JPS6226489A - Panel type heat exchanger - Google Patents

Abstract

PURPOSE:To facilitate assembling and dismantling and simplify maintenance as well as inspection work by a method wherein first and second fluids, effecting heat exchange with each other, are made to flow through closed type flow paths respectively while one of the flow paths is formed by the internal flow path of a hollow panel. CONSTITUTION:The first fluid, flowing through the flow paths 3 in respective hollow panels 1, and the second fluid, flowing through the second flow paths 46 between respective hollow panels 1, effect heat exchange with each other through plates 2. In the case of overhaul, respective hollow panels 1, annular seal members 35 and backup rings 38 are pulled out of respective tubes axially and endless seal members 37 are removed. As a result, respective hollow panels 1 can be handled freely and the outside surfaces of respective hollow panels 1, each serving as either side surface of the second flow path 46, are exposed, therefore, necessary maintenance work may be effected simply and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a system in which closed flow paths for a first fluid and a second fluid for mutual heat exchange are formed between plates arranged in parallel at predetermined intervals. The present invention relates to a panel heat exchanger configured to perform heat exchange between a first fluid and a second fluid flowing in a closed flow path between the plates, through the plates. be.

(Prior art and its problems) The panel type heat exchanger as described above has a total of four pipes: a first fluid supply pipe, a first fluid discharge pipe, and a second fluid supply pipe and a second fluid discharge pipe. A large number of plates are fitted in parallel to the body, a sealing material is interposed between the peripheral parts of each plate to form a flow path between the plates, and plates on both sides of the flow path are positioned at every other plate. An annular sealing material is interposed around each pipe in between, so that every other channel among the channels is connected to the outer periphery of the first fluid supply pipe and the first fluid discharge pipe. The remaining flow path is configured to communicate with the outer peripheral circulation holes of the second fluid supply pipe and the second fluid discharge pipe.

In such a conventional panel heat exchanger, the plates forming each flow path can be individually disassembled, so that by disassembling it, the interior of all flow paths, that is, the side surfaces of each plate can be maintained and inspected. Therefore, it can be used as a heat exchanger for handling fluids that tend to have scale adhering to the sides of the channels, but since all the channels are assembled from plates and sealing materials, there are a large number of parts, and it is difficult to assemble or disassemble. The disadvantage was that it required a lot of effort and time.

(Means for solving the problem) On the other hand, it is rare that the two types of fluids that are supplied to this type of heat exchanger and exchange heat with each other are fluids that are likely to generate scale. For example, one fluid is usually a fluid that is rather difficult to generate scale, such as water, hot water, or steam.

In view of these points, the present invention proposes a new type of panel heat exchanger that can solve the conventional problems as described above, and its feature is that two plates are placed between them. A heat exchange hollow panel configured to be joined to each other to form a flow path includes through holes through which a first fluid supply pipe and a first fluid discharge pipe are passed separately, communicating with the flow path inside the hollow panel. At the same time, through holes for passing the second fluid supply pipe and the second fluid discharge pipe separately are provided in a state that they are cut off from the flow path inside the hollow panel, and each of the first fluid supply pipe and the second fluid discharge pipe has a communication hole on the outer periphery. A required number of hollow panels are fitted to the fluid supply pipe and the first fluid discharge pipe, and to the second fluid supply pipe and the second fluid discharge pipe, respectively, using the corresponding through holes, and each hollow puffle is fitted. In between, the first fluid supply pipe and the first fluid discharge pipe are shielded from the outside world by a sealing material interposed between the hollow panels around the hollow panel, and the second fluid supply pipe and the first fluid discharge pipe are Each hollow gunnel is fastened and integrated so that it can be pulled out and disassembled in the axial direction of the pipe, with the second fluid flow path communicating only with the outer circumferential circulation hole of the two-fluid discharge pipe formed.

(Function) In the configuration of the present invention as described above, the outer peripheral communication hole of the first fluid supply pipe and the discharge pipe communicates only with the flow path inside each hollow panel, and the second fluid supply pipe and The outer circumferential communication hole of the discharge pipe communicates only with a closed second flow path that is isolated from the outside world and the periphery of the first fluid supply pipe and the discharge pipe by a sealing material between each hollow panel. Therefore, the first fluid supplied to the first fluid supply pipe flows through the flow path inside each hollow panel and flows into the first fluid discharge pipe, and the second fluid supplied to the second fluid supply pipe flows through each hollow panel. The fluid flows through the closed second flow path formed between the hollow panels and flows into the second fluid discharge pipe, and the heat exchange action between the first and second fluids is caused by the side wall of each hollow panel. This will be done through the plate.

