JPH07328422A - Heater by steam - Google Patents

Abstract

PURPOSE:To obtain a heater by steam by which a material to be heated is heated by steam without time lag and with good temp. accuracy. CONSTITUTION:A steam feeding pipe 17 for feeding steam is connected to a jacket part 16 of a reaction kettle 15. A line branches off from the steam feeding pipe 17 and is connected to a high pressure operation fluid introducing port 38 of a condensate recovery device 20. A replacement fluid feeding pipe 18 is connected to the lower part of the jacket part 16, and also is connected to an inflow port 34 of the condensate recovery device 20 through a line 19. A returning port 35 of the condensate recovery device 20 is connected to a condensate forcibly feeding line 29 through a check valve 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to heating an object to be heated in a heat exchanger with steam, and particularly, the heating temperature thereof is 100.
The present invention relates to a steam heating device suitable for a relatively low temperature of about C. Specifically, it is used for steam heating of various reaction kettles used for polymerization reaction, food distilling devices, concentrating devices, sterilizing devices, and the like. The object to be heated in these cases is
In most cases, a slight temperature rise causes thermal damage, and it is necessary to maintain the heating temperature with high accuracy.

[0002]

2. Description of the Related Art For example, a conventional steam heating device as shown in FIG. 3 has been used. This is for heating the reaction kettle 1 as a heat exchanger. The jacket 2 as a heating part is formed on the outer periphery of the reaction kettle 1 to connect the steam supply pipe 3 for heating, and is generated by heating. A condensate recovery device 4 for discharging condensate is connected to the steam supply pipe 3 to supply steam having a relatively low pressure, that is, a low temperature, to the jacket portion 2 to heat an object to be heated in the reaction vessel 1. To do. The steam supplied into the jacket portion 2 is condensed by heating to maintain the inside of the jacket portion 2 at a low pressure below atmospheric pressure.
It can be heated at a relatively low temperature of 0 ° C. or less.

The condensate water recovery device 4 is, for example, the actual development of Shokai 50-14.
No. 7228, a water level (not shown) is provided in a casing 9 having a condensate inlet port 5 and a reducing port 6 and a high pressure operating fluid inlet port 7 and a circulation port 8. A float that floats and descends together is arranged, and an air supply valve that opens and closes the inlet 7 for the high-pressure operating fluid and an exhaust valve that opens and closes the circulation port 8 for the high-pressure operating fluid are connected to the float, and the condensate flow When the inside of the casing 9 has a low water level, the condensate inlet 5 and the high-pressure operating fluid circulation port 8 are opened by the cooperation of the inlet 5 and the check valves 10 and 11 arranged at the return port 6. Introduced condensate,
When the inside of the casing 9 reaches a high water level, the condensate return port 6 and the high-pressure operating fluid inlet 7 are opened to introduce the high-pressure operating fluid into the casing 9 to pump the condensate to a predetermined recovery destination 12. It is a thing.

[0004]

The conventional steam heating device described above has a problem that the heating temperature cannot be accurately maintained, and in particular, the temperature cannot be accurately adjusted in the initial stage of heating. This is because in the initial stage of heating, a large amount of air remains in the jacket portion 2 and it is in an almost atmospheric pressure state, and the supplied heating vapor is difficult to condense and the inside of the jacket portion 2 is in a predetermined low pressure state. No 10
This is because the steam temperature cannot be adjusted to 0 ° C or lower.

Although the remaining air can be expelled by the supplied steam, it takes time to expel it and a time delay occurs, so that the temperature cannot be accurately adjusted.

Therefore, a technical object of the present invention is to obtain a steam heating apparatus capable of accurately adjusting the heating temperature without causing a time delay.

[0007]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems is to form a heating portion in a heat exchanger to connect a steam supply pipe for heating,
A condensate recovery device for discharging condensate generated by heating is connected, and a replacement fluid supply pipe for supplying a fluid for replacing air in the heating part of the heat exchanger is connected.

