Film pressure thermal dehydration method and equipment for high-moisture sludge

A technology of membrane pressure and high water content, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of complex process equipment and difficult operation, and achieve the effect of simple process flow, small concentration gradient and low energy consumption

Inactive Publication Date: 2011-06-29
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of organic solvents prevents the sludge from being used as a biological fertilizer, and the tail gas treatment load is increased during the incineration and pyrolysis process. Therefore, there are still barriers to specific applications.
[0005] The publication date is April 18, 2007, the publication number is CN1948192A, and the invention patent application number is 200610016350.2 d

Method used

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  • Film pressure thermal dehydration method and equipment for high-moisture sludge
  • Film pressure thermal dehydration method and equipment for high-moisture sludge
  • Film pressure thermal dehydration method and equipment for high-moisture sludge

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Embodiment 1: the membrane pressure thermal dehydration method of sludge with high water content

[0020] The process of membrane pressure heat dehydration method for sludge with high water content includes: mechanically dewatered sludge 1 passes through film cloth 2, then heat extrusion 3 after temperature adjustment and pressure adjustment 4, and finally separates dewatered water 5 and is treated After thermal dewatering sludge6.

Example Embodiment

[0021] Example 2: High water content sludge membrane pressure dehydration equipment

[0022] The working process of the high water content sludge membrane pressure dehydration equipment is as follows: fix the filter material such as 30 mesh to 60 mesh stainless steel support frame 13 on the support cavity 10, place a rigid filter material 12 on it, such as sintered metal filter material, The filter material is coated with a sludge sample 11 with a moisture content of about 80% after simple mechanical pretreatment with a thickness of less than 10mm, and then the heating chamber 9 whose outer surface size closely matches the inner size of the support chamber 10 is placed on the sludge surface , the heating temperature of the heating chamber 9 can be adjusted in different ways according to different heating methods, the pressure is adjusted by the number of pressure weights 8 placed on the weight column 7, and the extruded water filtered by the filter material 12 passes through th...

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Abstract

The invention discloses a film pressure thermal dehydration method and equipment for high-moisture sludge, and belongs to the technical field of sludge dehydration. The method is characterized by comprising the following steps of: spreading the sludge subjected to conventional mechanical dehydration into a film of 1 to 10mm, regulating hot extrusion temperature and pressure for partition wall hot extrusion dehydration, separating out moisture in a liquid form, and further applying the sludge after the moisture is separated out. The invention has the advantages that: the energy consumption is low, and the energy utilization rate is high; in the dehydration process, seamless compression is adopted, and a wall-sticking phenomenon of conventional equipment is avoided, so that the whole dehydration process is smooth and feasible; and the process flow is simple and high in feasibility, other substances are not introduced, and the further treatment and recycle of the sludge are not influenced.

Description

technical field [0001] The invention belongs to the technical field of sludge dewatering, and relates to a method and equipment for dehydrating sludge with high water content, in particular to a method and equipment for dehydrating sludge with high water content by film pressure heat. Background technique [0002] Sludge is an inevitable product of urban sewage treatment, with a water content as high as 97%. It has complex components, poor stability, and is easy to stink, so it must be treated in a timely and effective manner. Sludge contains a large amount of organic components, which can be converted into resources and utilized to achieve sustainable development. Usually, the concentrated sludge is directly treated by traditional mechanical dehydration methods, such as filter dehydration, vacuum dehydration, centrifugal dehydration, and screw press dehydration. The moisture content of the dehydrated sludge is usually about 80%, with high moisture content and large volume. ...

Claims

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Application Information

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IPC IPC(8): C02F11/12
Inventor 李爱民王伟云
Owner DALIAN UNIV OF TECH
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