CN111888886A - Method and device for treating waste gas generated in production of low-concentration permanent violet - Google Patents
Method and device for treating waste gas generated in production of low-concentration permanent violet Download PDFInfo
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- CN111888886A CN111888886A CN202010879176.4A CN202010879176A CN111888886A CN 111888886 A CN111888886 A CN 111888886A CN 202010879176 A CN202010879176 A CN 202010879176A CN 111888886 A CN111888886 A CN 111888886A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 107
- CGLVZFOCZLHKOH-UHFFFAOYSA-N 8,18-dichloro-5,15-diethyl-5,15-dihydrodiindolo(3,2-b:3',2'-m)triphenodioxazine Chemical compound CCN1C2=CC=CC=C2C2=C1C=C1OC3=C(Cl)C4=NC(C=C5C6=CC=CC=C6N(C5=C5)CC)=C5OC4=C(Cl)C3=NC1=C2 CGLVZFOCZLHKOH-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001179 sorption measurement Methods 0.000 claims abstract description 108
- 239000007789 gas Substances 0.000 claims abstract description 107
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000003795 desorption Methods 0.000 claims abstract description 65
- 239000007787 solid Substances 0.000 claims abstract description 27
- 239000003054 catalyst Substances 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 36
- 230000003197 catalytic effect Effects 0.000 claims description 27
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 5
- DWDURZSYQTXVIN-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-methyliminocyclohexa-2,5-dien-1-ylidene)methyl]aniline Chemical compound C1=CC(=NC)C=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 DWDURZSYQTXVIN-UHFFFAOYSA-N 0.000 claims description 4
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 abstract description 18
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 abstract description 16
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 abstract description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 6
- 239000001569 carbon dioxide Substances 0.000 abstract description 6
- 239000002910 solid waste Substances 0.000 abstract description 6
- DSVGQVZAZSZEEX-UHFFFAOYSA-N [C].[Pt] Chemical compound [C].[Pt] DSVGQVZAZSZEEX-UHFFFAOYSA-N 0.000 abstract description 4
- UKVIEHSSVKSQBA-UHFFFAOYSA-N methane;palladium Chemical compound C.[Pd] UKVIEHSSVKSQBA-UHFFFAOYSA-N 0.000 abstract description 4
- 238000011272 standard treatment Methods 0.000 abstract description 3
- 239000012071 phase Substances 0.000 description 55
- 229920006395 saturated elastomer Polymers 0.000 description 10
- 239000007792 gaseous phase Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 2
- 235000005811 Viola adunca Nutrition 0.000 description 2
- 240000009038 Viola odorata Species 0.000 description 2
- 235000013487 Viola odorata Nutrition 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- JJWKPURADFRFRB-UHFFFAOYSA-N carbon oxide sulfide Natural products O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 1
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Images
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
- B01D53/02—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
- B01D53/04—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 with stationary adsorbents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Abstract
The invention provides a method and a device for treating low-concentration permanent violet production waste gas, and belongs to the technical field of permanent violet production waste gas treatment. Collecting low-concentration waste gas containing chlorobenzene, o-dichlorobenzene, benzenethiol and other organic components from a permanent violet production workshop, adsorbing and removing the organic components in the low-concentration waste gas by using a solid adsorption medium such as activated carbon, reducing the content of the organic components in the low-concentration waste gas, and realizing standard emission. Organic components adsorbed by the solid adsorption medium are desorbed at a preset desorption temperature to generate a desorption gas phase, the desorption gas phase is oxidized and incinerated at high temperature under the action of a palladium-carbon catalyst or a platinum-carbon catalyst to decompose into substances such as carbon dioxide and the like, standard treatment of low-concentration waste gas in the permanent violet production workshop is realized, the waste gas treatment efficiency is high, a large amount of solid waste cannot be generated, and the treatment process is environment-friendly.
Description
Technical Field
The invention belongs to the technical field of permanent violet production waste gas treatment, and particularly relates to a low-concentration permanent violet production waste gas treatment method and device.
