JPH025278Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention uses a plastic tube heat exchanger using a plastic tube as a heat transfer tube, for example, as a shell-and-tube heat exchanger or as a solvent recovery device. The present invention relates to a mounting structure for a plastic tube heat exchanger that enables low cost and reliable sealing and fixing when the plastic tube heat exchanger is mounted through the wall of the container for use.

[Conventional technology]

Traditionally, heat exchangers have been used to heat or cool corrosive liquid or gas atmospheres in plating tanks, degreasing tanks, various reaction tanks, etc., and more recently, to heat ultrapure water used in semiconductor manufacturing factories. As the heat tube, a corrosion-resistant metal tube such as a stainless steel steam tube, or a plastic tube made of a chemical-resistant polymer material such as a fluororesin or a polyolefin synthetic resin is used.

Incidentally, although the latter heat exchanger using plastic tubes has a structure in which a large number of ultra-thin plastic tubes are bundled, although the thermal conductivity of the material itself is inferior to that of metal, the transmission per unit volume is low. It has a large thermal area and can be made smaller and lighter. Among them, plastic tubes made of fluororesin (for example, Japanese Patent Publication No. 43-3851) are chemically inert to corrosive liquids such as strong acids and strong alkalis, or organic solvents, and are non-adhesive. It is especially suitable for manufacturing high-purity products because it is resistant to scale and sludge and allows for stable heat exchange, and since there is no elution of harmful substances into the liquid in the liquid tank or the fluid in the plastic tube. Optimal.

Such a plastic tube heat exchanger is used by being fixed to a liquid tank or the like by a method appropriately selected depending on the purpose of use, the fluid to be heat exchanged, or the type of heat exchange fluid. For example, in the case of plating, etc., the end joint is fixed at the top of the liquid tank, and the plastic tube bundle is immersed in the liquid in a U-shape and used in an open state.

On the other hand, when handling harmful vapors such as when recovering organic solvents, it is necessary to prevent leakage and volatilization of organic solvents, so the plastic tube bundle is placed in the lower part of the container, and its terminal end is It has a mounting structure in which it is attached so as to protrude from the container, and the mounting portion is sealed to be in a hermetically sealed state.

In addition, manufacturing processes take into account the contamination and volatilization of impurities, such as heating ultrapure water used in the semiconductor cleaning process at semiconductor manufacturing factories, or heating or cooling chemicals during the manufacturing process at chemical factories. If it is required to be installed in a line and perform continuous heat exchange, for example, the plastic tube bundle of the heat exchanger is placed inside a cylindrical container, and each end is attached to both ends of the container. It is widely used in the form of a so-called shell-and-tube heat exchanger, in which the plastic tube bundle is folded back and attached and sealed, and at least two or more fluid inlets and outlets are provided on the container side. There is.

As this type of mounting structure, for example,
Publication No. 21469 discloses that a split washer (split ring) is placed on the outer circumferential surface of a flanged core (sleeve) where Teflon tube bundles are collected at the end, and is positioned between the extraction nozzle and the flanges, and a connecting pipe joint (terminal joint) is installed. ) is fixed to the mounting nozzle with a tightening bolt, and the seal packing provided on the inner peripheral surface of the joint is pressed into contact with the flange,
A tube bundle attachment portion of a heat exchanger using a Teflon tube bundle is disclosed in which a seal packing therefor is brought into pressure contact with the attachment nozzle by a threaded ring screwed onto the outer peripheral surface of the joint.

However, in this configuration in which a male thread is provided on the flange of the connecting pipe joint, and the seal packing is pressed into contact with the flange on the container side by the threaded ring screwed onto the male thread and the flange to seal the seal, the number of parts is large; Moreover, since the machining of the connecting pipe joint is complicated, there is a drawback that the cost for the mounting portion increases. In addition, in this usage method, it is required that the mounting structure not only provides a highly reliable seal and a fixed state, but also be easy to install and remove from the standpoint of assembly and maintenance work. Therefore, a mounting structure that requires a large number of parts is not preferable.

