JP2558816B2 - Cool storage device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cold storage device that stores cold by using a gas hydrate.

(Prior Art) An example of this type of conventional cold storage device is shown in FIG.

At the time of cold storage, a wettable powder, that is, Freon, is supplied from the Freon tank 03 into the water stored in the cold storage tank 01, a supply pipe 04, a pump 05,
The water is cooled by circulating the cooling medium in the cooler 07 immersed in the water at the same time as jetting through the discharge pipe 06.

When water and chlorofluorocarbon reach a predetermined mixing ratio and the temperature of the water is cooled to about 5 ° C., as shown in FIG. 5, a sherbet in which water molecules W are bound around the chlorofluorocarbon molecule R. A gaseous hydrate (hereinafter referred to as clathrate) begins to be generated.

At the initial stage of generation of clathrate, the flon ejected from the discharge pipe 06 stirs water and the clathrate. When the clathrate grows, the stirrer 08 immersed in the water forcibly stirs and mixes the water and the clathrate. And promote the generation of clathrates.

(Problems to be Solved by the Invention) In the above-mentioned conventional device, as the clathrate grows, the discharge port of the discharge pipe 06 is blocked by the clathrate densely packed around the discharge port, and around the cooler 07. The close clathrate resistance reduces the heat transfer rate of the cooler 07, and the close clathrate hinders the supply of new freon and water around the cooler 07.

As a result, the cold storage tank 01 is separated into three layers, that is, the uppermost water layer A, the intermediate layer clathrate layer B, and the lowermost CFC layer C, and the clathrate generation efficiency decreases.

When the stirrer 08 is operated, these layers are eliminated during the operation, but when the operation is stopped, the layers are separated again into the above three layers.
Therefore, it is necessary to continuously operate the stirrer 08. Moreover, even if the stirrer 08 is upsized on a practical scale, there is a limit to the penetration force of the stirring vortex. There was a problem that power increased.

(Means for Solving the Problems) The present invention was invented to solve the above problems, and its gist is to provide a water-dispersible agent such as CFCs in water contained in a cold storage tank. In a cool storage device that supplies and cools these by generating a gas hydrate by cooling them, an upper tank by arranging a partition having a large number of small diameter holes near the bottom of the cold storage tank, A lower tank is formed thereunder, and a wettable powder discharge nozzle having a discharge port opening to the upper tank is provided in the lower tank, and the separated water extracted from the upper tank and the lower tank are provided in this nozzle. A regenerator is provided with a circulation line for supplying the extracted wettable powder.

(Operation) Since the present invention has the above-described configuration, the wettable powder is diffused into water by jetting the wettable powder from the wettable powder discharge nozzle at the beginning of the cold storage operation, and the water and the water are mixed with each other. Stir the solvate and the gas hydrate.

After a prescribed proportion of wettable powder is supplied to the water, the separated water extracted from the upper tank or the wettable powder extracted from the lower tank is supplied to the wettable powder discharge nozzle to hydrate the unreacted water. The hydrate nuclei are generated by forcibly contacting the chemicals with each other, and these are ejected from the wettable powder discharge nozzle to the upper tank to stir the inside of the regenerator tank to grow the hydrates. It promotes and prevents the cold storage tank from separating into a water tank, a gas hydrate tank and a wettable powder tank. At that time, the partition prevents the gas hydrate grown in the upper tank from flowing into the lower tank, thereby preventing the discharge port of the wettable powder discharge nozzle from being clogged with the grown gas hydrate.

(Embodiment) One embodiment of the present invention will be specifically described with reference to FIGS. 1 to 3.

A system diagram is shown in FIG. 1. In FIG. 1, reference numeral 1 is a cold storage tank, in which water is stored up to a predetermined water level. A partition 2 composed of a perforated plate having a large number of small holes, a mesh plate, etc. is arranged near the bottom of the cold storage tank 1.
The partition 2 forms an upper tank 3 above and a lower tank 4 below.

A plurality of (3 in the figure) wettable powder discharge nozzles 5 are arranged in the lower tank 4. As shown in FIG. 2, the nozzle 5 has a hollow cylindrical shape as a whole, and has a tapered surface 5b expanding toward the upper end opening 5a, a tapered surface 5d opening toward the lower end opening 5c, and these tapered surfaces. Small diameter section between 5b and 5d
A fluid passage 5f composed of 5e is provided, and the upper end opening 5a is open to the upper tank 3. The upper end opening of the rising pipe 6 inserted from the lower end opening 5c faces the small diameter portion 5e, and an annular cooling pipe 7 is arranged around the lower end opening 5c.

A cooling pipe 8 is immersed in the water in the upper tank 3, and the cooling medium flowing through the annular cooling pipe 7 flows into the cooling pipe 8. The cooling medium that has flowed through the cooling pipe 8 and has been heated is circulated to the refrigerator (not shown) via the return pipe 9, and the cooling medium cooled in the refrigerator is supplied to the cooling pipe 7 via the supply pipe 17.

The CFCs stored in the CFC tank 10 are supplied to the plurality of rising pipes 6 via the sluice valve 11, the pump 12, and the supply pipe 18.

Separated water extracted from the upper tank 3 by the plurality of water extraction lines 13 is sucked into the pump 12 via the water circulation valve 14,
The CFCs extracted from the lower tank 4 by the CFC extraction line 15 are sucked into the pump 12 via the CFC circulation valve 16.

