Heat pump seawater desalination fully-coupled circulation system and method

Abstract

The invention relates to a heat pump seawater desalination fully-coupled circulation system and method and belongs to the field of energy power. The system is characterized by further comprising a seawater desalination subsystem which comprises a seawater pump, a preheater connected with an outlet of the seawater pump, a seawater heater connected with an outlet of the preheater, a humidifying tower connected with a seawater side outlet of the seawater heater, and an evaporation condenser connected with a wet air side outlet of the humidifying tower. Heat released in the condensing process of a refrigerant is used for heating seawater, hot sea water and low-temperature saturated moist air make ful contact in the humidifying tower to complete heating and humidifying of wet air, then the high-temperature wet air releases heat in the evaporation condenser to be condensed, fresh water is separated out, and meanwhile concentrated seawater discharged out of the humidifying tower is used for preheating fed seawater. According to the heat pump seawater desalination fully-coupled circulation system and method, a compressor in a mechanical compression heat pump is fully used for inputting mechanical work, and a heat source does not need to be additionally arranged, so that the adaptability and economical efficiency of the seawater desalination system are improved, and the seawater desalination system meets the national targets of energy conservation, emission reduction and the energy and environment sustainable development strategy.

Description

technical field [0001] The invention relates to a heat pump seawater desalination fully coupled cycle system and a method thereof, which belong to the field of seawater desalination and energy power. Background technique [0002] Mechanical vapor compression heat pump technology is an energy-saving technology with significant advantages, that is, the vapor pressure of the refrigerant is increased through the compressor, and the latent heat of condensation of the high-pressure refrigerant is released to form a heating effect. Finally, the heat absorbed is evaporated in the evaporator, and re-enters the compressor to complete the thermal cycle. At the same time, for the traditional humidification and dehumidification seawater desalination thermal system, an external heat source is usually required to heat the working medium. Therefore, the seawater desalination thermal system is limited by the heat source. For the situation without a stable heat source, it cannot meet the dema...

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Problems solved by technology

At the same time, for the traditional humidification and dehumidification seawater desalination thermal system, an external heat source is usually required to heat the working medium. Therefore, the seawater desalination thermal system is limited by the heat source. For the situation without a stable heat source, it cannot meet the demand for fresh water resources in production and life. At the same time, based on The seawater desalination system with humidification and dehumidification technology discharges the concentrated hot seawater into the atmosphere, and the heat cannot be recycled, which not only seriously affects the heat energy utilization efficiency of the seawater desalination system, but also causes thermal pollution to the environment

However, the research on the use of heat pump technology to comprehensively improve the energy utilization efficiency of humidification and dehumidification seawater desalination systems has not attracted much attention.

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