JP2745269B2 - High temperature evaporative cooling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-temperature evaporative cooling device for evaporating and cooling an object to be cooled having a relatively high temperature of about 100.degree. Specifically, the present invention relates to a cooling device for various foods, medical products, fibers, paper, pulp, and the like.

[0002]

2. Description of the Related Art A conventional high-temperature cooling device as shown in FIG. 2 has been used. A heat exchanger 1 through which an object to be cooled passes, and a jacket 2 provided on the outer periphery of the heat exchanger 1
A cooling fluid supply pipe 3 for supplying a cooling fluid to the jacket portion 2; an ejector 5 connected to the cooling fluid supply pipe 3 for generating a cooling fluid; a steam supply pipe 6 connected to the ejector 5; A water pipe 7, a pump 8 for supplying cooling water, a temperature sensor 9 for detecting cooling water temperature,
Steam control valve 10 that opens and closes according to the detection signal of temperature sensor 9
And a cooling fluid discharge pipe 4 for discharging the cooling fluid from which heat has been exchanged from the jacket portion 2. The steam from the steam supply pipe 6 and the cooling water from the cooling water pipe 7 are mixed by the ejector 5 to produce hot water of 100 ° C. or higher and supplied to the jacket 2 as cooling water. The temperature of the cooling water is detected by the temperature sensor 9 and the amount of supplied steam is determined by the steam control valve 1.
By controlling at 0, cooling water at a desired temperature is supplied.

[0003]

The conventional high-temperature cooling apparatus described above has a problem that the temperature of the cooling water tends to vary, it is difficult to cool the cooling water at a constant temperature, and cooling unevenness occurs. This is because the cooling water is generated by mixing steam and water using an ejector, and thus the temperature varies. The ejector usually causes a variation in the temperature of the mixed fluid when the temperature difference between steam and water is several degrees to 10 degrees C or more.

In the above-mentioned conventional high-temperature cooling device,
Since an ejector, a pump, and a temperature sensor are required, there is a problem that the apparatus becomes expensive.

Accordingly, it is an object of the present invention to provide a high-temperature cooling device which is inexpensive and does not cause cooling unevenness.

[0006]

The structure of the high-temperature evaporative cooling system of the present invention is as follows. A heat exchanger for containing and cooling the object to be cooled, a cooling fluid supply pipe for supplying a cooling fluid to the heat exchanger, and a cooling fluid discharge pipe for discharging the cooling fluid that has exchanged heat with the object to be cooled from the heat exchanger And the road,
The cooling fluid supply line is connected to the heat exchanger via a pressure control valve and a condensate generator, and the cooling fluid discharge line is connected to the heat exchanger via throttling means for maintaining a predetermined opening. is there.

[0007]

The steam at a predetermined pressure is supplied to the condensate generator from the pressure control valve provided in the cooling fluid supply pipe. Condensate of a predetermined pressure, that is, temperature is generated in the condensate generator and supplied to the heat exchanger. This is because the temperature and pressure of steam and saturated water are uniquely determined. In the heat exchanger, the condensed water is vaporized by removing the heat of the object to be cooled, thereby evaporating and cooling the object to be cooled. Since the pressure from the pressure control valve to the condensate generator and the heat exchanger is maintained at a predetermined pressure, ie, temperature, there is no occurrence of temperature unevenness, ie, cooling unevenness. The vaporized vapor generated by the cooling and part of the cooling water that has not been completely vaporized are discharged out of the system through the cooling fluid discharge pipe via the throttle means.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The same members as those in FIG. 2 as a conventional example are denoted by the same reference numerals and described. The heat exchanger 1, the jacket 2, the cooling fluid supply pipe 3, and the cooling fluid discharge pipe 4, through which an object to be cooled passes, constitute a high-temperature evaporative cooling device. Steam as a high-temperature cooling fluid passes through the cooling fluid supply pipe 3, and is connected to the jacket 2 via a pressure reducing valve 11 as a pressure control valve and a condensate generator 12. A cooling water pipe 13 for condensing steam is separately connected to the condensate generator 12 via a valve 14 and a bypass passage 15. A temperature sensor 9 for detecting the temperature of the jacket portion 2 is attached and connected to an actuator portion of the valve 14 via a controller 17 for controlling opening and closing of the valve 14. The cooling water pipe 13 is not always necessary when supplying a certain amount of condensed water, and is not necessary when a closed tank is used as the condensate generator 12.

A valve 20 as throttle means is connected to the cooling fluid discharge pipe 4 and connected to the jacket portion 2, and a steam trap 21 is mounted in parallel with the valve 20. The valve 20 can maintain a predetermined opening degree by adjusting the opening degree. Steam trap 2
1 is a kind of automatic valve which discharges only condensate but does not discharge steam. Although the valve 20 is provided as the throttling means, an orifice having a fixed opening may be used.

Next, the operation will be described. When the object to be cooled is cooled, steam reduced to a predetermined pressure by the pressure reducing valve 11 is supplied to the condensate generator 12. Steam is exchanged by the cooling water supplied from the cooling water pipe 13 in the condensing generator 12 to become condensed water,
The cooling target is supplied to the jacket portion 2 and cools the cooling target by removing heat from the cooling target in the heat exchanger 1 and evaporating the same. Assuming that the set pressure of the pressure reducing valve 11 is, for example, 1.8 KG, the temperature of the condensed water as the saturated water is 130 ° C.
The object to be cooled at the above temperature can be cooled down to 130 ° C. The re-evaporated vapor which has been re-vaporized is supplied to the cooling fluid discharge line 4.
From the system through the valve 20. Further, a part of the condensed water that cannot be vaporized is discharged from the steam trap 21 to the outside of the system.

[0011]

According to the present invention, it is only necessary to provide a pressure control valve, a condensate generator and a throttling means, and an ejector, a pump and a temperature sensor are not required, so that the apparatus can be inexpensive and the steam can be reduced. By maintaining the temperature of the condensed water as the cooling water at a constant value by the pressure control valve, the cooling unevenness does not occur.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of a high-temperature evaporative cooling device of the present invention.

FIG. 2 is a configuration diagram showing a conventional example of a high-temperature cooling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Jacket part 3 Cooling fluid supply pipe 4 Cooling fluid discharge pipe 11 Pressure reducing valve 12 Condensate generator 20 Throttling means 21 Steam trap

Claims (1)

(57) [Claims] 1. A heat exchanger for containing and cooling an object to be cooled,
A cooling fluid supply line for supplying a cooling fluid to the heat exchanger;
A cooling fluid discharge line for discharging a cooling fluid that has exchanged heat with the object to be cooled from the heat exchanger, wherein the cooling fluid supply line is connected to the heat exchanger via a pressure control valve and a condensate generator. A high-temperature evaporative cooling device connected to a heat exchanger via a throttle means for maintaining a predetermined opening degree in the cooling fluid discharge pipe.