JPH0449504Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a heat exchanger that exchanges heat between a plurality of fluids having different temperatures.

[Conventional technology]

A heat exchanger has a plastic tube inside a shell, and fluids with different temperatures are passed through the shell and tube so that the heat of the high temperature fluid is transferred to the low temperature fluid via the tube. There are (Special Publications 1984-500864, etc.). In order to increase the heat transfer coefficient in this case, the tube is composed of a plurality of thin tubes, so that the contact area between the tube and the fluid flowing in the shell is increased. Here, plastic sleeves are fitted onto both ends of the plurality of thin tubes, and they are integrated by heat fusion or the like to form a honeycomb-like airtight joint. Conventionally, a plurality of buttful plates 10 having a shape as shown in FIG. 5 are inserted into the tube bundle, and a plurality of the buttful plates 10 are arranged at predetermined intervals within the shell to hold the middle portions of the tubes. ing. This buttful plate 10 has a diameter approximately equal to the inner diameter of the shell, and has a plurality of circular insertion holes 1.
0a, and a communication hole 10b having a larger area than these insertion holes 10a, and these insertion holes 1
The tubes are held in a plurality of groups by being inserted into the tube 0a. In this case, each bulk plate 10 is connected to the large communication hole 10b.
Place the areas where you have opened up and down alternately. In this case, a plurality of tubes are densely arranged in the circular insertion hole 10a, and therefore, the gaps created between the tubes inserted through the insertion hole 10a and between the tubes and the buff-full plate 10 are small. This allows the fluid flowing through the shell to pass through the through hole 10.
The amount of water that passes through a is small, but it flows between the tubes, and the buttful plates 1 are arranged alternately above and below.
Since the heat exchanger passes through the zero flow holes 10b, a turbulent flow is created and the heat exchange efficiency can be increased.

[The problem that the idea attempts to solve]

However, in the conventional heat exchanger described above, a plurality of tubes are inserted into one circular hole of the buffle plate. Therefore, among these tubes, the tube inserted through the center part of each insertion hole 10a is surrounded by other tubes and hardly comes into contact with the fluid flowing inside the shell. There is a problem in that there is not much heat exchange between the fluid flowing through the tube inserted through the central portion of the tube 10a and the fluid flowing inside the shell.

In addition, if a heat exchanger is used continuously for a certain period of time, scales containing fluid may adhere to the inner surfaces of the shell and tube, and the surface of the tubes, reducing the heat exchange efficiency. Work must be done to remove this scale, etc. In this case, in order to clean each tube one by one, it is easier to remove the buttful plate from the tube, but in the conventional heat exchanger, both ends of the tube bundle are integrated. There was a problem in that it could not be removed from the tube because it could not be separated. Also, Batsuful Plate 1
0, the end of the tube is inserted into the hole 10a of the buttful plate 10 in advance and the end is formed, which makes the work difficult and requires the work of moving the buttfull plate 10 to a specified position. However, in this case, since the tubes are tightly inserted into the respective insertion holes 10a, it is difficult to move them, which is surprisingly troublesome.

Thus, in the prior art, there has been an unresolved problem that there is no heat exchanger having a buff-full plate that can hold the tubes apart and is easy to attach and detach from the tubes.

[Means to solve the problem]

Therefore, we proposed a heat exchanger in which a tube bundle made up of a plurality of tubes that allow fluid to pass through is inserted into a shell, and a bundle plate formed by opening a plurality of slits with one end open to the outer periphery. The slits are disposed within the shell, intersecting the fluid flow direction and at appropriate intervals, and the tubes are inserted through the slits to support the midway portions of the tubes.

[Effect]

This heat exchanger is held by inserting a bundle of tubes into a shell, and inserting the midway portion of the tube into a slit formed in a baffle plate from its open end. For this reason, gaps are formed on the sides of the tubes to create gaps between the tubes that pass through different slits, allowing the fluid flowing inside the shell to flow through the gaps between the tubes. . Also,
When disassembling and assembling the heat exchanger, the midway portion of the tube can be directly inserted into and removed from the slit in the buffle plate.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the drawings.

