Brick firing method by using domestic sludge

Abstract

The invention provides a brick firing method by using domestic sludge. The method includes the following steps that 1, several brick pillars are formed on a kiln car by using green bricks, a reservedspace is formed between every two adjacent two brick pillars, and the kiln car is sent to a high-temperature section of a brick firing tunnel kiln for sintering; 2, the domestic sludge is dried and crushed into domestic sludge powder with the water content less than 10%; 3, a number of biomass burners are installed outside the high temperature section of the brick firing tunnel kiln, spray pipes of the biomass burners are connected with the inside of the brick firing tunnel kiln, the domestic sludge powder is sprayed into the reserved space between every two adjacent two brick pillars throughthe biomass burners, the domestic sludge powder is burned after atomization and then releases heat for brick firing, and the formed inorganic ash settles on the kiln car; 4, the inorganic ash on the kiln car is collected and then mixed evenly with clay to prepare the green bricks, and the green bricks are sent to the brick firing tunnel kiln for firing to obtain sintered bricks. No odor is produced, and the energy utilization rate for the domestic sludge is relatively high.

Description

technical field [0001] The invention relates to a method for burning bricks, in particular to a method for burning bricks from domestic sludge. Background technique [0002] The existing brick-burning process of domestic sludge generally has the following two types: [0003] 1. Domestic sludge is directly mixed into clay to make bricks, which are sent to a brick-fired tunnel kiln to be fired into bricks. The disadvantages are: due to the high moisture content of domestic sludge, it is easy to decompose at low temperature, and it will decompose before entering the high-temperature section of firing. A large amount of moisture and odor are released, causing brick deformation, releasing a large amount of odor and causing air pollution, and the calorific value of the sludge has not been utilized, resulting in a small amount of admixture, and the effect of absorbing sludge is very poor. [0004] 2. First, the domestic sludge is dried and carbonized to release its moisture and mo...

AI Technical Summary

Problems solved by technology

[0003] 1. Domestic sludge is directly mixed into clay to make bricks, which are sent to a brick-fired tunnel kiln to be fired into bricks. The disadvantages are: due to the high moisture content of domestic sludge, it is easy to decompose at low temperature, and it will decompose before entering the high-temperature section of firing. A large amount of moisture and odor are released, resulting in deformation of bricks and air pollution due to the release of a large amount of odor. The calorific value of the sludge is not utilized, resulting in a small amount of admixture, and the effect of absorbing sludge is very poor.

[0004] 2. First, the domestic sludge is dried and carbonized to release its moisture and most of the organic matter to form a small amount of stable charcoal residue, and then the charcoal residue is mixed with clay to make bricks and sent to the brick-fired tunnel kiln for firing The disadvantages of brick forming are: the drying and carbonization equipment is more complicated, the odor is easy to be generated during the firing process, causing air pollution, the cost is high, and the energy utilization rate of domestic sludge is low.

This patent also has the problem that the energy utilization rate of the sludge is low, and it is easy to generate odor during the firing process.

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