Tube support structure for shell-and-tube heat exchangers

Abstract

The application discloses a pipe supporting structure for a shell-and-tube heat exchanger and relates to the field of shell-and-tube heat exchangers. The pipe supporting structure comprises a shell, the upper and lower ends of the shell are respectively connected with an upper containing bin and a lower containing bin, a plurality of groups of heat exchange pipes are connected between the upper containing bin and the lower containing bin inside the shell, a spiral plate in a spiral shape is arranged in the shell, the radius of the spiral plate is the same as the inner diameter of the shell, the plurality of groups of heat exchange pipes all penetrate through the spiral plate, and the outer wall of the heat exchange pipe is provided with a fluid guiding structure. The fluid guiding structure can make the fluid in the shell flush the other side of the heat exchange pipe after flushing one side of the heat exchange pipe at a high speed. The application sets the spiral flow channel structure in the shell, thereby avoiding the flow dead angle of the fluid, and improving the heat exchange efficiency of the heat exchange pipe. The fluid guiding structure is arranged on the outer wall of the heat exchange pipe, thereby further improving the heat exchange efficiency of the heat exchange pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tube-shell heat exchanger, in particular to a pipe support structure for tube-shell heat exchanger. BACKGROUND

[0002] The tube-shell heat exchanger, also known as the tube heat exchanger, is a wall surface of a tube bundle enclosed in a shell as a heat transfer surface, which is a type of heat exchanger with simple structure, low cost, wide flow cross section and easy cleaning of scale.

[0003] The tube-shell heat exchanger in the prior art is usually provided with an arc baffle, which is a component for supporting the heat exchange tube. The arc baffle is usually made of a steel plate, and the arc is formed by cutting 1 / 4 to 1 / 3 of a circle. Fluid passes through the gap, and a tube hole is provided on the arc baffle for the heat exchange tube to pass through, thereby supporting the heat exchange tube. A plurality of baffles are arranged at equal intervals along the axial direction, the gap directions of adjacent two baffles are opposite, and the shell side fluid flows alternately in an S shape from the upper and lower gaps or the left and right gaps.

[0004] However, such a flow mode in the prior art is prone to flow dead angles, and the heat transfer area on the surface of the heat exchange tube cannot be fully utilized. Moreover, when the fluid flows through the tube bundle, the resistance of the fluid is also large.

[0005] Therefore, the pipe support structure for the tube-shell heat exchanger in the prior art has the problem that the heat exchange tube surface area is not easy to be efficiently utilized, thereby easily causing low heat exchange efficiency. SUMMARY

[0006] Therefore, the pipe support structure for the tube-shell heat exchanger in the prior art has the problem that the heat exchange tube surface area is not easy to be efficiently utilized, thereby easily causing low heat exchange efficiency.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a pipe support structure for a tube-shell heat exchanger, comprising a tube shell, the upper and lower ends of the tube shell are respectively connected with an upper containing bin and a lower containing bin, a plurality of groups of heat exchange tubes are connected inside the tube shell between the upper containing bin and the lower containing bin, a spiral plate is arranged in the tube shell, the radius of the spiral plate is the same as the inner diameter of the tube shell, the plurality of groups of heat exchange tubes all penetrate the spiral plate, and the outer wall of the heat exchange tube is provided with a fluid guiding structure, which can flush the other side of the heat exchange tube after flushing one side of the heat exchange tube at high speed.

[0008] By adopting the technical scheme, the heat exchange pipe is arranged through the spiral flow channel structure, the spiral flow channel structure is used for supporting and fixing the heat exchange pipe in the pipe shell, the heat exchange pipe is supported and the fluid in the pipe shell is uniformly flowed, and then the flow dead angle of the fluid is avoided, so that the heat exchange efficiency of the heat exchange pipe is improved.

[0009] The application is further provided that the outer wall of the heat exchange pipe is fixed with a plurality of fixed blocks along the axial direction, the rotating shaft is arranged between the fixed blocks, and the rotating plate is rotationally connected to the rotating shaft.

[0010] By adopting the technical scheme, the rotating plate can guide the fluid, the fluid is guided to flush the backwater side of the heat exchange pipe when passing through the rotating plate, and then the heat exchange efficiency of the heat exchange pipe is improved.

[0011] The application is further provided that the axis of the rotating shaft is parallel to the heat exchange pipe, and the rotating plate is arc-shaped and parallel to the heat exchange pipe.

