WO2008080262A1

WO2008080262A1 - A self-cleaning enhanced heat transfer device inside a tube

Info

Publication number: WO2008080262A1
Application number: PCT/CN2006/003819
Authority: WO
Inventors: Weimin Yang; Libo Geng; Hua Yan; Yumei Ding; Wei Huang
Original assignee: Beijing University Of Chemical Technology
Priority date: 2006-12-31
Filing date: 2006-12-31
Publication date: 2008-07-10
Also published as: CN101506611A; CN101506611B

Abstract

A self-cleaning enhanced heat transfer device inside a tube comprises multiple rotary members (2) mounted inside a heat transfer tube (1). A fixing frame (3) is mounted at each end of the heat transfer tube (1). A supporting shaft (4) passes through the heat transfer tube (1) and the two ends of the supporting shaft (4) are fixed at the fixing frames (3). The rotary members (2) are pivotally mounted at the supporting shaft (4). A limiting member (5) is mounted between at least a pair of adjacent rotary members (2) for separating the ends of the adjacent rotary members (2).

Description

Self-cleaning and enhanced heat transfer device in tube

The invention relates to a device for enhancing heat transfer and self-cleaning in a heat transfer tube of a shell-and-tube heat exchange device, and the device can be widely applied to the shell of the thermoelectric power generation, petrochemical, food, pharmaceutical, light industry, metallurgy, shipbuilding and the like industries. In the heat exchange equipment and the reaction equipment, especially the self-cleaning and heat-increasing device in the tube capable of intensifying heat transfer and on-line cleaning, which is powered by the fluid in the heat transfer tube. Background technique

The inner wall of the heat transfer tube of the shell-and-tube heat exchanger is prone to scale after a period of use, and the fouling causes the heat transfer efficiency to decrease and the fluid flow resistance to increase, thereby increasing the energy cost and production cost of the enterprise, and more serious. It is scale formation and can also form scale corrosion, which causes safety hazards and shortens the service life of heat transfer equipment. And the shutdown of the cleaning will affect the normal production, thus reducing production efficiency.

In the existing method of enhanced heat transfer and on-line cleaning, the spiral twist band method uses the fluid kinetic energy as a driving force to rotate the twisted belt to achieve the purpose of online cleaning and enhanced heat transfer. In the Chinese utility model patent No. ZL 95236063. 2, a cleaning device for descaling and anti-scaling in a heat transfer tube is disclosed, which is composed of a spiral twisted belt installed in the heat transfer tube, and the radial dimension of the twisted belt is smaller than The inner diameter of the heat transfer tube is provided with an axial fixing frame at the inlet end of the heat transfer tube medium, and a flow hole is arranged in the middle portion thereof, and a shaft hole is arranged in the head of the axial fixing frame, a pin shaft is arranged in the shaft hole, and the tail end and the twist of the pin shaft With connection. Chinese Patent Application No. CN 1424554 discloses a Han turbulent spiral enhanced heat transfer and automatic descaling device. In addition to a spiral twist band and a fixed frame, the spiral twist band is disposed in the spiral tube. The spiral twisted belt is rotated by the fluid flow in the spiral tube.

The devices mentioned in the above two patents have certain enhanced heat transfer effects and on-line cleaning capabilities, and are industrially applied in specific fields. However, since the lengths of the spiral twisted belts of the two self-cleaning and strengthening heat transfer devices are substantially equal to the heat transfer tubes, as an integral insert, the local twisting of the twisted belt during use may result in the smooth rotation of the entire twisted belt. , and its dynamic torque is insufficient. In addition, both devices use one The holders are connected and the one end is free to swing. Although the outer diameter of the twisted belt is smaller than the inner diameter of the heat transfer tube, due to the different amplitudes of the radial swing of the entire spiral twisted belt, the spiral twisted belt will cause unevenness of the dirt and scratches the wall of the heat transfer tube. The structural characteristics of such devices determine that they can only be applied in high-flow, short-tube heat transfer applications.

