JP2003207288A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a heat exchanger not exhausting vapor and drain to the outside even when a large amount of uncondensed gas and vapor flow in at high speed. <P>SOLUTION: A vapor supply port 2 and a cylindrical atmosphere release pipe 5 are attached to a heat exchanger container 1. A plurality of cooling fluid supply nozzles 9, 11, 12, 14, and a first mixture passing member 6 are attached in the heat exchanger container 1. A through hole 17 and a gas-liquid separating member 15 are installed to the atmosphere release pipe 5. A second mixture passing member 7 is attached to the through hole 17, and a third mixture passing member 8 is attached to the center of the atmosphere release pipe 5. A second gas-liquid separating member 16 is arranged at the top of the atmosphere release pipe 5. As to the vapor and the uncondensed gas flowing from the vapor supply port 2, the vapor is condensed at the first and second mixture passing members 6, 7, and gas and liquid are separated at the gas-liquid separating member 15. The vapor is further condensed at the third mixture passing member 8, and finally the vapor is captured by a mesh member 26 of the second gas-liquid separating member 16, so as to discharge only the uncondensed gas from an outlet opening 28. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention heat-exchanges steam remaining in various steam-using devices, re-evaporated steam generated from a high-temperature drain where steam is condensed, with a cooling fluid such as water. Accordingly, the present invention relates to a heat exchanger that eliminates steam that can enter the muddy room, or separately uses hot water whose temperature has risen by exchanging heat between a cooling fluid and steam, thereby effectively utilizing the heat retained by the steam.

[0002]

2. Description of the Related Art A conventional heat exchanger of this type is disclosed in, for example, Japanese Patent Laid-Open No. 11-37668.
This is a system in which a filter section is provided in the atmosphere opening section and a second cooling fluid supply section is arranged on the outlet side of this filter section, and non-condensing gas such as air is mixed in the steam to be heat-exchanged. However, by capturing and cooling the steam and drain in the filter section, the steam rising up to the outside is not discharged.

[0003]

In the above-mentioned conventional heat exchanger, when a large amount of vapor and a mixed fluid of drain and non-condensable gas pass through the filter section at high speed, only the vapor and drain are reliably captured. However, there was a problem that it was not possible to completely prevent the steam rising up to the exit side because it could not be cooled. When a large amount of drain and a mixed fluid of steam and non-condensable gas flow in at high speed, some drain and steam will penetrate the filter, depending on the volume ratio and effective length of the filter. is there.

Therefore, an object of the present invention is to obtain a heat exchanger that does not discharge steam or drain to the outside even when a large amount of steam or drain flows in at high speed.

[0005]

[Means for Solving the Problems] Means for solving the above-mentioned problems are to supply steam and a cooling fluid to a heat exchange container provided with an atmosphere opening portion, and exchange the heat of the steam with the cooling fluid. In what is condensed by, a mixing passage member for mixing and passing the steam and the cooling fluid in the heat exchange container,
A gas-liquid separating member for separating a fluid into a gas and a liquid is arranged.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION By arranging the mixing passage member and the gas-liquid separating member in the heat exchange container, first, the mixing passage member surely mixes the steam and the cooling fluid to condense the steam,
Subsequently, the gas-liquid separating member separates the drain, which has become a liquid by condensing the cooling fluid and the vapor, from the non-condensable gas such as air. A part of the vapor that remains without being mixed and cooled with the cooling fluid by the mixing passage member is condensed by being mixed with the cooling fluid again by the gas-liquid separation member to become drain, and then this gas-liquid separation is performed. Gas-liquid separation is performed by the member. The non-condensable gas from which vapor and drain have been separated is discharged from the gas-liquid separating member to the outside of the system.

As a mixing passage member for mixing and passing the steam and the cooling fluid, a punching plate in which a large number of through holes are formed in a plate of metal or synthetic resin, a filter in which fine wires made of metal or synthetic resin are laminated, or Laminated glass fiber or porous sintered metal, or
A combination of these can be used.

As the gas-liquid separating member, a mixed fluid of gas and liquid is swirled to separate the gas-liquid by centrifugal force, or the mixed fluid is made to collide with a rigid body to separate the gas-liquid, or Among them, conventionally known ones such as those that separate gas and liquid by passing only gas through the filter part can be used.

