Hydrodynamic cavitation system based on negative-pressure pore plate assisted positive-pressure pore plate and method for degrading dye wastewater

Abstract

The invention relates to a hydrodynamic cavitation system based on a negative-pressure pore plate assisted positive-pressure pore plate and a method for degrading dye wastewater. According to the hydrodynamic cavitation system based on the negative-pressure pore plate assisted positive-pressure pore plate, dye wastewater is subjected to hydrodynamic cavitation degradation through a main circulating pipeline, and part of dye molecules in the wastewater are decomposed into CO2, H2O and some inorganic small molecules by high-temperature, high-pressure, hydroxyl free radicals and other active freeradicals generated by a hydrodynamic cavitation effect, so that dyes in the wastewater are degraded. The method has the innovation points that the limitation that only positive-pressure cavitation isutilized in a traditional hydrodynamic cavitation method is broken through, negative-pressure cavitation is adopted to assist positive-pressure cavitation, the degradation efficiency of the system within fixed cycle time is effectively improved, and the degradation period is shortened; the method is low in cost, simple and efficient in equipment, free of secondary pollution and suitable for large-scale treatment of dye wastewater.

Description

technical field [0001] The invention belongs to the application field of hydraulic cavitation, and in particular relates to a method for using a positive / negative pressure orifice plate as a cavitator to degrade dye wastewater under hydraulic cavitation conditions. Background technique [0002] Dyes refer to a class of organic compounds that can make other substances obtain bright and firm colors. Most of the dyes used now are industrial-grade synthetic dyes, which have the characteristics of complex structure, refractory degradation and strong persistence. As a result, printing and dyeing wastewater has the characteristics of high content of organic pollutants, high alkalinity, and large changes in water quality, and is one of the most difficult industrial wastewater to treat. Every year, millions of tons of highly colored printing and dyeing wastewater discharged from different enterprises such as plastics, textiles, leather, cosmetics, paper, printing and dye manufacturi...

AI Technical Summary

Problems solved by technology

[0004] As a new type of advanced oxidation technology for wastewater treatment, hydraulic cavitation provides the possibility for large-scale treatment of dye wastewater and low-cost investment. In order to solve the problem that a large amount of dye wast

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