JP2010117106A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger not negatively affecting a surrounding environment by preventing the smoke-like rising of re-evaporated steam from a discharge drain. <P>SOLUTION: A coiled cooling fluid pipe 3 is disposed inside of a heat exchanging case 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 a warm water discharge pipe 8 at its upper end. The cooling fluid supply pipe 7 is branched and connected with an ejector 5. A gas discharging means 14 is communicated with a suction opening 12 of the ejector 5. Only the air stagnating at the upper section of the heat exchanging case 1 is sucked to the suction port 12 of the ejector 5 through the gas discharging means 14 and discharged to the external. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention eliminates the steam that can be trapped with moyamoya by condensing the steam remaining in the various steam using devices and the re-evaporated steam generated from the 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 heat exchange of a cooling fluid.

In the 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 steam 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.

The conventional heat exchanger has a problem that only the air staying in the heat exchange container cannot be efficiently removed to the outside. In the presence of air, the heat exchange between the steam and the cooling fluid is significantly impeded.
JP 2004-53029 A

  The problem to be solved is to obtain a heat exchanger that can efficiently exclude only the air staying in the heat exchange vessel to the outside.

  In the present invention, steam and a cooling fluid are supplied to a heat exchange container, and the steam is condensed by exchanging heat with the cooling fluid. It connects with the part and communicates with the upper part in a heat exchange container via the gas discharge | emission means which discharge | emits the gas mixed in the fluid to an exit part in the suction port of the said ejector.

  In the present invention, the nozzle part of the ejector is connected to the cooling fluid pipe, and the suction port of the ejector is connected to the upper part of the heat exchange container via the gas discharge means. Only the staying air is sucked into the suction port of the ejector through the gas discharging means and removed to the outside.

  As the ejector, a conventionally used ejector can be used, and an ejector including a nozzle, a suction chamber provided with a suction port, and a diffuser section can be used.

  In FIG. 1, a heat exchange container 1, a steam supply pipe 2 for supplying steam to be condensed, a cooling fluid pipe 3 disposed in the heat exchange container 1, and a part of the cooling fluid pipe 3 are branched to form a nozzle section. 4 and the gas discharge means 14 interposed between the suction port 12 of the ejector 5 and the upper part 13 of the heat exchange container 1 constitute a heat exchanger.

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. Connect with. The cooling fluid supplied from the cooling fluid supply pipe 7 flows down to the discharge pipe 8 through the cooling fluid pipe 3. The cooling fluid fluid is supplied from the branch cooling pipe 15 branched from the cooling fluid supply pipe 7 to the ejector 5 and flows down from the outlet pipe 16 of the ejector 5 into the atmosphere opening pipe 6.

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. A pipe line 17 is connected to the lower end of the drain discharge portion 9 to communicate with a drain discharge location (not shown).

  The ejector 5 connected to the branch cooling pipe 15 is composed of a nozzle portion 4 containing a nozzle (not shown), a suction port 12, and a diffuser 18. In the ejector 5, a cooling fluid such as cooling water passes through the ejector 5 to generate a suction force at the suction port 12, and sucks the air remaining in the upper portion of the heat exchange container 1 through the pipe line 19.

The gas discharge means 14 is attached in the middle of the pipe line 19. The gas discharge means 14 can be equipped with an automatic air vent valve conventionally used, or a manual valve that can exclude gas by manually opening and closing the valve. This gas discharge means 14 can discharge the air mixed in the fluid flowing down in the pipe line 19 to the outside 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 drain in the drain reservoir 10 rises in the atmosphere open pipe 6 by the pressure of the supplied steam, and is discharged from the upper end 11 of the overflow pipe 9 through the pipe line 17 to a predetermined location.

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 Nozzle part 5 Ejector 6 Atmospheric release pipe 7 Cooling fluid supply pipe 8 Hot water discharge pipe 9 Overflow pipe 12 Suction port 14 Gas discharge means 19 Pipe line

Claims (1)

When supplying steam and cooling fluid to the heat exchange container and condensing the steam by heat exchange with the cooling fluid, a part of the cooling fluid pipe for supplying the cooling fluid is branched and connected to the nozzle part of the ejector. A heat exchanger characterized in that the suction port of the ejector is in communication with the upper part in the heat exchange container via a gas discharge means for discharging the gas mixed in the fluid to the outlet.

Images