Ceramsite prepared from sludge and preparation method of ceramsite

Abstract

The invention relates to ceramsite prepared from sludge, and is characterized in that the ceramsite is prepared by uniformly mixing the following raw materials in percentage by weight and firing through at least two parallel ceramsite firing production lines: 55%-60% of municipal sludge, 30.5%-36.5% of sand washing sludge, and 8%-14% of an additive accounts, wherein the water content of the sand washing sludge is 8.5%-9.5%, the water content of the municipal sludge is 60%-70%, and the additive is kaolin, bauxite or fly ash. The proportion of the sludge in the raw materials is increased, recycling of the sludge is achieved, the problem of sludge disposal is solved, and secondary pollution of the sludge to the environment is avoided; the sand washing sludge is adopted to replace clay, so that recycling of urban spoil is achieved, the phenomenon that a large amount of urban spoil is poured about is avoided, the problem that cultivated land is damaged due to clay exploitation is avoided, farmlands are protected, and resources are saved.

Description

technical field [0001] The invention relates to ceramsite made from sludge and a making method thereof. Background technique [0002] Urban domestic sewage and industrial wastewater must be treated by sewage treatment plants, and can only be discharged after reaching the national sewage discharge standard. This is an indispensable environmental engineering measure for urban ecological environment construction. Sludge is an accessory after sewage treatment. It is an extremely complex heterogeneous body composed of organic matter, nitrogen, phosphorus, heavy metals, pathogens and ash. It is a type of extremely harmful waste. , if it is not treated and controlled thoroughly, it will cause serious secondary pollution to the environment. The amount of sludge usually accounts for 0.3%-0.5% (volume) of the amount of sewage. If advanced sewage treatment is adopted, the amount of sludge will increase by 0.5-1 times. At present, domestic sludge treatment methods mainly include landf...

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Problems solved by technology

[0003] The existing method of making ceramsite from sludge requires a large amount of clay, which will cause certain damage to the environment, and the processing efficiency of the equipment used to process sludge is low, and the crushed particle size often does not meet the standard, resulting in damage to the environment. The production quality of the follow-up ceramsite will be affected. At the same time, a large amount of dust will be generated in the process of crushing the sludge. The filter plate inside the existing filter box for filtering the dust gas is very prone to dust accumulation. The phenomenon of dust clogging reduces the efficiency of dust gas treatment and affects the treatment effect, so it needs to be improved

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