JPH0259391B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Technical Field The present invention relates to a heat exchanger, and particularly to a so-called plate-and-shell type heat exchanger that is housed in a plurality of plate shells that are joined together.

B. Prior Art When using a large number of heat exchangers, such as in an absorption heat pump, conventionally, the individual heat exchangers were connected by piping. For example, in the case of an absorption heat pump, at least five types of heat exchangers are used, but in addition to the cost of the heat exchangers themselves, there are various connections between them such as high vacuum steam piping, demister, and liquid piping. The cost was very high because it required piping and required a large amount of installation space.

C. Purpose of the Invention The present invention seeks to solve the above-mentioned conventional problems when using a large number of heat exchangers. That is, an object of the present invention is to provide a heat exchanger that has at least two types of heat exchange functions in one unit, which can simplify piping and require less installation space.

D. Structure of the Invention The heat exchanger of the present invention is a plate and
In a shell heat exchanger, a fixed shell 10 and a movable shell 3 each open at at least one end.
0 are joined to each other at the open ends 13 and 33 with a separation plate 51 interposed therebetween.

E. Effects of the Invention According to this invention, piping becomes extremely simple.
It is possible to provide a heat exchanger that is compact and exhibits at least two types of heat exchange functions in one unit. The heat exchanger of the present invention therefore has the advantage that it does not require a large amount of installation space, and in addition, the maintenance space is sufficient for approximately one unit.

F. Embodiments Hereinafter, embodiments of the present invention shown in the drawings will be described.

Referring first to FIG. 1, the heat exchanger includes a fixed shell 10 and a moving shell 30. In the illustrated embodiment, the fixed shell 10 side is used as an evaporator, and the movable shell 30 side is used as a condenser, but other combinations such as an absorber and a regenerator are also possible depending on the steam pressure. be.

The fixed shell 10 has a hollow cylindrical shape with an elliptical cross section (FIG. 2) extending in the horizontal direction, has a concentrate outlet 11 at the bottom, an opening 13 with a flange 12 at one end, and has an opening 13 with a flange 12 at one end. The other end 14 is provided with a supply port 15 and a discharge port 16 for heat source fluid.

A plurality of plates 17 are tightened between the fixed shell 10 and the movable frame 18 by tightening means such as bolts. As can be seen from FIG. 2, each plate 17 is approximately rectangular and has through holes 19 and 20 that allow the heat source fluid to flow therethrough. The plate 17 extends vertically, and when the plates 17 are placed palm to face, all the through holes 19 and 20 are aligned, respectively, and the through hole 19 communicates with the supply port 15 and the through hole 20 communicates with the discharge port 16. .

When these plurality of plates 17 are brought into contact with each other through gaskets, alternating paths A and B are formed between the plates.

To explain in detail, as can be clearly seen from Figure 4,
The heat source fluid passage A is connected to the fixed shell 10 by a gasket 21 extending along the outer periphery of the plate 17.
The inner space C of the through hole 1 is closed, while the through hole 1
9, 20 and thus also with the supply 15 and the discharge 16 of the heat source fluid. The passage B of the fluid to be evaporated is separated from the through holes 19, 20 by partially cut out gaskets 22 ₁ - 22 ₃ , while the cut out parts of the gaskets, i.e. the openings 23 ₁ - in the upper, side and lower parts, It communicates with the interior space C of the fixed shell 10 through ₂₃₄ .

A header 25 equipped with a group of nols 24 for injecting the liquid to be evaporated into each passage B opens the upper opening 23 ₁ and the side opening 23 of the passage B, respectively.
It is located so that Nors 24 can be seen at ₂ , 23 ₃ . In the illustrated example, the Nords group is provided in 33 stages, but it may be provided in 2 stages or 4 stages or more as necessary.

Inside the fixed shell 10, in addition to the portion occupied by the plate 17, there is a steam derivation space D that functions for deriving the steam generated in the passage B and separating mist.
is defined. In addition, this steam extraction space is
In addition to being defined in a portion of the hollow cylindrical fixed shell 10 in the axial direction as in the illustrated example, it can also be defined on both sides of the plate 17 in a cross section perpendicular to the axis (FIG. 2). In that case, the length of the fixed shell 10 in the axial direction can be shortened.

The moving shell 30 has a hollow cylindrical shape with an elliptical cross section (FIG. 3) extending in the horizontal direction, has a condensate outlet 31 at the bottom, an opening 33 with a flange 32 at one end, and has an opening 33 with a flange 32 at one end. The other end 34 is provided with a cooling water supply port 35 and a discharge port 36.

A plurality of plates 37 are tightened between the movable shell 30 and the movable frame 38 by tightening means such as bolts. As can be seen from FIG. 3, each plate 37 is approximately rectangular and has through holes 39 and 40 that allow cooling water to flow therethrough. The plate 37 extends vertically, and in the palm-to-palm state all through holes 39 and 40 are aligned, respectively, with the through hole 39 communicating with the supply port 35 and the through hole 40 communicating with the discharge port 36.

