Sludge pyrohydrolysis and gasification processing system and treatment process thereof

Abstract

The invention discloses a sludge pyrohydrolysis and gasification processing system and a treatment process thereof. The sludge pyrohydrolysis and gasification processing system comprises a sludge slurrying device, a heating pressurization reactor, a flash evaporation pot, a machinery dehydration device, a pyrolysis vapourizing furnace, an exhaust-heat boiler and a flue gas processing device, the sludge slurrying device is connected with a heating pressurization reactor, gas de-watering equipment, the pyrolysis vapourizing furnace, the exhaust-heat boiler and the flue gas processing device in order through an extraction pump, the exhaust-heat boiler is connected with the heating pressurization reactor through a steam pipeline, the flash evaporation pot is connected between the heating pressurization reactor and the sludge slurrying device, and a heat exchanger, the machinery dehydration device and a feeding machine are connected between the heating pressurization reactor and the pyrolysis vapourizing furnace in order. By employing steam heating and pyrolysis vapourizing furnace for treatment, pathogen and insect ovum in the sludge are completely killed; no chemical agent is added in the treatment process, all the products enable resource utilization, so that the sludge pyrohydrolysis and gasification processing system has the advantages of safety and stability, low exhaust gas generation amount, and obvious emission reduction effect.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge thermal hydrolysis gasification treatment system and a treatment process thereof. Background technique [0002] With the continuous improvement of my country's urbanization level, urban sewage treatment facilities have developed rapidly. In 2014, there were 3,622 sewage treatment plants nationwide, and the wastewater treatment volume reached 153 million cubic meters per day. With the generation of a large amount of sludge, the output is about the volume of treated water. 0.15%-1%. At present, the sludge treatment method in my country is mainly landfill, which accounts for a large proportion, followed by agricultural use, and a small amount of incineration. Both sludge landfill and land use have certain risks. A large amount of heavy metals and other harmful substances that may be contained in sludge will accumulate on the soil surface, causing pollution to groun...

AI Technical Summary

Problems solved by technology

Both sludge landfill and land use have certain risks. A large amount of heavy metals and other harmful substances that may be contained in sludge will accumulate on the soil surface, causing pollution to groundwater. Sludge also contains many pathogenic bacteria, which will cause Environmental pollution, and landfill will consume a lot of land resources

Incineration is difficult to promote due to large investment and high operating costs

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