Sludge drying and incinerating integrated treatment system and process thereof

Abstract

The invention discloses a sludge drying and incinerating integrated treatment system and a process thereof. A sludge incinerator is formed by externally laying a fire resistant material on a membrane wall; through the high-temperature smoke generated by sludge incineration, a part of heat is transferred to the membrane wall to generate steam which serves as a heat source together with the discharged smoke so as to dry the sludge; a sludge drying unit mainly consist of a hollow rotation shaft, a rotatable blade which is arranged on the shaft, a hollow outer wall and a fixed blade which is arranged on the hollow outer water; smoke and steam are used together for heat exchange; the hollow rotation shaft is arranged on a sludge incineration smoke pipe, serves as a part of the smoke pipe and asmoke heat source flows in the hollow rotation shaft; a steam heat source flows in the hollow outer wall; and after transferring heat to the sludge, the smoke heat source is treated to reach the emission standard and then is emitted. According to the sludge drying and incinerating integrated treatment system and the process thereof, the sludge drying and incinerating processes are closely integrated, the energies of various heat carriers in the sludge drying and incinerating processes are fully utilized, the system energy consumption is greatly reduced and good economical efficiency is provided.

Description

technical field [0001] The invention relates to a sludge treatment system and a process thereof, in particular to a sludge drying and incineration integrated treatment system and a process thereof. Background technique [0002] The moisture content of the concentrated sludge produced by the sewage treatment plant can be as high as 99%. The mass and volume are huge, which is not conducive to transportation and treatment. It is necessary to reduce its moisture content. At present, most sewage treatment plants in my country only dehydrate the concentrated sludge produced, and the moisture content of the dewatered sludge is still about 80%, which still cannot meet the requirements for subsequent treatment and disposal such as sanitary landfill, composting or incineration. According to the research on the distribution characteristics of water in sludge, the water in sewage sludge can be divided into "free water", "interstitial water", "surface bound water" and "internal bound wat...

AI Technical Summary

Problems solved by technology

The high-temperature flue gas produced by sludge incineration is generally subjected to dust removal, desulfurization, and denitrification after heat exchange by an air preheater. The heat in the high-temperature flue gas has not been effectively utilized, resulting in a large amount of energy loss

[0005] The existing sludge drying treatment process equipment and sludge incineration treatment process equipment are independent of each other, and both have problems such as high energy consumption and serious energy loss, which makes the sludge drying and incineration treatment process less economical

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