Annular tube shell heat exchanger with anti-blocking function

Abstract

The application discloses a ring pipe shell type heat exchanger with a blockage prevention function and relates to the technical field of heat exchangers.The application comprises heat exchange pipes, both ends of the heat exchange pipes are provided with tube sheets, the outer side surface of the heat exchange pipes is fixedly connected with the inner side surface of the tube sheets, the inner side surface of the tube sheets is fixedly connected with the outer side surface of an inner cylinder, the outer side surface of the tube sheets is fixedly connected with the inner side surface of an outer shell, the side of the two tube sheets away from each other is provided in an arc surface shape, the end part of the heat exchange pipes is smoothly arranged on the arc surface side of the tube sheets, the arc surface shaped tube sheets can reduce the impact between the tube sheets and the tube fluid, reduce the attachment of dirt, avoid the blockage caused by the dirt accumulation at the tube sheets, the end part of the heat exchange pipes is smoothly arranged on the arc surface side of the tube sheets, dirt accumulation at the end part of the heat exchange pipes can be reduced in the same way, roughness increase at the pipe opening of the heat exchange pipes caused by dirt accumulation can be avoided, the attachment surface of water scale can be avoided, the time of blockage caused by water scale accumulation can be prolonged, and the maintenance interval can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to an annular tube-shell heat exchanger with anti-blocking function. BACKGROUND

[0002] The annular tube-shell heat exchanger is a special tube-shell heat exchanger, and the shell side is an annular space formed by two concentric cylinders, and the heat exchange tubes are arranged in the annular channel. The cold and hot fluids flow in the tube side and the annular space of the shell side respectively to realize heat exchange, and baffles and other components are often arranged in the shell side to improve the fluid flow state and enhance the heat transfer effect. This heat exchanger has compact structure, can effectively utilize space, makes the fluid flow velocity distribution more uniform, improves the heat transfer efficiency, reduces the dirt deposition, and is suitable for the fields of petroleum chemical industry, refrigeration and the like which have limited space or high requirements on heat transfer performance, and can realize heat transfer between liquid and liquid, gas and liquid.

[0003] When the heat exchanger works, the solubility of the scale-forming substances of the fluid in the tube side will change greatly due to the change of temperature, which is easy to cause scale, affect the heat exchange efficiency of the heat exchange tube, and even cause blockage. When processing some tube side fluids containing impurities, the fluid needs to be filtered to avoid the impurities adhering to the tube side and providing an adhesion site for scale, so the present application provides an annular tube-shell heat exchanger with anti-blocking function. SUMMARY

[0004] To solve the above technical problems, the present application provides an annular tube-shell heat exchanger with anti-blocking function, which comprises:

[0005] The opening end of the shell is fixedly connected with an end cover, the inner side of the shell is fixedly connected with an inner cylinder, the outer side of the inner cylinder is in sliding connection with the inner side of the end cover, and the inner cylinder and the end cover are in sealing contact;

[0006] The pipe mechanism has two parts, and the two parts of the pipe mechanism are fixedly connected with the outer sides of the shell and the end cover respectively, the pipe mechanism has a filtering structure, and the inlet ends of the two parts of the pipe mechanism are provided with filtering structures to avoid blockage of the tube side and the shell side of the heat exchanger;

[0007] The heat exchange mechanism is arranged at the interval between the shell and the inner cylinder, and the surface of the heat exchange mechanism is fixedly connected with the inner side of the shell and the outer side of the inner cylinder, and the heat exchange mechanism has a turbulent flow structure for reducing the dirt deposition in the heat exchange mechanism;

[0008] The heat exchange mechanism comprises:

[0009] The heat exchange tubes are arranged at the interval between the shell and the inner cylinder, both ends of the heat exchange tubes are provided with tube sheets, and the outer side of the heat exchange tube is fixedly connected with the inner side of the tube sheet.

[0010] The tube sheet is configured as an annular shape, and the inner side of the tube sheet is fixedly connected to the outer side of the inner cylinder, and the outer side of the tube sheet is fixedly connected to the inner side of the outer shell.

[0011] The heat exchange tubes are provided in a plurality of manner, and the plurality of heat exchange tubes are evenly distributed along the circumference of the tube sheet.