FIG. 1 is a block diagram of a heat exchanger.

This heat exchanger is a tube-and-shell type heat exchanger, and a plurality of bundles 7 of plastic tubes are piped inside the shell 1.

The shell 1 includes a shell main body 1a that is a cylindrical flange pipe, an inflow shell nozzle 1b provided at the upper right portion, and an outflow shell nozzle 1c provided at the lower left portion. Shell nozzle 1b, 1c
is integrally molded with the shell body 1a, and the fluid flowing in from the inflow shell nozzle 1b passes through the shell body 1a and flows into the outflow shell nozzle 1c.
It is starting to flow out from the

End caps 2 are attached to both ends of the shell 1, and a sleeve 6, which will be described later, is fitted into the end cap 2. A seal ring 10 is fitted to the flange portion of the flange and is hermetically fixed.

Inside the shell 1 a bundle 7 of plastic tubes is inserted along its length. For each tube 7a constituting this tube bundle 7, a material having characteristics adapted to the properties of the fluid flowing within the shell 1 and within the tube is used. Fluororesins, especially PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer), are most suitable for use in a variety of applications such as corrosive liquids or gases, high-purity chemicals, or water. . Note that, in FIG. 1, each plastic tube 7a constituting the tube bundle 7 is not shown.

The sleeves 6 are attached to the outer periphery of both ends of the bundle 7 of plastic tubes, and as shown in FIG. 2, the end openings of the sleeves 6 are formed into a honeycomb shape by heat fusion or the like. has been done.

The bundle of tubes 7 is placed on a buttful plate 5 arranged at appropriate intervals within the shell 1.
By inserting a, the midway portion is held.

As shown in FIG. 3, this baffle plate 5 is a circular plate having an outer circumference that is approximately the same as the inner circumference of the shell 1, and has an oval communication hole 5a for passing fluid and a diameter that is approximately the same as the diameter of the tube 7a. It has a comb-shaped slit 5b with the same width and one end opened on the outer periphery of the buff-full plate 5, and a plurality of holes 5c formed on the outer periphery. Then, the buffful plates 5 are fitted from the outside into the tube bundle 7 whose ends have been formed so that the tubes 7a are almost evenly arranged in each slit 5b, and further, the buffful plates 5 are opened at the outer peripheral edge of the buffful plates 5. A rod-shaped fixing rod 8 made of stainless steel or the like is inserted into the plurality of holes 5c, and a portion of the fixing rod 8 is inserted between each buffle plate 5 and between the buffle plates 5 on both sides and the split link 9. Insert a tube (not shown). This fixes the position of each baffle plate 5 attached to the fixing rod 8.

In addition, Fig. 4 shows the double plate 5 of Fig. 3.
FIG. 2 is a cross-sectional view taken along line A-A in a state in which the shell 1 is placed inside the shell 1. This buff-full plate 5 is arranged such that the oval-shaped communication holes 5a are arranged vertically alternately in the shell, and the width of the slit 5b is approximately equal to the outer diameter of the plastic tube 7a, so that the buff-full plate 5 There is almost no gap between the plastic tubes 7a inserted through the slits 5b, but between the buffled plates 5, there is a gap between the plastic tubes 7a corresponding to the gaps between the slits 5b. occurs.

Next, the action will be explained.

This tube-shell type heat exchanger connects a supply pipe and a discharge pipe for a fluid flowing through a bundle of tubes 7 to end caps 2 on both sides of a shell 1, and connects a fluid supply pipe and a discharge pipe for flowing a fluid to a bundle of tubes 7 from the end cap 2 on the supply port side to the end caps 2 on both sides of the shell 1. An inflow pipe and an outflow pipe for supplying fluid to the bundle 7 and discharging it through the end cap 2 on the discharge port side, and for flowing the fluid into the shell 1 through the inflow shell nozzle 1b and the outflow shell nozzle 1c of the shell 1. Heat exchange is performed between the tube side fluid and the shell side fluid by connecting the shell side fluid supplied from the inflow shell nozzle 1b along the inside of the shell 1 and discharging it from the outflow shell nozzle 1c. let

