JPH0515773A - Vacuum evaporation cooling apparatus - Google Patents

Abstract

PURPOSE:To rapidly alter evaporation cooling temp. without generating time delay when the evaporation cooling temp. is altered. CONSTITUTION:The ejector 32 of a combination pump 22 is connected to the jacket part 5 of a reaction vessel 21 and also connected to tanks 1, 2 through valves 51, 52. A cooling water supply passage 28 is allowed to communicate with the tanks 1, 2 and a cooling pipe 17 through which a cooling medium can flow downwardly is provided in the tank 2. The tanks 1, 2 are allowed to communicate with a pump 30 through valve means 8, 9 and a cooling water supply pipe 26 is branched from the cooling water supply passage 28 through a valve 63 to be connected to 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 in which a cooling chamber is depressurized to vaporize and cool an object to be cooled. Specifically, the present invention relates to a cooling device for a reaction kettle that performs various reactions, an evaporative cooling device for food, etc.

[0002]

2. Description of the Related Art As a conventional reactor cooling device, for example, there is one disclosed in Japanese Unexamined Patent Publication No. 1-315336.
This is a combination pump that combines an ejector, a tank, and a pump, a switching valve means that can supply a part of the discharge water of 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 inside of the ejector. And discharge water from a combination pump for cooling is supplied to the fluid chamber of the reaction vessel to evaporatively cool the reaction vessel. Since the suction force, that is, the degree of pressure reduction generated in the ejector becomes a saturation pressure with respect to the temperature of the fluid passing through the ejector, the degree of pressure reduction in the ejector is increased, and thus the degree of pressure reduction in the cooling chamber is increased to further promote the evaporative cooling. The temperature control unit can reduce the temperature of the fluid passing through the ejector.

[0003]

The above-mentioned conventional technique has a problem that a time delay occurs when the degree of pressure reduction is changed and the degree of evaporative cooling is changed. In the reaction kettle, it is necessary to accurately adjust the temperature in the course of the reaction, and if a time delay occurs, the reaction product may be deteriorated or damaged. The reason for this time delay is that the temperature of the fluid passing through the ejector cannot be changed rapidly. That is, in the above-mentioned conventional device, cooling water is supplied from the temperature control unit to the tank, and the temperature of the fluid passing through the ejector also drops only when the temperature of the fluid in the tank drops, so the temperature of the water in the tank is adjusted. Therefore, it takes time and causes a delay.

Therefore, a technical object of the present invention is to obtain a decompression evaporative cooling apparatus capable of changing the degree of evaporative cooling, that is, the cooling temperature without causing a time delay.

[0005]

The structure of the reduced pressure evaporative cooling apparatus of the present invention is as follows. In a vaporization cooling device comprising a combination pump combining an ejector, a tank and a pump, an evaporative cooling chamber communicating with the ejector, and a cooling water supply passage for supplying cooling water to the tank, a plurality of tanks are arranged, At least one of the plurality of tanks is provided with a cooling means, and the plurality of tanks and the pump are communicated with each other through valve means.

[0006]

By supplying the fluid in the tank to the ejector by the pump, the ejector section has a saturation pressure corresponding to the fluid temperature. By setting the fluid temperature to 100 degrees or less, it is possible to achieve a reduced pressure state below atmospheric pressure. When the ejector is brought into a depressurized state, the vaporized cooling chamber communicating with the ejector is also depressurized, and the cooling water is vaporized to vaporize and cool the object to be cooled. The vapor that has taken away the heat and vaporized and the remaining cooling water is sucked into the ejector and reaches one tank. The steam is liquefied by the cooling water in the tank and is supplied to the ejector by the 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. The cooling water is stored in the other tank by the cooling means at a temperature according to the desired degree of pressure reduction, so that the fluid of the required temperature is quickly supplied to the ejector portion, and the desired suction force, that is, the pressure reduction. Generate a degree.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment will be described in detail. In this embodiment, an example in which a reaction kettle is used as an evaporative cooling device is shown. The reaction kettle 21 having the jacket portion 5 as an evaporative cooling chamber, the combination pump 22, the tanks 1 and 2, and the cooling water supply passage 28 constitute a reduced pressure evaporative cooling device. The reaction kettle 21 forms a jacket portion 5 over substantially 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 an object to be cooled, and the jacket portion 5 is cooled. Water supply ports 15 and 16 and a fluid discharge port 7 are provided.

