A tail gas treatment device for modified carbon black production

Abstract

This utility model belongs to the field of carbon black production technology and discloses a tail gas treatment device for modified carbon black production. It includes a spray absorption tower connected to the tail gas outlet of a reaction vessel, a packed absorption tower connected to the tail gas outlets of a neutralization vessel and an acid treatment vessel respectively, a condenser tower, a zeolite rotor concentration system, and an RTO incinerator connected to the tail gas outlet of a polymerization reactor, and a condenser connected to the tail gas outlet of a filter. The tail gas outlets of the spray absorption tower, packed absorption tower, RTO incinerator, and condenser are all connected sequentially to an oxidation scrubbing tower, a filter, and an online monitoring system via pipelines. The tail gas outlet of the online monitoring system is connected to a chimney and an activated carbon emergency adsorption tank respectively. This utility model has a reasonable design, good treatment effect, and ensures environmental safety.

Description

Technical Field

[0001] This utility model relates to the field of carbon black production technology, specifically to a tail gas treatment device for modified carbon black production. Background Technology

[0002] With the research on carbon black, its application fields are constantly expanding. Currently, carbon black is commonly used in rubber products, plastics industry, coatings and inks, chemical fibers and leather, electronic components, metallurgy and carbon industry, new energy industry, etc. However, different industries have different requirements for its performance, so it is necessary to modify it to meet the requirements of different industries. One type of modified carbon black is obtained by oxidizing the surface of carbon black with sodium ferrate under alkaline conditions, followed by in-situ polymerization of aniline monomers in an acidic environment to form a coating layer, ultimately obtaining modified carbon black with both high antistatic properties and excellent dispersibility. In the preparation process of this modified carbon black, because acids, alkalis, inert gases and organic reagents are used in different production processes, different types of tail gases are generated in different processes. If they are treated uniformly, the workload is large and the treatment effect is poor. Therefore, it is necessary to treat them separately first and then centrally to treat the tail gases generated in the production process simply and effectively. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a tail gas treatment device for modified carbon black production, which is reasonably designed, has a good treatment effect, and ensures environmental safety.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A tail gas treatment device for modified carbon black production includes a spray absorption tower connected to the tail gas outlet of a reactor, a packed absorption tower connected to the tail gas outlets of a neutralization reactor and an acid treatment reactor respectively, a condenser tower, a zeolite rotor concentration system, and an RTO incinerator connected to the tail gas outlet of a polymerization reactor, and a condenser connected to the tail gas outlet of a filter. The tail gas outlets of the spray absorption tower, the packed absorption tower, the RTO incinerator, and the condenser are all connected in sequence to an oxidation scrubbing tower, a filter, and an online detection system via pipelines. The tail gas outlet of the online detection system is connected to a chimney and an activated carbon emergency adsorption tank respectively.

[0006] Preferably, the spray absorption tower is an acid washing tower. It sprays 5% dilute sulfuric acid internally to absorb the NaOH contained in the exhaust gas.

[0007] Preferably, the packed absorber has two stages: a bottom alkaline washing layer and a top activated carbon adsorption layer. The exhaust gas first enters the bottom layer, where it passes through a 5% NaOH solution to neutralize the HCl. Then, the exhaust gas rises into the activated carbon adsorption layer to continue adsorbing HCl.

[0008] Preferably, the condensation tower is equipped with a heat exchange device. The exhaust gas is condensed to -5°C, and the condensed aniline is recovered. The liquid outlet of the condensation tower is connected to an aniline storage tank via a pipeline.

[0009] Preferably, the zeolite rotor concentration system is an adsorption system filled with zeolite. Provided by Jiangsu Longtai Environmental Protection Equipment Manufacturing Co., Ltd. The RTO incinerator is a combustion furnace with a combustion temperature greater than 800℃.

[0010] Preferably, the condenser is equipped with a heat exchange device. This cools the exhaust gas to below room temperature, promoting the rapid condensation and separation of ethanol. The liquid outlet of the condenser is connected to an ethanol storage tank via a pipeline.

[0011] Preferably, the oxidative scrubbing tower is filled with a 5% NaClO solution for degrading residual organic matter.

[0012] Preferably, the filter is equipped with an H14 grade HEPA filter.

[0013] Preferably, the online detection system includes an online pH detector and an online aniline gas detector.

[0014] Preferably, the activated carbon emergency adsorption tank is equipped with an activated carbon adsorption layer, and the exhaust gas outlet of the activated carbon emergency adsorption tank is connected to a chimney. This is used to adsorb residual aniline.

[0015] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] This invention first treats the exhaust gases from different workstations in different ways, while recovering the main raw materials, and then centrally treats the exhaust gases in a unified manner. This approach can maximize energy efficiency and improve the overall efficiency of the exhaust gas treatment, while ensuring environmental safety.

