Decoloring recycling device for printing and dyeing wastewater

Abstract

The invention provides a decoloring recycling device for printing and dyeing wastewater. The device comprises an electric flocculation pond, a settling pond, a filter pond and a water storage pond. The device adopts electrochemical flocculoreaction, physical settling and efficient filtration in a combined manner and is matched with processes of circular treatment of the printing and dyeing wastewater by an online monitoring system, the printing and dyeing wastewater meets the recycling demand. A decoloring recycling method and process for printing and dyeing wastewater of the device is energy-saving and environment-friendly, can decolorize and recycle the wastewater without additionally adding a chemical reagent, can realize online monitoring of the quality of the wastewater, and intelligently selects recycling or circulating treatment according to a monitoring result. The device also has a function of automatically cleaning the filter device and can collect sludge produced in each stage in a centralized manner separately on the basis of guaranteeing repeated use of a water resource for the convenience of treatment in the later period. In addition, the whole set of system provided by the invention is simple and convenient to operate, the device is small in occupied area, and the device can be quickly and flexibly applied behind various primary treatment systems, and has good economical and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, in particular to the decolorization of printing and dyeing waste water and the reuse of middle water. Background technique [0002] The textile industry is one of the traditional pillar industries of our country. It has a development history of more than a century and is one of the industries with the longest history in our country. For a long time, the textile industry has played an important role in meeting the clothing needs of the Chinese people and the needs of industrial supplies, increasing export earnings, increasing social employment, driving related industries and promoting regional economic development. The printing and dyeing industry plays an important role in the textile industry. The printing and dyeing industry is an important industry that reflects the economic value of textile products and increases the added value of textiles. In recent years, although my country...

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Problems solved by technology

[0005] Third, the traditional filtration device is vertical or horizontal for the filtration direction of wastewater, and the water flow direction is from top to bottom, which can easily cause the filter device to be blocked. If the water flow direction is from bottom to top, additional power must be used as water filtration power. The horizontal filtration method will make the use of the filter membrane uneven, and there will be sludge accumulation in front of the filter membrane to cause its blockage. These filtration methods will reduce the life of the filter device and increase the cost of filtration.

[0006] Fourth, after a period of time, the traditional filter device will be replaced with a new filter membrane or backwashed, but replacing the new membrane will greatly increase the processing cost, and the traditional backwashing operation is generally realized by other power systems, which not only increases the processing cost cost, and more complex, time-consuming and labor-intensive

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