Supercritical water oxidation treatment system and technology for dyeing sludge

Abstract

The invention discloses a supercritical water oxidation treatment system and technology for dyeing sludge. A sludge heater is used for preheating the sludge to reduce the viscosity of the sludge, and thus the mobility of the sludge is improved; methyl alcohol is used for auxiliary heating to serve as a system preheating heat source in the starting stage, and the problem of pipeline coking congestion caused by direct heating of materials is solved; the flowing speed of fluid is controlled to prevent solid particles from settling and causing blockage in a system conveying pipeline, and the safe reliability of operation of the system is improved. The pressure of the system is reduced in the mode of combining capillary tubes with a regulating valve, corrosion or blockage of the solid particles on a depressurizing valve under a large pressure drop condition is avoided, and the pressure of the system can be accurately controlled. Oxidation released heat of organic matter is recycled in the mode of preheating the sludge and generating steam, energy is used in a gradient mode, the energy utilization rate is maximized, and the economy of the system is improved.

Description

【Technical field】 [0001] The invention belongs to the fields of environmental protection and chemical industry, and in particular relates to a supercritical water treatment system and process. 【Background technique】 [0002] The wastewater from the textile printing and dyeing industry has a large amount of water, high chroma, large changes in water quality, and poor biodegradability. In 2013, the wastewater discharge of my country's textile printing and dyeing industry reached 2.15 billion tons, accounting for 11.2% of the industrial wastewater discharge in this year. Among them, printing and dyeing wastewater accounts for 80% of textile printing and dyeing wastewater, which is a kind of organic industrial wastewater that is difficult to treat. The traditional treatment methods for printing and dyeing wastewater mainly include physical and chemical methods and biological treatment methods. However, the main problem of the traditional treatment method is that printing and d...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a supercritical water oxidation treatment system and process of printing and dyeing sludge, which can overcome the problems of coking in the preheating stage and blockage of system pipes, equipment and system by solid particles in the design of printing and dyeing sludge supercritical water oxidation system. The problem of unreliable pressure; the invention can realize efficient, clean, low-cost and harmless treatment of printing and dyeing sludge

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