A treatment process for chlorobenzene organic waste gas

Abstract

This invention discloses a treatment process for chlorobenzene-based organic waste gas, belonging to the field of waste gas treatment technology. The chlorobenzene-based organic waste gas is fed into a regenerative thermal oxidizer reactor, where it is heated and oxidized to generate CO2, H2O, HCl gas, and trace amounts of dioxins. A water scrubbing tower and an alkaline scrubbing tower are connected in series at the exhaust outlet to remove hydrogen chloride gas, and a carbon fiber adsorption system is installed at the outlet of the alkaline scrubbing tower to remove dioxins. Carbon fibers are ultrasonically impregnated in a phosphoric acid solution to obtain chemically impregnated modified carbon fibers. These chemically impregnated modified carbon fibers are then impregnated in a silane coupling agent solution to obtain KH560 modified carbon fibers. The KH560 modified carbon fibers are then added to an organosilicon resin solution and stirred until homogeneous. A catalyst is added and stirred thoroughly, followed by heating and drying to obtain a carbon fiber-organosilicon resin composite material. This carbon fiber-organosilicon resin composite material is then impregnated in a dopamine-Tris hydrochloride solution, removed, and dried to obtain a polydopamine-modified carbon fiber-organosilicon resin adsorbent material.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology, specifically relating to a treatment process for chlorobenzene-based organic waste gas. Background Technology

[0002] Nitrochlorobenzene is an important basic organic chemical raw material with numerous downstream derivatives. It is widely used in many industries such as pesticides, chemicals, dyes, pharmaceuticals, auxiliaries, and fragrances. In recent years, my country's o-nitrochlorobenzene industry has developed rapidly, and its export volume has also increased significantly, which has greatly boosted the development of my country's organic intermediate products.

[0003] The development of nitrochlorobenzene and its derivatives exhibits the following characteristics: First, upstream and downstream enterprises interact, with upstream extending downstream processing and downstream developing connectors (nitrochlorobenzene), all building their own product chains; second, both upstream and downstream enterprises are expanding capacity simultaneously during the product chain building process, with apparent nitrochlorobenzene capacity expansion being significant. Market competition for nitrochlorobenzene is not only about the product itself but also about the comprehensive manufacturing capabilities of enterprises, while simultaneously requiring clean production processes.

[0004] After nitration to obtain the initial product, nitrochlorobenzene is separated and purified by distillation-crystallization. In the distillation section, chlorobenzene is often used as the working fluid for cooling in the vacuum pump, thus generating tail gas containing chlorobenzene and nitrochlorobenzene. Due to its high freezing point and low volatility, the content of nitrochlorobenzene in the tail gas is limited. The main pollutant in the workshop tail gas is chlorobenzene, with a small amount of nitrochlorobenzene mixed in. This tail gas has a strong odor and is highly toxic, requiring appropriate treatment to meet emission standards. The company has successively used carbon fiber adsorption and resin adsorption to treat the tail gas; however, these methods require frequent switching and steam desorption to ensure treatment effectiveness, and the adsorption materials need to be replaced regularly, resulting in high costs. Summary of the Invention

[0005] The purpose of this invention is to provide a treatment process for chlorobenzene-based organic waste gas, in which the chlorobenzene-based organic waste gas is fed into a three-chamber regenerative thermal oxidation reactor, where the waste gas is heated and oxidized to generate CO2, H2O, HCl gas, and trace amounts of dioxins, thereby solving the problems of steam washing and frequent replacement of adsorption materials when directly using carbon fiber to adsorb waste gas.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A process for treating chlorobenzene-based organic waste gas involves feeding the waste gas into a regenerator chamber A of an oxidation reactor. The waste gas then reaches the top oxidation chamber, where it is heated and oxidized to produce CO2, H2O, HCl gas, and dioxins. The high-temperature oxidized gas then passes through a regenerator chamber B, which absorbs heat as the gas passes through, providing preheating for the next waste gas treatment cycle. A qualified gas is introduced into regenerator chamber C for cleaning. The three regenerator chambers continuously circulate at different treatment stages. A water scrubbing tower and an alkaline scrubbing tower are connected in series at the exhaust outlet of the oxidation reactor to remove HCl gas. A carbon fiber adsorption system is installed at the outlet of the alkaline scrubbing tower to remove dioxins.

