Method for preparing foamed ceramics by utilizing sludge pyrolytic residues and equipment by utilizing method

A technology of foam ceramics and pyrolysis, which is applied in the field of resource utilization of solid waste, can solve the problem of high raw material cost, achieve the effects of reduced production cost, high degree of automation, and simple source of raw materials

Active Publication Date: 2017-12-05
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention makes full use of the effective elements in the sludge pyrolysis residue and uses it as the raw material of foamed ceramics. The source of raw materials is simple and the cost is low. High cost of raw materials and other issues, but also provides a new way for the resource utilization of sludge pyrolysis residue

Method used

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  • Method for preparing foamed ceramics by utilizing sludge pyrolytic residues and equipment by utilizing method
  • Method for preparing foamed ceramics by utilizing sludge pyrolytic residues and equipment by utilizing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 1 As shown, crush the sludge pyrolysis residue obtained by carbonization at 600°C for 30 minutes to make the particle size 3 In the cylindrical mold, a stable foam molding material is formed after curing. Then put the foam molding material into a curing box at 70°C for 24 hours to obtain a sintered billet; put the sintered billet into a high-temperature sintering furnace, raise the temperature to 1050°C at a rate of 5°C / min, and sinter for 30 minutes to -1 , 271.44mg·kg -1 , 0.084mg·kg -1 , 0.24mg·kg -1 , 0.029mg·kg -1 , far lower than the limit value stipulated in the national standard GB5085.3-2007 for identification of leaching toxicity, and can be used safely.

Embodiment 2

[0049] Crush the sludge pyrolysis residue obtained by carbonization at 650°C for 30 minutes to make the particle size 3 In the cylindrical mold, a stable foam molding material is formed after curing. Then put the foam molding material into a curing box at 60°C for 24 hours to obtain a sintered billet; put the sintered billet into a sintering muffle furnace, raise the temperature to 1050°C at a rate of 5°C / min, and sinter for 30 minutes. The cooling rate of -1 , 250.33mg·kg -1 , 0.077mg·kg -1 , 0.219mg·kg -1 , 0.027mg·kg -1 , far lower than the limit value stipulated in the national standard GB5085.3-2007 for identification of leaching toxicity, and can be used safely.

Embodiment 3

[0051] Pulverize the sludge pyrolysis residue obtained by carbonization at 700°C for 30 minutes to make the particle size 3 In the cylindrical mold, a stable foam molding material is formed after curing. Then put the foam molding material into a curing box at 60°C for 24 hours to obtain a sintered billet; put the sintered billet into a high-temperature sintering furnace, raise the temperature to 1050°C at a rate of 5°C / min, and sinter for 30 minutes to -1 , 229.22mg·kg -1 , 0.071mg·kg -1 , 0.20mg·kg -1 , 0.024mg·kg -1 , far lower than the limit value stipulated in the national standard GB5085.3-2007 for identification of leaching toxicity, and can be used safely.

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Abstract

The invention relates to a method for preparing foamed ceramics by utilizing sludge pyrolytic residues and equipment by utilizing the method. The method mainly comprises the following working procedures: raw material smashing, premixing, wet-method ball milling, screening, foaming, maintenance and moulding, demoulding, sintering and cooling. The invention also provides the equipment by utilizing the method for preparing the foamed ceramics by utilizing the sludge pyrolytic residues, the technological process is simple, the automation degree is high, the production process is clean, and the products are green and environmentally friendly. The method and equipment have the main advantages that the sludge pyrolytic residues are utilized as main raw materials to produce the foamed ceramics, on one hand, preparation costs of the foamed ceramics are greatly reduced, and on the other hand, a novel approach is provided for non-hazardous treatment and safe recycling of the sludge pyrolytic residues, and the method and the equipment have good environmental benefits and economic benefits.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste, in particular to a method and equipment for preparing foam ceramics from sludge pyrolysis residue. Background technique [0002] With the rapid development of the economy, the amount of raw sludge produced by urban sewage treatment plants has increased significantly, and it is expected to reach 60 million tons by 2020. How to realize the resource utilization of sludge is the focus of domestic and foreign research. Regardless of the process used, reduction, harmlessness and resource utilization of the final product are the development trends of sludge treatment. In recent years, sludge pyrolysis technology, as a relatively advanced sludge treatment technology, has attracted much attention at home and abroad. This process can realize the harmless and reduction of sludge, but the resource utilization of pyrolysis residue is still in the exploration stage. Although some...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B38/02C04B33/132C04B33/04
CPCC04B33/04C04B33/1321C04B38/02C04B38/0645C04B38/068C04B2235/96C04B2235/661C04B2235/6567C04B2235/6565C04B2235/6562C04B38/0074Y02P40/60
Inventor 余广炜李杰汪印谢胜禹汪刚马建立商晓甫
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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