Photoelectric high-energy purification device for treating particulate matter 2.5 (PM2.5) in cooking fume

Abstract

The invention discloses a photoelectric high-energy purification device for treating particulate matter 2.5 (PM2.5) in cooking fume. The photoelectric high-energy purification device comprises a plasma reaction system, a filtrate fog grid, a filtrate fog humidifying system and a photochemical and catalytic reaction system. The photochemical and catalytic reaction system comprises an ultraviolet generating array and catalytic reaction nets, wherein the catalytic reaction nets are respectively arranged in front and in back of the ultraviolet generating array. Cooking fume exhaust gas is purified after passing through the plasma reaction system, the filtrate fog grid, the filtrate fog humidifying system and the photochemical and catalytic reaction system in sequence. The photoelectric high-energy purification device also comprises an electrical control system. The electrical control system comprises a current induction module, an online monitoring module, an electrochemical sensing module and a display screen. The photoelectric high-energy purification device disclosed by the invention has the advantages that secondary pollution residues cannot be generated; the resource consumption is low; the operating cost is lower; management and maintenance are convenient; the process is advanced and reliable; real-time online operating data can be provided; and a data support of supervision and administration of law enforcement is provided for environmental-protection functional departments.

Description

technical field [0001] The invention relates to a photoelectric high-energy purification device for treating PM2.5 in cooking fumes, and belongs to the technical field of protection of the atmosphere and the living environment of urban and rural residents. Background technique [0002] PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 microns in the atmosphere, also known as particulate matter that can enter the lungs. Its diameter is less than 1 / 20 of the thickness of a human hair. Although PM2.5 is only a small component of the earth's atmospheric composition, it has an important impact on air quality and visibility. Compared with coarser atmospheric particulate matter, PM2.5 has a small particle size, is rich in a large amount of toxic and harmful substances, has a long residence time in the atmosphere, and has a long transportation distance, so it has a greater impact on human health and the quality of the atmospheric environment. [0003] Pr...

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Problems solved by technology

[0005] In the past, methods such as water spray washing, activated carbon adsorption filtration and biological deodorization were often used to remove odors. Since water spray is used to remove soot from oily fume through water spray washing, it can only be used to a limited extent. Wash some large particles of oil fume and dust, and the defects of its process also lead to the spray washing system not being able to fully contact and react with the oil fume and fume. Small particles of oil fume and dust will become fish that slip through the net. Secondary pollution of sewage; the disadvantage of the activated carbon adsorption and filtration method is that the emission of oil fume is continuous and large air volume discharge, and the activated carbon will be saturated and invalid within a week, and the replacement cost needs hundreds or even up to If it is more than one thousand yuan, the monthly replacement cost will be as high as four or five thousand yuan, which will greatly increase the operating cost of the catering industry, and they are almost unwilling to replace it. After the equipment is installed, it will be useless. secondary pollution

Some people use the method of spraying concentrated plant spice liquid to cover up the peculiar smell of oil fume, turn the concentrated plant spice into a liquid state, spray it in the space near the kitchen and in the oil fume pipe, let the deodorant liquid droplets contact with the odor substance molecules in the oil fume, and use deodorizing The smell of the liquid covers the odor of the oily fume. As a result, due to uneven contact, the effect of removing the oily smoke is not only good but also the cost is high, and it also increases the new pollution caused by the deodorizing liquid.

As for the biological deodorization technology, due to the high temperature of the fume, in the summer in the southern region, the temperature of the fume in the exhaust duct is as high as 45-60 degrees, making it difficult for microorganisms to survive stably. In addition, restaurants need to be closed or holidays, microorganisms will lose their source of energy, biological deodorization method is not suitable for the treatment of cooking fume

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