Garbage pyrolysis waste gas purification system and process

Abstract

The invention discloses a garbage pyrolysis waste gas purification system and process. The system comprises a garbage combustion chamber, a heat exchanger I, a cyclone dust collector, an electric collection dust removal composite tar removal device, an activated carbon adsorption tower, a dry desulfurization reactor, a dry dechlorination reactor, a catalytic combustor, a chimney, a heat exchanger II and a heat exchanger III. The process comprises the steps of flue gas primary purification, heat exchange heating and combustion purification, and heat exchange cooling and combustion air heating. Flue gas generated by garbage pyrolysis is subjected to multiple heat exchange with dechlorination reaction gas, catalytic combustion gas and air through the heat exchangers, waste heat in different waste gases can be fully utilized, the air is heated to a certain temperature and then enters the garbage combustion chamber to perform pyrolysis treatment on garbage, and the purposes of environmental protection and energy conservation are achieved. According to the system and the process, pollutants, such as particulate matters, smoke dust, dioxin, tar, SO2, HCl and other irritant gases, in the waste combustion flue gas can be effectively removed, and the treated tail gas can be discharged up to standard.

Description

technical field [0001] The invention belongs to the technical field of waste pyrolysis waste gas purification and treatment, and in particular relates to a waste pyrolysis waste gas purification system and a process. Background technique [0002] With the rapid development of urbanization, the phenomenon of wasting resources to improve the economy is endless, and more and more cities are facing the dilemma of garbage siege. The large amount of solid waste generated in daily life in cities has brought enormous pressure to the environment. These urban wastes will produce a large number of harmful components during the collection, transportation and treatment process, which will pollute the atmosphere, soil, water sources, etc., which is a domestic problem. one of the major environmental problems. At present, the treatment of domestic municipal solid waste mainly includes three technologies: landfill, composting and incineration. In addition to occupying land, landfill leacha...

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Problems solved by technology

[0008] According to the above three patented technologies for purification of waste incineration flue gas, it can be found that the designed system or method involves a spray device, and the spray device is used to clean the flue gas in waste incineration to remove acid gas or other Water-soluble organic pollutants, in which the spray liquid is an alkaline solution, which is likely to produce acid and alkali wastewater after the flue gas is treated, and the subsequent treatment process is complicated, which is prone to secondary pollution

In addition, the calorific value in the flue gas has not been effectively utilized, and the temperature of the flue gas discharged after treatment is relatively high, which is difficult to meet the requirements of environmental friendliness.

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