JPH03101831A - Steam heating and vaporization cooling device - Google Patents

Abstract

PURPOSE:To lower temp. difference at a time of changeover of heating and cooling by communicating the suction port of a pump with the diffuser of an ejector via a tank and providing a controlling part for controlling water temp. in the tank. CONSTITUTION:In the case of changing over a jacket part 5 to cooling from heating, an outlet 35 of high-temp. steam and a feed port 6 of fluid are interrupted by a valve device 23a. The feed port 6 of fluid is communicated with an outlet 37 of low-temp. steam by a valve device 23b and also a valve 72 is opened. Thereby supply of high-temp. steam is stopped and one part of water discharged from a pump 30 becomes fine water droplets by a waterdroplet nozzle 28. The fine water droplets are sucked to low-temp. steam by a second ejector 27 and becomes mixed fluid and is supplied to the jacket part 5. The mixed fluid supplied to the jacket part 5 and the residual high-temp. steam are sucked by an ejector 32 and reach a tank 31. Thereby quick vaporization and cooling are performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heating and cooling device that performs heating and cooling using a single heat exchange member. Examples of the above-mentioned heating and cooling devices include various reaction vessels, food distillation devices, and sterilization devices.

<Prior Art> As a conventional heating/cooling device, there is a heating/cooling device for a reaction vessel shown in FIG. In the figure, 1 is a reaction vessel, which has a raw material population 2, a product outlet 3, a companion device 4, and a jacket portion 5. The jacket part 5 is provided with fluid supply and discharge ports 6 and 7 for heating and cooling, one of which is connected to a cooling water supply pipe 8 and a drain discharge pipe 9, and the other is connected to a steam supply pipe 1.
0 and the cooling water discharge pipe 11, and install a valve v1 in the middle of each pipe.
, ■2, V3, and v4 are provided. When heating the raw materials in this reaction vessel 1, close valves v2 and ■4, and close valves V'l and
Open V3. As a result, steam is transferred to the pipe 10 and the fluid supply/discharge port 7.
is supplied into the jacket portion 5 and heated.

Drain generated at that time is discharged through the fluid supply/discharge port 6 and the pipe 9. In the figure, 12 is a steam trap that discharges only the drain.

Also, when cooling, close valves V1 and v3, and close valves 2 and v4.
open. As a result, cooling water is supplied into the jacket portion 5 through the pipe 8 and the fluid supply/discharge port 6, thereby performing cooling.

The supplied cooling water is discharged through the fluid supply/discharge port 7 and the pipe 11.

<Problems to be Solved by the Invention> In the conventional heating/cooling device described above, a hammer phenomenon occurs when heating is performed after cooling or cooling is performed following heating, and the device is damaged by the vibration and impact. death,
There is a problem with short life.

When switching between heating and cooling, this raw prisoner is
There is a large temperature difference in the temperature of the newly supplied fluid with respect to the temperature of the parts of the pipes 8, 9, 10, and 11 that communicate with the inside thereof, and the temperature of the fluid remaining in each of these parts. It's for a reason.

Furthermore, during cooling, the reaction vessel cannot be cooled uniformly, and localized abnormal temperature rises tend to occur, and this temperature unevenness makes it difficult to maintain constant product quality. The reason for this is that since the cooling is performed by cooling water, the cooling is performed only by the obvious cooling water, and the heat capacity is small.

Therefore, the technical problem of the present invention is to
To make it possible to reduce the temperature difference when switching between heating and cooling, and to greatly increase the heat capacity during cooling.

Means for solving the above problems> The technical means of the present invention taken to solve the above problems are as follows:
A control unit is provided that communicates the diffuser of the ejector and the suction port of the pump through a tank, supplies cooling water into the tank, and controls the water temperature in the tank, and connects the discharge port of the pump to the nozzle of the ejector. A pump device is provided with a discharge means for discharging surplus water circulated by the pump to the outside of the system, and the ejector part of the pump device is connected to the steam heating and evaporation cooling chamber, so that the steam heating and evaporation cooling chamber is connected to the , a water droplet nozzle is provided in which a steam supply passage is provided via a valve device and a high-temperature steam outlet of a vortex tube that separates pressurized steam into high-temperature steam and low-temperature steam; a second ejector and a diffuser for sucking minute water droplets generated by the water droplet nozzle, the low temperature steam outlet of the swirl tube is connected to the nozzle of the second ejector, and the second diffuser is connected to the second ejector through a valve device. A evaporative cooling passage communicating with the steam heating and evaporative cooling chambers is provided.

