hole bottom cooling liquid collecting tank.Air-introduced machine outlet is connected with the second smoke inlet of solvent absorption tower, second exhanst gas outlet of solvent absorption tower is connected with the 3rd smoke inlet of alkali liquor absorption tower, solvent absorption tower bottom solvent outlet is connected with solvent circulating pump import, solvent circulating pump outlet is connected with the import of each layer spray head, the outlet of alkali liquor absorption tower bottom alkali lye is connected with NaOH solution circulating pump import, NaOH solution circulating pump outlet is connected with the import of each layer spray head, alkali liquor absorption tower the 3rd exhanst gas outlet is connected with Pneumatic three-way valve, the emptying of Pneumatic three-way valve one end, one end is connected with the 4th smoke inlet of activated carbon adsorber, activated carbon adsorber the 4th exhanst gas outlet emptying, charcoal absorption tower bottom establishes solid discharge.
The present invention also comprises automatic control system, and automatic control system connects with air-introduced machine, Pressure gauge, thermometer, liquid level gauge, circulating pump, to realize automatic control.
The course of work of bitumen flue gas treating apparatus of the present invention is as follows:
1, before modified pitch is produced, whether each valve on checkout facility and pipeline is in correct state:
1) if use first, solvent absorption tower must be entered solvent valve, the alkali lye valve that enters of alkali liquor absorption tower is opened, and utilizes circulating pump to fluid infusion in absorption tower; Active carbon is added by activated carbon adsorber;
2) dirt discharging valve cooling liquid collecting tank is closed;
3) solvent absorption tower enter solvent valve, sample valve and waste oil dirt discharging valve are closed; The pump early gate of solvent circulating pump, pump late gate is all opened;
4) alkali liquor absorption tower enter alkali lye valve, sample valve and spent lye dirt discharging valve are closed; The pump early gate of NaOH solution circulating pump, pump late gate is all opened.
2, open general supply, cooling liquid collecting tank passes into cooling medium, opens air-introduced machine, opens two circulating pumps.
3, production process, exhaust gas processing device runs automatically.
4, stopped process: stop air-introduced machine successively, cut off cooling medium, stop two circulating pumps, close the valve on pipeline, finally close general supply.
Beneficial effect of the present invention is:
Bitumen flue gas treating apparatus of the present invention can process the bitumen flue gas (tail gas) of high concentration, vent gas treatment speed is fast, efficiency is high, and the utilization rate of organic solvent and alkali lye two kinds of absorbing liquids is high, not only cost-saving, reduce the replacing number of times of absorbing liquid simultaneously, simple to operation.
Present device investment and operating cost low, and energy-saving safe, is suitable for applying.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of pitch modification technique bitumen flue gas treating apparatus of the present invention;
Fig. 2 is the external structure schematic diagram of solvent absorption tower in bitumen flue gas treating apparatus of the present invention;
Fig. 3 is the internal structure schematic diagram of solvent absorption tower in bitumen flue gas treating apparatus of the present invention;
Fig. 4 is the external structure schematic diagram of alkali liquor absorption tower in bitumen flue gas treating apparatus of the present invention;
Fig. 5 is the internal structure schematic diagram of alkali liquor absorption tower in bitumen flue gas treating apparatus of the present invention;
Fig. 6 is the external structure schematic diagram of activated carbon adsorber in bitumen flue gas treating apparatus of the present invention;
Fig. 7 is the internal structure schematic diagram of activated carbon adsorber in bitumen flue gas treating apparatus of the present invention.
Detailed description of the invention
Embodiment 1
A kind of pitch modification technique bitumen flue gas treating apparatus, comprises the cooling liquid collecting tank 3, solvent absorption tower 7, alkali liquor absorption tower 10 and the activated carbon adsorber 13 that are connected successively by pipeline; Pipeline between cooling liquid collecting tank 3 and solvent absorption tower 7 is provided with air-introduced machine 6, is provided with pressure difference transmitter 5 before air-introduced machine 6 entrance.Air-introduced machine 6 provides power for flue gas transport process, and motor is VFC, and air-introduced machine 6 entrance installs pressure difference transmitter 5, and processing load is reflected as pressure reduction change, and according to pressure reduction change, control system regulates fan frequency conversion automatically, reaches energy saving effect.
