JPS61291092A - Apparatus for desalting sea water - Google Patents

Abstract

PURPOSE:To inexpensively obtain fresh water, by vertically providing a sea water introducing pipe in an evaporation tank container and providing a water sprinking pipe provided with a large number of through-holes by drilling to said pipe while connecting a fresh water pipe to the coil in a heat exchanger outside the container. CONSTITUTION:A sea water introducing pipe 2 is vertically provided in an evaporation tank container 1 and water sprinkling pipes 3 are arranged to the pipe 2 in the horizontal direction. When a vacuum pump 10 is operated, the atmospheric pressure in the evaporation tank container 1 is lowered and sea water is sprinlked in the container from the water sprinkling pipes 3 through the sea water introducing pipe 2. The evaporation tank container 1 internally collect solar heat to effectively raise the temp. in the container and the moisture evaporated thereby reaches a heat exchange coil 8 through a fresh water pipe 9 to be cooled and successively taken out from a suction conduit 11. By this method, heat exchange is efficiently performed and capacity is excellent and operation is made easy.

Description

[Detailed description of the invention] The present invention relates to a novel seawater desalination device.

Conventionally, seawater desalination equipment uses a natural evaporation method that uses solar heat, which requires a large evaporation area, and still only uses solar heat, resulting in poor evaporation efficiency.

Another method is the reverse percolation method, which handles seawater at extremely high pressures, making the equipment complex and very expensive, resulting in high desalination costs and cumbersome operation and operation, making it less common. equipment and use are considered difficult.

The present invention aims to solve these problems by efficiently combining a closed container, a vacuum pump, and a heat exchanger to obtain fresh water in a compact, simple, and inexpensive manner. It is.

An example of the implementation of the device of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 denotes a spherical evaporation tank container which is divided into two parts, the upper half 1a of which is made of a transparent material, and the lower half 1b made of a black material or whose interior is painted black.

2 is a seawater introduction pipe installed vertically in the tank, and 3 is a sprinkler pipe installed horizontally from the pipe and has a large number of through holes.

Reference numeral 4 denotes a liquid level control switch such that an adjacent liquid level control panel 6 is operated by raising and lowering a float 5 provided on the liquid level in the container 1. 7 is a heat exchanger outer cylinder, 8 is an internal heat exchange coil, the upper end of which is connected to the fresh water pipe 9 opened at the upper part of the evaporation tank container, and the lower end communicates with the suction conduit 11 of the vacuum pump 10. It will be done.

On the other hand, I2 is a seawater storage tank, I3 is a suction pipe, and as the inside of the container 1 is vacuumed by the operation of the vacuum pump 10, the seawater in the tank 12 is sucked up through the suction pipe 13, and heat is generated. The seawater is introduced into the container 1 via the exchanger 7 and the seawater introduction pipe 2.

On the other hand, 14 is an automatic valve installed in the middle of the seawater introduction pipe 2, and when the liquid level control switch 4 is turned on and off, the liquid level control panel 6 is operated to close the automatic valve 14.
Alternatively, the amount of seawater fed into the container 1 can be adjusted by opening it.

In addition, 15 in the drawing is a starting switch.

Next, the effect will be explained.

When the vacuum pump 10 is operated, the pressure inside the evaporation tank container 1 decreases, and water is sprayed into the container from the water sprinkling pipe 3 via the seawater introduction pipe 2.

By the way, the evaporation tank container 1 collects solar heat inside through its transparent material and effectively increases the temperature inside the RFi. Therefore, the water evaporated by this is transferred to the heat exchange coil 8 through the fresh water pipe 9. Once cooled, they are sequentially taken out from the suction conduit 11.

- During the operation, the residual water level in the tank container 1 rises when the amount of seawater flowing in exceeds the amount of evaporation, and in this case, the liquid level control switch (inch 3, After step 6, the automatic valve 14 is closed and the inflow of seawater is stopped, but the vacuum pump 10 continues to operate, and the remaining water in the tank container 1 continues to evaporate from step 7, producing fresh water. When the remaining water in the tank container 1 falls below the specified water level, the liquid level control switch 4 stops operating, the automatic valve 14 opens, and the inflow of seawater begins again.

According to the device of the present invention, seawater is preheated by a heat exchanger and at the same time is efficiently heated by solar heat collected in the container. Together with this, evaporation takes place at low temperatures.
In addition, since cooling of evaporated water is efficiently carried out through heat exchange with inflowing seawater, it is a device with extremely excellent performance4.Furthermore, the overall configuration is simple and can be miniaturized, so equipment costs are minimal. It is also easy to operate.

[Brief explanation of drawings]

The drawing is a schematic explanatory diagram showing an example of the device of the present invention.

Claims (2)

[Claims] (1) Consists of a combination arrangement of an evaporation tank, a heat exchanger, a vacuum pump, etc. A seawater introduction pipe is installed vertically inside the evaporation tank, and a sprinkler pipe with many through holes is installed in this. On the other hand, the fresh water pipe connected open to the upper part of the container is connected to the coil in the heat exchanger outside the container, and the lower part is connected to the suction conduit of the vacuum pump, and on the other hand, a liquid level control switch is attached to the bottom of the container, and the above-mentioned In addition to installing an automatic valve operated by the liquid level control switch in the middle of the seawater introduction pipe, a vacuum pump is operated to send the seawater sucked up through the heat exchanger outer cylinder into the container, and to prevent evaporation within the container. A seawater desalination device characterized by the fact that water passes through a freshwater pipe to a heat exchange coil, where it is cooled and taken out. (2) Claim 1, characterized in that the evaporation tank container is formed into a spherical shape divided into upper and lower parts, the upper half is made of transparent material, and the lower half is made of black material or the inner surface is painted black. seawater desalination equipment.