JP2554956B2 - Steam heating and evaporative cooling equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heating / cooling device for heating and cooling, and more particularly to a steam heating / vaporization cooling device for performing the above heating at a relatively low temperature and reduced pressure evaporative cooling. . As a heating and cooling device for steam, there is a reaction vessel or the like used for a polymerization reaction in the production process of various synthetic resins and solvents such as acetone.

<Prior Art> As a conventional heating / cooling apparatus, there is a heating / cooling apparatus for a reaction kettle shown in FIG. In the figure, reference numeral 1 denotes a reaction vessel, which has a raw material inlet 2, a product outlet 3, a stirrer 4, and a jacket portion 5. The jacket 5 is provided with fluid supply / discharge ports 6 and 7 for heating and cooling, one of which is connected to a cooling water supply pipe 8 and a condensate discharge pipe 9, and the other is connected to a steam supply pipe 10 and Connect the cooling water discharge pipe 11 and insert valves V1, V2, V in the middle of each pipe.
3 and V4 are provided. When heating the raw material in the reaction kettle 1, the valves V2 and V4 are closed and the valves V1 and V3 are opened. As a result, steam is supplied from the pipe 10 and the fluid supply / discharge port 7 into the jacket portion 5 for heating, and then discharged through the condensate discharge pipe 9 and the steam trap 12.

For cooling, valves V1 and V3 are closed and valves V2 and V4 are opened. As a result, cooling water is supplied into the jacket portion 5 through the pipe 8 and the fluid supply / discharge port 6, and cooling is performed. The supplied cooling water is discharged through the fluid supply / discharge port 7 and the pipe 11.

<Problems to be Solved by the Invention> The conventional heating / cooling device described above has a problem that when the steam is directly supplied during heating, the amount of heat supplied is too large to damage the object to be heated, and during cooling, the reaction vessel is made uniform. There was a problem that it was difficult to keep the quality of the product constant due to the temperature unevenness because the temperature could not be cooled and a partial abnormal temperature rise occurred. In order to reduce the amount of heat supplied, hot water heating can be performed, but in the case of hot water, the heating temperature is usually limited to 100 ° C or lower, and equipment for producing hot water must be newly installed. Further, the cause of the temperature unevenness during cooling is that the cooling is performed by the cooling water, so that the cooling is performed only by the sensible heat of the water and the heat capacity is small.

Therefore, the technical problem of the present invention, in the heating and cooling device, while preventing the damage of the object to be heated by appropriately pressing the supply heat amount of the steam during heating, while increasing the heat capacity during cooling, uneven temperature of cooling. It is to maintain the quality of the product by eliminating it.

<Means for Solving the Problem> The technical means of the present invention taken to solve the above-mentioned problems is to form a heating and cooling fluid chamber in contact with a heated and cooled container, and to apply a valve to the fluid chamber when heating. A steam supply pipe for supplying steam through the device is connected, a cooling water supply pipe for supplying cooling water is connected through a valve device at the time of cooling, and a fluid chamber is connected to a vacuum pump. A gas-liquid separation functional polymer film is provided through a gap so as to cover the outer wall of the heated cooling container, the vapor supply pipe and the vacuum pump are connected to the outer peripheral side of the gas-liquid separation functional polymer film, and the inner peripheral side is connected. A cooling water supply pipe is connected and a through hole is provided at the lower end of the gas-liquid separation functional polymer membrane.

<Operation> When heating, open the steam supply pipe that supplies heated steam to the fluid chamber through the valve device. The vapor that reaches the fluid chamber comes into contact with the container to be heated via the gas-liquid separation function polymer film, and the gas-liquid separation function polymer film becomes the resistance of the steam currency, and the supplied heat amount is appropriately suppressed, The heated container is heated together with the vapor that has flowed in through the through hole provided at the lower end of the separation functional polymer membrane. The condensate drained by heating the heated container is dripped downward through the gap between the gas-liquid separating polymer film and the heated container, and penetrates through the bottom end of the gas-liquid separating polymer film. It reaches the fluid chamber through the hole and is removed from the system by the vacuum pump.

In the case of cooling, the steam supply pipe is closed, the valve device of the cooling water supply pipe is opened, the cooling water is supplied to the fluid chamber, and the pressure inside the fluid chamber is reduced by the vacuum pump. The cooling water reaches the gap between the container to be cooled and the polymer film for gas-liquid separation function, uniformly adheres to the entire outer circumference of the container to be cooled, and is rapidly vaporized due to the heat and reduced pressure of the object to be cooled. Evaporative cooling of the cooled product. The vaporized vapor passes through a part of the gas-liquid separation functional polymer membrane, reaches the fluid chamber, and is removed from the system by a vacuum pump.

<Example> An example showing a specific example of the above technical means will be described.
(See FIG. 1) In this embodiment, an example in which a reaction kettle is used as a heating / cooling device is shown.

In FIG. 1, 21 is a reaction vessel, 22 is a pump device, 23 is a valve device, 24 is a water temperature control unit, 25 is excess water discharge means, 26 is a valve device, 27 is a steam supply pipe, 28 is a cooling water supply pipe. Is.