[0012] By adopting the technical scheme, the rotating plate is avoided from rotating to increase the resistance of the fluid.

[0013] The application is further provided that the rotating plate is arranged between the upper and lower spiral plates of the same heat exchange pipe, the connecting line of the rotating plate on one side of the rotating shaft is coincident with the cross-sectional diameter of the heat exchange pipe, and the other side is away from the direction of the fluid in the pipe shell.

[0014] By adopting the technical scheme, when the fluid on both sides of the rotating plate converges after flushing one side of the heat exchange pipe, the impact wave is caused on the backwater side of the heat exchange pipe, and the contact efficiency of the fluid on the backwater side of the heat exchange pipe is improved.

[0015] The application is further provided that the outer wall of the heat exchange pipe is fixed with a plurality of fixed blocks along the spiral direction of the spiral plate, and the fixed blocks are fixed with arc plates.

[0016] By adopting the technical scheme, the fixed blocks arranged in the spiral shape can be installed with the arc plates arranged in the spiral shape.

[0017] The application is further provided that the arc plates are also arranged in the spiral shape, and the pitch is the same as that of the spiral plate.

[0018] By adopting the technical scheme, the fluid at any position is as smoothly flowed as possible, and the resistance of the fluid is reduced.

[0019] The application is further provided that the cross sections of the two groups of arc plates on the cross section of the heat exchange pipe fixed with the arc plates are symmetrical to each other, the connecting line on one side coincides with the diameter of the heat exchange pipe, and the connecting line on the other side is away from the direction of the fluid in the pipe shell.

[0020] By adopting the above technical scheme, the fluid in the pipe shell is subjected to the guidance of the arc plate after impacting one side of the heat exchange pipe, and the back of the heat exchange pipe is subjected to the same efficient flushing when converging, thereby improving the heat exchange efficiency of the fluid in the heat exchange pipe and the fluid in the pipe shell.

[0021] The application is further provided that the bottom end of the lower containing bin is connected with a first liquid inlet, the top end of the upper containing bin is connected with a first liquid outlet, one side of the top of the pipe shell is connected with a second liquid inlet, and one side of the bottom of the pipe shell is connected with a second liquid outlet.

[0022] By adopting the above technical scheme, the fluid in the heat exchange pipe flows slowly from bottom to top, the heat exchange time is increased to improve the heat exchange effect, the fluid in the pipe shell spirally flows down from top to bottom at high speed, the heat exchange dead angle is avoided, and the heat exchange efficiency is improved.

[0023] In summary, the application mainly has the following beneficial effects:

[0024] 1. The application sets the spiral flow channel structure in the pipe shell, the heat exchange pipe passes through the flow channel structure, the heat exchange pipe in the pipe shell is fixed by the spiral flow channel structure, the heat exchange pipe is supported, the fluid in the pipe shell is uniformly flowed, the flow dead angle of the fluid is avoided, and the heat exchange efficiency of the heat exchange pipe is improved;

[0025] 2. The application sets the flow guide structure on the outer wall of the heat exchange pipe, the fluid in the flow channel can efficiently contact and exchange heat with the other side after flowing through one side of the heat exchange pipe, and the heat exchange efficiency of the heat exchange pipe is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a perspective view of the application;

[0027] Figure 2 It is an internal perspective view of the application;

[0028] Figure 3 It is a perspective view of the spiral plate of the application;

[0029] Figure 4 It is a cross section view of the heat exchange pipe of the first embodiment of the application;

[0030] Figure 5 It is a cross section view of the heat exchange pipe of the second embodiment of the application;

[0031] Figure 6 It is a perspective view of the upper part of the heat exchange pipe of the second embodiment of the application;

[0032] Figure 7 Figure 1 is a perspective view of the heat exchange pipe of the second embodiment of the present application.

[0033] Figure 1 is a perspective view of the heat exchange pipe of the second embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0035] The embodiments of the present application will be described below according to the overall structure of the present application.