Function> As is well known, the vortex tube allows compressed air to flow into the cylindrical vortex tube in a spiral flow, and this rotating air flow creates a pressure increase near the inner wall of the cylinder, causing the axis to Create a decompression area nearby. Then, the pressurized air becomes high temperature due to adiabatic compression, and the air in the low pressure region becomes low temperature due to adiabatic expansion, and flows out from both ends of the vortex tube.

The present invention uses steam as the fluid supplied to the vortex tube, and the pressurized steam supplied to the vortex tube flows out as high-temperature steam from the high-temperature steam outlet, and is heated and evaporatively cooled via a valve device. The steam flows into the chamber and heats the steam. That is,
A valve arrangement communicates the hot steam outlet of the swirl tube with the steam heating and vaporization cooling chamber. The high-temperature steam heats the object to be heated, becomes a drain, is sucked into the ejector, and reaches the inside of the tank, raising the water temperature inside the tank.

When switching from heating to cooling, a valve device connects the low-temperature steam outlet of the vortex tube to the steam heating and vaporization cooling chamber via the nozzle and diffuser of the second ejector, and also directs a portion of the water discharged from the pump to the water droplet nozzle. It communicates with the second evictor via. The water discharged into minute water droplets from the water droplet nozzle is sucked into low-temperature steam by the second ejector, mixed, and reaches the steam heating and vaporization cooling chamber. The residual high temperature steam in the steam heating and vaporization cooling chamber and the supplied discharge water are sucked into the ejector and returned to the tank. Therefore, since the discharged water supplied to the steam heating and vaporization cooling chambers is initially at a high temperature, the problematic temperature difference is small, and the residual steam does not rapidly condense and cause the hammer phenomenon. Cooling water is then supplied into the tank to gradually lower the temperature of the water circulating in the pump. When the water temperature drops, the steam heating and evaporative cooling chamber is depressurized by the suction action of the ejector, and as a result, the mixed fluid of discharged water and low-temperature steam supplied by the water droplet nozzle quickly evaporates and evaporatively cools the object to be cooled. .

Next, when switching from cooling to heating, first stop the supply of cooling water into the tank from the evaporative cooling state, then the pump discharge water circulates through the evaporative cooling chamber, the ejector, and the tank.
The temperature gradually rises due to heat from the object to be cooled and heat from circulation.

If the valve device stops the supply of water droplets and low-temperature steam and supplies high-temperature steam when the temperature rises to a certain degree, the temperature difference in question will be small and the steam will not condense rapidly, and the object to be heated will be heated by the steam.

<Example> An example showing a specific example of the above technical means will be described. (See Figures 1 to 3) In this example, a reaction vessel is used as the heating and cooling device.

In FIG. 1, 21 is a reaction vessel, 22 is a pump device, 2
3a and 23b are valve devices, 24 is a water temperature control unit, 25 is an excess water discharge means, 26 is a vortex tube, 27 is a second ejector, 28
is a water droplet nozzle.

The reaction vessel 21, like the conventional one, has a raw material population 2, a product outlet 3, an agitator 4, and a jacket part 5 as a steam heating and vaporization cooling chamber. A fluid supply port 6 and a fluid discharge port 7 are provided for use.

In the pump device 22, a pump 30 has a suction side connected to a tank 31 and a discharge side connected to a nozzle 33 of an ejector 32.
A diffuser 34 of the ejector 32 is connected to the upper space of the tank 31, and the ejector 32 and the fluid outlet 7 of the reaction vessel 21 are connected. This pump device 22 is configured to supply water in a tank 31 to an ejector 32 by operation of a pump 30, to cause the water to be suctioned, and to return the water to the tank 31.

