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Centrifugation and pressure filtration double sludge dewatering method

A sludge and dual technology, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve the problems of inability to continue production and operation, high moisture content after dehydration, and low moisture content after dehydration in production efficiency, and achieve high production efficiency. Low moisture content, the effect of reducing moisture content

Inactive Publication Date: 2014-09-03
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention aims at the problems of high water content after dehydration and incapable of continuous production and operation in the above-mentioned prior art, and provides a double sludge centrifugal press filter that can operate continuously, has high production efficiency, and has low water content after dehydration. Dehydration method

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  • Centrifugation and pressure filtration double sludge dewatering method
  • Centrifugation and pressure filtration double sludge dewatering method
  • Centrifugation and pressure filtration double sludge dewatering method

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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 sludge centrifugal filter press double dehydration method of the present invention is based on a sludge deep dewatering device, and the sludge deep dewatering device includes a front dehydration device and a rear dehydration device, and a front dehydration device and a rear dehydration device There is a differential between them, 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 first Two rotating drums 7 and a screw press filter 8, the described screw pressing filter 8 is located in the second rotating drum 7,

[0021] The steps of the dehydration 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 rotat...

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Abstract

The invention discloses a centrifugation and pressure filtration double sludge dewatering method. The method comprises the steps: sewage is conveyed into a first rotary drum (2) through a pipeline, the first rotary drum (2) and a spiral pusher (3) are in differential rotation, sludge is thrown to the internal wall of the first rotary drum (2) under the action of centrifugal force, so as to form a solid layer, and a liquid layer is formed at the inner side of the solid layer by water; the sludge treated by a front-section dewatering device is conveyed into a second rotary drum (7) of a rear-section dewatering device, a plurality of chambers are formed between a spiral press filter (8) and the second rotary drum (7), spiral pressure filtration blades (8.2) are made from elastic materials, high-pressure fluid is introduced into the spiral pressure filtration blades, so as to expand the spiral pressure filtration blades, and the expanded spiral press filter rotates and extrudes the sludge. According to the centrifugation and pressure filtration double sludge dewatering method, the front-section dewatering device is mainly used for filtering moisture out of the sewage by means of centrifugation, and the rear-section dewatering device is used for carrying out further treatment on the sewage by means of centrifugation and pressure filtration, so that continuous operation can be carried out, the production efficiency is high, and the moisture content is low after dewatering.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge centrifugal press filter double dehydration 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 dryin...

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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