JPS58156391A - Apparatus for desalinating sea water - Google Patents

Abstract

PURPOSE:To efficiently desalinate sea water over a long period of time, by providing an evaporation chamber equipped with a transparent cover body above a float body, opening the interior of the evaporation chamber to sea water, and floating a heat- absorbing body having permeability to sea water in the inner chamber of the evaporation chamber. CONSTITUTION:Sea water introduced through a connecting pipe 13 into the inner chamber 11 of a floating body 10 and having permeated a water-permeable heat- absorbing body 14 such as sponge is heated by the heat-absorbing body 14 heated by solar light streaming in an evaporation chamber 20 through a transparent cover body 21 and continuously evaporated. Steam formed by the evaporation and permeating the evaporation chamber 20 is condensed and liquefied inside the float body 10 and concurrently on the inner surface of the cover body 21 by the difference between the temps. of the outside air and the interior of the evaporation chamber 20. The resulting liquid is let flow downwards along the inner surface of the cover body 21 and the outer surface of an intermediate cover body 22 to the bottom of an outer chamber 12 and accumulated therein. When the fresh water accumulated on the bottom of the outer chamber 12 reaches a predetermined head of water, it is supplied to a reservoir 50 by the automatic operation of a valve 40.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seawater desalination device, and more specifically, a seawater desalination device that desalinates seawater using solar energy □ and wave energy. It is related to.

Conventionally used seawater desalination equipment includes equipment that uses ion exchange resin, electrolysis equipment, and evaporation equipment that uses fuel such as heavy oil, and these equipment are used depending on the purpose of use. .

However, although devices using ion exchange resins are convenient for single-term use or for desalination of relatively small amounts of seawater, they have many problems due to maintenance and other reasons when used continuously for long periods of time or for desalination of large amounts of seawater. Furthermore, the electrolysis type and evaporation type have problems such as not only requiring a very high equipment cost but also a large amount of electricity and fuel.

The present invention was developed as a result of studies to solve the above-mentioned problems.

Therefore, the object of the present invention is to create an excellent seawater desalination system that uses free energy, that is, solar energy and wave energy, and that can desalinate seawater continuously and with high efficiency over a long period of time using a device with an extremely simple structure. The objective is to provide a desalination device.

That is, the present invention forms an evaporation chamber by attaching a translucent lid to the upper part of a floating body having a double wall structure of inside and outside so as to constitute an outer chamber outside the inner chamber, In addition, the inner chamber is opened into the sea via a connecting pipe, a heat absorbing body that is submerged in seawater is suspended in the seawater introduced into the inner chamber, and a fresh water outlet is provided at the bottom of the outer chamber. An independent seawater inlet/outlet chamber is provided in the outer chamber, and a check valve is provided above the seawater inlet/outlet chamber to allow the air in the seawater inlet/outlet chamber to be discharged only to the outside world, and a check valve is provided above the seawater inlet/outlet chamber so that the air in the evaporation chamber can be sucked only into this seawater inlet/outlet chamber. By providing a check valve, the seawater introduced into the interior of the floating body is evaporated by the energy of the sun via the heat absorbing body, and it is condensed and liquefied inside the floating body, which is constantly cooled by seawater. The present invention is carried out below by using the wave motion and the movement of the floating body caused by the wave motion to reduce the pressure inside the floating body by utilizing the flow of the waves moving in and out of the seawater inlet/output chamber, thereby promoting the evaporation effect described above. A detailed explanation will be given by way of example with reference to the drawings.

The drawing is a partially sectional explanatory front view showing an embodiment of the present invention. In the figure, E denotes a seawater desalination apparatus according to an embodiment of the present invention, which is placed above the floating body 10 which has a double wall structure inside and outside so as to constitute an outer chamber 12 outside the inner chamber 11. The evaporation chamber 2 is equipped with a translucent lid 21.
0, and the inner chamber 11 is opened into the sea via the connecting pipe 13, and the seawater a introduced into the inner chamber 11 is
A heat absorbing body 14 having water permeability is suspended in the outer chamber 12, and a fresh water outlet 15 is provided at the bottom of the outer chamber 12. An independent seawater inlet/outlet chamber 30 is provided in the outer chamber, and a chamber 60 is provided above the chamber 60. It is constructed by providing a check valve 31 that can discharge the air inside only to the outside world, and a check valve 62 that can suck the air inside the evaporation chamber 20 into the seawater inlet/output chamber 30.

