Treatment system for reducing household refuse incineration smoke Dioxin and application method

Abstract

The invention discloses a treatment system for reducing household refuse incineration smoke Dioxin. The treatment system comprises a refuse receiving chamber and a refuse storage chamber which are isolated through a door; a bad smell outlet of the refuse storage chamber is connected with a refuse incineration furnace secondary combustion chamber zone (oxygen enrichment zone); a refuse incineration furnace is further provided with an air inlet and a refuse inlet used for receiving refuse of the refuse storage chamber; a smoke outlet of the refuse incineration furnace is connected with an inlet of a waste heat power generation boiler, and an outlet of the waste heat power generation boiler is connected with an inlet of a first bag type dust collector; an outlet of the bag type dust collector is connected with an inlet of an SCR reactor, an outlet of the SCR reactor is connected with an air preheater smoke inlet, an air preheater smoke outlet is connected with an inlet of a second bag type dust collector, and an outlet of the second bag type dust collector is connected with an inlet in the lower portion of a deacidification demisting tower; and an outlet in the upper portion of the deacidification demisting tower is connected with a chimney. In addition, the invention comprises a method of the system. According to the treatment system and the application method, the HCi, SO2, NOx and dust removal rate is high, and the Dioxin concentration is smaller than 0.01 ngTEQ / Nm3.

Description

technical field [0001] The invention relates to a process for treating flue gas pollutants from domestic garbage incineration. In particular, it relates to a system for combined deodorization, denitrification, desulfurization, dust removal, dioxin and heavy metal removal of flue gas from domestic garbage incineration power plants; in addition, it also includes the application method of the treatment system. Background technique [0002] With the advancement of urbanization in our country, urban domestic waste has exploded with the increase of urban population. In 2015, the amount of urban domestic waste accumulated nationwide reached 20 billion tons, occupying an area of ​​nearly 2 million mu of land, and about two-fifths of the cities were surrounded by garbage. Most of the original landfills were closed in advance. The harmless, reduction and resource treatment of municipal solid waste has become a key issue for the sustainable development of my country's urban ecologica...

AI Technical Summary

Problems solved by technology

Similarly, the semi-dry method for SO 2 The removal efficiency is about 85%. For the flue gas whose SO2 concentration reaches 600mg / Nm3 from the incinerator, it is very difficult to reduce it to the standard of 80mg / Nm3 by using the semi-dry method alone.

The main method of dioxin treatment is to stay in the incinerator at 850°C for more than two seconds, completely oxidize and decompose, and then reduce it to below 250°C through a quenching boiler to avoid re-synthesis of dioxin in the temperature range of 250-500°C, and then pass through activated carbon Powder adsorption, cloth bag interception method to control the emission of dioxins, but there are still cases of excessive emissions, the quenching boiler is easy to corrode, and the cost is high

Difficulty and high cost of odor treatment in garbage storage pits

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