TW201902837A - Desalination system for salt water and method thereof - Google Patents

Abstract

A desalination system for salt water and the method thereof. The system comprises a salt water nebulization device, nebulizing the salt water under normal temperature, so as to generate a mixed mist. A fresh water condensing device, coupled to the salt water nebulization device, condensing the mixed mist into the fresh water.

Description

 Salt water desalination system and method thereof  

The present invention relates to a brine desalination system and method therefor.

The vast majority of the water on the earth is in the form of seawater, accounting for about 97%. However, seawater is salt water and cannot be used as drinking or irrigation water. In other words, fresh water naturally exists on the surface of the earth, accounting for only 3%. The form of glaciers exists, so the technology of desalinating brine to fresh water available has great application requirements.

The existing desalination technology is mainly divided into two major categories: evaporation method and membrane method. The basic principle of evaporation method is to heat the brine and collect the water mist after evaporation, including multi-effect evaporation method, multi-stage flash method and vapor compression method, but The water mist collected in this way will still have a little salt; the membrane method mainly includes reverse osmosis method and electrodialysis method. The basic principle is to filter the salt water in the semi-permeable membrane so that the salt ions in the brine are semi-permeable membrane. Blocking, through the semi-permeable membrane is fresh water, however, the size of the salt ions is very small, so the thin film method requires the use of a semi-permeable membrane with a very small hole, which is technically difficult and costly.

It is an object of the present invention to provide a desalination method.

Another object of the invention is to propose a brine desalination system.

According to the present invention, a desalination method includes atomizing brine at a normal temperature to produce a mixed mist, and condensing fresh water from the mixed mist.

The step of atomizing the brine at a normal temperature to produce a mixed mist includes pressurizing the brine and ejecting it through a plurality of spray nozzles; or shaking the brine with a plurality of ultrasonic oscillators to produce the mixed mist.

Wherein, the step of condensing fresh water from the mixed mist comprises condensing the mixed mist at a first temperature and a first pressure to collect fresh water. Preferably, the method further comprises a concentrated brine collecting step of condensing the remaining mixed mist at a second temperature and a second pressure to collect and store the concentrated brine; wherein the first temperature is different from the second temperature, the first A pressure is different from the second pressure.

According to the present invention, a brine desalination system includes a brine atomization device that atomizes the brine at a normal temperature to produce a mixed mist, and a fresh water condensation device that condenses fresh water from the mixed mist.

Wherein, the salt water atomizing device comprises a pressing device and a plurality of spray nozzles, or is realized by a plurality of ultrasonic oscillators.

In one embodiment, the fresh water condensing device includes a fresh water condensing device that condenses the mixed mist at a first temperature and a first pressure to collect fresh water. Preferably, the method further comprises a concentrated brine condensing device, comprising a concentrated brine condensing device coupled to the fresh water condensing device to condense the remaining mixed mist at a second temperature and a second pressure; wherein the first temperature and the first The second pressure is different from the second pressure.

10‧‧‧Salt atomization device

11‧‧‧ Freshwater condensation device

12‧‧‧Concentrated brine condensation device

22‧‧‧Salt atomization device

24‧‧‧ Freshwater condensation device

242‧‧‧ Freshwater condensing unit

244‧‧‧ Freshwater collection tank

26‧‧‧Concentrated brine condensation device

262‧‧‧Concentrated brine condensing device

264‧‧‧Concentrated brine collection tank

301‧‧‧Seawater filtration device

302‧‧‧Seawater storage tank

304‧‧‧Seawater pressure equipment

305‧‧‧Mixed mist collection tank

510‧‧‧Supersonic oscillator

520‧‧‧Supersonic oscillator

The first figure is a block diagram of a first embodiment of a brine desalination system according to the present invention; the second diagram is a block diagram of a second embodiment of a brine desalination system according to the present invention; and the third diagram is an embodiment of the second diagram. 4 is a block diagram of a third embodiment of a brine desalination system according to the present invention; a fifth diagram is a schematic view of another embodiment of a brine atomization device; and a sixth diagram is a fourth diagram according to the fourth figure. A flow chart of an embodiment of a brine desalination method in accordance with the present invention.

The first figure is a block diagram of a first embodiment of a brine desalination system according to the present invention, comprising a brine atomizing device 10, a fresh water condensing device 11 and a brine condensing device 12. The salt water atomizing device 10 atomizes the salt water at a normal temperature to generate a mixed mist, and then the fresh water condensing device 11 condenses fresh water from the mixed mist and collects it. Preferably, the concentrated brine condensing unit 12 includes a spiral condenser for a second condensation of the remaining mist that has passed through the fresh water condensing unit 11 to collect a higher concentration of brine than the brine initially introduced into the system.

