Seawater desalination device employing solar energy and vapor compressing distillation

Abstract

The invention relates to a seawater desalination device employing solar energy and vapor compressing distillation, belonging to the technical field of solar energy. The seawater desalination device comprises a solar collector, a first circulating pump, a heat exchanger, an evaporative condenser, a blower fan and a vacuum pump mechanism, wherein the solar collector is connected with the first circulating pump; the heat exchanger is respectively connected with the solar collector and the evaporative condenser; the evaporative condenser is connected with the blower fan; the vacuum pump mechanismis connected with the evaporative condenser; the evaporative condenser comprises an evaporation chamber and a condensation chamber; the condensation chamber is embedded into the evaporation chamber; the evaporation chamber is connected with the heat exchanger; and the position where the condensation chamber is embedded into the evaporation chamber is provided with a heat exchanging wall surface. The invention desalinates seawater in the mode of combining the solar energy and a low-pressure vapor compressing distillation seawater desalination method, reduces the pretreatment cost of seawater or brackish water, simplifies the mechanism and is also conveniently realized. The whole device is operated at the low pressure, reduces the operating temperature and improves the heat efficiency by employing the evaporative condenser to recover condensation heat.

Description

technical field [0001] The invention relates to a device in the technical field of solar energy, in particular to a solar compressed air distillation seawater desalination device. Background technique [0002] Facing the increasingly serious worldwide water shortage problem, developing seawater desalination technology and using the ocean to solve water shortage has become a choice for coastal areas. There are many methods for desalination of seawater or brackish water, but conventional methods, such as distillation, reverse osmosis and ion exchange, all require a large amount of energy consumption. With the rapid expansion of seawater desalination installed capacity, it will bring a series of environmental problems. Taking energy consumption as an example, the world currently produces about 35 million cubic meters of desalinated water per day and consumes about 300 million tons of crude oil every year. Rising international oil prices and growing concern about environmental...

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Problems solved by technology

[0003] After searching the literature of the prior art, it was found that Chinese patent application number: 200910016942.8, which discloses a solar seawater desalination device, including: a vacuum tube solar collector with a hot and cold water tank, a combined evaporative condenser, seawater Evaporators, water vapor condensers, scroll vacuum pumps, heat pump circulation systems, fresh water tanks, concentrated brine tanks, sieve plates and pressure reducing valves, although the condensation heat is recovered, the heat pump part is added, resulting in increased energy consumption, and the device become more complicated

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