JP2012072923A - Shell and tube type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an increase in the number of tubes per a unit area in a cross section in a shell even if a titanium material is used for manufacturing.SOLUTION: The shell and tube type heat exchanger includes: a tube (40) in which a first heat exchange fluid (51) flows, a shell (20) which houses the tube (40) and allows a second heat exchange fluid (52) to flow outside the tube (40); a plurality of baffles (41) arranged along the length direction of the shell (20) at proper intervals, for alternately closing a half of the cross section, in the shell (20); and a tube plate (44) which holds both ends of the tube (40). Each of the baffles (41) is bonded and fixed to a rod member (47) extending in the same direction as the length direction of the tube (40) using an inorganic glass-based sealing agent (70). The tube plate (44) is configured by bonding and fixing the rod member (47) and the tube (40) using the inorganic glass-based sealing agent (70).

Description

  The present invention relates to a shell and tube heat exchanger. In particular, the present invention relates to a shell-and-tube heat exchanger that can arrange a large number of tubes accommodated in a narrow space even when manufactured using a thin tube heat transfer tube that is difficult to weld, and can efficiently exchange heat.

Conventionally, as shown in Patent Document 1 and Patent Document 2, a plurality of tubes through which the first heat exchange fluid flows, and the second heat exchange fluid including the plurality of tubes and passing outside the plurality of tubes. And a shell and tube heat exchanger configured to include
There are a plurality of baffle plates inside the shell. The baffle plate has a shape that closes a substantially semicircular portion of a cross section perpendicular to the longitudinal direction of the shell, and the plurality of baffle plates have appropriate shapes in the longitudinal direction of the shell so as to alternately close the semicircular portions. Arranged and fixed through a gap.

  Therefore, the first heat exchange fluid flows in each of the plurality of tubes. On the other hand, the second heat exchange fluid flows between the plurality of tubes in a zigzag manner by the plurality of baffle plates in the shell. At this time, heat is exchanged between the first heat exchange fluid and the second heat exchange fluid.

The shell and tube type heat exchanger described above is made of a metal whose tube is made of an alloy such as carbon steel, stainless steel, titanium, aluminum, or copper. Further, the plurality of tubes, the plurality of baffle plates, the shell, and the like are assembled by, for example, welding or brazing.

Japanese Patent Laid-Open No. 9-61071 Japanese Patent Laid-Open No. 8-200804

In a shell-and-tube heat exchanger, a thin tube with a small diameter is sometimes used for the heat transfer tube (tube) in order to reduce the size and improve the heat exchange efficiency. This is because an increase in the heat transfer area and an improvement in the heat transfer coefficient can be achieved while maintaining the overall dimensions by using a large number of thin tube heat transfer tubes.
On the other hand, the use of a large number of capillaries also causes problems. The first is an increase in manufacturing cost due to an increase in welding or brazing locations, and the second is a decrease in corrosion resistance due to a small corrosion margin of thin thin tubes.
In addition, when the primary side heat exchange fluid and the secondary side heat exchange fluid are pure water or ultrapure water, the third problem is that metal ions are eluted from the heat transfer tube, shell surface, and brazing brazing material. As a result, the purity level is lowered. In particular, metal ion elution from the brazing material is large.

Therefore, in order to solve the second and third problems, a method of manufacturing and welding a shell and a heat transfer tube with a titanium material has been taken.
Titanium heat transfer tubes can solve the problem of deterioration of pure water purity caused by corrosion and metal ion elution. However, it is a metal material that is difficult to process and weld, and it is difficult to assemble a large number of thin tubes by welding, which requires man-hours and processing time. Therefore, it is difficult to increase the number of tubes in a small-diameter shell, and it is difficult to improve the heat exchange efficiency.

  The problem to be solved by the present invention is that the purity of pure water or ultrapure water does not decrease, and in order to prevent corrosion, even if it is manufactured using a titanium material, the cross section in the shell per unit area It is possible to increase the number of tubes. In particular, an object of the present invention is to provide a shell-and-tube heat exchanger that can improve the heat exchange efficiency even in a small-diameter shell.

