High-temperature heat pump system with water as working medium for industrial wastewater waste heat recovery and control method of high-temperature heat pump system

Abstract

The invention provides a high-temperature heat pump system with water as a working medium for industrial wastewater waste heat recovery and a method. The high-temperature heat pump system with the water as the working medium for the industrial wastewater waste heat recovery comprises an evaporator, a water steam compressor, a contact type condenser, a first heat exchanger, a second heat exchangerand an electric heating water tank; a steam outlet of the evaporator is connected with an inlet of the water steam compressor, and an outlet of the water steam compressor is connected with a bottom inlet of the contact type condenser; one way of industrial wastewater is connected with a heat exchange tube in the evaporator and flows out after being preheated and supplemented through the first heatexchanger, and the other way of the industrial wastewater is heated and supplemented; and one way of the heated supplemental water is sprayed into the evaporator, and the other way of the heated supplemental water enters the electric heating water tank and then is sprayed into the contact type condenser. The industrial wastewater waste heat recovery heat pump system uses the water as the workingmedium, nontoxicity, environmental protection and high efficiency are achieved, the industrial wastewater waste heat with the temperature above 50 DEG C can be recycled, and high-quality and high-temperature hot water used for living with the temperature above 80 DEG C can be provided.

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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