Shell-and-tube heat exchanger with elastic baffle plates

Abstract

The invention provides a shell-and-tube heat exchanger with an elastic baffle plate, the baffle plate is of an elastic tube bundle structure and comprises an elastic tube bundle, the elastic tube bundle comprises a plurality of arc-shaped tubes, the center lines of the arc-shaped tubes are arcs of concentric circles, the ends of the adjacent arc-shaped tubes in the radial direction are communicated at one end, and the other ends are not communicated. Therefore, the end portion of the communicated end of the tube bundle forms a free end, the arc-shaped tube on the outermost side is provided with an outer side opening end, the arc-shaped tube on the innermost side is provided with an inner side opening end, and the elastic tube bundle forms a series connection structure from the outer side opening end to the inner side opening end. The baffle plates are arranged to be of the elastic tube bundle structure, the contact area of two kinds of fluid is increased through the structure, fluid disturbance is increased, the convective heat transfer coefficient of the shell pass of the heat exchanger can be increased, and therefore the heat transfer efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to a shell and tube heat exchanger, in particular to a shell and tube heat exchanger with baffles. Background Art

[0002] Heat exchangers are indispensable equipment for heat exchange and transfer in chemical production. In the fields of petrochemicals, cryogenic refrigeration, air separation, seawater desalination, etc., it is often necessary to heat low-temperature fluids or cool high-temperature fluids, vaporize liquids into steam, or condense steam into liquids. These processes are closely related to heat transfer, and can therefore be completed through heat exchangers.

[0003] Commonly used heat exchangers include shell and tube heat exchangers and plate heat exchangers. Traditional shell and tube heat exchangers mostly use smooth tubes as heat exchanger tubes. This traditional shell and tube heat exchanger has many disadvantages compared with various new plate heat exchangers, such as low heat transfer efficiency and large heat exchanger volume; however, shell and tube heat exchangers also have many advantages of their own, such as simple manufacturing, high temperature and high pressure resistance, and easy maintenance. Therefore, it is urgent to develop a double-sided enhanced high-efficiency heat exchanger based on the traditional shell and tube heat exchanger. At present, some high-efficiency heat exchangers based on smooth tubes have appeared in China for secondary development, but they are not ideal in terms of enhanced heat transfer effect.

[0004] So far, traditional high-efficiency heat exchangers mostly use a single means of heat exchange enhancement. One is to use rough surface enhanced heat exchange tubes, and form vortex removal by improving the wall surface shape design to achieve the purpose of destroying the boundary layer and improving the heat transfer performance in the boundary layer, such as transverse groove tubes, spiral groove tubes, longitudinal groove tubes, corrugated tubes, positive rotation tubes and finned tubes. The second is to use far-wall spoiler elements to generate continuous vortices, so that the fluid in the center of the tube and the fluid in the wall boundary layer are fully mixed under the influence of centrifugal force. However, the heat exchange effect of a single means is not ideal.

[0005] The elastic tube bundle heat exchange component is a heat exchange structure first researched and developed by Shandong University. For example, the Chinese invention patents "Floating coil-heat pipe two-stage heating steam-water heat exchanger" (application number: 92106727.5) and "Elastic tube bundle steam-water heat exchanger unit" (application number: 94110563.6) propose a plane elastic tube bundle heat transfer element, which uses fluid to induce tube bundle vibration to enhance heat exchange. This tube bundle has two fixed ends and a floating mass end. The Chinese invention patent "Spatial spiral elastic enhanced heat exchange tube bundle and its supporting device" (application number: 200810015875.3) proposes a spatial spiral elastic enhanced heat exchange tube bundle. The tube bundle is divided into a single spiral type and a double spiral type. There is a floating mass block on the double spiral heat exchange tube. The working principle of the above invention is that the shell-side fluid passes through the heat exchange tube bundle, and different fluid media and different flow velocities of the fluid are used to induce the heat transfer element to achieve the required vibration, so as to meet the design requirements of the heat exchange tube bundle to achieve different vibration modes. The floating mass block is the main component of the fluid-induced vibration of the heat exchange tube and is an important part that affects the vibration mode, frequency and amplitude of the heat exchange tube bundle.