Cooling liquid collecting tank 3 comprises the first smoke inlet, heat-exchanger rig, liquid collecting space and the first exhanst gas outlet; First smoke inlet is communicated with tail gas source 1.In cooling liquid collecting tank 3, heat-exchanger rig is positioned at above liquid collecting space, and heat-exchanger rig is tubular heat exchanger; Heat-exchanger rig comprises cooling medium entrance 4 and cooling medium outlet 2; Be provided with cooling liquid collecting discharging hole 23 below liquid collecting space, cooling liquid collecting discharging hole 23 place is provided with dirt discharging valve.Cooling medium comprises forced conveyance natural wind or recirculated water or other refrigerants; First smoke inlet of tail gas on cooling liquid collecting tank 3 enters, and through heat exchange cooling, keep in after partial fume condensation in liquid collecting space, remainder flue gas flows out into solvent absorption tower 7 from the first exhanst gas outlet of cooling liquid collecting tank 3.Liquid collecting space mounting thermometer and liquid level gauge, before the liquid level in liquid collecting space reaches upper limit level, open the dirt discharging valve on cooling liquid collecting discharging hole 23, by the liquid emptying in liquid collecting space.
Solvent absorption tower 7 comprises the second smoke inlet 28, second exhanst gas outlet 8, is provided with packing layer 30, wire mesh demister 29, solvent inlet 9 and solvent outlet 32 in solvent absorption tower 7; Solvent inlet 9 is by pipeline communication solvent source 24, and the pipeline between solvent inlet 9 and solvent source 24 is provided with solvent circulating pump 20; The end of solvent inlet 9 is communicated with some spray heads; Second smoke inlet 28 is communicated with the first exhanst gas outlet.
Wherein, be provided with the solvent inlet 9 that at least three packing layers 30 being positioned at differing heights and at least three are positioned at differing heights in solvent absorption tower 7, packing layer 30 and solvent inlet 9 are interspersed; In each pair of packing layer 30 and solvent inlet 9, solvent inlet 9 is positioned at the top of packing layer 30; Bottom packing layer 30 is solvent stock district below.That is, solvent stock district, packing layer 30, solvent inlet 9, packing layer 30, solvent inlet 9, packing layer 30, solvent inlet 9, wire mesh demister 29 is respectively in solvent absorption tower 7 from the bottom to top.Packing layer and spray head are along tower height direction Multi-layers distributing, solvent pump in solvent stock district is delivered to each group of spray head at solvent inlet 9 place by solvent circulating pump 20, atomizing spray under a certain pressure, contact with the flue gas adverse current flowed from bottom to top, packing layer 30 strengthens gas-liquid contact, improves absorption efficiency; Solvent is organic solvent, is back to solvent stock district, recycles in rich absorbent flue gas after organic principle.Flue gas is before the second exhanst gas outlet 8 is discharged, and wire mesh demister 29 plays the effect of gas-liquid separation.
Be provided with solvent level meter 31, thermometer 27 in solvent stock district, above solvent stock district with bottom packing layer below space be provided with Pressure gauge 26; Also thermometer 27 and Pressure gauge 26 is provided with before second exhanst gas outlet 8.Before equipment is driven or when needing supplementing solvent, ON cycle pump is to supplementing solvent in tower, and liquid level is no more than liquid level gauge higher limit; Solvent reach capacity concentration need change time, utilize circulating pump to be discharged by tower internal solvent.
Pipeline between solvent source 24 and solvent circulating pump 20 is provided with solvent sample tap 22 and solvent filter 21; Solvent outlet 32 is by pipeline communication solvent recovery unit 25.The solvent of being discharged by solvent outlet 32 enters solvent recovery unit 25, carries out recycling.
Alkali liquor absorption tower 10 comprises the 3rd smoke inlet 35, the 3rd exhanst gas outlet 36, is provided with packing layer 30, wire mesh demister 29, alkali lye import 12 and alkali lye outlet 33 in alkali liquor absorption tower 10; Alkali lye import 12 is by pipeline communication alkali lye source 15, and the pipeline between alkali lye outlet 33 and alkali lye source 15 is provided with NaOH solution circulating pump 17; The end of alkali lye import 12 is communicated with some spray heads; 3rd smoke inlet 35 is communicated with the second exhanst gas outlet 8.
