Seawater desalting plant for solar coupled heat pump

Abstract

The invention discloses a seawater desalting plant for a solar coupled heat pump. The seawater desalting plant comprises a compressor, a throttling valve, a condenser, a solar heat collector, a heat collection circulating pump, a seawater-water heat exchanger, a heat collection valve, a seawater tank, a first seawater circulating pump, a first three-way adjusting valve, a concentrated seawater discharging valve, a concentrated seawater discharging pump, a seawater sprayer, a falling-film evaporator, a concentrated seawater collector, a second three-way adjusting valve, a fresh water discharging valve, a fresh water collector, a fin heat exchanger, a centrifugal fan, a second seawater circulating pump and a fin type evaporator. According to the seawater desalting plant for the solar coupled heat pump, disclosed by the invention, humidification and enthalpy increase for air are increased by using the falling-film evaporator; desalting treatment for wet air is realized by using cold seawater and a heat pump evaporator, and latent heat of condensation is recovered; meanwhile, the utilization rate of energy is improved, the operability of the device is widened, the consumption of the energy is reduced, and the water yield under unit electricity consumption is increased.

Description

technical field [0001] The invention relates to the field of seawater desalination, in particular to a solar-coupled heat pump seawater desalination device. Background technique [0002] Fresh water is a strategic material that human beings depend on for survival. With the development of society, people's demand for fresh water is increasing. Due to environmental pollution and over-exploitation, the global fresh water resources are becoming increasingly urgent. Seawater desalination technology has become an effective method to alleviate the pressure on water supply. [0003] At present, the world's mainstream seawater desalination technologies are reverse osmosis and multi-effect distillation, but conventional seawater desalination technologies consume a lot of electricity and fossil energy under the premise of ensuring water production. With the development of my country's marine industry, places such as ships and isolated islands that have not been fully developed are als...

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to develop a solar-coupled heat pump seawater desalination device, which utilizes a falling film evaporator to increase humidity and enthalpy of the air, and utilizes cold seawater and a heat pump evaporator to realize desalination of humid air. Desalination treatment recovers the latent heat of condensation, improves energy utilization, expands the operability of the device, reduces energy consumption, and increases water production per unit power consumption

Images