[0006] In traditional baffle shell and tube heat exchangers, bow-shaped baffles are generally used to support the tube bundle, and the material used for the bow-shaped baffles is steel plate or stainless steel plate. Traditional heat exchangers are equipped with baffles, such as bow-shaped baffles to avoid fluid short circuit, so as to achieve the purpose of enhancing heat transfer. However, although only using bow-shaped baffles can achieve the purpose of enhancing heat transfer to a certain extent, it can still be improved to further enhance heat transfer.

[0007] The present invention creatively combines the elastic tube bundle and the baffle, and sets the baffle as the elastic tube bundle structure, thereby increasing the heat exchange area and improving the convection heat transfer coefficient, thereby effectively improving the heat transfer efficiency. Summary of the invention

[0008] In order to overcome the defects and shortcomings in the prior art, the present invention provides a shell and tube heat exchanger with an elastic tube bundle baffle, in which the baffle is arranged as an elastic tube bundle structure. The above structure can increase the contact area between the two fluids, increase the heat exchange area, and improve the convective heat transfer coefficient of the shell side of the heat exchanger, thereby effectively improving the heat transfer efficiency.

[0009] In order to achieve the above object, the technical solution of the present invention is as follows: A shell and tube heat exchanger with an elastic tube bundle baffle, the shell and tube heat exchanger comprising a tube shell, a heat exchange tube, a tube-side inlet tube, a tube-side outlet tube, a shell-side inlet pipe and a shell-side outlet pipe; a heat exchange tube bundle consisting of a plurality of parallel heat exchange tubes is connected to a front tube sheet and a rear tube sheet; the front end of the front tube sheet is connected to a front end cap, and the rear end of the rear tube sheet is connected to a rear end cap; a baffle is arranged in the shell, and the heat exchange tube passes through the baffle; it is characterized in that the baffle is an elastic tube bundle structure, including an elastic tube bundle, the elastic tube bundle includes a plurality of arc tubes, the center lines of the plurality of arc tubes are concentric arcs, the outermost arc tube has an outer open end, the innermost arc tube has an inner open end, and the end of the middle arc tube is connected to an adjacent one Each arc tube forms a connecting end at one end and is not connected at the other end. The end of the middle arc tube is not connected to another adjacent arc tube at one end, and forms a connecting end at the other end, thereby forming a connecting end with a free end at one end, and the elastic tube bundle forms a series structure from the outer open end to the inner open end; each heat exchange tube is divided into multiple sections, including an edge heat exchange tube section and an intermediate heat exchange tube section, wherein one end of the edge heat exchange tube section is connected to the front tube plate or the rear tube plate to be connected with the front head and the rear head, and the other end is connected to the arc tube in the baffle, and the two ends of the intermediate heat exchange tube section are respectively connected to the arc tubes of the adjacent baffles, and the heat exchange tube includes an outer tube and an inner tube, and the outer open end and the inner open end of the elastic tube bundle are respectively connected to the outer tube and the inner tube.

[0010] As an improvement, it also includes a supporting structure, which connects the inner wall of the shell and the outermost arc tube and is used to support the baffle.

[0011] As an improvement, the supporting structure is a supporting plate, which is used to form a closed structure between the inner wall of the shell and the outermost arc-shaped tube.

[0012] As an improvement, the communication position of adjacent arc-shaped tubes is arranged at the center of the tube shell.

[0013] As an improvement, the diameters of the outer tube and the inner tube are larger than the diameters of other heat exchange tubes.

[0014] As an improvement, the shell and tube heat exchanger is a horizontal shell and tube heat exchanger, and the baffles are arranged in the up and down directions.

[0015] As an improvement, the elastic tube bundle structure is a semicircular structure.

[0016] Compared with the prior art, the present invention has the following advantages: 1) The present invention innovatively changes the baffle into an elastic tube bundle structure and adds a free end of the elastic tube bundle, so that the fluid disturbance can be increased when the fluid in the tube side impacts, thereby enhancing heat transfer and achieving a descaling effect. At the same time, the fluid in the tube can flow inside the elastic tube bundle, further impacting the free end to vibrate, thereby achieving the purpose of enhancing heat transfer and descaling. In addition, the above structure allows the baffle to be filled with tube side fluid, increasing the heat exchange area between the tube side fluid and the shell side fluid, thereby further enhancing heat transfer.