The second figure is a block diagram of a second embodiment of a brine desalination system in accordance with the present invention, including a brine atomizing device 22, a fresh water condensing device 24, and a brine condensing device 26. In the present embodiment, the fresh water condensing device 24 includes a fresh water condensing device 242, a fresh water collecting tank 244, and a brine condensing device 26 including a brine condensing device 262 and a brine collecting tank 264. After the mixed mist generated by the brine atomizing device 22 is sent to the fresh water condensing device 24, the fresh water condensing device 242 condenses the fresh water from the mixed mist at a first temperature and a first pressure and collects it into the fresh water collecting tank 244; The remaining mist is sent to the brine condensing device 262, and a second temperature and a second pressure are applied to condense a high concentration of concentrated brine and collect it into the brine collecting tank 264. The first temperature is different from the second temperature, and the first pressure is different from the second pressure, and the first temperature, the second temperature, the first pressure, and the second pressure are set according to a dew point temperature curve.

As shown in the third figure, after the mixed mist is blown by the fan and sent to the fresh water condensing device 242, the fresh water condensing device 242 includes an exhaust fan and a condensing pipe. When the mixed mist passes through the condensing pipe, the fresh water condensing device 242 has the first temperature and the first temperature. A pressure causes the fresh water to condense and is stored in the fresh water collecting tank 244. The remaining uncondensed mist in the fresh water condensing device 24 is blown to the spiral condensing pipe and the brine condensing device 262, condensed into concentrated brine at the second temperature and the second pressure, and all other smog that is not condensed at the end causes Through a metal or other non-rusting material such as plastic defogging net, all other impurities in the remaining uncondensed mist are filtered and stored in the concentrated brine of the concentrated brine collecting tank 264, so as not to be discharged. Polluted into the atmosphere to the air. As previously mentioned, the first temperature is different from the second temperature, the first pressure being different from the second pressure.

The fourth figure is a block diagram of a front section of a third embodiment of a brine desalination system according to the present invention. In this embodiment, seawater is used as a source of brine. As shown in the figure, the seawater supplied from the water inlet is filtered by the seawater filtering device 301, stored in the seawater storage tank 302, and then the filtered seawater is pressurized by the seawater pressurizing device 304, and then passed through a plurality of fine machines. The spray nozzle is atomized into a mixed mist and concentrated in the mixed mist collecting tank 305. Thereafter, the mixed mist is subjected to the aforementioned two-stage condensation to be separately collected into fresh water and concentrated brine, and is not repeated here.

The fifth figure is a schematic view of a fourth embodiment of the present invention. In the present embodiment, the atomizing device includes ultrasonic oscillators 510 and 520. The seawater is oscillated by the ultrasonic oscillators 510 and 520 to be atomized and then blown to Fresh water collection device. In order to simplify the drawing, in this embodiment, only two seawater input ports and an ultrasonic oscillator are taken as an example, and a plurality of ultrasonic oscillating devices are disposed at each seawater input port. In other embodiments, the number of seawater input ports and The number of ultrasonic oscillators can be increased or decreased according to actual needs.

6 is a flow chart of an embodiment of a brine desalination method according to the present invention, comprising: step S601: atomizing brine at normal temperature to generate a mixed mist; step S602: condensing fresh water from the mixed mist; and step S603: Condensed brine in the remaining mist

The detailed operations of the respective steps have been described in the foregoing embodiments, and therefore are not repeated.

The foregoing description is only for the purpose of illustration, and is intended to be

Claims (11)

 A brine desalination method comprising the steps of: atomizing brine at normal temperature to produce a mixed mist; and condensing fresh water from the mixed mist.    The method of claim 1, wherein the step of atomizing the brine at ambient temperature to produce a mixed mist comprises pressurizing the brine and ejecting through a plurality of spray nozzles to produce the mixed mist.    The method of claim 1, wherein the step of atomizing the brine at ambient temperature to produce a mixed mist comprises shaking the brine with a plurality of ultrasonic oscillators to produce the mixed mist.    The method of claim 1, wherein the step of condensing fresh water from the mixed mist comprises: condensing the mixed mist at a first temperature and a first pressure to collect fresh water.    The method of claim 4, further comprising condensing the remaining mist at a second temperature and a second pressure to condense to obtain a concentrated brine, wherein the first temperature is different from the second temperature, the first pressure and the The second pressure is different.    The method of desalinating brine at normal temperature as in the first aspect of the patent application, further includes desalinating the fresh water again to obtain fresh water having a lower salt content.    A brine desalination system comprising: a brine atomization device that atomizes the brine at a normal temperature to produce a mixed mist; and a fresh water condensation device that condenses fresh water from the mixed mist.    The system of claim 7, wherein the salt water atomizing device comprises a pressurizing device and a plurality of spray nozzles.    The system of claim 7, wherein the brine atomizing device comprises a plurality of ultrasonic oscillators.    The system of claim 7, wherein the fresh water condensing device comprises: a fresh water condensing device that condenses the mixed mist at a first temperature and a first pressure; and a fresh water collecting tank for collecting and storing fresh water.    The system of claim 10, further comprising a concentrated brine condensing device coupled to the fresh water condensing device, the concentrated brine condensing device comprising: a concentrated brine condensing device coupled to the fresh water condensing device The second temperature and the second pressure condense the remaining mist to condense the concentrated brine; and a concentrated brine collecting tank for collecting and storing the concentrated brine; wherein the first temperature is different from the second temperature, the first pressure and the The second pressure is different.