System and method of sludge by using drying incineration heat balance treatment

Abstract

The invention provides a system and a method of sludge by using drying incineration heat balance treatment. The problem that a self heat balance of the sludge with higher water content and lower dry basis heat value cannot be achieved in a drying incineration treatment process is aimed, a high-temperature stink containing water vapor discharged in the sludge drying process is used for pre-heatingcold air; then an auxiliary heating device is adopted to further heat the pre-heated air; and finally the further heated air is subjected to heat exchange with incineration hot flue gas to form hot air, wherein the heat of the hot air is not lower than the heat required by drying of the sludge. By adopting the method of the sludge by the drying and incineration, the sludge drying incineration heatbalance can be realized.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge drying and incineration heat balance treatment system and method. Background technique [0002] During the collection and disposal of urban sewage, a large amount of sludge will inevitably be produced. The sludge has the characteristics of high organic matter content, easy odor, large output and high moisture content. At present, the main methods of sludge disposal in developed countries include land use, sanitary landfill, ocean disposal, and sludge drying and incineration. Various disposal methods have their own advantages and disadvantages. The heavy metals and bacteria in the sludge restrict the land use of the sludge; sanitary landfill requires a large landfill space, and due to the high moisture content of the sludge, the output is large, and there is no more space for it. Sanitary landfill; marine disposal is likely to cause marine pollution and pose a threat to t...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the sludge with high water content and low calorific value on a dry basis cannot achieve its own heat balance in the drying and incineration treatment process, and utilizes the high-temperature odor containing water vapor discharged from the sludge drying process, which is beneficial to cold The air is preheated, and then an auxiliary heating device is used to reheat the preheated air. The reheated air finally exchanges heat with the incineration hot flue gas to become hot air. The heat of the hot air is not lower than the heat required for sludge drying.

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