JP3790005B2 - Heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention eliminates the steam that can be trapped in the moyamoya by condensing the remaining steam used in various steam-using devices or re-evaporated steam generated from high-temperature drain by heat exchange with a cooling fluid such as water. Alternatively, the present invention relates to one that effectively uses the retained heat of steam by separately using a heat exchanged cooling fluid.
[0002]
[Prior art]
A conventional heat exchanger of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 60-120186. This is because a cooling pipe is installed in a heat recovery chamber having a steam supply port, an atmosphere opening portion is communicated with the heat recovery chamber, and condensate is stored in the atmosphere opening portion and the lower portion of the heat recovery chamber, It is possible to prevent heat from flowing into the heat recovery chamber and efficiently exchange heat.
[0003]
[Problems to be solved by the invention]
The conventional heat exchanger has a problem that a large amount of cooling water is required to completely condense the steam. In other words, since the supplied steam only exchanges heat with the cooling pipe in the heat recovery chamber, when it is necessary to completely condense a large amount of steam, such as when it is desired to eliminate the state of confusion with the steam. A large amount of cooling water is required.
[0004]
Therefore, the technical problem of the present invention is to obtain a heat exchanger capable of reliably condensing steam without requiring a large amount of cooling fluid.
[0005]
[Means for Solving the Problems]
Means taken in order to solve the above-mentioned problem is to supply steam and a cooling fluid to a heat exchange vessel and to condense the steam by exchanging the heat with the cooling fluid, and in the cooling fluid supply pipe, an ejector And the suction part of the ejector is opened upward in the heat exchange container, and the indirect heat exchange part is connected to the outlet side of the ejector in the heat exchange container.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
By supplying a cooling fluid to the ejector, a suction force is generated at the suction portion, and a part of the steam supplied into the heat exchange container is sucked. Further, the sucked steam is mixed with the cooling fluid in the ejector and supplied to the indirect heat exchanging section connected to the outlet side, and the in-heat exchanging section further condenses the steam in the heat exchange container. Therefore, compared with a conventional heat exchanger that only performs heat exchange in the cooling pipe, condensation of the vapor proceeds at a rate that is sucked by the ejector, and the vapor can be reliably condensed with less cooling fluid.
[0007]
【Example】
In FIG. 1, a heat exchange container 1, a steam supply pipe 2 for supplying steam to be condensed, a cooling fluid supply pipe 3, an ejector 4 connected to the cooling fluid supply pipe 3 and disposed in the heat exchange container 1, and A heat exchanger is configured with the indirect heat exchange unit 5 provided continuously on the outlet side of the ejector 4.
[0008]
The cooling fluid supply pipe 3 is connected to a cooling fluid source such as cooling water (not shown) and is connected to the nozzle portion 7 of the ejector 4 via the valve 6. Inside the nozzle part 7, a throttle part is built and a suction port 8 as a suction part is provided. The upper end of the suction port 8 is opened to communicate with the heat exchange container 1. A diffuser unit 9 is provided on the right side of the nozzle unit 7, and an indirect heat exchange unit 5 is arranged in a coil shape on the lower right side of the diffuser unit 9. The indirect heat exchanging section 5 is arranged so as to reach the entire inside of the heat exchanging vessel 1 using a material having high thermal conductivity such as a copper pipe, and the lower portion thereof is connected to the cooling fluid discharge pipe 11 via the valve 10. To do. The cooling fluid discharge pipe 11 guides the cooling fluid whose temperature has been increased by exchanging heat with the steam in the heat exchange container 1 by the ejector 4 and the indirect heat exchanging section 5 to a separate use location.
[0009]
An air release pipe 13 is attached to the upper part of the heat exchange vessel 1 through a valve 12. By opening the valve 12, the heat exchange vessel 1 communicates with the atmosphere, and can be shut off by closing the valve. A gas vent valve 16 is attached via the valve 15. The degassing valve 16 automatically removes non-condensable gas such as air accumulated in the heat exchange vessel 1 to the outside. Although not shown, the degassing valve 16 uses a thermal element such as bimetal or thermo wax to When the temperature is lower than a predetermined temperature, for example, 80 degrees C or lower, the valve is opened to exclude gas, and when the temperature is higher than the predetermined temperature, the valve is closed to prevent vapor from leaking to the outside.
[0010]
The steam supply pipe 2 is connected to an outlet side of a steam using apparatus (not shown), a re-evaporation tank or the like, and supplies steam into the heat exchange container 1 for condensation. Therefore, steam stays in the heat exchange vessel 1 for condensation supplied from the steam supply pipe 2. A pipe 17 for supplying condensed steam to a predetermined location is connected to the lower end of the heat exchange vessel 1.
[0011]
The cooling fluid supplied from the cooling water supply pipe 3 is squeezed by the nozzle portion 7 of the ejector 4 to increase the flow velocity, generate a suction force, and suck and mix a part of the steam from the suction port 8 to mix the indirect heat exchange portion. 5 is supplied. In order to condense, the steam staying above in the heat exchange vessel 1 is sucked into the ejector 4 and mixed with the cooling fluid to condense. Further, the steam staying in the upper part and the lower part in the heat exchange vessel 1 is condensed by the indirect heat exchange unit 5 to be condensed. The condensed vapor becomes a liquid drain and reaches a predetermined location from the lower end pipe 17.
[0012]
A part of the steam in the heat exchange vessel 1 is sucked and mixed by the ejector 4, so that the condensation of the steam can be accelerated, and the convection of the steam in the heat exchange vessel 1 is promoted to further improve the steam efficiency. Can be condensed.
[0013]
In the present embodiment, an example in which one ejector 4 is arranged in the heat exchange container 1 is shown, but the number of ejectors is two or more according to the size of the heat exchange container 1 and the supply amount of steam. However, it can be appropriately arranged.
[0014]
【The invention's effect】
According to the present invention, the ejector is connected to the cooling fluid supply pipe, the suction part of the ejector is opened in the heat exchange container, and the indirect heat exchange part is continuously provided on the outlet side of the ejector. The steam can be sucked to accelerate the condensation of the steam, and the steam can be reliably condensed with less cooling fluid.
[0015]
In addition, the steam is sucked into the suction part of the ejector, so that the convection of the steam in the heat exchange vessel is promoted, the heat exchange efficiency with the indirect heat exchange part is improved, and the steam can be more reliably condensed. it can.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a heat exchanger according to the present invention.
[Explanation of symbols]
1 Heat Exchange Container 2 Steam Supply Pipe 3 Cooling Fluid Supply Pipe 4 Ejector 8 Suction Port 11 Cooling Fluid Discharge Pipe 16 Degassing Valve

Claims (1)

Supplying steam and cooling fluid to a heat exchange container and condensing the steam by heat exchange of the steam with the cooling fluid. A heat exchanger characterized in that an indirect heat exchanging portion is continuously provided on the outlet side of the ejector in the heat exchange vessel while opening upward in the inside.

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