A kind of organic solid waste thermal hydrolysis treatment system and its treatment process

Abstract

The invention discloses a thermal hydrolysis treatment system for organic solid waste and its treatment process, including a sludge storage tank, a pipeline-type self-heat exchange and reaction assembly assembly, a reaction sludge pressure storage tank, a mechanical dehydration unit, a sewage tank and sludge pump; through the sludge pump, the mixing of sludge and process water injection can be realized, eliminating the need for traditional conditioning tank conditioning; at the same time, the heat of gas generated by thermal hydrolysis can be fully utilized through pipeline-type self-heat exchange and reaction assembly components, effectively The sludge-sludge heat exchange efficiency is improved; the reaction sludge pressure storage tank is used to store a part of the pressure energy of the reaction sludge. On the one hand, the adjustment range of the regulating valve can be reduced and the life of the valve can be extended. On the other hand, the pressure energy can be used for subsequent Reaction slime dehydration process. The invention has a simple and reasonable structure, fully recovers most of the heat in the process, greatly reduces the energy consumption of the process, and the products can be utilized as resources, thereby obtaining significant social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of organic solid waste treatment, in particular to a thermal hydrolysis treatment system for organic solid waste and a treatment process thereof. Background technique [0002] With the continuous advancement of my country's urbanization and the continuous improvement of environmental protection requirements, more and more attention has been paid to the treatment and disposal of organic solid waste, especially a large amount of municipal sludge, domestic garbage and kitchen waste. Organic solid waste refers to solid and semi-solid organic waste that pollutes the environment produced by human beings in production and living activities. Organic solid waste generally includes municipal sludge, industrial sludge, kitchen waste, domestic waste, especially wet waste. , river sediment, high-concentration organic waste liquid, feces, etc. The slurry made of organic solid waste has similar chemical and physical proper...

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Problems solved by technology

[0004] ①The thermal hydrolysis process uses flash evaporation to generate high-temperature steam to preheat the low-temperature sludge in the slurry tank. The temperature of the sludge after thermal hydrolysis decreases from 165°C to 13--110°C during the flash evaporation process, and then After thermal hydrolysis, the sludge still needs to be diluted with water and heat-exchanged with cooling water to take away the heat. This process has limited heat recovery for the high-temperature sludge after thermal hydrolysis, resulting in the need for additional steam for the sludge before thermal hydrolysis. heating;

[0005] ②At present, there are many tanks in the thermal hydrolysis process, and some of them need to be equipped with independent slurry tanks and flash tanks, which increases the process links and investment and operation costs

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