JP5426974B2 - Steam heating device - Google Patents

Description

 The present invention relates to a steam heating apparatus that heats an object to be heat-exchanged by reducing the pressure inside the heat exchange container.

The conventional steam heating device is provided with a supply path and valve means so that heating steam and a part of the discharged water of the pump device can be switched and supplied to the heating and cooling fluid chamber of the reaction kettle. The temperature change can be made gentle at the time of cooling or switching from cooling to heating.

In the conventional steam heating device described above, there is a problem that the heating temperature unevenness due to the steam is generated on the heat exchange surface of the heat exchange container, particularly when the heat exchange surface of the heat exchange container is horizontal, the heating temperature unevenness is generated. There was a problem.

JP-A-1-315336

  The problem to be solved is to obtain a steam heating device that does not cause uneven heating temperature due to steam even when the heat exchange surface of the heat exchange container is horizontal.

 The present invention connects a heating fluid supply pipe for supplying a heating fluid to a heat exchange container through a valve, and also connects a suction means for maintaining the inside of the heat exchange container in a reduced pressure state. In what heats the heat exchange object, the heating fluid is steam, the heat exchange vessel is a flat plate, a heat exchange surface is horizontally formed on the upper end surface of the flat plate heat exchange vessel, and the heating fluid Open a plurality of heat exchange vessel side ends of the supply pipe on the side opposite to the horizontal heat exchange surface, and provide a number of through holes between the plurality of heat exchange vessel side ends and the heat exchange surface. The porous member which has is attached.

  In the present invention, the heat exchange vessel is formed in a flat plate shape, and the plurality of heat exchange vessel side ends of the heating fluid supply pipe are opened on the side opposite to the horizontal heat exchange surface, whereby heat exchange is performed from the heating fluid supply pipe. The steam supplied to the container is supplied toward the bottom surface of the flat plate-shaped heat exchange container, and after colliding with the bottom surface, the steam is dispersed and supplied into the heat exchange container, so that the entire heat exchange surface is covered. It can be heated uniformly. By attaching the porous member between the plurality of heat exchange vessel side ends and the heat exchange surface, the vapor in the heat exchange vessel can be more uniformly dispersed.

It is a block diagram which shows the Example of the steam heating apparatus which concerns on this invention.

In the present invention, the plurality of heat exchange vessel side ends of the heating fluid supply pipe are opened on the side opposite to the horizontal heat exchange surface. The opening position depends on the shape of the heat exchange vessel. It can be selected as appropriate.

  In FIG. 1, a cylindrical and flat plate heat exchange vessel 1, a heat exchange surface 2 formed horizontally on the upper end surface of the heat exchange vessel 1, and a heating fluid supply for supplying steam to the inside of the heat exchange vessel 1 The steam heating device is constituted by the pipe 3 and the suction means 6 communicating below the heat exchange vessel 1.

A control valve 7 for controlling the amount of steam supplied to the heat exchange container 1 is attached to the heating fluid supply pipe 3. The plurality of heat exchange vessel 1 side ends 23 of the heating fluid supply pipe 3 are opened toward the bottom surface 20 opposite to the horizontal heat exchange surface 2. A flat plate-like porous member 19 having a large number of through holes is attached between the plurality of heat exchange vessel 1 side ends 23 and the heat exchange surface 2. Steam is supplied from the plurality of heat exchange container 1 side end portions 23 toward the bottom surface 20 of the heat exchange container 1 and further passes through the porous member 19 to be dispersed into the heat exchange container 1 and steam. Is supplied.

A cooling water supply pipe 5 for supplying cooling water to the heat exchange container 1 is connected so that the heat exchange container 1 can be cooled. The lower end of the cooling water supply pipe 5 is connected to a part of the suction means 6. The cooling water supply pipe 5 is connected to the inside of the heat exchange vessel 1 through a water ejector 11 and an automatic valve 12. When the automatic valve 12 is opened, cooling water is supplied into the heat exchange container 1. It is desirable to attach an injection nozzle capable of injecting cooling water to the heat exchange surface 2 side at the end portion 21 of the cooling water supply pipe 5 on the heat exchange container 1 side.

