Sludge resource treatment process and system

Abstract

The invention discloses a sludge resource treatment process and a sludge resource treatment system. The process comprises S1, a modification step, namely a step of respectively putting wet sludge anda sludge modifier into a sludge modification mixer for modification; S2, a dehydration step, namely a step of conveying the modified sludge to a sludge rolling deep dehydrator for rolling deep dehydration; S3, a vacuum drying step, namely a step of conveying the sludge subjected to rolling deep dehydration to a sludge vacuum drying machine, continuously heating through a steam system, and vacuumizing the sludge vacuum drying machine through a vacuum system; S4, a granulation step, namely a step of conveying the dry sludge subjected to vacuum drying treatment to a granulator for granulation, and screening out fine powder in the granulation process to obtain sludge particles; and S5, a destructive distillation and carbonization step, namely a step of pushing the sludge particles into a destructive distillation and carbonization device for pyrolysis to obtain biochar, and treating mixed gas generated in the destructive distillation device to serve as a heat source of the destructive distillation device or/and the steam system. According to the process and the system, reduction, harmlessness and recycling treatment of sludge is realized.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a sludge resource treatment process and a system thereof. Background technique [0002] With the rapid development of my country's economic construction and the continuous improvement of urban residents' living standards, they are also facing the increasingly serious threat of sludge pollution, which has become one of the focus issues that people generally pay attention to, and directly affects the social economy and The coordinated development of the environment. Sludge waste generally contains pathogenic microorganisms, heavy metals, and a large amount of organic matter. Currently, the main disposal methods for sludge are anaerobic digestion, aerobic composting, sludge incineration, and sludge landfill. Biogas sludge produced by anaerobic digestion is also likely to cause secondary pollution, and the resource utilization is not complete; aerobic fermentatio...

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Problems solved by technology

Biogas sludge produced by anaerobic digestion is also likely to cause secondary pollution, and resource utilization is not complete; aerobic fermentation compost is easily affected by sludge and has a relatively large limitation; because landfill occupies a large amount of land resources, the country is gradually Limit the landfill ratio; incineration, the organic matter is completely oxidized, and almost all heavy metals (except mercury) remain in the ash. The above-mentioned outlets cannot be "harmless", that is, completely remove pathogenic microorganisms, heavy metals, and super viruses Bacteria "Three Mountains"

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