JP2012021724A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat exchanger that secures a sufficient amount of heat to be exchanged per unit time.SOLUTION: A cooling fluid supply pipe 23 and a steam supply pipe 3 are connected to the jacket part 11 of a reaction furnace 1. A sub-heat exchanger 27 is fixed to the outside of the jacket part 11. The upper and lower portions of the sub-heat exchanger 27 are connected inside the reaction furnace 1 across a circulation pump 28. A steam pressure control valve 7 and a gas-liquid separator 4 are fixed to the steam supply pipe 3. A steam trap 25 is connected to the lower portion of the gas-liquid separator 4. A fluid supply pipe 6 is connected between the steam pressure control valve 7 and the gas-liquid separator 4. A fluid ejector 20 is interposed in the fluid supply pipe 6. The suction chamber 22 of the fluid ejector 20 is connected to the outlet of the steam trap 25. In the jacket part 11, the reaction furnace 1 is heat exchanged, and at the outside of the jacket part 11, the sub-heat exchanger 27 is heat exchanged.

Description

The present invention relates to a heat exchange apparatus that indirectly heat-exchanges a heat exchange object in a heat exchanger and cools the heat exchange object.

A conventional heat exchange device has a heat exchange chamber connected to an ejector, connected to the circulation pump through the tank to the ejector, and provided with a tank temperature control unit by supplying cooling water to the tank. Thus, vibrations and impacts associated with the hammer phenomenon caused by the rapid condensation of steam can be prevented.

  The conventional heat exchange apparatus has a problem that the heat exchange efficiency cannot be improved to a certain degree because a sufficient amount of heat exchange per unit time cannot be ensured during cooling.

Japanese Patent Publication No. 5-34054

  The problem to be solved is to improve the heat exchange efficiency by ensuring a sufficient amount of heat exchange per unit time.

  The present invention includes a heat exchanger that cools a heat exchange object, a cooling fluid supply pipe that supplies a cooling fluid to the heat exchange member of the heat exchanger, and a suction unit that sucks the fluid in the heat exchange member. In the connected one, heat exchangers are arranged on both the inside and the outside of the heat exchange member.

  The present invention can increase the area for heat exchange by arranging heat exchangers on both the inside and outside of the heat exchange member, sufficiently securing the amount of heat exchange per unit time, Heat exchange efficiency can be improved.

The block diagram which shows the Example of the heat exchange apparatus which concerns on this invention.

In the present invention, the heat exchanger is arranged on both the inside and the outside of the heat exchange member. For example, when the heat exchanger is a reaction kettle, the heat exchange member is a jacket portion, while the jacket portion is A secondary heat exchanger can be attached to the outside.

In FIG. 1, a reaction kettle 1 as a heat exchanger, a jacket part 11 as a heat exchange member disposed on the outer periphery of the reaction kettle 1, suction means 2 connected to the lower end of the jacket part 11, and a jacket part 11 The auxiliary heat exchanger 27 arranged outside forms a heat exchange device.

 The steam supply pipe 3 is connected to a steam source such as a boiler (not shown), a steam pressure control valve 7 and an on-off valve 8 are attached, a fluid supply pipe 6 is connected, and a gas-liquid separator 4 is further attached to the heat exchanger. It connects with the jacket part 11 of the reaction kettle 1 as follows.

  A cooling fluid supply pipe 23 is connected to the upper right portion of the jacket portion 11. By supplying a cooling fluid from the cooling fluid supply pipe 23 to the jacket portion 11, the reaction kettle 1 and the auxiliary heat exchanger 27 can be cooled instead of being heated.

  The auxiliary heat exchanger 27 disposed outside the jacket part 11 is formed by spirally winding a semicircular pipe around the jacket part 11. A circulation pump 28 is disposed below the reaction kettle 1 and connected to the inside of the reaction kettle 1. A discharge pipe 29 of the circulation pump 28 communicates with a lower end portion of the auxiliary heat exchanger 27, and an upper end portion of the auxiliary heat exchanger 27. Is connected to the inside of the reaction kettle 1 from the upper part of the reaction kettle 1 by a pipe line 30.

  By driving the circulation pump 28, the heat exchange material in the reaction vessel 1 is circulated again from the reaction vessel 1 through the auxiliary heat exchanger 27 into the reaction vessel 1 by the circulation pump 28. is there. In the present embodiment, the reaction vessel 1 as a heat exchanger is disposed inside the jacket portion 11 as a heat exchange member, and the auxiliary heat exchanger 27 is disposed outside the jacket portion 11. The heat exchanged material is subjected to heat exchange, the area for heat exchange can be increased, a sufficient amount of heat exchange per unit time can be secured, and the heat exchange efficiency can be improved.