[0008] The method for preparing polydopamine-modified carbon fiber-organic silicone resin adsorbent material for carbon fiber adsorption systems is characterized by the following steps:

[0009] (1) Chemical impregnation modification:

[0010] Add 20-30 parts by weight of carbon fiber at a ratio of 1:10 to a 1-2 mol / L phosphoric acid solution, and perform ultrasonic impregnation modification at 40-60℃ for 20-30 min. Remove the carbon fiber and dry it in a drying oven at 40-50℃ to obtain chemically impregnated modified carbon fiber.

[0011] (2) KH560 modified carbon fiber:

[0012] Mix silane coupling agent, deionized water, and methanol in a volume ratio of 1:1:20 and stir until homogeneous to obtain a silane coupling agent solution.

[0013] Add the chemically impregnated modified carbon fiber obtained in step (1) to a silane coupling agent solution at a ratio of 1:10, control the pH to neutral with glacial acetic acid, impregnate for 1-2 hours, take it out and clean it with deionized water, and dry it in a drying oven at 70-80℃ to obtain KH560 modified carbon fiber.

[0014] (3) Carbon fiber-silicone resin composite material:

[0015] Add the KH560 modified carbon fiber obtained in step (2) to the organosilicon resin solution at a ratio of 1:10, stir evenly, add the catalyst and stir thoroughly, heat and react at 80-90℃ for 1-2 hours, then heat to 140-150℃ for drying to obtain carbon fiber-organosilicon resin composite material.

[0016] (4) Polydopamine-modified carbon fiber-organic silicone resin adsorbent material:

[0017] The carbon fiber-organic silicone resin composite material obtained in step (3) was immersed in hydrochloric acid dopamine-Tris solution for 2-3 hours, then removed and dried to obtain polydopamine modified carbon fiber-organic silicone resin adsorbent material.

[0018] Furthermore, in step (3), the organosilicon resin solution refers to a 1 mol / L organosilicon resin toluene solution;

[0019] Furthermore, in step (3), the catalyst is any one of the metal catalysts platinum, palladium, and nickel, and the amount of catalyst added is 1% of the mass of KH560 modified carbon fiber.

[0020] Furthermore, in step (4), the hydrochloric acid dopamine-Tris solution is a mixture of 0.01 mol / L Tris and 2 g / L dopamine.

[0021] The beneficial effects of this invention are:

[0022] (1) This invention addresses the needs of energy conservation and environmental protection in workshop production. It uses a three-chamber regenerative thermal oxidation reactor as the main equipment to treat chlorobenzene organic waste gas. An oxidation chamber is set at the top, and each of the three regenerative chambers is equipped with an air inlet, an exhaust outlet, and a clean gas inlet. Each regenerative chamber switches back and forth between three processes: exhaust heat storage, air inlet heat release, and qualified gas cleaning, to ensure that there are no organic substances remaining in the chamber that will affect the next treatment.

[0023] The gas exiting the reactor contains HCl gas and trace amounts of highly toxic dioxins. To ensure compliance with emission standards, a water scrubbing tower and an alkaline scrubbing tower are connected in series at the exhaust outlet of the oxidation reactor to remove the small amount of HCl gas produced by the oxidation reaction. A carbon fiber adsorption system is installed at the outlet of the alkaline scrubbing tower to remove the trace amounts of highly toxic dioxins produced by the high-temperature oxidation of chlorobenzene, ensuring that the exhaust gas is discharged in compliance with national standards.

[0024] (2) The carbon fiber is modified by chemical modification. Phosphoric acid is used as a modifier to impregnate the carbon fiber, which corrodes the pores on the surface of the carbon fiber, making the pores of the carbon fiber develop, increasing the specific surface area, and increasing the number of mesopores and micropores. Phosphoric acid treatment can increase the functional groups on the surface of the carbon fiber, thereby improving its adsorption performance.