(First invention)
The second invention in the present application includes a plurality of tubes (40, 40, 40,...) Through which the first heat exchange fluid (51) flows, and the plurality of tubes (40, 40, 40,...). A shell (20) for storing the second heat exchange fluid (52) flowing outside the plurality of tubes (40, 40, 40,...), And in the longitudinal direction inside the shell (20). A plurality of baffles (41, 41,...) Arranged at appropriate intervals in the longitudinal direction of the shell (20) in order to alternately close substantially half of the cross section perpendicular to the opposite ends of the plurality of tubes (40) And a shell-and-tube heat exchanger (10) having a tube plate (44, 44) for holding the heat exchanger.
Each of the baffles (41, 41, ...) has a plurality of tube holes (42, 42, 42, ...) so that the tubes (40, 40, 40, ...) can be inserted.・) Is formed.
The plurality of tubes (40, 40, 40, ...) are inserted into the plurality of tube holes (42, 42, 42, ...) in each of the baffles (41, 41, ...). And both ends of the plurality of tubes (40, 40, 40, ...) are supported by being inserted into a plurality of tube holes (45) formed in the tube plate (44, 44). The configuration is as follows.
Further, the plurality of baffles (41, 41, ...) are inorganic glass-based to a plurality of rod members (47, 47) extending in the same direction as the longitudinal direction of the tubes (40, 40, 40, ...). Adhering and fixing with a sealing agent (70), the tube plate (44, 44), the plurality of rod members (47, 47) and the plurality of tubes (40, 40, 40, ...). Adhesive and fixed with an inorganic glass sealant (70).

(Glossary)
The “inorganic glass-based sealing agent” contains at least an alkoxysilane compound or a partially hydrolyzed condensate thereof and a curing catalyst. The present inventor has found that it is solventless, has extremely low viscosity and surface tension in the monomer state, and can penetrate even fine pores and cracks of about 1 μm. In the permeation process, the inorganic polymer is formed and cured, so that each component can be fixed without welding.

(Function)
All the tubes (40, 40, 40, ...) are inserted into the plurality of tube holes (42, 42, 42, ...) of the baffles (41, 41, ...), and the tube plate (44, 44) has the plurality of rod members (47, 47) and the plurality of tubes (40, 40, 40,...) Bonded and fixed with an inorganic glass-based sealing agent (70). . That is, it is an assembly structure assembled without welding. There is little influence of thermal stress, thermal strain, etc. on the tube (40) generated by welding and brazing.
Therefore, the dimensional accuracy of the plurality of tubes (40, 40, 40,...), The plurality of tube plates (44, 44), and the plurality of baffles (41, 41,. This makes it possible to assemble many small diameter tubes (40). As a result, the heat exchange efficiency of the shell-and-tube heat exchanger (10) can be improved without increasing the outer dimensions.
In addition, when the inorganic glass-based sealing agent (70) is cured, it becomes an inorganic polymer and does not elute into water, so the pure water level does not decrease.
In addition, the structure fixed by the inorganic glass-based sealing agent (70) may improve the production efficiency as compared with the method of fixing by welding.

(Variation 1 of the first invention)
The second invention can also provide the following variations.
That is, the rod member holes (43, 43, 43, ..) for inserting the plurality of rod members (47, 47) into the tube plate (44, 44) and the plurality of baffles (41, 41,. ..) to the rod member (47, 47) inserted in the rod member hole (43, 43, 43, ...), the tube plate (44, 44) and the plurality of baffles (41, 41) ,... May be bonded and fixed with an inorganic glass-based sealing agent (70).

(Function)
By inserting a plurality of rod members (47, 47) into a plurality of rod member holes (43, 43, 43, ...) formed in the plurality of baffles (41, 41, ...) The baffles (41, 41,...) Are supported in a stable state by a plurality of rod members (47, 47). Therefore, each baffle (41) is securely bonded and fixed to the rod member (47) by the inorganic glass sealing agent (70).

(Second invention)
The second invention in the present application has a configuration in which the plurality of rod members (47, 47), which are essential constituent elements in the first invention, are omitted.
That is, the plurality of tubes (40, 40, 40,...) Through which the first heat exchange fluid (51) flows and the plurality of tubes (40, 40, 40,...) A shell (20) for flowing a second heat exchange fluid (52) flowing outside the tube (40, 40, 40, ...), and a cross section perpendicular to its longitudinal direction inside the shell (20) A plurality of baffles (41) arranged at appropriate intervals in the longitudinal direction of the shell (20) in order to close almost half alternately, and both ends of the plurality of tubes (40, 40, 40, ...) are held. A tube-and-tube heat exchanger (10) comprising a tube plate (44, 44),
The plurality of tubes (40, 40, 40, ...) are inserted into and supported by a plurality of tube holes (42) formed in the plurality of baffles (41), and all the tubes ( 40, 40, 40, ...) is configured to be supported by inserting both ends of each tube hole (45) formed in the tube plate (44, 44), and the plurality of baffles (41, 41,...) Are configured to be bonded and fixed to at least two tubes (40, 40) with an inorganic glass-based sealing agent (70), and the tube plates (44, 44) include the plurality of tubes The tube (40) is configured to be bonded and fixed with an inorganic glass-based sealing agent (70).

