Method for purifying cooking fume organic matter

Abstract

The invention provides a method for purifying cooking fume organic matter. The method includes: air is fed into a to-be-processed area in a constant circulation manner to allow the cooking fume organic matter and oxygen to be physically sufficiently mixed to form mixed cooking fume organic matter; working gas at the starting end of the torch tube of a microwave plasma torch device is stimulated by a microwave electromagnetic field to generate high-energy electrons, the mixed cooking fume organic matter in the to-be-processed area is allowed to pass the plasma flame of the microwave plasma torch device, the high-energy electrons collide with the passing cooking fume organic matter to allow the molecular bonds of the cooking fume organic matter to sequentially break according to bond energy magnitude so as to generate small molecular substances and / or organic free radicals, the high-energy electrons collide with oxygen and water molecules to generate O free radicals, OH free radicals and active particles, and the small molecular substances and / or organic free radicals react with the O free radicals, OH free radicals or active particles to generate CO2 and H2O; the processed cooking fume is discharged out of a range hood. The method is suitable for being popularized in domestic range hoods, good in cooking fume removing effect and stable.

Description

technical field [0001] The invention belongs to oil fume purification treatment technology, and in particular relates to a method for purifying oil fume organic matter through plasma treatment. Background technique [0002] With my country's reform and opening up and economic development, especially the rise of the tertiary industry, the catering service industry has developed and grown rapidly. While people enjoy a rich and varied diet, the cooking fume emitted by the catering industry has also brought more and more serious environmental problems. A large amount of untreated oil fume is discharged into the air, polluting and destroying the surrounding environment, and endangering the physical and mental health of residents. Therefore, it is imperative to protect the clean and pure urban environment of residents and strengthen the management of cooking fumes in the catering industry. [0003] During the cooking process, edible oil and food undergo a series of chemical reac...

AI Technical Summary

Problems solved by technology

[0013] 1) The oil fume removal rate is not ideal: the above are all based on various physical methods for oil fume purification, the oil fume removal rate is low, and there are still a large amount of oil fume components in the discharged gas, which seriously pollutes the environment

[0014] 2) The equipment structure is complex: such as water spray washing tower purification process equipment installation space is large, the system is complex

The occasions leading to its application are subject to certain constraints

[0015] 3) The treatment effect is unstable: the treatment effect of the oil fume treatment device is affected by the cleanliness of the surface, and the initial operation effect is good. When the surface of the treatment device is attached by oil fume and other pollutants, the treatment effect will be seriously affected

[0016] 4) The maintenance period is short and the maintenance cost is high: for example, high-voltage electrostatic purification needs to be cleaned every two weeks, physical filtration needs to be cleaned every week, biological purification needs to be processed and updated regularly, and liquid foam washing needs to be drained and added every 2 to 3 days. The job of a professional purifier

However, corona discharge requires a sufficiently high voltage to increase the electric field at the corona site, and the daily voltage is difficult to meet the working voltage requirements of the micropulse plasma power supply. The booster equipment is bulky, expensive, and has potential safety hazards; Under the working conditions of strong electric field, it is not easy to obtain stable corona discharge, and it is also easy to generate local arc discharge. Since the electrode is in contact with the oil fume and exhaust gas containing various impurities for a long time, it is easy to be polluted and needs to be cleaned and maintained on a daily basis; in addition, the catalyst There is an aging problem, and it needs to be replaced regularly, which increases the cost of oil fume purification and treatment, and is difficult to apply to daily life

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