[0012] Both tube sheets are configured with arc-shaped sides that are far apart from each other, and the ends of the heat exchange tubes are smoothly disposed with the arc-shaped sides of the tube sheets;

[0013] The tube-side fluid and shell-side medium are introduced separately from two parts of the piping system. The tube-side fluid enters the end cap and then flows into several heat exchange tubes, while the shell-side medium enters the gap between the outer shell and the inner cylinder to achieve heat exchange. The two tube sheets are both curved on the opposite sides. The curved tube sheets reduce the impact with the tube-side fluid, thereby reducing fouling and preventing fouling buildup that could cause blockage. The ends of the heat exchange tubes are smoothly set to the curved sides of the tube sheets, which similarly reduces fouling buildup at the ends of the heat exchange tubes. This prevents increased roughness at the tube openings due to fouling buildup, thus avoiding increased scale adhesion surface, prolonging the time before scale buildup causes blockage, and extending maintenance intervals.

[0014] Furthermore, the piping mechanism includes a first tube, which is fixedly connected to the outer side of the end cap. A second tube is fixedly connected to the side of the end cap away from the first tube. A cylinder is fixedly connected to the outer side of the inner cylinder. Baffles are symmetrically arranged inside the end cap. The sides of the two baffles that are far apart from each other are fixedly connected to the inner side of the cylinder. The first tube and the second tube are symmetrically arranged with the baffles as the center. The tube fluid enters the end cap from the first tube, then enters the heat exchange tube above the baffle, enters the tail of the outer shell after passing through the heat exchange tube, then enters the heat exchange tube below the baffle, enters the cavity of the end cap located below the baffle after passing through the heat exchange tube, and finally flows out through the second tube.

[0015] Furthermore, a second shell-side tube is provided at the open end of the outer shell. The second shell-side tube is fixedly connected to the outer side of the outer shell and is located on the side of the outer shell close to the first shell-side tube. The first shell-side tube is located on the side of the outer shell away from the end cap and is fixedly connected to the outer side of the outer shell. The shell-side fluid enters the outer shell from the first shell-side tube, then flows through the gap between the outer shell and the inner cylinder, and finally flows out from the second shell-side tube.

[0016] Furthermore, both the first tube-side tube and the first shell-side tube are fixedly connected to a filter assembly by bolts. The side of the first tube-side tube away from the end cap is fixedly connected to the filter assembly, and the side of the first shell-side tube away from the outer shell is fixedly connected to the filter assembly. The filter assembly can filter the tube-side fluid entering the heat exchange tube and the shell-side fluid entering the space between the outer shell and the inner cylinder, so as to avoid the fluid containing impurities from causing blockage.

[0017] Furthermore, a heat exchange cylinder is fitted around the outside of several heat exchange tubes, and the inner side of the heat exchange cylinder is fixedly connected to the outer side of the heat exchange tubes. The two ends of the heat exchange cylinder are respectively fixedly connected to the sides of the two tube sheets that are close to each other. The outer side of the heat exchange cylinder is set to a hexagonal shape. The heat exchange cylinder can increase the contact area between the heat exchange cylinder and the shell-side fluid, thereby obtaining a better heat exchange effect. Moreover, the hexagonal shape has sharp corners, which can generate turbulence when the shell-side fluid passes through, increasing the difficulty of dirt adhesion and avoiding blockage between the outer shell and the inner cylinder.

[0018] Furthermore, a first baffle plate is fixedly connected to the outer side of the inner cylinder. The side of the first baffle plate away from the inner cylinder is fixedly connected to the outer side of the heat exchange cylinder, and the first baffle plate is disposed at the gap between the inner cylinder and the outer shell. A second baffle plate is fixedly connected to the inner side of the outer shell. The side of the second baffle plate away from the outer shell is fixedly connected to the outer side of the heat exchange cylinder, and the second baffle plate is disposed at the gap between the inner cylinder and the outer shell. Both the first and second baffle plates are spiral-shaped. The two ends of the first and second baffle plates are respectively fixedly connected to the sides of the two tube sheets that are close to each other. The first and second baffles deflect the shell-side fluid, changing its flow direction and creating a tortuous flow pattern. This increases the fluid velocity in the shell side, enhances turbulence, strengthens convective heat transfer between the fluid and the outer surface of the heat exchange tube, and reduces boundary layer thermal resistance, thereby improving the overall heat transfer efficiency of the heat exchanger. The fluid repeatedly sweeps across the tube bundle in the shell side, prolonging its residence time and increasing contact opportunities with the tubes, thus improving heat transfer. Furthermore, the spiral-shaped first and second baffles further alter the flow direction of the shell-side fluid, achieving even better turbulence and reducing fouling.