(Function)
In addition to the operational effects of the first invention, the second invention has the following effects.
That is, a plurality of tubes (40, 40, 40, ...) are transferred to a plurality of baffles (41, 41, ...) and tube sheets (44, 44) with an inorganic glass-based sealing agent (70). The structure is bonded and fixed, so that sufficient strength can be secured and the rod members (47, 47) can be omitted. Therefore, the number of component components is reduced, contributing to weight reduction and size reduction.

(Variation 2 of the first invention and Variation 1 of the second invention)
The first invention and the second invention can also provide the following variations.
That is, it is preferable that the gap between the target members to be bonded and fixed with the inorganic glass-based sealing agent (70) is larger than 5 μm and smaller than 500 μm.

(Function)
When the gap between the target members is larger than 5 μm and smaller than 500 μm, an appropriate adhesive force can be obtained by the inorganic glass-based sealing agent (70).

(Variation 3 of the first invention and Variation 2 of the second invention)
The first invention and the second invention can also provide the following variations.
That is, the ratio of the inner cross-sectional area St of all the tubes (40, 40, 40,...) To the inner cross-sectional area Sc of the shell (20) is 0.2 to 0.3 and per unit area of 1 cm 2. The number of tubes (40) is preferably 7-9.

(Function)
By providing a large number of tubes (40) per unit area of 1 square centimeter in the ratio of 7 to 9 in the shell (20), the heat exchange efficiency is improved.

(Variation 4 of the first invention and Variation 3 of the second invention)
The first invention and the second invention can also provide the following variations.
That is, the shell (20), the tube (40, 40, 40, ...), the tube plate (44, 44), the baffle (41, 41, ...) and the rod member (47, 47) Is preferably made of a titanium material.

(Glossary)
“Titanium material” includes pure titanium and a titanium alloy.

(Function)
The heat exchanger (10) can be made of a titanium material because it has a structure that minimizes distortion when assembling each member. As a result, the heat exchanger (10) made of titanium material is less likely to elute impurities even if the first heat exchange fluid (51) and the second heat exchange fluid (52) are pure water or ultrapure water. Is. In particular, in the case of ultra pure water, pure titanium is desirable.

According to the first to sixth aspects of the invention, even if the titanium material is used, the number of tubes per unit area can be increased in the cross section in the shell. Therefore, it has been possible to provide a shell-and-tube heat exchanger that can improve the heat exchange efficiency in both a small-diameter shell and a large-diameter shell.
In addition, the manufacturing efficiency of the shell and tube heat exchanger can be improved. Further, it is a technique that can be applied to a material having a low heat-resistant temperature due to a process that does not require heating, such as welding or brazing.

It is a front view including the principal part cross section of the shell and tube type heat exchanger of embodiment of this invention. It is sectional drawing of the arrow II-II line | wire of FIG. 3A to 3C are perspective views showing an assembly process of the shell-and-tube heat exchanger. It is a perspective view which shows the assembly process following FIG.3 (C). It is a perspective view which shows the assembly state of the shell and tube type of other embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the shell and tube heat exchanger 10 according to the embodiment of the present invention includes a plurality of tubes 40, 40, 40,. A shell 20 that houses a plurality of tubes 4040, 40, 40,... And flows a second heat exchange fluid 52 that flows outside the tubes 4040, 40, 40,. A plurality of baffles 41, 41 arranged at appropriate intervals in the longitudinal direction of the shell 20 in order to alternately close substantially half of a cross section perpendicular to the longitudinal direction, and tubes holding both ends of the plurality of tubes 40 And plates 44, 44.
In the following description, the part numbers are not repeated for the sake of simplicity.