[0025] KH560 is a silane coupling agent containing epoxy groups, which can chemically react with the functional groups on the surface of carbon fibers, further improving the surface properties of the carbon fibers. The following explains why phosphoric acid impregnated carbon fibers modified with KH560 improve waste gas treatment efficiency:

[0026] Enhanced surface activity: Phosphoric acid impregnation can increase the polar functional groups on the carbon fiber surface. The epoxy groups of KH560 can react with these functional groups to further increase surface activity and improve the adsorption capacity for pollutants such as VOCs.

[0027] Improved pore structure: KH560 modification improves the pore structure of carbon fibers, increasing the ratio of micropores to mesopores, thereby improving the adsorption efficiency for larger molecular pollutants.

[0028] Enhanced chemisorption: KH560 modification forms additional chemisorption sites on the carbon fiber surface, enhancing the chemisorption of pollutants such as VOCs, dioxins, and total hydrocarbons.

[0029] Increased surface roughness: KH560 modification increases the surface roughness of carbon fibers, providing more physical adsorption sites for pollutants.

[0030] Synergistic effect: Phosphoric acid modification and KH560 modification produce a synergistic effect. The polar functional groups provided by phosphoric acid modification work together with the epoxy groups of KH560 to improve the overall adsorption performance of carbon fiber.

[0031] (3) The use of carbon fiber and organosilicon resin composites to treat waste gas mainly utilizes the temperature resistance of organosilicon resin and the adsorption performance of carbon fiber. The following are the reasons why this composite material reduces the removal rate of VOCs, dioxins and total hydrocarbons in the outlet waste gas:

[0032] Chemical stability: Organosilicon resin has good chemical stability, which can resist the erosion of chemicals in exhaust gas and protect carbon fiber from chemical degradation.

[0033] Adsorption performance: Carbon fiber has a high specific surface area and porous structure, which helps to adsorb pollutants in exhaust gas, including VOCs, dioxins and total hydrocarbons.

[0034] Synergistic effect: The combination of organosilicon resin and carbon fiber produces a synergistic effect, and the combination of the two can improve the removal efficiency of pollutants in exhaust gas by the composite material.

[0035] Interface reinforcement: The surface wettability and roughness of carbon fibers play a key role in the interface reinforcement of silicone resin composites, which helps to improve the mechanical properties and adsorption capacity of the composites.

[0036] (4) Polydopamine was used to modify the surface of carbon fiber-organic silicone resin composites. After treatment with phosphoric acid and KH560, the pores and grooves on the surface of the carbon fiber were more conducive to the deposition of dopamine. The deposition of dopamine on the surface of carbon fiber-organic silicone resin composites helps to reduce the removal rate of VOCs (volatile organic compounds), dioxins, and total hydrocarbons in the exhaust gas. The reasons include:

[0037] Adsorption: Polydopamine has abundant functional groups (such as phenolic hydroxyl and amino groups), which can enhance the adsorption capacity of pollutants such as VOCs, dioxins, and total hydrocarbons through hydrogen bonding, π-π stacking, electrostatic interactions, etc.

[0038] Catalytic performance: Polydopamine has certain catalytic properties, which can catalyze the oxidation and decomposition of certain pollutants in waste gas, thereby reducing their concentration.

[0039] Increased surface roughness: Dopamine deposition increases the surface roughness of materials, providing more adsorption sites for pollutants in exhaust gas, thereby improving removal efficiency.

[0040] Synergistic effect: The deposition of dopamine has a synergistic effect with carbon fiber and silicone resin, which together improves the removal capacity of pollutants in exhaust gas. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1

[0043] A process for treating chlorobenzene-based organic waste gas involves feeding the waste gas into a regenerator chamber A of an oxidation reactor. The waste gas then reaches the top oxidation chamber, where it is heated and oxidized to produce CO2, H2O, HCl gas, and dioxins. The high-temperature oxidized gas then passes through a regenerator chamber B, which absorbs heat as the gas passes through, providing preheating for the next waste gas treatment cycle. A qualified gas is introduced into regenerator chamber C for cleaning. The three regenerator chambers continuously circulate at different treatment stages. A water scrubbing tower and an alkaline scrubbing tower are connected in series at the exhaust outlet of the oxidation reactor to remove HCl gas. A carbon fiber adsorption system is installed at the outlet of the alkaline scrubbing tower to remove dioxins.

