CN111841316A - Permanent purple production waste gas high efficiency processing system - Google Patents

Permanent purple production waste gas high efficiency processing system Download PDF

Info

Publication number
CN111841316A
CN111841316A CN202010878016.8A CN202010878016A CN111841316A CN 111841316 A CN111841316 A CN 111841316A CN 202010878016 A CN202010878016 A CN 202010878016A CN 111841316 A CN111841316 A CN 111841316A
Authority
CN
China
Prior art keywords
waste gas
catalytic
pipe
spraying
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010878016.8A
Other languages
Chinese (zh)
Inventor
汪国建
黄迪勇
李泽荣
穆乾龙
陈星�
王聪
王忠群
王国青
时春玲
孙宝宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yinchuan Baihong New Material Technology Co ltd
Original Assignee
Yinchuan Baihong New Material Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yinchuan Baihong New Material Technology Co ltd filed Critical Yinchuan Baihong New Material Technology Co ltd
Priority to CN202010878016.8A priority Critical patent/CN111841316A/en
Publication of CN111841316A publication Critical patent/CN111841316A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • 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
    • 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
    • B01D53/8603—Removing sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8659—Removing halogens or halogen compounds
    • B01D53/8662—Organic halogen compounds
    • 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
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/104—Ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/206—Organic halogen compounds
    • B01D2257/2064—Chlorine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/306—Organic sulfur compounds, e.g. mercaptans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/14—Gaseous waste or fumes

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention provides a permanent violet production waste gas high-efficiency treatment system, belongs to the technical field of permanent violet production waste gas treatment, and comprises a high-concentration tail gas pretreatment device and a low-concentration waste gas comprehensive treatment device which are sequentially connected. The high-concentration tail gas from the permanent violet production device firstly enters a high-concentration tail gas pretreatment device, and organic components are in contact reaction with ozone in the presence of a catalyst, are subjected to oxidative decomposition, and are in contact washing with neutralizing liquid alkali. The treated low-concentration tail gas is firstly absorbed by an absorption carbon box, so that organic components in the waste gas are absorbed and removed, the content of the organic components in the waste gas is reduced, and the standard emission is realized. Organic component that is adsorbed by adsorption carbon box is desorption under predetermined desorption temperature, and the desorption gaseous phase gets into catalytic incinerator, and under the effect of catalyst, high temperature oxidation burns, realizes handling up to standard to permanent purple workshop waste gas, and waste gas treatment is efficient, and the solid useless output reduces.