[0017] 2) By changing the arc tube spacing in the radial direction of the arc tube of the baffle, the fluid on the outside can flow to the middle as much as possible, further reducing fluid short circuit. At the same time, because the free ends of the elastic tube bundle are all in the center, the fluid can flush the free ends as much as possible to enhance heat transfer.

[0018] 3) By changing the density of the distance between the heat exchange tube and the connecting part of the arc tube, the free end of the connecting part can vibrate freely as much as possible to enhance heat transfer.

[0019] 4) The number of baffle arc tubes changes continuously with the flow of fluid in the tube, further enhancing heat transfer and improving the overall heat exchange efficiency.

[0020] 5) Regularly change the fluid flow rate of the upper and lower heads to make the free ends of the elastic tube bundles of the baffles vibrate frequently, thereby further achieving descaling and enhancing heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a shell and tube heat exchanger of the prior art; Figure 2 It is a schematic diagram of the heat exchange tube structure of a shell and tube heat exchanger provided with a hollow cavity baffle according to the present invention; Figure 3 is a front view of the elastic tube bundle baffle of the present invention; Figure 4 This is a front view of an elastic tube bundle baffle plate provided with heat exchange tubes according to the present invention; Figure 5 Schematic diagram of the connection between the heat exchange tube and the arc tube of the present invention; Figure 6 It is a structural schematic diagram of a shell and tube heat exchanger with upper and lower heads provided according to the present invention. DETAILED DESCRIPTION

[0022] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In this article, unless otherwise specified, “ / ” represents division, and “×” and “*” represent multiplication.

[0024] It should be noted that, unless otherwise specified, the two-phase flow mentioned in the present invention is a gas-liquid two-phase flow, where the gas is an insoluble or poorly soluble gas, that is, during the heat exchange process, the gas will not dissolve in the liquid.

[0025] Figure 1 The figure shows a shell and tube heat exchanger in the prior art, which comprises a shell 1, a heat exchange tube 8, a tube-side inlet tube 9, a tube-side outlet tube 10, a shell-side inlet pipe 2 and a shell-side outlet pipe 3; a heat exchange tube bundle composed of a plurality of parallel heat exchange tubes 8 is connected to a front tube sheet 6 and a rear tube sheet 7; the front end of the front tube sheet 6 is connected to a front head 4, and the rear end of the rear tube sheet 7 is connected to a rear head 5; the tube-side outlet pipe 10 is arranged on the rear head 5; the tube-side inlet pipe 9 is arranged on the front head 4; the shell-side inlet pipe 2 and the shell-side outlet pipe 3 are both arranged on the shell 4; the tube-side fluid enters from the tube-side inlet pipe 9, exchanges heat with the shell-side fluid through the heat exchange tubes, and exits from the tube-side outlet pipe 10.

[0026] Figure 2 The present invention demonstrates Figure 1 Shell and tube heat exchanger with elastic tube bundle structure baffle based on the improved one. Figure 2 As shown, the shell and tube heat exchanger includes a shell 1, a heat exchange tube 8, a tube side inlet tube 9, a tube side outlet tube 10, a shell side inlet pipe 2 and a shell side outlet pipe 3; a heat exchange tube bundle composed of a plurality of parallel heat exchange tubes 8 is connected to a front tube sheet 6 and a rear tube sheet 7; the front end of the front tube sheet is connected to a front head 4, and the rear end of the rear tube sheet is connected to a rear head 5; a baffle 11 is arranged in the shell, and the heat exchange tube 8 passes through the baffle 11; the other structures not described are Figure 1 same.

[0027] Relative to Figure 1 Improvements in heat exchangers, such as Figure 2-4 As shown, the baffle 11 is an elastic tube bundle structure, including an elastic tube bundle. Figure 3 , 4 As shown, the elastic tube bundle includes multiple arc tubes 111, the center lines of the multiple arc tubes are concentric arcs, the outermost arc tube 1111 has an outer open end 113, the innermost arc tube 1112 has an inner open end 114, the middle arc tube 1113 is adjacent to the inner and outer arc tubes, the end of the middle arc tube forms a connecting end 112 with an adjacent arc tube at one end, and is not connected at the other end, the end of the middle arc tube is not connected with another adjacent arc tube at one end, and forms a connecting end 112 at the other end, so that one end of the connecting end forms a free end, and the elastic tube bundle forms a series structure from the outer open end 113 to the inner open end 114. For example Figure 4The middle arc tube with reference numeral 1113 is connected to the outer arc tube at one end on the right side and is not connected to the left side, and is not connected to the inner arc tube at the right side and is connected to the left side. The arc tubes are connected in series from the outer opening end 113 to the inner opening end 114.

