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Method and device for purifying catering oil smoke by utilizing synergistic effect of low temperature plasma and catalysts

A low-temperature plasma and synergistic technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problems of unseen volatile organic compounds and unlimited purification efficiency, and achieve the function of increasing condensation and growth , Reduce investment and operating costs, and high efficiency

Active Publication Date: 2014-05-14
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the existing technology can only solve the particulate matter contained in the oil fume, and the purification efficiency is not limited.
On the other hand, there is no report on the efficient purification of particulate matter contained in oil fume and efficient purification of volatile organic compounds.

Method used

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  • Method and device for purifying catering oil smoke by utilizing synergistic effect of low temperature plasma and catalysts
  • Method and device for purifying catering oil smoke by utilizing synergistic effect of low temperature plasma and catalysts
  • Method and device for purifying catering oil smoke by utilizing synergistic effect of low temperature plasma and catalysts

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Experimental program
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Effect test

Embodiment 1

[0038] The first discharge electrode 506, the second discharge electrode 508, and the third discharge electrode 510 in the low-temperature plasma reaction zone are all in a zigzag shape. The first discharge electrode 506 is connected to the first high-voltage power supply 502, which is a negative DC high-voltage power supply. The discharge voltage -12kV; the second discharge electrode 508 and the third discharge electrode 510 are connected to the second high-voltage power supply 503, which is a positive DC high-voltage power supply, and the discharge voltage is +11kV; the first ground electrode 507 and the second ground electrode 511 are plate shape. The catalyst support is TiO 2 ; doped SiC and La 2 o 3 As a co-catalyst, the doping amount is 8wt.% and 6wt.% (mass percentage); the active component is manganese oxide, and the element manganese accounts for 5wt.% of the catalyst 504; the catalyst is regenerated by microwave heating . Use the catering oil fume purifier based ...

Embodiment 2

[0040] The first discharge electrode 506 in the low-temperature plasma reaction zone is needle-shaped, and the first discharge electrode 506 is connected to the first high-voltage power supply 502, which is a positive DC high-voltage power supply, and the discharge voltage is +6kV; the second discharge electrode 508 and the third discharge electrode 510 are all prickly, connected to the second high voltage power supply 503, which is a negative DC high voltage power supply, and the discharge voltage is -6kV; the first ground electrode 507 and the second ground electrode 511 are both plate-shaped. The catalyst support is Al 2 o 3 ; doped ZrO 2 and SiO 2 As a co-catalyst, the doping amount is 5wt.% and 5wt.% respectively; the active component is copper oxide, and the mass percentage of copper in the catalyst 504 is 8wt.%. The catalyst 504 is regenerated by infrared heating. Use the catering oil fume purifier based on this configuration to treat the catering oil fume in a unive...

Embodiment 3

[0042] The first discharge electrode 506 in the low-temperature plasma reaction zone is star-shaped, and the first discharge electrode 506 is connected to the first high-voltage power supply 502, which is a negative polarity DC power supply, and the discharge voltage is -18kV; the second discharge electrode 508 and the third discharge electrode 510 are both The gear shape is connected in series (six teeth are evenly distributed on each gear), connected to the second high-voltage power supply 503, which is a positive polarity DC superimposed high-frequency AC power supply, wherein the positive polarity DC working voltage is +15kV; the first grounding electrode 507 and The second ground electrodes 511 are all hexagonal honeycomb bodies. The catalyst support is Al 2 o 3 ; doped SiO 2 As a cocatalyst, the doping amount is 20wt.% by mass; the active components are manganese oxide and copper oxide, and the mass percent of manganese in catalyst 504 is 3%, and the mass percent of co...

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Abstract

The invention discloses a method and device for purifying particulate matters and volatile organic compounds in catering oil smoke by utilizing a synergistic effect of low temperature plasma and catalysts. The method comprises the following steps: enabling the oil smoke to sequentially pass through a low temperature plasma reaction area and a catalytic reaction area, wherein the volatile organic compounds contained in the oil smoke are partially oxidized in the low temperature plasma reaction area and are further oxidized in the catalytic reaction area. On the front section of the low temperature plasma reaction area, the particulate matters contained in the oil smoke are separated, removed or charged by alternately arranged positive and negative polarity high-voltage discharge; on a transition section of the low temperature plasma reaction area, particles with positive charges and negative charges are close and are subjected to coagulation growth; on a rear section of the low temperature plasma reaction area, the particles are continuously subjected to the coagulation growth and are captured and separated. According to the method, the function of efficiently purifying the volatile organic compounds is increased; the efficiency of removing the particulate matters contained in the oil smoke is relatively high; the normal temperature operation can be realized, the fouling resistance is high, and the method is particularly suitable for being used for performing oil smoke treatment in public places such as various dining halls, public houses and hotels.

Description

technical field [0001] The invention relates to a cooking fume purification method and device, belonging to the technical field of environmental protection. More specifically, it relates to a method and device that utilizes the synergistic effect of low-temperature plasma and catalyst to remove particulate matter and volatile organic compounds contained in cooking fume and prevent secondary pollution of ozone. Background technique [0002] Chinese cooking methods are mainly frying, frying, frying, and cooking. During the cooking process, a lot of oily fume is produced. Its composition includes oil, thermal oxidation and pyrolysis products, and smoke from fuel combustion. Organic compounds, and have the special properties of easy condensation and strong adhesion. Its emission is characterized by a large number and dispersion, a small amount of single-point emission but a low emission height. With the development of my country's national economy and the improvement of people...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/86B01D53/76B01D49/00B01D53/44B01D53/96
CPCY02P70/10
Inventor 朱天乐丁雳纳宏波孙也
Owner BEIHANG UNIV
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