Background
Permanent violet RL with molecular formula C34H22Cl2N4O2The blue-violet powder is bright-colored blue-violet powder, and has high tinting strength, excellent heat resistance, excellent light fastness and excellent sublimation resistance. Can be used for coloring paint, ink, rubber and plastic and for coloring synthetic fiber stock solution.
The permanent violet RL is produced by using carbazole as main material and through alkylation, nitration, reduction, condensation, ring closure and ball milling. In the production process of the permanent violet RL, the tail gas from a main device contains high-concentration harmful waste gas, mainly contains chlorobenzene, o-dichlorobenzene, benzenethiol and other substances, and cannot be directly discharged outside. Generally, the waste gas generated in the permanent violet RL production process is treated by an activated carbon adsorption method to reduce the content of organic components in the permanent violet waste gas. However, the content of organic components in the permanent violet waste gas treated by the activated carbon adsorption method, especially the content of chlorobenzene, o-dichlorobenzene and benzenethiol, is still high, especially in the later period of activated carbon adsorption, the activated carbon is nearly adsorbed to saturation, and the content of the organic components in the permanent violet waste gas even exceeds 1000mg/Nm3This exhaust gas needs further treatment to meet the emission requirements up to standard.
Disclosure of Invention
In view of the above, the invention provides a method for treating waste gas from low-concentration permanent violet production, so as to solve the technical problems of low treatment efficiency and large amount of solid waste generated in the treatment process of the waste gas from low-concentration permanent violet production in the prior art.
The invention also provides a device for treating the waste gas produced by the low-concentration permanent violet production, so that the waste gas produced by the low-concentration permanent violet production can be discharged after reaching the standard.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for treating waste gas generated in production of low-concentration permanent violet comprises the following steps:
a. pretreating the waste gas generated in the production of low-concentration permanent violet;
b. adsorbing the low-concentration permanent violet production waste gas by using a solid adsorption medium, adsorbing organic components in the low-concentration permanent violet production waste gas on the solid adsorption medium, and discharging the adsorbed residual gas phase;
c. at a preset desorption temperature, carrying out desorption treatment on the organic substances adsorbed on the solid adsorption medium to obtain a desorption gas phase;
d. and (4) carrying out catalytic incineration treatment on the desorbed gas phase at a preset incineration temperature.
Preferably, in step c, the predetermined desorption temperature is 90 ℃ to 150 ℃.
Preferably, in step d, the predetermined incineration temperature is equal to or higher than 350 ℃.
Preferably, the method further comprises the following steps:
e. and carrying out secondary adsorption treatment on the tail gas generated by desorption gas-phase catalytic incineration treatment.
Preferably, the method further comprises the following steps:
a1. the pretreated low-concentration permanent violet production waste gas is firstly subjected to adsorption pretreatment by activated carbon.
A low concentration permanent purple production exhaust treatment device includes:
the adsorption device comprises a plurality of adsorption carbon boxes which are arranged in parallel, wherein solid adsorption bed layers are filled in the adsorption carbon boxes, and the adsorption carbon boxes are connected with a low-concentration waste gas feeding pipe, an adsorption residual gas phase discharge pipe, a desorption agent feeding pipe and a desorption gas phase discharge pipe;
the inlet of the residual gas phase adsorption discharge fan is connected with the residual gas phase adsorption discharge pipe, and the outlet of the residual gas phase adsorption discharge fan is discharged;
the inlet of the desorption gas phase discharge fan is connected with the desorption gas phase discharge pipe; and
the catalytic incinerator is internally provided with an incineration catalyst bed layer, and the feed end of the catalytic incinerator is connected with the outlet end of the desorption gas-phase discharge fan.
Preferably, a low-concentration waste gas feed valve is arranged on the low-concentration waste gas feed pipe; the adsorption residual gas phase discharge pipe is provided with an adsorption residual gas phase discharge valve; a desorption agent feed valve is arranged on the desorption agent feed pipe; and a desorption gas phase discharge valve is arranged on the desorption gas phase discharge pipe.
