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Method for preparing sintered water-permeable bricks by using dredged sludge and municipal sludge

A municipal sludge and dredging technology, which is applied in applications, household utensils, clay products, etc., can solve the problems of increasing system operating costs and achieve the effect of reduction

Inactive Publication Date: 2018-02-16
HUATIAN ENG & TECH CORP MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, an additional 5% perlite needs to be added as a pore-forming agent, which objectively increases the operating cost of the system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dredging sludge is 30 parts by mass, municipal sludge is 10 parts by mass, fly ash is 40 parts by mass, clay is 20 parts by mass and water is 25 parts by mass, and the forming pressure is 20Mpa.

[0029] Grind the above four raw materials and mix them, and add water to mix the mud evenly. After the mud enters the mold, the molding pressure is 20Mpa.

[0030] The drying temperature of the billet after forming is set at 105°C.

[0031] After the drying is completed, the steps for high-temperature firing are as follows: firstly, the system is raised from room temperature to 100°C at 2°C / min, then raised from 100°C to 450°C at 1°C / min, and kept at 450°C for 1 hour , and then the system was raised from 450°C to 900°C at 1°C / min, and finally raised from 900°C to 1150°C at a rate of 1°C / 1.5min, and kept at 1150°C for 4 hours.

Embodiment 2

[0033] The difference between this embodiment and Example 1 is that the weight of raw materials is different: dredging sludge is 20 parts by mass, municipal sludge is 20 parts by mass, fly ash is 40 parts by mass, clay is 20 parts by mass and water is 25 parts by mass. The pressure is 20Mpa.

Embodiment 3

[0035] The difference between this embodiment and Example 1 is that the weight of raw materials is different: dredging sludge is 30 parts by mass, municipal sludge is 20 parts by mass, fly ash is 30 parts by mass, clay is 20 parts by mass and water is 25 parts by mass. The pressure is 20Mpa.

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Abstract

The invention discloses a method for preparing sintered water-permeable bricks by using dredged sludge and municipal sludge, and belongs to the field of solid waste treatment and building material preparation. The water-permeable bricks are prepared by performing sintering on the following raw materials in parts by mass: 20-30 parts of dredged sludge, 10-20 parts of municipal sludge, 30-40 parts of fly ash and 10-20 parts of clay. On one hand, energy contained organics in the dredged sludge and municipal sludge is utilized and energy consumption during brick sintering is reduced, and on the other hand, main solid wastes of dredged sludge and municipal sludge generated during city development are synergistically treated, and the water-permeable bricks with a wide application prospect in sponge city building are manufactured. The method is simple and reasonable in technology, easy to operate, stable and reliable in effects, and convenient to manufacture and promote in a large-scale and continuous way.

Description

technical field [0001] The invention belongs to the fields of solid waste treatment and building material production, and relates to a method for making sintered permeable bricks by using dredged sludge and municipal sludge. Background technique [0002] With the promulgation of the "Water Ten Measures", a large number of comprehensive treatment projects for black and odorous water bodies have been launched across the country, and the accompanying dredged silt disposal has attracted more and more people's attention. River silt generally contains pollutants such as heavy metals, nutrients, and refractory organic matter. [0003] Municipal sludge is a floc composed of a variety of microorganisms and a large number of organic and inorganic particles, which contains a large number of toxic and harmful substances such as pathogenic bacteria, heavy metals, and persistent organic pollutants. If the municipal sludge is not properly treated, it will have a great negative impact on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/132C04B33/135C04B33/04
CPCC04B33/04C04B33/1321C04B33/1352C04B38/0645C04B2235/6562C04B2235/6567C04B2235/661C04B2235/96Y02P40/60
Inventor 王龙
Owner HUATIAN ENG & TECH CORP MCC
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