[0019] Furthermore, a guide plate is provided on the side of the second baffle away from the first baffle. The surface of the guide plate is fixedly connected to the side of the outer shell and the inner cylinder that are close to each other. The guide plate is set in a spiral shape at the interval between the outer shell and the inner cylinder. The two ends of the guide plate are fixedly connected to the side of the two tube sheets that are close to each other. The spiral guide plate can change the overall flow direction of the tube fluid inside the outer shell and the inner cylinder, making it flow in a spiral shape, extending the flow path, and thus obtaining a better heat exchange effect.

[0020] Furthermore, a number of cones are fixedly connected to the inner surfaces of several heat exchange tubes. These cones are evenly distributed inside the heat exchange tubes, with the cones on both sides of the partition arranged in opposite directions. All cones are positioned along the flow direction of the tube-side fluid, flowing from the larger diameter end to the smaller diameter end of the cone. When the tube-side fluid passes through the cone, its velocity increases as it flows from a larger cross-section to a smaller cross-section. According to Bernoulli's principle, this causes a decrease in pressure, creating a localized low-pressure zone. This induces disturbance and mixing of the surrounding fluid, promoting turbulence and preventing scale buildup on the inner wall of the heat exchange tubes. The multiple cones continuously generate turbulence, and the interaction of these multiple turbulent layers further disturbs the tube-side fluid, further preventing scale formation.

[0021] Furthermore, the filter assembly includes two filter tubes, each bolted to a distant end of a first tube side and a first shell side. A filter plate is fixedly connected to the inner side of each filter tube. The surface of the filter plate has filter holes, which are elliptical in shape and evenly distributed on the surface of the filter plate. The filter plate can filter insoluble impurities inside the fluid, preventing impurities from entering the tube side and shell side and causing blockage. The narrow elliptical shape of the filter holes can achieve better filtration effect.

[0022] Furthermore, a ring is provided on the side of the filter plate near the end cap, and the outer side of the ring is fixedly connected to the inner side of the filter tube. Several rings are provided, and long baffles are fixedly connected to the inner side of each ring. Several long baffles are evenly distributed along the circumference of the ring, and short baffles are provided at intervals between adjacent long baffles. Both the long and short baffles are inclined away from the filter plate and are corrugated. The middle of the long and short baffles bulges towards the side closer to the filter plate. When fluid passes through the filter tube, it collides with the long baffles, and some small particles that are not filtered out adhere to the surface of the long baffles, thereby improving the impurity removal effect. The short baffles fill the larger gaps between the long baffles, resulting in a larger blocking area and further removing small particulate impurities. Both the long and short baffles are corrugated, further increasing the adhesion area for impurities and reducing the impurity content in the fluid entering the tube and shell sides, preventing blockage. The raised long and short baffles in the middle ensure smooth fluid flow, preventing fluid residue on their surfaces. The rough surface with attached small particulate impurities provides conditions for scaling, further reducing the amount of scaling material in the flow into the tube and shell sides and lowering the probability of blockage. The bolted filter tubes are located outside the heat exchanger shell for easy disassembly and cleaning.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. This invention, by setting tube sheets with both tube sheets having an arc-shaped side away from each other, reduces the impact between the tube sheet and the fluid in the tube, thereby reducing the adhesion of fouling and preventing fouling buildup at the tube sheet that could cause blockage. The ends of the heat exchange tubes are smoothly set with the arc-shaped side of the tube sheet, which can similarly reduce the accumulation of fouling at the ends of the heat exchange tubes. This prevents the accumulation of fouling from increasing the roughness at the tube openings, thus avoiding an increase in the surface area for scale adhesion, extending the time before scale buildup causes blockage, and extending the maintenance interval.

