Primary brine preheating high-efficiency energy-saving heater
By incorporating rotatable disturbance wheels and blades within the shell, the temperature and velocity boundary layers are disrupted, promoting turbulence and solving the problem of low heat transfer efficiency in traditional shell-and-tube heat exchangers. This achieves high-efficiency heat transfer and reduces the consumption of high-temperature heat sources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENJIANG SALINIZATION CO LTD OF CHINA NATALT IND
- Filing Date
- 2025-06-13
- Publication Date
- 2026-07-10
AI Technical Summary
Traditional shell-and-tube heat exchangers suffer from a problem in the primary brine preheating process: the high-temperature fluid in the shell side forms a stable temperature and velocity boundary layer, which leads to a decrease in the heat transfer coefficient and low heat transfer efficiency.
Multiple sets of rotatable disturbance wheels and a ring-shaped array of disturbance blades are installed inside the shell. The disturbance wheels are rotated by the impact of the high-temperature fluid, which breaks the temperature and velocity boundary layer, promotes the turbulence effect, enhances the heat transfer and exchange between the high-temperature fluid and the outside of the heat exchange pipe, and achieves a more efficient heat transfer.
It achieves a significant improvement in heat transfer efficiency. By setting multiple sets of rotatable disturbance wheels and their annular array of disturbance blades inside the shell, the temperature and velocity boundary layers are broken, which promotes more complete forced convection heat transfer between the high-temperature fluid and the outer wall of the heat exchange pipe. This significantly improves the heat transfer coefficient and heat transfer efficiency, and reduces the amount of high-temperature heat source required to reach the target preheating temperature.
Smart Images
Figure CN224480064U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a high-efficiency and energy-saving heater for primary brine preheating. Background Technology
[0002] In the primary brine preheating process of the chlor-alkali chemical industry, shell-and-tube heat exchangers are widely used due to their stable structure and strong pressure resistance. However, during the operation of traditional heaters, the high-temperature fluid in the shell side tends to form stable temperature and velocity boundary layers as it flows through the outer wall of the heat exchange tubes, leading to increased thermal resistance near the wall and a significant decrease in the heat transfer coefficient. In view of this, this invention proposes a high-efficiency and energy-saving heater for primary brine preheating to solve the above problems. Utility Model Content
[0003] The purpose of this invention is to provide a high-efficiency and energy-saving heater for primary brine preheating, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A high-efficiency and energy-saving heater for primary brine preheating includes a shell, with pipe boxes at both ends of the shell, and multiple sets of heat exchange pipes inside the shell;
[0006] The housing is equipped with multiple sets of disturbance wheels, each with two sets of support rings connected to the inner wall of the housing. The disturbance wheels are rotatably positioned between the two sets of support rings. Each disturbance wheel is equipped with multiple sets of disturbance blades arranged in a circular array. The flow of high-temperature fluid inside the housing impacts the disturbance blades, causing the disturbance wheels to rotate between the two sets of support rings and thus cause disturbance.
[0007] As an improvement to the above technical solution, the disturbance wheel includes two sets of supporting and fixing rings, and multiple sets of disturbance blades are arranged between the two sets of supporting and fixing rings.
[0008] As an improvement to the above technical solution, a connecting fixing ring is provided inside the supporting fixing ring, and the connecting fixing ring and the supporting fixing ring are coaxially arranged. The multiple sets of disturbance blades are also connected to two sets of connecting fixing rings.
[0009] As an improvement to the above technical solution, a connecting ring is provided inside the support ring, and the support ring and the connecting ring are coaxially arranged;
[0010] A reinforcing plate is provided between the support ring and the connecting ring.
[0011] As an improvement to the above technical solution, a support annular groove is provided on the support ring;
[0012] The supporting fixing ring is provided with a supporting protrusion, which is rotatably disposed in the supporting annular groove.
[0013] As an improvement to the above technical solution, a connecting annular groove is provided on the connecting ring;
[0014] The connecting fixing ring is provided with a connecting protrusion, which is rotatably disposed in the connecting annular groove.
[0015] As an improvement to the above technical solution, a fan-shaped baffle is provided on the inner ring of the connecting ring, and the fan-shaped baffle is fixedly connected to the connecting ring;
[0016] The arc surfaces of the multiple sets of fan-shaped baffles are arranged in an alternating vertical orientation within the inner cavity of the shell, and the multiple sets of heat exchange pipes are connected to the fan-shaped baffles.