The shell 20 has a cylindrical body, and in this embodiment, has a cylindrical shape. A first inlet 22 into which the first heat exchange fluid 51 flows is provided at one end side in the longitudinal direction (right end side in FIG. 1). On the other hand, a first outlet 24 through which the first heat exchange fluid 51 flows out is provided on the other end side in the longitudinal direction of the shell 20 (left end side in FIG. 1).
Further, a second inlet 26 into which the second heat exchange fluid 52 flows is provided on the outer periphery of the shell 20 so as to be located near the first outlet 24. On the other hand, a second outlet 28 through which the second heat exchange fluid 52 flows out is provided near the first inlet 22.

This will be described in more detail.
A tubular body 27 having a second inlet 26 is integrally attached by welding 60 so as to communicate with a through hole provided at the above position on the outer periphery of the cylindrical shell body 21. On the other hand, the pipe body 29 having the second outlet 28 is integrally attached by welding 60 (not shown in FIG. 1) so as to communicate with the through hole provided at the above position on the outer periphery of the shell body 21. Yes.

Further, inside the shell 20, the tube plate 44 that holds the right ends of the plurality of tubes 40 in FIG. 1 is positioned on the right side of the second outlet 28 and the second outlet 28 and the first inlet 22. Is closed and fixed to the inner peripheral surface of the shell 20 with a weld 61. On the other hand, although not shown in FIG. 1, in the same manner as described above, the tube plate 44 holding the left ends of the plurality of tubes 40 in FIG. The inner peripheral surface of the shell 20 is closed and fixed with a weld 61 so as to block between the two inlets 26 and the first outlet 24. Each member on the left side is shown in FIGS. 3 and 4.
Accordingly, the first inflow port 22 and the inflow ports of the plurality of tubes 40 communicate with each other, and the outflow ports of the plurality of tubes 40 and the first outflow port 24 communicate with each other.

As shown in FIGS. 1 and 4, stepped portions 31 for fitting the tube sheet 44 are formed on the inner peripheral surfaces of both ends of the shell main body 21. The tube plate 44 fitted into the stepped portion 31 and the edge of the shell main body 21 are integrally fixed by the entire circumference welding 61.
Further, the tube body 23 having the first inflow port 22 is integrally attached to the right end of the shell main body 21 by the all-around welding 61 so as to communicate with the inflow ports of the plurality of tubes 40 exposed on the tube plate 44. ing. On the other hand, the tubular body 25 having the first outlet 24 is integrally attached to the left end of the shell main body 21 by a circumferential weld 61 so as to communicate with the outlets of the plurality of tubes 40 exposed on the tube plate 44. ing.

  In addition, the inside of the shell 20 is arranged at appropriate intervals in the longitudinal direction of the shell 20 such that the plurality of baffles 41 alternately close substantially semicircular portions of a cross section perpendicular to the longitudinal direction of the shell 20. ing.

With the above configuration, the first heat exchange fluid 51 flows from the first inflow port 22 on one end side in the longitudinal direction of the shell 20 through the inflow port of each tube 40, and flows from the outflow port of each tube 40 to the shell 20. It flows to the first outlet 24 on the other end side in the longitudinal direction. On the other hand, the second heat exchange fluid 52 flows into the shell 20 from the second inlet 26 on the outer periphery of the shell 20. The second heat exchange fluid 52 flows outside the tubes 40 in the shell 20 in the direction opposite to the flow direction of the first heat exchange fluid 51 in the tubes 40. Moreover, it is guided by the plurality of baffles 41, passes between the plurality of tubes 40, and flows through the shell 20 in a zigzag manner.
In the process, the first heat exchange fluid 51 and the second heat exchange fluid 52 are heat exchanged. The heat exchanged second heat exchange fluid 52 flows to the second outlet 28 on the outer periphery of the shell 20.

  Next, the assembly structure and method of the shell-and-tube heat exchanger 10 of this embodiment will be described in detail.

  As shown in FIGS. 3A and 3B, each baffle 41 includes a plurality of tube holes 42 into which the tubes 40 can be inserted, and a plurality of rods into which a plurality of rod members 47 can be inserted. A member hole 43 is formed. Further, as shown in FIG. 3C, the tube plate 44 includes a plurality of tube holes 45 into which the tubes 40 can be inserted and a plurality of rod member holes 46 into which a plurality of rod members 47 can be inserted. Is formed.

