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Deep dehydration method based on sludge wall breaking

A deep dehydration and sludge technology, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problems of poor water content in sludge and impact on the environment, so as to improve the effect and reduce the process Energy consumption, efficient wall breaking effect

Pending Publication Date: 2021-09-24
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a deep dehydration method based on sludge wall breaking to overcome the disadvantages of poor sludge water content and impact on the environment in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Pump the sludge with a moisture content of 99wt% into the wet ultrafine pulverizer. The model of the wet ultrafine pulverizer used in the laboratory simulation experiment is SS-7010, start the wet ultrafine pulverizer, and set the breaking gear The bit is 5000rpm, and the wall breaking time is 60 minutes;

[0021] The fully broken sludge was dehydrated through filter press equipment, and the water content of the sludge was measured to be 47.3wt%.

Embodiment 2

[0023] Pump the sludge with a moisture content of 96wt% into the wet ultrafine pulverizer. The model of the wet ultrafine pulverizer is used in the laboratory simulation experiment. The bit is 8000rpm, and the wall breaking time is 45 minutes;

[0024] The fully broken sludge was dehydrated through filter press equipment, and the moisture content of the sludge was measured to be 46.8wt%.

Embodiment 3

[0026] Pump the sludge with a moisture content of 90wt% into the wet ultrafine pulverizer. The model of the wet ultrafine pulverizer is used in the laboratory simulation experiment. The bit is 10000rpm, and the wall breaking time is 30 minutes;

[0027] The fully broken sludge was dehydrated by filter press equipment, and the moisture content of the sludge was measured to be 48.2wt%.

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Abstract

The invention relates to the field of sludge treatment, in particular to a deep dehydration method based on sludge wall breaking, which is used for solving the sludge treatment current situation that the water content of sludge in a sewage treatment plant is difficult to further reduce. The method comprises the following steps: extracting biomass-rich sludge with the water content of 80-99wt% from a storage pool; inputting into a wet-process ultrafine grinder through a pipeline to carry out efficient reciprocating wall breaking; dewatering the sludge subjected to wall breaking through filter pressing, wherein the water content of the sludge subjected to filter pressing is smaller than or equal to 50 wt%, so that the purpose of deep dewatering of the sludge is achieved. Compared with the prior art, the wall breaking effect on sludge biological cells is outstanding; without any chemical reagents, the water content of the sludge can be obviously reduced, the subsequent utilization range of the dewatered sludge product is wide, and the treatment concept of solid waste recycling is met.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a deep dehydration method based on sludge wall breaking. Background technique [0002] Sewage treatment plants will inevitably produce a large amount of sludge in the process of treating sewage, and the moisture content of the sludge is generally above 95wt%. High water content not only restricts the subsequent utilization of sludge, but also has a huge adverse impact on the natural environment. The traditional physical and mechanical method generally removes about 20wt% of the water content of the sludge. In terms of technology, the physical method is often combined with the chemical dosing method to obtain a higher water content removal. However, the addition of chemicals will not only increase the burden on the natural environment, but also restrict the utilization range of dewatered sludge. [0003] Developing a new sludge pretreatment process, increasing the sludge dehydrat...

Claims

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Application Information

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IPC IPC(8): C02F11/121C02F11/122
CPCC02F11/121C02F11/122
Inventor 陆永生刘强陈晨吴翔张国卿应超军赵军
Owner SHANGHAI UNIV
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