In the combination pump 22, the pump 30 is connected to the tanks 1 and 2 on the suction side and the discharge side is connected to the nozzle 33 of the ejector 32, and the diffuser 34 of the ejector 32 is connected to the tank 1 via the valves 51 and 52. , 2 connected to the upper space, and the ejector 32 and the fluid discharge port 7 of the reaction vessel 21 are connected via a valve 10 and a trap 12. The combination pump 22 is configured to supply the water in the tank 1 or 2 to the ejector 32 by the operation of the pump 30 to cause the ejector 32 to perform a suction action, and to return the water to the tank 1 or 2. A cooling pipe 17 as a cooling means is attached in the tank 2.
The coolant in the cooling pipe 17 is caused to flow down to cool the water in the tank 2.

The cooling water supply passage 28 is provided so as to supply cooling water into the tank 1 or 2 and control a part of the water temperature, and the valves 53, 5 are provided in the tank 1 or 2.
It is designed to be controlled by supplying cooling water through 5,56. Water level sensors 57 and 5 for detecting the water level and fluid temperature of the tank 1 or 2 respectively.
Attach 8, 59, 60 and temperature sensors 61, 62. The tanks 1 and 2 communicate with the pump 30 via the valve means 8 and 9.

The cooling water supply pipe 26 is attached to the jacket 5 from the cooling water supply passage 28 through the valve 63.

A part of the passage connecting the pump 30 and the ejector 32 is branched to install a surplus water discharge valve 25, and signals from the water level sensors 57, 58, 59 and 60 in the tanks 1 and 2 cause the tank 1 Keep the water level in 2 and 2 within the specified range. Although not shown, each valve and sensor may be connected to a control unit to enable centralized control.

When cooling an object to be cooled, that is, when evaporative cooling is performed in the jacket portion 5, cooling water is supplied from the cooling water supply passage 28 into the tank 1 through the valves 53 and 55, and also through the valve 63. Cooling water is also supplied to the jacket portion 5. In this case the valves 9, 52, 56 are closed and the valves 8, 10, 5 are closed.
Leave 1 open. The pump 30 causes the fluid in the tank 1 to reach the ejector 32 and generate a suction force. Due to the suction force of the ejector 32, the inside of the jacket portion 5 is also depressurized, and the cooling water is vaporized by the heat of the object to be cooled, and the object to be cooled is cooled.
The vaporized vapor passes through the valve 10 and is sucked by the ejector 32 to reach the tank 1.

In order to change the degree of cooling, the jacket portion 5
When changing the degree of pressure reduction in the tank 2, the cooling water cooled to the desired temperature by the cooling pipe 17 is stored in the tank 2 in advance, and the valves 8, 9, 51, 52 are operated to adjust the temperature of the tank 2 to the desired temperature. By supplying the fluid to the ejector 32, it can be changed rapidly.

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 are installed in each of the tanks 1 and 2. You can also

In this embodiment, since the valve 67 is provided by branching the passage from the pump 30 to the ejector 32, a part of the discharge water of the pump 30 is supplied from the cooling water supply port 16 to the jacket portion 5. It can also be cooled.

Further, in this embodiment, since the steam supply passage 68 for heating is provided via the valve 69, not only the reduced pressure evaporative cooling but also the reduced pressure steam heating or the positive pressure steam heating can be performed.

[0017]

The present invention has the following effects. By storing the cooling water at the temperature corresponding to the degree of pressure reduction required by the cooling means in the other tank, the suction force of the ejector can be changed quickly, and when changing the degree of pressure reduction, that is, the vaporization temperature. There is no time delay.

Further, the cooling means using the refrigerant makes it possible to store the cooling water much lower than the temperature of the normal cooling water in the tank, and to further reduce the time delay compared with the cooling by the cooling water alone. can do.

[Brief description of drawings]

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

[Explanation of symbols]

 1 and 2 tanks 5 jackets 8 and 9 valve means 17 cooling pipes 21 reaction kettle 22 combination pump 28 cooling water supply passage 30 pump 32 ejector

Claims (1)

Claim: What is claimed is: 1. An evaporative cooling system comprising a combination pump including an ejector, a tank, and a pump, an evaporative cooling chamber communicating with the ejector, and a cooling water supply passage for supplying cooling water to the tank. In the device, a plurality of tanks are arranged, at least one tank of the plurality of tanks is provided with a cooling means, and the plurality of tanks and a pump are communicated with each other through a valve means.