A shell and tube heat exchanger based on fluid product sterilization process

Abstract

This invention discloses a shell-and-tube heat exchanger based on a fluid product sterilization process, belonging to the field of heat exchanger technology. The invention includes an internal exhaust pipe assembly and an external cooling pipe assembly. The external cooling pipe assembly includes a flow compensator and a low-temperature compensator. The flow compensator is driven by cooling water flow. The flow compensator includes an arc-shaped opening and closing plate, and the low-temperature compensator includes an inclined water pipe. The inclined water pipe is arranged obliquely towards the cooling water flow direction. The outer wall of the arc-shaped opening and closing plate is adapted to the inclined water pipe. During heat exchange, the cooling water flow drives the arc-shaped opening and closing plate to rotate, achieving intermittent opening and closing of the inclined water pipe, allowing external cooling water to intermittently mix in, thereby reducing the temperature rise rate of the cooling water during heat exchange. By setting a flow compensator inside the cooling pipe and an obliquely arranged low-temperature compensator outside the cooling pipe towards the cooling water flow direction, this invention can achieve multi-point replenishment of cooling water in the cooling pipe during heat exchange, significantly reducing the temperature rise rate of the cooling water in the cooling pipe.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger technology, and in particular relates to a shell-and-tube heat exchanger based on a fluid product sterilization process. Background Technology

[0002] In the food processing industry, sterilization is often necessary to control food safety during production. High-temperature steam is commonly used in the production of fluid products for sterilization, as it provides higher and more uniform heating, resulting in better sterilization.

[0003] After high-temperature steam sterilization of fluid products, a shell-and-tube heat exchanger needs to be installed at the downstream end for heat exchange. Existing shell-and-tube heat exchangers generally consist of an inner shell and an outer shell. The medium to be heated flows from top to bottom in the inner shell, while the cooling medium flows from bottom to top in the outer shell, thus achieving heat exchange.

[0004] However, in existing shell-and-tube heat exchangers, the temperature of the cooling medium inside the outer tube gradually increases due to heat exchange, thereby reducing the temperature difference between the cooling medium and the medium requiring heat exchange in the inner tube. This leads to a gradual decrease in the cooling and heat exchange efficiency of the cooling medium inside the outer tube. To address this issue, we provide a shell-and-tube heat exchanger based on a fluid product sterilization process to solve the aforementioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a shell-and-tube heat exchanger based on a fluid product sterilization process. By specifically designing the maintaining tube assembly, the internal exhaust tube assembly, the external cooling tube assembly, the flow compensator, the low-temperature compensator, the first connecting assembly, and the second connecting assembly, the problems in the background art mentioned above are solved.

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] This invention relates to a shell-and-tube heat exchanger based on a fluid product sterilization process, comprising a holding tube assembly and a heat exchange tube set; wherein, the heat exchange tube set includes an inner exhaust tube assembly and an outer cooling tube assembly, the inner exhaust tube assembly being connected to the lower end of the holding tube assembly, allowing steam to enter the inner exhaust tube assembly through the holding tube assembly, and the outer cooling tube assembly being sleeved outside the inner exhaust tube assembly; steam flows from top to bottom through the inner exhaust tube assembly, and cooling water flows from bottom to top through the outer cooling tube assembly, with the steam flow rate in the inner exhaust tube assembly being less than the cooling water flow rate in the outer cooling tube assembly.

[0008] The external cooling pipe assembly includes a flow compensator and a low-temperature compensator. The flow compensator is driven by the flow of cooling water. The flow compensator includes an arc-shaped opening and closing plate, and the low-temperature compensator includes an inclined water pipe. The inclined water pipe is arranged obliquely in the direction of the cooling water flow. The outer wall of the arc-shaped opening and closing plate is clearance-fitted with one end of the inclined water pipe. During the heat exchange process through the flow of cooling water, the cooling water flow drives the arc-shaped opening and closing plate to achieve intermittent opening and closing of the inclined water pipe, so that the external cooling water is intermittently mixed in to reduce the temperature rise rate of the cooling water during the heat exchange process.

[0009] The present invention is further configured such that the external cooling pipe assembly includes a lower U-shaped cooling sleeve and an upper U-shaped cooling sleeve arranged longitudinally; wherein, the lower U-shaped cooling sleeve includes a first cooling pipe and a second cooling pipe arranged opposite to each other, the first cooling pipe is provided with a parallel water inlet pipe and a water outlet pipe on its periphery, the second cooling pipe is provided with a perpendicular water inlet pipe and a water outlet pipe on its periphery, the end of the water inlet pipe is connected to a first sealing disc, the end of the water outlet pipe is connected to a second sealing disc, and the second sealing disc of the first cooling pipe is adapted to the first sealing disc of the second cooling pipe.