In order to solve the above problems, the inventors have proposed a rotor type self-cleaning enhanced heat transfer device (publication number CN 2833494), which consists of a rotor, a fixed frame, a steel wire and a support tube, and the fixed frame is mounted on the heat transfer tube. At the end, the steel wire passes through the shaft hole of the fixing frame, so that the rotor is arranged along the axis of the heat transfer tube, and the rotor performs a rotary motion under the impact of the fluid, thereby achieving the purpose of enhancing heat transfer and online cleaning. The technology can effectively clean the dirt and has no wear on the pipe wall, and has the characteristics of wide application range and strong adaptability, but there are problems such as mutual interference and mutual friction between the rotor and the rotor, resulting in uneven rotor speed in the heat transfer tube. More serious will cause the rotor at the exit of the heat transfer tube to stop rotating, losing its function of enhancing heat transfer and self-cleaning. Moreover, the difference in rotor speed also causes severe wear between the rotor and the rotor, which shortens the service life of the rotor. In addition, the winding connection of the steel wire to the fixed frame also brings inconvenience to the on-site installation. Summary of the invention

The technical problem to be solved by the present invention is to provide a self-cleaning and intensifying heat transfer device in a tube, which effectively solves the problem of insufficient power of the heat transfer enhancement and on-line self-cleaning technology in the existing heat transfer tube, inconvenient installation on the site, and mutual wear and interference between the rotating parts. Such problems, in order to extend the service life of the rotating parts, enhance its enhanced heat transfer and self-cleaning effect, and broaden the application range of online automatic cleaning and enhanced heat transfer technology.

The technical solution adopted by the present invention is as follows: A self-cleaning and intensifying heat transfer device in a tube, comprising a plurality of rotating members disposed in the heat transfer tube, and fixing frames at both ends of the heat transfer tube, and fixing on the fixing frame Supporting a support shaft passing through the heat transfer tube, the plurality of rotating members having a central hole through which the support shaft passes, the central hole having an aperture slightly larger than a shaft diameter of the support shaft, so that the plurality of rotating members are rotatable Supported on the support shaft, and at least between a pair of adjacent rotating members is provided with a limiting member that separates adjacent ends of the pair of rotating members, the limiting member is fixed on the supporting shaft, The limit member rotates the plurality of —J 'The knife is divided into two or more sets of rotating parts.

In the present invention, a stopper may be provided between the rotating member and the fixing frame.

In the present invention, there may be only one rotating member in one of the rotating member groups, or two or more rotating members.

In the present invention, a convex-concave fitting structure is provided between one end portion of the limiting member and the rotating member adjacent to the end portion.

In the present invention, the convex-concave fitting structure includes a projection formed on one of the stopper and the rotary member and a groove formed on the other side to engage the projection.

In a rotating member set having two or more rotating members, a mating convex-concave fitting structure is provided between adjacent end faces of adjacent rotating members. In this example, the adjacent end faces of the adjacent rotating members are respectively provided with connecting portions protruding from the end faces and having a radial dimension smaller than the radial dimension of the end faces, and the convex-concave fitting structure is formed on the two protruding connections. And, when the convex-concave fitting structure is matched, the two adjacent end faces are separated by the two connecting portions, thereby eliminating frictional interference between the end faces of the adjacent rotating members.

In the present invention, the convex-concave fitting structure between the two adjacent rotating members may include a convex portion formed on one of the two adjacent rotating members and a concave portion formed on the other side to cooperate with the convex portion. groove.

As an optional embodiment, the shape of the protrusion may be a cylindrical shape, a circular table shape or a semi-spherical shape, and the groove may be a cylindrical groove, a truncated groove or a hemispherical groove.

In the present invention, the axial distance defined between the limiting members at both ends of the rotating member group is slightly larger than the length of the rotating member group, so that the rotating members of the rotating member group and the rotating member and the p-position member There is an axial gap between them, and a liquid film can be formed in the axial gap when rotating, thereby self-lubricating, thereby reducing mutual friction between the components, reducing wear and improving the service life of the rotating member. .

In the invention, the holder has two or more flow holes in the axial direction, and the total area of the flow holes is equal to or larger than the inner cross-sectional area of the heat transfer tubes so that the medium smoothly flows into the heat transfer tubes. The center of the holder has a shaft hole concentric with the heat transfer tube, and the support shaft is fixed by the shaft end fixing member through the shaft hole. No, at the same time prevent relative displacement of the holder and the heat transfer tube.

