JPH04338231A - Decompressed vaporization cooler - Google Patents

Abstract

PURPOSE:To quickly change a cooling temperature of vaporization without causing delay in time. CONSTITUTION:The ejector 32 of a combination pump 22 is connected to the jacket part 5 of a reaction pot 21. The ejector 32 and tanks 1, 2 are connected via valves 51, 52. A cooling water supply passage 28 is communicated with the tanks 1, 2. The tanks 1, 2 are each communicated with the pump 30 via valve means 8, 9. From the colling water supply passage 28, via the valve 63, a cooling water supply pipe 26 is diverged and connected with the jacket part 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for evaporative cooling of objects to be cooled by reducing the pressure within a cooling chamber. Specifically, the present invention relates to a cooling device for a reaction vessel in which various reactions are carried out, an evaporative cooling device for foods, etc.

0002

2. Description of the Related Art A conventional cooling device for a reaction vessel is disclosed in, for example, Japanese Unexamined Patent Publication No. 1-315336. This consists of a combination pump that combines an ejector, a tank, and a pump, a switching valve that can supply part of the water discharged from the combination pump to the fluid chamber of the reaction vessel, and a temperature control that controls the temperature of the fluid passing through the ejector. The reactor is evaporatively cooled by supplying water discharged from a cooling combination pump to the fluid chamber of the reactor. The suction force, that is, the degree of reduced pressure generated in the ejector becomes the saturation pressure for the temperature of the fluid passing through the ejector, increasing the degree of reduced pressure in the ejector, which in turn increases the degree of reduced pressure in the cooling chamber to further promote evaporative cooling. This can be achieved by lowering the temperature of the fluid passing through the ejector using a temperature control section.

0003

[Problems to be Solved by the Invention] The above-mentioned conventional method has the problem of a time delay occurring when changing the degree of pressure reduction and changing the degree of evaporative cooling. In the reaction vessel,
It is necessary to precisely control the temperature during the reaction process, and if a time delay occurs, the reactants may deteriorate or be damaged. This time delay is caused by the inability to quickly change the temperature of the fluid passing through the ejector. That is, in the conventional system described above, cooling water is supplied to the tank from the temperature control section, and only after the temperature of the fluid in the tank decreases will the temperature of the fluid passing through the ejector also decrease, so the water temperature in the tank is adjusted. It takes time to
This causes delays.

[0004] Accordingly, the technical object of the present invention is to provide a reduced pressure evaporative cooling device that can change the degree of evaporative cooling, that is, the cooling temperature, without causing a time delay.

[0005]

[Means for Solving the Problems] The structure of the reduced pressure evaporative cooling device of the present invention is as follows. In an evaporative cooling device consisting of a combination pump that combines an ejector, a tank, and a pump, an evaporative cooling chamber communicating with the ejector, and a cooling water supply passage that supplies cooling water to the tank, a plurality of tanks are arranged, and each A cooling water supply passage is connected to the tank and communicated with the pump via valve means.

[0006]

[Operation] By supplying the fluid in the tank to the ejector using a pump, the ejector section achieves a saturated pressure according to the fluid temperature, and by lowering the fluid temperature to 100 degrees or less, it is possible to create a reduced pressure state below atmospheric pressure. . When the pressure is reduced in the ejector, the communicating evaporative cooling chamber is also reduced in pressure, and the cooling water is vaporized to evaporatively cool the object to be cooled. The steam that has been vaporized by removing heat is sucked into the ejector and reaches one tank. The steam is liquefied by the cooling water in the tank and supplied to the ejector by a pump. When changing the vaporization temperature, that is, when changing the degree of pressure reduction, the valve means is operated to connect the other tank and the pump. By storing cooling water at a temperature corresponding to the desired degree of decompression in this other tank,
Fluid at the required temperature is quickly supplied to the ejector section to generate the desired suction force, that is, the degree of reduced pressure.

[0007]

[Embodiment] The illustrated embodiment will be explained in detail. In this example, an example is shown in which a reaction vessel is used as the evaporative cooling device. Reaction vessel 21 equipped with a jacket section as a vaporization cooling chamber
, the combined pump 22, the tanks 1 and 2, and the cooling water supply passage 28 constitute a reduced pressure evaporation cooling device. Reaction pot 2
1 forms a jacket part 5 over almost the entire circumference, and is equipped with a raw material inlet 3, a product outlet 4, a stirrer 6, and a temperature sensor 20 for detecting the temperature of the object to be cooled.
Cooling water supply ports 5a, 5b and a fluid discharge port 7 are provided in the cooling water supply port 5a and 5b.

