A kind of industrial sludge resource treatment method

Abstract

The invention discloses an industrial sludge resource treatment method, which belongs to the technical field of harmless disposal of industrial sludge, and comprises a sludge sorting and mixing step, a sludge transporting step, a hydrothermal reaction step, a plate and frame filter press dehydration step, Sludge drying steps, cracking steps, plasma gasification steps and tail gas treatment steps are a method that can effectively utilize the calorific value of sludge, recover the potential heat energy in it, recover the metal part, melt the remaining inorganic substances into glass, and convert the remaining Heavy metals are wrapped in it and can be used as building materials, avoiding the harm of heavy metals entering the water body, and basically achieving zero discharge of pollutants. Industrial sludge resource treatment method.

Description

technical field [0001] The invention belongs to the technical field of harmless disposal of industrial sludge, and in particular relates to a method for resourceful treatment of industrial sludge. Background technique [0002] Industrial sludge refers to the sludge produced by the sewage treatment station in the process of treating industrial sewage. The sludge is semi-solid or solid after flocculation and dehydration. The moisture content of the sludge is as high as 70~90%, or even higher, generally every 1000m 3 Sewage will produce nearly 5 tons of sludge. According to different types of industrial sewage, the types and amounts of toxic and harmful substances in the sludge are different. For example, most of the organic matter in the chemical wastewater, the majority of heavy metals in the electroplating wastewater, and the toxic and harmful substances in the sludge Substances, if not thoroughly disposed of, pollution will always exist. Therefore, resource disposal of in...

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Problems solved by technology

This method has an immediate effect on sludge reduction, but the incineration process consumes a lot of energy, and at the same time the incineration produces tail gas, especially the dioxins produced under medium and high temperature conditions, which are discharged into the atmosphere, which seriously affects the physical and mental health of surrounding residents. The incineration residue contains toxic and harmful substances such as heavy metals, which will cause secondary pollution when entering the landfill

[0007] Incineration solidification landfill method: The difference between incineration solidification landfill method and incineration landfill method is that after the sludge is incinerated, the residue is mixed with cement for solidification, and after solidification, it enters the landfill for landfill. This method also contains dioxins. At the same time, the solidified residue can control heavy metals from entering the groundwater in the short term, but after several years of cement curing ability failure, heavy metals will enter the groundwater again and affect the surrounding environment

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