Portable harmless thermoelectric disposal method for town sludge and process system

Abstract

The invention discloses a portable harmless thermoelectric disposal method for town sludge. The portable harmless thermoelectric disposal method comprises the following steps: firstly, natural drying: inputting to-be-treated sludge into a rotary kiln, and treating the sludge in the rotary kiln to form dried sludge; secondly, incineration: inputting the dried sludge into a fluidized bed furnace for incinerating; incinerating the dried sludge to form inorganic furnace clinker and generating high-temperature flue gas; thirdly, utilization of the high-temperature flue gas: inputting the high-temperature flue gas into a waste heat boiler, carrying out heat exchange and generating high-temperature steam; inputting the high-temperature steam into a steam turbine, and converting the high-temperature steam into mechanical energy; conveying the mechanical energy to a generator; transmitting electric power generated by the generator to external power equipment for the system to use. The method has the advantages of realizing centralization, large scale, quickness and harmlessness, sufficiently utilizing a sludge calorific value, and being low in operation cost and short in recycling period. The invention also discloses a process system for the portable harmless thermoelectric disposal method for the town sludge. The system has the advantages of being simple in structure, stable in operation, high in safety, convenient to maintain and low in cost.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a convenient and harmless thermoelectric treatment method and process system for urban sludge. Background technique [0002] Sludge is the solid sedimentation material produced by water and wastewater treatment processes. At present, the disposal methods of the sludge produced after urban sewage treatment mainly include: dry landfill, aerobic fertilization, anaerobic fermentation, building material utilization, pyrolysis gasification and dry incineration. The above-mentioned methods all have obvious defects, so that the urban sludge generally has not been safely and credibly treated in a harmless manner, and has become a difficult social problem. For example: dry landfill has been expressly prohibited due to its pollution and land occupation; aerobic fertilizer production is difficult to operate normally due to its land occupation, odor and product use restrictions; ana...

AI Technical Summary

Problems solved by technology

For example: dry landfill has been expressly prohibited due to its pollution and land occupation; aerobic fertilizer production is difficult to operate normally due to its land occupation, odor and product use restrictions; anaerobic fermentation has harsh operating conditions, safety problems and secondary pollution problems It is difficult to promote; the continuous consumption of sludge by building materials utilization is restricted by the main business of building materials production; the utilization technology of pyrolysis and gasification sludge is complicated and still in the stage of small-scale trial production; High cost, limited to co-incineration in cement kiln and co-firing in boiler

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