Description

Permanent purple production waste gas high efficiency processing system
Technical Field
The invention belongs to the technical field of permanent violet production waste gas treatment, and particularly relates to a permanent violet production waste gas efficient treatment system.
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, waste gas is mainly generated from two directions, namely high-concentration tail gas containing high-concentration chlorobenzene, o-dichlorobenzene, benzenethiol and other organic substances in a main production device (such as a reaction kettle) and a large amount of unorganized harmful gas generated in the production organization process, particularly during unloading or material leakage. Generally, the high-concentration waste gas generated in the permanent violet RL production process is treated by an activated carbon adsorption method to reduce the content of the waste gasLow content of organic components in 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 an efficient treatment system for permanent violet production waste gas, which is used for comprehensively treating high-concentration tail gas generated in the permanent violet production process and solving the technical problems of low treatment efficiency, poor treatment effect and large amount of solid waste generated in the treatment process of the permanent violet production waste gas in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an efficient treatment system for permanent violet production waste gas comprises a high-concentration tail gas pretreatment device and a low-concentration waste gas comprehensive treatment device which are sequentially connected;
the high-concentration tail gas pretreatment device comprises a catalytic oxidation spraying neutralization tower, and a high-concentration tail gas inlet pipe, an ozone generation assembly and a circulating spraying assembly which are connected to the catalytic oxidation spraying neutralization tower; a circulating alkali tank is arranged at the bottom of the catalytic oxidation spraying neutralization tower, and neutralization liquid alkali is filled in the circulating alkali tank; the outlet of the ozone generating assembly is connected with the circulating alkali tank, and the inlet of the circulating spraying assembly is connected with the circulating alkali tank; the middle part of the catalytic oxidation spraying neutralization tower is provided with a catalytic packing layer, the upper part of the catalytic oxidation spraying neutralization tower is provided with a purified tail gas discharge pipe, the high-concentration tail gas inlet pipe is connected with the catalytic oxidation spraying neutralization tower, an inlet of the high-concentration tail gas inlet pipe is positioned below the catalytic packing layer, and an outlet end of the circulating spraying assembly is arranged above the catalytic packing layer;
the comprehensive treatment device for the discharged waste gas comprises a waste gas feeding main pipe, a plurality of adsorption carbon boxes and a catalytic incinerator, wherein the adsorption carbon boxes and the catalytic incinerator are arranged in parallel; the adsorption carbon box is provided with a waste gas feeding pipe, an adsorption residual gas phase discharge pipe, a desorption agent feeding pipe and a desorption gas phase discharge pipe; the waste gas inlet pipe is connected with the waste gas inlet header pipe, the adsorption residual gas phase discharge pipe is discharged, and the desorption gas phase discharge pipe is connected with the catalytic incinerator.
Preferably, a pretreatment activated carbon box is arranged on the waste gas feeding main pipe.
Preferably, the circulating spray assembly comprises a circulating spray pump, a circulating spray pipe and a spray distributor, wherein an inlet of the circulating spray pump is communicated with the circulating alkali tank, the circulating spray pipe is connected with an outlet of the circulating spray pump, the spray distributor is arranged above the catalytic packing layer, and a feed end of the spray distributor is connected with the circulating spray pipe.
Preferably, the catalytic packing layer comprises a plurality of catalytic packing layers which are sequentially arranged from top to bottom, a spraying interval is arranged between every two adjacent catalytic packing layers, and the spraying distributor is arranged in the spraying interval.
Preferably, the catalytic filler layer comprises a first catalytic filler layer and a second catalytic filler layer which are arranged from bottom to top, and the spraying interval is arranged between the first catalytic filler layer and the second catalytic filler layer; the spraying distributor comprises a first spraying distributor and a second spraying distributor, the first spraying distributor is arranged above the first catalytic filler layer, and the second spraying distributor is arranged above the second catalytic filler layer.
Preferably, the thickness of the first catalytic filler layer is greater than the thickness of the second catalytic filler layer.
Preferably, the waste gas feeding pipe is provided with a waste gas feeding 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.
