Method and system for deep dehydration of sludge

Abstract

The invention relates to a method and a system for deep dehydration of sludge. The method comprises the following steps: S1, adding sludge and a modifier to a sludge conditioning tank; S2, fully stirring the sludge and the modifier in the sludge conditioning tank, so that the sludge is subjected to flocculating modification; S3, carrying out second-level filtering on the sludge flowing out from the sludge conditioning tank, and then conveying to a high-pressure diaphragm plate-and-frame filter press to carry out filter pressing through a high-pressure pump, extruding the moisture in the sludge and forming a mud cake; S4, conveying the mud cake to a mud cake discharge bin to store through screw conveying equipment. The system comprises a modifier storage bin (1), a modifier conveyer (2), a sludge conditioning tank (3), a second-level filtering device (4), a high-pressure pump (5), a high-pressure diaphragm plate-and-frame filter press (6), screw conveying equipment (8) and a mud cake discharge bin (9). The method and the system are high in automatic degree, the sludge treatment efficiency is improved, the sludge is conveyed in the sealed equipment, and secondary pollution to the environment is not generated.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a method and system for deep dewatering of sludge. Background technique [0002] Due to the long-term "heavy water and light mud" in the construction process of my country's sewage plants, my country's urban sewage treatment plants basically achieved the initial reduction of sludge, but did not achieve the stabilization of sludge. According to statistics, the current disposal methods are mainly landfill, sludge aerobic fermentation, agricultural use, natural sludge drying, and sludge incineration. The existing sludge treatment methods have problems such as poor safety and low treatment efficiency, and will cause secondary pollution to the environment during the treatment process. [0003] Before the sludge in urban sewage treatment plants is incinerated or co-processed in cement kilns, the sludge must first be dehydrated. The raw sludge entering the plant contains impurities suc...

AI Technical Summary

Problems solved by technology

The raw incoming sludge contains impurities such as cotton yarn, which will block the sludge conveying pipeline and seriously wear out the equipment, affecting the operation rate of the equipment and the efficiency of sludge treatment

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