At the start of the cold storage operation, the valves 14 and 16 are closed and the valve 11 is opened.By operating the pump 12, the fluorocarbon in the fluorocarbon tank 10 is shut off by the sluice valve 11, the pump 12, the supply pipe 18, and the rising pipe. It is jetted from the discharge port of the nozzle 5 into the water of the upper tank 3 via 6. Then, the cooling medium cooled in the refrigerator is supplied to the supply pipe.
It is circulated to the cooling pipe 7 and the cooling pipe 8 via 17.

Then, the chlorofluorocarbon ejected from the nozzle 5 diffuses into the water to generate the clathrate, and the jetting of the fluorocarbon agitates the water and the clathrate to mix them with each other.

The sluice valve 11 is closed after a predetermined proportion of CFC is supplied into the water. Then, since water and clathrate have a low specific gravity, they are collected in the upper tank 3, and CFCs are collected in the lower tank 4, because they have a high specific gravity. Therefore, the valve 14 or 16 is opened and the separated water extracted from the portion of the upper tank 3 having a low clathrate through the water extraction line 13 or the fluorocarbon extracted from the bottom of the lower tank 4 through the fluorocarbon extraction line 15 is pumped 12 , Supply pipe 18, rising pipe 6
After that, the unreacted separated water and freon are forcibly brought into contact with each other and cooled by the cooling pipe 7 to generate clathrate nuclei. Then, the inside of the cold storage tank 1 is agitated by the jet flow ejected from the nozzle 5, thereby promoting the growth of the clathrate, and
The inside of the cold storage tank 1 is prevented from being separated into a water layer, a clathrate layer, and a CFC layer. At this time, since the clathrate grown in the upper layer 3 is prevented from flowing into the lower layer 4 by the partition 2, the nozzle 5 is not clogged by the grown clathrate. Then, as shown in FIG. 2, a circulation flow m is generated by the jet flow g from the nozzle 5,
The circulating flow m containing the water and the minute clathrate is the cooling pipe 7.
After being cooled by, the non-reacted separated water or chlorofluorocarbon ejected from the rising pipe 6 comes into contact with the fluid passage 5f of the nozzle 5, so that clathrate nuclei are easily generated. Further, since a fluidly stable vortex retention region n is generated around the jet g, the growth of the clathrate is promoted here. In order to stabilize the vortex retention area n, a vortex stabilizing holder 22 may be provided as shown in FIG. In this case, when the clathrate grows above a certain size in the vortex stabilizing holder 22, it flows out by its own buoyancy. Then, the clathrate nuclei are cooled in the upper tank 3 by the cooling pipes 8 and further grow around them.

By mixing a hydrophilic solid in water in advance, a hydrated compound having a specific gravity almost the same as that of the clathrate is produced, and if it is suspended in water, the specific gravity in the cold storage tank 1 is produced as the clathrate. Since it can be kept substantially the same before and after, it is possible to suppress the upward separation of the water layer in the cold storage tank 1. Further, since the hydrated compound has a high probability of encountering the supplied flon, the production of clathrate is promoted.

(Effect of the Invention) In the present invention, by arranging a partition having a large number of small-diameter holes near the bottom of the cold storage tank, an upper tank is formed above the partition and a lower tank is formed below the partition, Since the wettable powder discharge nozzle having the discharge port opened to the upper tank is provided, the core of the gas hydrate can be generated in the lower tank and the gas hydrate can be grown in the upper tank. Then, although the inflow of water and minute gas hydrate from the upper tank is allowed, the inflow of the grown gas hydrate into the lower tank is blocked by a partition, so that the wettable powder discharge nozzle grows the gas hydrate. It can prevent clogging due to things.

Further, since the discharge port of the wettable powder discharge nozzle is open to the upper tank, water and gas hydrate in the upper tank can be effectively stirred by the jet flow discharged from this discharge port,
It does not require an agitator as in the prior art, nor does it consume power for driving this.

Further, in the present invention, since a circulating line for supplying the separated water extracted from the upper tank and the wettable powder extracted from the lower tank to the wettable powder discharge nozzle is provided, these unreacted separated water and wettable powder are The contact can be made again, and thus the production efficiency of the gas hydrate can be improved.

[Brief description of drawings]

1 to 3 show one embodiment of the present invention, FIG. 1 is a system diagram of a regenerator, and FIGS. 2 and 3 are explanatory views showing a wettable powder discharge nozzle and a flow around it. Is. FIG. 4 is a system diagram of a conventional regenerator, and FIG. 5 is a schematic diagram of a gas hydrate. Cold storage tank …… 1, partition …… 2, upper tank …… 3, lower tank ……
4, wettable powder discharge nozzle …… 5, discharge port …… 5a, separated water extraction line …… 13, wettable powder extraction line …… 15, wettable powder tank …… 10, valves …… 11, 14, 16 , Pump …… 12, supply pipe…
… 18, rising pipe …… 6, cooling pipe …… 7,8

Claims (1)

(57) [Claims] 1. A regenerator for supplying a wettable powder such as CFCs to water contained in the regenerator and cooling them to generate a gas hydrate, which is near the bottom of the regenerator. By forming a partition having a large number of small diameter holes in the upper tank and a lower tank below it, a wettable powder discharge nozzle having a discharge port opening in the upper tank is formed in the lower tank. A regenerator, which is provided and is provided with a circulation line for supplying the separated water extracted from the upper tank and the wettable powder extracted from the lower tank to the nozzle.