The plurality of tubes 40 are inserted into and supported by a plurality of tube holes 42 formed in the plurality of baffles 41 as shown in FIG. Further, as shown in FIG. 3B, the plurality of baffles 41 are inserted into the rod member holes 43 by inserting a plurality of rod members 47 extending in the same direction as the longitudinal direction of the tube 40, respectively. The structure is supported by the plurality of rod members 47.
Further, both ends of the plurality of tubes 40 are inserted into and supported by a plurality of tube holes 45 formed in the tube plate 44. Further, the plurality of rod members 47 are supported by inserting both ends thereof into the rod member holes 46 of the tube plate 44. In FIG. 3, two rod members 47 are used.

  In the assembling method, a plurality of tubes 40 are inserted into the respective tube holes 42 of the baffle 41 as shown in FIG. Further, as shown in FIG. 3B, the two rod members 47 are also inserted into the rod member holes 43 of the baffle 41. In the same manner, as shown in FIG. 3C, the two rod members 47 and the plurality of tubes 40 are arranged in a plurality of baffles 41 so that the plurality of baffles 41 are alternately arranged in a vertically symmetrical position. Plug in. The plurality of baffles 41 are disposed at predetermined positions with appropriate intervals in the longitudinal direction of the two rod members 47 and the plurality of tubes 40.

  Next, the left ends of the plurality of tubes 40 in FIG. 4 are inserted into the plurality of tube holes 45 of the tube plate 44. The two rod members 47 are also inserted into the two rod member holes 46 of the tube plate 44 at one end on the left side in FIG. As shown in FIG. 4, the end portions of the two rod members 47 and the rod member holes 46 of the tube plate 44 are bonded and fixed by an inorganic glass-based sealing agent 70. Next, the rod member holes 43 and the rod members 47 of the plurality of baffles 41 are bonded and fixed by the inorganic glass-based sealing agent 70.

Next, the inorganic glass-based sealing agent 70 will be described in detail.
In this embodiment, the inorganic glass-based sealing agent 70 contains at least an alkoxysilane compound or a partial hydrolysis condensate thereof and a curing catalyst. It can also contain inorganic pigments. It is solvent-free and has a characteristic of permeating into fine pores of about 1 μm while substituting air due to low viscosity and surface tension. Accordingly, in the permeation process, the alkoxysilane that has absorbed water in the air gradually reacts with the water to form an inorganic polymer and is cured. The inorganic polymer polymerized and cured here is 100% glass, that is, silicon oxide, and does not contain organic groups such as carbon.

  In general, the inorganic glass-based sealing agent 70 is used for the purpose of forming a film excellent in corrosion resistance and rust prevention on the surface of a material, like a paint. It is used for the purpose of bonding and fixing the target member. The target members are the tube 40, the tube plate 44, the baffle 41, and the rod member 47.

  There are many micron-order micropores on the surface of materials such as metals. That is, there are many microscopic holes on the surface of the target member to be bonded and fixed. When the inorganic glass-based sealing agent 70 is applied so as to flow into the gap between the two target members, the alkoxysilane penetrates into the micropores of each target member and cures to become an inorganic polymer to block the micropores. Become. The inorganic polymer penetrates and cures as if the roots of the tree are firmly rooted in the soil into the micropores on the surface of the two target members. The Rukoto.

  In addition, inorganic polymers do not elute in water. Further, since the inorganic glass-based sealing agent 70 is solvent-free and can be easily used, the manufacturing efficiency of the heat exchanger 10 can be increased.

If the gap between the target members to be bonded and fixed is S, the gap S may be larger than 5 μm and smaller than 500 μm in order to obtain an appropriate adhesive force by the inorganic glass-based sealing agent 70. preferable. That is, it is preferable that 5 μm <S <500 μm.
For example, when the outer dimension of the tube 40 is d and the outer dimension of the tube hole 45 of the tube plate 44 is D, D-d is preferably larger than 5 μm and smaller than 500 μm. That is, it is preferable that 5 μm <(D−d) <500 μm. In this case, if the tube 40 is evenly inserted into the tube hole 45 of the tube plate 44, the gap S becomes (D−d) / 2, but usually a deviation occurs. It is possible to reliably obtain an appropriate adhesive force.

