JPH10253272A - Spiral type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spiral type heat exchanger, enabling the easy installation work and the like of a heat exchange by simplifying the structure of piping and capable of applying a constitution, forming four pieces of flow passages in spiral, on a small sized heat exchanger. SOLUTION: In a spiral type heat exchanger, forming four pieces of flow passages A1, A2, B1, B2 in spiral by bulkheads 2a, 2b, 2c, 2d, and conducting high-temperature fluid and low-temperature fluid through four flow passages alternately, the flow passages, passing the high-temperature fluid, and the flow passages, passing the low-temperature fluid, are communicated mutually at the inner peripheral ends of the flow passages in the heat exchanger main body and the outer peripheral end of the same respectively to constitute the inlet and outlet ports 61, (62) 71, T2 of the high-temperature fluid and the low- temperature fluid by one set of connecting unit respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral heat exchanger, and more particularly to a spiral heat exchanger capable of efficiently performing heat exchange between a large flow rate of a high-temperature fluid and a low-temperature fluid. is there.

[0002]

2. Description of the Related Art Conventionally, as a heat exchanger capable of efficiently performing heat exchange between a high-temperature fluid and a low-temperature fluid, it has been most efficient to utilize the temperature difference between the high-temperature fluid and the low-temperature fluid most efficiently. Fully countercurrent spiral heat exchangers are widely used.

[0003] In order to enable efficient heat exchange between a high-temperature fluid and a low-temperature fluid having a large flow rate in the complete counter-current spiral heat exchanger,
Partition walls 2a and 2 made of a metal plate as shown in FIGS.
b, 2c, 2d, four flow paths A1, A2, B1, B
2 are formed in a spiral shape, and these four flow paths A1, A
2, a spiral type in which a high-temperature fluid and a low-temperature fluid are circulated every other one in B1 and B2 (for example, a high-temperature fluid is circulated in channels A1 and A2 and a low-temperature fluid is circulated in channels B1 and B2, respectively). Heat exchangers have been put into practical use.

In the spiral heat exchanger E,
The connection portions PA1, PA2, PB1, PB2 of the fluid inlet / outlet formed on the outer peripheral end of the flow paths A1, A2, B1, B2 correspond to the flow paths A1, A2, B1, B2, respectively. And the connecting portions PA1 and PA2 are connected to the collective pipe PC by connecting the connecting portions P1 and P2.
B1 and the connection part PB2 were configured to be connected to the collective pipe PD.

[0005]

However, in the conventional spiral heat exchanger E, the connecting portions PA1, PA2, PB1, PB2 and the collective piping PC, PD are complicatedly formed on the outer peripheral surface of the heat exchanger body. It becomes complicated and protrudes greatly, which not only hinders the installation work of the heat exchanger in a narrow place, but also increases the equipment cost and construction cost of piping including heat insulation equipment for piping. Had. Further, in this heat exchanger E, the connecting portion P
Since A1, PA2, PB1, and PB2 are formed so as to be sequentially shifted on the outer peripheral surface of the heat exchanger main body, the size of an applicable heat exchanger is limited. It is difficult to apply a configuration in which the two flow paths A1, A2, B1, and B2 are formed in a spiral shape.

The present invention has been made in view of the above-mentioned problems of the conventional spiral heat exchanger, and has been made so as to simplify the piping structure for the spiral heat exchanger and facilitate installation work of the heat exchanger. In addition, a first object is to provide a spiral heat exchanger to which a configuration in which four flow paths are formed in a spiral shape can be applied to a small heat exchanger.

[0007] It is a second object of the present invention to provide a spiral heat exchanger capable of uniformly flowing a large flow rate of fluid through four flow paths.