The reaction vessel 21 includes a raw material inlet 2, a product outlet 3, a stirrer 4, and a jacket portion 5 as a fluid chamber for steam heating and evaporative cooling.
The jacket portion 5 is provided with a fluid discharge port 7. The steam supply pipe 27 and the cooling water supply pipe 28 are connected to the jacket portion 5 via valve devices 23 and 26, respectively. A gas-liquid separation functional polymer membrane 20 is provided in the jacket 5 so as to cover the outer periphery of the reaction vessel 21. A gap is provided between the gas-liquid separation functional polymer membrane 20 and the outer periphery of the reaction vessel 21. The steam supply pipe 27 is connected to the outer periphery of the gas-liquid separation functional polymer film 20 in the jacket portion 5, and the cooling water supply pipe 28 is connected to the inner periphery of the gas-liquid separation functional polymer film 20. A through hole 16 is provided around the product outlet 3 at the lower end of the gas-liquid separation functional polymer membrane 20.

In the pump device 22, the pump 30 has the suction side connected to the tank 31 and the discharge side connected to the nozzle 33 of the ejector 32,
The diffuser 34 of 32 is connected to the upper space of the tank 31, and the ejector 32 and the fluid discharge port 7 are connected to each other. The pump device 22 is configured to supply the water in the tank 31 to the ejector 32 by the operation of the pump 30 to cause the ejector 32 to suck the water, and to return the water to the tank 31.

The valve device 26 is attached to the cooling water supply passage 28, and the pump 30
This is an electrically operated valve that supplies or shuts off a part of the discharge water of the jacket 5 and is opened / closed by a signal from the controller 29.

The water temperature control unit 24 is provided to control the water temperature in the tank 31, and is controlled by supplying cooling water into the tank 31. An electric valve 70 is provided in the middle of the cooling water supply pipe 40 connected to the tank 31, and is opened / closed by a signal from a temperature sensor 41 that detects the water temperature in the tank.

The surplus water discharging means 25 includes a motorized valve 71 in a part of the pump device 22.
Is attached and the water level in the tank 31 is kept within a predetermined range by signals from the water level sensors 42a and 42b in the tank 31.

The motor-operated valves 70 and 71 other than the valve device 26 and the valve device 23 are also connected to the control unit 29 so that centralized control is possible.

When the reaction kettle 21 is heated, the valve device 23 is opened by the signal from the control unit 29 and steam is supplied to the jacket portion 5 to heat the reaction kettle 21 with steam. In this case, the supplied vapor limits the amount of contact with the reaction vessel 21 by the gas-liquid separation functional polymer membrane 20, and prevents the raw material as the article to be heated from being thermally damaged. The drain generated by heating is sucked by the ejector 32 and reaches the tank 31 through the through hole 16 at the lower end. When the water level in the tank 31 reaches the upper limit water level by the drain, the water level sensor 42a detects it, the electric valve 71 opens, and the surplus water is discharged to the outside of the system.

In the case of cooling, the valve device 23 is closed to stop the supply of steam, the valve device 26 is opened, and a part of the water discharged from the pump 30 is supplied to the jacket part 5. The supplied cooling water is uniformly attached to the entire outer wall of the reaction vessel 21 by the gas-liquid separation functional polymer film 20. The inside of the jacket portion 5 is also depressurized by the suction action, that is, the depressurizing action generated in the ejector 32. When the inside of the jacket 5 is decompressed, the cooling water that has uniformly adhered to the reaction vessel
The heat of 21 rapidly vaporizes and cools the raw material.

The degree of pressure reduction in the jacket portion 5 can be controlled by adjusting the water temperature of the tank 31.

<Effects of the Invention> According to the present invention, an appropriate amount of heat is not supplied during heating, and the object to be heated is not thermally damaged. In addition, even during cooling, uniform cooling water is supplied to the entire container to be cooled,
Since the cooling chamber is depressurized and vaporized to be cooled, it can be cooled uniformly and with a large heat capacity, and it is possible to prevent uneven cooling and maintain a constant product quality.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a schematic configuration of an embodiment of a steam heating and evaporative cooling device of the present invention, and FIG. 2 is a schematic configuration diagram showing an example of a conventional heating and cooling device. 5: Jacket part, 7: Fluid discharge port 16: Through hole, 20: Polymer membrane with gas-liquid separation function 21: Reactor, 22: Pump device 27: Steam supply pipe, 28: Cooling water supply pipe 31: Tank, 32 : Ejector

Claims (1)

(57) [Claims] 1. A heating and cooling fluid chamber is formed in contact with a heated cooling container, a steam supply pipe for supplying steam to the fluid chamber via a valve device at the time of heating is connected to the fluid chamber, and a valve device is connected at the time of cooling. A cooling water supply pipe for supplying cooling water and a fluid chamber connected to a vacuum pump, wherein a gas-liquid separation functional polymer film is provided in the fluid chamber through a gap so as to cover the outer wall of the heated cooling container. A vapor supply pipe and a vacuum pump are connected to the outer peripheral side of the gas-liquid separation functional polymer membrane, a cooling water supply pipe is connected to the inner peripheral side, and the lower end of the gas-liquid separation functional polymer membrane is penetrated. A steam heating and evaporative cooling device having holes.