JPH08112525A - Heater by steam or hot water - Google Patents

Abstract

PURPOSE: To obtain a heater by steam or hot water capable of heating a material to be heated not only by steam heating but hot water as well. CONSTITUTION: A heating flow supply pipe 2 is connected to a jacket part 4 of a reaction vessel 1. A steam pipe 9 is connected via valves 6, 8 to this heating flow supply pipe 2. A hot water pipe 11 is connected via a valve 10 thereto. This hot water pipe 11 communicates with a hot water heat exchanger 12. A branched steam pipe 15 is connected to the upper part of this hot water heat exchanger 12 and the lower part thereof is connected to an ejector part 20 of a combined pump 3 via a pipeline 34. The lower part of the jacket part 4 is also connected to the ejector 20 of the combined pump 3. The combined pump 3 is composed of the ejector 20, a tank 23, a circulating pump 24 and a circulating path 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device using steam or hot water for heat-treating an object to be heated while sucking the inside of a heat exchanger with a suction means such as a vacuum pump. In chemical, food, and medical product processes, there are many applications in which the object to be heated must be heated at a relatively low temperature of about 100 ° C in order to maintain product quality. Heating was performed using low-pressure steam with a large amount of heat.

[0002]

2. Description of the Related Art As an example of conventional low-temperature steam heating, there is one disclosed in Japanese Patent Publication No. 5-81298. This is one in which a steam supply pipe and a vacuum pump are connected to a heat exchanger, and a porous member is provided in contact with the outer wall of the heat exchanger or through a minute gap, and is supplied to the heat exchanger. The heated steam is blocked by the porous member and the supplied heat amount is suppressed, so that heat damage to the object to be heated can be prevented.

[0003]

In the case of the above-mentioned prior art, although the amount of supply steam is limited by the porous member, there is a problem that the supply steam becomes excessive and heats the object to be heated. . This is caused by fluctuations in the amount of the object to be heated and fluctuations in the pressure and temperature of the heated steam. That is, since the amount of heat held by the steam is relatively large, the object to be heated is likely to be damaged by heat.

Therefore, the technical problem of the present invention is that when an object to be heated is likely to be damaged by heat, it can be heated with warm water having a relatively small amount of heat, and there is no possibility of causing damage by heat and uneven heating occurs. When it is necessary to perform heat treatment without using steam, it is necessary to obtain a heating device using steam or hot water that can be heated by steam having a large amount of heat.

[0005]

[Means for Solving the Problems] The technical means of the present invention taken to solve the above problems is to connect a heating fluid supply pipe to the inlet side of a heat exchanger and to suction the outlet side of the heat exchanger. In which a heating fluid is heated by a heating fluid in a heat exchanger, a steam pipe and a hot water pipe are connected to the heating fluid supply pipe through valve means, and the hot water pipe is connected to the hot water heat exchanger. Is connected, a steam pipe is connected to the hot water heat exchanger, and the hot water heat exchanger is connected to a suction means for maintaining the inside of the hot water heat exchanger in a depressurized state.

[0006]

By connecting the steam pipe and the hot water pipe to the heating fluid supply pipe through the valve means, it is possible to operate the valve means to switch between the steam and the hot water when necessary, and supply the steam and the hot water.
In the case of hot water, heat damage to the object to be heated can be prevented, and in the case of steam, the object to be heated can be heated with a large amount of heat without uneven heating.

By connecting the hot water pipe to the hot water heat exchanger and connecting the steam pipe and the suction means to the hot water heat exchanger, steam is heat-exchanged in the hot water heat exchanger under reduced pressure and below atmospheric pressure. Hot water can be generated, and a large amount of hot water below 100 ° C. can be generated as needed. Therefore, the object to be heated can be heated with this relatively low temperature and a large amount of hot water.

[0008]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIG. 1). In the present embodiment, an example in which the reaction kettle 1 is used as a heat exchanger is shown, and the heating fluid supply pipe 2 connected to the inlet side of the reaction kettle 1 and the combination pump 3 as suction means connected to the outlet side are vaporized. Alternatively, a heating device using hot water is configured.

A jacket portion 4 is attached to the outer periphery of the reaction kettle 1 and a heating fluid supply port 5 is provided at the upper end thereof to connect the heating fluid supply pipe 2. The heating fluid supply pipe 2 is connected to a steam pipe 9 via valves 6 and 8 as valve means and a pressure adjusting valve 7, and is connected to a hot water pipe 11 via a valve 10. The hot water pipe 11 is further connected to a cold water pipe 14 via a hot water heat exchanger 12 and a valve 13. The steam pipe 9 is branched to the hot water heat exchanger 12 and the steam pipe 15 for heating cold water is connected to the hot water heat exchanger 12. The lower end portion of the steam pipe 9 is connected to the ejector 20 portion of the combination pump 3 described below via the valve 33 and the pipe line 34. Along with the connection, the steam trap 16 is also attached to the lower end. Further, a temperature sensor-18 for detecting the temperature of the fluid in the pipe is attached in the heating fluid supply pipe 2.

