Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of urban sludge thermal insulation sintered brick and its preparation method

A thermal insulation sintering and municipal sludge technology, which is applied in the production of clay products, other household utensils, ceramic materials, etc., can solve problems such as low thermal conductivity, achieve the effects of reducing thermal conductivity, saving land resources, and reducing water absorption

Active Publication Date: 2021-07-27
SOUTHEAST UNIV
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem: The content of this invention aims at the existing solid waste sintered brick technology, and proposes to use urban sludge as the main raw material, and a large amount of sludge is used to produce a kind of urban sludge thermal insulation sintered brick with low thermal conductivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of urban sludge thermal insulation sintered brick and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of dried sludge: Put the sludge in a drying oven, dry it at 105°C for 6 hours, take it out, crush and grind it, mill it in a ball mill for 10-15 minutes, and then pass it through a 0.3mm sieve and a 1mm sieve respectively, calculated by mass percentage , Weigh the dried sludge, the powder below 0.3mm accounts for 85%, and the powder of 0.3-1mm accounts for 15%.

[0040] Preparation of the core material of sintered insulation bricks: take 0.25 parts of dregs with a particle size below 0.3mm, 0.45 parts of dry sludge, 0.1 parts of fly ash, 0.1 parts of silica fume, 0.1 parts of coal gangue, and 0.008 parts of polycarboxylate superplasticizer. After the powder material is stirred evenly, add water and stir for 4-5 minutes;

[0041] Preparation of sintered insulation brick shell material: Take 0.35 parts of dregs with a particle size below 0.3mm, 0.45 parts of dry sludge, 0.1 parts of fly ash, 0.1 parts of silica fume, 0.04 parts of borax, and 0.008 parts of pol...

Embodiment 2

[0046] The same dry sludge prepared in Example 1; sintered insulation brick core material preparation: get 0.25 parts of muck below particle size 0.3mm, 0.45 parts of dry sludge, 0.1 part of fly ash, 0.1 part of silica fume, 0.1 part of coal gangue, 0.04 part of borax, 0.008 part of polycarboxylate superplasticizer, stir the powder material evenly, add water and stir for 4-5min; prepare the shell material of sintered insulation brick, press molding, drying and sintering are the same as in Example 1 to obtain the present invention. The city sludge thermal insulation sintered brick described above.

Embodiment 3

[0048] Dry sludge prepared with Example 1; sintered insulation brick core material preparation: take 0.25 parts of muck below particle size 0.3mm, 0.45 parts of dry sludge, 0.1 part of fly ash, 0.1 part of silica fume, 0.1 part of coal gangue, 0.02 part of sodium carbonate, 0.008 part of polycarboxylate superplasticizer, stir the powder material evenly, add water and stir for 4-5 minutes; prepare the shell material of sintered insulation brick, press molding, drying and sintering are the same as in Example 1 to obtain the present invention The city sludge thermal insulation sintered brick.

[0049] The various performance parameters of the prepared urban sludge thermal insulation sintered bricks are shown in Table 1:

[0050] Table 1 Performance parameters of municipal sludge thermal insulation sintered bricks

[0051]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses an urban sludge thermal insulation sintered brick and a preparation method thereof. The porous thermal insulation brick is composed of the following raw materials: urban sludge (with a moisture content of 80%), construction waste, fly ash, silica fume, borax, Sodium carbonate, coal gangue, polycarboxylate water reducer. Using municipal sludge as the main raw material, mixed with slag, coal gangue, silica fume and fly ash, under the press, the special core-shell structure is used to coat and shape, and it is fired at 1050 ℃. A large amount of organic matter can be used as a pore-forming material. There are a large number of micropores in the sintered insulation brick, the thermal conductivity reaches 0.19456W / (m·K), and the strength grade reaches MU5.0 or more. The invention proposes the method of using urban sludge sintering to prepare thermal insulation bricks. The prepared thermal insulation bricks can maintain a certain strength while meeting the effect of thermal insulation requirements, and reduce the bulk density of the brick body, so as to realize the protection of urban sludge. resource utilization. In the harmless treatment of urban sludge, it also achieves certain economic benefits.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation material preparation, and in particular relates to an urban sludge thermal insulation fired brick and a preparation method thereof. Background technique [0002] Municipal sludge mainly includes sludge disposed of in sewage treatment plants, urban sewer pipe network sludge, and deposited sludge in factory sewage pipes. Generally, the water content is above 80%, and it contains a large amount of organic matter, as well as pathogens, viruses, heavy metals and parasites. Harmful substances such as insect eggs. At present, the output of urban sludge in my country is increasing day by day, and the sludge is placed randomly, polluting the environment. [0003] Building energy conservation is one of the current sustainable development requirements in my country. Ordinary sintered thermal insulation porous bricks have high thermal conductivity and high volume density, and use a large amount of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/13C04B33/132C04B33/135C04B33/138
CPCC04B33/1305C04B33/131C04B33/132C04B33/1321C04B33/1352C04B33/138C04B2201/20C04B2201/32C04B2201/50Y02P40/60
Inventor 王增梅周文涛杨凤鸣
Owner SOUTHEAST UNIV