[0044] The method for preparing polydopamine-modified carbon fiber-organic silicone resin adsorbent material for carbon fiber adsorption systems is characterized by the following steps:

[0045] (1) Chemical impregnation modification:

[0046] 20 parts by weight of carbon fiber were added to a 1 mol / L phosphoric acid solution at a ratio of 1:10, and ultrasonically impregnated at 40℃ for 20 min. The mixture was then removed and dried in a 40℃ drying oven to obtain chemically impregnated modified carbon fiber.

[0047] (2) KH560 modified carbon fiber:

[0048] Mix silane coupling agent, deionized water, and methanol in a volume ratio of 1:1:20 and stir until homogeneous to obtain a silane coupling agent solution.

[0049] Add the chemically impregnated modified carbon fiber obtained in step (1) to a silane coupling agent solution at a ratio of 1:10, control the pH to neutral with glacial acetic acid, impregnate for 1 hour, take it out and clean it with deionized water, and dry it in a drying oven at 70℃ to obtain KH560 modified carbon fiber.

[0050] (3) Carbon fiber-silicone resin composite material:

[0051] Add the KH560 modified carbon fiber obtained in step (2) at a ratio of 1:10 to a 1 mol / L organosilicon resin toluene solution, stir evenly, add the catalyst platinum (the amount added is 1% of the mass of KH560 modified carbon fiber) and stir thoroughly. After heating and reacting at 80℃ for 1 h, heat to 140℃ for drying to obtain carbon fiber-organosilicon resin composite material.

[0052] (4) Polydopamine-modified carbon fiber-organic silicone resin adsorbent material:

[0053] The carbon fiber-organic silicone resin composite material obtained in step (3) was immersed in hydrochloric acid dopamine-Tris solution for 2 hours, then removed and dried to obtain polydopamine modified carbon fiber-organic silicone resin adsorbent material.

[0054] Furthermore, in step (4), the hydrochloric acid dopamine-Tris solution is a mixture of 0.01 mol / L Tris and 2 g / L dopamine.

[0055] Example 2

[0056] A process for treating chlorobenzene-based organic waste gas involves feeding the waste gas into a regenerator chamber A of an oxidation reactor. The waste gas then reaches the top oxidation chamber, where it is heated and oxidized to produce CO2, H2O, HCl gas, and dioxins. The high-temperature oxidized gas then passes through a regenerator chamber B, which absorbs heat as the gas passes through, providing preheating for the next waste gas treatment cycle. A qualified gas is introduced into regenerator chamber C for cleaning. The three regenerator chambers continuously circulate at different treatment stages. A water scrubbing tower and an alkaline scrubbing tower are connected in series at the exhaust outlet of the oxidation reactor to remove HCl gas. A carbon fiber adsorption system is installed at the outlet of the alkaline scrubbing tower to remove dioxins.

[0057] The method for preparing polydopamine-modified carbon fiber-organic silicone resin adsorbent material for carbon fiber adsorption systems is characterized by the following steps:

[0058] (1) Chemical impregnation modification:

[0059] 30 parts by weight of carbon fiber were added to a 2 mol / L phosphoric acid solution at a ratio of 1:10, and ultrasonically impregnated at 60℃ for 30 min. The mixture was then removed and dried in a 50℃ drying oven to obtain chemically impregnated modified carbon fiber.

[0060] (2) KH560 modified carbon fiber:

[0061] Mix silane coupling agent, deionized water, and methanol in a volume ratio of 1:1:20 and stir until homogeneous to obtain a silane coupling agent solution.

[0062] Add the chemically impregnated modified carbon fiber obtained in step (1) to a silane coupling agent solution at a ratio of 1:10, control the pH to neutral with glacial acetic acid, impregnate for 2 hours, take it out and clean it with deionized water, and dry it in an 80℃ drying oven to obtain KH560 modified carbon fiber.

[0063] (3) Carbon fiber-silicone resin composite material:

[0064] Add the KH560 modified carbon fiber obtained in step (2) at a ratio of 1:10 to a 1 mol / L organosilicon resin toluene solution, stir evenly, add the catalyst palladium (the amount added is 1% of the mass of KH560 modified carbon fiber) and stir thoroughly. After heating and reacting at 90℃ for 2 hours, heat to 150℃ and dry to obtain carbon fiber-organosilicon resin composite material.