Preferably, the tail end of the adsorption surplus gas phase discharge pipe is provided with an adsorption surplus gas phase discharge fan, and an outlet of the adsorption surplus gas phase discharge fan is connected with an alkali absorption tower for discharging exhaust gas.
Preferably, the comprehensive treatment device for the discharged exhaust gas comprises at least 3 adsorption carbon boxes arranged in parallel.
Preferably, the catalytic incinerator is provided with an incineration exhaust gas discharge pipe which is connected with the waste gas feeding main pipe.
According to the technical scheme, the invention provides an efficient treatment system for permanent violet production waste gas, which has the beneficial effects that: the method comprises the steps of sequentially arranging the high-concentration tail gas pretreatment device and the low-concentration waste gas comprehensive treatment device, enabling tail gas from a permanent violet production device and containing organic components such as high-concentration chlorobenzene, o-dichlorobenzene and benzenethiol to firstly enter the high-concentration tail gas pretreatment device, enabling the organic components to be in contact reaction with ozone in the presence of a catalyst, and oxidizing and decomposing the organic components into small molecular substances such as carbon dioxide, hydrogen chloride and hydrogen sulfide, wherein acidic substances such as hydrogen chloride and hydrogen sulfide are in contact washing with liquid alkali and are removed from the tail gas. The high-concentration tail gas pretreatment device has the treatment efficiency of about 70 percent, and the tail gas discharged by the tail gas purification discharge pipe contains low-concentration chlorobenzene, o-dichlorobenzene, benzenethiol and other organic components.
The low-concentration tail gas treated by the high-concentration tail gas pretreatment device is firstly adsorbed by the adsorption carbon box, so that organic components in the mixed waste gas are adsorbed and removed, the content of the organic components in the mixed waste gas is reduced, and the standard emission is realized. Organic components adsorbed by the adsorption carbon box are desorbed at a preset desorption temperature to generate a desorption gas phase, the desorption gas phase enters the catalytic incinerator, and is oxidized and incinerated at high temperature under the action of a palladium-carbon catalyst or a platinum-carbon catalyst to decompose the components into substances such as carbon dioxide and the like, so that the up-to-standard treatment of unorganized emission waste gas in a permanent violet production workshop is realized, the waste gas treatment efficiency is high, a large amount of solid wastes cannot be generated, and the treatment process is environment-friendly.
Drawings
FIG. 1 is a pipeline flow diagram of a high-efficiency treatment system for permanent violet production waste gas.
FIG. 2 is a line flow diagram of a high-concentration tail gas pretreatment device.
FIG. 3 is a line flow diagram of an adsorption carbon tank.
In the figure: the permanent violet production waste gas high-efficiency treatment system 10, a high-concentration tail gas pretreatment device 100, a catalytic oxidation spray neutralization tower 110, a circulating alkali tank 111, a catalytic filler layer 112, a first catalytic filler layer 1121, a second catalytic filler layer 1122, a tail gas discharge pipe 113, a purified gas demister 1131, an induced draft fan 1132, a spray interval 114, a high-concentration tail gas inlet pipe 120, an ozone generation assembly 130, a circulating spray assembly 140, a circulating spray pump 141, a circulating spray pipe 142, a spray distributor 143, a first spray distributor 1431, a second spray distributor 1432, a low-concentration waste gas comprehensive treatment device 200, a waste gas inlet main pipe 210, an adsorption carbon box 220, a waste gas inlet pipe 221, a waste gas inlet valve 2211, an adsorption residual gas phase discharge pipe 222, an adsorption residual gas phase discharge valve 2221, an adsorption residual gas phase discharge fan 2222, an exhaust waste gas alkali absorption tower 2223, a desorption agent inlet pipe 223, a desorption agent inlet valve 2231, a desorption agent inlet valve 221, Desorption gas phase discharging pipe 224, desorption gas phase discharging valve 2241, desorption gas phase discharging fan 2242, catalytic incinerator 230, incineration catalyst bed layer 231, incineration tail gas discharging pipe 232 and pretreatment activated carbon box 400.
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 and 2, in one embodiment, a system 10 for efficiently treating exhaust gas from permanent violet production is used to comprehensively treat exhaust gas generated during permanent violet production, including high-concentration exhaust gas from a permanent violet production device and low-concentration exhaust gas from a permanent violet production plant.
The permanent violet production waste gas high-efficiency treatment system 10 comprises a high-concentration tail gas pretreatment device 100 and a low-concentration waste gas comprehensive treatment device 200 which are sequentially connected.
