Sludge deep dewatering device

Abstract

The invention discloses a sludge deep-dewatering device. The sludge deep-dewatering device comprises a motor, a front-section dewatering device and a rear-section dewatering device, wherein the front-section dewatering device comprises a first rotary drum and a spiral pusher, a first differential is arranged between the motor and the first rotary drum and the spiral pusher, the spiral pusher is located in the first rotary drum, a first drainage opening is formed in the first rotary drum, a second differential is arranged between the front-section dewatering device and the rear-section dewatering device, the rear-section dewatering device comprises a second rotary drum and a spiral press filter, the spiral press filter is located in the second rotary drum, a sludge conveying mechanism is arranged between the first rotary drum and the second rotary drum, the spiral press filter is provided with a filter layer and a drainage passage, and the drainage passage is communicated with the second rotary drum through the filter layer. According to the sludge deep-dewatering device, the front-section dewatering device is mainly used for filtering moisture out of 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 deep dewatering device 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...

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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 inability to operate continuously in the prior art, and provides a deep sludge dewatering device capable of continuous operation, high production efficiency, and low moisture content after dehydration

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