Sludge drying equipment using waste heat of landfill gas power generation

Abstract

The invention provides sludge drying equipment using waste heat of landfill gas power generation, which belongs to environmental protection equipment. The equipment employs waste heat of condensed water of a landfill gas power generator assembly, flue gas, waste water and the like to heat and dry sludge entering into the equipment with a hollow stirrer in the sludge drying equipment, and can recycle condensed water of the power generator assembly and reduce the temperature of flue gas and waste water to be discharged; the outer walls of a stirring drying cabin and a spindle are provided with vacuum heat pipes, and a conveying drying cabin is also provided with vacuum heat pipes, which enables a low grade heat source in the stirring drying cabin to be recycled again and to be used for redrying sludge in the conveying drying cabin, thereby realizing reutilization of the waste heat of landfill gas power generation. The sludge drying equipment provided in the invention has the advantages of a reasonable structure, a high waste heat utilization rate, a good sludge drying effect, strong capability of continuous working, etc.

Description

[0001] Field [0002] The invention relates to waste heat drying sludge equipment for landfill biogas power generation, which belongs to the category of environmental protection equipment. Background technique [0003] With the gradual acceleration of the construction of urban sewage treatment facilities and the increasing rate of centralized sewage treatment, the amount of sludge produced by sewage treatment plants has increased dramatically. According to relevant predictions, the amount of urban sewage in my country will increase substantially in the next two decades, and the amount of sewage discharged in 2010 will reach 440×10 8 m 3 / d; In 2020, the sewage discharge will reach 536×10 8 m 3 / d; The amount of sludge usually accounts for 0.3% to 0.5% (volume) of the sewage volume or about 1% to 2% (mass) of the sewage treatment volume. Moreover, if the sewage is further treated, the amount of sludge will increase by 0.5 to 1 times. At present, my country's sewage treatme...

AI Technical Summary

Problems solved by technology

[0007] However, in many waste heat utilization designs, the recovery of heat sources is mainly used to heat steam to generate electricity or heat water or gas for heating. The efficiency of waste heat utilization is not high, and the application fields are very limited. Its progress in the utilization of low-grade heat sources is slow.

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