The shaft end fixing member may be a convex nod which is formed by directly tying the support shaft or is a clip, a rivet or the limiting member.

In the invention, a filter cover is formed on the fixing frame at the inlet end of the medium, and the flow area of the filter cover is equal to or larger than the flow area of the heat transfer tube.

In the invention, the support shaft is made of stainless steel wire or stainless steel wire or a flexible polymer material. In the invention, the rotating member may be a rotor, a segmented twisted belt, a segmented spiral or a combination of several rotating members, or the like.

In the present invention, the limiting member has a central hole through which the support shaft passes, and the limiting member is fixed to the support shaft by plastic deformation of the central hole after being passed through the support shaft.

In the in-pipe self-cleaning and strengthening heat transfer device of the present invention, the tubular medium flows into the heat transfer tube through the axial flow hole of the fixing frame, and the rotating member rotates around the support shaft under the action of the fluid, and the rotating member can scrape the rotating motion. The dirt of the heat transfer tube wall is rubbed, and the gap between the rotating member and the tube wall is impacted by the fluid at high speed, which effectively destroys the condition of the scale formation and prevents the dirt from depositing on the inner wall of the heat transfer tube. The rotating motion of the rotating member under the action of the fluid causes the medium in the heat transfer tube to be replaced a plurality of times, and continuously disturbs the boundary layer of the inner wall boundary of the heat transfer tube, thereby simultaneously achieving enhanced heat transfer.

The invention is applicable to the shell-and-tube heat exchange equipment, including the horizontal heat exchanger and the vertical heat exchanger, the condenser, and the like, where the inner wall of the heat transfer tube is easy to scale.

The rotating member of the invention can be made of polymer material, ceramic, composite material or metal material, and can be formed by injection, molding, machining, welding, etc., and the material or molding method is determined by the physical properties of the heat transfer tube medium. . The holder is made of plastic or stainless steel. Rotating parts made of high molecular materials are also characterized by low cost, corrosion resistance, high temperature resistance and aging resistance.

The in-tube self-cleaning and strengthening heat transfer device of the present invention divides the rotating member into a plurality of groups by using a limiting member, so that the rotating member between different groups has no influence, and the influence of the rotating member in the group is extremely small, so that the maximum is The interference between the rotating parts is reduced, and sufficient turning torque is obtained, which not only prolongs the service life of the rotating parts, but also reduces the difficulty of assembly and field installation, and improves the transmission of the rotating parts. The self-cleaning technology runs reliably and enhances the enhanced heat transfer and self-cleaning effects of the heat exchange equipment. The device has many advantages of cleaning dirt more thoroughly, enhancing heat transfer effect, higher safety factor, more convenient installation and wider application range, and is particularly suitable for technical transformation of existing shell-and-tube heat exchange equipment. In addition, the rotating member is automatically rotated under the impact of the water flow to automatically find the rotating member, so that the rotating member does not wear the heat transfer tube, thereby effectively ensuring the safe operation of the device. In addition, the grouping method of the present invention allows the rotation of the rotating member to be related only to the flow velocity of the medium, and is independent of the length of the heat transfer tube, thereby greatly expanding the application and range of the enhanced heat transfer and self-cleaning technology of the rotating member. DRAWINGS

Figure 1 is a schematic view showing the structure of a self-cleaning heat-increasing device in the tube of the present invention;

Figure 2 is a schematic structural view of a rotating member of the present invention;

Figure 3 is a schematic end view of Figure 2;

Figure 4 is a schematic structural view of the fixing frame of the present invention;

Figure 5 is a side view of Figure 4;

Figure 6 is a schematic view showing the cooperation structure between the rotating members and between the rotating member and the limiting member; Figure 7 is another structural schematic view of the limiting member;

8 is a schematic structural view of a self-cleaning and strengthening heat transfer device in a tube with a filter cover according to the present invention; FIG. 9 is a schematic view showing a matching structure of the fixed frame and the limiting member in FIG. 8';

