JP2010096391A - Reduced pressure steam heating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a reduced pressure steam heating apparatus capable of uniformly heating an entire heat exchanger. <P>SOLUTION: A steam supply pipe 3 is connected to a jacket part 11 of a reaction furnace 1. A steam pressure control valve 7 is attached to the steam supply pipe 3. A vacuum suction means 2 is communicated with a lower part of the jacket part 11. The vacuum suction means comprises an ejector 14, a tank 5, and a circulation pump 15. A steam discharge port 4 is formed on the right side of the jacket part 11, and a lower end of the jacket part 11 is connected to the ejector 14. When required steam cannot be supplied to the right side part of the jacket part 11, by opening an automatic opening and closing valve 6, flow of steam can be forcibly created inside the jacket part 11, and steam can be supplied uniformly to the entire inner side of the jacket part 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

 The present invention relates to an apparatus for heating an object to be heated in a heat exchanger with low-pressure steam, and more particularly to a reduced-pressure steam heating apparatus suitable when the heating steam temperature is a relatively low temperature of about 100 ° C.

 A conventional vacuum steam heating apparatus is connected to a heat exchanger, a steam supply pipe for supplying heating steam to the heat exchanger, and a suction means for sucking a fluid in the heat exchanger. A gas-liquid separator that separates gas and liquid is disposed between the means, and the suction efficiency can be maintained high.

In the conventional reduced pressure steam heating apparatus, the heat exchanger is constituted by a plurality of rotating disks 10 and 11, but the pressure of steam supplied from the steam supply pipe 2 is low or the amount of supplied steam is low. When the number of the rotating disks 10 and 11 is small, the supply steam does not spread over the entire rotating disks 10 and 11, and the entire rotating disks 10 and 11 cannot be uniformly heated.
JP 2005-37046 A

  The problem to be solved is to obtain a reduced-pressure steam heating device that can uniformly heat the entire heat exchanger so that the supply steam can be distributed evenly throughout the heat exchanger.

  In the present invention, a heat exchanger for storing a heat exchange object, a steam supply pipe for supplying heating steam to the heat exchanger, and a vacuum suction means for sucking a fluid in the heat exchanger are connected. The steam supplied from the steam supply pipe to the heat exchanger is formed so that the steam is supplied to the whole of the heat exchanger by forming a steam outlet at a place where it does not spread in the heat exchanger. is there.

  In the present invention, by forming a steam outlet at a place where the supply steam does not spread, a steam flow can be forcibly created from the steam supply section in the heat exchanger to the steam outlet. Steam can be supplied to the whole, and the whole heat exchanger can be heated uniformly.

  In the present invention, a steam discharge port is formed at a location where the steam does not reach in the heat exchanger, and this steam discharge port can be constituted by a valve or the like that can open and close the passage.

  In FIG. 1, a reduced pressure steam heating apparatus is constituted by a reaction kettle 1 as a heat exchanger, a suction means 2, a steam supply pipe 3 for heating, and a steam outlet 4.

 The steam supply pipe 3 is connected to a steam source such as a boiler (not shown), and a steam pressure control valve 7 is attached to be connected to the jacket portion 11 of the reaction kettle 1 as a heat exchanger.

 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 and the surplus fluid discharge pipe 9 is communicated. 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).

 A steam outlet 4 is formed on the right side of the jacket portion 11 of the reaction kettle 1. The steam outlet 4 is connected to an ejector 14 via an automatic opening / closing valve 6. A temperature sensor 8 is attached to the lower part of the jacket part 11 to detect the temperature inside the jacket part 11 and transmit the signal to the automatic opening / closing valve 6.

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.

The steam supplied to the jacket portion 11 heats the superheated material in the reaction kettle 1, and the condensed condensate of the steam is sucked into the ejector 14 through the steam trap 12 and reaches the tank 5.

 When the pressure of the steam supplied from the steam supply pipe 3 is low, or when the amount of supplied steam is small, the necessary steam cannot be supplied into the jacket portion 11 on the opposite side of the steam supply pipe 3, Although the temperature of the portion is lowered, this temperature drop is detected by the temperature sensor 8 and the automatic opening / closing valve 6 is opened, thereby reaching the ejector 14 from the steam supply pipe 3 through the steam discharge port 4. A flow of steam can be created, and the entire inside of the jacket portion 11 can be uniformly steam-heated.

The block diagram which shows the Example of the pressure reduction steam heating apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reaction kettle 2 Vacuum suction means 3 Steam supply pipe 4 Steam discharge port 5 Tank 6 Automatic opening / closing valve 8 Temperature sensor 11 Jacket part 14 Ejector 15 Circulation pump

Claims (1)

A steam supply pipe in which a heat exchanger for storing a heat exchange object, a steam supply pipe for supplying steam for heating to the heat exchanger, and a vacuum suction means for sucking a fluid in the heat exchanger are connected. The steam is supplied to the heat exchanger from the steam exchanger at a location where the steam does not spread, forming a steam outlet so that the steam is supplied to the entire heat exchanger. Steam heating device.

Images