When these plurality of plates 37 come into contact with each other via gaskets, alternating passages E and F are formed between the plates. Specifically, as can be clearly seen from FIG. 5, the cooling water passage E is closed off from the internal space G of the movable shell 30 by the gasket 41 extending along the outer periphery of the plate 37, while the passage E is closed off from the internal space G of the moving shell 30. It communicates with the holes 39, 40 and thus also with the cooling water inlet 35 and the outlet 36. The steam passage F is connected to the through hole 3 by partially cut out gaskets 42 ₁ to 42 ₂ .
9, 40, while openings 43 in the cutout portions of the gasket, i.e., the top, sides, and bottom.
It communicates with the internal space G of the moving shell 30 through ₁ to ₄₃₄ .

The movable shell 30 is suspended so as to be movable along the guide rail 50, and is flanged to the open end 13 of the fixed shell 10 at the open end 33 via a separation plate 51.

The movable shell 30 may be movably suspended as shown in the figure, or may be moved on a guide rail laid on the base. In any case, the maintenance space during disassembly is limited to the conventional heat exchanger 1.
It only takes one machine, which is very advantageous.

A separation plate 51 interposed between the fixed shell 10 and the movable shell 30 has a communication hole 52 in its upper part. 5
3 is a normal demister.

Next, the operation of this embodiment having the above-described configuration will be described.

The heat source fluid supplied from the supply port 15 provided in the fixed shell 10 flows into each passage A through the through hole 19 as shown by the solid line arrow in FIG.
0 and reaches the outlet 11.

The liquid to be evaporated is injected from the nozzle 24 into the passage B and flows down in a thin film on the heat transfer surface of the plate 17 facing the passage B, as shown by the broken line in FIG.

At this time, steam is generated by heating by the heat source fluid flowing through the adjacent passage A. The unevaporated liquid, that is, the concentrated liquid, falls through the opening 23 ₄ at the bottom of the passageway B to the bottom of the fixed shell 10 and is taken out through the outlet 11 .

The steam generated in passage B is
As shown by the chain arrow in the figure, the steam flows out from the opening 23 ₄ at the bottom of the passage B to the steam outlet space D, and then flows to the communication hole 52 of the separation plate 51. During this time, the steam follows a generally U-shaped path, but when changing direction from the opening 23 ₄ located below to the communication hole 52 located above, the mist is separated from the steam and settles at the bottom of the fixed shell 10. .
If there is still mist mixed in the steam, it is captured by the demister 53.

The steam flowing into the moving shell 30 through the communication hole 52 flows through the upper and side openings 43 ₁ to 4 as shown by chain arrows in FIGS. 1 and 5.
3 Flows into passage F from ₃ .

Cooling water supplied from the supply port 35 flows into the adjacent passage E through the through hole 39 as shown by the solid arrow in FIG. 5, flows out through the through hole 40, and reaches the discharge port 36. Thus, the steam in the passage F is cooled and condensed by the cooling water in the adjacent passage E, and the condensed liquid falls to the bottom of the fixed shell 30 through the lower opening ₄₃₄ and is taken out through the outlet 31.

Although the embodiment described and illustrated above has two types of heat exchange functions, one or more additional moving shells may be provided interposed between the fixed shell 10 and the moving shell 30. This makes it possible to provide a heat exchanger that can perform three or more heat exchange functions. In that case, the intermediate moving shell could itself be open at both ends.

[Brief explanation of drawings]

The drawings show an embodiment of the heat exchanger of the present invention, and FIG. 1 is a vertical cross-sectional view, and FIG.
FIG. 3 is a cross-sectional view taken along the - line in FIG. 1, and FIGS. 4 and 5 are exploded perspective views showing how the plates overlap and the state of fluid flow, respectively. 10... fixed shell, 13, 23... open end,
30...Moving shell, 51...Separation plate.

Claims (1)

[Claims] 1. In a plate-and-shell heat exchanger in which a plurality of plates facing each other are housed in a shell, a fixed shell and a movable shell, each of which is open at at least one end, are connected via a separating plate. , A heat exchanger characterized in that the open ends are joined to each other. 2. One of the fixed shell and the movable shell,
Inlet and outlet for heat source fluid; Concentrate outlet; They are connected to each other through gaskets and communicated with the internal space of the shell through openings at the top, both sides, and bottom; A vertical passageway that alternately forms first passages that are closed to the supply port and the discharge port, and second passages that are closed to the internal space of the shell and communicate with the supply port and the discharge port of the heat source fluid. and a group of nols arranged in multiple stages for injecting the liquid to be evaporated inward from the upper and side openings of the first passage; The plate is provided with a communication hole in the upper part, and the other of the fixed shell and the movable shell is
Cooling water inlet and outlet; condensate outlet;
and a first passage that is connected to the internal space of the shell through openings at the top, both sides, and the bottom of the shell, while being closed to the cooling water supply port and the discharge port. and a plurality of vertically extending plates that close the internal space of the shell and alternately form second passages communicating with the cooling water supply port and the discharge port. A heat exchanger according to claim 1.