Figure 10 is a schematic view showing the structure of the filter cover of the present invention;

Figure 11 is a schematic view showing the end face structure of Figure 10;

Figure 12 is a schematic view showing another structure of the self-cleaning heat-increasing device in the tube of the present invention. detailed description

As shown in FIG. 1 to 12, the in-tube self-cleaning and strengthening heat transfer device of the present invention comprises a plurality of rotating members 2 disposed in the heat transfer tube 1, and a fixing frame is disposed at both ends of the heat transfer tube 1 through a socket connection. 3, a support shaft 4 passing through the heat transfer tube 1 is fixedly supported on the fixing frame 3, and the plurality of rotating members 1 Lifting a central hole 21 through which the support shaft passes, the diameter of the central hole 21 being slightly larger than the shaft diameter of the support shaft 4, so that the plurality of rotating members 2 are rotatably supported on the support shaft 4, and at least in a pair of phases A limiting member 5 for separating adjacent ends of the pair of rotating members 2 is disposed between the adjacent rotating members 2, and the limiting member 5 is fixed on the supporting shaft 4, and the limiting member 5 is used for the plurality of The rotating members 2 are divided into two or more sets of rotating members 20. Thus, the rotating member 2 is divided into a plurality of groups by the limiting member 5, so that the rotating member 2 between the different groups has no influence, thereby reducing the interference between the rotating members 2, obtaining a sufficient rotational torque, and not only extending the rotation. The service life of the piece 2, and enhanced heat transfer and self-cleaning effect of the heat exchange equipment. In addition, the grouping method of the present invention allows the rotation of the rotating member 2 to be related only to the flow velocity of the medium, regardless of the length of the heat transfer tube 1, so that the application and range of the enhanced heat transfer and self-cleaning technique of the rotating member 2 are greatly expanded.

As shown in FIG. 1 , in the present invention, a limiting member 5 may be disposed between the rotating member 2 and the fixing frame 3 to separate the rotating member 2 from the end surface of the fixing frame, thereby avoiding the rotating member 2 Interference with the holder 3 when rotating.

In the present invention, one of the rotating member sets 20 may include only one rotating member 2, and may also include two or more rotating members 2. In the tube self-cleaning and strengthening heat transfer device, a plurality of rotating member groups 20 may be included, and the rotating member groups 20 may have the same number of rotating members 2, or may have different numbers of rotating members 2, respectively, and the specific arrangement manner may be It is determined by actual needs, and is not specifically limited in the present invention. Fig. 1 shows only one example in which each set of rotating members 20 includes three rotating members 2.

In the present invention, as a specific example, as shown in FIG. 12, a stopper 5 may be disposed between each two adjacent rotating members 2, so that each set of rotating members 20 separated by the limiting member 5 is There is only one rotating member 2. such. When the respective rotating members 2 are rotated, since they are all separated by the limiting members 5, the plurality of rotating members 2 do not interfere with each other, thereby further reducing the frictional interference between the rotating members 2 and prolonging the service life of the rotating members 2.

In the present invention, as shown in FIG. 6, a convex-concave fitting structure may be provided at least between one end portion 51 of the stopper member 5 and the rotating member 1 adjacent to the end portion 51. The convex-concave fitting structure may include a convex portion 71 formed on one of the limiting member 5 and the rotating member 2, and the convex portion formed on the other side ^ Fitted groove 72. In this way, when the rotating member 2 rotates rapidly under the impact of the fluid medium, the radial runout of the rotating member 2 can be restricted by the cooperation of the rotating member 2 with the convex portion 71 and the groove 72 of the limiting member 5. It facilitates the automatic centering of the rotating member 2, thereby avoiding the scraping of the rotating member 2 and the heat transfer tube 1 and the support shaft 4, thereby ensuring the safety of the heat exchange device.

In the present invention, as shown in Figs. 1 and 6, the structure has two or more rotating members. As an optional example, the adjacent end faces of the adjacent rotating members 2 may be respectively provided with connecting portions 22 protruding from the end faces and having a radial dimension smaller than the radial dimension of the end faces of the rotating members 2, the convex-concave fitting structure Formed on the two protruding connecting portions 22, so that when the convex-concave fitting structure is matched, the two adjacent end faces are separated by the two connecting portions 22, thereby reducing the friction between the end faces of the adjacent rotating members 2. interference.