[0008]

In order to achieve the first object, the spiral heat exchanger according to the first aspect of the present invention has four partitions formed in a spiral shape by partition walls. In a spiral heat exchanger in which a high-temperature fluid and a low-temperature fluid are circulated every other one, a flow path for circulating a high-temperature fluid and a flow path for circulating a low-temperature fluid are separated by a flow path in the heat exchanger body. Are characterized in that they communicate with each other at an inner peripheral end and an outer peripheral end thereof, and the inlet and outlet of the high-temperature fluid and the low-temperature fluid are each constituted by one connecting portion.

[0009] In this spiral heat exchanger, the inlet and outlet of the high-temperature fluid and the low-temperature fluid are each constituted by four connection parts, one each, so that the piping structure for the heat exchanger can be simplified. it can. This facilitates the installation work of the heat exchanger and the like, and increases the degree of freedom in designing a position for forming a connection portion between the inlet and the outlet of the high-temperature fluid and the low-temperature fluid. Also 4
It is possible to apply a configuration in which one flow path is formed in a spiral shape.

Similarly, in order to achieve the first object,
The spiral heat exchanger according to a second aspect of the present invention is the spiral heat exchanger according to the first aspect, wherein at least one of the fluid inlet / outlet connection portions formed at the outer peripheral end of the flow path is connected to the end face of the heat exchanger body. It is characterized by being formed in.

Thus, the number of connecting portions formed on the outer peripheral surface of the heat exchanger main body can be reduced or eliminated, so that the heat exchanger can be easily installed and the high-temperature fluid and the low-temperature fluid can be easily removed. The degree of freedom in designing the position for forming the connection part of the entrance / exit becomes greater.

Further, in order to achieve the second object, the spiral heat exchanger according to the third aspect of the present invention comprises the first or second spiral heat exchanger.
In the spiral heat exchanger of the present invention, at least one of the fluid inlet / outlet connection portions formed at the outer peripheral end of the flow passage is formed at a substantially intermediate position in the width direction of the flow passage on the outer peripheral surface of the heat exchanger body. It is characterized by.

In this spiral heat exchanger, at least one of the fluid inlet / outlet connection portions formed at the outer peripheral end of the flow path (although not particularly limited, usually, the fluid inlet connection portion) By forming the heat exchanger body at a substantially middle position in the width direction of the flow path on the outer peripheral surface, a large flow rate of fluid can be uniformly distributed through the two flow paths connected to the connection portion.

Similarly, in order to achieve the second object,
The spiral heat exchanger according to the fourth aspect of the present invention includes the first and second spiral heat exchangers.
Alternatively, in the spiral heat exchanger according to the third aspect of the present invention, the connection part of the fluid inlet / outlet formed at the inner peripheral end of the flow path is formed on the end face of the heat exchanger main body, and the fluid flows between the inlet / outlet and the flow path. It is characterized in that it communicates via a second inlet / outlet which is opened substantially uniformly in the width direction of the inner peripheral end of the road.

In the spiral heat exchanger, a connection portion of a fluid inlet / outlet formed at an inner peripheral end of the flow path is formed on an end face of the heat exchanger body, and the inlet / outlet and the flow path are connected to the flow path. By communicating with each other through the second inlet / outlet which is opened substantially uniformly in the width direction of the inner peripheral end of the fluid, a fluid having a large flow rate can be uniformly distributed through the four flow paths.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the spiral heat exchanger of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of a spiral heat exchanger according to the present invention. This spiral heat exchanger E
1 is a partition wall 2a, 2b, 2c, 2d made of a metal plate;
Gaskets 5 at both ends (upper and lower ends in FIG. 2)
The upper end face plate 51 and the lower end face plate 5 abutted via the third and the third 54
2, four channels A1, A2, B1, having rectangular cross sections
B2 is formed in a spiral shape, and the four flow paths A1, A
2, a high-temperature fluid and a low-temperature fluid are circulated every other one in B1 and B2 (although this is not particularly limited, in the present embodiment, the high-temperature fluid and the
A case will be described in which a low-temperature fluid flows through each of B1 and B2. ), And the flow path A through which the high-temperature fluid flows
Channels B1 and B2 for flowing low-temperature fluid between each other and A2
Are connected to each other at the inner peripheral end and the outer peripheral end of the flow path in the heat exchanger main body, and the inlets / outlets 71, 72, 61, and 62 for the high-temperature fluid and the low-temperature fluid are each formed by one connecting portion. To do.