Preferably, the low-concentration permanent violet production waste gas treatment device comprises at least 3 adsorption carbon boxes which are arranged in parallel.
Preferably, the catalytic incinerator is provided with an incineration exhaust gas discharge pipe which is connected with the low-concentration waste gas feed pipe.
Preferably, the low-concentration waste gas feeding pipe is also provided with a pretreatment activated carbon box.
According to the technical scheme, the invention provides a method and a device for treating waste gas generated in low-concentration permanent violet production, and the method and the device have the beneficial effects that: collecting low-concentration waste gas containing chlorobenzene, o-dichlorobenzene, benzenethiol and other organic components from a permanent violet production workshop, firstly pretreating, removing impurities and stabilizing the content of the organic components in the waste gas, and firstly adsorbing and removing the organic components in the unorganized discharged waste gas by using a solid adsorption medium, such as high-activity activated carbon and the like, so as to reduce the content of the organic components in the unorganized discharged waste gas and realize the standard discharge. Organic components adsorbed by the solid adsorption medium are desorbed at a preset desorption temperature to generate a desorption gas phase, the desorption gas phase is oxidized and incinerated at high temperature under the action of a palladium-carbon catalyst or a platinum-carbon catalyst to decompose into substances such as carbon dioxide and the like, the purpose of up-to-standard treatment of unorganized emission waste gas in the permanent violet production workshop is achieved, the waste gas treatment efficiency is high, a large amount of solid waste cannot be generated, and the treatment process is environment-friendly.
Drawings
FIG. 1 is a process flow diagram of a method for treating waste gas from low-concentration permanent violet production.
FIG. 2 is a pipeline flow diagram of a low-concentration permanent violet production waste gas treatment device.
FIG. 3 is a line flow diagram of an adsorption carbon tank.
In the figure: the device comprises a low-concentration permanent violet production waste gas treatment device 10, an unorganized exhaust gas discharge main pipe 20, an adsorption carbon box 100, a solid adsorption bed layer 101, a low-concentration waste gas feed pipe 110, a low-concentration waste gas feed valve 111, an adsorption residual gas phase discharge pipe 120, an adsorption residual gas phase discharge valve 121, a desorbent feed pipe 130, a desorbent feed valve 131, a desorption gas phase discharge pipe 140, a desorption gas phase discharge valve 141, an adsorption residual gas phase discharge fan 200, a desorption gas phase discharge fan 300, a catalytic incinerator 400, an incineration catalyst bed layer 401, an incineration tail gas discharge pipe 410 and a pretreatment activated carbon box 500.
Detailed Description
The technical scheme and the technical effect of the invention are further elaborated in the following by combining the drawings of the invention.
Referring to fig. 1, a method for treating waste gas from low-concentration permanent violet production includes the following steps:
s10, pretreating the waste gas generated by the low-concentration permanent violet production.
Generally, the high-concentration waste gas from the permanent violet production device is firstly treated to reduce the content of organic components in the waste gas to 600mg/Nm3Forming low-concentration waste gas, removing impurities, dewatering and other pretreatment, and simultaneously further reducing the content of organic components in the waste gas to make the content of the organic components in the waste gas be stabilized to 600mg/Nm3The following.
And S20, adsorbing the low-concentration permanent violet production waste gas by using a solid adsorption medium, adsorbing organic components in the low-concentration permanent violet production waste gas on the solid adsorption medium, and discharging the adsorbed residual gas phase.
The low-concentration permanent violet production waste gas mainly contains chlorobenzene, o-dichlorobenzene, benzenethiol and other organic components, the high-activity active carbon is used for adsorbing the organic components contained in the low-concentration permanent violet production waste gas, most of the organic components can be collected by the active carbon, and after the active carbon is adsorbed and collected, the content of the organic components in the low-concentration permanent violet production waste gas is reduced, so that the emission requirement of the atmosphere comprehensive emission standard can be met, green clean production is realized, and the peculiar smell of the surrounding environment of a production plant area is reduced.
