A high-temperature heat pump system using water as a working medium for recovery of waste heat from industrial wastewater and its control method

Abstract

The invention provides a high-temperature heat pump system and method using water as a working medium for recovering waste heat from industrial wastewater, including an evaporator, a steam compressor, a contact condenser, a first heat exchanger, a second heat exchanger and Electric hot water tank, the steam outlet of the evaporator is connected to the inlet of the water vapor compressor, the outlet of the water vapor compressor is connected to the bottom inlet of the contact condenser, and the industrial waste water is connected to the heat exchange tube in the evaporator all the way, and flows out after preheating the makeup water by the first heat exchanger , the other way passes through the second heat exchanger to heat the make-up water, the heated make-up water is sprayed into the evaporator one way, the other way enters the electric hot water tank, and then sprayed into the contact condenser. The industrial wastewater waste heat recovery heat pump system provided by the present invention uses water as the working medium, is non-toxic, environmentally friendly and efficient, can recover the waste heat of industrial waste water above 50°C, and provides high-quality high-temperature heat for daily use with a temperature above 80°C. water.

Description

technical field [0001] The invention belongs to the field of energy saving and emission reduction of industrial machinery, refrigeration and waste heat recovery, and in particular relates to a heat pump system and a control method for recovery of waste heat from industrial waste water. Background technique [0002] With the increasingly prominent energy and environmental issues and the improvement of people's living standards, the energy consumption of industrial production processes and the impact on the environment have also been paid more and more attention. The significance and importance of energy conservation and emission reduction are particularly prominent. In industrial fields such as printing and dyeing and iron and steel, the production process needs to consume a lot of heat energy, and at the same time, industrial wastewater with a temperature higher than 50 °C is discharged. This wastewater contains a lot of waste heat, and direct discharge will also have an impa...

AI Technical Summary

Problems solved by technology

The heat pump system can be combined with many industrial productions to recover different forms of low-grade waste heat. However, due to the limitation of the heat pump working medium, the heat source temperature provided by the heat pump system often does not exceed 80°C, which cannot meet the heating needs of some industrial production. Moreover, non-natural working fluids also have temperature rise effects and environmental impacts of ozone layer destruction.

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