[0010] The present invention is further configured such that the upper U-shaped cooling sleeve includes two second cooling pipes arranged opposite to each other, and water inlet pipes and water outlet pipes perpendicular to each other are respectively arranged on the periphery of the second cooling pipes. The vertically adjacent second sealing discs are adapted to the first sealing discs, and the horizontally adjacent second sealing discs are adapted to the first sealing discs.

[0011] The invention is further configured such that the low-temperature compensator also includes a vertical double-through pipe connected to one end of the inclined water pipe, and a first control valve and a second control valve are respectively provided on the periphery of the vertical double-through pipe located on the upper and lower sides of the inclined water pipe; the end of the inclined water pipe away from the vertical double-through pipe is installed on the periphery of the corresponding cooling pipe, and the included angle between the inclined water pipe and the corresponding cooling pipe is 30-60°.

[0012] The present invention is further configured such that the flow compensator includes a first mounting ring and a second mounting ring fixedly disposed at both ends of the arc-shaped opening and closing plate, the outer wall of the second mounting ring is fixed with a rotating ring rotatably connected to the inside of the corresponding cooling pipe, the inner wall of the second mounting ring is provided with a vortex speed-increasing impeller, and the inner wall of the first mounting ring is evenly distributed with a plurality of curved force-bearing components along the circumferential direction.

[0013] The invention is further configured such that the flow compensator includes a support ring fixed inside the corresponding cooling pipe. The inner wall of the support ring is connected to a U-shaped baffle and an axial rotating shaft via a support rod. A first bevel gear is fixedly arranged on the circumferential side of the axial rotating shaft. A second bevel gear meshes with the first bevel gear on its circumferential side. A radial rotating shaft that is rotatably connected to the inner wall of the support ring is fixed at one end of the second bevel gear. A water flow-driven impeller that is adapted to the position of the U-shaped baffle is fixed on the circumferential side of the radial rotating shaft. A support disk is fixed at one end of the axial rotating shaft. Multiple push plates for circumferentially pushing curved force-bearing components are evenly distributed on the circumferential side of the support disk.

[0014] The present invention is further configured such that the maintaining pipe assembly includes a steam inlet pipe and a plurality of steam delivery pipes, the end of the steam inlet pipe is connected to the front end of an adjacent steam delivery pipe through a U-shaped air guide pipe, and the end of the steam delivery pipe is connected to the front end of an adjacent steam delivery pipe through a U-shaped air guide pipe; a second sealing disc is connected to the end of the steam inlet pipe and both ends of the steam delivery pipes, and a first sealing disc is connected to both ends of the U-shaped air guide pipe, wherein the first sealing discs at both ends of the U-shaped air guide pipe are respectively adapted to the corresponding second sealing discs.

[0015] The present invention is further configured such that the internal exhaust pipe assembly includes a steam discharge pipe and a plurality of steam conveying pipes, the front end of the steam discharge pipe is connected to the end of the adjacent steam conveying pipe through a U-shaped air guide pipe, and the front end of the steam conveying pipe is connected to the end of the adjacent steam conveying pipe through a U-shaped air guide pipe; a second sealing disc is connected to the front end of the steam discharge pipe and both ends of the steam conveying pipe, and a first sealing disc is connected to both ends of the U-shaped air guide pipe, wherein the first sealing discs at both ends of the U-shaped air guide pipe are respectively adapted to the corresponding second sealing discs.

[0016] The present invention is further configured such that a plurality of first connecting holes are evenly distributed around the surface of the first sealing disc, and a limiting groove is provided on the inner wall of the first connecting hole; a first connecting assembly is provided inside the first connecting hole, the first connecting assembly includes an internally threaded tube and a first guide seat rotatably disposed on its periphery, the first guide seat slides in cooperation with the corresponding limiting groove, and a force-driven rotating head is fixed at one end of the internally threaded tube.

