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Preparation method of clinker-free baking-free environment-friendly brick doped with sludge incineration ash

A sludge incineration, clinker-free technology, applied in cement production, sustainable waste treatment, solid waste management, etc., can solve problems such as the ineffective utilization of sludge incineration ash, the small amount of cement produced, and the impact on product performance. , to achieve the effect of good promotion and application prospects, fast turnover of brick-making process, and rapid increase in strength

Active Publication Date: 2021-11-02
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above three disposal methods, landfill treatment requires the construction of a landfill, and the sludge incineration ash has not been effectively utilized; high-temperature melting consumes a lot of heat, and requires special equipment and professionals; Adverse effects such as affecting product performance

Method used

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  • Preparation method of clinker-free baking-free environment-friendly brick doped with sludge incineration ash
  • Preparation method of clinker-free baking-free environment-friendly brick doped with sludge incineration ash
  • Preparation method of clinker-free baking-free environment-friendly brick doped with sludge incineration ash

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preparation example Construction

[0035] A method for preparing clinker-free burn-free environmentally friendly bricks by adding sludge incineration ash of the present invention is made by using the following raw materials in parts by weight:

[0036] Activated sludge incineration ash: 100 parts;

[0037] Sand: 80-120 parts;

[0038] Gravel: 50-80 parts;

[0039] Saturated lime water: 95-140 parts;

[0040] The preparation method of the clinker-free burning-free environmental protection brick mixed with sludge incineration ash comprises the following steps:

[0041] (1) Stirring of materials: weigh the above-mentioned raw materials according to the formula and pour them into a stirring pot for full stirring to obtain a uniform mixture;

[0042] (2) Compression molding: add the mixture obtained in step (1) into the mold, complete the compression molding under a pressure of 3-7 MPa, and leave the mold for 8-12 hours under standard curing conditions after demoulding;

[0043] (3) Microwave curing: Place the s...

Embodiment 1

[0066] A clinker-free burn-free environmentally friendly brick mixed with sludge incineration ash is prepared by the following process:

[0067] (1) Add 100 parts of activated sludge incineration ash (S1), 80 parts of natural sand with a fineness modulus of 2.5, 50 parts of natural graded crushed stone with a particle size of 5-10 mm and 95 parts of saturated lime water into the stirring pot and stir Uniform, saturated lime water is saturated Ca(OH) 2 solution;

[0068] (2) Add the mixture obtained in step (1) into a mold, shape it under a pressure of 3MPa, and leave it for curing for 8 hours at a temperature of 20±2°C and a relative humidity greater than 95% after demoulding;

[0069] (3) Place the sample that has been cured statically in step (2) in a microwave environment. The microwave frequency is 2400-2500MHz. Stop for 3 minutes, repeat this way 3 times; 3) 220~240W for 3 minutes, stop for 3 minutes, repeat this way 2 times.

[0070] In this way, the burn-free environ...

Embodiment 2

[0072] A clinker-free burn-free environmentally friendly brick mixed with sludge incineration ash is prepared by the following process:

[0073] (1) Add 100 parts of activated sludge incineration ash (S1), 96 parts of machine-made sand with a fineness modulus of 2.7, 67 parts of natural graded gravel with a particle size of 5-10 mm and 122 parts of saturated lime water into the stirring pot and stir Uniform, saturated lime water is saturated Ca(OH) 2 solution;

[0074] (2) Add the mixture obtained in step (1) into the mold, shape it under the pressure of 4.5 MPa, and leave it for curing for 9 hours at a temperature of 20±2°C and a relative humidity greater than 95% after demoulding;

[0075] (3) Place the sample that has been cured statically in step (2) in a microwave environment. The microwave frequency is 2400-2500MHz. Stop for 3 minutes, repeat this way 3 times; 3) 220~240W for 3 minutes, stop for 3 minutes, repeat this way 2 times.

[0076] In this way, the burn-free e...

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Abstract

The invention discloses a preparation method of a clinker-free baking-free environment-friendly brick doped with sludge incineration ash, which comprises the steps of uniformly mixing 100 parts of activated sludge incineration ash, 80-120 parts of sand, 50-80 parts of broken stone and 95-140 parts of saturated lime water, pouring the mixture into a mold, preparing a brick by adopting a pressure forming method, demolding, standing and curing, and quickly improving the strength of a brick body by adopting a microwave curing method. The method has the advantages of being high in solid waste utilization rate, high in brick body strength, high in brick making efficiency, simple in process and the like, a new technology is provided for efficient resource utilization of the sludge incineration ash, good social, environmental and economic benefits are achieved, and the industrialization prospect is good.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a method for preparing clinker-free burning-free environmental protection bricks mixed with sludge incineration ash. Background technique [0002] With the continuous advancement of my country's urbanization process, my country's sewage treatment capacity has been rapidly improved, and in the process, the sludge of sewage treatment plants has also increased significantly. Sewage treatment plant sludge is a fluid waste with a moisture content of 75% to 99% formed after multi-stage treatment in urban sewage treatment plants. It is black or dark brown, with high moisture and organic content, and is easy to rot and produce pungent stench. In addition, the sludge also contains a large number of pathogens, parasite eggs, heavy metals and a variety of harmful organic pollutants. As of the end of June 2019, more than 5,500 sewage treatment plants have been built in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B40/02
CPCC04B28/006C04B2111/00017C04B2201/50C04B14/06C04B14/02C04B22/064C04B18/023C04B22/145C04B22/124C04B24/122C04B40/0218C04B40/0281Y02W30/91
Inventor 张辰谭学军郑晓光水亮亮
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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