A steam supply pipe 16 is connected to the suction chamber of the water ejector 11 attached to the cooling water supply pipe 5. By supplying the heating steam from the steam supply pipe 16 to the cooling water flowing down in the water ejector 11, the temperature of the cooling water supplied to the heat exchange container 1 can be adjusted.

A cooling water circulation valve 18 is attached in parallel with the automatic valve 12 attached to the cooling water supply pipe 5. The cooling water circulation valve 18 always opens slightly when the heat exchange container 1 is cooled, and even if the automatic valve 12 is closed, a little cooling water is supplied into the heat exchange container 1 for cooling. A part of the water circulates constantly.

The arc-shaped bottom surface 20 of the heat exchange vessel 1 is connected to the inlet side of the steam trap 4 by a pipe line 8. An on-off valve 9 is attached in parallel with the steam trap 4. The outlet side of the steam trap 4 and the on-off valve 9 is connected to the suction chamber 10 of the liquid ejector 13 constituting the suction means 6.

The suction means 6 includes a liquid ejector 13, a cooling water tank 14, and a circulation pump 15. By driving the circulation pump 15, the cooling water in the cooling water tank 14 is supplied to the liquid ejector 13 to generate a predetermined suction force in the suction chamber 10, and the cooling water is supplied from the cooling water supply pipe 5 to the heat exchange container 1. To supply.

A cooling water supply pipe 30 is connected to the upper part of the cooling water tank 14, and a pipe on the discharge side of the circulation pump 15 is branched to connect an excess water discharge pipe 17.

When heating the heat exchange surface 2, the heat exchange surface 2 is heated by steam by supplying a predetermined amount of steam from the heating fluid supply pipe 3 and the control valve 7 into the heat exchange container 1. The plurality of heat exchange container 1 side ends 23 of the heating fluid supply pipe 3 are opened toward the bottom surface 20 on the side opposite to the horizontal heat exchange surface 2 and the porous member 19 is attached. Steam is supplied by being dispersed into the exchange container 1, and heating temperature unevenness can be prevented and the entire heat exchange surface 2 can be uniformly heated.
Condensate condensed with steam by heating passes from the pipe line 8 at the lower end of the heat exchange vessel 1 through the steam trap 4 and further from the liquid ejector 13 to the cooling water tank 14.

On the other hand, when cooling the heat exchange surface 2, the automatic valve 12 of the cooling water supply pipe 5 is opened and the cooling water is supplied to the bottom surface of the heat exchange surface 2, so that the cooling water is cooled by the heat of the heat exchange surface 2. Evaporates and cools with the latent heat of vaporization, so that the cooling efficiency can be improved.
The vaporized vapor and the cooling water that has not been vaporized pass from the conduit 8 through the on-off valve 9 and further from the liquid ejector 13 to the cooling water tank 14.

  It can be applied as various steam heating devices that perform indirect heating.

DESCRIPTION OF SYMBOLS 1 Heat exchange container 2 Heat exchange surface 3 Heating fluid supply pipe 5 Cooling water supply pipe 6 Suction means 7 Control valve 10 Suction chamber 13 Liquid ejector 14 Cooling water tank 15 Circulation pump 19 Porous member 23 End part of heat exchange container

Claims (1)

A heating fluid supply pipe for supplying a heating fluid to the heat exchange vessel via a valve is connected,
And connected to a suction means for maintaining the interior of the heat exchanger vessel in a reduced pressure state,
In what heats the heat exchange object of the heat exchange container,
While the heating fluid is steam,
The heat exchange vessel is a flat plate, and a heat exchange surface is formed horizontally on the upper end surface of the flat plate heat exchange vessel.
Wherein a plurality of heat exchanger vessel-side end of the heating fluid supply pipe, wherein the horizontal shape of the heat exchange surface and open toward the bottom surface of the heat exchanger vessel of the opposite side,
Between the heat exchange surface and the plurality of heat exchanger vessel end, the steam heating device, characterized in that fitted with porous member having a large number of through-holes.