In this case, one inlet / outlet 61 formed in the outer peripheral end of the flow paths B1 and B2 (in this embodiment,
The connection portion of the inlet of the low-temperature fluid is formed at a substantially intermediate position in the width direction of the flow paths B1 and B2 on the outer peripheral surface of the heat exchanger body, and the flow path A
The connecting portion of the other inlet / outlet 72 (the outlet of the high-temperature fluid in this embodiment) formed at the outer peripheral end of the heat exchanger 1, A2 is formed on the lower end face plate 52 of the heat exchanger body. The flow paths B1 and B2 communicate with each other by forming the flow path B2 so as to extend from the flow path A1 at the outer peripheral end, while the flow paths A1 and A2 communicate with each other at the entrance 72. To

The positions at which the connecting portions of the inlets / outlets 61 and 72 formed at the outer peripheral ends of the flow paths A1, A2, B1 and B2 are not limited to the structure of this embodiment.
The connection part of one entrance / exit 61 formed on the outer peripheral end of B2 is
It can also be formed on the upper end face plate 51 or the lower end face plate 52 of the heat exchanger body.

Further, a connection portion of an inlet / outlet 62 (in this embodiment, an outlet for a low-temperature fluid) formed at the inner peripheral end of the flow paths B1 and B2 is formed on the upper end face plate 51 of the heat exchanger body. The connecting portion of the inlet / outlet 71 (in this embodiment, the inlet of the high-temperature fluid) formed at the inner peripheral end of the paths A1 and A2 is formed on the lower end face plate 52 of the heat exchanger body.

In the spiral heat exchanger E1 of this embodiment, the flow paths A1 and A2, the flow paths B1 and B2
In order to communicate with each other at the inner peripheral end,
At the center thereof, an inner cylinder 1 and a vertical partition plate 4 constituting two independent header portions 32, 31 for the flow paths A1, A2 and the flow paths B1, B2 are arranged. In this case, the inner cylinder 1 has a second inlet / outlet which is substantially uniformly opened in the width direction (vertical direction in FIG. 2) of the flow paths A1, A2, B1, and B2 on the peripheral surface thereof at intervals of approximately 90 degrees. 1a, 1b, 1c,
1d, a second inlet / outlet 1 is provided on the outer peripheral surface of the inner cylinder 1.
a, 1b, 1c, 1d so as to be separated from each other.
The inner peripheral ends of a, 2b, 2c and 2d are joined in a watertight manner by welding or the like. In the inner cylinder 1, the length is shorter than the length of the inner cylinder 1 (the length in the vertical direction in FIG. 2), and
The bottomed vertical partition plate 4 having a semicircular cross section is joined to the inner peripheral surface of the inner cylinder 1 in a watertight manner by welding or the like so as to surround the second inlet / outlet 1c, 1d. A header portion 3 formed by partitioning the vicinity of the upper end of the inner cylinder 1 other than the enclosed portion by an inner cylinder 1 and a vertical partition plate 4 on the upper portion.
The horizontal partition plate 5 is formed so as to form the communication portion 33 of
Is closed in a watertight manner by welding or the like, and the second entrance 1
Header section 3 communicating with flow paths B1 and B2 via c and 1d
1 and a header portion 32 communicating with the flow paths A1 and A2 via the second inlets and outlets 1a and 1b.

Thus, the spiral heat exchanger E
1 is an entrance / exit 71, a header section 32, a second entrance / exit 1a, 1
b, a flow path of a high-temperature fluid composed of flow paths A1, A2 and an entrance 72, an entrance 61, flow paths B1, B2, a second entrance 1
It is possible to form a flow path of the low-temperature fluid composed of c, 1d, the header portions 31, 31, the communication portion 33, and the inlet / outlet 62.