When maintenance or inspection of the second flow path formed between each hollow panel becomes necessary, the tightening of each hollow panel in the tube axis direction is released and each hollow panel and sealing material are By pulling out the second fluid supply pipe and the discharge pipe in the axial direction, each hollow panel can be separated and the second flow path can be opened.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a rectangular hollow panel for heat exchange, and a seam weld 4 is formed around the periphery of both plates 2 so as to form a flow path 3 between the two plates 2. They are integrally connected to each other. Among the four corners of each hollow panel 1, the second floor located diagonally has a through hole 6 through which the first fluid supply pipe 5 passes and a first fluid discharge pipe 7.
A through hole 8 is provided to allow the second fluid supply pipe 9 to pass through, and a through hole 12 to allow the second fluid discharge pipe 11 to pass through is provided on the remaining second floor.

As shown in FIG. 4 and FIG.
A reinforcing ring 13 is fitted and fixed concentrically with the through hole 6 in between. This reinforcing ring 13 has the same inner diameter as the through hole 6, and has an annular groove 14 carved in the inner periphery, and a communication hole 1 that penetrates from the bottom of the annular groove 14 to the outer circumferential surface of the reinforcing ring.
5 are provided radially. Although illustration of the detailed structure is omitted, the reinforcing ring 1 is also located at the location where the through hole 8 for passing the first fluid discharge pipe 7 is provided, as shown in FIG.
3 are similarly fitted and fixed. These reinforcing rings 13
The position may be fixed by welding or the like, but it is preferable that protrusions for positioning the reinforcing ring 3 are integrally formed on both side plates 2.

As shown in FIGS. 7 and 8, the through hole 10 through which the second fluid supply pipe 9 passes is formed by a cylindrical portion 16 integrally molded and protruded from one plate 2 toward the other plate 2. The free end of this cylindrical portion 16 and the inner peripheral edge of the through hole of the other plate 2 are welded together to form the through hole 1.
0 is configured to be cut off from the flow path 3 inside the hollow panel. Although illustration of the detailed structure is omitted, the through hole 12 through which the second fluid discharge pipe 11 passes is also constructed in the same manner as shown in FIG. 3.

The first fluid supply pipe 5, first fluid discharge pipe 7, second fluid supply pipe 9, and second fluid discharge pipe 11 are fluid supply main pipes 18 and 19, respectively, as shown in FIGS. 1 to 3. The main fluid discharge pipe 20.21 is fixedly protruded in a T-shape through joint pipes 22 to 25 at the inner end thereof, and the free end has threaded parts 26 to 25.
29, and slit-shaped communication holes 30 to 33 extending along the axial direction are provided at a plurality of locations (four locations in the illustrated example) in the circumferential direction in the mounting area of the hollow panel 1.

The hollow panel 1 includes the first fluid supply pipe 5, the first fluid discharge pipe 7, the second fluid supply pipe 9, and the second fluid discharge pipe 11.
The required number of sheets are fitted in parallel using the through holes 6.8 and 10.12 corresponding to the holes 6.8 and 10.12, respectively. , there is an annular sealing material 3 that fits around the eight pipes 5.7 and 9.11.
4 is interposed between each hollow panel 1, an annular sealing material 35 that fits over the first fluid supply pipe 5 and the first fluid discharge pipe 7, and a second fluid supply pipe 9 and a second fluid discharge pipe 7 are provided. A spacing ring 36 that fits around the tube 11 and an endless sealing material 37 located between the peripheral portions of each hollow panel 1 are interposed.

As shown in FIGS. 4 and 6, each of the annular sealing members 34
．． 35 is fitted with a hack-up ring 38 that regulates the distance between adjacent hollow panels 1. Further, the spacing ring 36 has exactly the same structure and dimensions as the reinforcing ring 13 fitted and fixed inside each hollow panel 1, as shown in FIGS. 7 and 9. It has an annular groove 39 on the inner periphery and radial communication holes 40.

As above, the required number of hollow panels 1 are 8 tubes 5.7.9
．． 11, the hollow panel 1 at the outer end position
8 pipes 5.7, 9.11 and a backup ring are interposed between the 8 pipes 5.7 and 9.11.
By tightening the nuts 42 to 45 screwed into the free end threads 28 to 31 of the pipes 5, 7, 9, 11, the 8 pipes 5, 7, 9, .
A group of hollow panels are fastened and integrated in the axial direction of 11. At this time, due to the presence of the spacing ring 36 and the backup ring 38, each annular sealing material 34, 35 and endless sole material 37 are compressed to a constant state to obtain the desired sealing effect, and at the same time, each hollow A constant gap is maintained between the panels 1. The gap between each of the hollow panels 1 is closed off from the outside world and the surroundings of the first fluid supply pipe 5 and the first fluid discharge pipe 7 by the annular sealing material 35 and the endless sealing material 37. A flow path 46 is formed.

