Wet mud burning treatment apparatus with compound dryer

Abstract

The invention relates to a wet sludge incineration treatment device with a composite dryer. The exhaust gas treatment system is composed of dryer and dryer. The drying and incineration of wet sludge are concentrated in a single device. After the wet sludge is dried in the composite dryer, it returns to the furnace for incineration together with the circulating ash, so that the wet sludge The large amount of moisture contained does not enter the tail flue together with the high-temperature flue gas of the furnace, but is drawn out with the fluidized gas of the composite dryer, which reduces the heat loss of the system; The tube heat exchanger is connected, and the heat brought out of the furnace by the introduction of flue gas, together with the high-temperature circulating ash, is used as a heat source for wet sludge drying, making full use of the residual heat of the incinerator.

Description

technical field [0001] The invention relates to a waste (wet sludge) treatment device, in particular to a wet sludge treatment device which adopts a combination of drying and incineration with a compound dryer. technical background [0002] Sludge is the solid residue after sewage treatment, and the amount of sludge accounts for about 3‰ to 5‰ of the sewage treatment volume (calculated with a water content of 97%). The amount of industrial and domestic sewage treatment in our country is increasing rapidly. With the continuous construction of sewage treatment plants, more sludge will be produced. The composition of sludge is very complex. In addition to a large amount of water, it also contains common organic matter, refractory organic matter, various trace elements, pathogenic microorganisms, parasite eggs, and heavy metals. [0003] The sludge treatment method with incineration as the core process can meet the requirements of reduction, stabilization and harmlessness to th...

AI Technical Summary

Problems solved by technology

However, most of the existing sludge incineration methods require the use of special equipment to dry the sludge before incineration. The drying and incineration are completed in two sets of equipment, and the system is complicated; the drying equipment consumes a lot of energy. , high operating costs and high safety requirements; and simple incineration of dry sludge is easy to produce NOx, so a denitrification device needs to be installed after the incinerator; at the same time, due to the sulfur content in the sludge, a desulfurization device needs to be equipped after the incinerator

This makes the sludge incineration system complicated and the cost of harmless treatment high

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