An ejector 20 of the combination pump 3 is connected to the lower portion of the jacket portion 4 via a pipe line 19. A steam trap 21 and a valve 22 are arranged in parallel between the conduit 19 and the ejector 20. The combination pump 3 is
Ejector 20, tank 23, circulation pump 24, and
It is constituted by a circulation path 25 which communicates with each other. Tank 2
The cooling water supply pipe 2 is provided on the upper side of the cooling water control valve 26 via the cooling water control valve
Connect 7 A branch passage 28 is provided from the circulation passage 25 to serve as a surplus fluid discharge passage in the tank 23. In this case, although not shown, it is preferable to install a liquid level gauge or a thermometer for detecting the liquid level and the fluid temperature in the tank 23.

The cooling water supply pipe 27 is branched and connected to one fluid supply port 29 of the jacket portion 4. Further, a part of the circulation passage 25 of the combination pump 3 is also branched and connected to the heating fluid supply port 5 of the jacket portion 4 via the pipe passage 30.

Next, the operation will be described. When heating the reaction kettle 1 with steam, the circulation pump 24 of the combination pump 3 is driven, and the valves 6 and 8 are opened to open the valves 10 and 3.
1, 32 are closed, and steam having a predetermined pressure, that is, temperature, is supplied from the pressure adjusting valve 7 to the jacket portion 4 via the heating fluid supply port 5. The supplied steam is deprived of heat by the object to be heated in the reaction kettle 1 and condensed to become drain. Drain is stee
Ejector 20 through mutrap 21 or valve 22
Is sucked. The sucked drain reaches the tank 23,
It is sucked by the circulation pump 24 and circulates in the circulation path 25. At the ejector 20 part, the pressure is lowered to the saturation pressure according to the temperature of the circulating fluid, and the drain generated in the jacket part 4 is sucked. The fluid temperature in the tank 23 can be set to a desired temperature by controlling the cooling water control valve 26 according to the detection value of a thermometer (not shown), and the suction force of the ejector 20 can be adjusted. .

When the amount of heat for heating the reaction kettle 1 with steam is too large and the object to be heated may be damaged by heat, the valve 8 is closed and the valves 10, 13 and 31 are opened. By heating the cold water from the cold water pipe 14 to a desired temperature and supplying the hot water from the heating fluid supply pipe 2 to the jacket portion 4, the reaction kettle 1 can be heated without causing heat damage. In this case, the inside of the hot water heat exchanger 12 is maintained in a reduced pressure state below atmospheric pressure by the ejector 20 of the combination pump 3, and the steam supplied from the valve 31 is below 100 degrees C in the hot water heat exchanger 12. It's temperature. Therefore, the cold water from the cold water pipe 14 is also supplied to the jacket portion 4 as hot water of 100 ° C. or less. The hot water that has heated the reaction kettle 1 is sucked into the ejector 20 through the valve 22.
The temperature of the hot water is detected by the temperature sensor-18 and the valve 13,
31 or the opening of the pressure adjusting valve 7 can be adjusted to be arbitrarily adjusted.

In the present embodiment, the circulating fluid can be supplied to the jacket portion 4 via the pipe 30 branched from the circulation passage 25 to heat or cool the reaction kettle 1 at a lower temperature. Also, from the cooling water supply pipe 27 to the fluid supply port 29
By supplying cooling water to the jacket part 4 through
The reaction kettle 1 can be cooled. In this case, the suction force of the combination pump 3 is increased to bring the interior of the jacket portion 4 into a vacuum state at atmospheric pressure or less, so that the reaction kettle 1 is heated by the vapor at the atmospheric pressure or less, that is, the temperature of 100 ° C. or less. You can also do it.

[0015]

As described above, according to the present invention, the steam pipe and the hot water pipe are connected to the heating fluid supply pipe, so that the object to be heated is not damaged by heating with hot water having a relatively small amount of heat. This can be prevented, and by heating with steam having a large amount of heat, the object to be heated can be heated in a short time without heating unevenness.

Further, according to the present invention, the hot water heat exchanger 10
A large amount of hot water of 100 ° C. or less can be generated by steam of 0 ° C. or less, and the object to be heated can be efficiently heated with hot water.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a heating device using steam or hot water according to the present invention.

[Explanation of symbols]

 1 Reactor 2 Heated Fluid Supply Pipe 3 Combination Pump 4 Jacket 7 Pressure Control Valve 9 Steam Pipe 11 Hot Water Pipe 12 Hot Water Heat Exchanger 14 Cold Water Pipe 20 Ejector 23 Tank 24 Circulation Pump

Claims (1)

[Claims] 1. A heating fluid supply pipe is connected to an inlet side of a heat exchanger, and a suction means is connected to an outlet side of the heat exchanger to heat an object to be heated by the heating fluid in the heat exchanger,
The steam pipe and the hot water pipe are connected to the heating fluid supply pipe through the valve means, the hot water pipe is connected to the hot water heat exchanger, the steam pipe is connected to the hot water heat exchanger, and the inside of the hot water heat exchanger is connected. A heating device using steam or hot water, characterized in that the heating device is connected to a suction means for maintaining a reduced pressure state.