JP2011064350A - Steam heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a steam heating device preventing unevenness of heating temperature by steam even when a heat exchange face of a heat exchange vessel is horizontal. <P>SOLUTION: A heating fluid supply pipe 3 is connected to the heat exchange vessel 1 via a control valve 7. A plurality of heat exchange vessel 1 side ends 23 of the heating fluid supply pipe 3 are opened toward a bottom face 20 on the side opposite to the horizontal heat exchange face 2. The heat exchange face 2 is arranged on the upper face of the heat exchange vessel 1. A porous member 19 is mounted between the plurality of heat exchange vessel 1 side ends 23 and the heat exchange face 2. A lower side of the porous member 19 serves as a condensation reservoir part 22. Since steam supplied from the heat exchange vessel 1 side ends 23 of the heating fluid supply pipe 3 is dispersed and supplied to inside of the heat exchange vessel 1, steam heating is enabled without causing uneven temperature. <P>COPYRIGHT: (C)2011,JPO&INPIT

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. A porous member having a condensate reservoir for storing condensate condensed with steam is provided below the porous member.

  In the present invention, the steam supplied from the heating fluid supply pipe to the heat exchange container is supplied to the condensate reservoir, and the condensate is heated to generate re-evaporated steam. By passing through the porous member and passing through the porous member, the heat exchange surface is dispersed and supplied, whereby the entire heat exchange surface can be uniformly heated.

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 container 1 side ends 23 of the heating fluid supply pipe 3 are opened in the condensate reservoir 22 toward the bottom surface 20 on the side 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. A condensate reservoir 22 is formed in the lower part of the porous member 19. A pipe 24 is connected to the lower end surface of the porous member 19 and a steam trap 25 is attached. The condensate reservoir 22 maintains a state where condensate is accumulated up to the position of the pipe line 24. When steam is supplied from the plurality of heat exchange container 1 side end portions 23 to the condensate in the condensate reservoir 22, the condensate is re-evaporated into steam, and further passes through the porous member 19. The steam is supplied dispersed in the heat exchange vessel 1.

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. By supplying steam from the plurality of heat exchange container 1 side ends 23 of the heated fluid supply pipe 3 into the condensate in the condensate reservoir 22, the condensate is re-evaporated into steam and passes through the porous member 19. In this way, the steam is dispersed and supplied into the heat exchange container 1, and the heating temperature unevenness can be prevented, and the entire heat exchange surface 2 can be uniformly heated.
Condensate condensed with steam by heating is discharged to the outside from a steam trap 25 connected to a conduit 24, or passes from the conduit 8 at the lower end of the heat exchange vessel 1 through the steam trap 4 and further cooled from the liquid ejector 13. The water tank 14 is reached.

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 22 Condensate reservoir 23 Heat exchange container side edge

Claims (1)

  A heating fluid supply pipe for supplying a heating fluid to the heat exchange container via a valve is connected, and a suction means for maintaining the inside of the heat exchange container in a decompressed state is connected, so that the heat exchange object of the heat exchange container The heating fluid is steam, the heat exchange vessel is flat, a heat exchange surface is formed horizontally on the upper end surface of the plate heat exchange vessel, and a plurality of heating fluid supply pipes are formed. A porous member having a large number of through holes between a plurality of heat exchange vessel side ends and the heat exchange surface, with the end portion on the side of the heat exchange vessel being opened to the side opposite to the horizontal heat exchange surface And a condensate reservoir for storing condensate condensed with steam is provided below the porous member.