The high-concentration tail gas pretreatment device 100 comprises a catalytic oxidation spray neutralization tower 110, and a high-concentration tail gas inlet pipe 120, an ozone generation assembly 130 and a circulating spray assembly 140 which are connected to the catalytic oxidation spray neutralization tower 110. The bottom of the catalytic oxidation spraying neutralization tower 110 is provided with a circulating alkali tank 111, and the circulating alkali tank 111 is filled with neutralization liquid alkali. The outlet of the ozone generating assembly 130 is connected to the circulating alkali tank 111, ozone generated by the ozone generating assembly 130 is introduced into the circulating alkali tank 111, is partially dissolved in the neutralized liquid alkali in the circulating alkali tank 111, is partially diffused from the neutralized liquid alkali, and is contacted with the permanent violet production tail gas containing organic components such as high-concentration chlorobenzene, o-dichlorobenzene, and benzenethiol introduced into the catalytic oxidation spray neutralization tower 110 through the high-concentration tail gas inlet pipe 120, so that the organic components in the permanent violet production tail gas are oxidized and decomposed to form carbon dioxide, hydrogen chloride, hydrogen sulfide, and the like. The inlet of the circulating spray assembly 140 is connected to the circulating alkali tank 111, the circulating spray assembly 140 circulates the mixed solution of the neutralized liquid alkali and the ozone in the circulating alkali tank 111, so that the mixed solution reversely contacts the permanent violet production tail gas from the upper part of the catalytic oxidation spray neutralization tower 110, on one hand, the ozone is used for further oxidizing and decomposing organic components in the permanent violet production tail gas, and on the other hand, the neutralized alkali liquor (such as sodium hydroxide solution) is used for neutralizing and absorbing acidic substances such as hydrogen chloride, hydrogen sulfide and the like generated after the organic components are oxidized and decomposed, so that the harmlessness of the discharged waste gas is realized.
The catalytic oxidation sprays the middle part of neutralizing tower 110 and is provided with catalytic packing layer 112, and the upper portion is provided with purified tail gas discharge pipe 113, high concentration tail gas intake pipe 120 connects catalytic oxidation sprays neutralizing tower 110, and the entrance is located the below of catalytic packing layer 112, the exit end of circulation spray subassembly 140 sets up in the top of catalytic packing layer 112. The permanent violet production waste gas containing chlorobenzene, o-dichlorobenzene, benzenethiol and other organic components from the permanent violet production device is introduced into the catalytic oxidation spraying neutralization tower 110 through the high-concentration tail gas inlet pipe 120 and flows upwards under the action of pressure difference, a mixture of neutralizing liquid alkali and ozone enters the catalytic oxidation spraying neutralization tower 110 from the outlet end of the circulating spraying assembly 140 and flows downwards under the action of gravity to reversely contact with the permanent violet production waste gas, so that the organic components in the permanent violet production waste gas are subjected to oxidative decomposition, and acidic substances generated by oxidative decomposition of the organic components are neutralized and absorbed.
The comprehensive low-concentration waste gas treatment device 200 comprises a waste gas feeding main pipe 210, a plurality of adsorption carbon boxes 220 and a catalytic incinerator 230, wherein the waste gas feeding main pipe 210 is connected with the purified tail gas discharge pipe 113. The adsorption carbon box 220 is provided with a waste gas feeding pipe 221, an adsorption residual gas phase discharge pipe 222, a desorption agent feeding pipe 223 and a desorption gas phase discharge pipe 224, the waste gas feeding pipe 221 is connected with the waste gas feeding header pipe 210, the adsorption residual gas phase discharge pipe 222 is emptied, and the desorption gas phase discharge pipe 223 is connected with the catalytic incinerator 230.
The unorganized exhaust gas from the permanent violet production workshop contains low-concentration chlorobenzene, o-dichlorobenzene, benzenethiol and other organic components, the low-concentration exhaust gas treated by the high-concentration exhaust gas pretreatment device 100 is firstly adsorbed by the adsorption carbon box 220, the organic components in the mixed exhaust gas are adsorbed and removed, the content of the organic components in the mixed exhaust gas is reduced, and the emission reaching the standard is realized. Organic components adsorbed by the adsorption carbon box 220 are desorbed at a preset desorption temperature to generate a desorption gas phase, the desorption gas phase enters the catalytic incinerator 230, and is subjected to high-temperature oxidation incineration 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 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.