From the above, the tube plate 44 on one end side and the plurality of baffles 41 are positioned, bonded, and fixed to the two rod members 47 by the inorganic glass-based sealing agent 70. On the other hand, the tube holes 42 and the plurality of tubes 40 of the plurality of baffles 41 are not fixed by the inorganic glass-based sealing agent 70. That is, the plurality of tubes 40 are held by the tube holes 45 of the tube plate 44 and the tube holes 42 of the plurality of baffles 41.
However, since the bonding and fixing method using the inorganic glass-based sealing agent 70 is less affected by distortion or the like on the target member to be bonded, the tube 40 is bonded and fixed to the tube hole 42 of the baffle 41 with the inorganic glass-based sealing agent 70. You may do it.

Note that the end of each of the baffles 41 may be positioned and bonded and fixed to the rod member 47 with the inorganic glass-based sealing agent 70, so that the above-described rod member hole 43 is not necessarily formed in each baffle 41. It does not have to be.
However, by inserting the rod members 47 into the rod member holes 43 of the plurality of baffles 41, the plurality of baffles 41 are supported in a stable state by the plurality of rod members 47. Therefore, it is desirable to provide the rod member hole 43 in that each baffle 41 is securely bonded and fixed to the rod member 47 by the inorganic glass sealing agent 70.

  The plurality of tubes 40 assembled as described above are inserted into the shell main body 21 from one end side (right end side in FIG. 4). The tube sheet 44 is fitted into the stepped portion 31 at the left end of the shell body 21. The right end side of the plurality of tubes 40 and the two rod members 47 in FIG. 4 protrudes from the right end of the shell body 21. The right ends of the plurality of protruding tubes 40 and the two rod members 47 are inserted into the plurality of tube holes 45 and the two rod member holes 46 of the other tube plate 44. And the said tube sheet 44 is engage | inserted by the step part 31 of the right end in FIG.

As shown in FIG. 1, both ends of the shell body 21 and each tube plate 44 are integrally fixed by welding 61 on the entire circumference. Next, both end edges of each of the plurality of tubes 40 are bonded and fixed to the tube holes 45 of the tube plates 44 with an inorganic glass-based sealing agent 70. The right ends of the two rod members 47 are bonded and fixed to the rod member hole 46 of the tube plate 44 by an inorganic glass sealing agent 70.
Accordingly, the tube plates 44 and the baffles 41 at both ends holding the plurality of tubes 40 are bonded and fixed to the plurality of rod members 47 by the inorganic glass-based sealing agent 70 instead of welding. There is little influence of the thermal distortion etc. which are given to the tube 40 by such welding or brazing.
In addition, the both ends of the shell main body 21 and each tube sheet 44 may be integrally bonded and fixed with the inorganic glass-based sealing agent 70 by changing the entire circumference to the above-described weld 61.

  Next, the tube body 23 having the first inflow port 22 is integrally attached to the right end of the shell main body 21 by the all-around welding 61 as shown in FIG. On the other hand, the tubular body 25 having the first outlet 24 is integrally attached to the left end of the shell main body 21 by the all-around welding 61 as shown in FIG.

From the above, in the shell-and-tube heat exchanger 10, the plurality of tubes 40 are inserted and held in the tube holes 45 formed in the tube plates 44 at both ends and the tube holes 42 formed in the plurality of baffles 41. This is an assembly structure that is assembled without being fixed to the plurality of baffles 41. In addition, since the tube plates 44 and the baffles 41 at both ends holding the plurality of tubes 40 are bonded and fixed to the plurality of rod members 47 with the inorganic glass-based sealing agent 70, the distortion applied to the tubes 40, etc. The influence can be reduced.
As a result, since the dimensional accuracy of the plurality of tubes 40, the plurality of tube plates 44, and the plurality of baffles 41 can be improved, a large number of thin and small diameter tubes 40 can be assembled.
In addition, when the inorganic glass-based sealing agent 70 is cured, the inorganic glass-based sealing agent 70 becomes an inorganic polymer and does not elute into water, so that the purity level is not lowered. Further, since the inorganic polymer is 100% glass-based, it has excellent heat resistance and excellent corrosion resistance against chemicals such as strong acid and exhaust gas.
Moreover, since the manufacturing and fixing method of the adhesive fixing method using the inorganic glass-based sealing agent 70 is improved as compared with a fixing method such as welding, it can be efficiently manufactured even if the number of tubes 40 is increased.