Further, the discharged permanent violet production waste gas which reaches the standard after treatment is firstly washed by alkali, and acidic substances in the waste gas are further removed and then discharged.
And S30, carrying out desorption treatment on the organic substances adsorbed on the solid adsorption medium at a preset desorption temperature to obtain a desorbed gas phase.
And when the solid adsorption medium is saturated or semi-saturated, desorbing the organic component adsorbed on the solid adsorption medium at a preset temperature, and generating a desorption gas phase after desorption. For example, the predetermined desorption temperature is 90 ℃ to 150 ℃, and the high temperature is beneficial to improving the desorption efficiency of the organic components, especially chlorobenzene and o-dichlorobenzene, prolonging the service life of the solid adsorption medium and reducing the generation amount of solid wastes.
And S40, carrying out catalytic incineration treatment on the desorbed gas phase at a preset incineration temperature.
The desorbed gas phase generated by desorption is sent into a catalytic incinerator, and is oxidized and incinerated at high temperature under the action of a palladium-carbon catalyst or a platinum-carbon catalyst to be decomposed into substances such as carbon dioxide and the like, so that the purpose of up-to-standard treatment of inorganically discharged waste gas in the permanent violet production workshop is achieved, the waste gas treatment efficiency is high, no solid waste is generated in a large amount, and the treatment process is environment-friendly. In a preferred embodiment, the preset incineration temperature is more than or equal to 350 ℃, so that the organic components contained in the desorbed gas phase can be fully combusted, and the content of the organic components in the discharged tail gas is reduced.
In one embodiment, the method further comprises the following steps:
and S50, carrying out secondary adsorption treatment on the tail gas generated by the desorption gas-phase catalytic incineration treatment.
The desorbed gas phase is decomposed into substances such as carbon dioxide, oxysulfide and the like after being oxidized and burned at high temperature by the catalytic incinerator, generally, the treatment efficiency of the catalytic incinerator can reach about 95%, the tail gas still contains a small amount of organic components which are not completely oxidized and decomposed, the tail gas of the catalytic incinerator is mixed with the gas phase from an unorganized exhaust gas main pipe, and the gas phase is adsorbed by the solid adsorption medium again, so that the content of the organic components in the discharged tail gas is further reduced, and the environmental protection pressure is reduced.
In one embodiment, in order to further improve the treatment efficiency of the low-concentration permanent violet production waste gas and reduce the content of organic components in the low-concentration permanent violet production waste gas to the maximum extent, the method for treating the low-concentration permanent violet production waste gas further comprises the following steps:
s11, carrying out adsorption pretreatment on the pretreated low-concentration permanent violet production waste gas by using activated carbon.
That is to say, be provided with activated carbon adsorption carbon box on the low concentration permanent purple waste gas house steward, low concentration permanent purple waste gas is at first carried out the preliminary treatment through activated carbon adsorption carbon box, after tentatively reducing organic component content in the unorganized emission waste gas, carries out advanced treatment again to the life cycle of extension solid adsorption medium (for example, high-quality activated carbon), reduces the use amount of solid adsorption medium, thereby reduce cost. Meanwhile, the two-stage adsorption treatment effectively reduces the content of organic components in the inorganically discharged waste gas and improves the treatment efficiency of the inorganically discharged waste gas. Furthermore, two stages of activated carbon adsorption carbon boxes connected in series are arranged on the unorganized exhaust gas main pipe, so that the treatment efficiency of unorganized exhaust gas is further improved.