[0017] As an improvement to the above technical solution, the housing is provided with a fluid inlet pipe and a fluid outlet pipe;
[0018] Multiple sets of the aforementioned disturbance wheels are evenly arranged between the pipe axes of the fluid inlet pipe and the fluid outlet pipe.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] By using multiple sets of rotatable disturbance wheels and their annular array of disturbance blades set inside the shell, the fluid passively rotates under the impact of high-temperature fluid flow, forming a continuous and dynamic disturbance to the fluid in the shell. This design effectively disrupts the temperature boundary layer and velocity boundary layer of the fluid in the shell, enhances the turbulence effect, and promotes more complete forced convection heat transfer between the high-temperature fluid and the outer wall of the heat exchange pipe, significantly improving the heat transfer coefficient of the shell and thus greatly improving the overall heat exchange efficiency.
[0021] The improved heat exchange efficiency directly reduces the consumption of high-temperature heat sources (such as steam or high-temperature process fluids) required to reach the target preheating temperature. Under the same throughput and temperature rise requirements, the heat exchanger can reduce the flow rate of high-temperature fluids or lower their inlet temperature requirements, thereby effectively reducing the preheating energy consumption per unit product and meeting the design goal of high efficiency and energy saving. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a side view of the present invention;
[0024] Figure 3 This utility model Figure 2 Sectional view of AA;
[0025] Figure 4This is a side view of the disturbance wheel of this utility model;
[0026] Figure 5 This utility model Figure 4 Sectional view of BB;
[0027] Figure 6 This utility model Figure 5 Enlarged structural diagram at point C;
[0028] Figure 7 This is a schematic diagram showing the positions of the disturbance blade and support ring of this utility model;
[0029] Figure 8 This is a schematic diagram of the support ring structure of this utility model;
[0030] Figure 9 This utility model Figure 8 Enlarged structural diagram at point D;
[0031] Figure 10 This is a schematic diagram of the structure of the disturbance blade and disturbance wheel of this utility model;
[0032] Figure 11 This utility model Figure 10 A magnified structural diagram at point E in the middle.
[0033] In the diagram: 10. Shell; 11. Fluid inlet pipe; 12. Fluid outlet pipe; 13. Heat exchange pipe; 20. Tube box; 30. Disturbing wheel; 31. Support fixing ring; 32. Support protrusion; 33. Connecting fixing ring; 34. Connecting protrusion; 40. Support ring; 41. Support annular groove; 50. Disturbing blade; 60. Reinforcing plate; 70. Connecting ring; 71. Baffle plate; 72. Connecting annular groove. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0035] Example:
[0036] like Figure 1-10 As shown, this embodiment proposes a high-efficiency and energy-saving heater for primary brine preheating, including a shell 10, with pipe boxes 20 at both ends of the shell 10, and multiple sets of heat exchange pipes 13 arranged inside the shell 10;
[0037] The housing 10 is provided with multiple sets of disturbance wheels 30, and each disturbance wheel 30 is provided with two sets of support rings 40. The support rings 40 are connected to the inner wall of the housing 10. The disturbance wheel 30 is rotatably disposed between the two sets of support rings 40. The disturbance wheel 30 is provided with multiple sets of disturbance blades 50, which are arranged in a ring array on the disturbance wheel 30. The high-temperature fluid flowing inside the housing 10 impacts the disturbance blades 50, causing the disturbance wheel 30 to rotate between the two sets of support rings 40 to cause disturbance.
[0038] In this embodiment, during the brine preheating process, brine is introduced into the tube box 20, so that the brine enters the heat exchange pipe 13 through the tube box 20 and is discharged from another set of tube boxes 20. At the same time, high-temperature fluid is introduced into the shell 10, and the heat exchange process is completed through the contact between the high-temperature fluid and the heat exchange pipe 13, thereby completing the preheating process.
[0039] Of course, when the high-temperature fluid flows in the shell 10, the flow of the high-temperature fluid impacts the disturbance blades 50, causing the disturbance wheel 30 to rotate between the two sets of support rings 40 to cause disturbance. With the cooperation of multiple sets of disturbance blades 50 and disturbance wheel 30, the high-temperature fluid can fully contact and exchange heat with the heat exchange pipe 13.
[0040] By setting multiple sets of rotatable disturbance wheels 30 and their annular array of disturbance blades 50 inside the shell 10, the fluid passively rotates under the impact of high-temperature fluid flow, forming a continuous and dynamic disturbance to the fluid in the shell 10. This design effectively destroys the temperature boundary layer and velocity boundary layer of the fluid in the shell 10, enhances the turbulence effect, and promotes more sufficient forced convection heat transfer between the high-temperature fluid and the outer wall of the heat exchange pipe 13, significantly improving the heat transfer coefficient of the shell 10, thereby greatly improving the overall heat exchange efficiency.
