JPH0953802A - Heating/cooling device using heat medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wide-range heating/cooling device using a heat medium. SOLUTION: A boiler 1 for a heat medium is connected to a jacket part 6 of a reaction boiler 2 through a hot fluid pipe 11. A cold fluid pipe 5 is connected to the jacket part 6. The jacket part 6 is connected to an ejector 20 of a vacuum pump means 7 through a line 16. The vacuum pump means 7 comprises the ejector 20, a heat-exchange tank 21, a circulation pump 22, and a connection line 23 therebetween.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to heating or cooling a heat exchange object with a heat medium, and is used in various heating and cooling processes in the petrochemical industry, synthetic fiber industry, synthetic resin industry and the like. The present invention relates to a heating / cooling device using a heat medium.

[0002]

2. Description of the Related Art As an example of a conventional heating / cooling device, a device as disclosed in Japanese Patent Publication No. 5-34054 has been used. This heats or cools the reaction kettle so that steam for heating and water for cooling can be switched and supplied to the fluid chamber of the reaction kettle, and the fluid chamber can be connected to an ejector, a tank, and a circulation pump. It is connected to a vacuum pump means composed of, and is capable of heating the reaction kettle by the latent heat of steam and cooling the reaction kettle by the latent heat of vaporization of water.

[0003]

When the above-mentioned conventional heating / cooling device is used, the heating or cooling temperature has a limited value, so that only a limited object to be heated or object to be cooled can be heat-exchanged. There was a problem I couldn't do. This is because steam or cooling water obtained by evaporating water is used as the heating / cooling fluid, so that the steam temperature or the evaporation temperature becomes a predetermined limited value.

Therefore, a technical object of the present invention is to obtain a heating / cooling device capable of heating and cooling in a wide temperature range.

[0005]

The technical means of the present invention taken to solve the above-mentioned technical problem is to connect a heating fluid supply pipe and a cooling fluid supply pipe to the primary side of a heat exchanger, A heating medium, in which a heating / cooling fluid is used as a heat medium and the heat medium is vaporized by connecting a vacuum pump means to the secondary side of the exchanger to heat or cool the heat exchange object in the heat exchanger. A vapor generating unit is arranged and connected to the heating fluid supply pipe, and a liquid heat medium supply unit for supplying a liquid heat medium is connected to the cooling fluid supply pipe.

[0006]

[Operation] By heating the heat exchange object by the heat medium vapor and cooling the heat exchange object by the latent heat of vaporization of the liquid heat medium, compared with the heating and cooling by the latent heat of water vapor and the latent heat of vaporization of water. Therefore, heating or cooling to a higher temperature can be performed.

Various types of heat mediums are commercially available and used, but those having a lower pressure and a higher temperature are generally used as compared with ordinary steam obtained by boiling water. For example, in the case of water, the pressure is approximately 50 degrees C under a vacuum pressure of approximately 95 mm of mercury.
However, in the case of a certain heat medium, it becomes a high temperature steam of about 200 ° C. under the same pressure condition.

[0008]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIG. 1). In this embodiment, an example in which the reaction kettle 2 is used as the heat exchanger is shown. The heating medium boiler-1 as the heating medium vapor generating section and the jacket section 6 of the reaction vessel 2 are connected via the heating fluid supply pipe 11, and the cooling fluid supply tube 5 is connected to the jacket section 6 to form the jacket section. The lower part of 6 is connected to the vacuum pump means 7, and the vacuum pump means 7 is connected to the heat medium boiler 1 via the tank 3 and the circulation pump 4 to form a heating and cooling device by the heat medium.

A pressure regulating valve 8, a gas-liquid separator 9 and a pressure sensor 10 are attached to a heating fluid supply pipe 11 between the heating medium boiler 1 and the reaction vessel 2. The pressure adjusting valve 8 is for adjusting the heat medium vapor pressure in the heating fluid supply pipe 11 detected by the pressure sensor 10 to a predetermined value, and the gas-liquid separator 9 is the heat medium vapor in the heating fluid supply pipe 11. And the liquid are separated, only the separated heat medium vapor is supplied to the jacket portion 6 of the reaction kettle 2, and the liquid is discharged from the steam trap 12 provided in the lower portion thereof. The gas-liquid separator 9 may be of a collision type, a centrifugal type, a filter type, or the like.

The cooling fluid supply pipe 5 connected to the heat medium supply pipe 31 via the valve 18 is connected to the right side of the jacket portion 6. A liquid heat medium is supplied from the cooling fluid supply pipe 5 to the jacket portion 6.

A jacket portion 6 arranged on the outer periphery of the reaction kettle 2.
The lower connection port 13 is connected to the ejector 20 of the vacuum pump means 7 by a pipe line 16 in which a steam trap 14 and a bypass valve 15 are provided in parallel. Further, the outlet of the steam trap 12 of the gas-liquid separator 9 is also connected to the ejector 20 via the conduit 17.

The vacuum pump means 7 includes an ejector 20, a heat exchange tank 21, a circulation pump 22, and a connection conduit 23.
It consists of and. The ejector 20 is formed of a nozzle portion 25 and a diffuser portion 26. A cooling pipe 28 for cooling the heat medium 27 accumulated therein is attached to the heat exchange tank 21 via a control valve 29, and the heat medium 2 is provided in the lower portion.
A temperature sensor 30 for detecting the fluid temperature of 7 is attached, and although not shown, the temperature sensor 30 and the control valve 2
9 are connected via a temperature controller, and the heat medium 27
So that the temperature can be maintained at a predetermined value. A heat medium supply pipe line 31 for supplying a heat medium is connected to the upper part of the heat exchange tank 21 via a valve 19.

