Normal temperature low-pressure seawater desalination system based on ejection cavitation technology

A normal temperature, low pressure technology, applied in seawater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., to achieve stable performance, quick results, and eliminate the need for device cleaning

Pending Publication Date: 2019-06-07
WUHAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, some scholars have applied the cavitation method to water treatment, but only as an auxiliary bactericidal flocculation process, and many shortcomings in the conventional seawater desalination process still exist

Method used

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  • Normal temperature low-pressure seawater desalination system based on ejection cavitation technology
  • Normal temperature low-pressure seawater desalination system based on ejection cavitation technology
  • Normal temperature low-pressure seawater desalination system based on ejection cavitation technology

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Embodiment Construction

[0028] Below by embodiment, in conjunction with accompanying drawing, the technical scheme of the present invention is described further specifically, as Figure 1-3As shown, in the seawater circulation system, seawater passes through the water suction device 1 and the coarse filter device 2, is pressurized by the seawater working pump 3, enters the inlet pipe A501 of the ejector cavitation generator 5, and is accelerated by the nozzle A502 to form a high-speed jet flow into the suction Chamber A503, the high-speed jet forms a low pressure in the suction chamber A503, and sucks seawater through the secondary suction pipe A504, the coarse filter device 2 and the water suction device 1, and the two fluids are violently mixed and sheared in the throat steam chamber A505, At the same time, accompanied by a high flow rate, the pressure in the throat steam chamber A505 is lower than the saturated steam pressure at this time, cavitation occurs and a large amount of cavitated water vap...

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Abstract

The invention provides a normal temperature low-pressure seawater desalination system based on the ejection cavitation technology. The seawater desalination system comprises a seawater circulating system and a freshwater circulating system, wherein the seawater circulating system comprises water suction apparatuses, coarse filtration apparatuses, a seawater working pump and an ejection-type cavitation generator which are successively connected through a pipeline, the freshwater circulating system comprises a freshwater working pump, a liquid vapor jet pump and a circulating water tank which are circularly connected through a pipeline, the circulating water tank communicates with a water storage apparatus through an overflow apparatus, and the ejection-type cavitation generator in the seawater circulating system communicates with the liquid vapor jet pump in the freshwater circulating system through a filtration membrane apparatus. The system has the advantages of simple structure, lowcost, low temperature environment requirements and stable performances. Compared with a system of an existing desalination apparatus, the system simplifies and reduces the desalination treatment process. The cavitation is produced by utilizing the high-speed and low-pressure and shear-flowing of the jet flow, so that the effect of the seawater phase transformation is achieved. The temperature requirement limit of water vaporization is small, the vaporization amount is large, and the effect is reliable.

Description

technical field [0001] The invention belongs to the field of hydraulic cavitation technology and water treatment technology, and specifically designs a normal temperature and low pressure seawater desalination system based on ejection cavitation technology Background technique [0002] At present, the shortage of fresh water resources has become a global environmental problem. Seawater desalination is considered to be the most promising solution. There are many kinds of seawater desalination devices used at home and abroad. According to the different salt water separation processes, they are mainly divided into chemical methods. and physical methods. When new substances are generated during the brine separation process, the seawater desalination method is a chemical method, otherwise it is a physical method. [0003] Among the physical methods, thermal energy is used as the driving force, and those involving phase transition in the brine separation process are classified as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/08
Inventor 龙新平王炯许霜杰季斌
Owner WUHAN UNIV
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