[0028] The baffle 11 is an elastic tube bundle structure, and each heat exchange tube 8 is divided into multiple sections, including edge heat exchange tube sections 81, 82 and a middle heat exchange tube section 83. Figure 2 As shown, the front end of the edge heat exchange pipe section 81 is connected to the front tube sheet 6, and is connected to the front head 4 through the front tube sheet 6, and the rear end is connected to the arc tube 111 of the adjacent baffle 11. The rear end of the edge heat exchange pipe section 82 is connected to the rear tube sheet 7, and is connected to the rear head 5 through the rear tube sheet 7, and the front end of the rear tube sheet is connected to the arc tube 111 of the adjacent baffle 11. The two ends of the middle heat exchange pipe section 83 are respectively connected to the arc tube 111 of the adjacent baffle, as shown in FIG. Figure 5 The heat exchange tube includes an outer tube 84 and an inner tube 85, and the outer open end 113 and the inner open end 114 of the elastic tube bundle are connected to the outer tube 84 and the inner tube 85 respectively.

[0029] The present invention innovatively changes the baffle into an elastic tube bundle structure, adds a free end of the elastic tube bundle, so that the fluid disturbance can be increased when the fluid in the tube side impacts, the heat transfer is enhanced and the descaling effect is achieved. At the same time, the fluid in the tube can flow inside the elastic tube bundle, further impacting the free end to vibrate, and the purpose of enhancing heat transfer and descaling is achieved. In addition, the above structure allows the baffle to be filled with tube side fluid, increasing the heat exchange area between the tube side fluid and the shell side fluid, and further enhancing heat transfer. At the same time, because the elastic tube bundle structure of the present invention increases the flow space of the tube side, the flow resistance is further reduced.

[0030] As an improvement, Figure 2 As shown, the heat exchanger further includes a support structure 12, which connects the inner wall of the shell side 1 and the outermost arc-shaped tube 1111 and is used to support the baffle.

[0031] As an improvement, the support structure 122 is a support plate, which is used to form a closed structure between the inner wall of the shell and the outermost arc tube. By forming a closed structure, the fluid is prevented from flowing through the upper part or the lower part, thereby reducing short circuits.

[0032] As an improvement, Figure 3-4 As shown, the connecting ends 112 of the adjacent arc-shaped tubes 111 are arranged at the center of the tube shell. For example, they are arranged on the central plane in the vertical direction of the tube shell. Because the volume of the fluid flowing through the center is the largest, by arranging them on the central plane, the fluid can flush the free end as much as possible, thereby enhancing heat transfer.

[0033] As an improvement, the spacing between adjacent arc tubes 111 is getting smaller and smaller from the center of the tube shell 1 to the inner wall of the tube shell, that is, along the radial direction of the baffle 11. By changing the arc tube spacing in the radial direction of the arc tube of the baffle, the fluid on the outside can flow to the middle as much as possible, further reducing fluid short circuit. At the same time, because the free ends of the elastic tube bundle are all in the center, the fluid can flush the free ends as much as possible to enhance heat transfer.

[0034] As an improvement, the distance between adjacent arc tubes 111 is gradually reduced from the center of the tube shell 1 to the inner wall of the tube shell 1. The above structure can further enhance heat transfer and achieve better heat exchange effect.

[0035] As an improvement, the distribution density of the heat exchange tubes 8 increases as the distance from the connecting position of the adjacent arc tube increases. By changing the density of the heat exchange tubes at a distance from the connecting portion of the arc tube, the free end of the connecting portion can vibrate freely as much as possible to enhance heat transfer.

[0036] As an improvement, as the distance from the connecting position of the adjacent arc tube increases, the distribution density of the heat exchange tube increases. The density of the heat exchange tube varies with the distance from the connecting part of the arc tube, so that the free end of the connecting part can vibrate freely as much as possible to enhance heat transfer.

