Garbage incineration and sludge treatment cooperation system and method

Abstract

The invention discloses a garbage incineration and sludge treatment cooperation system and method. The garbage incineration and sludge treatment cooperation system and method comprise a sludge hopper,a sludge drying machine and an incineration device; high-temperature tail gas output by the incineration device is guided into the sludge drying machine; wet sludge input in the sludge drying machinethrough the sludge hopper is directly dried through assistance by the high-temperature tail gas; the sludge dried in the sludge drying machine is transmitted into the incineration device to mix withgarbage for incineration power generation; the incineration tail gas is used for assisting direct drying of the sludge; and the tail gas generated by direct drying is used as secondary air to input inan incineration furnace. The garbage incineration and sludge treatment cooperation system and method achieve the effect of reducing the garbage incineration and sludge drying cost.

Description

Technical field [0001] The present invention relates to the technical field of garbage incineration and sludge treatment, in particular to a system and method for co-processing sludge by garbage incineration. Background technique [0002] In view of the advantages of waste incineration treatment technology, such as waste treatment technology such as sanitary landfill and composting, which occupy less land, less secondary pollution, and can use waste heat for heating or power generation, it has gradually become the mainstream technology of incineration treatment in my country. At present, the water treatment system of waste incineration plants will produce a certain amount of sludge (less). The sludge produced by the water treatment of waste incineration power plants generally adopts the method of directly entering the furnace into the feed hopper for incineration. For this method, the moisture content of the sludge after dehydration is still high, and the direct entry into the fe...

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Problems solved by technology

[0004] With the current control of low nitrogen oxide emissions, in order to control the generation of nitrogen oxides, waste incineration power plants have also begun to take relevant measures to control the oxygen concentration of the secondary air. For waste incinerators, the secondary air has no combustion effect. The main purpose of entering the furnace is to disturb, but it increases the oxygen content virtually, which increases the nitrogen oxides in the exhaust gas after incineration.

[0005] The indirect drying method is commonly used in sludge combustion treatment, but the investment cost of indirect drying is high (a ton investment is more than 800,000), the operation and maintenance cost is high, the land occupation is large, the system is complex, the stability is poor, the efficiency is low, and the waste water needs to be produced. Treatment, sludge products need to be treated, etc. Although direct drying has fewer problems than indirect drying, the amount of flue gas generated by direct drying is larger

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