JPH10176888A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat exchanger in which vapor and drain are discharged even when noncondensable gas is contained in the vapor. SOLUTION: A gas/liquid separator 5 is mounted on an atmosphere opening pipe 4 in a heat exchange container 1. On the gas/liquid separator 5 there are provided collision/deflection plates 11, 13 and a turning blade member 12 for colliding, deflecting or turning a mixed fluid of gas and liquid. The mixed fluid of noncondensable gas, drain, and vapor passing through the atmosphere opening pipe 4 is separated in gas and liquid in the gas/liquid separator 5, and the separated liquid drops into the atmosphere open pipe 4, and further the noncondensable gas as the gas is exhausted from an atmosphere communication hole 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam generator which heats and condenses remaining steam used in various steam-using devices and re-evaporated steam generated from a high-temperature drain with a cooling fluid such as water. The present invention relates to a method for effectively utilizing the retained heat of steam by eliminating steam that can accumulate therein, or separately using warm water whose temperature has been increased by heat exchange of a cooling fluid.

[0002]

2. Description of the Related Art A conventional heat exchanger of this type is disclosed, for example, in Japanese Patent Application Laid-Open No. 60-120186. This is achieved by installing a cooling pipe inside a heat recovery chamber having a steam supply port, connecting the air release section to this heat recovery chamber, and storing condensate in the air release section and the lower part of the heat recovery chamber.
It is possible to prevent non-condensable gas, for example, air, from flowing into the heat recovery chamber and efficiently exchange heat.

[0003]

In the above-mentioned conventional heat exchanger, it is possible to prevent the non-condensable gas from flowing in from outside the heat recovery chamber, but the non-condensable gas is contained in the steam supplied from the steam supply port. When mixed with water, there is a problem that a part of the steam or a part of the drain is discharged from the open-to-atmosphere portion to the outside due to the flow of the non-condensable gas. Vapors and drains discharged together with the non-condensable gas deteriorate the surrounding environment and must be prevented as much as possible.

[0004] Therefore, an object of the present invention is to solve the problem even when non-condensable gas such as air is mixed in supplied steam.
The purpose is to obtain a heat exchanger that does not discharge steam or drain to the outside.

[0005]

Means taken to solve the above problem is to supply steam and a cooling fluid to a heat exchange container provided with an open-to-atmosphere section, and to perform heat exchange of the steam with the cooling fluid. And a gas-liquid separator for separating gas-liquid flowing into the open-to-atmosphere portion.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Steam supplied to a heat exchange container is condensed by heat exchange by a cooling fluid. If non-condensable gas such as air is mixed in the supplied steam, the non-condensable gas is discharged to the outside from the open part to the atmosphere because it is not condensed by the cooling fluid. Part of the steam and drains reach the open air section.

By installing a gas-liquid separator in the open-to-atmosphere section, the mixing of steam and drain is promoted, and most of the steam is condensed to form water droplets, and the water-drop liquid is separated from non-condensable gas. Dripping in the open air section. Only the non-condensable gas from which the water droplets have been separated is discharged out of the system from the gas-liquid separator.

As the gas-liquid separator, a well-known gas-liquid separator can be used. However, in order to promote the mixing of the vapor and the liquid, it is necessary to swirl the fluid or impinge on the plate-like member or the filter member. It is desirable to use a gas-liquid separator that can.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a heat exchange vessel 1, a steam supply port 2 for supplying steam to be condensed, an overflow pipe 3 for discharging a drain condensed with steam, and a heat exchange vessel 1 are shown. A heat exchanger is constituted by an open-to-atmosphere pipe 4 provided at the center and serving as an open-to-atmosphere section, and a gas-liquid separator 5 attached to an upper portion of the open-to-atmosphere pipe 4.

In the heat exchange vessel 1, a cooling coil 7 communicating with a cooling fluid supply pipe 6 is disposed around the atmosphere opening pipe 4, and an upper part thereof communicates with a hot water discharge pipe 8. The steam supply port 2 provided in the upper part of the heat exchange vessel 1 is connected to an outlet side of a steam-using device (not shown) such as a blower or a shrink tunnel or a re-evaporation tank through a valve 9 to exchange steam for condensation. Supply to container 1.

An open-to-atmosphere pipe 4 provided at the center of the heat exchange vessel 1
The lower end 10 is opened below the heat exchange vessel 1, and the overflow tube 3 is attached to the center of the open-to-atmosphere tube 4. The steam supplied from the steam supply port 2 into the heat exchange container 1 is cooled by the cooling coil 7 and condensed, and accumulates in the lower part of the heat exchange container 1. The accumulated drain rises in the atmosphere open pipe 4 due to the pressure of the supplied steam and is discharged to the outside from the overflow pipe 3.

A gas-liquid separator 5 is mounted on the upper part of the open-to-atmosphere pipe 4. The gas-liquid separator 5 is of any type known in the art as long as it can separate the gas-liquid mixed fluid through a filter, by centrifugal force or swirling force, or by collision and adhesion phenomena. Although this can also be used, in the present embodiment, an example using a device which repeatedly performs collision and turning will be described. That is, the collision deflector 11, the revolving blade member 12 and the collision deflector 13 are provided inside the gas-liquid separator 5.
Are sequentially attached, and the air communication port 14 is provided at the upper end thereof.
Is provided.

When a large amount of non-condensable gas, such as air, is contained in the steam supplied from the steam supply port 2 to the heat exchange vessel 1, the gas accumulated in the heat exchange vessel 1 is discharged from the lower end of the atmosphere opening pipe 4. A part of the drain or the steam is entrained from 10 to the open-to-atmosphere pipe 4 to reach the gas-liquid separator 5 from the inside of the open-to-atmosphere pipe 4.
The mixed fluid of the non-condensable gas, the drain, and the vapor first collides with the collision deflecting plate 11 in the gas-liquid separator 5 to separate a part of the gas and liquid, and the flow is deflected to the central rotating blade member 12. You. In this case, the liquid that has been partially separated drops in the open-to-atmosphere tube 4 by its own weight. The mixed fluid that has reached the swirling blade member 12 is swirled, and the mixing of the steam and the drain is promoted, and the steam condenses. The mixed fluid that has passed through the swirling blade member 12 further collides with the collision deflecting plate 13 to separate gas and liquid, and only the non-condensable gas having a small mass is discharged from the upper air communication port 14 to the outside.

[0014]

According to the present invention, even when an uncondensed gas such as air is contained in the supplied steam, a gas-liquid separator is attached to the open-to-atmosphere portion and mixed into the non-condensable gas. Steam and drain can be separated, and only non-condensable gas can be discharged to the outside, so that deterioration of the surrounding environment can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a heat exchanger according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchange container 2 Steam supply port 3 Overflow pipe 4 Open-to-atmosphere pipe 5 Gas-liquid separator 6 Cooling fluid supply pipe 7 Cooling coil 11 Colliding deflecting plate 12 Rotating blade member 13 Colliding deflecting plate 14 Atmospheric communication port

Claims (1)

[Claims] 1. A method for supplying steam and a cooling fluid to a heat exchange container provided with an open-to-atmosphere portion and condensing the steam by exchanging heat with the cooling fluid to separate gas and liquid flowing into the open-to-atmosphere portion. A heat exchanger equipped with a gas-liquid separator.