[0008]

The operation of the above technical means is as follows.
By connecting the replacement fluid supply pipe to the heat exchanger and replacing the air remaining in the heating section with the supplied fluid,
Air can be quickly eliminated. The fluid that has been replaced with air and filled up flows down into the condensate water recovery device and is pressure-fed to a predetermined recovery destination. By supplying the heating steam having a predetermined temperature into the heating section where the air is removed and the fluid is or is being pumped, the steam having the predetermined pressure or temperature is applied even if the temperature is 100 ° C. or less. The heating object can be heated.

[0009]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIGS. 1 and 2). Also in the present embodiment, an example in which the reaction kettle 15 is used as the heat exchanger will be described as in the conventional example. A jacket 16 is formed on the outer periphery of the reaction vessel 15 to connect the steam supply pipe 17 and the replacement fluid supply pipe 18, and the lower part of the jacket 16 and the condensate recovery device 20 are connected via a pipe line 19. Configure a steam heating device.

The steam supply pipe 17 is connected to the jacket portion 16 via the pressure control valve 21 and the opening / closing valve 22, and is also connected to the high pressure operating fluid inlet port 38 of the condensate recovery device 20 via the pipe line 23. The replacement fluid supply pipe 18 is connected to a fluid source such as water (not shown) and is also connected to the lower portion of the jacket portion 16 via the valve 24. The upper portion of the jacket portion 16 has a jacket portion 1 so that the air inside can be easily replaced.
A check valve 25, which allows air to flow down only to the outside of 6, is attached. However, the check valve 25 is not always necessary when the air can be made to flow outside through the steam supply pipe 17 or the like.

The lower part of the jacket portion 16 and the condensate recovery device 2
The condensate water inlet 34 of 0 is connected to the valve 26 via the valve 19 and the check valve 27. The check valve 27 allows passage of the fluid from the jacket portion 16 only in the direction of the condensate recovery device 20, but does not permit passage of the fluid in the opposite direction. The check valve 28 is also provided at the condensate return port 35 of the condensate recovery device 20.
The condensate pressure feed line 29 is attached via. This check valve 2
The numeral 8 allows the fluid to pass only from the condensate recovery device 20 to the outside.

The details of the condensate recovery system 20 are shown in FIG. A lid 32 is attached to the main body 31 with a bolt (not shown) to form a condensate storage chamber 33 inside. A condensate inlet 34 communicating with the condensate reservoir chamber 33 is formed in the upper part of the main body 31, and a return port 35 for returning the condensate to a recovery destination is formed in the lower part. An inlet port 38 connected to the vapor pipe line 23 as a high-pressure operating fluid is formed in the lid 32, and a high-pressure operating fluid circulation port 39 (not shown) is formed on the inner side of the inlet port 38. The inlet port 38 communicates with the condensate reservoir chamber 33 via the air supply valve 50, and the circulation port 39
Communicates with the condensate reservoir chamber 33 via an exhaust valve 51 (not shown) arranged substantially parallel to the back side of the air supply valve 50. Air supply valve 5
0 and the exhaust valve 51 are connected to the slide rod 53, so that when the slide rod 53 is displaced upward, the air supply valve 50 is opened and the exhaust valve 51 is closed, and when the slide rod 53 is displaced downward. The intake valve 50 is closed and the exhaust valve 51 is opened. A plurality of slide rings 5 for supporting the vertical movement of the slide rod 53 are provided on both sides of the slide rod 53.
5 is provided.

In the condensate reservoir chamber 33, a closed float 56 that floats and descends with the water level is housed. A lever 57 is attached to the float 56, and the connecting member 58 and the valve rod 59 of the valve body 60 are pin-connected to the lever 57. Lever 57 has pin 6
Rotate around 1 as the float 56 floats and descends. Auxiliary lever 6 via pin 63 at the end of lever 57
4 in series. The other end of the auxiliary lever 64 is rotatably attached by a pin 65 attached to the lid 32. One end of the connecting member 58 is connected to the slide rod 53 by a pin 62, and the other end is connected to the auxiliary lever 64 by a pin 66.
A compressed coil spring 67 is arranged at the center of the connecting member 58.

