Waste heat recovery system for printing and dyeing wastewater

Abstract

The invention provides a recovery system for waste heat of printing and dyeing wastewater. The recovery system comprises a hot wastewater collecting pool, a filter and a hot water pump, the hot water pump is used for pumping wastewater in the hot wastewater collecting pool to the filter, an output end of the filter is connected with a heat supply medium input end of a plate-type heat exchanger, a heat supply medium output end of the plate-type heat exchanger is connected to a hot wastewater storage pool or a hot wastewater treatment device, and a heat absorption medium output end of the plate-type heat exchanger is connected to a water storage or water consumption device. By modification on a wastewater collecting system, high-temperature wastewater is collected and delivered independently so as to recycle the waste heat of the printing and dyeing wastewater, and the recovery system is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the field of waste heat recovery from printing and dyeing wastewater, in particular to a waste heat recovery system from printing and dyeing wastewater. Background technique [0002] At present, environmental problems such as water use, drainage and sludge treatment in printing and dyeing enterprises are becoming more and more prominent. The environmental capacity of many developed regions of my country's printing and dyeing industry is already very limited. To achieve the goal of increasing production without increasing pollution or reducing pollution, printing and dyeing enterprises must adopt energy-saving and emission-reducing technologies , to achieve cleaner production. In the process of bleaching, dyeing and washing, printing and dyeing enterprises will produce high-temperature wastewater with a temperature as high as 80°C or higher in the processes of yarn cooking, bleaching, and high-temperature water washing. If it is ...

AI Technical Summary

Problems solved by technology

In the process of bleaching, dyeing and washing, printing and dyeing enterprises will produce high-temperature wastewater with a temperature as high as 80°C or higher in the processes of yarn cooking, bleaching, and high-temperature water washing. If it is directly discharged into the wastewater adjustment tank, the temperature of the wastewater in the treatment system will be as high as 46°C. It not only reduces the efficiency of biochemical treatment, but also causes energy waste. However, most of the existing enterprises discharge hot waste gas and hot wastewater directly. There is no energy-saving device for equipment control, and most of the printing and dyeing sludge has not been effectively treated. The task of energy conservation and emission reduction for enterprises is very arduous.

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