Referring to fig. 2 and fig. 3 together, in another embodiment, a low-concentration permanent violet production waste gas treatment device 10 is used for implementing the low-concentration permanent violet production waste gas treatment method described above, and reducing the content of organic components in the low-concentration permanent violet production waste gas to reach the emission standard. The low-concentration permanent violet production waste gas treatment device 10 includes: the adsorption and desorption device comprises a plurality of adsorption carbon boxes 100, an adsorption residual gas phase discharge fan 200, a desorption gas phase discharge fan 300 and a catalytic incinerator 400 which are arranged in parallel, wherein a solid adsorption bed layer 101 is filled in each adsorption carbon box 100, and the adsorption carbon boxes 100 are connected with a low-concentration waste gas feed pipe 110, an adsorption residual gas phase discharge pipe 120, a desorption agent feed pipe 130 and a desorption gas phase discharge pipe 140. The inlet of the adsorption surplus gas phase discharge fan 200 is connected to the adsorption surplus gas phase discharge pipe 120, and the outlet is vented. The inlet of the desorption gas phase discharge fan 300 is connected with the desorption gas phase discharge pipe 140. The catalytic incinerator 400 is internally provided with an incineration catalyst bed layer 401, and the feed end of the catalytic incinerator 400 is connected with the outlet end of the desorption gas phase discharging fan 300.
Further, be provided with low concentration waste gas feed valve 111 on the low concentration waste gas feed pipe 110, be provided with on the absorption surplus gaseous phase discharge pipe 120 and adsorb surplus gaseous phase discharge valve 121, 130 are provided with desorption agent feed valve 131 on the desorption agent feed pipe, be provided with desorption gaseous phase bleeder valve 141 on the desorption gaseous phase discharge pipe 140. The states of the valves are switched to realize the switching between the adsorption state and the desorption state of the adsorption carbon box 100.
In one embodiment, the low concentration permanent violet production waste gas treatment device 10 includes at least 3 adsorption carbon boxes 100 arranged in parallel. For example, the low-concentration permanent violet production waste gas treatment device 10 includes 5 adsorption carbon boxes 100 arranged in parallel, and the low-concentration waste gas feed pipe 110 of each adsorption carbon box 100 is connected to the unorganized discharge waste gas main pipe 20, so that unorganized discharge waste gas from a production plant can simultaneously enter the 5 adsorption carbon boxes 100 arranged in parallel for adsorption, and the adsorption flux is improved, thereby improving the treatment efficiency of the unorganized discharge waste gas. Under normal conditions, 3 or 4 in 5 adsorption carbon boxes 100 are in the adsorption operation state, and the remaining 2 or 1 are in the desorption operation state to ensure the treatment efficiency of inorganization exhaust gas.
Specifically, after being collected, the unorganized exhaust gas from the permanent violet production workshop is conveyed into the adsorption carbon box 100 in an adsorption operation state by the unorganized exhaust gas main pipe 20, organic components such as chlorobenzene, o-dichlorobenzene, benzenethiol and the like in the unorganized exhaust gas are trapped by the solid adsorption bed layer 101, and the residual adsorption gas phase is discharged through the residual adsorption gas phase discharge pipe 120 under the action of the residual adsorption gas phase discharge fan 200 to reach the standard. When the adsorption carbon box 100 in the adsorption operation state is saturated or half-saturated in adsorption, the adsorption carbon box 100 saturated or half-saturated in adsorption is switched off (i.e., the low-concentration exhaust gas feed valve 111 and the adsorption residual gas phase discharge valve 121 of the adsorption carbon box 100 saturated or half-saturated in adsorption are closed), and the adsorption carbon box 100 which is ready for use after desorption is used (i.e., the low-concentration exhaust gas feed valve 111 and the adsorption residual gas phase discharge valve 121 of the adsorption carbon box 100 to be used are opened).
The desorption agent feed valve 131 and the desorption gas phase discharge valve 141 of the adsorption saturated or semi-saturated adsorption carbon box 100 are opened, the organic components adsorbed on the solid adsorption bed layer 101 are desorbed by a high-temperature desorption medium (for example, oxygen-enriched air at a temperature of 90 to 150 ℃) and the desorption gas phase enters the catalytic incinerator 400 through the desorption gas phase discharge pipe 140 under the action of the desorption gas phase discharge fan 300. The catalytic incinerator 400 is internally provided with an incineration catalyst bed 401 formed by a palladium-carbon catalyst or a platinum-carbon catalyst, and the desorbed gas phase is oxidized and decomposed into substances such as carbon dioxide and the like at a high temperature (for example, the temperature in the catalytic incinerator 400 is higher than 600 ℃), so that the harmless treatment of the inorganically discharged waste gas is realized, and the risk of discharging organic components such as chlorobenzene and the like along with tail gas is reduced. The low-concentration permanent violet production waste gas treatment device 10 achieves standard-reaching treatment of low-concentration permanent violet waste gas, is high in waste gas treatment efficiency, does not generate a large amount of solid waste, and is environment-friendly in the treatment process.
