Municipal sludge wall breaking and brickmaking method

Abstract

The invention discloses a municipal sludge wall breaking and brickmaking method. The municipal sludge wall breaking and brickmaking method comprises following steps: sludge pretreatment; sludge wall breaking and water reducing treatment; and sludge drying and brickmaking. According to the municipal sludge wall breaking and brickmaking method, a gel breaker, a dehydrating agent, a bactericidal agent, and a metal reducing agent are added into pre-treated sludge, the gel breaker and the dehydrating agent are capable of reducing sludge water content, the metal reducing agent is capable of reducingsludge mercury and heavy metal content, the bactericidal agent is capable of eliminating or reducing sludge pathogen amount and reducing organic matter content; in sludge drying process, a drying agent and an early strength agent are added, with reducing of sludge temperature, under the effect of the drying agent, evaporation of water in sludge is accelerated until sludge water content is reducedto 35 to 40%; the early strength agent is capable of converting sludge into granule states, fusion with water is not easily caused; and a baking-free brick machine is adopted for preparation of the treated sludge into baking-free bricks, so that waste utilization effect is achieved.

Description

technical field [0001] The invention relates to the field of municipal sludge treatment, in particular to a municipal sludge wall breaking and brick making method. Background technique [0002] Municipal sludge is mainly sludge from domestic sewage plants or industrial sewage plants. Sludge is solid, semi-solid and liquid waste hydrates produced by sewage plants. It contains a large amount of organic matter, rich in nutrients such as nitrogen, phosphorus and potassium, Heavy metals, pathogenic bacteria and pathogenic bacteria, etc., due to the addition of dehydrating agents and flocculants during the dewatering process of sludge, spore water is formed between sludge aggregates, and the overall shape is gelatinous. Further dehydration is very difficult, and it will not dry for several years. Sludge treatment methods mainly include landfill, incineration, low-temperature carbonization, etc., but all of these treatment methods will cause environmental pollution problems. Cont...

AI Technical Summary

Problems solved by technology

[0002] Municipal sludge is mainly sludge from domestic sewage plants or industrial sewage plants. Sludge is solid, semi-solid and liquid waste hydrates produced by sewage plants. It contains a large amount of organic matter, rich in nutrients such as nitrogen, phosphorus and potassium, Heavy metals, pathogenic bacteria and pathogenic bacteria, etc., due to the addition of dehydrating agent...

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