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Wet-method chemical catalytic oxidation treatment method for processing VOCs organic exhaust gas and application thereof

A technology of organic waste gas and treatment process, which is applied in the direction of gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of equipment loss and cost increase, achieve good treatment effect, fast response speed, and convenient upgrading Effect

Inactive Publication Date: 2017-08-29
兴嵘环境科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Will lead to a large increase in equipment loss and cost

Method used

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  • Wet-method chemical catalytic oxidation treatment method for processing VOCs organic exhaust gas and application thereof
  • Wet-method chemical catalytic oxidation treatment method for processing VOCs organic exhaust gas and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0034] The filler in the heterogeneous catalyst layer in this example is Mn / r-AL 2 o 3 , the thickness of the heterogeneous catalyst is 0.5m; the filler in the mass transfer packing layer is a Pall ring made of ceramics, and the thickness of the mass transfer packing layer is 0.5m. The catalyst works at normal temperature and pressure.

[0035] In this embodiment, the oxidant injected in the first step is 8% hydrogen peroxide by mass percentage, and the added amount (weight) of the hydrogen peroxide is 6 / 10,000 of the total amount of VOCs organic waste gas; the solubilizer injected in the first step is Cobaltous sulfate, the addition amount (weight) of cobaltous sulfate is 3 / 10,000 of the total waste gas.

[0036] A packaging and printing workshop: VOCs organic waste gas volume is 15000m 3 / h, VOCs organic waste gas before treatment is mainly benzene, toluene, xylene, styrene and other benzene substances, and its concentration is described by non-methane total hydrocarbons....

Embodiment 3

[0040] The filler in the heterogeneous catalyst layer in this example is Mn / r-AL 2 o 3 , the thickness of the heterogeneous catalyst is 0.3m; the filler in the mass transfer packing layer is a Raschig ring made of ABS, and the thickness of the mass transfer packing layer is 3m. The catalyst works at normal temperature and pressure.

[0041] In this embodiment, the oxidant injected in the first step is 10% hydrogen peroxide by mass percentage, and the added amount (weight) of the hydrogen peroxide is 10 / 10,000 of the total amount of VOCs organic waste gas; the solubilizer injected in the first step is Potassium bisulfite, the addition amount (weight) of potassium bisulfite is 7 / 10,000 of the total waste gas.

[0042] A packaging and printing workshop: the amount of VOCs organic waste gas is 15000m3 / h. Before treatment, VOCs organic waste gas is mainly chlorinated products such as trichloroethylene, chloroform, trichloroethane, etc., and its concentration is described by non-m...

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Abstract

The invention discloses a wet-method chemical catalytic oxidation treatment method for processing VOCs organic exhaust gas and an application thereof. The method comprises the following steps: 1) a heterogeneous phase catalyst layer, a mass transfer filler layer, a spray layer, a demisting layer and an exhaust layer are arranged in a spray tower from down to up, an oxidation groove is connected at the bottom of the spray tower, the oxidation groove is filled with a circulation solution; and 2) VOCs organic exhaust gas is sent from the bottom of the spray tower, the VOCs organic exhaust gas passes through the heterogeneous phase catalyst layer and the mass transfer filter layer from the bottom of the spray tower, an organic substance in the VOCs organic exhaust gas is subjected to an oxidation reaction with an oxidizing agent and a solubiliser sprayed by a nozzle under the catalysis effect of the heterogeneous phase catalyst, the VOCs organic exhaust gas after oxidizing reaction passes through the demisting layer and the exhaust zone, and high-altitude discharge is carried out. Compared with an active carbon adsorption technology, the secondary pollution problem is existed; the reaction speed is fast, the organic substance in the exhaust gas can be reacted in dozens of milliseconds, and high empty tower flow velocity can be employed.

Description

technical field [0001] The invention belongs to the field of organic waste gas treatment, and in particular relates to a wet chemical catalytic oxidation treatment process for treating VOCs organic waste gas. Background technique [0002] As we all know, PM2.5 (fine particulate matter) and smog weather have increasingly serious impacts on people's life and health, and VOCs (volatile organic compounds) are one of the main factors that make the concentration of PM2.5 abnormal. [0003] At present, the technologies commonly used for VOCs terminal treatment include adsorption method, condensation method, combustion method, low temperature plasma method, photocatalytic oxidation method, and biological method. Among them, activated carbon is generally used as an adsorbent for adsorption. Activated carbon that absorbs organic waste gas is a hazardous waste, and the treatment cost is high. The stability of the treatment effect of the low-temperature plasma method and the photocatal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/44B01D53/96B01D53/54B01D53/52B01D53/48B01D53/70B01D53/72
CPCB01D53/8687B01D53/8603B01D53/8612B01D53/8621B01D53/8662B01D53/8668B01D53/96B01D2251/106B01D2255/2073B01D2255/2092B01D2257/7027B01D2257/708
Inventor 万为民
Owner 兴嵘环境科技(上海)有限公司
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