JP2007303785A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger capable of preventing smoke-like rising of re-evaporated steam from a discharge drain to prevent circumferential environment from being affected thereby. <P>SOLUTION: A coiled cooling fluid pipe 3 is disposed inside of a heat exchange container 1 connected with a steam supply pipe 2. The cooling fluid pipe 3 is connected with a cooling fluid supply pipe 7 at its lower end and connected with a hot water discharge pipe 8 at its upper end. A drain discharge portion 9 is formed at a lower end of the heat exchange case 1. A second heat exchange case 5 is connected with a lower end of the drain discharge portion 9. As the drain discharged from the drain discharge portion 9 further exchanges heat in the second heat exchange case 5 to be cooled, it is not re-evaporated, thereby its smoke-like rising is not found. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention eliminates the steam that can be trapped with moyamoya by condensing the remaining steam used in various steam-using devices and re-evaporated steam generated from high-temperature drain by heat exchange with a cooling fluid such as water. Alternatively, the present invention relates to an apparatus that effectively uses the retained heat of steam by separately using hot water whose temperature has been increased by exchanging heat with a cooling fluid.

In a conventional heat exchanger, an ejector is attached to a cooling fluid pipe for supplying a cooling fluid to the heat exchange container, and the suction port of the ejector is communicated with a vapor staying place in the heat exchange container. By sucking the staying steam inside, the convection of steam inside the heat exchange vessel is promoted, and the heat transfer coefficient can be improved.

In the conventional heat exchanger described above, since the drain having a relatively high temperature is discharged from the drain discharge portion for discharging the drain condensed steam in the heat exchange container to the outside, the re-evaporated steam is moyamoya from the discharged drain. There was a problem that had an adverse effect on the surrounding environment by rising.
JP 2004-53029 A

  The problem to be solved is to obtain a heat exchanger that prevents re-evaporated vapor from rising from the exhausted drain and does not adversely affect the surrounding environment.

  The present invention supplies steam and a cooling fluid to a heat exchange vessel and condenses the vapor by exchanging heat with the cooling fluid. In the drain discharge portion for discharging the drain condensed steam in the heat exchange vessel to the outside. The second heat exchange vessel is continuously provided, and the gas exclusion means for excluding the gas mixed in the fluid to the outside is attached to the outlet side of the second heat exchange vessel.

  In the present invention, the second heat exchange vessel is connected to the drain discharge portion, so that the drain discharged from the drain discharge portion can be cooled by exchanging heat in the second heat exchange vessel. It is possible to eliminate re-evaporated vapor rising from the drainage drain.

  In the present invention, the second heat exchange vessel is connected in series. However, the second heat exchange vessel may be in direct contact with the drainage to exchange heat or indirectly in contact with the drainage drain. Thus, heat exchange can also be used.

  In FIG. 1, a heat exchange container 1, a steam supply pipe 2 that supplies steam to be condensed, a cooling fluid pipe 3 disposed in the heat exchange container 1, and a drain discharge portion 9 provided in the lower part of the heat exchange container 1. And the heat exchanger is comprised with the 2nd heat exchange container 5 provided in a row by the drain discharge part 9. FIG.

At the center of the heat exchange vessel 1 is provided a cylindrical pipe-shaped air release pipe 6 that is open at the upper and lower ends. A cooling fluid pipe 3 in which a copper long pipe is formed in a coil shape is arranged on the outer periphery of the atmosphere opening pipe 6, a cooling fluid supply pipe 7 is connected to the lower end of the cooling fluid pipe 3, and the upper end is a hot water discharge pipe 8. Connect with. The cooling fluid supplied from the cooling fluid supply pipe 7 passes through the cooling fluid pipe 3 to the discharge pipe 8.

An overflow pipe 9 is disposed below the atmosphere opening pipe 6. The overflow pipe 9 has a vertical straight line shape and opens at the upper end 11 into the atmosphere opening pipe 6. In this embodiment, the overflow pipe 9 constitutes a drain discharge part. The lower end of the drain discharge part 9 is connected to the second heat exchange container 5.

  The second heat exchange vessel 5 is constituted by a cylindrical tank, and the coil-like second cooling fluid pipe 12 is disposed therein, and the cooling fluid supply pipe 7 is connected to the upper end of the cooling fluid pipe 12, and The lower end of the cooling fluid pipe 12 is connected to the discharge pipe 13.

A drain discharge pipe 4 for discharging the heat-exchanged drain to the outside of the system is connected to the lower end portion of the second heat exchange container 5. A gas exclusion means 14 is attached to the drain discharge pipe 4. The gas evacuation means 14 can be equipped with an automatic air vent valve conventionally used or a manual valve that can evacuate gas by manually opening and closing the valve. This gas exclusion means 14 can exclude the air mixed in the fluid flowing down in the drain discharge pipe 4 out of the system.

  The steam supply pipe 2 is connected to an outlet side of a steam using device (not shown), a re-evaporation tank or the like, and supplies steam into the heat exchange container 1 for condensation. The steam supplied from the steam supply pipe 2 into the heat exchange container 1 is cooled by the cooling fluid pipe 3, condensed and drained into the drain reservoir 10 at the bottom.

  The cooling fluid whose temperature has been increased by removing heat from the drain and steam in the cooling fluid pipe 3 is recovered from the discharge pipe 8 to a predetermined drain recovery location. On the other hand, the drain in the drain reservoir 10 rises in the atmosphere open pipe 6 due to the pressure of the supplied steam, and flows down from the upper end of the drain discharge part 9 into the second heat exchange vessel 5. As the drain is cooled by exchanging heat in the second heat exchange vessel 5, the re-evaporated vapor that has become moy with the re-evaporation of the drain discharged from the drain discharge pipe 4 does not rise to the surrounding environment.

The block diagram which shows the Example of the heat exchanger of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchange container 2 Steam supply pipe 3 Cooling fluid pipe 4 Drain discharge pipe 5 2nd heat exchange container 6 Atmospheric release pipe 7 Cooling fluid supply pipe 8 Hot water discharge pipe 9 Drain discharge part 12 2nd cooling fluid pipe 13 Discharge pipe 14 Gas exclusion means

Claims (1)

Supplying steam and cooling fluid to the heat exchange container, and condensing the steam by heat exchange with the cooling fluid, the drain discharge section for discharging the drain condensed steam in the heat exchange container to the second, A heat exchanger in which a heat exchanging vessel is continuously provided, and gas exclusion means for excluding gas mixed in the fluid to the outside is attached to the outlet side of the second heat exchanging vessel.

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