In a preferred embodiment, in order to further reduce the content of organic components in the discharged tail gas and achieve the emission up to the standard, the catalytic incinerator 400 has a burned tail gas discharge pipe 410, and the burned tail gas discharge pipe 410 is connected to the low-concentration waste gas feed pipe 110. That is, the incineration exhaust gas discharge pipe 410 is connected to the front end of the unorganized exhaust gas main pipe 20, the desorbed gas phase is oxidized and incinerated at high temperature by the catalytic incinerator 400, and then decomposed into substances such as carbon dioxide and sulfur oxide, and generally, the treatment efficiency of the catalytic incinerator can reach about 95%, and the exhaust gas still contains a small amount of organic components which are not completely oxidized and decomposed, and the exhaust gas of the catalytic incinerator is mixed with the gas phase from the unorganized exhaust gas main pipe 20, and is adsorbed again by the adsorption carbon box 100, so that the content of the organic components in the exhaust gas to be discharged is further reduced, and the environmental protection pressure is reduced.
Further, the low-concentration waste gas feeding pipe 110 is further provided with a pretreatment activated carbon box 500, that is, the inorganization exhaust gas main pipe 20 is provided with an activated carbon adsorption carbon box 500, inorganization exhaust gas is firstly pretreated by the activated carbon adsorption carbon box 500, and after the content of organic components in the inorganization exhaust gas is preliminarily reduced, advanced treatment is performed, so that the service cycle of solid adsorption media (such as high-quality activated carbon) is prolonged, the usage amount of the solid adsorption media is reduced, and the cost is reduced. Meanwhile, the two-stage adsorption treatment effectively reduces the content of organic components in the inorganically discharged waste gas and improves the treatment efficiency of the inorganically discharged waste gas. Furthermore, two stages of activated carbon adsorption carbon boxes connected in series are arranged on the unorganized exhaust gas main pipe, so that the treatment efficiency of unorganized exhaust gas is further improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A method for treating waste gas generated in production of low-concentration permanent violet is characterized by comprising the following steps:
a. pretreating the waste gas generated in the production of low-concentration permanent violet;
b. adsorbing the low-concentration permanent violet production waste gas by using a solid adsorption medium, adsorbing organic components in the low-concentration permanent violet production waste gas on the solid adsorption medium, and discharging the adsorbed residual gas phase;
c. at a preset desorption temperature, carrying out desorption treatment on the organic substances adsorbed on the solid adsorption medium to obtain a desorption gas phase;
d. and (4) carrying out catalytic incineration treatment on the desorbed gas phase at a preset incineration temperature.
2. The method for treating the waste gas generated in the production of low-concentration permanent violet according to claim 1, wherein the predetermined desorption temperature in the step c is 90-150 ℃.
3. The method for treating the waste gas generated in the production of low-concentration permanent violet according to claim 1, wherein the predetermined incineration temperature in the step d is not less than 350 ℃.
4. The method for treating waste gas from the production of low-concentration permanent violet according to claim 1, further comprising the steps of:
e. and carrying out secondary adsorption treatment on the tail gas generated by desorption gas-phase catalytic incineration treatment.
5. The method for treating waste gas from the production of low-concentration permanent violet according to claim 1, further comprising the steps of:
a1. the pretreated low-concentration permanent violet production waste gas is firstly subjected to adsorption pretreatment by activated carbon.