[0065] (4) Polydopamine-modified carbon fiber-organic silicone resin adsorbent material:

[0066] The carbon fiber-organic silicone resin composite material obtained in step (3) was immersed in hydrochloric acid dopamine-Tris solution for 3 hours, then removed and dried to obtain polydopamine modified carbon fiber-organic silicone resin adsorbent material.

[0067] Furthermore, in step (4), the hydrochloric acid dopamine-Tris solution is a mixture of 0.01 mol / L Tris and 2 g / L dopamine.

[0068] Example 3

[0069] A process for treating chlorobenzene-based organic waste gas involves feeding the waste gas into a regenerator chamber A of an oxidation reactor. The waste gas then reaches the top oxidation chamber, where it is heated and oxidized to produce CO2, H2O, HCl gas, and dioxins. The high-temperature oxidized gas then passes through a regenerator chamber B, which absorbs heat as the gas passes through, providing preheating for the next waste gas treatment cycle. A qualified gas is introduced into regenerator chamber C for cleaning. The three regenerator chambers continuously circulate at different treatment stages. A water scrubbing tower and an alkaline scrubbing tower are connected in series at the exhaust outlet of the oxidation reactor to remove HCl gas. A carbon fiber adsorption system is installed at the outlet of the alkaline scrubbing tower to remove dioxins.

[0070] The method for preparing polydopamine-modified carbon fiber-organic silicone resin adsorbent material for carbon fiber adsorption systems is characterized by the following steps:

[0071] (1) Chemical impregnation modification:

[0072] 25 parts by weight of carbon fiber were added to a 1.5 mol / L phosphoric acid solution at a ratio of 1:10, and ultrasonically impregnated at 50°C for 25 min. The mixture was then removed and dried in a 45°C drying oven to obtain chemically impregnated modified carbon fiber.

[0073] (2) KH560 modified carbon fiber:

[0074] Mix silane coupling agent, deionized water, and methanol in a volume ratio of 1:1:20 and stir until homogeneous to obtain a silane coupling agent solution.

[0075] Add the chemically impregnated modified carbon fiber obtained in step (1) to a silane coupling agent solution at a ratio of 1:10, control the pH to neutral with glacial acetic acid, impregnate for 1.5 h, take it out and clean it with deionized water, and dry it in a drying oven at 75 ℃ to obtain KH560 modified carbon fiber.

[0076] (3) Carbon fiber-silicone resin composite material:

[0077] Add the KH560 modified carbon fiber obtained in step (2) at a ratio of 1:10 to a 1 mol / L organosilicon resin toluene solution, stir evenly, add the catalyst nickel (the amount added is 1% of the mass of KH560 modified carbon fiber), stir thoroughly, heat and react at 85℃ for 1.5 h, and then heat to 145℃ for drying to obtain carbon fiber-organosilicon resin composite material.

[0078] (4) Polydopamine-modified carbon fiber-organic silicone resin adsorbent material:

[0079] The carbon fiber-organic silicone resin composite material obtained in step (3) was immersed in hydrochloric acid dopamine-Tris solution for 2.5 h, then removed and dried to obtain polydopamine modified carbon fiber-organic silicone resin adsorbent material.

[0080] Furthermore, in step (4), the hydrochloric acid dopamine-Tris solution is a mixture of 0.01 mol / L Tris and 2 g / L dopamine.

[0081] Comparative Example 1

[0082] Compared with Example 3, the chlorobenzene organic waste gas was not sent into the oxidation reactor, but was directly treated by the carbon fiber adsorption system, and the remaining steps were the same.

[0083] Comparative Example 2

[0084] Compared with Example 3, step (1) is omitted, and the remaining steps are the same.

[0085] Comparative Example 3

[0086] Compared with Example 3, step (2) is omitted, and the remaining steps are the same.

[0087] Comparative Example 4

[0088] Compared with Example 3, step (3) is omitted, while the remaining steps are the same.

[0089] Comparative Example 5

[0090] Compared with Example 3, step (4) is omitted, and the remaining steps are the same.

[0091] The waste gases treated in Examples 1-3 and Comparative Examples 1-5 were tested according to the method in Gas Chromatography for the Determination of Chlorobenzene Compounds in Waste Gas from Stationary Sources (HJ1079-2019) of the People's Republic of China. The results are shown in Table 1.