Production practices show that the treatment efficiency of the high-concentration tail gas pretreatment device 100 is about 70%, and tail gas discharged from the tail gas purification discharge pipe contains low-concentration chlorobenzene, o-dichlorobenzene, benzenethiol and other organic components. After further treatment by the low-concentration exhaust gas comprehensive treatment device 200, organic components such as chlorobenzene, o-dichlorobenzene, benzenethiol and the like in the discharged exhaust gas meet the requirements of the atmospheric comprehensive emission standard, and under the condition of a better operation state, organic components such as chlorobenzene, o-dichlorobenzene, benzenethiol and the like in the discharged exhaust gas meet the requirements of the atmospheric comprehensive emission standard in Beijing area.
In a preferred embodiment, in order to further reduce the content of organic components in the exhaust gas, the exhaust gas feeding main pipe 210 is provided with a pretreatment activated carbon box 400. The waste gas is firstly pretreated by the activated carbon adsorption carbon box 400, and after the content of organic components in the inorganically discharged waste gas is preliminarily reduced, advanced treatment is carried out, so that the service cycle of a solid adsorption medium (such as high-quality activated carbon) is prolonged, the use amount of the solid adsorption medium 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. Further, two stages of activated carbon adsorption carbon boxes 400 connected in series are arranged on the unorganized exhaust gas main pipe, so that the treatment efficiency of the unorganized exhaust gas is further improved.
In a specific embodiment, the circulation spray assembly 140 includes a circulation spray pump 141, a circulation spray pipe 142 and a spray distributor 143, an inlet of the circulation spray pump 141 is communicated with the circulation caustic bath 111, the circulation spray pipe 142 is connected to an outlet of the circulation spray pump 141, the spray distributor 143 is disposed above the catalytic filler layer 112, and a feeding end is connected to the circulation spray pipe 142. And pumping the mixture of the neutralization liquid caustic soda and the ozone in the circulation caustic soda tank 111 above the catalytic oxidation spraying neutralization tower 110 by using the circulation spraying pump 141 to realize circulation spraying and washing, so that the ozone is fully contacted with the high-concentration tail gas in the permanent violet production workshop, and simultaneously, acidic gases such as hydrogen chloride and the like generated by oxidative decomposition of organic components such as chlorobenzene and the like are absorbed.
In order to further improve the treatment efficiency of the tail gas, in a specific embodiment, the catalytic filler layer 112 includes a plurality of catalytic filler layers sequentially arranged from top to bottom, a spraying interval 114 is provided between two adjacent catalytic filler layers, and the spraying distributor 143 is disposed in the spraying interval 114. For example, the catalytic filler layer 112 includes a first catalytic filler layer 1121 and a second catalytic filler layer 1122 from bottom to top, and the spraying interval 114 is formed between the first catalytic filler layer 1121 and the second catalytic filler layer 1122. The spray distributor 143 includes a first spray distributor 1431 and a second spray distributor 1432, the first spray distributor 1431 being disposed above the first catalytic packing fraction 1121, the second spray distributor 1432 being disposed above the second catalytic packing fraction 1122. The first catalytic filler layer 1121 positioned at the bottom layer is a main reaction bed layer, the second catalytic filler layer 1122 positioned at the upper layer is a secondary reaction bed layer, most of organic substances contained in the permanent violet production tail gas are oxidized and decomposed in the first catalytic filler layer 1121, and the unoxidized and decomposed part are oxidized and decomposed in the second catalytic filler layer 1122, so that the treatment efficiency of the tail gas is improved.
Further, the thickness of the first catalytic filler layer 1121 is greater than that of the second catalytic filler layer 1122, so that the treatment effect of the permanent violet tail gas is ensured, and the content of organic substances in the permanent violet production tail gas is reduced.
Furthermore, raschig rings are adopted in the support framework of the catalytic filler layer 112 to increase the contact reaction area, so that the oxidative decomposition efficiency of the permanent violet production tail gas is improved, and the content of organic substances in the permanent violet production tail gas is reduced.
In an embodiment, the purified exhaust gas discharge pipe 113 is provided with a purified gas demister 1131 to reduce the water content in the discharged exhaust gas.
In an embodiment, the tail end of the exhaust pipe 113 for purifying the tail gas is connected with an induced draft fan 1132, so as to provide a micro negative pressure, reduce the pressure on the top of the catalytic oxidation spraying neutralization tower 110, and improve the treatment efficiency of the permanent violet production tail gas.
Referring also to fig. 3, in one embodiment, the waste gas feed pipe 221 is provided with a waste gas feed valve 2211. The adsorption surplus gas phase discharge pipe 222 is provided with an adsorption surplus gas phase discharge valve 2221. A desorption agent feed valve 2231 is arranged on the desorption agent feed pipe 223. And a desorption gas phase discharge valve 2241 is arranged on the desorption gas phase discharge pipe 224. The states of the valves are switched to realize the switching between the adsorption state and the desorption state of the adsorption carbon box 220.
