Reduction dehydration system for municipal sludge

Abstract

The invention provides a reduction dehydration system for municipal sludge. The system comprises a dissolving tank, a dissolving agent adding device, a dissolving tank mud discharging pump, a dilutiontank, a dilution tank stirring zone, a dilution tank settling zone, a water outlet pump, a sludge outlet pump, a sludge conditioning tank, a sludge conditioning agent dosing device, a sludge conditioning pump, a sludge dewatering device, a solution conditioning tank, a solution stirring zone, a solution settling zone, a solution conditioning agent adding device, a conditioning liquid outlet pump,a conditioning settling sludge outlet pump, a flocculant production device, a sewage treatment device and a water pump. The system provided by the invention reduces a dry weight of dewatered sludge while improving dewatering property of the sludge.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a municipal sludge reduction and dewatering system. Background technique [0002] Sludge is a by-product of sewage treatment, with a large output and high moisture content. The composition of sludge is complex, and its solid content is high in organic matter. It contains nutrients such as nitrogen, phosphorus, and potassium, and also contains pollutants such as heavy metals and pathogenic microorganisms. After proper treatment, it can be used as a resource. However, due to the high moisture content of sludge, its output is huge. Generally, the moisture content of undehydrated sludge is about 97%, and the moisture content of dehydrated sludge is about 85%. When the sludge moisture content drops from 97% to 85%, the sludge volume decreases by 80%. Therefore, sludge dewatering is the most effective treatment method for sludge reduction. [0003] Generally, the organic matter conte...

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Problems solved by technology

[0003] Generally, the organic matter content of municipal sludge is 40%~60%, and its dehydration is poor. Most of them need to add inorganic flocculants, organic flocculants or other inorganic substances to improve the dehydration of municipal sludge. However, the moisture content after dehydration Still between 85% and 90%, the water content is high. In addition, due to the addition of inorganic flocculants, organic flocculants or other inorganic substances, the dry weight of the sludge increases, reducing the sludge reduction effect

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