[0017] The invention is further configured such that a plurality of limiting cavities are evenly distributed annularly on the surface of the second sealing disc, and a second connecting hole is provided inside the limiting cavity. A limiting groove is provided on the inner wall of the second connecting hole. A second connecting assembly is provided inside the second connecting hole. The second connecting assembly includes a threaded connecting post and a second guide seat fixedly disposed on its periphery. The second guide seat slides in cooperation with the corresponding limiting groove. A positioning disc adapted to the limiting cavity is fixed at one end of the threaded connecting post. A first magnet is provided on the surface of the first guide seat, and a second magnet is provided on the surface of the second guide seat that is magnetically attracted to the corresponding first magnet. The internal threaded tube is threaded in cooperation with the corresponding threaded connecting post.

[0018] The present invention has the following beneficial effects:

[0019] 1. This invention provides a flow compensator inside the cooling pipe and a low-temperature compensator obliquely positioned outside the cooling pipe in the direction of cooling water flow. When the cooling water flows, the flow energy of the water drives the flow compensator to rotate, enabling the arc-shaped opening and closing plate to intermittently open and close the oblique water pipe. This allows for multi-point replenishment of cooling water in the cooling pipe during the heat exchange process, significantly reducing the heating rate of the cooling water in the cooling pipe and ensuring the heat exchange effect of the cooling pipe.

[0020] 2. This invention installs a flow compensator inside the cooling pipe. When the cooling water flows from bottom to top, the cooling water flow drives the impeller to rotate. With the cooperation of the second bevel gear and the first bevel gear, the rotary push plate rotates. Then, under the action of the rotary push plate, the vortex speed-increasing impeller rotates. When the vortex speed-increasing impeller rotates, it can accelerate the upward flow velocity of the cooling water, thereby compensating for the flow loss in the inlet and outlet pipes and ensuring the flow rate of the cooling water in the entire external cooling pipe assembly.

[0021] 3. This invention installs a flow compensator inside the cooling pipe. When the cooling water flows from top to bottom, the cooling water flow drives the water flow to rotate the impeller in the opposite direction. With the cooperation of the second bevel gear and the first bevel gear, the rotary push plate rotates in the opposite direction. Then, under the action of the rotary push plate, the vortex speed-increasing impeller rotates in the opposite direction. When the vortex speed-increasing impeller rotates in the opposite direction, it can accelerate the downward flow speed of the cooling water, which can realize the rapid discharge of cooling water in the entire external cooling pipe group.

[0022] 4. In the process of accelerating the downward flow of cooling water by the reverse rotation of the vortex speed-up impeller, the second control valve at different positions can be opened, which can increase the number of drain ports on the entire external cooling pipe assembly and help improve the discharge efficiency of the cooling water after heat exchange in the external cooling pipe assembly.

[0023] 5. This invention uses a combination of a flow compensator and a low-temperature compensator to accelerate the flow rate of cooling water while intermittently replenishing external cooling water. The replenished cooling water flows rapidly to the rear end under the action of the flow compensator, thereby accelerating the dispersion speed of the replenished cooling water in the entire external cooling pipe assembly, so as to ensure the cooling heat exchange efficiency of the entire external cooling pipe assembly.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a shell-and-tube heat exchanger based on a fluid product sterilization process.

[0027] Figure 2 for Figure 1 The left view of the structure.

[0028] Figure 3 for Figure 1 A schematic diagram of the heat exchanger tube assembly.

[0029] Figure 4 for Figure 1 A schematic diagram of the structure of the middle maintenance tube assembly.

[0030] Figure 5 This diagram illustrates the coordinated use of the flow compensator and the cryogenic compensator in this invention.

[0031] Figure 6 for Figure 5 A structural diagram from another angle.

[0032] Figure 7 for Figure 5 The front view of the structure.

[0033] Figure 8 This diagram illustrates the interaction between the second cooling pipe, the flow compensator, and the cryogenic compensator in this invention.

[0034] Figure 9 for Figure 8 Top view of the structure.

[0035] Figure 10 This is a schematic diagram of the steam inlet pipe in this invention.

[0036] Figure 11 This is a cross-sectional view of the steam conveying pipe in this invention.

[0037] Figure 12 This is a schematic diagram of the structure of the second connecting component in this invention.

[0038] Figure 13 This is a schematic diagram of the structure of the first connecting component in this invention.

[0039] Figure 14 This diagram illustrates the interaction between the U-shaped air guide tube and the first connecting component in this invention.