[0041] The improved heat exchange efficiency directly reduces the consumption of high-temperature heat sources (such as steam or high-temperature process fluids) required to reach the target preheating temperature. Under the same throughput and temperature rise requirements, the heat exchanger can reduce the flow rate of high-temperature fluids or lower their inlet temperature requirements, thereby effectively reducing the preheating energy consumption per unit product and meeting the design goal of high efficiency and energy saving.
[0042] Specifically, the disturbance wheel 30 includes two sets of support and fixing rings 31, and multiple sets of disturbance blades 50 are disposed between the two sets of support and fixing rings 31.
[0043] In this embodiment, two sets of supporting and fixing rings 31 serve as the frame foundation, and the ends of multiple sets of disturbance blades 50 are rigidly connected between the two rings to form a stable axial support structure. This design significantly improves the bending stiffness and deformation resistance of the disturbance blades 50 under high-speed rotation and fluid impact, ensuring that the disturbance blades 50 maintain accurate geometric shape and installation angle during long-term operation, avoiding fatigue failure caused by vibration or stress, and ensuring the durability and reliability of the turbulence effect.
[0044] Specifically, a connecting fixing ring 33 is provided inside the supporting fixing ring 31. The connecting fixing ring 33 and the supporting fixing ring 31 are coaxially arranged, and the multiple sets of disturbance blades 50 are also connected to two sets of connecting fixing rings 33.
[0045] In this embodiment, by setting a connecting fixing ring 33 coaxial with the supporting fixing ring 31, a double-ring cooperative support structure is formed, which expands the support point of each disturbance blade 50 from the traditional single-ring connection to a double-ring double connection, greatly improving the bending stiffness of the disturbance blade 50 under high-speed rotation and fluid impact, effectively suppressing dynamic instability phenomena such as flutter and vortex-induced vibration of the disturbance blade 50, and ensuring the structural integrity and fatigue resistance of long-term operation.
[0046] Specifically, a connecting ring 70 is provided inside the support ring 40, and the support ring 40 and the connecting ring 70 are coaxially arranged;
[0047] A reinforcing plate 60 is provided between the support ring 40 and the connecting ring 70.
[0048] Specifically, the support ring 40 is provided with a support annular groove 41;
[0049] The support fixing ring 31 is provided with a support protrusion 32, which is rotatably disposed in the support annular groove 41.
[0050] Specifically, the connecting ring 70 is provided with a connecting annular groove 72;
[0051] The connecting fixing ring 33 is provided with a connecting protrusion 34, which is rotatably disposed in the connecting annular groove 72.
[0052] In this embodiment, a spatial truss support frame is formed by the coaxial nesting structure of the support ring 40 and the connecting ring 70 and the reinforcing plate 60 between them. This can significantly improve the radial stiffness and torsional strength of the support ring 40, effectively suppress the deformation of the support structure caused by the impact of high pressure and high temperature fluid in the shell 10, ensure the geometric stability of the rotation center of the disturbance wheel 30, and provide a high-precision reference for rotational disturbance.
[0053] Of course, the support protrusion 32 of the support ring 31 and the support annular groove 41 of the support ring 40 constitute the first-level rotating pair, which undertakes the main load-bearing and radial positioning functions. The connecting protrusion 34 of the connecting ring 33 and the connecting annular groove 72 of the connecting ring 70 constitute the second-level rotating pair, which provides auxiliary support and axial constraint. The coaxial collaborative design of the two rotating pairs disperses the rotational load to the rigid frame composed of the support ring 40 and the connecting ring 70, which greatly reduces the contact stress and frictional resistance of a single rotating pair, and realizes the smooth, low-noise and highly sensitive rotational motion of the disturbance wheel 30.
[0054] Specifically, a fan-shaped baffle 71 is provided on the inner ring of the connecting ring 70, and the fan-shaped baffle 71 is fixedly connected to the connecting ring 70;
[0055] Multiple sets of fan-shaped baffles 71 are arranged in an alternating vertical orientation within the inner cavity of the shell 10, and multiple sets of heat exchange pipes 13 are connected to the fan-shaped baffles 71.
[0056] In this case, the arc-shaped baffles 71 are arranged alternately with one group facing the top and another group facing the bottom, so that the arc-shaped surfaces are arranged alternately in the inner cavity of the housing 10 to perform baffle treatment.
[0057] In this embodiment, multiple sets of fan-shaped baffles 71 are arranged in an alternating arc shape on the inner ring of the connecting ring 70 (i.e., the arc surfaces of adjacent baffles 71 face the top and bottom of the shell 10 respectively), forming a continuously changing serpentine flow channel. This design forces the high-temperature fluid in the shell side to repeatedly reverse its flow direction by 180° when flowing through each baffle 71, generating high-intensity vortices and turbulence, completely destroying the laminar boundary layer, significantly improving the radial mixing degree and turbulent kinetic energy level of the fluid, and increasing the heat transfer coefficient of the outer wall of the heat exchange pipe 13. Of course, the fan-shaped baffles 71 and the disturbance wheel 30 are coaxially integrated in the connecting ring 70 to form a dual-mode enhanced heat transfer system of "static baffles + dynamic disturbance".
