Deep dehydrating method of sludge

A deep dehydration and sludge technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of high moisture content after dehydration, low moisture content after dehydration, and inability to continue production and operation, so as to achieve low moisture content and high production efficiency. The effect of high efficiency and continuous operation

Inactive Publication Date: 2014-09-10
CHINA JILIANG UNIV
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Problems solved by technology

[0004] In view of this, the present invention aims at the problems of high moisture content after dehydration and incapable of continuous production and operation in the ab

Method used

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] As shown in the figure, the deep sludge dewatering method of the present invention is based on the deep sludge dewatering device, and the deep sludge dewatering device includes a front dewatering device and a rear dehydration device, and a There is a differential, the front dehydration device includes the first drum 2 and the auger 3, the auger 3 is located in the first drum 2, and the rear dehydration device includes the second drum 7 and a screw press filter 8, said screw press filter 8 is located in the second drum 7,

[0021] The steps of the sludge deep dewatering method are as follows:

[0022] The sewage is transported into the first drum 2 through the pipeline, and the first drum 2 and the screw propeller 3 rotate at a differential speed. Under the action of centrifugal force, the sludge is thrown onto the inner wall of the firs...

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Abstract

The invention discloses a deep dehydrating method of sludge. The method comprises the following steps: conveying sewage to a first rotary drum (2) through a pipeline, wherein the first rotary drum (2) and a spiral propeller (3) rotate differentially; under the centrifugal effect, throwing the sludge onto the inner wall of the rotary drum (2) to form a solid layer, forming a liquid layer inside the solid layer by using water and discharging the separated liquid; conveying the sludge treated by a front section dehydrating device to a second rotary drum (7) of a rear section dehydrating device, wherein a plurality of chambers are formed between a spiral press filter (8) and the second rotary drum (7), the chambers are sequentially reduced from front to back, and the spiral press filter (8) rotates and squeezes the sludge so that the sludge sequentially enters the chambers and the water content is continuously reduced. By adopting the method disclosed by the invention, the front section dehydrating device mainly filters water out of the sewage in a centrifuging manner and the rear section dehydrating device further treats the sludge in a centrifuging and press filtering manner, so that the method can be carried out continuously, is high in production efficiency and realizes low water content after dehydration.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge deep dewatering method for sludge treatment. Background technique [0002] A large amount of sludge will be produced in the process of sewage treatment, and its quality accounts for about 0.3%-0.5% of the treated water. The investment and operation cost of sludge treatment are very huge, and the cost of sludge treatment generally accounts for 10% of the operating cost of sewage treatment plants. 20%-50%, bringing a heavy burden to sewage treatment. According to the relevant national regulations, there are certain requirements for the moisture content of sludge (below 60%). The sludge must be dehydrated so that the moisture content will reach a certain value before subsequent treatment can be carried out. Therefore, dehydration of sludge It is the key process of sewage treatment. [0003] Sludge dehydration methods mainly include natural drying method, mechanical dehydra...

Claims

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Application Information

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IPC IPC(8): C02F11/12
Inventor 饶宾期曹黎周玲
Owner CHINA JILIANG UNIV
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