Incineration processing method and device for wet sludge

Abstract

The invention relates to a wet sludge incineration treatment method and device. The wet sludge is directly incinerated in an incinerator at 800-950°C or added with auxiliary fuel; the required air is graded and fed into the furnace; limestone can also be added to the furnace to reduce the temperature. SO2 emissions. The incineration treatment device includes a furnace, a cyclone separator, a feeder and a tail flue; the side wall of the furnace is insulated, the top of the furnace is equipped with a wet sludge inlet, and the lower part is equipped with an auxiliary fuel inlet; the tail flue is equipped with a high-temperature air preheating device. The invention integrates wet sludge drying, incineration and flue gas harmless treatment in a single device simultaneously, simplifies the incineration treatment process of wet sludge, reduces treatment cost and can realize low-level discharge of incineration pollutants.

Description

technical field [0001] The invention relates to a waste treatment method and device, in particular to a wet sludge incineration treatment method; the invention also relates to a wet sludge incineration treatment device. Background technique [0002] Sludge is a by-product of sewage treatment, and the amount of sludge accounts for 0.3% to 0.5% (volume) or 1% to 2% (mass) of the sewage treatment volume. With the development of industrial and agricultural production and the continuous construction of sewage treatment plants in various places, the amount of industrial and domestic sewage treatment in my country is increasing rapidly, and more sludge will be generated. The composition of sludge is very complex. In addition to a large amount of water, it also contains a large amount of organic matter, refractory organic matter, various trace elements, pathogenic microorganisms, parasite eggs, and heavy metals. How to make harmless and resourceful sludge with huge output and compl...

AI Technical Summary

Problems solved by technology

However, the existing sludge incineration method requires pretreatment of the sludge such as drying first, and then incineration, which complicates the system; at the same time, incineration of the dried sludge will produce a large amount of NOx, and must be equipped with a degasser after the incinerator. Nitrogen device; since the sludge contains sulfur, it must also be equipped with a desulfurization device after the incinerator

Therefore, the existing sludge incineration process includes multiple unit processes such as sludge drying, sludge incineration, tail gas desulfurization, tail gas denitrification, etc., which are carried out in unit equipment respectively, which makes the system complex and the cost of harmless treatment is high.

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