[0040] The attached diagram lists the components represented by each number as follows:

[0041] 1-Maintaining pipe assembly, 2-Heat exchanger tube bundle, 3-Internal exhaust pipe assembly, 4-External cooling pipe assembly, 5-Flow compensator, 501-Arc-shaped opening and closing plate, 502-First mounting ring, 503-Second mounting ring, 504-Rotating ring, 505-Vortex speed-increasing impeller, 506-Curved surface force-bearing component, 507-Support ring, 508-U-shaped baffle plate, 509-First bevel gear, 510-Second bevel gear, 511-Radial rotating shaft, 512-Water flow driven impeller, 513-Rotating push plate, 6-Low temperature compensator, 601-Inclined water pipe, 602-Vertical double-through pipe, 603-First control valve, 60 4-Second control valve, 7-First cooling pipe, 8-Second cooling pipe, 9-Inlet pipe, 10-Outlet pipe, 11-First sealing plate, 12-Second sealing plate, 121-Limiting cavity, 122-Second connecting hole, 13-Steam inlet pipe, 14-Steam delivery pipe, 15-U-shaped air guide pipe, 16-Steam outlet pipe, 17-First connecting assembly, 171-Internal threaded pipe, 172-First guide seat, 173-Force-driven rotating head, 174-First magnet, 18-Second connecting assembly, 181-Threaded connecting post, 182-Second guide seat, 183-Positioning plate, 184-Second magnet. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figure 1-14The present invention is a shell-and-tube heat exchanger based on a fluid product sterilization process, comprising a holding tube assembly 1 and a heat exchange tube assembly 2. The heat exchange tube assembly 2 includes an inner exhaust tube assembly 3 and an outer cooling tube assembly 4. The inner exhaust tube assembly 3 is connected to the lower end of the holding tube assembly 1, so that high-temperature steam enters the inner exhaust tube assembly 3 through the holding tube assembly 1. The outer cooling tube assembly 4 is sleeved outside the inner exhaust tube assembly 3 to achieve heat exchange treatment of the steam.

[0044] Steam flows from top to bottom through the internal exhaust pipe assembly 3, and cooling water flows from bottom to top through the external cooling pipe assembly 4. The steam flow rate in the internal exhaust pipe assembly 3 is less than the cooling water flow rate in the external cooling pipe assembly 4. When it is necessary to discharge the heat-exchanged cooling water in the external cooling pipe assembly 4, the cooling water flows from top to bottom through the external cooling pipe assembly 4.

[0045] The external cooling pipe assembly 4 includes a flow compensator 5 and a low-temperature compensator 6. The flow compensator 5 is driven by the cooling water flow. Through the combined use of the flow compensator 5 and the low-temperature compensator 6, the external cooling water is intermittently replenished while accelerating the cooling water flow rate. The replenished cooling water flows rapidly to the rear end under the action of the flow compensator, thereby accelerating the dispersion speed of the replenished cooling water in the entire external cooling pipe assembly, so as to ensure the cooling heat exchange efficiency of the entire external cooling pipe assembly.

[0046] The flow compensator 5 includes an arc-shaped opening and closing plate 501, and the low-temperature compensator 6 includes an inclined water pipe 601. The inclined water pipe 601 is arranged obliquely towards the direction of cooling water flow. The outer wall of the arc-shaped opening and closing plate 501 is in clearance fit with one end of the inclined water pipe 601. During the heat exchange process through the flow of cooling water, the cooling water flow drives the arc-shaped opening and closing plate 501 to rotate, thereby intermittently opening and closing the inclined water pipe 601, so that the external cooling water is intermittently mixed in to weaken the heating rate of the cooling water during the heat exchange process.

[0047] In this embodiment of the invention, the external cooling pipe assembly 4 further includes a lower U-shaped cooling sleeve and an upper U-shaped cooling sleeve arranged longitudinally; wherein, the lower U-shaped cooling sleeve includes a first cooling pipe 7 and a second cooling pipe 8 arranged opposite to each other, cooling water enters from the first cooling pipe 7 into the adjacent (horizontal) second cooling pipe 8, the periphery of the first cooling pipe 7 is respectively provided with a parallel water inlet pipe 9 and a water outlet pipe 10, the periphery of the second cooling pipe 8 is respectively provided with a perpendicular water inlet pipe 9 and a water outlet pipe 10, the end of the water inlet pipe 9 is connected to a first sealing plate 11, the end of the water outlet pipe 10 is connected to a second sealing plate 12, and the second sealing plate 12 of the first cooling pipe 7 is adapted to the first sealing plate 11 of the second cooling pipe 8.