The valve device 23a is a three-way valve that communicates or shuts off the high-temperature steam outlet 35 of the swirl tube 26 and the fluid supply port 6 of the reaction vessel 21, and when shut off, high-temperature steam is discharged from the discharge pipe 36 or supplied to separately used equipment. .

Similarly, the valve device 23b is connected to the low temperature steam outlet 37 of the swirl tube 26.
and the fluid supply port 6, the second nozzle 38 and the diffuser 3
It is a three-way valve that communicates or shuts off communication via 9. The valve devices 23a and 23b are opened and closed by signals from the control section 29.

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

The surplus water discharge means 25 includes an electric on-off valve 71 attached to a part of the pump device 22, and a water level sensor 42a in the tank 31.
, 42b to maintain the water level in the tank 31 within a predetermined range.

As shown in FIGS. 2 and 3 in enlarged cross-sectional views, the vortex tube 26 has a pressurized steam inlet 60 at one end, a low-temperature steam outlet 37 via a partition plate member 61, and a low-temperature steam outlet 37 at the other end. A high-temperature steam outlet 35 is formed at the top. Pressurized steam inlet 60
The steam flowing in is jetted in the tangential direction of the inner wall of the vortex tube 26 by a plurality of grooves 62 (see FIG. 3) provided in the partition plate member 61. Therefore, a vortex is generated in the vortex tube 26. The low-temperature steam flows out from the low-temperature steam outlet 37 and the high-temperature steam flows out from the high-temperature steam outlet 35.

The water droplet nozzle 28 turns water discharged from the pump 30 into minute water droplets, and is connected to the pump 30 via a valve 72. The outer periphery of the water drop nozzle 28 is covered with a closed tank 73, and the upper part of the closed tank 73 is communicated with the second ejector 27.

The valve 75 is for supplying or blocking pressurized steam from the pressurized steam pipe 80, and the valve 76 is for supplying or blocking compressed air from the compressed air pipe 81.

When heating the reaction vessel 21, the valve 75 is opened in response to a signal from the control unit 29, the valve device 23a communicates the high temperature steam outlet 35 and the fluid supply port 6, and the valve device 23b communicates the low temperature steam outlet 37 with the fluid supply port 6. The port 6 is shut off to discharge low-temperature steam to the outside of the system, and the other valves are closed. The pressurized steam from the pressurized steam pipe 80 reaches the vortex tube 26, becomes high-temperature steam, and is supplied to the jacket section 5 to heat the reaction vessel 21 with steam. Drain generated by heating is sucked into the ejector 32 and reaches the tank 31. When the water level in the tank 31 reaches the upper limit water level due to draining, the water level sensor 42a detects this, and the electric on-off valve 71 opens to discharge excess water to the outside of the system. tank 3
The water temperature inside 1 rises due to the inflow of drain.

When switching from heating to cooling, the high temperature steam outlet 35 and the fluid supply port 6 are shut off by the valve device 23a, and the valve device 23b is switched off.
As a result, the low temperature steam outlet 37 and the fluid supply port 6 are communicated with each other, and the valve 72 is also opened. As a result, the supply of high-temperature steam is stopped, and a portion of the water discharged from the pump 30 becomes minute water droplets in the water droplet nozzle 28, is sucked into low-temperature steam in the second ejector 27, becomes a mixed fluid, and is supplied to the jacket section 5. . The mixed fluid and residual high temperature steam supplied to the jacket part 5 are sucked by the ejector 32 and reach the drain tank 31. At the initial stage of switching from heating to cooling, the water discharged from the pump 30 is at a high temperature during heating, so the residual high temperature steam does not rapidly condense. Therefore, no hammer phenomenon occurs in this case. By supplying cooling water into the tank 31, the water temperature within the tank 31 gradually decreases. As the water temperature decreases, the suction action, ie, the degree of pressure reduction, generated in the ejector 32 increases, and the inside of the jacket portion 5 is also reduced in pressure.