Furthermore, the free end threads 28 to 31 of the eight pipes 5.7 and 9.11
Camps 47 to 50, which also serve as lock nuts, are screwed into the holes to close the free end openings of the eight tubes 5, 7, 9, and 11.

Incidentally, at an appropriate location on the side of each hollow panel 1, there is a connecting rod 5 which penetrates the seam welded part 4 of each hollow panel 1 and has a spacer 51 loosely fitted between each hollow panel 1.
2 and nuts 53 screwed into both ends 1Ill1 of the shaft rod 52. As a result, the endless sealing material 37 interposed between the peripheral portions of each hollow panel 1 can be appropriately compressed, and the desired sealing effect can be obtained. Reference numeral 54 denotes a plate for holding the central position of the shaft rods 52 located on both sides of the shaft rods 52, and the joint pipes 22 to 25 located at the center of the container tubes 5, 7, 9, and 11. It is attached to via a bracket 55 and bolts and nuts 56. Of course, all shaft rods 5
2 may be held by the plate 54.

In the panel heat exchanger configured as above,
The first fluid supplied from the first fluid supply main pipe 18 enters the first fluid supply pipe 5 from the joint pipe 22 and flows out from the slit-shaped flow hole 30. This fluid flows from the inner circumferential annular groove 14 of the reinforcing ring 13 in each hollow panel 1 to the radial flow path 1
5 into the flow path 3 in each hollow panel 1, and after flowing through the flow path 3, the reinforcing ring 13 loosely fits into the first fluid discharge pipe 7, and the radial flow path 15, Circumferential annular groove 14
, and flows into the fluid discharge pipe 7 via the slit-shaped circulation hole 31 of the first fluid discharge pipe 7, and from within this fluid discharge pipe 7 via the joint pipe 24 and the first fluid discharge raw mushroom 20. be discharged.

On the other hand, the second fluid supplied from the second fluid supply main pipe 19 enters the second fluid supply pipe 9 from the joint pipe 23 and flows out from the slit-shaped flow hole 32. This fluid is applied to each hollow panel 1
The second flow path 4 between each hollow panel 1 via the radial flow path 40 from the inner circumferential annular groove 39 of the spacing retaining ring 36 between them.
6 and flows through this flow path 46, the radial flow path 40 of the spacing ring 36, which loosely fits into the second fluid discharge pipe 11, the inner circumferential annular groove 39, and the second fluid discharge pipe 11. The liquid flows into the fluid discharge pipe 11 through the slit-shaped flow hole 33 and is discharged from the fluid discharge pipe 11 via the joint pipe 25 and the second main fluid discharge pipe 21.

Therefore, the first fluid flowing in the channel 3 in each hollow panel 1 and the second fluid flowing in the second channel 46 between each hollow panel 1 are connected to the plate 2 that partitions both channels 3 and 46. The two fluids exchange heat with each other through the two fluids, and the desired heat treatment involving heating or cooling of one of the fluids is performed.

The panel heat exchanger used as described above can be disassembled and cleaned as follows. That is, each connecting rod 52
The nuts 53 screwed onto the free ends of the containers 5.7 and 9.11 are removed, each shaft rod 52 is pulled out from each hollow panel 1, and each spacer 51 is removed. By removing the caps 47 to 50 and the pads 42 to 45, each hollow panel 1, the annular sealing material 34°35.41, and the backup ring 38 are removed from the container 5.
,? , 9.11 in the axial direction, and the endless sealing material 37 can be removed. As a result, each hollow panel 1 can be freely handled independently, and the outer surfaces of each hollow panel 1, which form both sides of the second flow path 46, are opened, so necessary maintenance work can be easily performed. I can do it.

Note that the reinforcing ring 13 and the spacing ring 36 are not essential to the present invention. Of course, as already explained, the use of these rings 13, 36 brings good results and is therefore desirable, but even in this case, the structure and molding material are not limited. For example, instead of the reinforcing ring 13, from the plate 2 on one side, one """I'a#Ehf,:,"4 dog body 9
8"1" material 7187 cylinder It is also possible to interpose a 1-shaped body between the plates 2 on both sides concentrically with the through hole 6, and provide a communication hole corresponding to the above-mentioned communication hole 15 in this cylindrical body. Furthermore, the method of blocking the through hole 10 from the flow path 3 in the hollow panel 1 is not limited to the method of the embodiment in which the cylindrical portion 16 integrally formed from the plate 2 on one side is used. In the example, the periphery of each hollow panel 1 is
1□ □ −)v′t′, 6＠陾′, t-/′tt37J″I, 7
・As shown in FIG. 7, a 14-shaped seal 11 having grooves on both sides is used, and a protrusion 2a that fits into the groove is formed on the hollow panel 1 side to form an endless sealing material 370. Although positioning is facilitated, the cross-sectional shape and positioning method of this endless sealing material 37 are not limited to this embodiment. For example, it is also possible to use a material having the same cross-sectional shape and same cross-sectional dimensions as the annular sealing material 35.