[0048] The upper U-shaped cooling sleeve includes two second cooling pipes 8 arranged opposite to each other. The second cooling pipes 8 are respectively provided with water inlet pipes 9 and water outlet pipes 10 that are perpendicular to each other. The vertically adjacent second sealing discs 12 and first sealing discs 11 are adapted to each other, and the horizontally adjacent second sealing discs 12 and first sealing discs 11 are adapted to each other.

[0049] Specifically, cooling water enters through the inlet pipe 9 on the first cooling pipe 7, flows through the outlet pipe 10 on the first cooling pipe 7 into the inlet pipe 9 on the adjacent second cooling pipe 8, then flows through the outlet pipe 10 on the second cooling pipe 8 into the inlet pipe 9 on the second cooling pipe 8 above it, and then flows through the outlet pipe 10 on the second cooling pipe 8 above it into the inlet pipe 9 on the horizontally adjacent second cooling pipe 8. In this way, the cooling water flows from bottom to top throughout the entire external cooling pipe assembly 4.

[0050] In this embodiment of the invention, the low-temperature compensator 6 further includes a vertical double-through pipe 602 connected to one end of the inclined water pipe 601. The vertical double-through pipe 602 is provided with a first control valve 603 and a second control valve 604 located on the upper and lower sides of the inclined water pipe 601, respectively. When the cooling water flows from bottom to top, the first control valve 603 at each position is opened, and when the cooling water flows from top to bottom, the second control valve 604 at each position is opened.

[0051] The oblique water pipe 601 is installed on the side of the corresponding cooling pipe at the end away from the vertical double-through pipe 602, and the angle between the oblique water pipe 601 and the corresponding cooling pipe is 30-60°; the upper port of the vertical double-through pipe 602 is connected to the external cold water tank at a high position through a connecting pipe, and the lower port of the vertical double-through pipe 602 is connected to the liquid collection tank at a low position through a connecting pipe.

[0052] In this embodiment of the invention, the flow compensator 5 further includes a first mounting ring 502 and a second mounting ring 503 fixedly disposed at both ends of the arc-shaped opening and closing plate 501. The outer wall of the second mounting ring 503 is fixed with a rotating ring 504 rotatably connected to the inside of the corresponding cooling pipe. The inner wall of the second mounting ring 503 is provided with a vortex speed-increasing impeller 505. The inner wall of the first mounting ring 502 is evenly distributed with a plurality of curved force-bearing members 506 along the circumferential direction.

[0053] The flow compensator 5 also includes a support ring 507 fixed inside the corresponding cooling pipe. The inner wall of the support ring 507 is connected to a U-shaped baffle 508 and an axial rotating shaft respectively via a support rod. A first bevel gear 509 is fixedly provided on the circumferential side of the axial rotating shaft. A second bevel gear 510 meshes with the circumferential side of the first bevel gear 509. A radial rotating shaft 511 is fixed at one end of the second bevel gear 510 and is rotatably connected to the inner wall of the support ring 507. A water flow driven impeller 512 that is adapted to the position of the U-shaped baffle 508 is fixed on the circumferential side of the radial rotating shaft 511.

[0054] A support disk is fixed at one end of the axial rotating shaft. Multiple push plates 513 are evenly distributed around the periphery of the support disk to circumferentially push the curved surface force-bearing component 506. By installing a flow compensator 5 inside the cooling pipe, when the cooling water flows from bottom to top, the cooling water flow drives the impeller 512 to rotate. The push plates 513 rotate under the cooperation of the second bevel gear 510 and the first bevel gear 509. During rotation, the push plates 513 can move along the curved surface of the curved surface force-bearing component 506, thereby pushing the component. The curved surface force-bearing component 506 moves in the circumferential direction. When the rotary push plate 513 disengages from the corresponding curved surface force-bearing component 506, the next rotary push plate 513 rotates onto the curved surface of the corresponding curved surface force-bearing component 506. In this way, the vortex speed-increasing impeller 505 is continuously rotated under the action of the rotary push plate 513. When the vortex speed-increasing impeller 505 rotates, it can accelerate the upward flow velocity of the cooling water, thereby compensating for the flow loss in the inlet and outlet pipes and ensuring the flow rate of the cooling water in the entire external cooling pipe assembly.