[0036] Embodiment 1

[0037] The pipe support structure for the shell-and-tube heat exchanger, as shown in Figures 1-4 Figure 1, includes a shell 1, an installation rack 8 is fixed to the outer wall of the shell 1, the shell-and-tube heat exchanger is vertically installed at a desired position through the installation rack 8, an upper containing bin 2 and a lower containing bin 3 are respectively connected to the upper and lower ends of the shell 1, a plurality of heat exchange pipes 11 are connected between the upper containing bin 2 and the lower containing bin 3 inside the shell 1, a helical spiral plate 10 is arranged in the shell 1, a horizontal upper plate 12 and a horizontal lower plate 13 are respectively connected to the top end and the bottom end of the spiral plate 10, specifically, the upper plate 12 and the lower plate 13 make the fluid flowing into the shell 1 or flowing out of the shell 1 better flow along the preset path in the shell 1, the radius of the spiral plate 10 is the same as the inner diameter of the shell 1, the plurality of heat exchange pipes 11 all penetrate the spiral plate 10, and further, in order to make the spiral plate 10 more stable, a solid center shaft 9 is coaxially fixed in the center of the shell 1, the center shaft 9 is fixedly connected with the spiral plate 10, and the structure strength of the spiral plate 10 is strengthened, and a fluid guiding structure is arranged on the outer wall of the heat exchange pipe 11, the fluid guiding structure makes the fluid in the shell 1 also wash the other side of the heat exchange pipe 11 after washing one side of the heat exchange pipe 11 at high speed.

[0038] On the basis of the above structure, in the present embodiment, a plurality of fixed blocks 14 are fixed to the outer wall of the heat exchange pipe 11 along the axial direction, a rotating shaft 15 penetrates between the fixed blocks 14, a rotating plate 16 is rotatably connected to the rotating shaft 15, the rotating plate 16 can play a role of guiding the fluid, so that the fluid can wash the backwater side of the heat exchange pipe 11 when passing through the rotating plate 16, and the heat exchange efficiency of the heat exchange pipe is further improved.

[0039] On the basis of the above structure, in the embodiment, the rotating plate 16 is arranged between the upper and lower two spiral plates 10 of the same heat exchange pipe 11, the connecting line of the rotating plate 16 on one side of the rotating shaft 15 coincides with the cross-sectional diameter of the heat exchange pipe 11, and the other side is away from the direction of the fluid in the pipe shell 1, so that the fluid collides with the heat exchange pipe 11 on one side, and then flows through the guide of the rotating plate 16 when the fluid on both sides converges, thereby causing an impact water wave on the backwater side of the heat exchange pipe 11, and improving the contact efficiency of the backwater side of the heat exchange pipe 11 with the fluid.

[0040] The axis of the rotating shaft 15 is parallel to the heat exchange pipe 11, the rotating plate 16 is arc-shaped and also parallel to the heat exchange pipe 11, and the rotation of the rotating plate 16 avoids increasing excessive resistance of the fluid, and specifically, the rotating shaft 15 is provided with a torsional spring. When the flow rate of the fluid in the pipe shell 1 is low, the rotation angle of the rotating plate 16 is small, the fluid flows through the gap between the outer wall of the heat exchange pipe 11 and the rotating plate 16, and when the flow rate of the fluid in the pipe shell 1 is high, the rotation angle of the rotating plate 16 is large, the fluid pushes the rotating plate 16 to the two sides, and the torsional spring in the rotating shaft 15 enables the rotating plate 16 to better adapt to the fluid with different flow rates.

[0041] On the basis of the above structure, in the embodiment, the bottom end of the lower containing bin 3 is connected with the first liquid inlet 5, the top end of the upper containing bin 2 is connected with the first liquid outlet 4, one side of the top of the pipe shell 1 is connected with the second liquid inlet 6, and one side of the bottom is connected with the second liquid outlet 7, the fluid in the heat exchange pipe 11 flows slowly from bottom to top, the heat exchange time is increased to improve the heat exchange effect, the fluid in the pipe shell 1 spirally flows downward from top to bottom at high speed, the heat exchange dead angle is avoided, and the heat exchange efficiency is improved, and specifically, the first heat exchange fluid flows into the lower containing bin 3 from the first liquid inlet 5, flows into the upper containing bin 2 vertically upward through the plurality of heat exchange pipes 11, and then flows out from the first liquid outlet 4, and the second heat exchange fluid flows into the pipe shell 1 from the second liquid inlet 6, spirally descends under the guidance of the spiral plate 10, and then flows out from the second liquid outlet 7.