Specifically, the integrated low-concentration exhaust gas treatment device 200 includes at least 3 adsorption carbon tanks 220 arranged in parallel. For example, the integrated low concentration exhaust gas treatment device 200 includes 5 adsorption carbon boxes 220 arranged in parallel, and the exhaust gas feeding pipe 221 of each adsorption carbon box 220 is connected to the exhaust gas feeding manifold 210, so that the exhaust gas can simultaneously enter the 5 adsorption carbon boxes 220 arranged in parallel for adsorption, thereby improving the adsorption flux and improving the treatment efficiency of the inorganically discharged exhaust gas. Under normal conditions, 3 or 4 of 5 adsorption carbon boxes 220 are in an adsorption operation state, and the remaining 2 or 1 adsorption carbon boxes are in a desorption operation state, so that the treatment efficiency of the waste gas is guaranteed.
Specifically, after the exhaust gas is collected, the exhaust gas is conveyed into the adsorption carbon box 220 in an adsorption operation state by the exhaust gas feeding main pipe 210, organic components such as chlorobenzene, o-dichlorobenzene, benzenethiol and the like in the inorganically discharged exhaust gas are trapped by a solid adsorption bed layer arranged in the adsorption carbon box 220, and the adsorption residual gas phase is discharged through the adsorption residual gas phase discharge pipe 222 in a standard-reaching manner under the action of an adsorption residual gas phase discharge fan 2222 arranged at the tail end of the adsorption residual gas phase discharge pipe 222. When the adsorption carbon tank 220 in the adsorption operation state is saturated or half saturated, the adsorption carbon tank 220 saturated or half saturated in adsorption is switched off (i.e., the exhaust gas feed valve 2211 and the adsorption residual gas phase discharge valve 2221 of the adsorption carbon tank 220 saturated or half saturated in adsorption are closed), and the adsorption carbon tank 220 ready for use after desorption is put into use (i.e., the exhaust gas feed valve 2211 and the adsorption residual gas phase discharge valve 2221 of the adsorption carbon tank 220 to be put into use are opened).
The desorption agent feed valve 2231 and the desorption gas phase discharge valve 2241 of the adsorption saturated or semi-saturated adsorption carbon box 220 are opened, the organic components adsorbed on the solid adsorption bed layer are desorbed by a high-temperature desorption medium (for example, oxygen-enriched air at a temperature of 90 to 150 ℃), and the desorbed gas phase enters the catalytic incinerator 230 through the desorption gas phase discharge pipe 224 under the action of a desorption gas phase discharge fan 2242 arranged at the tail end of the desorption gas phase discharge pipe 224. An incineration catalyst bed 231 formed by a palladium-carbon catalyst or a platinum-carbon catalyst is arranged in the catalytic incinerator 230, 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 230 is higher than 600 ℃), so that harmless treatment of 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 comprehensive treatment device 200 for low-concentration waste gas realizes the treatment of reaching the standard of the unorganized discharged waste gas in the permanent violet production workshop, has high waste gas treatment efficiency, does not produce a large amount of solid waste, and has environment-friendly treatment process.
In a preferred embodiment, in order to further reduce the content of organic components in the discharged tail gas and achieve emission up to standard, the catalytic incinerator 230 has an incineration tail gas discharge pipe 232, and the incineration tail gas discharge pipe 232 is connected to the waste gas feed pipe 221. That is, the incineration exhaust gas discharge pipe 232 is connected to the front end of the exhaust gas feeding main pipe 210, and the desorbed gas phase is oxidized and incinerated at high temperature by the catalytic incinerator 230 to be 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 from the catalytic incinerator is mixed with the gas phase from the exhaust gas feeding main pipe 210 and is adsorbed by the adsorption carbon box 220 again, so that the content of the organic components in the exhaust gas is further reduced, and the environmental protection pressure is reduced.
Further, in order to reduce the content of acid-washing substances (such as hydrogen chloride, hydrogen sulfide, and the like) in the discharged tail gas, an adsorption residual gas phase discharge fan 2222 is arranged at the end of the adsorption residual gas phase discharge pipe 222, and an outlet of the adsorption residual gas phase discharge fan 2222 is connected to a discharged exhaust gas alkali absorption tower 2223.
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. The efficient treatment system for the permanent violet production waste gas is characterized by comprising a high-concentration tail gas pretreatment device and a low-concentration waste gas comprehensive treatment device which are sequentially connected;
