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Method for deeply dehydrating sludge by utilizing cullet

A technology of deep dewatering and waste glass, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of high moisture content of sludge and high moisture content of excess sludge, achieve high organic matter content, high porosity of finished products, The effect of high dehydration efficiency

Inactive Publication Date: 2013-04-03
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0006] In order to solve the problem of excessive water content in excess sludge, the present invention uses another solid waste, waste glass powder, as a conditioner for its deep dehydration, which not only solves the problem of high water content in sludge, but also solves the problem of waste glass. recycling problem

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  • Method for deeply dehydrating sludge by utilizing cullet

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Embodiment 1

[0014] Embodiment 1: A kind of method embodiment that uses waste glass to make sludge depth dehydration, see figure 1 , the method includes adding glass powder to the sludge and extruding the sludge, wherein the sludge is first added to the glass powder for conditioning before extrusion, and the steps of the sludge deep dehydration method are:

[0015] a. Add glass powder to the remaining sludge with a moisture content of about 80%, stir and mix evenly to obtain mixed sludge, and the amount of glass powder added is 10% to 50% of the total mass of the sludge;

[0016] b. Sending the mixed sludge into a filter press for extrusion and deep dehydration to obtain dewatered sludge with a moisture content lower than 45%.

[0017] In order to obtain a good sludge dehydration effect, the waste glass needs to be treated first before being added to the sludge, otherwise the desired effect cannot be achieved. Therefore, the waste glass described in this embodiment is glass powder passed t...

Embodiment 2

[0020] Referring to Example 1, the present example is a further preferred example of the content of Example 1, therefore, the method is further as follows: the remaining sludge with a moisture content of about 80% is mixed with the glass powder of 100 mesh standard sieves , in which the amount of glass powder added is 30% of the total mass of the sludge. After stirring and mixing evenly, it is sent to a filter press to obtain dewatered sludge with a moisture content of 43%.

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Abstract

A method for deeply dehydrating sludge by utilizing cullet belongs to the technical field of sludge treatment. The invention relates to a method for deeply dehydrating sludge by utilizing cullet, comprising adding glass powder to the sludge and extruding the sludge and specially comprising the steps of: a, mixing the surplus sludge with the moisture content of about 80% with the glass powder, and stirring and mixing evenly, thereby obtaining mixed sludge, wherein the mixing quantity of the glass powder is 10%-50% of the total weight of the sludge; and b, feeding the mixed sludge into a filter press for extruding and deep dehydration, thereby obtaining the dehydrated sludge with the moisture content of less than 45%. The method improves the sludge dehydration rate by mixing the glass powder; the obtained dehydrated sludge can be directly used for firing building materials such as ceramsite, bricks and the like; and the recycling problem of the cullet is solved and the purposes of turning waste into wealth and protecting the environment are achieved.

Description

technical field [0001] The invention relates to the technical field of advanced treatment of excess sludge in urban sewage treatment plants, and relates to a method for deep dehydration of sludge by using waste glass. It solves the problem of high efficiency and solves the problem of recycling waste glass. Background technique [0002] With the acceleration of urban modernization and the strengthening of people's awareness of environmental protection, more and more sewage treatment plants appear in people's lives. However, the disposal of sludge, the final product of sewage treatment, has always been a dilemma faced by various sewage plants. The proportion of its effective reuse is very small, and most of them are disposed of by landfill or incineration. [0003] At present, the annual sludge production of urban sewage treatment plants in my country is about 30 million tons (generally, the moisture content is about 80%), and it is increasing continuously. Due to the large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12
Inventor 刘永德赵继红张杰陈冰闫路兵
Owner HENAN UNIVERSITY OF TECHNOLOGY
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