Supercritical water oxidation treatment system and supercritical water oxidation treatment system process for high-concentration dyeing sludge

Abstract

The invention provides a supercritical water oxidation treatment system and a supercritical water oxidation treatment system process for high-concentration dyeing sludge. After the high-concentration dyeing sludge is ground, the particle sizes of insoluble particles are reduced, and high-flow-speed suspension conveying can be realized; the sludge is further subjected to pyrohydrolysis, cell walls are broken and the viscosity is remarkably reduced; the sludge can be stably conveyed through a high-pressure diaphragm pump and enters into a heat exchanger for preheating, so that the required temperature is reached; subsequently, the sludge and oxygen jointly enter into an inlet in the upper part of a reactor, materials completely react in the up-down flowing process, organic matters are degraded and inorganic salts are separated out; the inorganic salts are secondarily dissolved by the cooling of a small amount of reacted clean fluid introduced from an inlet in the upper part of a third heat exchanger and sludge at the inner pipe side of a fourth heat exchanger; materials flow out of a cone base at the lower part of the reactor for heating soften water to generate steam and preheating the materials; cooled and reacted fluid is decompressed through coarse adjustment of a capillary step-down transformer and fine conditions of flow; decompressed fluid is separated through a pipeline filter to obtain a solid which is finally collected into a liquid collecting tank.

Description

technical field [0001] The invention relates to the technical field of harmless treatment of printing and dyeing sludge, in particular to a supercritical water oxidation treatment system and process for printing and dyeing sludge with high concentration (10%-30% solid content). Background technique [0002] Printing and dyeing wastewater has the characteristics of large water volume, poor biodegradability, high chroma, and large water quality changes. The traditional treatment methods of printing and dyeing wastewater, including physicochemical methods and biological methods, will produce a large amount of printing and dyeing sludge, and the total sludge volume accounts for about 1–3% of the total volume of the treated wastewater (moisture content is calculated as 97%). Printing and dyeing sludge contains dyes, additives, and heavy metals. It has complex components and serious pollution. It is a hazardous waste and the treatment cost is quite high. Traditional printing and ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-concentration printing and dyeing sludge supercritical water oxidation treatment system and process, which can realize the stable transportation of high-concentration printing and dyeing sludge, and overcome the problems of SCWO system blockage and solid deposition

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