When the inside of the jacket part 5 is depressurized, the supplied mixed fluid of water droplets and low-temperature steam is vaporized by the heat of the reaction vessel 21 and cooled. The mixed fluid is minute water droplets and is more easily evaporated, allowing uniform and rapid evaporative cooling.

The degree of reduced pressure within the jacket portion 5 can be adjusted by controlling the water temperature in the tank 31.

If it is desired to lower the cooling temperature further than by evaporative cooling using a mixed fluid of low-temperature steam and water droplets, compressed air can be supplied from the compressed air pipe 81 to the vortex tube 26 to perform cooling as a mixed fluid of low-temperature air and water droplets. .

When switching from cooling to heating, the electric on-off valve 70 of the cooling water supply pipe 40 is closed to stop the supply of cooling water. The fluid is a tank 31, a pump 30, a jacket part 5, and an ejector 3.
2 is circulated, and the water is gradually raised and depleted by the heat from the reaction vessel 21 and the heat generated by the circulation. When the water temperature rises to a certain degree as detected by the temperature sensor 41, the valve 72 is closed, the low temperature steam outlet 37 and the fluid supply port 6 are shut off by the valve device 23b, and the high temperature steam outlet 35 and the fluid supply port 6 are shut off by the valve device 23a. Communicate. High temperature steam is supplied to the jacket part 5,
Since the fluid temperature within the jacket portion 5 at this time is rising, rapid condensation of high-temperature steam does not occur, and no hammer phenomenon occurs.

In this embodiment, a reaction pot was used as the steam heating and vaporization cooling device, but other distillation devices, sterilization devices, etc. can be used in the same manner.

<Effects of the Invention> According to the present invention, when switching from heating to cooling or from cooling to heating, the temperature of the fluid supplied to the steam heating and vaporization cooling chambers is gradually changed to prevent rapid condensation of steam. Therefore, the hammer phenomenon does not occur, and damage to the heating/cooling device and shortening of its lifespan can be prevented. Furthermore, since the cooling chamber is depressurized and evaporatively cooled during cooling, a large heat capacity can be secured, uneven cooling can be prevented, and product quality can be maintained at a constant level. In addition, during cooling, the pump discharge water is turned into minute water droplets and supplied to the cooling chamber along with low-temperature steam.
The cooling water becomes water droplets and mist, and uniform and rapid evaporative cooling can be performed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the schematic structure of an embodiment of the steam heating and evaporative cooling device of the present invention, and FIG. 2 is a diagram showing the vortex tube 26 of FIG. 1.
Fig. 3 is an enlarged sectional view taken along the line A-A in Fig. 2, Fig.
The figure is a schematic diagram showing an example of a conventional HA thermal cooling device. 5: Jacket part 6: Fluid supply port 22. Pump device 23a, 23b: Bensomon 24: Water temperature control section
25: Excess water discharge means 26: Whirlpool tube 27: Second ejector 28: Water extraction nozzle 30: Pump 31: Tank 35: High temperature steam outlet 32: Ejector 37: Low temperature steam outlet

Claims (1)

[Claims] 1. The diffuser of the ejector and the suction port of the pump are connected through a tank, and a control unit is provided for supplying cooling water into the tank to control the water temperature in the tank, and the discharge port of the pump is connected to the nozzle of the ejector. A pump device is provided with a discharge means for discharging excess water circulated by the pump to the outside of the system, and the ejector section of the pump device is connected to the steam heating and evaporative cooling chamber, and the steam heating and evaporative cooling chamber is connected to the pump device. A steam supply passage is provided in the chamber via a high-temperature steam outlet of a vortex tube that separates pressurized steam into high-temperature steam and low-temperature steam, and a valve device, and a water droplet is provided to convert a portion of the water discharged from the pump into minute water droplets. A second ejector and a diffuser are provided, the low-temperature steam outlet of the vortex tube is connected to the nozzle of the second ejector, and the second
A steam heating and evaporative cooling device that is provided with a evaporative cooling water supply passage that communicates a diffuser with a steam heating and evaporative cooling chamber via a valve device.