[0058] Specifically, the housing 10 is provided with a fluid inlet pipe 11 and a fluid outlet pipe 12;
[0059] Multiple sets of the disturbance wheels 30 are evenly arranged between the pipe axes of the fluid inlet pipe 11 and the fluid outlet pipe 12.
[0060] In this embodiment, multiple sets of disturbance wheels 30 are evenly and uniformly arranged along the axial centerline from the fluid inlet pipe 11 to the fluid outlet pipe 12 along the fluid flow direction, so that the shell-side flow field obtains continuous and consistent rotational disturbance force in each axial section. This design completely eliminates the excessive turbulence in the inlet section and laminarization in the outlet section caused by traditional single-point disturbance, ensuring the uniformity of fluid turbulent kinetic energy distribution along the pipe and achieving efficient heat transfer along the entire length of the heat exchange pipe 13.
[0061] Of course, the first set of disturbance wheels 30 located on the extended axis of the fluid inlet pipe 11 directly faces the high-speed jet to form an active kinetic energy buffer barrier. Its annular array of disturbance blades 50 efficiently converts the axial impact force of the fluid into rotational torque, which can eliminate the direct erosion damage and water hammer effect of the high-speed fluid on the heat exchange pipe 13 behind it.
[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-efficiency and energy-saving heater for primary brine preheating, characterized in that: Includes a shell (10), with pipe boxes (20) at both ends of the shell (10), and multiple sets of heat exchange pipes (13) are provided inside the shell (10). Multiple sets of disturbance wheels (30) are provided inside the housing (10). Two sets of support rings (40) are provided on the disturbance wheels (30). The support rings (40) are connected to the inner wall of the housing (10). The disturbance wheels (30) are rotatably disposed between the two sets of support rings (40). Multiple sets of disturbance blades (50) are provided on the disturbance wheels (30). The multiple sets of disturbance blades (50) are arranged in a ring array on the disturbance wheels (30). The high-temperature fluid flow inside the housing (10) impacts the disturbance blades (50), causing the disturbance wheels (30) to rotate between the two sets of support rings (40) to cause disturbance.
2. The high-efficiency energy-saving heater for primary brine preheating according to claim 1, characterized in that: The disturbance wheel (30) includes two sets of support and fixing rings (31), and multiple sets of disturbance blades (50) are arranged between the two sets of support and fixing rings (31).
3. The high-efficiency energy-saving heater for primary brine preheating according to claim 2, characterized in that: The supporting fixing ring (31) is provided with a connecting fixing ring (33). The connecting fixing ring (33) and the supporting fixing ring (31) are coaxially arranged. The multiple sets of disturbance blades (50) are also connected to two sets of connecting fixing rings (33).
4. The high-efficiency energy-saving heater for primary brine preheating according to claim 3, characterized in that: A connecting ring (70) is provided inside the support ring (40), and the support ring (40) and the connecting ring (70) are coaxially arranged; A reinforcing plate (60) is provided between the support ring (40) and the connecting ring (70).
5. The high-efficiency energy-saving heater for primary brine preheating according to claim 4, characterized in that: The support ring (40) is provided with a support annular groove (41). The support fixing ring (31) is provided with a support protrusion (32), which is rotatably disposed in the support annular groove (41).
6. The high-efficiency energy-saving heater for primary brine preheating according to claim 5, characterized in that: The connecting ring (70) is provided with a connecting annular groove (72); The connecting fixing ring (33) is provided with a connecting protrusion (34), which is rotatably disposed in the connecting annular groove (72).
7. The high-efficiency energy-saving heater for primary brine preheating according to claim 6, characterized in that: A fan-shaped baffle (71) is provided on the inner ring of the connecting ring (70), and the fan-shaped baffle (71) is fixedly connected to the connecting ring (70); The arc surfaces of the multiple sets of fan-shaped baffles (71) are arranged in an alternating vertical orientation in the inner cavity of the shell (10), and the multiple sets of heat exchange pipes (13) are connected to the fan-shaped baffles (71).
8. The high-efficiency energy-saving heater for primary brine preheating according to claim 7, characterized in that: The housing (10) is provided with a fluid inlet pipe (11) and a fluid outlet pipe (12). Multiple sets of the aforementioned disturbance wheels (30) are evenly arranged between the pipe axes of the fluid inlet pipe (11) and the fluid outlet pipe (12).