By arranging a plurality of mixing passage members and a plurality of gas-liquid separating members alternately, the mixing passage member, the gas-liquid separating member, the mixing passage member, and the gas-liquid separating member can be arranged, and the outlet side can be more reliably provided. You can extinguish the rising steam and rising steam.

[0010]

EXAMPLE In FIG. 1, a cylindrical heat exchange container 1 and a steam supply port 2 for supplying steam to be condensed into the heat exchange container 1
And liquid discharge pipes 3 and 4 for discharging the condensed drain of the steam and the cooling fluid, a cylindrical atmosphere release pipe 5 as an atmosphere release unit concentrically provided in the center of the heat exchange container 1, and an atmosphere release pipe. 5 and the mixing passage members 6, 7 attached to the heat exchange container 1,
8 and cooling fluid supply nozzles 9, 10, 11, 12, 1
The heat exchangers 3 and 14 and the gas-liquid separating members 15 and 16 arranged above and below the atmosphere open pipe 5 constitute a heat exchanger.

Cooling fluid supply nozzles 9, 10, 11, 1
Nos. 2, 13 and 14 are connected to the cooling fluid supply pipe 18 through the on-off valves, respectively, so that the nozzles 9, 10, 1
Cooling fluid is jetted from the tip portions of 1, 12, 13, 14 or the oblique side portions.

A flat plate donut-shaped first mixing / passing member 6 having a through hole into which the atmosphere opening pipe 5 can be inserted is attached to the center of the cylindrical heat exchange container 1. The first mixing / passing member 6 is formed by laminating a mesh member made of thin metal wires on a punching plate in which a large number of through holes are provided in a thin metal plate. The mesh member is preferably about 10 to 20 mesh.

A steam supply port 2 provided in the upper part of the heat exchange container 1.
Is connected to an outlet side of a steam using device such as a blower or a shrink tunnel (not shown), a re-evaporation tank or the like, and supplies steam to the heat exchange container 1 for condensation.

The steam supplied from the steam supply port 2 into the heat exchange container 1 flows downward through the mixing passage member 6.
In this case, the cooling fluid injected from the upper cooling fluid supply nozzles 9 and 11, for example, the cooling water and the steam flow in substantially the same direction, and a part of the steam and the cooling water flow down while being mixed, and the steam that is not mixed is mixed. And the cooling water collide with the mixing passage member 6 to promote the mixing of the steam and the cooling water, and the steam condenses to drain. The drain, the remaining cooling water, and a part of the steam left without being mixed flow downward through the gaps of the mesh member of the mixing passage member 6 and the through holes of the punching plate.

Two through holes 17 are provided symmetrically in the center of the side surface of the gas-liquid separating member 15 below the atmosphere opening pipe 5. Inside the through hole 17, a second mixing / passing member 7 having a size that covers the entire surface of the through hole 17 is attached. The second mixing / passing member 7 is also formed by laminating a mesh member on a punching plate. The mixed fluid of drain, cooling water, and steam that has passed through the first mixing / passing member 6 passes through the through hole 17 and the second mixing / passing member 7 to promote the mixing of the remaining steam and cooling water. , The amount of steam left is reduced.

The mixed fluid of the drain, which has passed through the second mixing / passing member 7, cooling water, and part of the remaining steam and non-condensable gas is separated by the gas-liquid separating member 15 into a gas and a liquid.
In the atmosphere open pipe 5, the direction is changed upward, and the gas is discharged to the outside through the third mixing passage member 8 and the upper gas-liquid separation member 16. On the other hand, the liquid separated by the gas-liquid separation member 15 drops on the bottom of the atmosphere open pipe 5.

As shown in FIG. 2, the gas-liquid separating member 15 is constituted by a collision plate having an L-shaped cross section, which is attached so as to face a through hole 17 provided in the lower portion of the atmosphere opening pipe 5. The mixed fluid of the drain, the cooling water, a part of the steam and the non-condensable gas that has passed through the second mixing / passing member 7 collides with the gas / liquid separating member 15 to separate the gas / liquid, and the separated liquid is opened to the atmosphere. The mixed fluid of vapor, liquid, and non-condensed gas that remains partially while dripping at the bottom of the pipe 5 moves upward from the opening 20 of the collision plate 15 while swirling clockwise in the atmosphere open pipe 5.