The vacuum pump means 7 circulates the heat medium 27 in the heat exchange tank 21 through the ejector 20 by means of the circulation pump 22 to generate suction force at the nozzle portion 25 of the ejector 20, so that the reaction vessel 2 The heat medium is sucked from the jacket portion 6 and the inside of the jacket portion 6 is maintained at a predetermined pressure state.

A part of the connecting pipe line 23 of the vacuum pump means 7 is branched to connect the pipe line 32, and a part of the circulating heat medium is supplied to the pipe line 3.
3 is supplied to the tank 3, and a pipe 35 is further connected so that a part of the circulating heat medium is supplied to the heating fluid supply pipe 1.
It is injected into the primary side of the gas-liquid separator 9 in 1. Even when the heat transfer medium whose pressure is adjusted by the pressure adjusting valve 8 by the pipe line 35 becomes superheated steam, a part of the circulating heat transfer medium is injected and heat is exchanged in the gas-liquid separation unit 9 to obtain the saturation temperature. It can be steam.

The pipe 32 is further branched and connected to the cooling fluid supply pipe 5 via the pipe 36 and the valve 37. A part of the liquid heat medium circulating in the vacuum homping means 7 can be supplied to the jacket portion 6 of the reaction vessel 2 from the pipe line 36 through the cooling fluid supply pipe 5. In the present embodiment, the conduit 36 and the heat medium supply conduit 31 form a liquid heat medium supply unit.

Next, the operation will be described. When heating the reaction kettle 2, the heat medium vapor generated in the heat medium boiler-1 is pressure-adjusted via the pressure regulating valve 8 and supplied to the jacket portion 6. The inside of the jacket portion 6 is in a predetermined low pressure state due to the suction force of the ejector 20 of the vacuum pump means 7, and the heat medium vapor supplied to the jacket portion 6 becomes a predetermined pressure, that is, the vapor temperature and reacts. The object to be heated in the kettle 2 is heated. The heat medium vapor that has been heated and deprived of heat condenses into a liquid, is sucked by the ejector 20 through the steam trap 14, and reaches the heat exchange tank 21.

The heat medium 27 in the heat exchange tank 21 is cooled to a predetermined temperature by the cooling pipe 28 and supplied to the ejector 20 by the circulation pump 22 to suck the heat medium in the jacket portion 6 again. Since the suction force generated in the ejector 20 is determined by the temperature of the heat medium passing through the ejector 20, the suction force of the ejector 20 can be adjusted by appropriately adjusting the liquid temperature of the heat medium 27 in the heat exchange tank 21. That is, the degree of pressure reduction can be controlled. By controlling the suction force of the ejector 20, the pressure state inside the jacket portion 6 can be controlled, and the pressure inside the jacket portion 6 can be changed from a negative pressure state below atmospheric pressure to a positive pressure state above atmospheric pressure. It can be controlled, and corresponding steam temperatures can be controlled as well.

When a heat medium called Dowsum is used as the heat medium, the steam temperature is about 210 ° C when the steam pressure is 0.3 kg in absolute pressure, and about 260 ° C when it is 1.1 km. The steam temperature can be controlled by controlling the steam pressure.

Next, when the reaction kettle 2 is cooled, the pressure adjusting valve 8 is closed to stop the supply of the heat medium vapor and the liquid heat medium is supplied from the cooling fluid supply pipe 5 to the jacket portion 6. . In this case, the liquid heat medium can be supplied from either the heat medium supply pipe 31 or the pipe 36 connected to the vacuum pump means 7.

The liquid heat medium supplied to the jacket portion 6 is maintained in a predetermined depressurized state by the vacuum pump means 7 inside the jacket portion 6, and the heat of the reaction kettle 2 is taken to evaporate immediately. The reaction kettle 2 is cooled by the latent heat of vaporization. The heat medium vapor evaporated by cooling the reaction kettle 2 and a part of the liquid heat medium which has not evaporated are steamed.
It is sucked by the ejector 25 through the trap 14 and the valve 15, reaches the heat exchange tank 21, and is again adjusted to a predetermined temperature.

In this embodiment, the reaction vessel 2 is used as the heat exchanger, but other heat exchangers such as synthetic fibers and synthetic resins, heat exchangers for food and medical products, etc. Can also be used as.

In this embodiment, the vacuum pump means 7 is composed of the ejector 20, the heat exchange tank 21 and the circulation pump 22. However, other vacuum pumps such as a water ring type, a rotary type or a reciprocating type vacuum pump. Can also be used.

[0023]

As described above, according to the present invention, by using the heating medium as the heating / cooling fluid, it is possible to heat or cool the heat exchange object in a wider temperature range.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a heating / cooling device using a heat medium according to the present invention.

[Explanation of symbols]

 1 Boiler for heat medium 2 Reaction kettle 6 Jacket 7 Vacuum pump means 8 Pressure adjusting valve 9 Gas-liquid separator 14 Steam trap 20 Ejector 21 Heat exchange tank 22 Circulation pump 27 Heat medium 31 Heat medium supply line 36 Pipe Road

Claims (1)

[Claims] 1. A heat exchange object in the heat exchanger, wherein a heating fluid supply pipe and a cooling fluid supply pipe are connected to the primary side of the heat exchanger, and vacuum pump means is connected to the secondary side of the heat exchanger. Which heats or cools the heating medium, the heating medium is a heating medium, and a heating medium vapor generating part for vaporizing the heating medium is arranged and connected to the heating fluid supply pipe, and a liquid is supplied to the cooling fluid supply pipe. A heating / cooling device using a heat medium, characterized in that a liquid heat medium supply unit for supplying a heat medium in the shape of a liquid is connected.