[0092] Table 1

[0093]

[0094] As can be seen from Table 1, compared with Comparative Example 1 and Example 3, the waste gas was not sent into the oxidation reactor and was directly treated by the carbon fiber adsorption system, resulting in a worse waste gas treatment effect.

[0095] Compared with Comparative Example 2 and Example 3, the carbon fiber was not chemically impregnated with phosphoric acid solution, resulting in a worse exhaust gas treatment effect.

[0096] Compared with Comparative Example 3, the carbon fiber was not modified with KH560 silane coupling agent, resulting in a worse exhaust gas treatment effect.

[0097] Compared with Comparative Example 4 and Example 3, the carbon fiber did not react with the organosilicon resin toluene solution and the catalyst nickel, resulting in a worse exhaust gas treatment outcome.

[0098] Compared with Comparative Example 5 and Example 3, the carbon fiber-silicone resin composite material was not impregnated with dopamine-Tris hydrochloride solution, resulting in poorer exhaust gas treatment.

[0099] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0100] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A process for treating chlorobenzene-based organic waste gas, characterized in that, A method for preparing polydopamine-modified carbon fiber-organic silicone resin adsorbent materials for carbon fiber adsorption systems includes the following steps: (1) Chemical impregnation modification: Add 20-30 parts by weight of carbon fiber at a ratio of 1:10 to a 2 mol / L phosphoric acid solution, and perform ultrasonic impregnation modification at 60℃ for 30 min. Remove the carbon fiber and dry it in a 50℃ drying oven to obtain chemically impregnated modified carbon fiber. (2) KH560 modified carbon fiber: Mix silane coupling agent, deionized water, and methanol in a volume ratio of 1:1:20 and stir until homogeneous to obtain a silane coupling agent solution. Add the chemically impregnated modified carbon fiber obtained in step (1) to a silane coupling agent solution at a ratio of 1:10, control the pH to neutral with glacial acetic acid, impregnate for 2 hours, take it out and clean it with deionized water, and dry it in an 80℃ drying oven to obtain KH560 modified carbon fiber. (3) Carbon fiber-organic silicone resin composite material: Add the KH560 modified carbon fiber obtained in step (2) to the organosilicon resin solution at a ratio of 1:10, stir evenly, add the catalyst and stir thoroughly, heat at 80-90℃ for 1-2 hours, then heat to 140-150℃ for drying to obtain carbon fiber-organosilicon resin composite material. (4) Polydopamine-modified carbon fiber-organic silicone resin adsorbent material: The carbon fiber-organic silicone resin composite material obtained in step (3) was immersed in hydrochloric acid dopamine-Tris solution at a ratio of 1:10 for 2-3 hours, then removed and dried to obtain polydopamine modified carbon fiber-organic silicone resin adsorbent material. Chlorobenzene-based organic waste gas is fed into regenerator chamber A of the oxidation reactor. The waste gas then reaches the top oxidation chamber, where it is heated and oxidized to produce CO2, H2O, HCl gas, and dioxins. The high-temperature gas after oxidation passes through regenerator chamber B, which absorbs heat as the gas passes through, providing preheating for the next waste gas treatment. Qualified gas is introduced into regenerator chamber C for cleaning. The three regenerator chambers circulate continuously at different treatment stages. A water scrubbing tower and an alkaline scrubbing tower are connected in series at the exhaust outlet of the oxidation reactor to remove HCl gas. A carbon fiber adsorption system is installed at the outlet of the alkaline scrubbing tower to remove dioxins.

2. The treatment process for chlorobenzene-based organic waste gas according to claim 1, characterized in that, In step (3), the organosilicon resin solution refers to a 1 mol / L organosilicon resin toluene solution, and the catalyst is any one of the metal catalysts platinum, palladium, and nickel. The amount of catalyst added is 1% of the mass of KH560 modified carbon fiber.

3. The treatment process for chlorobenzene-based organic waste gas according to claim 1, characterized in that, The hydrochloric acid dopamine-Tris solution mentioned in step (4) is a mixture of 0.01 mol / L Tris and 2 g / L dopamine.

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