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A kind of reaction system and purification method for purifying VOCs in industrial waste gas

A reaction system and industrial waste gas technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of low VOCs removal efficiency, achieve good acid and alkali resistance, low percolation rate, and good thermal stability sexual effect

Active Publication Date: 2021-05-11
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: Aiming at the problem of low removal efficiency of VOCs in industrial waste gas in the prior art, the present invention proposes a reaction system for purifying VOCs in industrial waste gas, and provides a method for purifying VOCs in industrial waste gas through the reaction system

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  • A kind of reaction system and purification method for purifying VOCs in industrial waste gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take the waste gas generated in the simulated industrial production process, the temperature of the waste gas is 125°C, and the concentration of dichloromethane in the waste gas is 20mg / m 3 . Add the prepared metal-organic framework material Fe@UIO-66 into the catalyst support device of the reaction tower, in which the mass percentage of Fe element is 5%, and its specific surface area is 1290m 2 / g. Prepare 0.5mol / L concentration of H at room temperature 2 o 2 solution, pH 6.4, H 2 o 2 The mass ratio of the solution to Fe@UIO-66 is 1000:1, and it is evenly sprayed into the above reaction system, and the gas-liquid ratio in the reaction tower is 6L / m 3 , the empty tower speed is controlled at 5000h -1 . After 30 minutes, the concentration changes of dichloromethane in the reaction solution and the exhaust gas outlet were detected respectively.

[0045] The removal rate of dichloromethane is 94%.

Embodiment 2

[0047] Take the waste gas produced in the simulated industrial process, the temperature of the waste gas is 65°C, and the concentration of toluene in the flue gas is 20mg / m 3 . Add the prepared metal-organic framework material Fe@UIO-66 into the catalyst support device of the reaction tower, in which the mass percentage of Fe element is 8%, and its specific surface area is 1020m 2 / g. Prepare 0.03mol / L concentration of H at room temperature 2 o 2 solution, pH 6.8, H 2 o 2 The mass ratio of the solution to Fe@UIO-66 is 800:1, and it is evenly sprayed into the above reaction system, and the gas-liquid ratio in the reaction tower is 16L / m 3 , the superficial velocity in the reaction process is controlled at 7000h -1 . After 30 minutes, the changes in the concentration of toluene in the reaction solution and the exhaust gas outlet were detected respectively.

[0048] The removal rate of toluene is 98%.

Embodiment 3

[0050] Take the waste gas produced in the simulated industrial process, the temperature of the waste gas is 65°C, and the concentration of toluene in the flue gas is 20mg / m 3 . Add the prepared metal organic framework material UIO-66 in the catalyst support device of the reaction tower, and its specific surface area is 1020m 2 / g. Prepare 0.03mol / L concentration of H at room temperature 2 o 2 solution, pH 6.8, H 2 o 2 The mass ratio of the solution to UIO-66 is 800:1, evenly sprayed into the above reaction system, the gas-liquid ratio in the reaction tower is 16L / m 3 , the superficial velocity in the reaction process is controlled at 7000h -1 . After 30 minutes, the changes in the concentration of toluene in the reaction solution and the exhaust gas outlet were detected respectively.

[0051] The removal rate of toluene is 82%.

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Abstract

The invention discloses a reaction system and purification method for purifying VOCs in industrial waste gas. The reaction system is a heterogeneous oxidation reaction system composed of a metal organic framework UIO-66 material and a hydrogen peroxide solution, wherein the hydrogen peroxide solution and the metal organic framework UIO The mass ratio of ‑66 material is 50:1~1000:1. The method for purifying VOCs in industrial waste gas by using the above reaction system comprises the following steps: placing the heterogeneous oxidation reaction system in the flue gas absorption tower, and the industrial waste gas is introduced from the bottom of the flue gas absorption tower, and enters the heterogeneous oxidation reaction system to generate Oxidation reaction, the industrial waste gas after the reaction is discharged from the top of the flue gas absorption tower, wherein the gas-liquid ratio in the flue gas absorption tower is 6-28L / m 2 . The reaction system of the present invention degrades VOCs in industrial waste gas into carbon dioxide by means of heterogeneous oxidation, and the degradation efficiency of VOCs can reach more than 96%, realizing the simultaneous removal of various pollutants; the industrial waste gas treated by the reaction system It can meet VOCs emission standards and be directly discharged into the atmosphere.

Description

technical field [0001] The invention relates to a reaction system and a purification method for purifying VOCs in industrial waste gas, belonging to the field of gas pollutant control. Background technique [0002] Volatile organic compounds, often expressed as VOCs, is the abbreviation of the first letter of the three words Volatile Organic Compounds. VOCs gases mainly include a series of organic compounds such as aldehydes, alcohols, benzene series, esters, ethers, ketones, etc., which are widely produced in fuel combustion, petrochemical, electronics, automotive equipment manufacturing, printing and other fields. The harm of VOCs is obvious. VOCs inhaled into the human body have a strong carcinogenic effect. When the VOC concentration in the air exceeds a certain concentration, it can cause headaches, nausea, and vomiting, and in severe cases, convulsions, coma, and memory loss. With the growing needs of our people for a better life, the treatment of VOCs in industrial ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/72B01D53/70B01D53/44
CPCB01D53/864B01D53/8662B01D53/8668B01D53/8687B01D2251/106B01D2255/705B01D2257/2064B01D2257/7027B01D2257/704B01D2257/708
Inventor 朱文欣丁丁周长松张婷婷陈佳敏其他发明人请求不公开姓名
Owner NANJING NORMAL UNIVERSITY