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Catalytic combustion treatment method for chlorine-containing organic waste gas

A catalytic combustion and organic waste gas technology, applied in the direction of combustion methods, chemical instruments and methods, combustion types, etc., can solve the problems of increased processing costs, lye consumption, pipeline corrosion, etc., to achieve long service life and increase coating volume , good stability

Pending Publication Date: 2022-03-11
WUHUAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, HCl is corrosive to pipelines, on the other hand, the lye absorption method consumes lye, which increases the processing cost

Method used

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  • Catalytic combustion treatment method for chlorine-containing organic waste gas
  • Catalytic combustion treatment method for chlorine-containing organic waste gas
  • Catalytic combustion treatment method for chlorine-containing organic waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of Catalyst A:

[0037] Pretreatment of the second carrier cordierite honeycomb ceramics: soak the cordierite honeycomb ceramic carrier in dilute nitric acid with a mass concentration of 5% for 2 hours, then wash with deionized water for 3 times, and dry at 120°C for 10 hours to obtain surface-activated cordierite. Bluestone Honeycomb Ceramics.

[0038] Preparation of the first carrier: The carrier is prepared by co-precipitation method. Measure 1L of a mixed solution of 0.2mol / L cerium nitrate, 0.075mol / L zirconium nitrate, and 0.15mol / L aluminum nitrate, and add a mass concentration of 2wt dropwise while stirring at 80°C. % sodium carbonate solution, maintain the pH value of the solution at 10, continue to stir for 8 hours, age for 12 hours, then filter with suction, and wash the precipitate with deionized water until it becomes neutral. The filter cake was dried at 110°C for 12h and calcined at 500°C for 5h to obtain a CeZrAl carrier, wherein the Ce:Zr:A...

Embodiment 2

[0055] Preparation of Catalyst A:

[0056] Pretreatment of the second carrier cordierite honeycomb ceramics: the same pretreatment method as the second carrier cordierite honeycomb ceramics in Catalyst A of Example 1.

[0057] Preparation of the first carrier: the carrier is prepared by co-precipitation method, measure 1L of a mixed solution of 0.2mol / L cerium nitrate, 0.1mol / L zirconium nitrate, and 0.15mol / L aluminum nitrate, and add a mass concentration of 2wt dropwise while stirring at 80°C % sodium carbonate solution, maintain the pH value of the solution at 10, continue to stir for 8 hours, age for 12 hours, then filter with suction, and wash the precipitate with deionized water until it becomes neutral. The filter cake was dried at 110°C for 12h and calcined at 550°C for 5h to obtain a CeZrAl carrier, wherein the molar ratio of Ce:Zr:Al was 4:2:3.

[0058] Preparation of powder catalyst: Measure 50mL of 0.128mol / L chromium nitrate solution, 100mL of 0.328mol / L manganes...

Embodiment 3

[0072] Catalyst preparation:

[0073] The second carrier cordierite honeycomb ceramic pretreatment:

[0074] The pretreatment method of the second carrier cordierite honeycomb ceramics in catalyst A of Example 1 is the same.

[0075] Preparation of the first carrier: The carrier is prepared by co-precipitation method. Measure 1L of a mixed solution of 0.2mol / L cerium nitrate, 0.08mol / L zirconium nitrate, and 0.08mol / L aluminum nitrate, and add a mass concentration of 2wt dropwise while stirring at 80°C. % sodium hydroxide solution, maintain the pH value of the solution at 10, continue to stir for 8 hours, age for 12 hours, then filter with suction, and wash the precipitate with deionized water until it becomes neutral. The filter cake was dried at 110°C for 12h and calcined at 500°C for 5h to obtain a CeZrAl carrier, wherein the molar ratio of Ce:Zr:Al was 5:2:2.

[0076] Preparation of powder catalyst: Measure 50mL of 0.128mol / L chromium nitrate solution, 100mL of 0.256mol / ...

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Abstract

The invention discloses a catalytic combustion treatment method for chlorine-containing organic waste gas, and solves the problems of incomplete oxidation, catalyst poisoning, generation of high-toxicity byproducts, high cost and the like in the catalytic combustion treatment of the chlorine-containing organic waste gas. The chlorine-containing organic waste gas is treated and then introduced into an activated carbon adsorption bed for adsorption, and the activated carbon adsorption bed is switched after adsorption saturation; after being heated by a heater, air is fed into a saturated activated carbon adsorption bed to be subjected to desorption treatment, and gas led out after desorption treatment is heated and then is fed into a catalytic combustion reactor to be subjected to a catalytic combustion reaction; wherein the catalytic combustion reactor is filled with a catalyst A, a barrier medium and a catalyst B; the catalyst A is a catalyst for catalytic combustion of chlorine-containing VOCs; the catalyst B is an HCl oxidation catalyst. The method disclosed by the invention is simple, high in conversion rate and Cl2 selectivity, low in equipment investment and operation cost, long in service life of the catalyst and equipment and capable of recycling byproducts.

Description

technical field [0001] The invention relates to a treatment method for organic waste gas, in particular to a catalytic combustion treatment method for chlorine-containing organic waste gas. Background technique [0002] In recent years, volatile organic compounds have become one of the main sources of air pollution. Among the volatile organic compounds, chlorine-containing volatile organic compounds have the characteristics of high toxicity and difficult treatment, which have become the difficulty of treatment. Chlorine-containing volatile organic compounds are an important class of chemical raw materials, widely present in petrochemical, fine chemical and other industrial production. At the same time, waste incineration and other processes will also produce a large amount of chlorine-containing organic waste gas, which endangers human health and the ecological environment. [0003] For the treatment of chlorine-containing organic waste gas, the main treatment technologies...

Claims

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Application Information

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IPC IPC(8): F23G7/07B01J23/889B01J23/656B01J35/04
CPCF23G7/07B01J23/8892B01J23/6562B01J23/002B01J2523/00F23G2209/142B01J35/56B01J2523/17B01J2523/31B01J2523/3712B01J2523/48B01J2523/67B01J2523/72B01J2523/43B01J2523/47B01J2523/821Y02A50/20
Inventor 刘强卢文新张宗飞王志刚商宽祥张志国
Owner WUHUAN ENG
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