For example, the shell and tube heat exchanger 10 in which the outer diameter of the shell body 21 is 20 to 60 mm will be described as an example. The tube 40 has an inner diameter of 2 mm and a wall thickness of 0.3 mm.
When the inner diameter Dc of the shell body 21 is 18.7 mm, the number Nt of the tubes 40 is 20. Hereinafter, when Dc is 24.2 mm, Nt is 35. When Dc is 30.0 mm, Nt is 55. When Dc is 38.7 mm, Nt is 105. When Dc is 44.6 mm, Nt is 137. When Dc is 56.5 mm, Nt is 223.

In the above case, the number of tubes 40 arranged in the shell body 21 per unit area of 1 cm 2 is 7.29 to 8.89.
Further, when the inner diameter cross-sectional area of the shell body 21, that is, the cross-sectional area in the shell is Sc, and the total inner cross-sectional area of the plurality of tubes 40, that is, the inner cross-sectional area of the entire plurality of tubes is St, the cross-sectional area ratio St / Sc is Data was obtained that was in the range of 0.23 to 0.28.
Therefore, regardless of the inner diameter dimension of the tube 40, the cross-sectional area ratio St / Sc is 0.2 to 0.3, and the number of tubes per unit area of 1 cm 2 is 7 to 9 shell and tube type heat. The exchanger 10 could be manufactured.

As described above, since the number of tubes 40 per unit area in the shell 20 can be increased, the heat exchange efficiency can be improved.
In the example described above, the maximum number of tubes 40 is 223, but can be increased to, for example, 1000 or more. In that case, although the shell main body 21 becomes thick with the number of tubes 40, the heat exchange capacity of the heat exchanger 10 increases. Even if the number of tubes 40 is increased to 1000 or more, target members such as the tube 40, the tube plate 44, the baffle 41, and the rod member 47 can be efficiently bonded and fixed by the inorganic glass-based sealing agent 70. Therefore, the heat exchanger 10 can be manufactured efficiently.

For the above reason, even if the shell 20, the tube 40, the tube plate 44, the baffle 41, and the rod member 47 are made of titanium material, the heat exchanger 10 can be assembled by bonding and fixing with an inorganic glass-based sealing agent 70. Can be manufactured with high accuracy and efficiency.
In the present embodiment, the titanium material means a material containing pure titanium and a titanium alloy. For example, pure titanium is JIS type 1 and JIS type 2. On the other hand, titanium alloys include high-strength alloy type JIS 60 type, JIS 61 type, and 15-3-3-3 alloy. Furthermore, as a corrosion-resistant alloy, there are JIS type 11 and JIS type 12.

Moreover, the heat exchanger 10 made of a titanium material is less likely to elute impurities even if the first heat exchange fluid 51 and the second heat exchange fluid 52 are pure water or ultrapure water.
Note that ultrapure water has an electrical resistivity of 18 MΩcm or an electrical conductivity of 0.055 μS / cm. Since ultrapure water ionizes and elutes stainless steel, it is required to be made of pure titanium. Moreover, pure water (high level) has an electrical resistivity of 2 to 10 MΩcm or an electrical conductivity of 0.1 μS / cm. Has the ability to elute copper and nickel brazing material. Pure water (low level) has an electrical resistivity of 1 to 2 MΩcm, or an electrical conductivity of 0.5 μS / cm, and is also referred to as distilled water.

Therefore, by manufacturing the heat exchanger 10 made of titanium, it is possible to prevent corrosion and improve the exhaust heat environment, which is impossible with stainless steel.
In addition, as described above, when the inorganic glass-based sealing agent 70 for bonding and fixing the target member is cured, it becomes a 100% glass-based inorganic polymer. It does not decrease, and it has excellent corrosion resistance against chemicals and exhaust gases such as strongly acidic. Therefore, the first heat exchange fluid 51 and the second heat exchange fluid 52 can also be applied when one of the fluids is a high-temperature exhaust gas and the other fluid is air.
In addition, as said high temperature exhaust gas, there exist exhaust gas of melting furnaces, such as a gas furnace by an electric furnace, heavy oil, etc., for example. This also applies to exhaust gas discharged from other facilities. That is, the shell-and-tube heat exchanger 10 of the present application can be installed in the exhaust gas pipe.

