Process system and method for cracking of industrial sludge

Abstract

The invention discloses a process system and a method for cracking of industrial sludge and belongs to the technical field of harmless disposal of industrial sludge. The process system comprises a drying system, an adding system, a cracking system, a combustible gas combustion system, a thermal energy reuse system and a tail gas treatment system; a tail slag discharging port is also connected withthe sludge cracking system; the combustible gas combustion system comprises a combustion tower with an oxygen supply pipeline; the tail gas treatment system comprises a tail gas cooling system and atail 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 cracking industrial sludge. Background technique [0002] Biochemical sludge in industrial sludge refers to the sludge produced by the biochemical treatment of industrial wastewater through the sewage treatment station. The sludge is semi-solid or solid after flocculation and dehydration. The moisture content of newly produced sludge is as high as 70-90%, or even higher. More than 50% of the dehydrated sludge is organic matter such as protein, and the rest is inorganic matter. For this kind of sludge, the common treatment methods are direct landfill method and incineration method. In the process of direct landfill method, wet sludge (with a moisture content of 70-90%) is generally directly sent to the landfill for landfill. Not only does it take up a lot of space, but also because of the high water conten...

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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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