FIG. 4 shows a second embodiment of the spiral heat exchanger of the present invention. This spiral heat exchanger E2 is
Independent 2 for channels A1, A2 and channels B1, B2
In order to form the two header portions 32 and 31, instead of the inner cylinder 1 and the vertical partition plate 4 in the spiral heat exchanger E1 of the first embodiment, a box body is provided at the center of the spiral heat exchanger E2. 11 and arc-shaped plates 12, 12 are provided. In this case, the box 11 and the arc-shaped plates 12, 1
2 has channels A1, A on its peripheral surface at approximately 90 degree intervals.
A plurality of second inlets / outlets 1a, 1b, 1c, 1d which are opened substantially uniformly in the width direction of 2, B1, B2 are formed.
The second entrance / exit 1a, 1b, 1c, 1
d so as to be separated from each other.
The inner peripheral end of d is joined in a watertight manner by welding or the like. Further, the arc-shaped plates 12, 12 and the arc-shaped plates 12, 12
And a closed box body 11 shorter than the length and formed in a rectangular cross section is joined in a watertight manner by welding or the like.
A communication portion (not shown) of the header portions 31 formed by the arc-shaped plate 12 and the box body 11 is formed in the upper portion of the first portion, and the flow passages B1 and B are formed through the second inlets and outlets 1c and 1d.
The header section 31 communicating with the flow path A1 and the header section 32 communicating with the flow paths A1 and A2 via the second inlets and outlets 1a and 1b are separated from each other. The other configuration of the spiral heat exchanger E2 of the present embodiment is the same as that of the spiral heat exchanger E1 of the first embodiment.

FIGS. 5 and 6 show a third embodiment of the spiral heat exchanger of the present invention. This spiral heat exchanger E
3 is an inner cylinder 1 of the spiral heat exchanger E1 of the first embodiment for forming two independent header portions 32, 31 for the flow paths A1, A2 and the flow paths B1, B2.
And a spiral heat exchanger E2 instead of the vertical partition plate 4.
The vertical partition plates 21, 22, 23, 24 and the horizontal partition plates 81, 81, 82, 82 are arranged at the center of the. In this case, the vertical partition plates 21, 22, 23, 24
Is made of a metal plate bent in a substantially rectangular shape, and formed integrally with the inner peripheral end of the partition wall 2a, 2b, 2c, 2d made of the metal plate or by extending the partition wall itself, Are joined to each other so as to be joined in a watertight manner by welding or the like. And the vertical partition plates 21, 22, 2
3 and 24 and horizontal partitions 8 near the upper end and the lower end of the space defined by the partitions 2a, 2b, 2c and 2d.
1, 81, 82, and 82 are alternately and water-tightly joined by a method such as welding to separate a header portion 31 communicating with the flow passages B1 and B2 and a header portion 32 communicating with the flow passages A1 and A2. To The other configuration of the spiral heat exchanger E3 of the present embodiment is the same as that of the spiral heat exchanger E1 of the first embodiment.

In the spiral heat exchangers E1, E2, and E3 of the above embodiments, a high-temperature fluid is supplied to the flow path including the inlet / outlet 71, the header section 32, the flow paths A1, A2, and the inlet / outlet 72. Outlet 61, channels B1, B2, header section 31
And the case where the low-temperature fluid flows through the flow path composed of the inlet and outlet 62 has been described.However, the present invention is not limited to this case. Can be reversed.

[0026]

According to the spiral heat exchanger of the present invention, one inlet and one outlet for the high-temperature fluid and one low-temperature fluid are provided, respectively.
With a configuration including a total of four connection portions, the piping structure for the heat exchanger can be simplified. Thereby, the installation work of the heat exchanger and the like can be easily performed, and the heat insulation facilities for the pipes can be simplified, so that the facility cost and the construction cost of the pipes can be reduced. The degree of freedom in designing the positions for forming the connection portions of the inlet and outlet of the high-temperature fluid and the low-temperature fluid is increased, and a small-sized heat exchanger to which a configuration in which four flow paths are formed in a spiral shape is applied. Becomes possible.

