Heat exchanger additionally provided with double-notch guide plate

Abstract

The utility model relates to the field of heat exchangers, and discloses a heat exchanger additionally provided with a double-notch guide plate. The shell is connected with the sealing head; the shell is respectively connected with the shell pass fluid inlet connecting pipe and the shell pass fluid outlet connecting pipe; a plurality of composite baffling guide plate groups and a plurality of longitudinally arranged heat exchange tubes are arranged in the shell; heat exchange tube holes matched with the heat exchange tubes are formed in the composite baffling guide plate groups; each composite baffling guide plate group comprises an arch-shaped baffling plate group and a double-notch guide plate group which are arranged in an up-and-down staggered manner; the composite baffling and guiding plate sets are perpendicular to the longitudinal section of the heat exchange pipe, and the radial projection of each composite baffling and guiding plate set is a whole circle and is matched with the shell. Compared with a traditional arch-shaped baffle plate, the heat exchanger has the advantages that the heat exchange effect can be effectively improved within a certain pressure drop range, a fluid flowing stagnant zone can be effectively reduced, and meanwhile compared with a novel special-shaped baffle plate, the heat exchanger is easy to manufacture and assemble and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger with an additional double-notch guide plate. Background Art

[0002] In the context of the energy-saving era, how to improve energy utilization has become a global concern and issue to be tackled. Among modern equipment involving energy utilization, heat exchange equipment accounts for about 30%, and is widely used in chemical, oil refining, food, light industry, energy, pharmaceutical and other fields. Most of the current heat exchange equipment still uses the traditional bow-shaped baffle structure. The advantage is that this structure has mature technology and simple manufacturing process. The disadvantage is that this structure has a large fluid flow dead zone, which will reduce the equipment's heat transfer coefficient and cause the equipment to be easily scaled. In order to eliminate this drawback, many researchers have been improving the baffle form, and many high-efficiency heat exchangers have emerged. However, the manufacturing process of the special-shaped baffle itself is relatively complicated, and it requires the manufacturing precision of other matching components to be improved, which in turn increases the manufacturing cost. In addition, once the heat exchanger leaks, it is more difficult to repair than the traditional heat exchanger. For this reason, it is very necessary to develop a heat exchanger that is easy to manufacture and improves heat exchange efficiency. Utility Model Content

[0003] In response to the above-mentioned technical deficiencies, the technical problem to be solved by the present invention is to provide a heat exchanger with an additional double-notch guide plate, aiming to simplify the manufacturing and maintenance processes while improving the heat exchange efficiency and reducing the fluid flow stagnation area by optimizing the baffle design.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a heat exchanger with an additional double-notch guide plate, comprising: a shell and a head; the shell is connected to the head; the shell is respectively connected to the shell-side fluid inlet pipe and the shell-side fluid outlet pipe; a plurality of groups of composite baffle guide plate groups and a plurality of longitudinally arranged heat exchange tubes are provided in the shell; the composite baffle guide plate groups are provided with heat exchange tube holes that are matched with the heat exchange tubes; each group of the composite baffle guide plate groups includes a bow-shaped baffle plate group and a double-notch guide plate group that are staggered in the upper and lower parts; the composite baffle guide plate group is arranged perpendicular to the longitudinal cross-section of the heat exchange tube, and the radial projection of each group of the composite baffle guide plate groups is a full circle and is adapted to the shell.

[0005] Furthermore, the vertically staggered arched baffle group and double-notch guide plate group are arranged in a "V" shape and are perpendicular to the longitudinal cross-section of the heat exchange tube.

[0006] Furthermore, the arcuate baffle group includes a first arcuate baffle, a second arcuate baffle and a third arcuate baffle of equal length;

[0007] The first and third arc baffle plates are fixed above the inner wall of the shell, and the second arc baffle plate is fixed below the inner wall of the shell.

[0008] The second arc baffle plate is fixed below the inner wall of the shell.

[0009] Further, the double-gap baffle plate group comprises a plurality of reverse "Z"-shaped double-gap baffle plates and a plurality of "Z"-shaped double-gap baffle plates.

[0010] Further, the reverse "Z"-shaped double-gap baffle plates and the "Z"-shaped double-gap baffle plates are mirror arranged relative to the second arc baffle plate.

[0011] Further, the plurality of reverse "Z"-shaped double-gap baffle plates are arranged between the first arc baffle plate and the second arc baffle plate at equal intervals along a direction parallel to the heat exchange tube and a direction perpendicular to the heat exchange tube.

[0012] The plurality of "Z"-shaped double-gap baffle plates are arranged between the second arc baffle plate and the third arc baffle plate at equal intervals along a direction parallel to the heat exchange tube and a direction perpendicular to the heat exchange tube.

[0013] Further, the distance between the arc baffle plate group and the double-gap baffle plate group in the composite baffle and guide plate group is 10-50 mm.