[0017] In summary, this utility model has a reasonable design, good treatment effect, and ensures environmental safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the equipment process according to an embodiment of the present utility model;

[0019] In the diagram, 1. Reactor; 2. Spray absorption tower; 3. Neutralization vessel; 4. Acid treatment vessel; 5. Packed absorption tower; 6. Polymerization reactor; 7. Condenser; 8. Zeolite rotor concentration system; 9. RTO incinerator; 10. Filter; 11. Condenser; 12. Oxidation scrubbing tower; 13. Filter; 14. Online monitoring system; 15. Chimney; 16. Activated carbon emergency adsorption tank. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, a tail gas treatment device for modified carbon black production includes a spray absorption tower 2 connected to the tail gas outlet of a reactor 1; a packed absorption tower 5 (two-stage, one stage for neutralizing HCl with 5% NaOH solution and the other stage for activated carbon adsorption) connected to the tail gas outlets of a neutralization reactor 3 and an acid treatment reactor 4 respectively; a condenser tower 7, a zeolite rotor concentration system 8, and an RTO incinerator 9 connected to the tail gas outlet of a polymerization reactor 6; and a condenser 11 connected to the tail gas outlet of a filter 10. The tail gas outlets of the spray absorption tower 2, the packed absorption tower 5, the RTO incinerator 9, and the condenser 11 are all connected in sequence to an oxidation scrubbing tower 12, a filter 13, and an online detection system 14 via pipelines. The tail gas outlet of the online detection system 14 is connected to a chimney 15 and an activated carbon emergency adsorption tank 16 respectively, and the tail gas outlet of the activated carbon emergency adsorption tank 16 is connected to the chimney 15.

[0022] In actual production, carbon black and NaOH solution need to be reacted at 50°C for 6 hours under nitrogen protection in reactor 1, so the tail gas will contain nitrogen and NaOH. These tail gases are sent to spray absorption tower 2, where 5% dilute sulfuric acid is sprayed in to neutralize the NaOH. The remaining gas is sent to oxidation scrubbing tower 12.

[0023] Because the raw materials in neutralization vessel 3 and acid treatment vessel 4 contain a large amount of hydrochloric acid, the tail gas needs to be sent to the packed absorption tower 5 first, where the hydrochloric acid is neutralized with 5% NaOH solution, and then the hydrochloric acid is adsorbed by the activated carbon adsorption layer. The remaining tail gas is sent to the oxidation scrubbing tower 12.

[0024] Because of the residual reaction of aniline in polymerization reactor 6, the tail gas mainly contains aniline. The tail gas is first sent to condenser tower 7 to be cooled to -5℃ to recover the condensed aniline. Then, it is sequentially sent to zeolite rotor concentration system 8 to concentrate the tail gas, and RTO incinerator 9 to incinerate the tail gas. The incinerated tail gas is then sent to oxidation scrubbing tower 12.

[0025] Because the filter 10 requires anhydrous ethanol for rinsing, the exhaust gas will contain ethanol. The exhaust gas is first sent to the condenser 11 to condense the ethanol, and then the remaining exhaust gas is sent to the oxidation scrubbing tower 12.

[0026] The pre-treated exhaust gas obtained from the previous process is further degraded in the oxidation scrubbing tower 12 with a 5% NaClO solution (mainly to treat residual organic matter). Then, it passes through the filter 13 to remove impurity particles and enters the online detection system 14 for online pH detection and online aniline gas detection. If the gas is qualified, it is sent to the chimney 15 for emission. If it is not qualified, it is sent to the activated carbon emergency adsorption tank 16 for further treatment (residual organic matter) and then sent to the chimney 15 for emission.

[0027] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A modified carbon black production tail gas treatment device, characterized by: The system includes a spray absorption tower connected to the tail gas outlet of the reactor, a packed absorption tower connected to the tail gas outlets of the neutralization reactor and the acid treatment reactor respectively, a condenser tower, a zeolite rotor concentration system, and an RTO incinerator connected to the tail gas outlet of the polymerization reactor, and a condenser connected to the tail gas outlet of the filter. The tail gas outlets of the spray absorption tower, the packed absorption tower, the RTO incinerator, and the condenser are all connected to an oxidation scrubbing tower, a filter, and an online monitoring system in sequence via pipelines. The tail gas outlet of the online monitoring system is connected to a chimney and an activated carbon emergency adsorption tank respectively.

2. The tail gas treatment device for modified carbon black production according to claim 1, characterized in that: The spray absorption tower is an acid washing tower.

3. The tail gas treatment device for producing a modified carbon black according to claim 1, characterized by: The packed absorption tower is equipped with two stages: a bottom alkaline washing layer and a top activated carbon adsorption layer.

4. The tail gas treatment device for modified carbon black production according to claim 1, characterized in that: The filter is equipped with an H14 grade HEPA filter.

5. The modified carbon black production off-gas treatment device according to claim 1, characterized by: The online detection system includes an online pH detector and an online aniline gas detector.

6. The tail gas treatment device for modified carbon black production according to claim 1, characterized in that: The activated carbon emergency adsorption tank is equipped with an activated carbon adsorption layer, and the exhaust gas outlet of the activated carbon emergency adsorption tank is connected to a chimney.

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