Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for two-stage plasma coupling deep purification of catering waste gas

A technology for catering waste gas and plasma, which is applied in the field of flue gas purification, can solve the problems of poor comprehensive treatment effect of pollutants, difficult treatment technology to meet the standard, and can not fully meet the standard discharge, etc., and achieves simple device, convenient operation and short process. Effect

Active Publication Date: 2018-08-03
北京世纪星光科技有限公司
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, cooking fume contains a large amount of NO X / PAHs and other "three causes" substances, it is difficult to meet the standard treatment by conventional treatment technology
At present, the existing catering flue gas treatment technologies, such as wet spraying treatment technology, filtration treatment technology, photolysis treatment technology, electrostatic treatment technology, etc., all have poor comprehensive treatment effects of pollutants, cannot fully meet the discharge standards, and high energy consumption in operation. shortcoming

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for two-stage plasma coupling deep purification of catering waste gas
  • Method for two-stage plasma coupling deep purification of catering waste gas
  • Method for two-stage plasma coupling deep purification of catering waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0058] According to a preferred embodiment of the present invention, the preliminary separation and preliminary decomposition of the catering exhaust gas are performed in a high-voltage electrostatic plasma reactor.

[0059] Among them, the high-voltage electrostatic plasma reactor is a synthesis of high-voltage electrostatic and plasma. Plasma is composed of species such as ions, electrons, free radicals, and excited atoms or molecules. It belongs to the fourth state besides solid, liquid, and gaseous states. Since the positive and negative charges in the gas are equal within a certain space, the It forms a plasma.

[0060] In a further preferred embodiment, the preliminary separation is to use high-voltage discharge to charge and separate waste gas droplets of different particle sizes in the catering waste gas.

[0061] In the present invention, the catering waste gas includes waste gas droplets and volatile organic compounds.

[0062] In a further preferred embodiment, the prelimi...

Embodiment 1

[0112] (1) Set the VOC concentration to 40mg / m 3 The exhaust gas from the restaurant is passed into the high-voltage electrostatic plasma reactor 4 through the air inlet 3, wherein 48 electrode tubes 42 are arranged in parallel in the high-voltage electrostatic plasma reactor, and the setting direction is consistent with the airflow direction, and the inlet wind speed is 8m / s , The voltage is 12KV. Under the action of the high-voltage electrostatic plasma reactor, the oil and gas droplets and water vapor droplets in the exhaust gas converge into larger-diameter exhaust gas droplets, which are then removed.

[0113] At the same time, long carbon chain volatile organic compounds are broken into short carbon chain compounds, and the pressure drop after passing through the high-voltage electrostatic plasma reactor is 200 Pa;

[0114] (2) The short carbon chain compounds separated by the above-mentioned high-voltage electrostatic plasma reactor enter the microwave plasma reactor 6, where...

Embodiment 2

[0116] The method used in this embodiment is similar to the method used in embodiment 1, except that in (1), the inlet wind speed of the high-voltage electrostatic plasma reactor 4 is 15m / s, and the voltage is 15KV. The pressure drop after the high-voltage electrostatic plasma reactor is 300Pa.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for two-stage plasma coupling deep purification of catering waste gas. According to the method, liquid droplets in catering waste gas are subjected to charge separation by a high-voltage electrostatic plasma reactor while the long carbon chain of volatile organic compounds are broken to obtain short carbon chain small molecule compounds, and the short carbon chainvolatile organic compounds in the catering waste gas are adsorbed by a microwave plasma reactor to decompose into carbon dioxide and water so as to effectively remove pollutants from the catering waste gas, such that the treated gas can be directly discharged to the atmosphere. The method of the present invention has advantages of simple operation, low operating energy consumption and high catering waste gas removal rate.

Description

Technical field [0001] The invention belongs to the field of flue gas purification, and specifically relates to a two-stage plasma coupling method for deeply purifying catering exhaust gas. Background technique [0002] In recent years, with the rapid promotion of my country's urbanization process, the catering industry has shown a blowout development, which has led to increasingly serious catering exhaust gas pollution. In high temperature conditions, edible oil produces a large amount of thermal oxidation decomposition products. When the smoke point reaches 170°C, blue smoke of initial decomposition appears. As the temperature continues to rise, the decomposition speed increases. When the temperature reaches 250°C, A lot of oily smoke appeared on the oil surface, accompanied by a pungent smell. Catering waste gas pollutants mainly include organic matter contained in edible oil and vegetables, volatile components produced by thermal oxidation and thermal cracking, and pollutant...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D53/32B01D53/04
CPCB01D53/0407B01D53/32B01D53/323B01D2257/708B01D2259/806B01D2259/818
Inventor 李小梅
Owner 北京世纪星光科技有限公司