Purified flue gas treatment device for domestic waste incineration plant

Abstract

The invention discloses a purified flue gas treatment device for a domestic waste incineration plant. The purified flue gas treatment device comprises a dust remover, a main pipeline A, a branch A, an electric gate valve A, an electric gate valve B, a branch B, a heat dissipation device, a waste storage pit, a main pipeline B and a chimney, wherein the dust remover is respectively connected with the branch A and the branch B through the main pipeline A; the electric gate valve A is mounted on the branch A and is connected with the chimney through the main pipeline B; the electric gate valve B is mounted on the branch B and is connected with the chimney via the heat dissipation device and the main pipeline B; and the heat dissipation device is mounted in the waste storage pit. Since the branch A and the branch B are designed on the purified flue gas treatment device, residual heat of flue gas entering the chimney is utilized through the heat dissipation device of the branch B in winter, so the temperature of the waste storage pit is increased from below 0 DEG C to about 15 DEG C, water-containing components already frozen in the waste can be melted, and therefore the incineration heat value of the charging domestic waste is significantly increased in winter and reaches the same level as that in the other three seasons.

Description

technical field [0001] The invention relates to a domestic waste incineration technology, in particular to a device for treating flue gas after purification in a domestic waste incineration plant. Background technique [0002] In recent years, the waste incineration power generation treatment method has developed rapidly in my country and has become one of the main ways to deal with municipal solid waste in our country. At present, domestic garbage in our country is still mainly collected in a mixed manner, and affected by the eating habits of our people, the content of organic perishable garbage in the mixed garbage is mostly 50%-70%, and the moisture content is very high. value is greatly reduced. Due to the generally low calorific value of domestic waste incineration in my country, the effect of domestic waste incineration with grate-type waste incinerators is not ideal, and the thermal efficiency is very low. In some less developed areas, grate-type waste incinerators c...

AI Technical Summary

Problems solved by technology

[0004] In the process of incinerating waste in waste incineration power plants, a large amount of high-temperature flue gas is generated in the incinerator. These high-temperature flue gases first exchange heat with the water in the waste heat boiler to release heat energy and lower the temperature, and then enter the waste incineration power plant Flue gas purification system, in order to ensure the normal operation of the bag filter in the flue gas purification system of the waste incineration power plant, the temperature of the high-temperature flue gas is not allowed to drop too low, and the temperature of the purified flue gas entering the chimney is 150 -160°C, the flue gas contains a lot of heat and is directly discharged, which not only causes environmental pollution, but also wastes a lot of energy

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