[0037] As an improvement, the diameters of the outer tube 84 and the inner tube 85 are larger than the diameters of other heat exchange tubes. By such an arrangement, the outer tube and the inner tube are used as an end structure to bear more fluid distribution, so that a large amount of fluid can enter the middle elastic free end through the outermost arc tube and the innermost arc tube, thereby increasing the frequency of elastic vibration, improving the heat exchange coefficient, and increasing the descaling ability.

[0038] As an improvement, the shell and tube heat exchanger is a horizontal shell and tube heat exchanger, and the baffles 11 are arranged in the up and down directions.

[0039] As a preference, Figure 3 As shown, the elastic tube bundle structure is a semicircular structure.

[0040] As an improvement, the heat exchange fluids in the tube side and shell side flow in countercurrent. Along the flow direction of the fluid in the tube side, from the tube side inlet to the middle of the tube side, the number of arc tubes of the baffles decreases continuously, and then from the middle of the tube side to the tube side outlet, the number of arc tubes of the baffles increases continuously. Because in the countercurrent process, the heat exchange of the shell side and the tube side per unit length along the flow process of the fluid is relatively uniform, so that the overall heat exchange effect is the best. However, it was found in experiments and simulations that the heat exchange in the middle is significantly greater than the heat exchange at the tube side inlet and outlet. Therefore, the heat exchange area between the tube side fluid and the shell side fluid changes by changing the number of arc tubes. The heat exchange area also increases and decreases with the increase and decrease of the volume. Therefore, the uneven heat exchange is compensated by the change of area, thereby further improving the heat exchange efficiency.

[0041] As an improvement, along the flow direction of the fluid in the tube, from the tube entrance to the middle of the tube, the number of arc tubes of the baffle plate decreases and the amplitude increases, and then from the middle of the tube to the tube exit, the number of arc tubes of the baffle plate increases and the amplitude decreases. The above amplitude changes can make the heat exchange per unit length of the entire fluid movement more uniform, further improving the heat exchange efficiency.

[0042] As an improvement, the shell and tube heat exchanger is a horizontal shell and tube heat exchanger, and the baffles are arranged in the up and down directions.

[0043] As an improvement, along the flow direction of the fluid in the tube, the spacing between the baffles 11 decreases continuously from the tube entrance to the middle of the tube, and then increases continuously from the middle of the tube to the tube exit.

[0044] As an improvement, along the flow direction of the fluid in the tube, from the tube entrance to the middle of the tube, the spacing between the baffles 11 decreases and increases. Then, from the middle of the tube to the tube exit, the spacing between the baffles 11 increases and decreases.

[0045] The technical effect of the change in the number of baffle distribution mentioned above can be referred to the technical effect of the change in the volume of the baffle mentioned above.

[0046] As an improvement, Figure 6As shown, the inlet end cap 4 is divided into two parts 41 and 42 by a partition 12, wherein the upper heat exchange tube 111 is connected to the upper end cap 41, and the lower heat exchange tube 112 is connected to the lower end cap 42. The upper end cap 41 and the lower end cap 42 are respectively provided with an upper inlet 91 and a lower inlet 92, and the fluid flow of the upper inlet 91 and the lower inlet 92 can be controlled separately, preferably by a controller. As an improvement, the fluid flow of the upper end cap 41 and the lower end cap 42 are different, so that the fluid flow entering the upper heat exchange tube 111 and the lower heat exchange tube 112 are different.

[0047] By setting the upper and lower heads, the fluid flow rates of the upper and lower heads are different, so that the flow rates at different positions in the arc tube can be different, so that the free end can maintain frequent vibration due to the different flow rates, further enhancing heat transfer.

[0048] As an improvement, within a cycle T, within 0-T / 2, the flow rate of the upper head is V1, and the flow rate of the lower head is V2, where V1 is greater than V2, so that the fluid flow rate in the upper heat exchange tube is greater than that in the lower heat exchange tube, and within T / 2-T, the flow rate of the lower head is V1, and the flow rate of the upper head is V2, so that the fluid flow rate in the lower heat exchange tube is greater than that in the upper heat exchange tube. The fluid flow rates of the upper and lower heads are changed regularly, so that the fluid in the arc tube of the baffle changes the circulation flow direction, so that the free end maintains frequent vibration due to the different directions of fluid movement, and the circulation disturbance changes the impact direction regularly, thereby further enhancing heat transfer.