[0025] 2. By setting up a heat exchange mechanism, the hexagonal heat exchange cylinder can increase the contact area between the heat exchanger and the shell-side fluid, thereby achieving a better heat exchange effect. In addition, the hexagonal shape has sharp edges, which can generate turbulence when the shell-side fluid passes through, increasing the difficulty of dirt adhesion and avoiding blockage between the outer shell and the inner cylinder.

[0026] 3. This invention utilizes baffles, specifically the first and second baffles, to deflect the shell-side fluid, altering its flow direction and creating a tortuous flow. This increases the fluid velocity in the shell side, enhances turbulence, strengthens convective heat transfer between the fluid and the outer surface of the heat exchanger, and reduces boundary layer thermal resistance, thereby improving the overall heat transfer efficiency of the heat exchanger. The fluid repeatedly sweeps across the tube bundle in the shell side, extending its residence time and increasing contact opportunities with the tubes, thus improving heat transfer. Furthermore, the spiral-shaped first and second baffles further alter the flow direction of the shell-side fluid, achieving better turbulence and reducing fouling. The spiral-shaped guide plates also change the overall flow direction of the tube-side fluid within the outer shell and inner cylinder, creating a spiral flow and extending the flow path for even better heat exchange.

[0027] 4. This invention incorporates several conical tubes arranged along the flow direction of the tube-side fluid. The tube-side fluid flows from the large-diameter end of the conical tube to the small-diameter end. As the fluid flows from a larger cross-section to a smaller cross-section through the conical tube, the flow velocity increases. According to Bernoulli's principle, the pressure decreases, thus creating a local low-pressure zone. This causes disturbance and mixing of the surrounding fluid, promoting the formation of turbulence. This prevents scale from adhering to the inner wall of the heat exchange tube. Furthermore, the arrangement of multiple conical tubes continuously generates turbulence, and the interaction of multiple turbulent layers further disturbs the tube-side fluid, further preventing scale formation.

[0028] 5. This invention, through the setting of a filter assembly, allows the filter plate to filter insoluble impurities inside the fluid, preventing impurities from entering the tube side and shell side and causing blockage. The filter holes are designed as narrow ellipses, achieving better filtration. As the fluid passes through the filter tube, it collides with the long baffles, causing some small particles that are not filtered out to adhere to the surface of the long baffles, thus improving impurity removal. The short baffles fill the larger gaps between the long baffles, obtaining a larger blocking area to further remove small particles. Both the long and short baffles are corrugated, further increasing the adhesion area of ​​impurities, thereby reducing the impurity content in the fluid entering the tube side and shell side, preventing blockage. The raised long and short baffles in the middle ensure smooth fluid flow, preventing fluid residue on their surfaces. The rough surface with small particles provides conditions for scaling, further reducing the amount of scaling in the flow into the tube side and shell side, lowering the probability of blockage. The bolted filter tubes are located outside the heat exchanger shell, facilitating disassembly and cleaning. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the annular shell-and-tube heat exchanger with anti-clogging function of the present invention;

[0030] Figure 2 This is a schematic diagram of the pipeline mechanism structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the tube sheet structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the heat exchanger structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the guide plate structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the conical cylinder structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the filter component structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the cross-sectional structure of the filter tube of the present invention;

[0037] Figure 9 This is a schematic diagram of the long baffle structure of the present invention;

[0038] Figure 10 This is a schematic diagram of the short baffle structure of the present invention.

[0039] In the diagram: 1. Outer shell; 2. Inner cylinder; 3. Piping system; 31. First tube side; 32. Second tube side; 33. Second shell side; 34. First shell side; 35. Filter assembly; 351. Filter tube; 352. Filter plate; 353. Filter holes; 354. Ring; 355. Long baffle; 356. Short baffle; 36. Cylinder; 37. Baffle; 4. Heat exchange mechanism; 41. Heat exchange tube; 42. Tube sheet; 43. Heat exchange cylinder; 44. First baffle; 45. Second baffle; 46. Guide plate; 47. Cone; 5. End cap. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0041] Example 1, please refer to Figures 1-6 The present invention is an annular shell-and-tube heat exchanger with anti-clogging function, comprising:

[0042] The outer shell 1 has an end cap 5 fixedly connected to its open end, and an inner cylinder 2 fixedly connected to its inner side. The outer side of the inner cylinder 2 is slidably connected to the inner side of the end cap 5, and the inner cylinder 2 is in sealed contact with the end cap 5.

