Sludge treatment system and treatment process

Abstract

The invention relates to a sludge treatment system and treatment process, and belongs to the technical field of water treatment. The process comprises the following steps: stabilizing the quality and quantity of sludge through a sludge thickener; feeding into a sludge conditioner, and throwing a conditioner to perform wall breaking treatment on the sludge; feeding into a high-pressure mechanical plate and frame filter press, and performing pressure filtration until the water content is 55-60%; feeding into a sludge drying furnace, and performing indirect heat exchange through low-temperature fume produced by a sludge charring furnace until the water content of the dewatered sludge to dried to 10% or below; and feeding into the sludge charring furnace, and pyrolyzing the dried sludge through high-temperature fume produced by an incineration hot-blast furnace to produce biochar and tail gas, wherein the tail gas produced by the sludge drying furnace and the sludge charring furnace is fed into a tail gas purification tower for purification and separation, the produced combustible gas and waste oil are fed into the incineration hot-blast furnace for incineration, and the biochar is comprehensively utilized. According to the invention, sludge from a sewage treatment plant can be treated economically and efficiently, thereby realizing comprehensive utilization of the sludge from a sewage treatment plant.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a sludge treatment system and a treatment process, in particular to a treatment system and a treatment process for sludge produced in a sewage treatment plant during the water treatment process. Background technique [0002] With the development of sewage treatment in our country, the water pollution problem has been effectively alleviated, but the sludge output of sewage plants is increasing. The amount of sludge accounts for 0.3% to 0.5% (volume) of the amount of sewage or 1% to 2% of the amount of sewage treatment. If advanced treatment is carried out, the amount of sludge will increase by 0.5 to 1 times. Due to factors such as high difficulty in sludge treatment technology, large investment, and uncertain returns, domestic enterprises involved in this field are few and small in scale, and there is a large gap compared with advanced foreign countries. Amon...

AI Technical Summary

Problems solved by technology

[0016] In order to make more reasonable and comprehensive utilization of organic matter and its calorific value in sludge, especially to solve the problems of high heavy metal content, high investment cost, complicated management and high operating cost in the sludge treatment process

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