the high-concentration tail gas pretreatment device comprises a catalytic oxidation spraying neutralization tower, and a high-concentration tail gas inlet pipe, an ozone generation assembly and a circulating spraying assembly which are connected to the catalytic oxidation spraying neutralization tower; a circulating alkali tank is arranged at the bottom of the catalytic oxidation spraying neutralization tower, and neutralization liquid alkali is filled in the circulating alkali tank; the outlet of the ozone generating assembly is connected with the circulating alkali tank, and the inlet of the circulating spraying assembly is connected with the circulating alkali tank; the middle part of the catalytic oxidation spraying neutralization tower is provided with a catalytic packing layer, the upper part of the catalytic oxidation spraying neutralization tower is provided with a purified tail gas discharge pipe, the high-concentration tail gas inlet pipe is connected with the catalytic oxidation spraying neutralization tower, an inlet of the high-concentration tail gas inlet pipe is positioned below the catalytic packing layer, and an outlet end of the circulating spraying assembly is arranged above the catalytic packing layer;
the low-concentration waste gas comprehensive treatment device comprises a waste gas feeding main pipe, a plurality of adsorption carbon boxes and a catalytic incinerator, wherein the adsorption carbon boxes and the catalytic incinerator are arranged in parallel; the adsorption carbon box is provided with a waste gas feeding pipe, an adsorption residual gas phase discharge pipe, a desorption agent feeding pipe and a desorption gas phase discharge pipe; the waste gas inlet pipe is connected with the waste gas inlet header pipe, the adsorption residual gas phase discharge pipe is discharged, and the desorption gas phase discharge pipe is connected with the catalytic incinerator.
2. The permanent violet production waste gas high efficiency treatment system of claim 1, wherein the waste gas feeding main pipe is provided with a pre-treatment activated carbon box.
3. The permanent violet production waste gas high-efficiency treatment system of claim 1, wherein the circulating spray assembly comprises a circulating spray pump, a circulating spray pipe and a spray distributor, an inlet of the circulating spray pump is communicated with the circulating alkali tank, the circulating spray pipe is connected with an outlet of the circulating spray pump, the spray distributor is arranged above the catalytic packing layer, and a feed end of the spray distributor is connected with the circulating spray pipe.
4. The permanent violet production waste gas high-efficiency treatment system of claim 3, wherein the catalytic filler layer comprises a plurality of catalytic filler layers arranged from top to bottom, a spraying interval is arranged between every two adjacent catalytic filler layers, and the spraying distributor is arranged in the spraying interval.
5. The permanent violet production waste gas high-efficiency treatment system of claim 4, wherein the catalytic filler layer comprises a first catalytic filler layer and a second catalytic filler layer which are arranged from bottom to top, and the spraying interval is arranged between the first catalytic filler layer and the second catalytic filler layer; the spraying distributor comprises a first spraying distributor and a second spraying distributor, the first spraying distributor is arranged above the first catalytic filler layer, and the second spraying distributor is arranged above the second catalytic filler layer.
6. The permanent violet process exhaust gas high efficiency treatment system of claim 5, wherein the first catalytic filler layer has a thickness greater than the thickness of the second catalytic filler layer.
7. The high-efficiency treatment system for the exhaust gas from the permanent violet production according to claim 1, wherein the exhaust gas feeding pipe is provided with an exhaust gas feeding 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 permanent violet production waste gas high efficiency treatment system of claim 1, wherein an adsorption residual gas phase discharge fan is arranged at the tail end of the adsorption residual gas phase discharge pipe, and an outlet of the adsorption residual gas phase discharge fan is connected with an externally discharged waste gas alkali absorption tower.
9. The permanent violet production waste gas high efficiency treatment system of claim 1, wherein the low concentration waste gas comprehensive treatment device comprises at least 3 adsorption carbon boxes arranged in parallel.
10. The permanent violet production waste gas high efficiency treatment system of claim 1, wherein the catalytic incinerator is provided with an incineration exhaust gas discharge pipe, and the incineration exhaust gas discharge pipe is connected with the waste gas feeding main pipe.
CN202010878016.8A 2020-08-27 2020-08-27 Permanent purple production waste gas high efficiency processing system Pending CN111841316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010878016.8A CN111841316A (en) 2020-08-27 2020-08-27 Permanent purple production waste gas high efficiency processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010878016.8A CN111841316A (en) 2020-08-27 2020-08-27 Permanent purple production waste gas high efficiency processing system