The water or condensate in the jacket 16 is supplied to the conduit 19
And passes through the valve 26 and the check valve 27 and flows down into the condensate pool chamber 33. When the condensed water is accumulated in the condensed water chamber 33, the float 56 rises and the lever 57 rotates about the pin 61. In this case, the pin 66 is displaced downward to move the coil spring 6
7 is further compressed. When the pin 66 is further displaced downward and positioned slightly below the position of the pin 62, the compression force of the coil spring 67 acts on the pin 62 and pushes up the slide rod 53 at once. When the slide rod 53 is located above, the air supply valve 50 is opened, high-pressure steam flows into the condensate reservoir chamber 33 from the steam pipe 23 as a high-pressure operating fluid, and is parallel to the inner side of the air supply valve 50. The exhaust valve 51 provided in the valve is closed to prevent discharge of high-pressure steam, and
Condensate in 3 is pressure-fed to the condensate recovery destination through the return port 35, the check valve 28, and the pipe 29.

When the condensate is recovered and the water level in the condensate reservoir chamber 33 drops, the float 56 descends as shown in FIG.
The air supply valve 50 is closed and the exhaust valve 51 is opened to discharge the high pressure steam in the condensate reservoir chamber 33 to the outside. When the vapor pressure in the condensate sump chamber 33 decreases, the condensate flows down into the condensate sump chamber 33 again through the inflow port 34. In this case, since the valve body 60 is raised to close the passage, the condensed water is not discharged from the return port 35.

In FIG. 1, when heating an object to be heated in the reaction vessel 15, first the valve 24 is opened and the other valves are closed, and the fluid such as water is supplied from the substitution fluid supply pipe 18 into the jacket portion 16. To supply. When the water is supplied, the air remaining in the jacket portion 16 is discharged to the outside through the check valve 25. Valve 24 when air is removed
Is closed and the valve 26 is opened, so that the water in the jacket portion 16 naturally flows into the condensate recovery device 20. The pressure control valve 21 is introduced into the jacket portion 16 from which air is removed.
By supplying heating steam having a predetermined pressure or temperature via the reactor, the reaction vessel 15 is heated with the steam having a predetermined temperature. For example, when steam of 60 ° C. is supplied from the pressure control valve 21, the reaction kettle 15 is heated at 60 ° C.

The steam that has heated the reaction kettle 15 is condensed into condensed water, so that the inside of the jacket 16 is maintained at the initial pressure state. On the other hand, the condensed condensate flows down into the condensate recovery device 20 through the conduit 19 and is pressure-fed to the condensate recovery destination by repeating the above-described operation.

[0018]

As described above, according to the present invention, the replacement fluid supply pipe is connected to the heat exchanger to quickly remove the residual air in the heating section and supply the steam at the predetermined temperature.
The object to be heated can be heated with good temperature accuracy without time delay.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a steam heating device of the present invention.

FIG. 2 is a sectional view of a condensate recovery device used in the steam heating device of the present invention.

FIG. 3 is a configuration diagram showing a conventional example of a steam heating device.

[Explanation of symbols]

 15 Reactor 16 16 Jacket 17 Steam Supply Pipe 18 Displacement Fluid Supply Pipe 20 Condensate Recovery Device 21 Pressure Control Valve 25 Check Valve

Claims (1)

[Claims] 1. The heating of a heat exchanger in which a heating part is formed in the heat exchanger, a steam supply pipe for heating is connected, and a condensate recovery device for discharging condensate generated by heating is connected. A steam heating device characterized in that a replacement fluid supply pipe for supplying a fluid for replacing the air in the section is connected.