In the present invention, the convex-concave fitting structure includes a boss portion 73 formed on one of the two adjacent rotating members 2 and a recess 74 formed on the other side to cooperate with the boss portion 73. In this way, when the rotating member 2 rotates rapidly, the radial movement of the rotating member 2 can be restricted by the cooperation of the convex portion 73 and the groove 74 between the adjacent rotating members 2, so that the rotating member 2 can be automatically found. Thereby, the scraping of the rotating member 2 and the heat transfer tube 1 and the support shaft 4 is avoided, and the safety of the heat exchange device is ensured.

As shown in Fig. 6, a case where the boss portion 11 at one end of the rotary member 2 is provided with the boss portion 73 and the other portion of the connecting portion 22 is provided with the recess 74 is shown. The rotating member 1 can also be provided with a convex portion 73 on the connecting portions 22 at both ends, and the adjacent ends of the two adjacent rotating members 2 adjacent to the two ends are respectively provided as grooves 74. To form a convex-concave fitting structure between adjacent rotating members 2. As shown in Fig. 6, for the convenience of manufacture, all of the rotating members 2 have a structure in which one end has a convex portion 73 and one end has a groove 74, regardless of whether or not a convex-concave fitting structure is required. Of course, it is also possible to provide the fitting projections 73 and the grooves 74 only at the two adjacent end portions of the rotary member 2 requiring the male and female fitting, as long as a convex-concave fitting structure can be formed between the rotary members 2. For the limiting member 5, as shown in FIG. 6, only one end is provided with a groove 72 to cooperate with the convex portion 71 on the rotating member 2; as shown in FIG. 7, in the limiting member 1 One end is provided with a convex portion 71, and the adjacent rotating member 2 is engaged with the convex portion A groove 72 is provided on the end of the ^1 neighbor. Alternatively, a structure that cooperates with the rotating member 2 may be disposed at both ends of the limiting member 5, for example, both ends are provided with a convex portion 71 or both ends are provided with a groove 72 or one end is provided with a convex portion 71. The other end is provided with a groove 72, so that both ends of the limiting member 5 can form a convex-concave fitting structure with the adjacent rotating member 2.

In the present invention, the shape of the protrusions 71, 73 may be a cylinder, a truncated cone or a semi-spherical shape, etc., and the grooves 72, 74 are also corresponding to a cylindrical groove, a truncated groove or a hemispherical concave. Slots, etc. Of course, the convex portions 71, 73 and the grooves 72, 74 may also be other shapes not listed, as long as the convex-concave fit can be formed and the rotation of the rotating member 2 is not affected, and the specific shape thereof is not specifically described in the present invention. limit. As an example, an example in which the shape is a truncated cone shape is shown in the drawings of the present invention.

In the present invention, as shown in FIG. 1, FIG. 8, FIG. 12, the axial distance defined between the limiting members 5 at both ends of the rotating member group 20 is slightly larger than the length of the rotating member group 20, so that the rotating member There is an axial gap between the rotating members 2 of the set 20 and between the rotating member 2 and the limiting member 5. Thus, a liquid film can be formed in the axial gap during rotation to provide self-lubricating action, thereby reducing mutual friction between the components, reducing wear, and further improving the service life of the rotating member. In FIG. 1 and FIG. 2, since the axial gap is relatively small, in order to facilitate the indication of the axial gap, the position between the one end of the limiting member 5 and the rotating member 2 is exaggeratedly shown. gap.

The convex-concave coupling structure formed between the above-mentioned rotating members 2 and between the rotating member 2 and the limiting member 5 of the present invention can function to limit the radial runout of the rotating member 2 and to form a liquid film to achieve self-lubrication.

