Total heat recovery solar energy seawater desalination device

Abstract

The invention discloses a total heat recovery solar energy seawater desalination device which comprises a heating unit, a seawater desalination unit, a detection device and a solar power generation unit; the heating unit comprises a CPC solar light-gathering device and an auxiliary heater; the CPC solar light-gathering device comprises a paraboloid and a receiver; the seawater desalination unit comprises a concave container, a seawater supply pipeline, an evaporation chamber, a spherical condenser and a vacuum pump; the detection device comprises a liquid level regulating device, a temperature detection device and a pressure detection device. The device disclosed by the invention has the benefits that gathered energy and solar-thermal conversion combination are adopted for seawater desalination, so that the green and environment-friendly effects are realized; the evaporation speed is improved through reducing the seawater heat capacity and increasing the condensation area; as not only a raw material water waste heat recovery device, but also a condensed water and concentrated brine waste heat recovery device through seawater, the device realizes full heat recovery, so that the utilization rate of energy and the running temperature of the device are improved. The device disclosed by the invention is powered by solar energy without external energy, so that the use of traditional energy is reduced, and the whole device is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a solar seawater desalination device, in particular to a total heat recovery solar seawater desalination device, which belongs to the technical field of solar energy application and seawater desalination. Background technique [0002] According to statistics, my country's total water resources rank sixth in the world, but its per capita water resources are only 1 / 4 of the world's average per capita water resources. It is listed by the United Nations as one of the 13 most water-poor countries. As of 2013, among the 23 provinces and 4 municipalities directly under the central government in China, more than 10 provinces have per capita water resources below the severe water shortage line, 3 provinces are extremely short of water, and 6 provinces have per capita water resources below 200m 3 It can only maintain the minimum standard of survival, which shows that water resources are no longer an inexhaustible "gift of nature". [00...

AI Technical Summary

Problems solved by technology

[0004] At present, the problem of low output per unit area is common in solar rectifiers. It is generally believed that the reasons for the low output are: one is that the latent heat of condensation of steam is not reused, but is lost to the atmosphere through the cover plate. For example, the Chinese patent number is 201110141026.4 The patent application disclosed a solar seawater desalination device and its use method. The device uses solar energy to heat seawater into the evaporator to evaporate, and the steam enters the condenser to condense. The latent heat of condensation is not effectively used, resulting in energy waste and high energy consumption for desalination; The second is that the heat capacity of the seawater to be evaporated in the traditional solar still is too large, which limits the increase of the operating temperature, thus weakening the driving force of evaporation; the third is that the natural convection heat exchange method is adopted in the solar still, which greatly limits the distillation Improvement of device performance

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