[0055] When the cooling water flows from top to bottom, the cooling water flow drives the impeller 512 to rotate in the opposite direction. With the cooperation of the second bevel gear 510 and the first bevel gear 509, the rotary push plate 513 rotates in the opposite direction. During this process, the rotary push plate 513 is always in contact with the side wall of the corresponding curved force-bearing component 506, which can also drive the corresponding curved force-bearing component 506 to move circumferentially. Then, under the action of the rotary push plate 513, the vortex speed-increasing impeller 505 is rotated in the opposite direction. When the vortex speed-increasing impeller 505 rotates in the opposite direction, it can accelerate the downward flow speed of the cooling water, which can realize the rapid discharge of cooling water in the entire external cooling pipe group 4.

[0056] In this embodiment of the invention, the maintaining pipe assembly 1 includes a steam inlet pipe 13 and a plurality of steam delivery pipes 14. The end of the steam inlet pipe 13 is connected to the front end of the adjacent steam delivery pipe 14 through a U-shaped air guide pipe 15. The end of the steam delivery pipe 14 is connected to the front end of the adjacent steam delivery pipe 14 through a U-shaped air guide pipe 15. The end of the steam inlet pipe 13 and both ends of the steam delivery pipe 14 are connected to a second sealing plate 12. Both ends of the U-shaped air guide pipe 15 are connected to a first sealing plate 11. The first sealing plate 11 at both ends of the U-shaped air guide pipe 15 is adapted to the corresponding second sealing plate 12.

[0057] Specifically, high-temperature steam enters through the steam inlet pipe 13, flows into the horizontally adjacent steam delivery pipe 14 through the connected U-shaped air guide pipe 15, and then flows into the steam delivery pipe 14 below the steam delivery pipe 14 through another U-shaped air guide pipe 15, thus realizing the flow of high-temperature steam from top to bottom in the entire holding pipe group 1.

[0058] In this embodiment of the invention, the internal exhaust pipe assembly 3 includes a steam exhaust pipe 16 and a plurality of steam conveying pipes 14. The front end of the steam exhaust pipe 16 is connected to the end of the adjacent steam conveying pipe 14 through a U-shaped air guide pipe 15, and the front end of the steam conveying pipe 14 is connected to the end of the adjacent steam conveying pipe 14 through a U-shaped air guide pipe 15.

[0059] The front end of the steam discharge pipe 16 and both ends of the steam delivery pipe 14 are connected to a second sealing disc 12, and both ends of the U-shaped air guide pipe 15 are connected to a first sealing disc 11. The first sealing disc 11 at both ends of the U-shaped air guide pipe 15 is adapted to the corresponding second sealing disc 12.

[0060] Specifically, high-temperature steam flows from the U-shaped air guide pipe 15 at the very end of the maintaining pipe group 1 into the steam delivery pipe 14 at the very top of the internal exhaust pipe group 3. The steam entering the steam delivery pipe 14 flows through the connected U-shaped air guide pipe 15 into the vertically adjacent steam delivery pipe 14, and then flows through another U-shaped air guide pipe 15 into the next steam delivery pipe 14. In this way, high-temperature steam flows from top to bottom throughout the entire internal exhaust pipe group 3, and finally flows out from the steam discharge pipe 16 after heat exchange.

[0061] In this embodiment of the invention, a plurality of first connecting holes are evenly distributed around the surface of the first sealing disc 11, and a limiting groove is provided on the inner wall of the first connecting hole; a first connecting assembly 17 is provided inside the first connecting hole, the first connecting assembly 17 includes an internally threaded tube 171 and a first guide seat 172 rotatably disposed on its periphery, the first guide seat 172 slides with the corresponding limiting groove, and a force-driven rotating head 173 is fixed at one end of the internally threaded tube 171. The force-driven rotating head 173 can be configured as a polygonal column, similar to the shape of a bolt head, so as to facilitate the rotation of the force-driven rotating head 173 by inserting and engaging a tool with the force-driven rotating head 173.

[0062] The surface of the second sealing disc 12 is evenly distributed with multiple limiting cavities 121 in a ring. The limiting cavity 121 is provided with a second connecting hole 122. The inner wall of the second connecting hole 122 is provided with a limiting channel. The second connecting hole 122 is provided with a second connecting assembly 18. The second connecting assembly 18 includes a threaded connecting post 181 and a second guide seat 182 fixedly disposed on its periphery. The second guide seat 182 slides with the corresponding limiting channel. One end of the threaded connecting post 181 is fixed with a positioning disc 183 that is adapted to the limiting cavity 121.

