JPH09155332A - Automatic opening/closing steam generator utilizing solar heat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply seawater without using power such as a pump, to prevent heat emission due to the discharge of seawater in a water tank outside, and operate the steam cooling equipment of an automatic opening/closing steam producer at low a cost. SOLUTION: A space above the water surface of a water tank 2 is covered with a transparent plate 9, and a water suction port 1 is formed in the side wall of the water tank 2 to make the water tank 2 communicate with the sea 4. A lid 5 which opens and closes corresponding to the change of seawater 7 or steam in the water tank 2 is installed in in the water suction port 1. Water in the water tank 2 is evaporated by solar radiation heat 8 which is transmitted into the above space in the water tank 2. Besides, steam evaporated on the water surface of the water tank 2 is introduced into a underground low temperature layer 12 by a steam discharge passage 11 to be condensed by using an underground low temperature environment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic open / close steam generator utilizing solar heat.

[0002]

2. Description of the Related Art Conventionally, in a steam generator for evaporating seawater using solar heat, as a method for supplying seawater, a pump is pumped into a water tank, or a steam generator is moored at sea, and the inside of the water tank is connected to the water tank. There is a method in which the seawater is communicated with the sea and the seawater in the water tank portion and the seawater outside are always connected.

Further, as a method of cooling the generated steam, a method of cooling the steam using seawater as a coolant, or a method of guiding the steam to a condenser having a coiled tube therein, and using the Freon gas circulating in the coiled tube as a coolant, to form the steam. Some cool.

[0004]

However, with respect to the supply of seawater, the method of pumping seawater into a water tank by using a pump requires a pump and a power source for the pump, so that the cost is high and, in addition, the inside of the water tank is increased. Every time the seawater decreases, an operation to supply seawater is required. In addition, in the method of communicating the inside of the water tank with the sea, since seawater in the water tank portion and external seawater are always connected, heat escapes to the outside of the water tank, and the temperature of the seawater in the water tank portion cannot be effectively increased. There are drawbacks.

[0005] In addition, any method of cooling water vapor requires a special power source and equipment, which has the disadvantage of increasing the cost.

The present invention has been made to solve the above-described drawbacks of the steam generator using solar heat, and supplies seawater without using a power source such as a pump, and is capable of supplying seawater in a water tank. It is an object of the present invention to provide an automatic opening / closing steam generator utilizing solar heat, which can prevent the release of heat due to outflow of seawater to the outside. In the invention of claim 3,
It is another object of the present invention to provide a cooling facility that can be implemented at low cost.

[0007]

In order to solve the above-mentioned problems, in the present invention, a water intake port communicating with the sea is provided on the side wall of the water tank, and further, in response to changes in seawater in the water tank or water vapor in the water tank. A lid that closes the water inlet that is opened and closed is provided, and the water on the water surface is heated and evaporated by the solar radiant heat transmitted into the space above the water surface of the water tank by a transparent plate that covers the space.

[0008] In the above, it is also conceivable that the lid for closing the water intake port is constituted by a valve structure which can be opened / closed in accordance with the water pressure difference on both sides of the water intake port and can be opened only toward the inside of the water tank.

It is also conceivable that the space above the water surface of the water tank and the underground low temperature tank are connected by a steam outlet passage, and the steam introduced from this outlet passage is condensed in the underground low temperature layer.

Further, it is conceivable to generate electric power by utilizing the pressure of the steam generated by the heating and evaporation.

[0011]

Since the present invention has the above structure, the supply of seawater into the water tank of the steam generator is automatically performed without using the power of a pump or the like, and the outflow of seawater in the water tank is performed. prevent. In addition to this, in the invention of claim 3, steam is cooled by utilizing a low temperature underground environment, and in the invention of claim 4, power is generated by utilizing the pressure of the generated steam.

[0012]

FIG. 1 is a sectional view of a seawater desalination apparatus according to a first embodiment. A water tank (2) having a water intake (1) is provided on land near the sea. The water inlet (1) is in communication with the sea (4) by a water suction pipe (3). A lid (5) for closing the water inlet (1) is attached to the inner wall of the water tank (2). The lid (5) is made of a rubber plate. In order to make the gravity acting on the lid (5) in seawater larger than the buoyancy acting on the lid (5), the weight (6) is
It is glued to its tip. The upper part of the lid (5) is adhered to the upper side of the water inlet (1) on the inner wall of the water tank (2), and the lid (5) is shaped so as to close the water inlet (1). ) Can be opened only in the internal orientation. Then, the water inlet (1) is opened by bending the lid (5) to the inside of the water tank (2) by a difference in water pressure on both sides of the water inlet (1) with the adhesive portion with the inner wall of the water tank (2) as a fulcrum.