Be provided with the alkali lye import 12 that at least three packing layers 30 being positioned at differing heights and at least three are positioned at differing heights in alkali liquor absorption tower 10, packing layer 30 and alkali lye import 12 are interspersed; In each pair of packing layer 30 and alkali lye import 12, alkali lye import 12 is positioned at the top of packing layer 30; Lowermost layer packing layer 30 is alkali lye liquid storage district below.That is, alkali lye liquid storage district, packing layer 30, alkali lye import 12, packing layer 30, alkali lye import 12, packing layer 30, alkali lye import 12, wire mesh demister 29 is respectively in alkali liquor absorption tower 10 from the bottom to top.Packing layer and spray head are along tower height direction Multi-layers distributing, the each group of spray head at alkali lye import 12 place delivered to by lye pump in alkali lye liquid storage district by NaOH solution circulating pump 17, atomizing spray under a certain pressure, contact with the flue gas adverse current flowed from bottom to top, packing layer 30 strengthens gas-liquid contact, improves absorption efficiency; Be back to alkali lye liquid storage district after alkali liquor absorption acid gas in flue gas, recycle.Flue gas is before the 3rd exhanst gas outlet 36 is discharged, and wire mesh demister 29 plays the effect of gas-liquid separation.
Alkali lye liquid level gauge 34, thermometer 27 and Pressure gauge 26 is provided with in alkali lye liquid storage district; Also thermometer 27 and Pressure gauge 26 is provided with before 3rd exhanst gas outlet 36.Before equipment is driven or when needing supplementary alkali lye, ON cycle pump supplements alkali lye in tower, and liquid level is no more than liquid level gauge higher limit; Alkali lye reach capacity concentration need change time, utilize circulating pump by tower alkali lye discharge.
Pipeline between alkali lye outlet 33 and NaOH solution circulating pump 17 is provided with alkali lye sample tap 19 and alkali lye filter 18; Alkali lye outlet 33 is by pipeline communication alkali liquor recovery device 16.
Activated carbon adsorber 13 comprises the 4th smoke inlet 36, the 4th exhanst gas outlet 37, active carbon add entrance 38, is provided with activated carbon adsorption layer 39 in activated carbon adsorber 13; Activated carbon adsorption layer 39 is between the 4th smoke inlet 36 and the 4th exhanst gas outlet 37; Solid discharge 40 is provided with bottom activated carbon adsorber 13; 4th smoke inlet 36 is communicated with the 3rd exhanst gas outlet 36, and the 4th exhanst gas outlet 37 is communicated with blow-down pipe 14.Pressure gauge 26 and thermometer 27 is provided with below active carbon 39 in activated carbon adsorber 13.Activated carbon adsorber 13 inside is mainly active carbon, and in absorption tail gas, remaining molecule particles thing etc., make tail gas reach discharge standard.
Pipeline between alkali liquor absorption tower 10 and activated carbon adsorber 13 is provided with three-way diverter valve 11, three-way diverter valve 11 one end is communicated with blow-down pipe, and the other end is communicated with activated carbon adsorber 13.In Modified Bitumen Production Procedure, flue gas concentration is with production procedure cyclically-varying, three-way diverter valve and production procedure chain, during flue gas concentration height, whole handling process passes through charcoal absorption, time delay switching three-way reversal valve behind peak period, handling process can not pass through charcoal absorption, from alkali liquor absorption tower outlet venting straight.
The present invention also comprises automatic control system, and automatic control system connects with air-introduced machine, Pressure gauge, thermometer, liquid level gauge, circulating pump, to realize automatic control.
The course of work of bitumen flue gas treating apparatus of the present invention is as follows:
1, before modified pitch is produced, whether each valve on checkout facility and pipeline is in correct state:
1) if use first, solvent absorption tower must be entered solvent valve, the alkali lye valve that enters of alkali liquor absorption tower is opened, and utilizes circulating pump to fluid infusion in absorption tower; Active carbon is added by activated carbon adsorber;
2) dirt discharging valve cooling liquid collecting tank is closed;
3) solvent absorption tower enter solvent valve, sample valve and waste oil dirt discharging valve are closed; The pump early gate of solvent circulating pump, pump late gate is all opened;
4) alkali liquor absorption tower enter alkali lye valve, sample valve and spent lye dirt discharging valve are closed; The pump early gate of NaOH solution circulating pump, pump late gate is all opened.
2, open general supply, cooling liquid collecting tank passes into cooling medium, opens air-introduced machine, opens two circulating pumps.
3, production process, exhaust gas processing device runs automatically.
4, stopped process: stop air-introduced machine successively, cut off cooling medium, stop two circulating pumps, close the valve on pipeline, finally close general supply.
