Textile printing and dyeing wastewater treatment system and method

Abstract

The invention discloses a textile printing and dyeing wastewater treatment system and method in the technical field of textile printing and dyeing wastewater treatment. The textile printing and dyeing wastewater treatment system comprises a sewage pipeline, the sewage pipeline is connected to a printing and dyeing wastewater drainage system and comprises a fixed shaft, a power shaft is arranged on the central axis of the sewage pipeline, a water diversion protruding plate is fixedly arranged at the lower end of the power shaft, a precipitation plate with a high middle part and a low outer edge is fixedly arranged on the lower end surface of the water diversion protruding plate, and a plurality of vertical annular filter plates are rotatably connected to the upper side wall of the precipitation plate. The problems that most of existing equipment adopts an acid-adding precipitation mode, a filter plate is prone to being blocked during filtering, the treatment efficiency of textile printing and dyeing wastewater becomes lower and lower, at the moment, a filter screen in the equipment needs to be cleaned or replaced regularly, filtration is interrupted due to shutdown in the maintenance process, so that the treatment efficiency of the textile printing and dyeing wastewater is reduced, and the later maintenance cost of the equipment is increased along with cleaning and replacement of the filter plate are solved.

Description

technical field [0001] The invention relates to the technical field of textile printing and dyeing wastewater treatment, in particular to a textile printing and dyeing wastewater treatment system and method. Background technique [0002] Wastewater discharged from printing and dyeing, wool dyeing and finishing and silk factories mainly processing cotton, hemp, chemical fiber and their blended products, and silk. The type of fiber and processing technology are different, and the water quantity and quality of printing and dyeing wastewater are also different. Among them, the amount of wastewater in printing and dyeing factories is relatively large, and 1 ton of textiles for printing and dyeing consumes 100-200 tons of water, of which 80% to 90% are discharged as wastewater. Printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult indust...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of textile printing and dyeing wastewater treatment system and method, to solve the above-mentioned background technology, most of the existing equipment adopts the method of adding acid to precipitate, and then uses the filter to filter the impurities in the textile printing and dyeing wastewater, and the filtration is completed. Afterwards, the textile printing and dyeing wastewater is input to the next process through the pipeline, but the textile printing and dyeing wastewater contains a large amount of filamentous waste of printing and dyeing products, and the filter plate is easily entangled and blocked during filtration, which makes the treatment efficiency of the textile printing and dyeing wastewater more efficient. It is getting slower and slower. At this time, the filter screen in the equipment needs to be cleaned or replaced regularly. During the maintenance process, it needs to be shut down for treatment, resulting in the problem of filter interruption, which makes the treatment efficiency of textile printing and dyeing wastewater decline. At the same time, the equipment in the later stage The maintenance cost also rises with the cleaning and replacement of the filter plate

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