Solar seawater desalination device

Abstract

The invention discloses a solar seawater desalination device, which comprises a vacuum tube type solar heat collector with cold and hot water tanks, a combined evaporative condenser, a seawater evaporator, a vapor condenser, a scroll vacuum pump, a heat pump circulation system, a fresh water tank, a strong brine tank, a sieve plate, a pressure reducing valve and the like. The device adopts the scroll vacuum pump to obtain higher negative system pressure to reduce the evaporation temperature of seawater; between the seawater evaporator and the vapor condenser, the heating cycle of a heat pump is utilized to supply the latent heat released by vapor condensation to the seawater evaporator and provide the heat for the evaporation of the seawater, and the device fully and effectively recovers the latent heat of condensation of water vapor; and the combined evaporative condenser is adopted to ensure that the seawater can be immediately condensed after the evaporation of the seawater and reduce the load of the vacuum pump. The device has the advantages of high efficiency, low energy consumption, compact structure, high fresh water yield and the like, and is suitable to solve the water drinking problem in water-deficient areas and the water drinking problem of operating personnel on ships and offshore platforms all year round.

Description

technical field [0001] The invention relates to a solar-powered seawater desalination device, in particular to a solar-powered seawater desalination production device that uses a scroll vacuum pump to realize negative pressure evaporation, uses a heat pump to recycle latent heat of condensation, and uses a combined evaporative condenser, which belongs to solar photothermal technology The technical field of seawater desalination (salt water desalination). Background technique [0002] Fresh water is one of the basic substances for the survival and development of human society. Most of the water on the earth is seawater that cannot be directly drunk or irrigated because of its high salinity. Rivers, lakes and groundwater available for direct use by humans are less than 0.36%. China's per capita water resources are scarce, especially some islands, coastal saline-alkali areas and inland brackish water areas are all areas lacking fresh water. Solving the shortage of fresh water ...

AI Technical Summary

Problems solved by technology

The condensation chamber is composed of reflectors, cooling walls and seawater input pipes, and the water vapor evaporated by sunlight is quickly condensed to obtain pure fresh water. This device has a simple structure and does not require any power equipment and heat collection equipment. Lower, but its operating temperature is low, it occupies a large area, and its efficiency and fresh water output per unit heat collecting area are low

The Chinese patent No. CN03142188.1 discloses a negative pressure seawater desalination method and its equipment. Seawater is deposited and filtered into a closed container, and then the remaining air in the container is extracted to generate low pressure in the container. , the boiling point of water is lowered to boil at normal temperature, the water vapor is drawn out and passed into liquid water to make it miscible, and fresh water is obtained; this seawater desalination device has the advantages of small footprint, no influence of weather, and simple production process And long service life of the equipment, etc., but to make seawater boil at room temperature, a high degree of vacuum is required, which requires high performance of the vacuum pump, and this method requires the vacuum pump to pump all the water vapor, the load of the vacuum pump is large, and the water vapor The utilization rate of the latent heat of condensation is low, so the thermal efficiency of the device is low

The Chinese invention patent with t...

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