[0014] Further, the gap width of the reverse "Z"-shaped double-gap baffle plate and the "Z"-shaped double-gap baffle plate in the double-gap baffle plate group is 5-20 mm, and the gap depth is 10-30 mm.

[0015] The gap width is the horizontal distance of the gap on the double-gap baffle plate group along the fluid flow direction, and the depth is the vertical distance of the gap on the double-gap baffle plate along the direction perpendicular to the fluid flow direction.

[0016] The beneficial effects of the utility model lie in:

[0017] 1. Compared with the traditional arc baffle plate, the heat exchange effect can be effectively improved and the fluid flow dead zone can be reduced within a certain pressure drop range.

[0018] 2. Compared with the new special-shaped baffle plate, the heat exchanger of the utility model is not only simple to manufacture and assemble, but also convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of a heat exchanger with an additional double-notch guide plate provided in an embodiment of the present utility model.

[0021] Figure 2 Schematic diagram of the composite baffle guide plate group.

[0022] Figure 3 Schematic diagram of shell-side fluid flow.

[0023] Explanation of the accompanying symbols: 1. Shell; 2. Head; 3. Heat exchange tube; 4. Composite baffle guide plate group; 5. Shell-side fluid; 41. First bow-shaped baffle; 42. Second bow-shaped baffle; 43. Third bow-shaped baffle; 44. Inverted "Z"-shaped double-notch guide plate; 45. "Z"-shaped double-notch guide plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figures 1 to 3 As shown, this embodiment provides a heat exchanger with a double-notch guide plate, such as Figure 1 As shown, it includes: a shell 1 and a head 2, the shell 1 is connected to the head 2 to form a closed chamber; the shell 1 is respectively connected to the shell-side fluid 5 inlet pipe and the shell-side fluid 5 outlet pipe for introducing and discharging the shell-side fluid 5; a plurality of longitudinally arranged heat exchange tubes 3 are provided in the shell 1, and these heat exchange tubes 3 pass through the heat exchange tube holes on the composite baffle guide plate group 4 to ensure effective heat exchange between the shell side and the tube side.

[0026] Preferably, Figure 2As shown, the composite baffle guide plate group 4 is a key component of the present invention, and each composite baffle guide plate group 4 includes a bow baffle group and a double-notch guide plate group that are staggered up and down; the composite baffle guide plate group is arranged perpendicular to the longitudinal section of the heat exchange tube, and the radial projection of each composite baffle guide plate group is a full circle and is adapted to the shell; the bow baffle group is composed of a first bow baffle 41, a second bow baffle 42 and a third bow baffle 43 of equal length; the first bow baffle 41 and the third bow baffle 43 are fixed above the inner wall of the shell 1, and the second bow baffle 42 is fixed below the inner wall of the shell 1; the bow baffle group is in a "V" shape and arranged perpendicular to the longitudinal section of the heat exchange tube 3, ensuring that the fluid is well guided when passing through, making the flow direction more uniform.

[0027] Specifically, the double-notch guide plate group includes several inverted "Z"-shaped double-notch guide plates 44 and several "Z"-shaped double-notch guide plates 45. The inverted "Z"-shaped double-notch guide plates 44 and several "Z"-shaped double-notch guide plates 45 are arranged in a mirror image with respect to the second bow-shaped baffle 42, and are arranged in sequence at equal intervals in the direction parallel to the heat exchange tube 3 and perpendicular to the heat exchange tube 3; the inverted "Z"-shaped double-notch guide plate 44 is arranged between the first bow-shaped baffle 41 and the second bow-shaped baffle 42, while the "Z"-shaped double-notch guide plate 45 is arranged between the second bow-shaped baffle 42 and the third bow-shaped baffle 43; this layout enables the fluid to generate more turbulence when passing through the double-notch guide plate group, thereby improving the heat exchange efficiency.

[0028] Preferably, in order to adapt to different working conditions, the spacing between the bow-shaped baffle group and the double-notch guide plate group in the composite baffle guide plate group 4 is adjustable, and the adjustment range is 10 mm to 50 mm; for high-viscosity fluids, such as heavy oil, polymer solutions, etc., the larger spacing of 30 mm to 50 mm helps to reduce fluid resistance and prevent the flow rate in local areas from being too low, resulting in a decrease in heat transfer efficiency; for low-viscosity fluids, such as water, light oil, etc., the smaller spacing of 10 mm to 20 mm can increase the turbulence of the fluid and improve the heat transfer efficiency; under high flow conditions, the larger spacing of 30 mm to 50 mm can reduce the pressure drop and ensure the stable operation of the system; and under low flow conditions, the smaller spacing of 10 mm to 20 mm can increase the disturbance of the fluid and improve the heat transfer coefficient.