Furthermore, in the embodiment, the width of the channel 3 in the hollow panel 1 (the gap between the plates 2 on both sides) was configured to be equal to the width of the second channel 46 formed between each hollow panel 1, but the width You can change it. Furthermore, an inwardly protruding lip for regulating the fluid flow path in the flow path 3 in the hollow panel 1 can be provided to protrude from at least one of the both side plates 2 by integral molding or by using a separate member. . Similarly, each hollow panel 1
A protruding rib for regulating the fluid flow path in the second flow path 46 between the two is integrally molded or formed as a separate member from at least one of the outer surfaces of the hollow panel 1 (the outer surface of the plate 2) located on both sides. It can also be used to protrude.

(Effect of the invention) The panel heat exchanger of the present invention that can be implemented as described above has the following features:
Although the first fluid and the second fluid, which exchange heat with each other, both flow in closed channels, one of the channels is formed by an internal channel of a hollow panel. Knoll material to specify the flow path is unnecessary. That is, since it is only necessary to use the sealing material between the hollow panels forming the other flow path, the number of parts is small, and assembly and disassembly can be performed very easily. Therefore, if a fluid that is likely to generate scale is supplied to the flow path between each hollow panel, by removing each hollow panel from the container at an appropriate time and separating it, the flow path between each hollow panel can be removed. Necessary maintenance and inspection work, such as removing scale, can be performed extremely easily by opening the door.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal side view, FIG. 2 is a partially longitudinal front view showing the flow path of the first fluid, and FIG. 3 is a partially longitudinal front view of the main part illustrating the flow path of the second fluid. Fig. 4 is a longitudinal sectional front view showing the supply points of the first fluid into each hollow panel, Figs. Vertical front view showing the supply location, No. 8
FIG. 9 is a vertical sectional side view of FIG. DESCRIPTION OF SYMBOLS 1... Hollow panel for heat exchange, 2... Hollow panel constituent plate, 3... Channel inside hollow panel, 5... First fluid supply pipe, 6.8.10.12... Each pipe through hole,
7... First fluid discharge pipe, 9... Second fluid supply pipe, 1
1... Second fluid discharge pipe, 13... Reinforcement ring, 14
, 39... Inner circumferential annular groove, 15.40... Radial distribution hole, 16... Cylindrical portion, 1819... Fluid supply main pipe, 20.21... Fluid discharge main pipe, 22-25. ...Joint pipe, 30-33...Slit-shaped flow hole, 34,35
．． 41... Annular sealing material, 36... Spacing retaining ring, 37... Endless sealing material, 38... Backup ring, 42-45... Hollow panel fastening nut,
46...Second channel, 47-50...Camp for double use as long nanonote, 51...Spacer, 52...Shaft rod for connection, 54...Shaft rod support plate.

Claims (1)

[Claims] A hollow panel for heat exchange, which is constructed by joining two plates to each other so as to form a flow path between them, has a through-hole through which a first fluid supply pipe and a first fluid discharge pipe pass through each hollow panel. In addition to being provided in a state that communicates with the flow path inside the panel,
Through holes for penetrating the second fluid supply pipe and the second fluid discharge pipe are provided in a state where they are cut off from the flow path inside the hollow panel, and the first fluid supply pipe and the second fluid discharge pipe each have a communication hole on their outer periphery. one fluid discharge pipe, and a second fluid supply pipe and a second fluid discharge pipe;
A required number of the hollow panels are fitted using the corresponding through holes, and a hole is formed between each hollow panel, around the first fluid supply pipe and the first fluid discharge pipe, and around the hollow panel. Each hollow panel is provided with a second fluid passage formed therein, which is isolated from the outside world by a sealing material interposed between the hollow panels, and which communicates only with the outer peripheral circulation holes of the second fluid supply pipe and the second fluid discharge pipe. A panel-type heat exchanger characterized by a panel-type heat exchanger that is fastened and integrated so that it can be pulled out in the axial direction of the tube and disassembled.