In the invention, as shown in FIG. 4 and FIG. 5, the fixing frame 3 has two or more flow holes 32 in the axial direction, and the total area of the flow holes 32 is equal to or larger than the inner cross-sectional area of the heat transfer tube 1. , so that the medium flows smoothly into the heat transfer tube. The fixing frame 3 has a shaft hole 31 concentric with the heat transfer tube 1 at the center, and the support shaft 4 is restrained on the fixing frame 3 by the shaft end fixing member 8 through the shaft hole 31, and the fixing frame 3 and the heat transfer tube are prevented. 1 Relative displacement occurs. The shaft end fixing member 8 can be a convex nod which is formed by directly tying the support shaft 4 or is a clip, a rivet or the limiting member, etc., as shown in FIG. 1, FIG. 8 and FIG. The shaft end fixing member 8 is an example of the limiting member, but the shaft end fixing member 8 is not limited to the above-listed form, and other existing shaft end fixing methods may be employed as long as the supporting shaft can be supported. 4 The constraint is fixed on the fixing frame 3, and the specific structure thereof is not limited.

In the invention, as shown in FIG. 8, FIG. 10, FIG. 11, according to the case of entering the medium of the heat transfer tube 1, a filter cover 9 may be stuck on the fixing frame 3 at the inlet end of the medium to filter the medium shield. . In order to ensure the smoothness of the medium, the flow area of the filter cover 9 is greater than or equal to the flow area of the heat transfer tube 1.

In the invention, the support shaft 4 may be made of stainless steel wire or stainless steel wire or a flexible polymer material. The rotating member 2 may be a rotor, a segmented twisted belt, a segmented spiral or a combination of several rotating members, and the like. The number, type, and length of the rotating member 1 included in one of the rotating member sets 20 can be determined according to actual needs.

In the present invention, the plurality of rotating members 2 are supported in the heat transfer tubes 1 by means of fixing the support shafts 3 to the fixing frame 3, which reduces assembly and field installation compared with the existing in-tube self-cleaning enhanced heat transfer device. Difficulty, improved the reliability of the rotating parts to enhance heat transfer and self-cleaning technology.

In the present invention, as shown in FIG. 6 and FIG. 7 , the limiting member 5 has a central hole 55 through which the supporting shaft 4 passes. After the limiting member 5 is disposed on the supporting shaft 4 , It is fixed to the support shaft 4 by plastic deformation, thereby functioning as an axial limit.

In the in-tube self-cleaning and strengthening heat transfer device of the present invention, the tubular medium flows into the heat transfer tube 1 through the axial flow hole 32 of the fixing frame 3, and the rotating member 1 rotates around the support shaft 4 under the action of the fluid, and rotates. The rotary motion of the member 2 can scrape the dirt on the wall of the heat transfer tube 1 and impact the wall of the tube through the fluid at a high speed in the gap between the rotating member 2 and the tube wall, thereby effectively destroying the condition of the scale formation and preventing the dirt from depositing on the inner wall of the heat transfer tube 1. Thereby, the heat transfer tube 1 is self-cleaning. Under the action of the fluid, the rotational movement of the rotating member 2 causes the medium in the heat transfer tube 1 to be displaced a plurality of times, and continuously disturbs the boundary layer of the inner wall boundary of the heat transfer tube 1, thereby simultaneously achieving enhanced heat transfer.

The self-cleaning and intensifying heat transfer device in the tube of the invention is suitable for the shell-and-tube heat exchange equipment, including the horizontal heat exchanger and the vertical heat exchanger, the condenser, and the like, where the inner wall of the heat transfer tube is easy to scale.

The rotating member 2 of the present invention can be made of a polymer material, a ceramic, a composite material or a metal material, and can be formed by injection, molding, machining, welding, etc., using materials or molding methods by the medium of the heat transfer tube 1 medium. Nature determines. The holder 3 is made of plastic or stainless steel. Adopt The rotating piece 2 made of meat knife material also has the characteristics of low cost, corrosion resistance, high temperature resistance, anti-aging and the like. The self-cleaning enhanced heat transfer device of the present invention can be assembled in the following manner: the support shaft 4 passes through the shaft hole 31 of the fixing frame 3, the center hole 21 of the rotating member 2, and the center hole 55 of the limiting member 5, so that the fixing frame 3 is distributed at one end of the support shaft 4, and is fixed by the limiting member 5 constituting the shaft end fixing member 8, and the rotating member 2 is distributed on the supporting shaft 4, according to the actual situation, the rotating member 1 is divided into different parts by the limiting member 5. The number of groups. The center hole 55 of the stopper 5 passes through the support shaft 4, and is fixed to the support shaft 4 by plastic deformation of the center hole 55. Then, the device is inserted into the heat transfer tube 1 at one end where the fixing frame 3 is not mounted, and after the fixing frame 3 and the heat transfer tube 1 are inserted and fixed, the support shaft 4 is further inserted into the fixing frame 3 at the other end. Similarly, the limiting member 5 is fixed to the heat transfer tube 1, and finally the filter cover 9 is restrained by the buckle 91 on the fixing frame 3 at the inlet end of the medium. ·

