A compressed steam capillary drive seawater desalination device

Abstract

The invention discloses a pressurized steam type capillary driven seawater desalination device, comprising a seawater desalination evaporator which sequentially comprises a seawater cavity, a porous medium, a desalinated steam passage, a heat conduction plate and a condensation cavity, wherein a desalinated steam outlet is formed in the seawater desalination evaporator and is communicated with the desalinated steam passage, the condensation cavity and a pressure reducing pipeline; an expansion valve and the pressure reducing pipeline are communicated with a heat exchanger; the pressure reducing pipeline comprises a heat exchanging pipeline; a heat working medium is filled into the heat exchanging pipeline; a hydraulic turbine is arranged on the heat exchanging pipeline; an outlet of the heat exchanger is connected with a pressure raising pipeline; and a compressor is arranged on the pressure raising pipeline and is connected with the hydraulic turbine by virtue of a connecting rod shaft. The pressurized steam type capillary driven seawater desalination device is characterized in that a condenser in the conventional desalination technology is abandoned to avoid the maximum heat loss-condensation heat loss in seawater desalination; and on the other hand, the desalination device disclosed by the invention makes use of capillary force to drive seawater for liquid refilling and does not need pumping work, and particularly, the used porous medium is a low-heat-conductivity material, so that the sensible heat loss brought away by discharge of concentrated brine is greatly reduced.

Description

technical field [0001] The invention belongs to seawater desalination technology, and in particular relates to a device for desalination of seawater by steam-pressed capillary drive with high efficiency utilizing the thermal energy and kinetic energy of waste heat working fluid in an enterprise. Background technique [0002] The method of turning seawater into freshwater is called seawater desalination, and its essence is to separate the salt and water in seawater. The minimum work of brine separation is the lower line of energy consumption for seawater desalination. Only when the separation project is completely reversible, the work consumed by separation is the minimum work. Due to the inevitable irreversibility of the actual process, the energy required for the desalination process is several times, even thousands of times, the minimum work. In order to make the desalination process more economical, try to keep the energy consumption as close as possible to the minimum w...

AI Technical Summary

Problems solved by technology

A large number of technologies tend to recycle the heat in waste steam / wastewater, but few technologies pay attention to the kinetic energy contained in waste steam / water

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