In the combination pump 22, a pump 30 has a suction side connected to the tanks 1 and 2 and a discharge side connected to a nozzle 33 of an ejector 32, and a diffuser 34 of the ejector 32 connects the tank 1 through valves 51 and 52. , 2, and the ejector 32 and the fluid discharge port 7 of the reaction vessel 21 are connected via the valve 10 and the trap 12. This combination pump 22 is configured to supply the water in the tank 1 or 2 to the ejector 32 by operation of the pump 30, apply suction thereto, and return the water to the tank 1 or 2.

The cooling water supply passage 28 is provided to control the water temperature in the tank 1 or 2, and is controlled by supplying cooling water into the tank 1 or 2 through the valves 53, 55, 56. It is meant to be controlled. tank 1
Alternatively, 2 includes water level sensors 57, 58, 59, 60 and a temperature sensor 6 that detect the respective water levels and fluid temperatures.
Attach 1,62. Tanks 1,2 communicate with pump 30 via valve means 8,9.

A cooling water supply pipe 26 is attached from the cooling water supply passage 28 to the jacket portion 5 via a valve 63.

A part of the passage connecting the pump 30 and the ejector 32 is branched and an excess water discharge valve 25 is installed, and the water level sensor 57, 58, 59, 60 in the tanks 1 and 2 causes and 2 to maintain the water level within a predetermined range. Although not shown, each valve and sensor may be connected to a control unit for centralized control.

When cooling the object to be cooled, that is, when performing evaporative cooling in the jacket section 5, cooling water is supplied from the cooling water supply passage 28 into the tank 1 through the valves 53 and 55, and at the same time, the cooling water is supplied through the valve 63. Cooling water is also supplied to the jacket part 5. In this case valves 9, 52, 56 are closed and valves 8, 10, 5
Leave 1 open. The fluid in the tank 1 reaches the ejector 32 by the pump 30 and generates a suction force. Due to the suction force of the ejector 32, the inside of the jacket portion 5 is also brought into a reduced pressure state, and the cooling water is vaporized by the heat of the object to be cooled, thereby cooling the object. The vaporized steam passes through the valve 10, is sucked into the ejector 32, and reaches the tank 1.

[0013] In order to change the degree of cooling, the jacket part 5
When changing the degree of pressure reduction in the tank 2, fluid at the corresponding temperature is stored in the tank 2 in advance, and by operating the valves 8, 9, 51, and 52, the fluid at the desired temperature in the tank 2 is supplied to the ejector 32. This allows for quick changes.

In this embodiment, one pump 30 is used for the tanks 1 and 2, but a plurality of pumps suitable for the temperature of the fluid may be installed in each tank 1 and 2, for example. You can also do that.

In this embodiment, by branching the passage from the pump 30 to the ejector 32 and providing a valve 67, a portion of the water discharged from the pump 30 is supplied to the jacket portion 5 from the cooling water supply port 5b. It can also be cooled down.

Furthermore, in this embodiment, by providing a heating steam supply passage 68 via a valve 69, not only vacuum vaporization cooling but also vacuum steam heating or positive pressure steam heating can be performed.

[0017]

[Effects of the Invention] The present invention has the following effects. By storing fluid at a temperature corresponding to the required degree of decompression in the other tank, the suction force of the ejector can be changed quickly, causing a time delay when changing the degree of decompression, that is, the vaporization temperature. Never.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of a reduced pressure evaporative cooling device of the present invention.

[Explanation of symbols]

1,2 Tank 5　Jacket part 8,9 Valve means 21 Reaction pot 22 Combination pump 28 Cooling water supply passage 30 Pump 32 Ejector

Claims (1)

[Claims] Claim 1: A combination pump that combines an ejector, a tank, and a pump, and an evaporative cooling chamber that communicates with the ejector.
In an evaporative cooling device comprising a cooling water supply passage for supplying cooling water to the tank, a plurality of tanks are arranged, a cooling water supply passage is connected to each tank, and a pressure reducing device is connected to a pump via a valve means. Evaporative cooling device.