In this case, a buff-full plate 5 is arranged at a predetermined interval in the middle of the shell 1, and the slit 5b provided in the buff-full plate is
Since the width thereof is approximately equal to the outer diameter of the plastic tube 7a, the gap between the buffle plate 5 and the plastic tube 7a is small. Furthermore, a plastic tube 7a is inserted into the slit 5b with almost no gap. Therefore,
The amount of fluid flowing through the gap between the slit 5b and the plastic tube 7a is small, and the fluid flowing inside the shell 1 passes through the communication hole 5a and flows toward the outflow shell nozzle 1c. The plurality of battle plates 5 arranged in the shell are
Since the positions of the communication holes 5a are arranged alternately in the upper and lower positions, the fluid flowing in the shell 1 can flow through the communication holes 5 provided in each buttful plate 5.
The fluid flowing through the shell 1 and the tube 7 become turbulent by flowing through the tube 7.
The contact time with a becomes longer and the heat exchange efficiency improves.

Further, corresponding to the spacing between the slits 5b of the buffle plate 5, gaps are created between the tubes 7a inserted through different slits 5b. This allows the fluid to flow between the tubes 7a, allowing the fluid to come into contact with each tube 7a,
Since the contact area between the fluid and the tube 7a is increased, heat exchange efficiency is improved.

In addition, if the heat exchanger is used continuously for a certain period of time, the inner surfaces of the shell 1 and tube 7a, and the tube 7a may become damaged.
Scale contained in the fluid may adhere to the surface of a, reducing the heat exchange efficiency. In this case, it is necessary to remove this mud and scale. In this case, in order to clean each tube bundle 7 one by one, it is easier to remove the tube bundle 7 from inside the shell and remove the buttful plate 5 from the tube bundle 7. Since the buff-full plate 5 can be removed from the tube bundle 7 by simply pulling out the tube 7a from the open end of the slit 5b provided in the tube 5, the work efficiency is good.
Also, when attaching the buttful plate 5 to the tube bundle 7, the tubes 7a can be attached directly to the slits 5b.
The middle part of can be inserted.

In this embodiment, a type of buff-full plate was used in which the diameter of the tube 7a and the width of the slit 5b opened in the buff-full plate were equal; A type in which the width of the slit 5b is large and the fluid flows through an orifice between the tube 7 and the buffle plate 5 may be adopted.

Furthermore, in the embodiment, each slit 5
Although the slits 5b are made parallel to form the comb-like shape, the slits 5b do not necessarily have to be parallel, and may be opened radially, for example.

[Effect of idea]

As explained above, in the present invention, the heat exchanger has a plurality of tubes arranged inside the shell, and the middle part of the tube is inserted into the slit made in the buff-full plate from the open end. It is held tightly. Therefore, gaps can be created between the tubes inserted through different slits, so the fluid flowing in the shell can come into contact with these tubes by flowing through the gaps between the tubes. Heat exchange efficiency between the fluid flowing inside the shell and the fluid flowing inside the tube can be improved. Further, when disassembling and assembling this heat exchanger, the midway portion of the tube can be directly inserted into and removed from the slit of the buff-full plate, so that work efficiency can be improved.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the heat exchanger, Figure 2 is a perspective view of the tube inserted into the sleeve, Figure 3 is a front view of the buttful plate, and Figure 4 is the tube inserted into the shell. The enlarged view in FIG. 5 shows a buff-full plate used in a conventional heat exchanger. 1...Ciel, 5...Batsuful plate, 5b
... Slits, 7... Bunch of tubes, 7a... Tubes.

Claims (1)

[Scope of utility model registration request] In a heat exchanger in which a tube bundle made up of a plurality of tubes through which a fluid passes is inserted into a shell, a bundle plate having a plurality of slits with one end open to the outer periphery is placed in the shell, A heat exchanger characterized in that the tube is inserted into the slit at an appropriate interval so as to intersect with the flow direction of the fluid, thereby supporting the middle portion of the tube.