Sludge drying and incinerating system, sludge drying machine and sludge drying method

Abstract

The invention relates to a sludge drying and incinerating system, which comprises a sludge drying machine and a heat source, wherein the sludge drying machine comprises at least one first sludge drying module; the first sludge drying module comprises a first enclosed shell, a first heat conducting sludge support plate, a scraping mechanism, a first fan, an evaporating and condensing device and a first surface cooler which is connected with the heat source; and the evaporating and condensing device comprises a compressor, a condenser and an evaporator which are connected to form a loop, a cold medium in the loop and a drainer. Heat is transferred to the first sludge support plate by the condenser to heat sludge; air is supplied by the first fan to form evaporation-accelerated air current on the surface of the sludge; circulating air is condensed and dehydrated by the evaporator; and the sludge can be dried quickly by hot air with low moisture content in an energy-saving way. Moreover, a plurality of first sludge drying modules a plurality of second sludge drying modules can be connected together and combined segmentally for drying, so that the sludge drying rate is effectively increased and the water content of sludge is lowered.

Description

technical field [0001] The invention relates to a sludge treatment system, in particular to a sludge drying and incineration system capable of treating sludge. Background technique [0002] General urban domestic sewage plants or waste water plants produce a large amount of domestic sludge. The usual sludge treatment method is: after the domestic sludge is press-filtered, its water content is usually about 80%, and the sludge with high water content is mostly used used in landfill, high-temperature composting, etc., which is likely to cause new environmental pollution. The sludge incineration treatment is the most thorough sludge solution, but the sludge with high moisture content cannot be directly incinerated, it must be dehydrated, dried or added combustion auxiliary materials first. The latter method not only wastes fuel but also produces new pollution, so generally sludge should be dried before incineration. [0003] Traditional sludge drying uses high-temperature ste...

AI Technical Summary

Problems solved by technology

Due to the large investment in infrastructure construction and high operating costs, the sludge problem at home and abroad has not been effectively solved. The problem of sludge drying and incineration has become a bottleneck problem that needs to be solved urgently in urban sewage treatment plants.

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