The above-described embodiments are merely illustrative of the invention and are not intended to limit the invention.

Claims

Claim

What is claimed is: 1. A self-cleaning and enhanced heat transfer device in a tube, comprising: a plurality of rotating members disposed in a heat transfer tube, wherein: a fixing frame is arranged at two ends of the heat transfer tube, and the fixing frame is fixedly supported on the fixing frame Passing through the support shaft of the heat transfer tube, the plurality of rotating members have a central hole through which the support shaft passes, the central hole has an aperture slightly larger than the shaft diameter of the support shaft, and the plurality of rotating members are rotatably supported by And a limiting member separating the adjacent ends of the pair of rotating members at least between a pair of adjacent rotating members, the limiting member being fixed on the supporting shaft by the limit The piece divides the plurality of rotors into two or more sets of rotating parts.

2. The in-tube self-cleaning enhanced heat transfer device according to claim 1, wherein the limiting member is provided between the rotating member and the fixing frame.

3. The in-tube self-cleaning enhanced heat transfer device according to claim 1, wherein in said one rotating member group, there is only one rotating member or two in one of said rotating member groups or More than two rotating parts.

The in-tube self-cleaning and heat-strengthening heat transfer device according to claim 1, wherein the end portion of the limiting member and the rotating member adjacent to the end portion are provided with a convex-concave fitting structure, The convex-concave fitting structure includes a convex portion formed on one of the stopper and the rotating member and a groove formed on the other side to cooperate with the convex portion.

5. The in-tube self-cleaning enhanced heat transfer device according to claim 3, wherein in the rotating member group having two or more rotating members, two adjacent ones of the adjacent rotating members A matching convex-concave fitting structure is disposed between the end faces, and the convex-concave fitting structure includes a convex portion formed on one of the two adjacent rotating members and a groove formed on the other side to cooperate with the convex portion.

The self-cleaning and intensifying heat transfer device according to claim 2, wherein an axial distance defined between the limiting members at both ends of the rotating member group is slightly larger than a length of the rotating member group, so that the rotating

7. The in-tube self-cleaning enhanced heat transfer device according to claim 1, wherein said solid The wood has two or more orifices in the axial direction, and the total area of the orifices is equal to or larger than the inner cross-sectional area of the heat transfer tubes.

8. The self-cleaning and enhanced heat transfer device in a pipe according to claim 1, wherein the center of the fixing frame has a shaft hole concentric with the heat transfer tube, and the support shaft passes through the shaft hole and is fixed by the shaft end. Constrained on the holder.

9. The self-cleaning and intensifying heat transfer device in a tube according to claim 8, wherein the shaft end fixing member is a convex nodule formed by directly tying the support shaft or is a clip, a rivet or The limiting member.

10. The self-cleaning and intensifying heat transfer device according to claim 1, wherein a filter cover is disposed on the fixing frame at the inlet end of the medium, and the flow area of the filter cover is equal to or larger than a flow area of the heat transfer tube.

11. The in-tube self-cleaning enhanced heat transfer device of claim 1 wherein the rotating member is a rotor, a segmented twisted band or a segmented helix, or a combination thereof.

12. The in-tube self-cleaning enhanced heat transfer device according to claim 1, wherein the limiting member has a central hole through which the support shaft passes, and the limiting member is disposed on the support shaft. , fixed to the support shaft by plastic deformation of the center hole.