Method and system for deep dehydration of sludge

A deep dehydration and sludge technology, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems that affect the operation rate of equipment and sludge treatment efficiency, blockage of sludge conveying pipes, and wear equipment, etc., to improve equipment operation Rate and work efficiency, reduce equipment maintenance rate, reduce the effect of winding wear

Active Publication Date: 2014-04-02
华新环境工程有限公司 +1
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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

Method used

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  • Method and system for deep dehydration of sludge
  • Method and system for deep dehydration of sludge
  • Method and system for deep dehydration of sludge

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Embodiment Construction

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0037] A kind of method of deep dewatering of sludge of the present invention comprises the following steps:

[0038] S1. Add raw sludge and modifier into the sludge conditioning tank. In this example, quicklime and ferric chloride are used as modifiers, which are low in cost, and the moisture content of the raw sludge is about 80%.

[0039] S2. Fully stir the sludge and modifier in the sludge conditioning tank. The sludge and modifier react in the conditioning tank to flocculate and modify the sludge, which is convenient for the subsequent high-pressure diaphragm plate and frame filter press. Deep dehydration of sludge. The sludge conditioning tank is equipped with a filter screen for primary filtration of the sludge...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 李叶青王焕忠黄晓理张江江涛缪文娟
Owner 华新环境工程有限公司
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