[0063] A first magnet 174 is provided on the surface of the first guide seat 172, and a second magnet 184 is provided on the surface of the second guide seat 182, which is magnetically attracted to the corresponding first magnet 174. The internal threaded tube 171 is threadedly engaged with the corresponding threaded connecting post 181. When adjacent first sealing discs 11 and second sealing discs 12 are coaxially attached together, the strong magnetic attraction of the first magnet 174 on the first connecting assembly 17 to the second magnet 184 on the second connecting assembly 184 causes the internal threaded tube 171 on the first connecting assembly 17 to be quickly inserted into the second sealing disc 12. In the second connecting hole 122 on the surface, the internal threaded tube 171 and the corresponding threaded connecting post 181 are coaxially engaged. The positioning disk 183 is engaged in the corresponding limiting cavity 121. The force-driven rotating head 173 is rotated by the tool, so that the internal threaded tube 171 is gradually threaded onto the corresponding threaded connecting post 181 until the force-driven rotating head 173 is tightly attached to the surface of the first sealing disk 11. At this time, the positioning disk 183 is also tightly attached to the limiting cavity 121, thereby realizing the rapid positioning and installation between the first sealing disk 11 and the second sealing disk 12.

[0064] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A shell-and-tube heat exchanger based on a fluid product sterilization process, characterized in that, include: Maintenance tube group (1), and The heat exchange tube assembly (2) includes an inner exhaust pipe assembly (3) and an outer cooling pipe assembly (4). The inner exhaust pipe assembly (3) is connected to the lower end of the holding pipe assembly (1), so that steam enters the inner exhaust pipe assembly (3) through the holding pipe assembly (1). The outer cooling pipe assembly (4) is sleeved on the outside of the inner exhaust pipe assembly (3). Steam flows from top to bottom through the internal exhaust pipe assembly (3), and cooling water flows from bottom to top through the external cooling pipe assembly (4). The steam flow rate in the internal exhaust pipe assembly (3) is less than the cooling water flow rate in the external cooling pipe assembly (4). The external cooling pipe assembly (4) includes a flow compensator (5) and a low temperature compensator (6), wherein the flow compensator (5) is driven by the flow of cooling water; The flow compensator (5) includes an arc-shaped opening and closing plate (501), and the low-temperature compensator (6) includes an inclined water pipe (601). The inclined water pipe (601) is arranged obliquely towards the direction of cooling water flow. The outer wall of the arc-shaped opening and closing plate (501) is in clearance fit with one end of the inclined water pipe (601). During the heat exchange process through the flow of cooling water, the cooling water flow drives the arc-shaped opening and closing plate (501) to rotate to realize the intermittent opening and closing of the inclined water pipe (601), so that the external cooling water is intermittently mixed in to weaken the heating rate of the cooling water during the heat exchange process.

2. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 1, characterized in that, The external cooling pipe assembly (4) further includes a lower U-shaped cooling sleeve and an upper U-shaped cooling sleeve arranged longitudinally; wherein, The lower U-shaped cooling sleeve includes a first cooling pipe (7) and a second cooling pipe (8) arranged opposite to each other. The first cooling pipe (7) is provided with a parallel water inlet pipe (9) and a water outlet pipe (10) on its periphery. The second cooling pipe (8) is provided with a perpendicular water inlet pipe (9) and a water outlet pipe (10) on its periphery. The end of the water inlet pipe (9) is connected to a first sealing disc (11), and the end of the water outlet pipe (10) is connected to a second sealing disc (12). The second sealing disc (12) of the first cooling pipe (7) is adapted to the first sealing disc (11) of the second cooling pipe (8).

3. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 2, characterized in that, The upper U-shaped cooling sleeve includes two second cooling pipes (8) arranged opposite to each other. The second cooling pipes (8) are respectively provided with water inlet pipes (9) and water outlet pipes (10) perpendicular to each other. The vertically adjacent second sealing discs (12) and the first sealing discs (11) are adapted to each other, and the horizontally adjacent second sealing discs (12) and the first sealing discs (11) are adapted to each other.

4. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 3, characterized in that, The low-temperature compensator (6) also includes a vertical double-through pipe (602) connected to one end of the inclined water pipe (601). The vertical double-through pipe (602) is provided with a first control valve (603) and a second control valve (604) located on the upper and lower sides of the inclined water pipe (601). The oblique water pipe (601) is installed on the periphery of the corresponding cooling pipe at the end away from the vertical double-through pipe (602), and the angle between the oblique water pipe (601) and the corresponding cooling pipe is 30-60°.

5. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 4, characterized in that, The flow compensator (5) further includes a first mounting ring (502) and a second mounting ring (503) fixedly disposed at both ends of the arc-shaped opening and closing plate (501). The outer wall of the second mounting ring (503) is fixed with a rotating ring (504) rotatably connected to the inside of the corresponding cooling pipe. The inner wall of the second mounting ring (503) is provided with a vortex speed-increasing impeller (505). The inner wall of the first mounting ring (502) is evenly distributed with a number of curved force-bearing components (506) along the circumferential direction.

6. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 5, characterized in that, The flow compensator (5) also includes a support ring (507) fixed inside the corresponding cooling pipe. The inner wall of the support ring (507) is connected to a U-shaped baffle (508) and an axial shaft respectively by a support rod. A first bevel gear (509) is fixedly provided on the circumferential side of the axial shaft. A second bevel gear (510) meshes with the circumferential side of the first bevel gear (509). A radial shaft (511) is fixed at one end of the second bevel gear (510) and is rotatably connected to the inner wall of the support ring (507). A water flow drive impeller (512) that matches the position of the U-shaped baffle (508) is fixed on the circumferential side of the radial shaft (511). One end of the axial rotating shaft is fixed with a support plate, and multiple push plates (513) for circumferentially pushing the curved force-bearing component (506) are evenly distributed around the support plate.

7. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 6, characterized in that, The maintenance pipe assembly (1) includes a steam inlet pipe (13) and several steam delivery pipes (14). The end of the steam inlet pipe (13) is connected to the front end of the adjacent steam delivery pipe (14) through a U-shaped air guide pipe (15). The end of the steam delivery pipe (14) is connected to the front end of the adjacent steam delivery pipe (14) through a U-shaped air guide pipe (15). The steam inlet pipe (13) and the steam delivery pipe (14) are both connected to a second sealing disc (12), and the U-shaped air guide pipe (15) is connected to a first sealing disc (11) at both ends. The first sealing disc (11) at both ends of the U-shaped air guide pipe (15) is adapted to the corresponding second sealing disc (12).

8. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 7, characterized in that, The internal exhaust pipe assembly (3) includes a steam exhaust pipe (16) and several steam conveying pipes (14). The front end of the steam exhaust pipe (16) is connected to the end of the adjacent steam conveying pipe (14) through a U-shaped air guide pipe (15). The front end of the steam conveying pipe (14) is connected to the end of its adjacent steam conveying pipe (14) through a U-shaped air guide pipe (15). The front end of the steam discharge pipe (16) and both ends of the steam delivery pipe (14) are connected to a second sealing disc (12), and both ends of the U-shaped air guide pipe (15) are connected to a first sealing disc (11). The first sealing discs (11) at both ends of the U-shaped air guide pipe (15) are respectively adapted to the corresponding second sealing discs (12).

9. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 8, characterized in that, The first sealing disc (11) has a plurality of first connecting holes evenly distributed around its surface, and the inner wall of the first connecting holes is provided with a limiting groove. The first connecting hole is provided with a first connecting component (17). The first connecting component (17) includes an internal threaded tube (171) and a first guide seat (172) rotatably disposed on its periphery. The first guide seat (172) slides with the corresponding limiting groove. One end of the internal threaded tube (171) is fixed with a force-driven rotating head (173).

10. A shell-and-tube heat exchanger based on a fluid product sterilization process according to claim 9, characterized in that, The second sealing disc (12) has a plurality of limiting cavities (121) evenly distributed in a ring on its surface. The limiting cavity (121) is provided with a second connecting hole (122), and the inner wall of the second connecting hole (122) is provided with a limiting groove. The second connecting hole (122) is provided with a second connecting component (18). The second connecting component (18) includes a threaded connecting post (181) and a second guide seat (182) fixedly disposed on its periphery. The second guide seat (182) is slidably engaged with the corresponding limiting groove. One end of the threaded connecting post (181) is fixed with a positioning plate (183) that is adapted to the limiting cavity (121). The first guide seat (172) is provided with a first magnet (174) on its surface, and the second guide seat (182) is provided with a second magnet (184) that is magnetically attracted to the corresponding first magnet (174) on its surface. The internal threaded tube (171) and the corresponding threaded connecting column (181) are threadedly engaged.

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