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Distillation desalination system and desalination method thereof for solar chimney

A solar chimney, distillation and desalination technology, applied in the field of solar energy utilization devices, can solve the problems of high unit investment cost of equipment, low fresh water output, slow evaporation rate, etc., and achieve the effect of improving energy utilization rate, enhancing evaporation effect, and simple equipment

Inactive Publication Date: 2010-03-17
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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Problems solved by technology

[0006] In view of the above prior art, the present invention provides a solar chimney distillation and desalination system, the purpose of which is to organically combine solar chimney technology, greenhouse technology, low-temperature evaporation and indirect condensation technology, thereby overcoming the disadvantages of traditional solar distillation technology. Defects such as low heat transfer efficiency, slow evaporation rate, low fresh water output, and high unit investment cost of equipment

Method used

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  • Distillation desalination system and desalination method thereof for solar chimney

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Embodiment

[0016] For this embodiment, the shape of the heat collecting shed 12 is designed to be circular, with a diameter of 400m and an area of ​​1.26×10 5 m 2 , The material can choose transparent plastic or glass. The outer edge of the heat collecting shed 12 is kept at a distance of 2 m from the ground. The heat collecting shed 12 has an installation inclination angle of 2° from the outer edge to the junction with the solar chimney 8. The solar chimney 8 is built in the center of the heat collecting shed 12 and is at a vertical inclination angle with the ground. The total height of the solar chimney 8 is 100m and the diameter is 7m. The solar chimney 8 can be constructed of reinforced concrete, masonry or plastic materials. The outer wall of the solar chimney 8 is covered with an insulating material 11 with a thickness of 20 cm. The thermal insulation material 11 can be made of polystyrene foam plastic or polyurethane foam plastic or the above composite materials. A source pool ...

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Abstract

The invention discloses a distillation desalination system for a solar chimney, comprising: the solar chimney positioned above a heat collecting shed, wherein a source water pool and a fresh water pool are arranged on the periphery of the heat collecting shed, and a concentrated brine pool is arranged right below the solar chimney; an indirect-type condenser is arranged at the top part of the solar chimney, the outer wall of the indirect-type condenser is coated with heat insulation material, a source water feeding pipeline is connected between the source water pool and an inlet of the indirect-type condenser, and a water delivery pump is arranged in the source water feeding pipeline; a nozzle used for atomizing source water is arranged in the solar chimney, a source water draining pipeline is arranged between an outlet of the indirect-type condenser and the nozzle, and the pipeline is provided with a high pressure pump; and a fresh water collecting tank is arranged below the indirect-type condenser, and the pipeline is connected between the fresh water collecting tank and the fresh water pool. Simultaneously, the invention also discloses a desalination process by using the distillation desalination system. The invention solves the technical problems such as low heat transfer efficiency, slow evaporation speed, low fresh water yield, high specific investment of equipment and the like in the conventional solar distillation technology.

Description

Technical field [0001] The invention relates to a solar energy utilization device, in particular to a novel system for desalination of seawater and brackish water by using solar chimneys. Background technique [0002] In order to increase the supply of fresh water and ease the water shortage situation, an important solution is to use desalination to produce fresh water. However, the energy consumption of desalination mainly comes from fossil fuels (such as coal, oil and natural gas), and the cost of fossil fuels The increase will offset or exceed the cost reduction of other aspects of desalination technology, thereby reducing the competitiveness of desalination water supply. In addition to this fuel cost, the greenhouse effect, air pollution and other problems it brings will be more serious. As far as our country is concerned, the vast rural areas and coastal islands that are generally short of water are mostly concentrated in areas with rich solar resources. The use of clean so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F103/08
CPCY02A20/124Y02A20/142Y02A20/212
Inventor 谢春刚吕庆春李楠谢峰张令品赵河立徐克
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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