In the atmosphere opening pipe 5, the opening 2 of the collision plate 15 is provided.
Separate plates 21 are attached to the 0 side, respectively. Separated version 21
Is a structure in which a gap 22 is provided on the collision plate 15 side, and the other end side is fixed to the inner circumference of the atmosphere open pipe 5, and the opening 2 of the collision plate 15 is
When the mixed fluid of vapor, liquid, and non-condensed gas that has swirled from 0 collides with the separation plate 21, mixed condensation of the remaining vapor and liquid is promoted, and gas-liquid separation is promoted. At the same time, the swirling flow is weakened as it goes upward in the atmosphere open pipe 5.

The liquid separated by the separation plate 21 is also dropped on the bottom of the atmosphere open pipe 5. A swirl prevention plate 23 is attached to the bottom of the atmosphere open pipe 5 over the entire length of the inner diameter of the pipe 5. The swirl flow prevention plate 23 prevents the liquid accumulated at the bottom of the atmosphere open pipe 5 from swirling and causing the liquid surface to swell. Atmosphere open pipe 5
The liquid accumulated at the bottom of the liquid is discharged from the liquid discharge pipe 3 to the outside of the system. Similarly, the mixed liquid of the cooling fluid and the drain accumulated in the bottom of the heat exchange container 1 is discharged from the liquid discharge pipe 4 to the outside of the system.

A second gas-liquid separating member 16 is arranged at the upper end of the atmosphere opening pipe 5. The second gas-liquid separating member 16 includes the inner pipe 24.
And the outer tube 25, the mesh member 26 is attached to the upper opening of the inner tube 24 to capture the remaining steam until the end, and the non-condensed gas is discharged from the outlet opening 28 to the outside of the system. As the mesh member 26, it is preferable to stack a plurality of mesh members of about 60 mesh, for example, 2 to 6 and arrange them horizontally.

A mesh member 27 is also provided below the outlet opening 28 of the outer pipe 25 to prevent the steam drain captured by the upstream mesh member 26 from colliding and scattering.

The mixed fluid of the vapor, the liquid and the non-condensable gas, which has risen in the atmosphere open pipe 5 and remains until the end, rises from the lower end of the inner pipe 24, reverses its direction, and passes through the mesh member 26. , And collides with the lower mesh member 27 to reverse the direction again, and only the non-condensable gas is discharged to the outside from the outlet opening 28.

The cooling fluid supply nozzle 10 is attached to the upper center of the inner pipe 24. This nozzle 10 is connected to the atmosphere open pipe 5
The cooling fluid can be injected to the mixed fluid rising in the inner and inner tubes 24, and the cooling fluid and the fluid containing the vapor are mixed to condense the vapor. Further, the cooling fluid from the nozzle 10 collides with the upper surface of the third mixing / passing member 8 to mix with the fluid containing the vapor passing from below through the mixing / passing member 8 to promote the condensation of the vapor. in this way,
It is also possible to accelerate the condensation of the steam by making the flow-down direction of the steam and the flow-down direction of the cooling fluid from the nozzle 10 substantially opposite to each other.

The cooling fluid supply nozzle 13 attached to the bottom of the atmosphere opening pipe 5 injects the cooling fluid in the same flow direction as the ascending mixed fluid in the atmosphere opening pipe 5, and the cooling fluid in the swirling mixed fluid. To condense the vapor. Further, the cooling fluid from the nozzle 13 is passed through the third mixing passage member 8
Of the vapor in the mixed fluid to accelerate the condensation of the vapor in the mixed fluid.

In this way, the cooling fluid is jetted to both surface sides of the third mixing passage member 8, that is, the cooling fluid is jetted from both the forward direction and the reverse direction with respect to the downward direction of the mixed fluid containing steam. By doing so, the vapor can be condensed more reliably. In this case, the efficiency of vapor condensation can be increased by making the injection amount of the cooling fluid in the forward direction larger than the injection amount of the cooling fluid in the reverse direction.

The cooling fluid supply nozzles 12 and 14 attached to the bottom of the heat exchange container 1 mainly generate jets inclined toward the center of the heat exchange container 1 and have passed through the first mixing passage member 6. The cooling fluid having the opposite flow direction is injected to a part of the mixed fluid, and the cooling fluid is injected to the second mixing / passing member 7 to promote the condensation of the vapor.