Embodiment 2
A kind of pitch modification technique bitumen flue gas treating apparatus, comprises the cooling liquid collecting tank 3, solvent absorption tower 7, alkali liquor absorption tower 10 and the activated carbon adsorber 13 that are connected successively by pipeline; Pipeline between cooling liquid collecting tank 3 and solvent absorption tower 7 is provided with pressure difference transmitter 5 and air-introduced machine 6.Air-introduced machine 6 provides power for flue gas transport process, and motor is VFC, and air-introduced machine 6 entrance installs pressure difference transmitter 5, and processing load is reflected as pressure reduction change, and according to pressure reduction change, control system regulates fan frequency conversion automatically, reaches energy saving effect.
Cooling liquid collecting tank 3 comprises the first smoke inlet, heat-exchanger rig, liquid collecting space and the first exhanst gas outlet; First smoke inlet is communicated with tail gas source 1; Liquid collecting space bottom is provided with leakage fluid dram.Heat-exchanger rig is positioned at the top in liquid collecting space, and tail gas enters cooling liquid collecting tank and first cooled by heat-exchanger rig, and moieties condensation flows into liquid collecting space, and other flue gases enter solvent absorption tower by the first exhanst gas outlet.
Solvent absorption tower 7 comprises the second smoke inlet 28, second exhanst gas outlet 8, packing layer 30, solvent inlet 9, wire mesh demister 29 is provided with from the bottom to top in solvent absorption tower 7, be solvent stock district bottom packing layer 30 in solvent absorption tower 7, bottom solvent stock district, be provided with solvent outlet 32.Solvent inlet 9 is by pipeline communication solvent source 24, and the pipeline between solvent inlet 9 and solvent source 24 is provided with solvent circulating pump 20; The end of solvent inlet 9 is communicated with some spray heads; Second smoke inlet 28 is communicated with the first exhanst gas outlet;
Alkali liquor absorption tower 10 comprises the 3rd smoke inlet 35, the 3rd exhanst gas outlet 36, packing layer 30, alkali lye import 12, wire mesh demister 29 is provided with from the bottom to top in alkali liquor absorption tower 10, in alkali liquor absorption tower 10, the bottom of packing layer 30 is alkali lye liquid storage district, is provided with alkali lye outlet 33 bottom alkali lye liquid storage district.Alkali lye import 12 is by pipeline communication alkali lye source 15, and the pipeline between alkali lye outlet 33 and alkali lye source 15 is provided with NaOH solution circulating pump 17; The end of alkali lye import 12 is communicated with some spray heads; 3rd smoke inlet 35 is communicated with the second exhanst gas outlet 8.
Activated carbon adsorber 13 comprises the 4th smoke inlet 36, the 4th exhanst gas outlet 37, active carbon add entrance 38, is provided with activated carbon adsorption layer 39 in activated carbon adsorber 13; Activated carbon adsorption layer 39 is between the 4th smoke inlet 36 and the 4th exhanst gas outlet 37; Solid discharge 40 is provided with bottom activated carbon adsorber 13; 4th smoke inlet 36 is communicated with the 3rd exhanst gas outlet 36, and the 4th exhanst gas outlet 37 is communicated with blow-down pipe 14.
Claims (10)
1. a pitch modification technique bitumen flue gas treating apparatus, is characterized in that: comprise the cooling liquid collecting tank (3), solvent absorption tower (7), alkali liquor absorption tower (10) and the activated carbon adsorber (13) that are connected successively by pipeline; Pipeline between described cooling liquid collecting tank (3) and solvent absorption tower (7) is provided with pressure difference transmitter (5) and air-introduced machine (6);
Described cooling liquid collecting tank (3) comprises the first smoke inlet, heat-exchanger rig, liquid collecting space and the first exhanst gas outlet; Described first smoke inlet is communicated with tail gas source (1);
Described solvent absorption tower (7) comprises the second smoke inlet (28), the second exhanst gas outlet (8), is provided with packing layer (30), wire mesh demister (29), solvent inlet (9) and solvent outlet (32) in described solvent absorption tower (7); Described solvent inlet (9) is by pipeline communication solvent source (24), and the pipeline between described solvent inlet (9) and solvent source (24) is provided with solvent circulating pump (20); The end of described solvent inlet (9) is communicated with some spray heads; Described second smoke inlet (28) is communicated with the first exhanst gas outlet;
Described alkali liquor absorption tower (10) comprises the 3rd smoke inlet (35), the 3rd exhanst gas outlet (36), is provided with packing layer (30), wire mesh demister (29), alkali lye import (12) and alkali lye outlet (33) in described alkali liquor absorption tower (10); Described alkali lye import (12) is by pipeline communication alkali lye source (15), and the pipeline between described alkali lye outlet (33) and alkali lye source (15) is provided with NaOH solution circulating pump (17); The end of described alkali lye import (12) is communicated with some spray heads; Described 3rd smoke inlet (35) is communicated with the second exhanst gas outlet (8);
Described activated carbon adsorber (13) comprises the 4th smoke inlet (36), the 4th exhanst gas outlet (37), active carbon add entrance (38), is provided with activated carbon adsorption layer (39) in described activated carbon adsorber (13); Described activated carbon adsorption layer (39) is positioned between the 4th smoke inlet (36) and the 4th exhanst gas outlet (37); Described activated carbon adsorber (13) bottom is provided with solid discharge (40); Described 4th smoke inlet (36) is communicated with the 3rd exhanst gas outlet (36), and described 4th exhanst gas outlet (37) is communicated with blow-down pipe (14).
