Sterile drying and carbonization oxygen-controlled incineration sludge treatment system and treatment method

Abstract

The invention discloses a sterile drying and carbonization oxygen-controlled incineration sludge treatment system and treatment method. The treatment system comprises a drying cylinder, a sludge conveyor and an inert gas source, wherein the drying cylinder comprises an inner-layer energy kettle and an outer-layer energy kettle which are coaxially nested and synchronously move, an inner-layer spiral guide vane which spirally extends in the axial direction is arranged on the inner side of the inner-layer energy kettle, an outer-layer spiral guide vane which spirally extends in the axial direction is arranged on the inner side of the outer-layer energy kettle, and the rotating direction of the inner-layer spiral guide vane is opposite to that of the outer-layer spiral guide vane; the feedingend of the inner-layer energy kettle is in butt joint with the sludge conveyor, the discharging end of the inner-layer energy kettle is in butt joint with the feeding end of the outer-layer energy kettle, a combustion chamber is formed in the feeding end of the outer-layer energy kettle, a combustor is arranged in the combustion chamber, and the inert gas source is communicated with the combustionchamber. By means of heat storage of the drying cylinder and oxygen-controlled firing in the combustion chamber, moisture in the sludge is rapidly converted into evaporation, microorganisms are inactivated, organic matters are decomposed and carbonized, and continuous treatment of sterile drying and carbonization of the sludge is achieved.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a treatment system and treatment method for aseptic drying, carbonization, oxygen-controlled incineration sludge. Background technique [0002] Sludge disposal is difficult and environmental risks are accumulated. In 2020, the annual output of municipal sludge in my country is expected to reach 60 million to 90 million tons. Due to "heavy water and light mud" and sludge disposal has not kept pace, more than 80% of the sludge produced by my country's sewage treatment plants has not been properly treated. Random dumping, stacking and landfilling will lead to serious secondary pollution and greatly reduce the effect of pollution reduction. The water content in the sludge generated during the production process of the sewage treatment plant (mud cake obtained by dehydrating the flocculated mud) is as high as about 80%. Sewage treatment plants produce about 6 to...

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