JP2006136848A - Heat exchange apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchange apparatus capable of forcibly circulating a part of steam through a heat exchanger without using a steam ejector. <P>SOLUTION: A steam supplying pipe 2 and a fluid discharging pipe 3 are connected to the heat exchanger 1. A control valve 7 is installed on the steam supplying pipe 2. The fluid discharging pipe 3 is connected to a gas-liquid separator 6. A circulating steam pipe 10 is connected to a steam blower 5. A suction unit 4 is connected to the lower part of the gas-liquid separator 6 while interposing a steam trap 15 between them. A part of the steam supplied to a jacket part 9 of the heat exchanger from the steam supplying pipe 2 is condensed and becomes a condensation. The mixed fluid of the condensation with a part of steam falls into the gas-liquid separator 6 through the fluid discharging pipe 3. Only the steam separated from the condensation in the gas-liquid separator 6 is circulated forcibly into the jacket part 9 through the circulating steam pipe 10 by the steam blower 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat exchange apparatus that heats an object to be heated in a heat exchanger using steam as a heat source.

  The heat exchange device connects the steam supply pipe and the fluid discharge pipe to the heat exchanger, and connects the ejector device to the fluid discharge pipe, so that a part of the condensate in which the steam is condensed by heat exchange in the heat exchanger. The remaining steam is sucked by the ejector device.

In this heat exchange device, when the steam consumption in the heat exchanger fluctuates, there is a problem that the pressure and temperature of the steam in the heat exchanger fluctuate greatly. In general, there is a predetermined relationship between the drive steam amount and the suction fluid amount of the ejector device, and a predetermined amount of drive steam is required to secure a certain amount of suction fluid. If the steam consumption of the heat exchanger falls below, the steam pressure and temperature in the heat exchanger will fluctuate greatly.
JP-A-2-213601

  The problem to be solved is to provide a heat exchange device that can circulate a part of steam to a heat exchanger without using an ejector device that causes fluctuations in steam pressure and temperature.

  The present invention connects a steam supply pipe and a fluid discharge pipe to a heat exchanger, performs heat exchange with the steam supplied from the steam supply pipe, and sucks condensate condensed by the heat exchange from the fluid discharge pipe. In what is sucked by the device, electric steam circulation means for circulating a part of the steam from the fluid discharge pipe to the heat exchanger is attached, and the steam supplied from the steam supply pipe to the heat exchanger is supplied to the entire heat exchange surface. The steam ejecting portion is disposed, and the steam ejecting portion is attached in a direction in which the ejected steam is ejected toward the heat exchange surface.

  In the heat exchange device of the present invention, by attaching the electric steam circulation means to the fluid discharge pipe, a part of the steam can be circulated into the heat exchanger by the electric steam circulation means.

  In the present invention, an electric steam circulation means is attached. As this electric steam circulation means, those conventionally used such as a steam blower and a steam compressor can be used.

  FIG. 1 is a configuration diagram of one embodiment of the present invention, which includes a heat exchanger 1, a steam supply pipe 2, a fluid discharge pipe 3, a suction device 4, an electric steam circulation means 5, and a steam ejection section 11. A heat exchange device is configured.

  The heat exchanger 1 includes a reaction kettle 8 and a jacket portion 9, and a control valve 7 for controlling the supply amount of steam is attached to the steam supply pipe 2 that supplies steam for heating to the jacket portion 9. . A steam ejection part 11 is provided at the end of the steam supply pipe 2 on the jacket part 9 side. The steam ejection part 11 of the present embodiment has a ring shape with a square cross section, and is disposed on the entire circumference of the upper part of the reaction vessel 8, and is steamed downward (in the direction indicated by the arrow 26) from the lower end part 25 to the outer circumference of the reaction vessel 8. The spray holes are evenly arranged over the entire circumference so as to be ejected.

  The fluid discharge pipe 3 is connected to the lower part of the jacket part 9 and the gas-liquid separator 6 is attached. The gas-liquid separator 6 has a tank shape in which the passage area of the fluid discharge pipe 3 is rapidly expanded, and condensate and steam flowing down the fluid discharge pipe 3 and re-evaporated steam in which a part of the condensate is re-evaporated. The gas-liquid can be separated from the mixed fluid. Connected to the upper part of the gas-liquid separator 6 is a circulating steam pipe 10 that guides the vapor separated into the steam blower 5 as electric steam circulating means.

  The fluid discharge pipe 3 is connected to the suction part of the steam blower 5 through the circulation steam pipe 10 and the gas-liquid separator 6. A control valve 13 is attached to the circulation steam pipe 10. By the rotation of the steam blower 5, steam from the circulation steam pipe 10 and a communication pipe 22 described later can be circulated and supplied to the steam supply pipe 2.

  A steam trap 15 having a function of discharging only condensate without discharging steam is connected to the lower part of the gas-liquid separator 6 in parallel with the on-off valve 14. The outlet of the steam trap 15 is connected to the suction device 4.

  The suction device 4 is configured by connecting an ejector 16, a tank 17, and a circulation pump 18 with a circulation path 19. A cooling water supply pipe 20 for supplying cooling water is connected to the upper portion of the tank 17, and a communication pipe 22 communicating with the circulation steam pipe 10 is connected. A control valve 23 is attached to the communication pipe 22. Further, a part of the circulation path 19 is branched and the surplus water discharge pipe 21 is connected.

  When the reaction kettle 8 is heated, steam of a predetermined pressure is supplied from the steam supply pipe 2 and the steam ejection part 11 into the jacket part 9. The steam that has been deprived of heat in the reaction vessel 8 by the jacket portion 9 condenses into condensate, and flows down from the fluid discharge pipe 3 to the gas-liquid separator 6 to separate the gas and liquid. Is sucked into the steam blower 5 from the circulation steam pipe 10 and supplied to the jacket portion 9 again, whereby the heating steam is forcibly circulated.

  Steam is ejected from the steam ejection portion 11 to the entire circumference of the reaction vessel 8 and obliquely downward, so that the condensate adhering to the outer surface of the reaction vessel 8 and flowing downward is blown off and removed, and the remaining condensate is removed. The flow speed can be increased, heat transfer between the steam and the outer surface of the reaction vessel 8 can be promoted, and the heat exchange efficiency can be increased.

  The suction device 4 generates suction force by the ejector 16 by circulating water in the tank 17 to the ejector 16 by the circulation pump 18. Condensate as a liquid separated by the gas-liquid separator 6 passes through the steam trap 15 and is sucked into the ejector 16 of the suction device 4 and reaches the tank 17. The re-evaporated steam evaporated again from the high-temperature condensate in the tank 17 is sucked into the steam blower 5 through the control valves 23 and 13 and the communication pipe 22.

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

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Steam supply pipe 3 Fluid discharge pipe 4 Suction apparatus 5 Steam blower 6 Gas-liquid separator 8 Reactor 9 Jacket part 10 Circulating steam pipe 11 Steam ejection part

Claims (1)

A steam supply pipe and a fluid discharge pipe are connected to the heat exchanger, heat is exchanged with the steam supplied from the steam supply pipe, and condensate condensed by the heat exchange is sucked from the fluid discharge pipe with a suction device. In the apparatus, an electric steam circulation means for circulating a part of the steam from the fluid discharge pipe to the heat exchanger is attached, and a steam jet part for supplying the steam supplied from the steam supply pipe to the heat exchanger over the entire heat exchange surface is provided. A heat exchanging apparatus characterized in that the steam ejecting portion is disposed in a direction in which the ejected steam is ejected toward the heat exchange surface.

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