Further, by forming at least one of the connection portions for the fluid inlet and outlet formed at the outer peripheral end of the flow path at the end face of the heat exchanger main body, the connection portion formed at the outer peripheral surface of the heat exchanger main body is formed. The number can be reduced or eliminated, the installation work of the heat exchanger, etc. can be easily performed, and the degree of freedom in designing the positions for forming the connection portions of the inlet and outlet of the high-temperature fluid and the low-temperature fluid is increased. can do.

Further, at least one of the connection portions of the fluid inlet and outlet formed at the outer peripheral end of the flow passage is formed at a substantially intermediate position in the width direction of the flow passage on the outer peripheral surface of the heat exchanger body. A large flow rate of fluid can be uniformly distributed through the two flow paths connected to the section, and the heat exchange efficiency can be improved.

Further, a connection portion of the fluid inlet / outlet formed at the inner peripheral end of the flow passage is formed on the end face of the heat exchanger body, and the inlet / outlet and the flow passage are defined by the width of the inner peripheral end of the flow passage. By communicating through the second inlet / outlet which is opened substantially uniformly in the direction,
A large flow rate of fluid can be uniformly distributed through the four flow paths, and the heat exchange efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing a first embodiment of a spiral heat exchanger of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIGS. 3A and 3B are external explanatory views showing a spiral heat exchanger of the present invention, wherein FIG. 3A is a plan view and FIG. 3B is a front view.

FIG. 4 is a sectional plan view showing a second embodiment of the spiral heat exchanger of the present invention.

FIG. 5 is a plan sectional view showing a third embodiment of the spiral heat exchanger of the present invention.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

7A and 7B are explanatory views showing the appearance of a conventional spiral heat exchanger, wherein FIG. 7A is a plan view and FIG. 7B is a front view.

FIG. 8 is a sectional plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner cylinder 1a, 1b, 1c, 1d 2nd entrance / exit 2a, 2b, 2c, 2d Partition wall 11 Box 12 Arc-shaped plate 21, 22, 23, 24 Vertical partition plate 31 Header 32 Header 4 Vertical partition plate 5 Horizontal Partition plate 51 Upper end plate 52 Lower end plate 53 Gasket 54 Gasket 61, 62, 71, 72 Inlet / outlet 81 Horizontal partition plate 82 Horizontal partition plate A1, A2, B1, B2 Channel

Claims (4)

[Claims] 1. A spiral heat exchanger in which four flow paths are formed spirally by partition walls, and a high-temperature fluid and a low-temperature fluid are circulated every other one of the four flow paths. The channels to be circulated and the channels to circulate the low-temperature fluid communicate with each other at the inner and outer ends of the channels in the heat exchanger body, and the inlet and outlet of the high-temperature fluid and the low-temperature fluid are connected by one connection. A spiral heat exchanger, comprising: 2. The spiral heat exchanger according to claim 1, wherein at least one of the fluid inlet / outlet connection portions formed at the outer peripheral end of the flow path is formed at an end face of the heat exchanger body. 3. A method according to claim 1, wherein at least one of the fluid inlet / outlet connection portions formed at the outer peripheral end of the flow passage is formed at a substantially intermediate position in the width direction of the flow passage on the outer peripheral surface of the heat exchanger body. The spiral heat exchanger according to claim 1. 4. A connection part for a fluid inlet / outlet formed at an inner peripheral end of the flow passage is formed on an end face of the heat exchanger body, and the inlet / outlet and the flow passage are connected to each other at a width of an inner peripheral end of the flow passage. The spiral heat exchanger according to claim 1, 2 or 3, wherein the heat exchangers communicate with each other through a second inlet / outlet that opens substantially uniformly in the direction.