JP2546583Y2 - Decompression evaporative cooling equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reducing the pressure in a cooling chamber, evaporating supplied cooling water to vaporize and cool an object to be cooled. As the reduced pressure evaporative cooling device,
There are various types of reactor cooling and food cooling devices.

[0002]

2. Description of the Related Art As a conventional reduced-pressure evaporative cooling device, there is one disclosed in Japanese Utility Model Laid-Open No. 3-48683, for example. Form a jacket as a vaporization cooling chamber on the outer circumference of the reaction vessel,
This jacket part and the pump device as a vacuum pump,
These are connected by a communication passage or a bypass passage to maintain a predetermined vacuum state in the jacket chamber, supply cooling water to the jacket portion, and vaporize and cool the reaction vessel by latent heat of evaporation of the cooling water. By connecting the jacket section and the pump device through a plurality of passages, the degree of pressure reduction in the jacket section is to be maintained in a stable state.

[0003]

The above-mentioned conventional decompression evaporative cooling apparatus has a problem that the degree of decompression in the evaporative cooling chamber cannot always be maintained in a stable state. Since the evaporative cooling chamber and the vacuum pump are connected by a communication path or a bypass path having a bent portion, a pressure loss occurs due to pipe resistance, and the pressure loss is caused by a change in a load to be cooled. Because of the change, the degree of reduced pressure cannot be maintained in a stable state. To avoid the effects of passages and pipe resistance, a large-capacity vacuum pump with a large safety factor can be used, but large vacuum pumps are expensive in themselves and have a high running cost, which makes them practical. Not a target.

[0004] Therefore, a technical problem of the present invention is to prevent a decrease in the degree of pressure reduction in the evaporative cooling chamber by allowing both liquid and gas in the evaporative cooling chamber to be sucked.

[0005]

The structure of the reduced pressure evaporative cooling device of the present invention is as follows. The evaporative cooling chamber is depressurized by a vacuum pump composed of an ejector-type combination pump in which an ejector and a pump are combined, and cooling water is supplied to the evaporative cooling chamber to evaporate and cool the object to be cooled. The fluid discharge port provided is directly connected to the ejector of the vacuum pump without using a member that generates a pressure loss such as a bent portion, and a vacuum pump composed of an ejector-type combination pump is disposed immediately below the evaporative cooling chamber. is there.

[0006]

[Function] By disposing a vacuum pump in the immediate vicinity of the evaporative cooling chamber and eliminating bent parts between them, the vaporized vapor generated by cooling the object to be cooled in the evaporative cooling chamber causes a pressure loss. Is sucked by the vacuum pump and discharged out of the system.

[0007]

EXAMPLE In this example, an example is shown in which a reactor is used as a cooling device and an ejector combination pump is used as a vacuum pump. In FIG. 1, a reaction vessel 21 and a vacuum pump 22
And the cooling water supply pipe 28 constitute a reduced pressure evaporative cooling device.
The reaction vessel 21 has a jacket 5 as a vaporizing cooling chamber, similarly to the conventional one, and the jacket 5 is provided with a cooling water supply port 6 and a fluid discharge port 7.

The vacuum pump 22 comprises an ejector 32 and a pump 3
The pump 30 is connected to the tank 31 on the suction side, the discharge side is connected to the nozzle 33 of the ejector 32, and the diffuser of the ejector 32 is connected.
The ejector 32 and the fluid outlet 7 of the jacket portion 5 have a configuration in which the
And are directly connected without any intervening bends or the like. In this embodiment, an example is shown in which the valve 23 is attached to switch or control the fluid to the ejector 32. Valve 23 is shown in FIG.
As shown in FIG. 2, a structure called a Y-type valve which minimizes pressure loss is suitable.

The vacuum pump 22 supplies the water in the tank 31 to the ejector 32 by the operation of the pump 30 and causes the ejector 32 to suction the water, and returns the water to the tank 31.

The cooling water supply pipe 28 is connected to the tank 31 via a valve 70 and to the cooling water supply port 6 via a valve 26. The cooling water supply port 6 is desirably provided over the entire circumference of the reaction vessel 21 in order to prevent cooling unevenness. Although not shown, it is desirable to arrange a nozzle for spraying cooling water at the cooling water supply port 6.
Part of the cooling water is supplied to the tank 31 via the valve 70.
By supplying cooling water into the tank 31, the tank 3
1 is controlled. The valve 70 opens and closes based on a signal from a temperature sensor 41 that detects the temperature of the water in the tank 31.

The vacuum pump 22 is provided with a surplus water discharging means 25. The surplus water discharging means 25 is provided with a three-way valve 71 for keeping the water level in the tank 31 within a predetermined range based on signals from water level sensors 42 and 43 in the tank 31.

By switching the three-way valve 71, part of the circulating water circulating through the vacuum pump 22 can be used as cooling water for the reactor 21. The valve 76 opens and closes the heating steam supply pipe 27 when performing not only cooling but also heating. When performing heating,
Steam trap 5 attached to the bottom of jacket 5
The jacket 5 and the ejector 32 can be connected via the valve 0 and the valve 51, and the upper part of the jacket 5 and the ejector 32 can be connected via the valve 56. Each of the valves 23, 26, 51, 56, 70, 71, 76 is connected to a control unit (not shown) to enable centralized control.

When cooling the reactor 21, the vacuum pump 2
2 and the valve 23 is opened to open the jacket 5.
The inside is maintained at a predetermined vacuum state. Next, the valve 26 is opened to supply cooling water to the jacket portion 5. The supplied cooling water is immediately vaporized by the heat of the reaction vessel 21 to cool the reaction vessel 21. The vapor which has been vaporized by cooling and the cooling water which has not been completely vaporized are sucked into the ejector 32 provided immediately near the jacket portion 5, so that no pressure loss occurs.

The fluid sucked by the ejector 32 is supplied to the tank 3
Leads to 1. When the water level in the tank 31 reaches a predetermined level, the three-way valve 71 is operated by the water level sensor 42 and is discharged out of the system as surplus water. The degree of vacuum of the vacuum pump 22, that is, the degree of pressure reduction of the ejector 32, is substantially arbitrary if the temperature of the water in the tank 31 is adjusted by supplying cooling water in order to become a saturation pressure with respect to the temperature of the fluid passing through the nozzle 33. Can be controlled.

[0015]

According to the present invention, since the vaporized vapor is sucked into the vacuum pump without causing a pressure loss, the degree of decompression changes even when the load to be cooled changes and the amount of vaporized vapor changes. And a stable reduced pressure state can be maintained.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of a Y-type valve used in the reduced pressure evaporative cooling device of the present invention.

[Explanation of symbols]

 Reference Signs List 5 jacket 6 cooling water supply port 7 fluid discharge port 21 reaction vessel 22 vacuum pump 23 valve 28 cooling water supply pipe 30 pump 31 tank 32 ejector

Claims (1)

(57) [Scope of request for utility model registration] 1. Combination of an ejector and a pump in a vaporization cooling chamber
Was reduced by a vacuum pump consisting of ejector type combination pump supplies the cooling water to the vaporization cooling chamber, in which evaporative cooling of the object to be cooled, it is provided below the evaporative cooling chamber fluid
Together connected directly without Rukoto using a member pressure loss occurs, such as the ejector the bend outlet and the vacuum pump, et
A reduced-pressure evaporative cooling device in which a vacuum pump composed of a Zecta type combination pump is disposed immediately below the evaporative cooling chamber.