By evaporation of seawater in the water tank (2), or
If the sea level becomes higher than the seawater level in the water tank (2) due to the tide, the water pressure of the water intake (1) on the water intake pipe (3) side will be increased.
(2) Since the water pressure is higher than the water pressure on the inner side, the lid (5) is opened, and seawater flows into the water tank (2) from the water suction pipe (3). And the aquarium
If the water level of the seawater (7) in (2) is equal to the sea level and the water pressure inside the water tank (2) is equal to the water pressure on the suction pipe (3), the lid
Since the gravity acting on (5) is greater than the buoyancy acting on the lid (5), the lid (5) closes and the inflow of seawater stops. After that, even if the sea level is lowered due to ebb, the lid (5) cannot be opened in the direction of the suction pipe (3), and remains closed by the water pressure in the water tank (2). Seawater does not flow.

The upper part of the water tank (2) has a solar radiation heat (8).
Is hermetically covered by a transparent plate (9) that transmits light. A steam chamber (10) is provided between the transparent plate (9) and the water surface in the water tank (2). (11) is a steam outlet passage for guiding steam generated in the water tank (2) into the low-temperature tank (12), one end of which is communicated with the steam chamber (10), and One end is open to the space above the water surface in the low-temperature tank (12) through the jet port (13). This spout (1
In 3), the inner diameter of the pipe is reduced in order to liquefy the steam well.

In the above, the seawater stored in the water tank (2) is supplied with the solar radiation heat (8) transmitted through the transparent plate (9) on the upper surface thereof.
, And evaporates to generate steam in the steam chamber (10). This water vapor is supplied to the vapor outlet passage (11) by the vapor pressure.
And, through a spout (13) attached to the tip thereof, it is spouted into a low-temperature tank (12) integrally formed with the water tank (2) in the ground directly below the water tank (2). The low-temperature tank (12) cools water vapor using a low-temperature environment in the ground where the influence of solar radiation is smaller than that on the ground. At this time, as described above,
Since the diameter of the jet port (13) is narrowed, the jetted water droplets are fragmented, and liquefaction in the low-temperature tank (12) is promoted. For this reason, it is possible to sufficiently condense in the atmosphere of the low-temperature tank (12) without using a special condenser such as a condenser.

FIG. 2 is an explanatory view of the principle of the second embodiment. A sensor (14) for detecting a vapor pressure is provided in the vapor chamber (10), and a controller (15) and an actuator (16) such as a motor are connected to the sensor (14). The seawater in the aquarium (2) decreases and the steam room (1
When the vapor pressure in 0) decreases, the sensor (14) detects it. Then, in response to the detection signal from the sensor (14), the control device (15) activates the actuator (16), and the water intake port
The valve (17) of (1) opens, and seawater flows into the water tank (2). And, by this, when the steam pressure in the steam chamber (10) rises,
In response to the detection signal from the sensor (14), the control device (15) activates the actuator (16), the valve (17) of the water inlet (1) closes, and the inflow of seawater into the water tank (2) is stopped. Stop.

FIG. 3 illustrates the principle of the third embodiment. Float the floating body (18) on the surface of the seawater (7) in the water tank (2),
It is connected to the valve (17) by a link mechanism (19). When the floating body (18) descends due to a decrease in seawater in the water tank (2), the valve (17) opens,
Seawater flows into the aquarium (2). When the seawater level in the water tank (2) rises, the floating body (18) rises and the valve (17) closes.

FIG. 4 illustrates the principle of the fourth embodiment. In this embodiment, the same lid as in Embodiment 1 is used in which the lid (5) made of a rubber plate with the weight (6) attached to the tip is attached to the upper side of the water inlet (1) of the inner wall of the water tank (2). ing. And the aquarium
The seawater stored in (2) is heated by the solar radiant heat (8) that passes through the transparent plate (9) on the upper surface of the seawater to evaporate, and steam is generated in the steam chamber (10). In the present embodiment, the steam chamber (1
The steam generated in 0) is guided to the turbine generator (22) by the steam conduit (21). Then, the steam pressure rotates the blades of the turbine to generate electricity.