[0042] Embodiment two:

[0043] A pipe support structure for a shell-and-tube heat exchanger, such as Figures 5-7As shown, unlike the embodiment, in the embodiment, the outer wall of the heat exchange pipe 11 is provided with a plurality of fixed blocks 14 in the spiral direction of the spiral plate 10, and the plurality of fixed blocks 14 are fixed with arc plates 17, the spiral fixed blocks 14 can install the spiral arc plates 17, the arc plates 17 are also spiral, and the pitch is the same as that of the spiral plate 10, so that the fluid at any position flows as smoothly as possible, and the resistance of the fluid flow is reduced, the cross section of the two arc plates 17 fixed with the arc plates 17 on the cross section of the heat exchange pipe 11 is symmetrical to each other, the connecting line on one side coincides with the diameter of the heat exchange pipe 11, and the other side deviates from the direction of the fluid in the pipe shell 1, the fluid in the pipe shell 1 is guided by the arc plate 17 after impacting one side of the heat exchange pipe 11, and performs the same efficient flushing on the back of the heat exchange pipe 11 when converging, thereby improving the heat exchange efficiency of the fluid in the heat exchange pipe 11 and the fluid in the pipe shell 1, and the spiral arc plate 17 has smaller resistance to the fluid than the rotating plate 16 in the first embodiment, and can better guide the fluid.

[0044] The present application creatively sets a spiral flow channel in the pipe shell, cooperates with the flow guiding structure on the outer wall of the heat exchange pipe, avoids the shortcomings of the prior art that the surface area of the heat exchange pipe is not easy to be efficiently utilized, and further easily produces low heat exchange efficiency; in the present scheme, the spiral flow channel structure is set in the pipe shell, the heat exchange pipe passes through the flow channel structure, the spiral flow channel structure supports and fixes the heat exchange pipe in the pipe shell, the heat exchange pipe is supported while the fluid in the pipe shell is uniformly flowed, and then the flow dead angle of the fluid is avoided, so that the heat exchange efficiency of the heat exchange pipe is improved, and the flow guiding structure is arranged on the outer wall of the heat exchange pipe, the fluid in the flow channel can be efficiently contacted and heat exchanged with the other side after flowing through one side of the heat exchange pipe, so that the heat exchange efficiency of the heat exchange pipe is further improved.

[0045] Although the embodiments of the present application have been shown and described, the specific embodiments are only an explanation of the present application, and are not a limitation of the application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, as long as they are within the scope of the claims of the present application.

Claims

1. A pipe support structure for a shell-and-tube heat exchanger, comprising a shell, wherein an upper receiving chamber and a lower receiving chamber are respectively connected to the upper and lower receiving chambers inside the shell, and multiple sets of heat exchange tubes are connected between the upper and lower receiving chambers, characterized in that: A spiral plate is installed inside the tube shell, the radius of which is the same as the inner diameter of the tube shell. Multiple sets of heat exchange tubes pass through the spiral plate. The outer wall of the heat exchange tube is provided with a flow guiding structure, which allows the fluid inside the tube shell to flow over the other side of the heat exchange tube after it has been subjected to high-speed scouring on one side. Multiple sets of fixing blocks are fixed along the axial direction on the outer wall of the heat exchange tube, and a rotating shaft passes between the fixing blocks. The rotating shaft is rotatably connected to a rotating plate, and the rotating plate is positioned between the upper and lower spiral plates of the same heat exchange tube. Two sets of rotating plates are provided. The line connecting one side of the rotating shaft of the two sets of rotating plates coincides with the diameter of the heat exchange tube cross-section, while the other side is away from the direction of the fluid coming from the tube shell. Multiple sets of fixing blocks are arranged at intervals along the spiral direction of the spiral plate on the outer wall of the heat exchange tube. Arc plates are fixed to the multiple sets of fixing blocks. Two sets of arc plates are arranged between the upper and lower spiral plates of the same heat exchange tube. The cross-sections of the two sets of arc plates on the heat exchange tube with the arc plates fixed are symmetrical to each other. The line connecting one side coincides with the diameter of the heat exchange tube, and the other side is away from the direction of the fluid coming from the tube shell.

2. The pipe support structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: The axis of the rotating shaft is parallel to the heat exchange tube, and the rotating plate is arc-shaped and also parallel to the heat exchange tube.

3. The pipe support structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: The arc plate is also spiral-shaped, and the pitch is the same as that of the spiral plate.

4. The pipe support structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: The bottom of the lower container is connected to a first liquid inlet, the top of the upper container is connected to a first liquid outlet, one side of the top of the tube shell is connected to a second liquid inlet, and one side of the bottom is connected to a second liquid outlet.

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