JP2010216695A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a heat exchanger capable of securely carrying out heat exchange between steam and cooling fluid. <P>SOLUTION: A steam supply pipe 2 and a cooling fluid supply pipe 3 are respectively connected to a heat exchanging container 1. A vacuum pump means 4 is arranged below the heat exchanging container 1 and connected to a condensate discharge pipe 7, and it is connected to an upper part of the heat exchanging container 1 via a communication pipe 8. The vacuum pump means 4 is formed using a circulation pump 11, an ejector 5, a cooling water tank 12, and a circulation passage 13. Inside of the heat exchanging container 1 is also sucked by suction force generated by a vacuum pump means 4 and made to be a decompression state not more than the atmospheric pressure, which can make a lot of steam flow from a steam generation source into the heat exchanging container 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

 In the present invention, the remaining steam used in various steam-using devices and the re-evaporated steam generated from the high-temperature condensate in which the steam is condensed are exchanged by heat exchange with a cooling fluid such as water to condense with moyamoya. The present invention relates to a heat exchanger that can effectively use the retained heat of steam by eliminating steam or separately using hot water whose temperature has been increased by heat exchange between a cooling fluid and steam.

A conventional heat exchanger is provided with a filter part in the atmosphere opening part and a second cooling fluid supply part arranged on the outlet side of the filter part, and non-condensable gas such as air in steam to be heat exchanged. Even if water is mixed in, the steam that rises to the outside will not be discharged by trapping and cooling the steam and condensate in the filter section.

In the above conventional heat exchanger, when the pressure difference between the steam source and the heat exchange vessel is small, or when there is almost no pressure difference, almost no steam can flow into the heat exchange vessel. There is a problem in that heat exchange between the steam and the cooling fluid cannot be performed reliably in the heat exchange container.

JP-A-11-37668

  The problem to be solved is to ensure heat exchange between the steam and the cooling fluid by allowing more steam from the steam generation source to flow into the heat exchange vessel.

 In the present invention, steam and cooling fluid are supplied to a heat exchange container provided with an atmosphere opening part, and the steam is condensed by exchanging heat with the cooling fluid. The inside of the heat exchange container includes a circulation pump and an ejector. It is connected to a vacuum pump means comprising a cooling water tank.

  According to the present invention, the inside of the heat exchange container is connected to the vacuum pump means including the circulation pump, the ejector, and the cooling water tank, so that the inside of the heat exchange container is sucked by the suction force generated by the vacuum pump means. The pressure can be reduced to below atmospheric pressure, and there is an advantage that the pressure difference between the steam generation source and the heat exchange vessel can be sufficiently secured, and the heat exchange between the steam and the cooling fluid can be performed reliably. .

It is a block diagram which shows the Example of the heat exchanger which concerns on this invention.

In the present invention, the inside of the heat exchange vessel is connected to the vacuum pump means, but water can be used as a driving fluid for driving the vacuum pump means.

  In FIG. 1, a cylindrical heat exchange container 1, a steam supply pipe 2 for supplying steam from a steam source to the heat exchange container 1, a cooling fluid supply pipe 3 for supplying a cooling fluid to the heat exchange container 1, and heat exchange The vacuum pump means 4 connected to the container 1 constitutes a heat exchanger.

The left end of the steam supply pipe 2 is connected to a steam using device (not shown). An air release pipe 6 serving as an air release part is attached to the upper central part of the heat exchange vessel 1, and a condensate condensed with steam flows down to the vacuum pump means 4 at the lower central part of the heat exchange vessel 1. A water discharge pipe 7 is attached. Although the internal structure of the heat exchange vessel 1 is not shown, it is the same as a conventional heat exchange vessel.

The upper end of the heat exchange vessel 1 is connected to the ejector 5 of the vacuum pump means 4 through the communication pipe 8. A cooling fluid supply pipe 3 that supplies cooling water as a cooling fluid is connected to the lower part of the right side surface of the heat exchange container 1. The cooling fluid supply pipe 3 arranges the inside of the heat exchange container 1 in a coil shape, and connects the upper end with the cooling fluid discharge pipe 10. The cooling fluid supply pipe 3 is branched and a makeup water pipe 17 is connected.

The condensate discharge pipe 7 at the lower end of the heat exchange container 1 is connected to the suction chamber 9 of the ejector 5 of the vacuum pump means 4. The vacuum pump means 4 is formed by a circulation pump 11, an ejector 5, a cooling water tank 12, and a circulation path 13 that communicates these.

 The vacuum pump means 4 generates a suction force in the suction chamber 9 of the ejector 5 when the circulating pump 11 sucks the water in the cooling water tank 12 and discharges it to the ejector 5.

A suction force is generated in the suction chamber 9, and a part of the internal fluid of the heat exchange container 1 is also sucked, so that the inside of the heat exchange container 1 is in a reduced pressure state below atmospheric pressure, and the steam from the steam supply pipe 2 Most of the water flows into the heat exchange vessel 1 and exchanges heat with the cooling fluid, so that condensate is reliably obtained.

  It can be applied as a steam recovery device for various steam-using equipment that uses steam as a heat source.

DESCRIPTION OF SYMBOLS 1 Heat exchange container 2 Steam supply pipe 3 Cooling fluid supply pipe 4 Vacuum pump means 5 Ejector 6 A feeling of openness to the atmosphere 7 Condensate discharge pipe 9 Suction chamber 11 Circulation pump 12 Cooling water tank 13 Circulation path

Claims (1)

  Steam and cooling fluid are supplied to a heat exchange vessel provided with an atmosphere opening, and the vapor is condensed by exchanging heat with the cooling fluid. The inside of the heat exchange vessel is separated from the circulation pump, ejector, and cooling water tank. A heat exchanger characterized by being connected to a vacuum pump means.