Solar separating type heat pipe sea water desalting device

Abstract

The invention discloses a solar separating type heat pipe sea water desalting device which comprises a light-gathering groove, a separating type heat pipe, a low-temperature multiple-effect evaporation device, a heat exchanger, an original sea water pipeline and a sea water pump, wherein an evaporating pipe bundle positioned on the evaporating section of the separating type heat pipe is distributed on the focusing line of the light-gathering groove and forms a cavity structure, and a condensing pipe bundle positioned on the condensing section of the separating type heat pipe is distributed in a first effect device of the low-temperature multiple-effect evaporation device as a heating pipeline. According to the solar separating type heat pipe sea water desalting device, sunlight is reflected into the cavity of the evaporating section of the separating type heat pipe through the light-gathering groove, the sunlight is completely absorbed and enables a working medium inside the separating type heat pipe to vaporize, and working medium vapor rises to the condensing section and enters the condensing pipe bundle distributed in an evaporation chamber as the heating vapor source of the low-temperature multiple-effect evaporation device. The solar separating type heat pipe sea water desalting device disclosed by the invention optimizes the process of a solar sea water desalination process, has the characteristics of high solar heat-collecting efficiency, good heat-transfer property, high adaptability, high integral efficiency, easiness for operation, easiness for control, suitability for low-cost module production and the like and can be widely applied to the field of solar sea water desalination.

Description

technical field [0001] The invention belongs to the technical field of desalination of seawater or brackish water, and in particular relates to a solar energy separation heat pipe seawater desalination device. Background technique [0002] Seawater or brackish water desalination is an effective strategic way to solve the shortage of fresh water resources, and using solar energy to produce fresh water from seawater or brackish water is one of the important ways to solve the shortage or insufficient supply of fresh water. In order to improve energy utilization and device efficiency, solar energy application technology should be coupled with conventional seawater desalination technology, which is conducive to improving the overall efficiency of solar seawater desalination devices. At present, some countries in the world have some solar energy coupled with conventional seawater desalination technology systems in operation, but in these systems, the solar energy part and the seaw...

AI Technical Summary

Problems solved by technology

[0003] As the coupling of solar energy application technology and seawater desalination technology becomes closer and closer, efficient and low-cost solar desalination systems will soon appear to provide fresh water for humans on a large scale. However, in the development process of solar desalination technology, key issues still need to be solved The following problems: First, the heat collection efficiency of solar collectors is still low, which affects the large-scale engineering application of solar desalination systems; second, there are some shortcomings in the heat transfer link: currently more solar energy indirect The method of heating seawater, this method must be equipped with a hot water storage tank and a hot water heat exchange system, there is an intermediate heat exchange loss in the heat transfer process, and the thermal efficiency is low; if the method of directly heating seawater with solar energy, there is no intermediate heat exchange loss, the thermal efficiency is relatively high High, but high-temperature seawater is likely to cause problems such as corrosion and scaling of the collector, microbial growth, etc., thereby reducing the heat exchange efficiency and service life of the collector; third, the seawater desalination process still needs further improvement: currently combined with solar energy application technology Better seawater desalination technology has multi-stage flash evaporation technology and multi-effect evaporation technology. Since multi-effect evaporation technology can operate at a lower operating temperature and is applicable to a wide range of loads, it is more suitable for combination with solar energy application technology. The method of indirect heating of seawater by solar energy is generally to use the hot water in the hot water storage tank as the heating source of the multi-effect evaporation system. The heat exchange process between the heat source and the sprayed seawater must have the disadvantages of small heat transfer and large heat transfer temperature difference. The evaporation temperature and evaporation capacity of the first effect evaporation chamber are limited, which seriously restricts the increase of fresh water production; if the solar energy is used to directly heat seawater, the heated seawater must first pass through the flash chamber to obtain new steam, and then use the new steam As the heating heat source of the multi-effect evaporation system, the flash evaporation method still has the disadvantages of small concentration ratio, large amount of raw seawater, and low thermal efficiency, which not only reduces the overall efficiency of the seawater desalination system, but also increases the design size of the solar heat collection system.

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