FIG. 5 is an explanatory view of the principle of the fifth embodiment. In this embodiment, the sensor (14) for detecting the vapor pressure is installed in the vapor chamber.
A valve similar to that of the second embodiment, which is provided in (10), connects the control device (15) and the actuator (16) such as a motor to the sensor (14), and opens and closes the valve (17) by the actuator (16). The structure is used. The steam generated in the steam chamber (10) by the solar radiation heat (8) is the same as that in the fourth embodiment, and the steam conduit (21)
Is guided to the turbine generator (22), and the steam pressure thereof rotates the blades of the turbine to generate electricity.

FIG. 6 illustrates the principle of the sixth embodiment. In the present embodiment, the same valve structure as in the third embodiment is used in which the floating body (18) is floated on the water surface in the water tank (2) and is connected to the valve (17) by the link mechanism (19). The steam generated in the steam chamber (10) by the solar radiation heat (8) is guided to the turbine generator (22) by the steam conduit (21) in the same manner as above, and the blades of the turbine are rotated by the steam pressure. Generate electricity.

[0021]

As described above, according to the present invention, the supply of seawater to the steam generator using solar heat is automatically opened and closed according to the change in seawater or steam in the water tank. Therefore, the operation for supplying the seawater into the water tank, the pump for pumping the seawater, and the power source thereof are not required as in the related art. In addition, even if the sea level goes down after seawater supply, the water intake of the tank remains closed,
Therefore, there is no release of heat due to the outflow of seawater in the water tank, and the water temperature in the water tank can be effectively increased.

Furthermore, since the steam ejected to the low temperature tank is cooled and condensed in a low temperature environment underground, no special power source or device as in the conventional case is required, and the cost for the cooling equipment is reduced. In particular, if the underground low-temperature tank is formed integrally with the water tank directly below the water tank, the cost for the equipment is greatly reduced.

Further, if the pressure of the generated steam is used to rotate the blades of the turbine to generate electric power, power for heating and water supply unlike the conventional steam pressure generator becomes unnecessary,
Equipment and running costs for that are greatly reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a seawater desalination apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a seawater desalination apparatus according to a second embodiment.

FIG. 3 is a cross-sectional view of a seawater desalination apparatus showing a third embodiment.

FIG. 4 is a sectional view of a power generator according to a fourth embodiment.

FIG. 5 is a cross-sectional view of a power generation device showing a fifth embodiment.

FIG. 6 is a cross-sectional view of a power generation device showing a sixth embodiment.

[Explanation of symbols] (1) Water intake (2) Water tank (4) Sea (5) Lid (6) Weight (8) Solar radiant heat (9) Transparent plate (11) Steam outlet passage (12) Underground low temperature tank (17 ) Valve

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[Procedure amendment]

[Submission date] April 22, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

FIG. 3 illustrates the principle of the third embodiment. The floating body (18) is floated on the water surface of the seawater (7) in the water tank (2) and connected to the valve (17) by the link mechanism (19). When the seawater in the water tank (2) decreases and the floating body (18) descends, the valve (17) opens and the seawater flows into the water tank (2). And when the seawater level in the aquarium (2) rises,
The floating body (18) rises and the valve (17) closes. In addition,
In the above-mentioned Embodiments 1 to 3, the low temperature layer (12) is formed on the mountainside
Build below and move steam to this low temperature layer to cool
The structure, etc. are also included.

Claims (4)

[Claims] 1. A water suction port communicating with the sea is provided on a side wall of the water tank, and a lid for closing the water suction port, which opens and closes according to changes in seawater in the water tank or water vapor in the water tank, is provided above the water surface of the water tank. An automatic open / close type steam generator using solar heat, characterized in that the water on the water surface is heated and evaporated by the solar radiant heat transmitted through the transparent plate into the space. 2. The lid that closes the water intake port is formed of a valve structure that can be opened and closed according to a water pressure difference between both sides of the water intake port and that can be opened only toward the inside of the water tank. The automatic opening-and-closing steam generator using solar heat according to claim 1. 3. The space above the water surface of the water tank and the underground low temperature tank are connected by a steam outlet passage, and the steam guided from the outlet passage is condensed in the underground low temperature layer. 3. An automatic open / close type steam generator using solar heat as described in 3. 4. The automatic open / close type steam generator using solar heat according to claim 1, wherein power is generated by utilizing the pressure of steam generated by the heating evaporation.