Next, a shell and tube heat exchanger 11 according to another embodiment of the present invention will be described with reference to the drawings. The same members as those of the shell and tube type heat exchanger 10 described above are denoted by the same reference numerals, detailed description of the same parts is omitted, and different points will be mainly described.
The difference between the heat exchanger 11 of this embodiment and the above-described heat exchanger 10 is that a plurality of rod members 47 are not used, and a plurality of baffles 41 are connected to at least two tubes 40 as shown in FIG. It is to be bonded and fixed by the inorganic glass-based sealing agent 70.
Since the process of bonding and fixing with the inorganic glass-based sealing agent 70 is performed at room temperature, there is little influence of thermal strain or the like due to work, and the baffle 41 can be attached to the tube 40 without using a plurality of rod members 47. It can be adhesively fixed. As a result, the plurality of rod members 47 can be omitted, and the number of tubes 40 can be increased by arranging the tubes 40 at locations where the rod members 47 are omitted. Other configurations are the same as those of the heat exchanger 10 described above.
In addition, when the some rod member 47 is used like the above-mentioned heat exchanger 10, there exists an effect which makes the whole intensity | strength for supporting the some tube 40 high.

  The present invention has applicability in the manufacturing industry, maintenance industry, etc. of a shell and tube heat exchanger.

DESCRIPTION OF SYMBOLS 10, 11 Shell and tube type heat exchanger 20 Shell 21 Shell main body 22 First inflow port 23 Tubular body 24 First outflow port 25 Tubing body 26 Second inflow port 27 Tubular body 28 Second outflow port 29 Tubular body 31 Stepped part 40 Tube 41 Baffle 42 Tube hole 43 Rod member hole 44 Tube plate 45 Tube hole 46 Rod member hole 47 Rod member 51 First heat exchange fluid 52 Second heat exchange fluid 60 Welding 61 Welding 70 Inorganic glass sealant

Claims (6)

A plurality of tubes through which the first heat exchange fluid flows, a shell through which the plurality of tubes are accommodated and a second heat exchange fluid that flows outside the plurality of tubes, and inside the shell, perpendicular to the longitudinal direction thereof Shell-and-tube heat exchanger comprising: a plurality of baffles arranged at appropriate intervals in the longitudinal direction of the shell so as to alternately close almost half of the cross section; and a tube plate holding both ends of the plurality of tubes In
The plurality of tubes are inserted and supported in a plurality of tube holes formed in the plurality of baffles, and both ends of the plurality of tubes are inserted into a plurality of tube holes formed in the tube plate. To be supported by
The plurality of baffles are configured to adhere and fix to a plurality of rod members extending in the same direction as the longitudinal direction of the tube with an inorganic glass sealing agent, and the tube plate includes the plurality of rod members and the plurality of rod members. Shell-and-tube heat exchanger with a configuration in which the tube is bonded and fixed with an inorganic glass-based sealing agent.   A rod member hole for inserting the plurality of rod members is provided in the tube plate and the plurality of baffles, and the tube plate and the plurality of baffles are sealed in the glass member and the rod member inserted in the rod member hole. The shell-and-tube heat exchanger according to claim 1, which is adhered and fixed with an agent. A plurality of tubes through which the first heat exchange fluid flows, a shell through which the plurality of tubes are accommodated and a second heat exchange fluid that flows outside the plurality of tubes, and inside the shell, perpendicular to the longitudinal direction thereof Shell-and-tube heat exchanger comprising: a plurality of baffles arranged at appropriate intervals in the longitudinal direction of the shell so as to alternately close almost half of the cross section; and a tube plate holding both ends of the plurality of tubes In
The plurality of tubes are inserted and supported in a plurality of tube holes formed in the plurality of baffles, and both ends of the plurality of tubes are inserted into a plurality of tube holes formed in the tube plate. To be supported by
The plurality of baffles are configured to adhere and fix to at least two tubes with an inorganic glass-based sealing agent, and the tube plate is configured to bond and fix the plurality of tubes with an inorganic glass-based sealing agent. Shell and tube heat exchanger.   The shell-and-tube heat exchanger according to any one of claims 1 to 3, wherein a gap between target members to be bonded and fixed with the inorganic glass-based sealing agent is larger than 5 µm and smaller than 500 µm.   The ratio of the inner cross-sectional area of the entire plurality of tubes to the cross-sectional area in the shell is 0.2 to 0.3, and the number of tubes per unit area of 1 cm 2 is 7 to 9. The shell and tube type heat exchanger according to any one of the above.   The shell and tube heat exchanger according to any one of claims 1 to 5, wherein the shell, the tube, the tube plate, the baffle, and the rod member are made of a titanium material.

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