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Method for preparing ceramsite with catalyzing function through surplus sludge

A technology of excess sludge and ceramsite, which is applied in the field of preparing ceramsite with catalytic function, can solve the problems of restricting the application of biological aerated filter, the inability to apply wastewater treatment, and not being resistant to water erosion, so as to achieve easy control of the production process and benefit The effect of environmental protection and low production cost

Inactive Publication Date: 2014-09-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although ordinary ceramsite has good film-hanging performance, it has large water flow resistance, is easy to block, has poor strength, is easy to break, and is not resistant to water erosion, which limits its application to micro-pollution treatment of water source water, but not to wastewater treatment.
It is precisely because of these traditional contact fillers that there are certain defects that limit the application of biological aerated filters in wastewater treatment in my country.

Method used

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  • Method for preparing ceramsite with catalyzing function through surplus sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The process flow of a method for preparing ceramsite with catalytic function by using excess sludge provided by the invention is as follows: figure 1 As shown, the details are as follows:

[0034] (1) Put the sludge into the sludge dryer through the auger feeder for drying treatment. The moisture content of the dried sludge is controlled at about 13%, the moisture content of fly ash is 7%, and the moisture content of slag 14%;

[0035] (2) Send the dried sludge, fly ash, and slag (weight ratio 5:2:3) to the mixing crusher through the material conveyor for grinding and crushing. The crushed mixed material can pass through 100-200 head;

[0036] (3) Transport the mixed material to the forming machine, and the material is pressed into different types of ceramsite raw materials according to different molds through the hydraulic forming machine, the shape is small cylindrical, and the particle size is 3-25mm;

[0037] (4) Send the ceramsite raw material into the rotary ki...

Embodiment 2

[0040] The flow process of a method for preparing ceramsite with catalytic function by using excess sludge provided by the present invention is as follows:

[0041] (1) Put the sludge into the sludge dryer through the auger feeder for drying treatment. The moisture content of the dried sludge is controlled at about 13%, the moisture content of fly ash is 7%, and the moisture content of slag 14%;

[0042] (2) Send the dried sludge, fly ash, and slag (weight ratio 4:2:4) to the mixing crusher through the material conveyor for grinding and crushing. The crushed mixed material can pass through 100-200 head;

[0043](3) Transport the mixed material to the forming machine, and the material is pressed into different types of ceramsite raw materials according to different molds through the hydraulic forming machine, the shape is small cylindrical, and the particle size is 3-25mm;

[0044] (4) Send the ceramsite raw material into the rotary kiln for high-temperature sintering. When t...

Embodiment 3

[0047] The flow process of a method for preparing ceramsite with catalytic function by using excess sludge provided by the present invention is as follows:

[0048] (1) Put the sludge into the sludge dryer through the auger feeder for drying treatment. The moisture content of the dried sludge is controlled at about 13%, the moisture content of fly ash is 7%, and the moisture content of slag 14%;

[0049] (2) Send the dried sludge, fly ash, and slag (weight ratio 4:2:4) to the mixing crusher through the material conveyor for grinding and crushing. The crushed mixed material can pass through 100-200 head;

[0050] (3) Transport the mixed material to the forming machine, and the material is pressed into different types of ceramsite raw materials according to different molds through the hydraulic forming machine, the shape is small cylindrical, and the particle size is 3-25mm;

[0051] (4) Send the ceramsite raw material into the rotary kiln for high-temperature sintering. When ...

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Abstract

The invention discloses a method for preparing ceramsite with a catalyzing function through surplus sludge. According to the method, through different portions of the surplus sludge, coal ash and slag, a little of SiO2 and a little of Al2O3 are added to improve the performance of the ceramsite, and the prepared ceramsite has the catalyzing function through the load of reactive metal. By the adoption of the method, the prepared ceramsite is high in compressive strength and good in all performance, has the catalyzing function and serves as packing of an oxidation pond to treat printing and dyeing wastewater, so that a good effect is achieved, and biofilm formation is easy.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling for environmental protection, and in particular relates to a method for preparing ceramsite with catalytic function by using surplus sludge. Background technique [0002] The technology of preparing ceramsite from excess sludge is a way of resource utilization of excess sludge. It not only solves the pollution problem of excess sludge, but also can turn waste into wealth and receive certain economic benefits. Ceramsite is widely used in construction materials and water treatment. The invention uses residual sludge, fly ash, slag and special additives as raw materials to prepare ceramsite, and uses it as filler to treat printing and dyeing wastewater, and achieves a certain treatment effect. This technology is also an effective solidification and stabilization method that encourages heavy metals. After high-temperature sintering, heavy metals are stably fixed inside the ceramsite wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00
Inventor 李登新李玉龙纪豪李洁冰王瑾段元东吕伟史振涛尹佳音伊玉王倩高扶朋欧阳赣蔡文倍
Owner DONGHUA UNIV
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