JP2002054890A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger which does not discharge steam to outside, by efficiently condensing the steam. SOLUTION: A coil-form cooling fluid pipe 5 is attached within a heat exchanger 1 to which a steam supply pipe 2 is connected. A plate-shaped heat pipe member 6 is arranged, with its center 7 in contact with the lower periphery of the cooling fluid pipe 5. The steam which is not condensed completely at only the outside surface of the cooling fluid pipe 5 is condensed and becomes a drain, being heat-exchanged with the heat pipe member 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of condensing steam remaining in a steam-using device or reevaporated steam generated from a high-temperature drain by exchanging heat with a cooling fluid such as water. The present invention relates to a device that eliminates steam that can accumulate with a moyamoya gas or uses hot water whose temperature has been increased by exchanging heat with a cooling fluid to separately use the retained heat of the steam.

[0002]

2. Description of the Related Art A conventional heat exchanger of this type is disclosed, for example, in JP-A-60-120186. This is achieved by installing a cooling pipe inside a heat recovery chamber having a steam supply port, connecting the air release section to this heat recovery chamber, and storing condensate in the air release section and the lower part of the heat recovery chamber.
It is possible to prevent non-condensable gas, for example, air, from flowing into the heat recovery chamber and efficiently exchange heat.

[0003]

In the above-mentioned conventional heat exchanger, the heat exchange efficiency is limited, so that the steam cannot be surely condensed. There were times when we got stuck and became an environmental problem.
This is because the amount of steam supplied to the heat exchanger is not always constant and fluctuates in many cases. When a large amount of steam flows into the heat exchanger, all the steam cannot be condensed.

Accordingly, an object of the present invention is to provide a heat exchanger that efficiently exchanges heat even when a large amount of steam flows in and does not discharge steam to the outside.

[0005]

Means taken to solve the above problem is to supply steam and a cooling fluid to a heat exchange container and condense the steam by exchanging heat with the cooling fluid. Attach a cooling fluid pipe through which the cooling fluid passes inside the heat exchange container, and around the cooling fluid pipe,
It is provided with a heat pipe member that absorbs heat held by steam and radiates heat to a cooling fluid.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Steam in a heat exchange vessel contacts the outer surface of a cooling fluid pipe and exchanges heat to condense. By providing a heat pipe member around the cooling fluid pipe that absorbs heat held by the steam and radiates heat to the cooling fluid, even when an amount of steam that cannot be exchanged by the cooling fluid pipe alone flows in, The heat pipe member can efficiently exchange heat and condense the steam, and does not discharge the steam to the outside.

[0007]

In FIG. 1, a heat exchange vessel 1, a steam supply pipe 2 for supplying steam to be condensed, a cooling fluid pipe 5 arranged in the heat exchange vessel 1, and a cooling fluid pipe 5 are attached. A heat exchanger is constituted by the heat pipe member 6, the overflow pipe 3 for discharging the condensed drain of steam, and the open-to-atmosphere pipe 4 provided at the center of the heat exchange vessel 1 as an open-to-atmosphere section.

In the heat exchange vessel 1, on the outer periphery of the open-to-atmosphere pipe 4,
A cooling fluid pipe 5 in which a long copper pipe is formed in a coil shape is arranged, and a lower inlet side of the cooling fluid pipe 5 is connected to a cooling fluid supply pipe 8.
And the upper outlet side is connected to the hot water discharge pipe 9. The steam supplied to the heat exchange vessel 1 comes into contact with the outer surface of the cooling fluid pipe 5 and condenses.

The overflow pipe 3 is a vertical straight line, and the upper end 11 is opened in the open pipe 4 and the lower end 12 is connected to the heat exchange vessel 1.
Open to the outside atmosphere. The drain in which the vapor is condensed is discharged from the bottom of the heat exchange vessel 1 to the outside through the overflow pipe 3.

A heat pipe member 6 is attached around the lower part of the cooling fluid pipe 5. As the heat pipe member 6, a so-called loop-type thin tube heat pipe is suitable. The loop-type thin tube heat pipe 6 contains a working fluid for heat transport in a loop-shaped thin tube, and uses a part of the loop-type thin tube as a heat absorbing portion and uses a portion other than the heat absorbing portion as a heat radiating portion. Therefore, it has a thin flat plate shape and excellent heat transfer capability.

The loop-type thin tube heat pipe 6 is a coil-shaped flat plate similar to the cooling fluid pipe 5, the central portion 7 is arranged in contact with a part of the outer surface of the cooling fluid pipe 5, and both end portions 13, 1.
4 is placed in the heat exchange vessel 1. The central portion 7 is a heat radiating portion that radiates heat to the cooling fluid via the cooling fluid pipe 5, and both end portions 13 and 14 other than the central portion 7 are heat absorbing portions that absorb heat from steam. The inside of the loop type thin tube heat pipe 6 is not shown, but a number of thin tubes are formed in a loop and in parallel to form a single continuous thin tube, and the working liquid is sealed in a vacuum state inside. It is.

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 to the heat exchange vessel 1 for condensation. The steam supplied from the steam supply pipe 2 into the heat exchange vessel 1 is cooled by the cooling fluid pipe 5 and condensed to be drained and dropped on the bottom of the heat exchange vessel 1.

The heat of the steam that cannot be cooled by the cooling fluid pipe 5 is absorbed by the heat absorbing portions 13 and 14 of the loop-type thin tube heat pipe 6 at both end portions 13 and 14, and is condensed to form a drain. The heat absorbed by the heat absorbing portions 13 and 14 moves through the loop-type thin tube heat pipe 6 and moves to the central portion 7 serving as a heat radiating portion.
From the cooling fluid in the cooling fluid pipe 5.

The drain condensed in the loop-type thin tube heat pipe 6 also drops downward and accumulates in the lower part of the heat exchange vessel 1. The accumulated drain rises in the open-to-atmosphere pipe 4 due to the pressure of the supplied steam, and is discharged from the upper end 11 of the overflow pipe 3 to the outside.

[0015]

According to the present invention, a heat pipe member is provided around the cooling fluid pipe to absorb the heat of the steam and radiate the heat to the cooling fluid. Even when a large amount of steam flows in, the heat pipe member can efficiently exchange heat and condense the steam, and a heat exchanger that does not discharge steam to the outside can be obtained.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchange container 2 Steam supply pipe 3 Overflow pipe 4 Open air pipe 5 Cooling fluid pipe 6 Heat pipe member 7 Heat radiating part 8 Cooling fluid supply pipe 9 Hot water recovery pipe 13, 14 Heat absorbing part

Claims (1)

[Claims] 1. A method for supplying steam and a cooling fluid to a heat exchange vessel and condensing the steam by exchanging heat with the cooling fluid, wherein a cooling fluid pipe through which the cooling fluid passes is provided inside the heat exchange vessel. A heat pipe member around the cooling fluid pipe, the heat pipe member absorbing heat held by the steam and releasing the heat to the cooling fluid.