Further, Japanese Patent Publication No. 45-35951 discloses a shell-and-tube heat exchanger using a plastic tube bundle as the heat transfer tube. In such a plastic tube bundle mounting structure, the seal between the tension collar and its outer flange is achieved by an O-ring fitted in an annular groove provided on the outer circumferential surface of the tension collar. No particular seal ring is provided between the sleeve and the tensioning collar disposed outside the sleeve, and the sleeve is configured to seal at their contact surfaces. Sealing between the respective members is achieved by compression force in the axial direction of the sleeve by a plurality of retaining bolts for fixing the sleeve to the barrel. However, in such a configuration, compressive force only in the axial direction of the sleeve does not apply force in the radial direction of the sleeve. The drawback was that the sealing properties were not sufficient.

[Problem that the invention attempts to solve]

This idea was developed in view of the above-mentioned drawbacks of the conventional technology, and is useful when installing a plastic tube heat exchanger by penetrating the wall of a container such as a liquid tank, or when using a shell-and-tube type heat exchanger. , its purpose is to provide a mounting structure that enables highly reliable sealing with a simple structure.

[Means for solving problems]

This invention was made in order to solve the above-mentioned problems of the prior art, and therefore, according to this invention, a plastic tube comprising a bundle of plastic tubes whose end portions are integrally fused with a flanged sleeve and arranged in a honeycomb shape is provided. When a tube heat exchanger is placed inside a container and a flanged sleeve is attached to the flange on the container side, one surface abuts the inner end surface of the flange of the flanged sleeve, and the other surface abuts the container side flange. The split ring is held between the split ring and the container-side flange, and is pressed against the container-side flange via the first seal ring, and the flange of the flange sleeve is provided on the inner peripheral surface of the through hole that receives the flange sleeve. a support plate which has a protrusion facing the outer end surface of the container side end surface of the protrusion portion and presses against the outer end surface of the flange of the flanged sleeve via a second seal ring; a first locking means for locking to the support plate, a flanged end joint for supplying fluid to the heat exchanger by pressure contacting the support plate via a third seal ring, and a flanged end joint for supplying fluid to the heat exchanger. and second locking means for locking to the support plate.

In this configuration, the protrusion of the support plate is provided at the tip of the through hole on the side of the flanged end joint, and
For example, if a flanged cylindrical liner made of a chemical-resistant polymer material formed to cover the protrusion and the end face of the flanged end joint is used as the third seal ring, heat exchange of corrosive fluids is possible. When carrying out this process, it prevents impurities from entering due to corrosion of the support plate, and since there is very little chemical change, the sealing performance between the support plate and the flanged end joint is maintained well over a long period of time. be done.

[Effect]

According to this invention, as described above, when a plastic tube heat exchanger is placed inside a container and the end portion is installed by penetrating the wall surface of the container, or as a shell and tube heat exchanger, the end portion is attached to the flange of the container. When attaching to a container, etc., use a split ring whose one surface is in contact with the inner end surface of the flange of the flanged sleeve and the other surface is in contact with the container-side flange, and the container is held between the split ring and the container-side flange. The inner circumferential surface of the through hole that is pressed against the side flange via the first seal ring and that receives the flanged sleeve has a protrusion that faces the outer end surface of the collar of the flanged sleeve, and the container of this protrusion a support plate whose side end surface is pressed into contact with the outer end surface of the collar of the flanged sleeve via a second seal ring; a first locking means for locking the support plate to the container side flange;
A flanged end joint for supplying fluid to the heat exchanger by press-fitting the support plate via a third seal ring, and a second locking means for locking the flanged end joint to the support plate. The structure is simplified compared to the conventional example, and the seal between the support plate and the container-side flange and the seal between the support plate and the flanged sleeve are
The support plate is brought into pressure contact with the container side flange by the first locking means via the first seal ring and the second seal ring arranged between the respective members, and the support plate is sealed at the same time. The compressive force in the axial direction causes each seal ring to act effectively, resulting in a highly reliable mounting structure, as well as an economical mounting structure due to reduced mounting member costs and improved mounting work efficiency. Also,
Since the mounting structure is simple, removal work is also easy, and maintenance and inspection work is also improved.

