JP2011062597A - Steam heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam heater capable of preventing heating-temperature unevenness by steam heating from arising even if the heat exchanging face of its heat exchanging container is horizontally disposed. <P>SOLUTION: A heating-fluid feed pipe 3 is connected to a heat exchanging container 1 via a control valve 7. A steam deflection member 19 is attached to a position opposing the end part 23 of the heating-fluid feed pipe 3 disposed in the heat exchanging container 1. A heat exchanging face 2 is disposed on the upper face of the heat exchanging container 1. The bottom face 20 of the heat exchanging container 1 is connected to a suction chamber 10 of a sucking device 6 via a pipeline 8. The sucking device 6 is constituted of a liquid ejector 13, a cooling water tank 14, and a circulation pump 15. Steam supplied from the end part 23 of the heating-fluid feed pipe 3 disposed in the heat exchanging container 1 is distributed and supplied in the direction of the heat exchanging face 2, and thereby the heat exchanging face 2 is heated by steam without temperature unevenness. <P>COPYRIGHT: (C)2011,JPO&amp;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. When heating a heat exchange object, the heating fluid is steam, and it collides with the steam at a position facing the heat exchange container side end of the heating fluid supply pipe, and the flow is changed to the heat exchange object side. A steam deflecting member for deflecting to the heat is attached, and the steam for heating is distributed and supplied into the heat exchange container.

  In the present invention, a steam deflection member is attached at a position opposite to the end portion of the heating fluid supply pipe on the side of the heat exchange container, so that the steam for heating into the heat exchange container is distributed and supplied by the steam deflection member. The entire heat exchange surface can be heated uniformly.

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

In the present invention, a steam deflecting member that collides with steam is attached at a position facing the end of the heated fluid supply pipe on the side of the heat exchange container. The steam deflecting member may be a flat plate shape, a cylindrical shape, It is possible to appropriately select a cylinder or the like that can supply the steam in a distributed manner by deflecting the steam flow toward the heat exchange object.

  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. A steam deflection member 19 is attached at a position facing the end portion 23 of the heating fluid supply pipe 3 on the heat exchange container 1 side. In this embodiment, an example is shown in which a vapor deflecting member 19 having a flat plate shape with an inverted cross-section is attached. By providing this vapor deflection member 19, the vapor supplied from the heating fluid supply pipe 3 is distributed and supplied into 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. The steam deflecting member 19 is attached at a position facing the end portion 23 of the heating fluid supply pipe 3 on the heat exchange container 1 side, so that the steam supplied from the heating fluid supply pipe 3 is dispersed into the heat exchange container 1. The heating temperature unevenness due to the steam is 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 Steam deflection member 23 End part of heat exchange container

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 depressurized state is connected, so that the heat exchange object of the heat exchange container In which the heating fluid is steam, and the steam collides with the steam and deflects the flow toward the heat exchange object at a position opposed to the heat exchange container side end of the heating fluid supply pipe. A steam heating apparatus, wherein a deflection member is attached and heating steam is dispersedly supplied into a heat exchange container.