Method for firing paving brick by recycling municipal sludge

A technology of urban sludge recycling, applied in the field of urban sludge recycling firing paving bricks, can solve the problems of high energy consumption, high cost, and not being effectively promoted, and achieve energy saving, simple method, and good society The effect of benefits and economic benefits

Inactive Publication Date: 2013-04-03
MAANSHAN HUAYU ENVIRONMENTAL PROTECTION EQUIP MFG
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Problems solved by technology

At present, using sludge incineration ash as an admixture for sintered bricks is one of the important ways to recycle urban sludge, but d

Method used

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Embodiment Construction

[0016] A method for burning paving bricks from municipal sludge, comprising the following steps:

[0017] (1) Add quicklime and 10% fly ash equivalent to 30% of the sludge weight to urban sludge with a moisture content of 80% or more, mix and stir evenly to make the moisture content ≤ 60%, and store for 7-10 days sky;

[0018] (2) Send municipal sludge with a moisture content of ≤60% into the agitator through a conveyor belt, and add straw-coated particles, gypsum, Portland cement, fluorite slag, shale, modified seawater to the agitator at the same time Paool, volcanic rock, zeolite, and coconut shell charcoal are stirred at a speed of 180r / min to form a mixed sludge evenly, and the weight parts (kg) of each raw material are as follows: 54 parts of municipal sludge, 6 parts of straw-coated particles, and 5 parts of gypsum 12 parts of Portland cement, 15 parts of fluorite slag, 7 parts of shale, 4 parts of modified sepiolite, 10 parts of volcanic rock, 25 parts o...

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Abstract

The invention discloses a method for firing a paving brick by recycling municipal sludge. In the method, raw materials for brick manufacturing comprise 50-60 parts of municipal sludge, 5-8 parts of straw coated particle, 4-6 parts of gypsum, 10-15 parts of silicate cement, 14-18 parts of fluorite slag, 5-8 parts of shale, 3-5 parts of modified meerschaum, 10-15 parts of volcanic rock, 15-25 parts of zeolite and 5-10 parts of cocoanut charcoal. The manufactured paving brick has the advantages of light weight, high strength, favorable water resistance, less deformation possibility, high safety, no pollution, environment friendliness, energy saving and the like. According to the invention, the method is simple and easy to operate, the raw materials are wide in sources, the cost is low, the energy is saved, and the casual discharge of municipal sludge is reduced, thereby achieving favorable social benefits and economic benefits.

Description

technical field [0001] The invention relates to a method for manufacturing building materials, in particular to a method for recycling urban sludge and firing paving bricks. Background technique [0002] With the acceleration of urbanization in my country, the rate of urban sewage treatment has increased year by year, and the number of urban sewage treatment plants and sludge production have also increased. At present, the amount of sludge (dry mass) discharged by urban sewage treatment plants in my country is about 1.3 million tons per year, and it is growing rapidly at an annual growth rate of 10%. Sludge pollutants have long-term toxicity and non-degradability. If they are allowed to discharge disorderly, they will become a dangerous secondary pollution source and enter the food chain through the atmosphere, groundwater, surface water, and soil, seriously threatening human health. Therefore, how to properly dispose of municipal sludge has become an issue of widespread co...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/02
CPCY02P40/69Y02P40/60
Inventor 权岚
Owner MAANSHAN HUAYU ENVIRONMENTAL PROTECTION EQUIP MFG
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