Publications (1)

Publication Number Publication Date
CN111841316A true CN111841316A (en) 2020-10-30

Family

ID=72967993

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010878016.8A Pending CN111841316A (en) 2020-08-27 2020-08-27 Permanent purple production waste gas high efficiency processing system

Country Status (1)

Country Link
CN (1) CN111841316A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114288804A (en) * 2021-11-26 2022-04-08 东营市利民无害化处理有限公司 Process for treating peculiar smell generated by animals died of illness

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114288804A (en) * 2021-11-26 2022-04-08 东营市利民无害化处理有限公司 Process for treating peculiar smell generated by animals died of illness

Similar Documents

Publication Publication Date Title
CN104003504B (en) A kind of organic wastewater with difficult degradation thereby catalytic ozonation treatment unit and technique
CN105964136A (en) Organic exhaust gas degradation method and device
CN106178873B (en) Waste gas processing method and waste gas treatment equipment in a kind of production of sodium hydrosulfite
CN204582934U (en) A kind for the treatment of apparatus of organic exhaust gas
CN104815536A (en) Organic waste gas processing method and processing device
CN107715691A (en) A kind of photocatalysis aqueous vapor treating column
CN205055792U (en) Volatility organic gas's absorption purifier
CN111841316A (en) Permanent purple production waste gas high efficiency processing system
CN201558664U (en) Apparatus for processing malodorous gas in pharmaceutical industry
CN212283565U (en) Permanent purple production waste gas high efficiency processing system
CN101708417A (en) Device for treating malodorous gas in pharmaceutical industry
CN108786419A (en) A variety of exhaust gas total systems
CN105664686A (en) Combined type purification device for low-concentration vulcanization waste gas
CN105709577A (en) Refuse leachate malodorous gas purification complete device and refuse leachate malodorous gas purification method
CN110559827B (en) Treatment process of papermaking waste gas
CN105536525A (en) Photoinduction catalytic oxidation exhaust purification process and device
CN205550035U (en) Photoinduction catalytic oxidation's exhaust purification technology and device
CN216321080U (en) Device suitable for acid-base waste gas treatment and ozonolysis organic waste gas
CN206508775U (en) A kind of photocatalysis plasma integral waste gases purifier
CN202569943U (en) Device for treating hydrogen sulfide in exhaust gas
CN102824831B (en) The box Photoreactor of ultraviolet photolysis process waste gas and method thereof
CN205627572U (en) Landfill leachate foul gas purifies integrated equipment
CN212215087U (en) Super oxidation exhaust-gas treatment system of spraying method
CN213253603U (en) Permanent purple workshop inorganization discharges waste gas high efficiency processing system
CN107469586A (en) A kind of plasma organic exhaust gas purifying system integrated with biofilter and method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination