JP2009144986A - Evaporative cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaporative cooling device capable of reducing the amount of cooling water. <P>SOLUTION: A cooling fluid supply pipe 5 and a steam supply pipe 8 are connected to a jacket portion 2 of a reaction vessel 1. A combination vacuum pump 4 is connected to a lower portion of the jacket portion 2 through an ejector 10. The combination vacuum pump 4 is composed of a three-way switch valve 29, a circulation pump 14, a cooling water tank 13 and a heat pump 3, and a circulation pump 24, a hot water tank 25 and the heat pump 3. In cooling the reaction vessel 1, the cooling fluid is supplied from the cooling fluid supply pipe 5 into the jacket portion 2, so that the cooling fluid vaporizes and draws heat from the reaction vessel 1, and the reaction vessel 1 can be evaporation-cooled. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vaporization cooling apparatus that cools an object to be cooled by the latent heat of vaporization of a cooling fluid in a vaporization cooling chamber.

  The evaporative cooling device connects the heat exchange fluid supply pipe and suction means to the heat exchange chamber, attaches a liquid collection plate to the lower part of the cooling fluid supply pipe, and compresses compressed air by blowing compressed air to the cooling fluid supply pipe and the liquid collection plate Connected air supply pipe, condensing steam on the outer periphery of the cooling fluid supply pipe to make a cooling fluid, collect this cooling fluid on a liquid collecting plate, and supply it to the whole object to be cooled uniformly with compressed air By doing so, the whole object to be cooled can be cooled without unevenness.

In this evaporative cooling device, there is a problem that a large amount of cooling water as a cooling fluid is required to evaporate and cool an object to be cooled.
Japanese Patent No. 3170669

  The problem to be solved is to provide an evaporative cooling device capable of reducing the amount of cooling water as a required cooling fluid when evaporating and cooling an object to be cooled.

  The present invention forms a vaporization cooling chamber for cooling an object to be cooled, supplies a cooling fluid to the vaporization cooling chamber, and vaporizes and cools the object to be cooled by connecting the vaporization cooling chamber to suction means. A heat pump for cooling the cooling fluid to a predetermined temperature is connected.

  The evaporative cooling device of the present invention is connected to a heat pump that cools the cooling fluid to a predetermined temperature, so that a small amount of cooling fluid can be cooled to a predetermined temperature with the heat pump and used repeatedly. The amount can be reduced.

  The present invention is provided with a heat pump that cools the cooling fluid to a predetermined temperature, and the heat pump is conventionally well-known that includes a compressor, a condenser, an expansion valve, an evaporator, and a pipe line connecting them. Can be used.

  In the present embodiment, an example in which the jacket portion 2 of the reaction kettle 1 is used as a vaporization cooling chamber is shown. The object to be cooled (not shown) placed inside the reaction kettle 1 is heat-exchanged by a cooling fluid as a cooling source supplied to the jacket portion 2.

  A jacket part 2 is formed over almost the entire circumference of the reaction kettle 1, and a combined vacuum pump 4 as a suction means is provided in the jacket part 2 and in this embodiment steam as a heating fluid so that it can be heated as well as cooled. The supply pipe 8 and the cooling fluid supply pipe 5 are connected.

  The lower part of the cooling fluid supply pipe 5 is connected to a part of the circulation path 15 of the combination vacuum pump 4 and the upper part is connected to the jacket part 2.

  A steam supply pipe 8 with a flow rate adjusting valve 7 interposed is connected to the upper right portion of the jacket part 2. By supplying steam for heating at a predetermined pressure, that is, temperature, from the steam supply pipe 8 to the jacket portion 2, the object to be heated in the reaction kettle 1 can be heated.

  A bypass pipe 11 is provided in parallel with the steam supply pipe 8 and a steam ejector 12 is attached. One end of a flash steam pipe 9 to be described later is connected to the suction port of the steam ejector 12.

  The discharge pipes 20 and 21 are connected below the jacket portion 2 and connected to the ejector 10 of the combination vacuum pump 4. A steam trap 22 is attached to the discharge pipe 20, and a control valve 23 is attached to the discharge pipe 21.

  The combination vacuum pump 4 is formed by sequentially connecting the ejector 10, the circulation pump 14, the cold water tank 13, and the heat pump 3 through the circulation path 15, and the circulation pump 24, the hot water tank 25, and the heat pump 3 are communicated through the circulation path 26. To form. A cooling unit 27 of the heat pump 3 is disposed at the bottom of the cold water tank 13. A heating unit 28 of the heat pump 3 is disposed at the bottom of the hot water tank 25.

A three-way switching valve 29 is connected to the connection between the circulation paths 15 and 26. The upper valve of the three-way switching valve 29 is connected to the ejector 10. A flash steam pipe 9 is connected to the upper part of the hot water tank 25, and a flash steam discharge pipe 30 for discharging excess flash steam is connected. A check valve 6 that allows only flash steam to pass from the hot water tank 25 to the steam ejector 12 is attached to the flash steam pipe 9.

The upper part of the ejector 10 and the cold water tank 13 is connected by a pipe line 31, and the upper part of the ejector 10 and the hot water tank 25 is connected by a pipe line 32.

  When the object to be cooled in the reaction kettle 1 is cooled, the three-way switching valve 29 is switched so that only the circulation path 15 and the ejector 10 communicate with each other, and the circulation path 26 and the ejector 10 are shut off. The circulation pump 14 is driven to supply the cooling water in the cold water tank 13 from the ejector 10 and the cooling fluid supply pipe 5 to the jacket portion 2. A part of the cold water circulates through the pipe line 31 to the cold water tank 13.

The cold water in the cold water tank 13 is cooled to a predetermined temperature by the cooling unit 27 of the heat pump 3, and when the cold water passes through the ejector 10, a predetermined suction force is generated in the ejector 10, and the discharge pipe 20 Alternatively, by setting the inside of the jacket portion 2 to a predetermined pressure state, for example, a vacuum state equal to or lower than the atmospheric pressure via 21, the cooling water injected into the jacket portion 2 is heated by the object to be cooled in the reaction vessel 1. By evaporating and evaporating, the object to be cooled can be vaporized and cooled by the latent heat of vaporization.

  The vaporized vapor of the cooling fluid that has cooled the object to be cooled by the jacket portion 2 and a part of the cooling water that could not be vaporized are sucked into the ejector 10 through the discharge pipe 20 or 21 and reach the cold water tank 13.

  Since the suction force that can be generated in the ejector 10 is determined by the temperature of the fluid flowing down the ejector 10, the temperature of the cooling water flowing down the ejector 10 is adjusted by appropriately adjusting the temperature of the cooling unit 27 of the heat pump 3. Thus, the suction force of the ejector 10 can be controlled.

  On the other hand, when the object to be heated in the reaction kettle 1 is heated, the steam is heated to the object to be heated in the reaction kettle 1 by supplying steam at a temperature suitable for heating from the steam supply pipe 8 to the jacket portion 2. Give and heat. In this case, the three-way switching valve 29 of the combination vacuum pump 4 is switched so that only the circulation path 26 and the ejector 10 communicate with each other, the circulation path 15 and the ejector 10 are blocked, and between the ejector 10 and the cooling fluid supply pipe 5. The valve 33 is also closed. Therefore, by driving the circulation pump 24, the hot water in the hot water tank 25 circulates through the three-way switching valve 29, the ejector 10 and the pipe line 32.

  Condensate condensed with steam in the jacket portion 2 and a part of the steam are sucked into the ejector 10 through the discharge pipes 20 and 21 and reach the hot water tank 25.

The hot water in the hot water tank 25 is heated up to a predetermined temperature by the heating unit 28 of the heat pump 3, re-evaporates in the tank 25 to become flash steam, and is sucked into the steam ejector 12 from the flash steam pipe 9 to supply steam. It is mixed with the steam from the pipe 8 and supplied to the jacket part 2.

The block diagram which shows the Example of the vaporization cooling device of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reaction kettle 2 Jacket part 3 Heat pump 4 Combination vacuum pump 5 Cooling fluid supply pipe 6 Check valve 8 Steam supply pipe 9 Flash steam pipe 10 Ejector 12 Steam ejector 13 Cold water tank 14 Circulation pump 15 Circulation path 20 Exhaust pipe 21 Exhaust pipe 24 Circulation pump 25 Hot water tank 26 Circulation path 27 Cooling part 28 Heating part 29 Three-way selector valve

Claims (1)

A vaporization cooling chamber for cooling an object to be cooled is formed, and a cooling fluid is supplied to the vaporization cooling chamber, and the vaporization cooling chamber is connected to a suction unit to evaporate and cool the object to be cooled. An evaporative cooling device, wherein a heat pump for cooling to a temperature is connected.

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