6. The utility model provides a low concentration permanent purple waste gas processing apparatus which characterized in that includes:
the adsorption device comprises a plurality of adsorption carbon boxes which are arranged in parallel, wherein solid adsorption bed layers are filled in the adsorption carbon boxes, and the adsorption carbon boxes are connected with a low-concentration waste gas feeding pipe, an adsorption residual gas phase discharge pipe, a desorption agent feeding pipe and a desorption gas phase discharge pipe;
the inlet of the residual gas phase adsorption discharge fan is connected with the residual gas phase adsorption discharge pipe, and the outlet of the residual gas phase adsorption discharge fan is discharged;
the inlet of the desorption gas phase discharge fan is connected with the desorption gas phase discharge pipe; and
the catalytic incinerator is internally provided with an incineration catalyst bed layer, and the feed end of the catalytic incinerator is connected with the outlet end of the desorption gas-phase discharge fan.
7. The low-concentration permanent violet production waste gas treatment device of claim 6, wherein the low-concentration waste gas feed pipe is provided with a low-concentration waste gas feed valve; the adsorption residual gas phase discharge pipe is provided with an adsorption residual gas phase discharge valve; a desorption agent feed valve is arranged on the desorption agent feed pipe; and a desorption gas phase discharge valve is arranged on the desorption gas phase discharge pipe.
8. The low-concentration permanent violet production exhaust gas treatment device of claim 7, comprising at least 3 adsorption carbon boxes arranged in parallel.
9. The apparatus for treating waste gas from production of low-concentration permanent violet according to claim 6, wherein the catalytic incinerator is provided with an incineration exhaust gas discharge pipe, and the incineration exhaust gas discharge pipe is connected with the low-concentration waste gas feed pipe.
10. The low-concentration permanent violet production waste gas treatment device of claim 6, wherein the low-concentration waste gas feeding pipe is further provided with a pretreatment activated carbon box.
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| CN202010879176.4A CN111888886A (en) | 2020-08-27 | 2020-08-27 | Method and device for treating waste gas generated in production of low-concentration permanent violet |
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| CN202010879176.4A CN111888886A (en) | 2020-08-27 | 2020-08-27 | Method and device for treating waste gas generated in production of low-concentration permanent violet |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204247047U (en) * | 2014-09-17 | 2015-04-08 | 厦门佰欧科技工程有限公司 | Organic exhaust gas adsorption concentrates catalytic combustion and low-temperature plasma coupling purification system |
| JP2015150519A (en) * | 2014-02-17 | 2015-08-24 | 東洋紡株式会社 | waste water treatment system |
| CN105688665A (en) * | 2016-03-25 | 2016-06-22 | 无锡西玖环保科技有限公司 | System applied to organic waste gas treatment, and working method thereof |
| CN208809741U (en) * | 2018-08-24 | 2019-05-03 | 江苏永春环境工程有限公司 | A kind of activated carbon adsorption arrangement for catalytic purification |
| CN212283452U (en) * | 2020-08-27 | 2021-01-05 | 银川百泓新材料科技有限公司 | Low-concentration permanent violet production waste gas treatment device |
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2020
- 2020-08-27 CN CN202010879176.4A patent/CN111888886A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015150519A (en) * | 2014-02-17 | 2015-08-24 | 東洋紡株式会社 | waste water treatment system |
| CN204247047U (en) * | 2014-09-17 | 2015-04-08 | 厦门佰欧科技工程有限公司 | Organic exhaust gas adsorption concentrates catalytic combustion and low-temperature plasma coupling purification system |
| CN105688665A (en) * | 2016-03-25 | 2016-06-22 | 无锡西玖环保科技有限公司 | System applied to organic waste gas treatment, and working method thereof |
| CN208809741U (en) * | 2018-08-24 | 2019-05-03 | 江苏永春环境工程有限公司 | A kind of activated carbon adsorption arrangement for catalytic purification |
| CN212283452U (en) * | 2020-08-27 | 2021-01-05 | 银川百泓新材料科技有限公司 | Low-concentration permanent violet production waste gas treatment device |
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