Each cooling fluid supply nozzle 9, 10,
11,12,13,14 are the mounting angle and the vertical position,
Alternatively, it is preferable to attach the cooling fluid so that the injection amount and the injection shape of the cooling fluid can be adjusted as appropriate in order to accelerate the condensation of the vapor. In particular, the cooling fluid supply nozzle 9 above the steam supply port 2
It is preferable to supply a large amount of cooling fluid.

The mixed fluid of the steam, the non-condensable gas such as air, and the drain supplied from the steam supply port 2 to the heat exchange container 1 is partially mixed with the cooling fluid supplied from the cooling fluid supply nozzles 9 and 11. While colliding with the first mixing passage member 6, the vapor and the cooling fluid are mixed and the vapor is condensed. The drainage of the cooling fluid and the vapor that has passed through the mixing passage member 6 is accumulated at the bottom and discharged to the outside through the liquid discharge pipe 4, and the vapor and the non-condensed gas remaining without being condensed are the second mixing passage member 7 To the gas-liquid separating member 15.

Since the cooling fluid is sprayed from the cooling fluid supply nozzles 12 and 14 to the second mixing / passing member 7, the steam remaining uncondensed and the cooling fluid collide with each other and are mixed, and Condensation is promoted.

The cooling fluid, the drain, the non-condensable gas, and the remaining vapor that have passed through the second mixing / passing member 7 collide with the collision plate 15 to form a swirling flow, and a large-mass droplet is dropped downward. The liquid is separated, and the separated liquid is discharged from the bottom of the atmosphere open pipe 5 through the liquid discharge pipe 3 to the outside. Even when the collision plate 15 collides, the vapor and the cooling fluid are mixed with each other and a part of the vapor is condensed.

The gas-liquid mixed fluid which has not been completely separated by the collision plate 15 collides with the separation plate 21 again to promote the mixing of the vapor and the cooling fluid and promote the separation of the gas and liquid, and the collision plate 15 The swirling flow is weakened due to the collision with.

On the other hand, the separated gas, that is, the non-condensed gas and the remaining vapor, ascend in the atmosphere open pipe 5 and pass through the third mixing passage member 8, while the cooling fluid supply nozzle 1
The vapor is condensed in admixture with the cooling fluid from 3 or 10.

The gas-liquid separation member 1 is moved up in the atmosphere open pipe 5
In the mixed fluid of the non-condensable gas that has flowed into the inside 6 and a slight amount of the remaining vapor, the slight amount of the vapor is condensed and captured while passing through the mesh member 26, and only the non-condensed gas that remains at the end is the outlet opening. It is discharged to the outside through 28.

As described above, only the non-condensable gas such as air is discharged to the outside by the mixing passage members 6, 7, 8 and the gas-liquid separating members 15, 16 as in the case where the vapor is contained. In addition, the steam and steam do not enter the surrounding area.

In this embodiment, an example in which the respective cooling fluid supply nozzles 9, 10, 11, 12, 13, 14 are used is shown. However, the number of nozzles to be used or the number of nozzles to be used according to the amount of inflowing steam, or It is preferable to select the injection amount of the cooling fluid.

[0036]

EFFECTS OF THE INVENTION According to the present invention, by providing the mixing / passing member for vapor and cooling fluid and the gas-liquid separating member, the vapor and cooling fluid are mixed to surely condense the vapor, and It is possible to separate the liquid and discharge only the non-condensable gas such as air as a gas to the outside.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a heat exchanger of the present invention.

2 is an enlarged cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

1 Heat Exchange Container 2 Steam Supply Port 5 Atmosphere Opening Pipe 6 First Mixing Passing Member 7 Second Mixing Passing Member 8 Third Mixing Passing Member 9, 10, 11, 12, 13, 13 Cooling Fluid Supply Nozzle 15 Gas Liquid separation member 16 Second gas-liquid separation member 17 Through hole 18 Cooling fluid supply pipe 21 Separation plate 23 Swirling flow prevention plate 24 Inner pipe 25 Outer pipe 26 Mesh member 28 Outlet opening

Claims (2)

[Claims] 1. A method in which steam and a cooling fluid are supplied to a heat exchange container provided with an atmosphere opening portion and the steam is condensed by exchanging heat with the cooling fluid, wherein the steam and the cooling fluid are mixed in the heat exchange container. And a gas-liquid separating member for separating a fluid into a gas and a liquid. 2. The heat exchanger according to claim 1, wherein a plurality of mixing passage members and a plurality of gas-liquid separating members are arranged alternately.