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Deep sludge dewatering technology

A deep dewatering and sludge dewatering technology, applied in dewatering/drying/concentrating sludge treatment, etc., can solve the problems of complex process, large operation volume, high energy consumption, improve corrosion resistance, avoid tilt, and reduce production costs Effect

Inactive Publication Date: 2016-02-10
SHANGHAI TECHASE ENVIRONMENT PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When conventional deep dehydration treats sludge, it is usually diluted with water first to increase the moisture content to about 95%, and chemical agents such as FeCl3 and lime need to be added for conditioning before entering deep dehydration equipment (membrane filter press, etc.) for dehydration. Complex process, high energy consumption, large amount of operation, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the present invention A sludge deep dehydration process , including the following steps:

[0031]1) The sludge with a moisture content of 82% produced after dehydration is transported to the ultra-high pressure elastic press by a screw type conveying pump; the pump outlet pressure of the screw conveying pump is 0.7-2MPa;

[0032] 2) The ultra-high pressure elastic press adopts the secondary pressing method to deeply dehydrate the sludge, so that the moisture content of the sludge is reduced to 53%; the pressing pressure of the ultra-high pressure elastic press is controlled at 3-7MPa, and the pressing feeding time is controlled at 20 -50mins, pressing time is 30-150mins;

[0033] 3) The sludge with a water content of 53% after deep dehydration is transported to the pulverizer by the conveyor, and the sludge is pulverized into powder or block;

[0034] 4) Transport the pulverized sludge to the boiler for incineration or make bricks and ot...

Embodiment 2

[0041] Such as figure 1 As shown, the present invention A sludge deep dehydration process , including the following steps:

[0042] 1) The sludge with a moisture content of 85% produced after dehydration is transported to an ultra-high pressure elastic press by a screw type conveying pump; the pump outlet pressure of the screw conveying pump is 0.7-2MPa;

[0043] 2) The ultra-high pressure elastic press adopts the secondary pressing method to deeply dehydrate the sludge, so that the moisture content of the sludge is reduced to 55%; the pressing pressure of the ultra-high pressure elastic press is controlled at 3-7MPa, and the pressing feeding time is controlled at 20 -50mins, the pressing time is 30-150mins; Wherein, used ultra-high pressure elastic press and filter plate thereof are identical with those described in embodiment 1;

[0044] 3) Transport the sludge with a water content of 55% after deep dehydration to the pulverizer by the conveyor, and pulverize the sludge...

Embodiment 3

[0047] Such as figure 1 As shown, the present invention A sludge deep dehydration process , including the following steps:

[0048] 1) The sludge with a water content of 75% produced after dehydration is transported to the ultra-high pressure elastic press by a screw type conveying pump; the pump outlet pressure of the screw conveying pump is 0.7-2MPa;

[0049] 2) The ultra-high pressure elastic press adopts the secondary pressing method to deeply dehydrate the sludge, so that the moisture content of the sludge is reduced to 50%; the pressing pressure of the ultra-high pressure elastic press is controlled at 3-7MPa, and the pressing feeding time is controlled at 20 -50mins, the pressing time is 30-150mins; Wherein, used ultra-high pressure elastic press and filter plate thereof are identical with those described in embodiment 1;

[0050] 3) The sludge with a water content of 50% after deep dehydration is transported to the pulverizer by the conveyor, and the sludge is pul...

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Abstract

The invention discloses a deep sludge dewatering technology. The technology includes the steps that dewatered sludge with the water content being 80% or so is delivered to an ultrahigh-pressure elastic squeezer through a screw type sludge delivery pump to be deeply dewatered so that the water content of the sludge can be reduced to 50-55%; according to a filter plate of the ultrahigh-pressure elastic squeezer, a plurality of middle elastic supports are symmetrically and evenly arranged in the middle of a pressure bearing plate, and a plurality of protruding blocks are also symmetrically and evenly arranged in the middle of the pressure bearing plate; the deeply dewatered sludge is smashed to be incinerated or recycled. According to the technology, the screw type delivery pump is applied to feeding of the ultrahigh-pressure elastic squeezer, the middle elastic supports are symmetrically and evenly arranged on the filter plate of the ultrahigh-pressure elastic squeezer, the filter plate can bear the pressure difference with the maximum value not exceeding 1 MPa from the two sides under the supporting and buffering action of the middle elastic supports, then the poor-uniformity sludge with the water content being 80% or so can be directly squeezed, the sludge does not needed to be added with water to be diluted or conditioned before entering the squeezer, and therefore the effects of saving water and energy and omitting conditioning cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment and relates to a sludge deep dewatering process. Background technique [0002] In sewage sludge treatment, after sludge dehydration, sludge with a water content of about 80% will be produced. The sludge needs to be further dehydrated before it can be incinerated or recycled. When conventional deep dehydration treats sludge, it is usually diluted with water first to increase the moisture content to about 95%, and chemical agents such as FeCl3 and lime need to be added for conditioning before entering deep dehydration equipment (membrane filter press, etc.) for dehydration. The process is complicated, the energy consumption is high, and the operation volume is large. Contents of the invention [0003] The object of the present invention is to provide a deep sludge dehydration process that can directly feed the sludge without dilution or conditioning by adding drugs, and can directly dehy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 孙刚范刘道广朱冬梅汪家喜
Owner SHANGHAI TECHASE ENVIRONMENT PROTECTION
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