To further explain this structure, as shown in the figure in this embodiment, the bottom of the floating body 1° is formed in the shape of a hemisphere 5 so that it can easily sway under the influence of waves, and the inside has the above-mentioned structure. The inner chamber 11 is attached via a connecting pipe 13, and seawater can enter and exit the inner chamber 11 at all times via the connecting pipe 13. As described above, on one side of the i-chamber 12 formed on the outer periphery of the inner chamber 11, a seawater inlet/outlet chamber 60 is provided which is separated by the partition wall 63 and is independent from the outer chamber 12.

Further, a translucent intermediate lid body 22 whose upper half is cut out is attached to the upper peripheral edge of the inner chamber so as to cover this. Reference numeral 40 denotes a valve, which is attached to the lower part of the fresh water outlet 15, and is automatically activated and opened when the fresh water accumulated at the bottom of the outer chamber 12 reaches a predetermined water head, and the fresh water is placed on the seabed. The water can be supplied to a water storage tank 50.

Reference numeral 60 denotes a pressure regulating valve, which is provided on the lid 21 and is designed to automatically maintain the pressure inside the evaporation chamber 20 at a predetermined internal pressure.

In addition, 70 in the figure is an anchor, and is used to moor the present seawater desalination apparatus E at a predetermined position.

Next, a process in which seawater is desalinated by the seawater desalination apparatus E described above will be described.

Seawater introduced into the inner chamber 11 of the floating body 10 via the connecting pipe 16 and soaked into the water-permeable heat absorbing body 14 such as a sponge passes through the translucent lid 21 and enters the evaporation chamber 20. It is heated and continuously evaporated by the heat absorbing body heated by the sunlight shining through it. The water vapor that evaporates and fills the evaporation chamber 20 condenses and liquefies inside the floating body 10, which is floating in the sea and is constantly cooled by seawater. It condenses and liquefies on the inner surface, flows down the inner surface of the lid 21 and the outer surface of the intermediate lid 22 to the bottom of the outer chamber 12, and accumulates there.

On the other hand, as described above, the floating body 10 is provided with an independent seawater inlet/outlet chamber 30, and above this chamber 3o there is a check valve 31 that can discharge the air in the chamber 30 only to the outside world, and a check valve 31 in the evaporation chamber 20. Since the check valve 32 is provided to allow air to be sucked into the seawater inlet/outlet chamber 30, the wave motion and the floating body 1 due to the wave motion are
Due to the oscillation of 0, the pressure inside the floating body 10 can be automatically reduced using the waves flowing in and out of the seawater inlet/outlet chamber 60, and the above-mentioned evaporation effect can be significantly promoted.

When the required time has passed and the fresh water accumulated at the bottom of the outer chamber 12 of the floating body 10 reaches a predetermined water head, the valve 40 automatically operates, and the accumulated fresh water is delivered to the seabed via the connecting pipe 51. The water is supplied to the water storage tank 50.

If necessary, fresh water is pumped up from this water storage tank 50 via a connecting pipe 52 by a pump (not shown) for use.

Since the present invention is constructed as described above, the seawater introduced into the interior of the floating body is evaporated with high efficiency by the thermal energy of sunlight through the heat absorbing body, and is constantly cooled by the seawater. While it is possible to condense and liquefy and desalinate inside the floating body, the wave motion and the agitation of the floating body due to the wave motion can significantly promote the above-mentioned evaporation effect of seawater flowing in and out of the chamber.

Therefore, the present invention utilizes free energy, that is, solar energy and wave energy, and is capable of desalinating seawater continuously and with high efficiency over a long period of time using a device with an extremely simple structure. be.

[Brief explanation of the drawing]

The drawing is a partially sectional explanatory front view showing an embodiment of the present invention. 10...Floating body, 11...Inner room, 12...Outer room, 1
6... Connecting pipe, 14... Heat absorbing body, 15... Fresh water intake hole, 20... Evaporation chamber, 21-... Lid body, 30... Seawater inlet/outlet chamber, 61° 32... non-return valve. Agent: Patent Attorney Makoto Ogawa − Patent Attorney: Ken Noguchi Patent Attorney: Kazuhiko Saishita

Claims (1)

[Claims] An evaporation chamber is formed by attaching a translucent lid to the upper part of the floating body, which has a double-walled structure between the inside and outside to form an outside chamber outside the inside chamber, and connects the inside chamber. It opens into the sea through a pipe, and a heat absorbing body that is submersible is suspended in the seawater introduced into this inner chamber, and a freshwater outlet is provided at the bottom of the outer chamber, and an independent seawater outlet is provided in the outer chamber. An entrance/exit chamber is provided, and a check valve capable of discharging air within the seawater entrance/exit chamber only to the outside world is provided above the seawater entrance/exit chamber, and a check valve capable of sucking air in the evaporation chamber into the seawater entrance/exit chamber. A seawater desalination device.