[0043] Piping mechanism 3 has two parts, and the two parts of piping mechanism 3 are respectively fixedly connected to the outer side of the outer shell 1 and the end cover 5. Piping mechanism 3 has a filter structure, and the inlet end of both parts of piping mechanism 3 is provided with a filter structure to avoid blockage of the heat exchanger tube side and shell side.

[0044] The heat exchange mechanism 4 is located at the gap between the outer shell 1 and the inner cylinder 2, and the surface of the heat exchange mechanism 4 is fixedly connected to the inner side of the outer shell 1 and the outer side of the inner cylinder 2. The heat exchange mechanism 4 has a turbulent structure to reduce the fouling deposits inside the heat exchange mechanism 4.

[0045] Among them, heat exchange mechanism 4 includes:

[0046] Heat exchange tube 41 is disposed at the interval between the outer shell 1 and the inner cylinder 2. Tube sheet 42 is provided at both ends of the heat exchange tube 41. The outer side of the heat exchange tube 41 is fixedly connected to the inner side of the tube sheet 42.

[0047] The tube sheet 42 is configured as an annular shape, and the inner side of the tube sheet 42 is fixedly connected to the outer side of the inner cylinder 2, and the outer side of the tube sheet 42 is fixedly connected to the inner side of the outer shell 1.

[0048] There are several heat exchange tubes 41, and the several heat exchange tubes 41 are evenly distributed along the circumference of the tube sheet 42.

[0049] The two tube sheets 42 are both set to arc-shaped on the side that is far apart from each other, and the ends of the heat exchange tubes 41 are smoothly set with the arc-shaped side of the tube sheet 42.

[0050] The tube-side fluid and shell-side medium are introduced from two separate parts of the piping system 3. The tube-side fluid enters the end cap 5 and then enters several heat exchange tubes 41. At the same time, the shell-side medium enters the gap between the outer shell 1 and the inner cylinder 2 to achieve heat exchange. The two tube sheets 42 are both set with arc-shaped sides that are far apart from each other. The arc-shaped tube sheets 42 can reduce the impact between the tube-side fluid and the tube-side fluid, thereby reducing the adhesion of fouling and preventing fouling from accumulating and causing blockage at the tube sheet 42. The ends of the heat exchange tubes 41 are smoothly set with the arc-shaped sides of the tube sheets 42, which can similarly reduce the accumulation of fouling at the ends of the heat exchange tubes 41. This prevents the accumulation of fouling from increasing the roughness at the tube openings of the heat exchange tubes 41, thereby preventing the increase of the scale adhesion surface, prolonging the time before scale accumulation causes blockage, and extending the maintenance interval.

[0051] The piping mechanism 3 includes a first tube 31, which is fixedly connected to the outer side of the end cap 5. A second tube 32 is fixedly connected to the side of the end cap 5 away from the first tube 31. A cylinder 36 is fixedly connected to the outer side of the inner cylinder 2. Baffles 37 are symmetrically arranged inside the end cap 5. The side of the two baffles 37 that is far from each other is fixedly connected to the inner side of the cylinder 36. The first tube 31 and the second tube 32 are symmetrically arranged with the baffles 37 as the center. The tube fluid enters the end cap 5 from the first tube 31, then enters the heat exchange tube 41 above the baffles 37, enters the tail of the outer shell 1 after passing through the heat exchange tube 41, then enters the heat exchange tube 41 below the baffles 37, enters the cavity of the end cap 5 below the baffles 37 after passing through the heat exchange tube 41, and finally flows out through the second tube 32.

