Process system and method for plasma gasification of industrial sludge

Abstract

The invention discloses a process system and a method for plasma gasification of industrial sludge and belongs to the technical field of harmless disposal of industrial sludge. The process system comprises a sludge adding device, a plasma gasification system, a combustible gas combustion system and a tail gas treatment system which are sequentially connected; an additive adding device is connectedwith the sludge adding device; the plasma gasification system comprises a plasma gasifier; the combustible gas combustion system comprises a combustion tower with an oxygen supply pipeline; the tailgas treatment system comprises a tail gas cooling system and a tail gas purifying system.

Description

technical field [0001] The invention belongs to the technical field of harmless disposal of industrial sludge, and in particular relates to a process system and method for plasma gasification 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, and 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. Harmful substances, if they cannot be thoroughly disposed of, pollution will always exist. Therefore, resource disposal of industrial sludge can not only reduce land occupation, but also reduce environmental pollution. [0003] In the early days when the country did...

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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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