Method for preparing sintered insulating bricks from undisturbed wet sludge

A wet sludge and thermal insulation brick technology is applied in the field of solid waste resource utilization and building materials, which can solve the problems of occupying large land, secondary environmental pollution, and low utilization rate of resources, reducing consumption and improving utilization level. , the effect of relieving treatment pressure

Inactive Publication Date: 2019-03-08
SHANGHAI RES INST OF BUILDING SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing sintered thermal insulation bricks from undisturbed wet sludge, so as to solve the problems of extremely low utilization rate of resources in the domestic sludge landfill process, occupying a large amount of land, and causing secondary pollution to the environment

Method used

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  • Method for preparing sintered insulating bricks from undisturbed wet sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Prepare sintered insulation bricks according to the above method, and the specific process is as follows:

[0041] In step (1), the mass percentages of each component in the mixture are: the original wet sludge accounts for 25%, the foundation pit soil accounts for 55%, and the dry powder conditioning material accounts for 20%; the moisture content of the original wet sludge is 30%, and the dry powder The regulating material is dry powder material of construction waste, with an average particle size of 0.1-2.5mm.

[0042] In step (2), the aging time of the mixture is 3 days, the aging temperature is 40-45° C., and the humidity is 75%-80%.

[0043] In step (3), the semi-hard extrusion process is used for extrusion molding, and the pressure is 2.0 MPa.

[0044] In step (4), the temperature of the drying chamber is 165-175° C., and the drying time is 2.5 hours.

[0045] In step (5), the green body is sintered in a tunnel kiln at a temperature of 900-920° C. and a sinteri...

Embodiment 2

[0047] Prepare sintered insulation bricks according to the above method, and the specific process is as follows:

[0048] In step (1), the mass percentages of each component in the mixture are: the original wet sludge accounts for 30%, the foundation pit soil accounts for 55%, and the dry powder conditioning material accounts for 15%; the moisture content of the original wet sludge is 40%, and the dry powder The regulating material is dry powder material of construction waste, with an average particle size of 0.1-2.5mm.

[0049] In step (2), the aging time of the mixture is 3 days, the aging temperature is 42-45° C., and the humidity is 75%-80%.

[0050] In step (3), the semi-hard extrusion process is used for extrusion molding, and the pressure is 2.2 MPa.

[0051] In step (4), the temperature of the drying chamber is 165-175° C., and the drying time is 3 hours;

[0052] In step (5), the green body is sintered in a tunnel kiln at a temperature of 900-920° C. and a sintering...

Embodiment 3

[0054] Prepare sintered insulation bricks according to the above method, and the specific process is as follows:

[0055] In step (1), the mass percentages of each component in the mixture are: the original wet sludge accounts for 40%, the foundation pit soil accounts for 45%, and the dry powder conditioning material accounts for 15%; the moisture content of the original wet sludge is 50%, and the dry powder The regulating material is dry powder material of construction waste, with an average particle size of 0.1-2.5mm.

[0056] In step (2), the aging time of the mixture is 4 days, the aging temperature is 40-45° C., and the humidity is 70%-80%.

[0057] In step (3), the semi-hard extrusion process is used for extrusion molding, and the pressure is 2.5 MPa.

[0058] In step (4), the temperature of the drying chamber is 165-175° C., and the drying time is 3 hours.

[0059] In step (5), the green body is sintered in a tunnel kiln at a temperature of 920-950° C. and a sintering...

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Abstract

The invention discloses a method for preparing sintered insulating bricks from undisturbed wet sludge. The method comprises the following steps: the undisturbed wet sludge with water content of 30%-50% from a sewage plant, foundation pit soil and a dry powder regulating material are mixed in a ratio, evenly stirred, and subjected to low-temperature aging, extrusion forming is performed for blank preparation, a blank is dried in a drying chamber, and the dried blank is sintered in a tunnel kiln. The moisture content of the mixture of the sludge and the foundation pit soil is adjusted by the drypowder regulating material, so that utilization of the undisturbed wet sludge in sintered bricks is realized, a new road is explored for sludge resource utilization, pressure of sludge treatment anddisposal in urban development is effectively relieved, and remarkable environmental and social benefits are achieved.

Description

technical field [0001] The invention relates to a method for preparing sintered thermal insulation bricks by using undisturbed wet sludge, and belongs to the technical fields of solid waste resource utilization and building materials. Background technique [0002] With the acceleration of urbanization in our country, the discharge of sludge from urban sewage plants has increased rapidly, and the situation of its treatment and utilization is urgent. my country has successively promulgated the Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste, and the Law of the People's Republic of China on the Promotion of Circular Economy ", "Urban Sewage Treatment Plant Pollutant Discharge Standard" (GB18918-2002) and other laws and regulations on urban solid waste treatment and disposal have largely promoted the development of sludge treatment and disposal technology. However, at present, domestic sludge is still mainly landfilled...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B33/132
CPCC04B33/13C04B33/1321C04B33/1324C04B2235/77C04B2235/96Y02P40/60
Inventor 王琼陈宁朱盛胜赵立群韩建军
Owner SHANGHAI RES INST OF BUILDING SCI CO LTD
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