[0052] The open end of the outer shell 1 is provided with a second shell-side tube 33, which is fixedly connected to the outer side of the outer shell 1. The second shell-side tube 33 is located on the side of the outer shell 1 close to the first shell-side tube 31. The side of the outer shell 1 close to the second shell-side tube 32 is provided with a first shell-side tube 34, which is located on the side of the outer shell 1 away from the end cap 5. The first shell-side tube 34 is fixedly connected to the outer side of the outer shell 1. The shell-side fluid enters the outer shell 1 from the first shell-side tube 34, then passes through the gap between the outer shell 1 and the inner cylinder 2, and finally flows out from the second shell-side tube 33.

[0053] Both the first tube 31 and the first shell tube 34 are fixedly connected to a filter assembly 35 by bolts. The side of the first tube 31 away from the end cap 5 is fixedly connected to the filter assembly 35, and the side of the first shell tube 34 away from the outer shell 1 is fixedly connected to the filter assembly 35. The filter assembly 35 can filter the tube fluid entering the heat exchange tube 41 and the shell fluid entering the space between the outer shell 1 and the inner cylinder 2, so as to avoid the fluid containing impurities from causing blockage.

[0054] A heat exchange cylinder 43 is fitted around the outside of several heat exchange tubes 41, and the inner side of the heat exchange cylinder 43 is fixedly connected to the outer side of the heat exchange tubes 41. The two ends of the heat exchange cylinder 43 are respectively fixedly connected to the sides of the two tube sheets 42 that are close to each other. The outer side of the heat exchange cylinder 43 is set in a hexagonal shape. The heat exchange cylinder 43 can increase the contact area between the heat exchange cylinder and the shell-side fluid, thereby obtaining a better heat exchange effect. The hexagonal shape has sharp corners, which can generate turbulence when the shell-side fluid passes through, increasing the difficulty of dirt adhesion and preventing blockage between the outer shell 1 and the inner cylinder 2.

[0055] A first baffle plate 44 is fixedly connected to the outer side of the inner cylinder 2. The side of the first baffle plate 44 away from the inner cylinder 2 is fixedly connected to the outer side of the heat exchange cylinder 43, and the first baffle plate 44 is located at the gap between the inner cylinder 2 and the outer shell 1. A second baffle plate 45 is fixedly connected to the inner side of the outer shell 1. The side of the second baffle plate 45 away from the outer shell 1 is fixedly connected to the outer side of the heat exchange cylinder 43, and the second baffle plate 45 is located at the gap between the inner cylinder 2 and the outer shell 1. Both the first baffle plate 44 and the second baffle plate 45 are spiral-shaped. The two ends of the first baffle plate 44 and the second baffle plate 45 are respectively fixedly connected to the sides of the two tube sheets 42 that are close to each other. The flow plate 44 and the second baffle 45 deflect the shell-side fluid, changing its flow direction and making it flow in a tortuous manner. This increases the fluid velocity in the shell side, enhances the turbulence, strengthens convective heat transfer between the fluid and the outer surface of the heat exchange tube 43, and reduces boundary layer thermal resistance, thereby improving the overall heat transfer efficiency of the heat exchanger. The fluid repeatedly sweeps across the tube bundle in the shell side, prolonging its residence time and increasing contact opportunities with the fluid, thus improving heat transfer. Furthermore, the spiral-shaped first baffle 44 and second baffle 45 can further change the flow direction of the shell-side fluid, achieving better turbulence and reducing fouling.

[0056] A guide plate 46 is provided on the side of the second baffle 45 away from the first baffle 44. The surface of the guide plate 46 is fixedly connected to the side of the outer shell 1 and the inner cylinder 2 that are close to each other. The guide plate 46 is set in a spiral shape at the interval between the outer shell 1 and the inner cylinder 2. The two ends of the guide plate 46 are fixedly connected to the side of the two tube sheets 42 that are close to each other. The spiral guide plate 46 can change the overall flow direction of the fluid in the tubes inside the outer shell 1 and the inner cylinder 2, so that it flows in a spiral shape, extending the flow path and thus obtaining a better heat exchange effect.