[0049] Preferably, the period T may be 30-50 minutes.

[0050] Preferably, V1 is 3-5 times greater than V2.

[0051] As an improvement, the fluid entering the upper head and the lower head is a pulsating flow with a constantly changing flow velocity. The pulsating flow continuously changes the direction of the circulating flow through the fluid in the arc tube, so that the free end maintains frequent vibrations due to the different directions of fluid movement.

[0052] As a preferred embodiment, within a period T, within 0-T / 2, the flow velocity of the upper head increases continuously from 0 to V, and the velocity of the lower head decreases continuously from V to 0; within T / 2-T, the flow velocity of the lower head increases continuously from 0 to V, and the velocity of the upper head decreases continuously from V to 0. The fluid passing through the upper and lower heads continuously changes its flow velocity, so that the fluid continuously changes its disturbance direction, promoting further heat exchange.

[0053] As an improvement, the tube-side inlet pipe is arranged on the rear head; the tube-side outlet pipe is arranged on the front head; the shell-side inlet pipe and the shell-side outlet pipe are both arranged on the shell, and the heat exchange tube is an arc tube connected to the baffle 11 by welding.

[0054] Although the present invention has been disclosed as above with preferred embodiments, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A shell and tube heat exchanger with elastic baffles, the shell and tube heat exchanger comprises a tube shell, a heat exchange tube, a tube side inlet tube, a tube side outlet tube, a shell side inlet pipe and a shell side outlet pipe; a heat exchange tube bundle composed of a plurality of parallel heat exchange tubes is connected to a front tube sheet and a rear tube sheet; the front end of the front tube sheet is connected to a front end cap, and the rear end of the rear tube sheet is connected to a rear end cap; a baffle is arranged in the shell, and the heat exchange tube passes through the baffle; characterized in that, The baffle is an elastic tube bundle structure, including an elastic tube bundle, the elastic tube bundle includes a plurality of arc tubes, the center lines of the plurality of arc tubes are concentric arcs, the outermost arc tube has an outer open end, the innermost arc tube has an inner open end, the middle arc tube end forms a connecting end with an adjacent arc tube at one end, and is not connected at the other end, the middle arc tube end is not connected with another adjacent arc tube at one end, and forms a connecting end at the other end, thereby forming a connecting end with a free end, and the elastic tube bundle A series structure is formed from the outer open end to the inner open end; each heat exchange tube is divided into multiple sections, including an edge heat exchange tube section and an intermediate heat exchange tube section, wherein one end of the edge heat exchange tube section is connected to the front tube plate or the rear tube plate to communicate with the front head and the rear head, and the other end is connected to the arc tube in the baffle, and the two ends of the intermediate heat exchange tube section are respectively connected to the arc tubes of the adjacent baffles, the heat exchange tube includes an outer tube and an inner tube, and the outer open end and the inner open end of the elastic tube bundle are respectively connected to the outer tube and the inner tube.

2. The shell and tube heat exchanger with elastic baffles according to claim 1, characterized in that: It also includes a supporting structure, which connects the inner wall of the shell and the outermost arc tube and is used to support the baffle.

3. The shell and tube heat exchanger with elastic baffles according to claim 2, characterized in that: The supporting structure is a supporting plate, which is used to form a closed structure between the inner wall of the shell and the outermost arc-shaped tube.

4. The shell and tube heat exchanger with elastic baffles according to claim 1, characterized in that: The communicating position of adjacent arc-shaped tubes is arranged at the center of the tube shell.

5. The shell and tube heat exchanger with elastic baffles according to claim 1, characterized in that: The diameters of the outer tube and the inner tube are larger than the diameters of other heat exchange tubes.

6. The shell and tube heat exchanger according to claim 1, characterized in that: The shell and tube heat exchanger is a horizontal shell and tube heat exchanger, and the baffles are arranged in the up-down direction.

7. The shell and tube heat exchanger according to claim 1, characterized in that: The elastic tube bundle structure is a semicircular structure.

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