[0029] In addition, the notch width and depth of the inverted "Z"-shaped double-notch guide plate 44 and the "Z"-shaped double-notch guide plate 45 in the double-notch guide plate group can also be adjusted. Specifically, the adjustment range of the notch width is 5mm to 20mm, and the adjustment range of the notch depth is 10mm to 30mm; the wider notch of 15mm to 20mm can reduce the local resistance of the fluid and is suitable for high viscosity or high flow conditions; the narrower notch of 5mm to 10mm can increase the turbulence of the fluid and is suitable for low viscosity or low flow conditions; the deeper notch of 20mm to 30mm can increase the flow path length of the fluid and increase the heat exchange area, which is suitable for occasions requiring higher heat exchange efficiency; the shallower notch of 10mm to 15mm can reduce the pressure drop and is suitable for occasions with strict requirements on pressure drop.

[0030] like Figure 3 As shown, in actual operation, shell-side fluid 5 enters the heat exchanger through the shell-side fluid 5 inlet pipe and flows along the composite baffle assembly 4 inside the shell 1. As it flows through the arched baffle assembly, the fluid is guided by the arched baffle assembly, making its flow more uniform. When the fluid reaches the double-notch guide plate assembly, the double notch causes disturbance, generating more turbulence, thereby improving heat exchange efficiency. Finally, the fluid exits the heat exchanger through the shell-side fluid 5 outlet pipe.

[0031] Through the above-mentioned structure and adjustment method, the heat exchanger of the present invention with the addition of a double-notched guide plate group can significantly improve the flow state of the fluid in the baffle area, enhancing heat exchange efficiency and system stability. Specific effects include: improving heat exchange efficiency, by adding a double-notched guide plate group, increasing the turbulence of the fluid and improving the heat transfer coefficient; reducing pressure drop, by properly adjusting the spacing and notch size, while reducing system pressure drop while meeting heat exchange efficiency; and adapting to various operating conditions, by flexibly adjusting the spacing and notch size, the present invention can adapt to operating conditions with different viscosities, flow rates, and heat exchange requirements.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat exchanger with double-notch guide plates, characterized in that: include: Shell and head; The shell is connected to the head; The shell is connected to the shell-side fluid inlet pipe and the shell-side fluid outlet pipe respectively; The shell is provided with a plurality of composite baffle guide plate groups and a plurality of longitudinally arranged heat exchange tubes; The composite baffle guide plate group is provided with heat exchange tube holes that are matched with the heat exchange tubes; Each group of the composite baffle guide plate group includes an arcuate baffle group and a double-notch guide plate group arranged in an upper and lower staggered manner; The composite baffle guide plate group is arranged perpendicular to the longitudinal section of the heat exchange tube, and the radial projection of each composite baffle guide plate group is a full circle and is adapted to the shell.

2. A heat exchanger with double-notched guide plates as claimed in claim 1, characterized in that: The upper and lower staggered arched baffle groups and double-notch guide plate groups are arranged in a "V" shape and are perpendicular to the longitudinal cross-section of the heat exchange tube.

3. A heat exchanger with double-notched guide plates as claimed in claim 2, characterized in that: The arcuate baffle group includes a first arcuate baffle, a second arcuate baffle and a third arcuate baffle of equal length; Wherein, the first arcuate baffle and the third arcuate baffle are fixed above the inner wall of the shell, The second arcuate baffle is fixed below the inner wall of the shell.

4. A heat exchanger with double-notched guide plates as claimed in claim 2, characterized in that: The double-notch guide plate group includes a plurality of reverse "Z"-shaped double-notch guide plates and a plurality of "Z"-shaped double-notch guide plates.

5. A heat exchanger with double-notched guide plates as claimed in claim 4, characterized in that: The inverted "Z"-shaped double-notch guide plate and the plurality of "Z"-shaped double-notch guide plates are arranged in a mirror image with respect to the second bow-shaped deflector plate.

6. A heat exchanger with double-notched guide plates as claimed in claim 5, characterized in that: The plurality of inverted "Z"-shaped double-notch guide plates are arranged in sequence and at equal intervals between the first arcuate baffle and the second arcuate baffle in a direction parallel to and perpendicular to the heat exchange tube; The plurality of "Z"-shaped double-notch guide plates are arranged in sequence and at equal intervals between the second bow-shaped baffle plate and the third bow-shaped baffle plate in a direction parallel to the heat exchange tube and a direction perpendicular to the heat exchange tube.

7. A heat exchanger with double-notched guide plates as claimed in claim 1, characterized in that: The spacing between the bow-shaped baffle group and the double-notch baffle group in the composite baffle group is 10 mm to 50 mm.

8. A heat exchanger with double-notched guide plates as claimed in claim 1, characterized in that: The inverted "Z"-shaped double-notch guide plate and the "Z"-shaped double-notch guide plate in the double-notch guide plate group have a notch width of 5mm to 20mm and a notch depth of 10mm to 30mm; The notch width is the horizontal distance of the notches on the double-notch guide plate group along the fluid flow direction; the depth is the vertical distance of the notches on the double-notch guide plate perpendicular to the fluid flow direction.

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