[0057] Several cones 47 are fixedly connected to the inner sides of several heat exchange tubes 41. Several cones 47 are evenly distributed inside the heat exchange tubes 41, and the cones 47 in the heat exchange tubes 41 located on both sides of the partition 37 are arranged in opposite directions. The cones 47 are arranged along the flow direction of the tube-side fluid. The tube-side fluid flows from the large-diameter end of the cone 47 to the small-diameter end. When the tube-side fluid passes through the cone 47, the flow velocity increases as the fluid flows from a larger cross-section to a smaller cross-section. According to Bernoulli's principle, the pressure will decrease, thus forming a low-pressure area in a local area. This causes disturbance and mixing of the surrounding fluid, promotes the formation of turbulence, and thus prevents scale from adhering to the inner wall of the heat exchange tubes 41. Furthermore, the arrangement of multiple cones 47 can continuously generate turbulence. The interaction of multiple turbulent layers can further disturb the tube-side fluid and further prevent scale formation.

[0058] Example 2, please refer to Figures 1-10 The filter assembly 35 includes two filter tubes 351. The two filter tubes 351 are bolted to the ends of the first tube side tube 31 and the first shell side tube 34, respectively, which are far apart from each other. A filter plate 352 is fixedly connected to the inner side of the filter tubes 351. The surface of the filter plate 352 is provided with filter holes 353, which are elliptical in shape. There are several filter holes 353, which are evenly distributed on the surface of the filter plate 352. The filter plate 352 can filter insoluble impurities inside the fluid, preventing impurities from entering the tube side and shell side and causing blockage. The filter holes 353 are elliptical in shape, which can achieve better filtration effect.

[0059] A ring 354 is provided on the side of the filter plate 352 near the end cover 5, and the outer side of the ring 354 is fixedly connected to the inner side of the filter tube 351. Several rings 354 are provided, and long baffles 355 are fixedly connected to the inner side of each ring 354. Several long baffles 355 are evenly distributed along the circumference of the rings 354, and short baffles 356 are provided at intervals between adjacent long baffles 355. Both the long baffles 355 and the short baffles 356 are inclined away from the filter plate 352, and both are corrugated. The middle of the long baffles 355 and the short baffles 356 bulges towards the side closer to the filter plate 352. When fluid passes through the filter tube 351, it collides with the long baffles 355, and some small particles that are not filtered out adhere to the surface of the long baffles 355. The design improves impurity removal efficiency, and the short baffle 356 fills the larger gap between the long baffles 355, resulting in a larger blocking area and further removing small particulate impurities. Both the long baffles 355 and the short baffles 356 are wavy, further increasing the adhesion area of ​​impurities and reducing the impurity content in the fluid entering the tube and shell sides, preventing blockage. The raised long baffles 355 and 356 in the middle ensure smooth fluid flow, preventing fluid residue on their surfaces. The rough surface with attached small particulate impurities provides conditions for scaling, further reducing the amount of scaling material in the flow into the tube and shell sides and lowering the probability of blockage. The bolted filter tube 351 is located outside the heat exchanger shell 1, facilitating disassembly and cleaning.

[0060] In operation, the tube-side fluid enters the end cap 5 from the first tube 31, and then enters the heat exchange tube 41 above the partition 37. The tube-side fluid flows from the large-diameter end to the small-diameter end of the cone 47. As the fluid flows through the cone 47, its velocity increases as it moves from a larger cross-section to a smaller cross-section, creating a local low-pressure zone that causes disturbance and mixing of the surrounding fluid, resulting in turbulence. After passing through the heat exchange tube 41, the tube-side fluid enters the tail of the outer shell 1, and then enters the heat exchange tube 41 below the partition 37. After passing through the heat exchange tube 41, the fluid enters the cavity of the end cap 5 located below the partition plate 37, and finally flows out through the second tube 32. At the same time, the shell-side fluid enters the outer shell 1 from the first shell-side tube 34, and then passes through the gap between the outer shell 1 and the inner cylinder 2. The tube-side fluid and the shell-side fluid exchange heat at the gap between the outer shell 1 and the inner cylinder 2. The first baffle plate 44 and the second baffle plate 45 deflect the shell-side fluid, change the flow direction of the shell-side fluid, and make the fluid flow in a tortuous manner, and finally flow out from the second shell-side tube 33.