2. pitch modification technique bitumen flue gas treating apparatus as claimed in claim 1, is characterized in that: in described cooling liquid collecting tank (3), heat-exchanger rig is positioned at above liquid collecting space, and heat-exchanger rig is tubular heat exchanger; Heat-exchanger rig comprises cooling medium entrance (4) and cooling medium outlet (2); Be provided with cooling liquid collecting discharging hole (23) below described liquid collecting space, described cooling liquid collecting discharging hole (23) place is provided with dirt discharging valve.
3. pitch modification technique bitumen flue gas treating apparatus as claimed in claim 1, it is characterized in that: be provided with the solvent inlet (9) that at least three packing layers (30) being positioned at differing heights and at least three are positioned at differing heights in described solvent absorption tower (7), described packing layer (30) and solvent inlet (9) are interspersed; Each pair of packing layer (30) is with solvent inlet (9), and solvent inlet (9) is positioned at the top of packing layer (30); Described demister (29) is positioned under the exhanst gas outlet of tower body top, is solvent stock district below described packing layer.
4. pitch modification technique bitumen flue gas treating apparatus as claimed in claim 3, it is characterized in that: in described solvent stock district, be provided with solvent level meter (31), thermometer (27), above solvent stock district with bottom packing layer below space in be provided with Pressure gauge (26); Second exhanst gas outlet (8) is front is also provided with thermometer (27) and Pressure gauge (26).
5. pitch modification technique bitumen flue gas treating apparatus as described in claim 3 or 4, is characterized in that: the pipeline between described solvent source (24) and solvent circulating pump (20) is provided with solvent sample tap (22) and solvent filter (21); Described solvent outlet (32) is by pipeline communication solvent recovery unit (25).
6. pitch modification technique bitumen flue gas treating apparatus as claimed in claim 1, it is characterized in that: be provided with the alkali lye import (12) that at least three packing layers (30) being positioned at differing heights and at least three are positioned at differing heights in described alkali liquor absorption tower (10), described packing layer (30) and alkali lye import (12) are interspersed; Each pair of packing layer (30) is with alkali lye import (12), and alkali lye import (12) is positioned at the top of packing layer (30); Described demister (29) is positioned under the exhanst gas outlet of tower body top, is alkali lye liquid storage district below described packing layer.
7. pitch modification technique bitumen flue gas treating apparatus as claimed in claim 6, it is characterized in that: in described alkali lye liquid storage district, be provided with alkali lye liquid level gauge (34), thermometer (27), above alkali lye liquid storage district with in the underlying space of bottom packing layer, be provided with Pressure gauge (26); 3rd exhanst gas outlet (36) is front is also provided with thermometer (27) and Pressure gauge (26).
8. pitch modification technique bitumen flue gas treating apparatus as claimed in claims 6 or 7, is characterized in that: the pipeline between described alkali lye outlet (33) and NaOH solution circulating pump (17) is provided with alkali lye sample tap (19) and alkali lye filter (18); Described alkali lye outlet (33) is by pipeline communication alkali liquor recovery device (16).
9. pitch modification technique bitumen flue gas treating apparatus as claimed in claim 1, is characterized in that: active carbon (39) below of described activated carbon adsorber (13) is provided with Pressure gauge (26) and thermometer (27).
10. pitch modification technique bitumen flue gas treating apparatus as claimed in claim 1, it is characterized in that: the pipeline between described alkali liquor absorption tower (10) and activated carbon adsorber (13) is provided with three-way diverter valve (11), described three-way diverter valve (11) one end is communicated with blow-down pipe, and the other end is communicated with activated carbon adsorber (13).
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| CN201610062993.4A CN105536482A (en) | 2016-01-30 | 2016-01-30 | Asphalt fume treatment device for asphalt modifying process |
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Application publication date: 20160504 |