Lampblack purification device for microwave plasma torches

Abstract

The invention provides a lampblack purification device for microwave plasma torches. Lampblack and air are introduced into a purification tank for mixing, a stable high-temperature plasma region is generated by a microwave plasma torch array in the purification tank, high-energy impact is performed on harmful organic molecules in lampblack, original molecular bonds of the lampblack are opened, small molecular substances excited by high energy are converted into clean final products such as carbon dioxide, water and the like in an oxygen-enriched environment, and the purpose of lampblack purification is achieved. According to the device, power distribution of the microwave plasma torch array can be adjusted automatically according to gas flow and concentration of the lampblack, the treating effect and the efficiency of energy use are improved, the air supplementing quantity is adjusted according to a remaining oxygen detection value of a discharging pipe after purification, sufficient oxidation of organic pollutants in the lampblack is guaranteed, and the purifying treatment rate is guaranteed.

Description

technical field [0001] The invention relates to the technical field of oil fume purification, in particular to an oil fume purification device of a microwave plasma torch. Background technique [0002] During the heating process, oils will undergo thermal decomposition and oxidative decomposition to produce a large amount of volatile and non-volatile organic compounds, the main components of which are aldehydes, ketones, hydrocarbons, fatty acids, alcohols, aromatic compounds, ketones, lactones, heterocyclic compounds Wait. A large number of studies have shown that people who have been exposed to lampblack for a long time are as likely to suffer from respiratory diseases as long-term smokers, and can also cause a variety of mutation diseases. Therefore, the country has formulated the "Catering Fume Emission Standard" GB18483-2001, which has made corresponding regulations on the emission of cooking fume purification and treatment in the catering industry. In order to remove...

AI Technical Summary

Problems solved by technology

1) Low oil fume removal rate: The oil fume removal rate of the oil fume collection hood, water fume hood, physical filtration and other treatment methods is low, and a large amount of oil fume components still remain in the discharged gas, causing serious environmental pollution

In addition, some purification methods have low purification efficiency for certain types of components in oil fume, such as liquid foam washing, which has low purification efficiency for tiny mist droplets, and there is secondary pollution

2) The equipment structure is complex: such as the water spray washing tower purification process equipment, the installation space is large, and the system is complex, which leads to certain restrictions on its application occasions

3) The technology is complex and the equipment cost is high: For example, the technology required for photocatalysis and biocatalysis is difficult and the cost is high, while the equipment investment cost of the high-voltage electrostatic method is relatively high, and the application is subject to certain restrictions

4) The maintenance cycle is short and difficult: 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 work of professional purifiers, the high-voltage electrostatic method to collect the fume on the electrode is difficult to clean, and it is easy to cause secondary pollution. These regular maintenance tasks have led to an increase in cost and material costs

However, using the corona discharge method to generate plasma needs to work at a high peak voltage, it is not easy to obtain a stable corona discharge, and the reactor is prone to local arc discharge, which not only increases the power consumption, but also destroys the normal discharge, resulting in The purification efficiency is reduced; in addition, due to the long-term exposure of the electrodes in the device to the fume exhaust gas of various impurities, it is easy to be polluted, difficult to clean, short maintenance cycle, and high cost; and the use of catalysts has aging problems and needs to be replaced regularly, which increases the Oil fume purification treatment cost

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