Furthermore, the plastic tube heat exchanger is made of a chemical-resistant material such as fluororesin, and a liner made of a similar polymeric material is formed to cover the protrusion of the support plate and the end face of the flanged end joint. If used as a third seal ring, when a heat exchange fluid such as ultrapure water is passed through the heat exchanger, there will be no elution or contamination of impurities from the heat exchanger, making it possible to produce products with high purity. Optimal.
Furthermore, since the support plate is not corroded when a corrosive fluid is passed through it, good sealing performance is maintained.

〔Example〕

FIG. 1 is a partial sectional view showing the mounting structure when a plastic tube heat exchanger is applied to a shell-and-tube heat exchanger, and FIG. 2 is an overall view thereof.

The mounting structure of this plastic tube heat exchanger is made of, for example, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA).
A plastic tube heat exchanger 3 having a sealed structure in which the ends of a plastic tube bundle 1 consisting of It is arranged in the container 10 so as to protrude from the container side flange 11, and one surface 21 is in contact with the inner end surface of the flange 4 of the flange sleeve 2, and the other surface 22 is in contact with the inner end surface of the flange 4 of the flange sleeve 2. A split ring 20 is provided that contacts the flange surface of the container-side flange 11, and the first seal ring 40 is attached to the container-side flange 11 while the outer edge of this split ring 20 is held between the flange surface of the container-side flange 11. A through hole 31 that is pressed into contact with the flanged sleeve 2 through the through hole 31 and receives the flanged sleeve 2.
has a protruding part 32 facing the outer end face of the flanged sleeve 2 at the tip of the inner circumferential surface opposite to the container; A support plate 30 is provided which is pressed into contact with the second seal ring 41, and the support plate 30 and the container side flange 11 are tightened and fixed with bolts 33.
Further, a flanged end joint 50 is provided for supplying fluid to the plastic tube heat exchanger 3 by being pressed into contact with the support plate 30 via a third seal ring 42, and this flanged end joint 50 and the support plate 30
It has a structure in which it is fixed by tightening it with a bolt 51.

Figure 2 is an overall view of the plastic tube heat exchanger 3 installed in a container (shell) as a shell-and-tube type heat exchanger.
A plastic tube heat exchanger 3 is disposed in a cylindrical container 10 having fluid inlets and outlets 12 and 13 at different locations and flanges 11 at both ends, and has flanges fused to both ends of the plastic tube bundle. The sleeve 2 is fixed to the flange 11 using a support plate 30 as shown in FIG. 1, and a flanged end joint 50 is connected to the support plate 30.

In addition, in this embodiment, considering chemical resistance etc., a flanged end joint 50 is used as shown in FIG.
A lining layer 52 made of a chemical-resistant polymer material such as tetrafluoroethylene resin is provided on the inner circumferential surface and the flange portion of the support plate 30 and the flange portion. A liner made of PFA formed into a flanged cylindrical shape is also used to cover the end surface of the end joint, and the flange portion 43 of this liner seals and holds the space between the support plate 30 and the flanged end joint 50. It is configured to do this. In this case, the liner is pre-formed, softened by heating, and fitted into a predetermined position. At this time, a gasket 45 is inserted between the flange portion 43 and the end surface of the support plate 30 to improve sealing performance. Further, a gasket 53 is similarly provided on the flange portion of the flanged end joint 50.

Therefore, when passing ultrapure water or the like as a heat exchange fluid through the plastic tube heat exchanger 3,
Since the contact surface is made of a chemically inert polymer material, the elution and contamination of impurities are prevented, making it possible to produce products with high purity. Furthermore, since it is inert to corrosive fluids, the reliability of the seal portion is greatly improved.

Furthermore, if the liner is made of a chemical-resistant polymeric elastic material such as fluororubber, the gaskets 45 and 53 can be
Sufficient sealing performance can be obtained without using.