The lower end of the jacket portion 11 of the reaction kettle 1 is connected to the ejector 14 of the suction means 2 through a steam trap 12 and a valve 13. The suction means 2 is configured as a combination pump connected to the ejector 14, the tank 5, and the circulation pump 15 via the circulation path 16. The ejector 14 causes the fluid in the tank 5 to circulate and pass through the circulation pump 15, thereby generating a suction force according to the fluid temperature.

The circulation path 16 is branched to connect the surplus fluid discharge pipe 9 and the fluid supply pipe 6. An open / close valve 10 is attached to the surplus fluid discharge pipe 9 to maintain the liquid level in the tank 5 at a predetermined level in conjunction with a level meter in the tank 5 (not shown).

The fluid supply pipe 6 supplies a part of the circulating fluid of the combination pump 2 from the upper part of the steam supply pipe 3 in the direction of the arrow, and a liquid ejector 20, a strainer 18, and a valve means 19 are attached on the way. The suction chamber 22 of the liquid ejector 20 is connected to the outlet side of the vapor trap 25 via a pipe line 24.

The strainer 18 attached to the fluid supply pipe 6 is generally called a Y-type strainer, and has a screen member made up of a cylindrical stencil plate and a screen mesh inside. By flowing down, foreign matter such as rust and scale mixed in the fluid can be removed, and only the fluid from which the foreign matter has been removed can flow down to the valve means 19 side.

An automatic opening / closing valve 26 is connected to the blow passage 17 of the strainer 18. The blow passage 17 communicates with the inlet side of the strainer 18, and foreign matter that has been scraped off by the screen member and attached to the inner wall of the screen member can be removed from the blow passage 17 to the outside. Therefore, by opening the automatic opening / closing valve 26, the fluid flowing into the strainer 18 blows foreign matter adhering to the screen member and is removed from the system from the blow passage 17 and the automatic opening / closing valve 26.

 The gas-liquid separator 4 is disposed between the fluid supply pipe 6 and the jacket portion 11 of the reaction kettle 1. The gas-liquid separator 4 may be of a conventionally used type, and can be appropriately used such as one using centrifugal force, one that collides against a collision plate, one that uses a filter, or the like. A vapor trap 25 is attached to the lower part of the gas-liquid separator 4 and communicates with the liquid ejector 20 via a conduit 24. The steam trap 25 is a kind of automatic valve that allows only steam to flow down without passing steam, and discharges the steam as a liquid separated by the gas-liquid separator 4 to the outlet side. It is. A cooling fluid supply pipe 21 is connected to the upper part of the tank 5 of the suction means 2.

 When heating an object (not shown) in the reaction kettle 1, heating steam is supplied from the steam supply pipe 3 to the jacket portion 11, and the circulation pump 15 is driven to generate a suction force by the ejector 14.

In this case, the steam for heating is depressurized to a predetermined pressure by the steam pressure control valve 7, but even if the pressure is depressurized, the amount of heat possessed hardly decreases, so that the depressurized steam is superheated steam. Become. However, by supplying a part of the circulating fluid from the fluid supply pipe 6 into the superheated steam, the temperature of the superheated steam is reduced to the saturation temperature steam before flowing down the gas-liquid separator 4. The amount of fluid supplied from the fluid supply pipe 6 can be controlled by appropriately adjusting the opening degree of the valve means 19.

 In the gas-liquid separator 4, the mixed fluid of the circulating fluid and the steam is separated into gas and liquid, and the steam having reached the saturation temperature is supplied to the jacket portion 11 to heat the object to be heated in the reaction vessel 1 and separated. Liquid or condensate is drawn through the vapor trap 25 into the liquid ejector 20.

DESCRIPTION OF SYMBOLS 1 Reaction kettle 2 Suction means 3 Vapor supply pipe 4 Gas-liquid separator 5 Tank 6 Fluid supply pipe 11 Jacket part 14 Ejector 15 Circulation pump 17 Blow passage 18 Strainer 19 Valve means 20 Liquid ejector 23 Cooling fluid supply pipe 27 Sub heat exchanger 28 Circulation pump

Claims (1)

  In a heat exchanger that cools a heat exchange object, a cooling fluid supply pipe that supplies a cooling fluid to the heat exchange member of the heat exchanger, and a suction unit that sucks the fluid in the heat exchange member A heat exchange device in which heat exchangers are arranged both inside and outside the heat exchange member.

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