In this configuration, the seal between the support plate 30 and the container-side flange 11 and the seal between the support plate 30 and the flanged sleeve 2 are provided by the first seal ring disposed between the respective members. 40 and the second seal ring 41, the support plate 30 is brought into pressure contact with the container side flange 11 by tightening the bolts 33, so that the support plate 30 is sealed.
Each seal ring works effectively due to the compressive force in the axial direction of the support plate, resulting in a highly reliable mounting structure. Furthermore, since the structure is simpler and the installation is easier than the conventional one, it becomes an economical installation structure.

Although not shown, instead of using a liner as in the above embodiment as the third seal ring, for example, an annular groove may be provided on the end surface of the support plate 30 on the flanged end joint side or on the flange surface of the flanged end joint 50. The annular groove may be provided with an O-ring for sealing, or a gasket made of an elastic material may be provided between the support plate 30 and the flange surface of the flanged end joint 50 for sealing.

[Effect of idea]

As explained above, according to this invention, when a plastic tube heat exchanger is placed inside a container and its end portion is attached to the flange of the container, one surface is in contact with the inner end surface of the flange of the flanged sleeve. A split ring whose other surface is in contact with the container-side flange, and a through-hole which presses against the container-side flange via the first seal ring while the split ring is held between the container-side flange and receives the flanged sleeve. The inner peripheral surface of the hole has a protrusion that faces the outer end surface of the flange of the flanged sleeve, and the container-side end surface of this protrusion is pressed against the outer end surface of the flange of the flanged sleeve via a second seal ring. a first locking means for locking the support plate to the container-side flange; a flanged end joint press-fitted to the support plate via a third seal ring; Since it is constructed with a second locking means for locking the end joint to the support plate, each seal ring can work effectively and a highly reliable seal structure can be achieved. Furthermore, since the number of parts is small and the flanged end joint can be a commercially available product, the cost of the mounting members can be reduced and the mounting work can be simplified, resulting in an economical mounting structure.

Furthermore, since the removal work can be easily performed, maintenance and inspection work are also facilitated, which is extremely effective in practical terms.

Note that this invention is not limited to the above-mentioned embodiments; for example, changes may be made to the locking means of the container side flange and the flanged end joint, the material of the plastic tube, the shape of the seal ring, etc. Various modifications within the technical concept are of course possible.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing the mounting structure of a plastic tube heat exchanger according to this invention, and FIG. 2 is an overall view thereof. 1: Plastic tube bundle, 2: Flange sleeve, 10: Container, 20: Split ring, 30: Support plate, 32: Projection, 40: First seal ring,
41: second seal ring, 42: third seal ring, 50: flanged end joint.

Claims (1)

[Claims for Utility Model Registration] (1) A plastic tube heat exchanger comprising a bundle of plastic tubes whose end portions are integrally fused with a flanged sleeve and arranged in a honeycomb pattern is arranged in a container, and the flanged sleeve is In the case of attachment at the container side flange part, a split ring whose one surface abuts the inner end surface of the collar of the flanged sleeve and the other surface abuts the container side flange, and this split ring is held between the container side flange. The through hole is pressed against the container side flange via the first seal ring and receives the flanged sleeve, and the through hole has a protruding portion facing the outer end surface of the collar of the flanged sleeve on the inner circumferential surface thereof. a support plate that presses the container-side end surface of the protruding portion against the outer end surface of the flange of the flanged sleeve via a second seal ring; and a first locking means for locking the support plate to the container-side flange. a flanged end joint for press-fitting the support plate via a third seal ring to supply fluid to the heat exchanger; and a second flanged end joint for locking the flanged end joint to the support plate. A mounting structure for a plastic tube heat exchanger comprising a locking means. (2) In the mounting structure for the plastic tube heat exchanger described in claim 1 of the utility model registration claim, the protrusion of the support plate is provided at the tip of the through hole on the flanged end joint side, and The third seal ring is made of a flanged cylindrical liner formed to cover the protrusion and the end face of the flanged end joint, and the flange portion of this liner connects the support plate and the flanged end joint. A mounting structure for a plastic tube heat exchanger characterized by sealing and holding a space between the plastic tube heat exchanger and the plastic tube heat exchanger.