[0061] Before participating in heat exchange, the tube-side and shell-side fluids first pass through filter tubes 351 and filter plates 352 to filter out insoluble impurities inside the fluids. Subsequently, the fluids collide with long baffles 355 and short baffles 356. Some of the small particulate impurities that are not filtered out will adhere to the surface of the long baffle 355. The surface roughened by the small particulate impurities provides conditions for the adhesion of scaling substances, thereby reducing the content of scaling substances in the flow into the tube-side and shell-side.

[0062] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. An annular shell-and-tube heat exchanger with anti-clogging function, characterized in that, include: The outer shell (1) has an end cap (5) fixedly connected to its open end, and an inner cylinder (2) fixedly connected to its inner side. The outer side of the inner cylinder (2) is slidably connected to the inner side of the end cap (5), and the inner cylinder (2) is in sealed contact with the end cap (5). Piping mechanism (3), the piping mechanism (3) has two parts, and the two parts of the piping mechanism (3) are respectively fixedly connected to the outer side of the outer shell (1) and the end cap (5); The pipeline mechanism (3) includes a first tube (31), and a second tube (32) is fixedly connected to the end cap (5) on the side away from the first tube (31). A partition (37) is symmetrically arranged inside the end cap (5). A first shell tube (34) is arranged on the side of the outer shell (1) close to the second tube (32). Both the first tube (31) and the first shell tube (34) are fixedly connected to a filter assembly (35) by bolts. A heat exchange mechanism (4) is provided at the interval between the outer shell (1) and the inner cylinder (2), and the surface of the heat exchange mechanism (4) is fixedly connected to the inner side of the outer shell (1) and the outer side of the inner cylinder (2). The heat exchange mechanism (4) has a turbulent structure. The heat exchange mechanism (4) includes: Heat exchange tube (41) is provided at the interval between the outer shell (1) and the inner cylinder (2). Both ends of the heat exchange tube (41) are provided with tube sheets (42). The outer side of the heat exchange tube (41) is fixedly connected to the inner side of the tube sheet (42). The tube sheet (42) is configured as an annular shape, and the inner side of the tube sheet (42) is fixedly connected to the outer side of the inner cylinder (2), and the outer side of the tube sheet (42) is fixedly connected to the inner side of the outer shell (1). The heat exchange tubes (41) are provided in a plurality of them, and the plurality of heat exchange tubes (41) are evenly distributed along the circumference of the tube sheet (42); The two tube sheets (42) are both set in an arc shape on the side that is far apart from each other, and the end of the heat exchange tube (41) is smoothly set with the arc side of the tube sheet (42); A heat exchange cylinder (43) is fitted around the outside of several heat exchange tubes (41), and the inner side of the heat exchange cylinder (43) is fixedly connected to the outer side of the heat exchange tube (41). The two ends of the heat exchange cylinder (43) are respectively fixedly connected to the side of the two tube sheets (42) that are close to each other, and the outer side of the heat exchange cylinder (43) is set to a hexagonal shape. A cone (47) is fixedly connected to the inner side of several heat exchange tubes (41). Several cones (47) are provided and are evenly distributed inside the heat exchange tubes (41). The cones (47) inside the heat exchange tubes (41) located on both sides of the partition (37) are arranged in opposite directions. The filter assembly (35) includes filter tubes (351), and two filter tubes (351) are provided. The two filter tubes (351) are respectively bolted to the ends of the first tube (31) and the first shell tube (34) that are far apart from each other. A filter plate (352) is fixedly connected to the inner side of the filter tube (351). The surface of the filter plate (352) is provided with filter holes (353), and the filter holes (353) are set to be elliptical. There are a number of filter holes (353), and the number of filter holes (353) are evenly distributed on the surface of the filter plate (352). The filter plate (352) is provided with an annulus (354) on the side near the end cap (5), and the outer side of the annulus (354) is fixedly connected to the inner side of the filter tube (351). There are several annulus (354), and a long baffle (355) is fixedly connected to the inner side of the annulus (354). Several long baffles (355) are evenly distributed along the circumference of the annulus (354), and a short baffle (356) is provided at the interval between adjacent long baffles (355). Both the long baffles (355) and the short baffles (356) are inclined to the side away from the filter plate (352), and both the long baffles (355) and the short baffles (356) are wavy. The middle part of the long baffles (355) and the short baffles (356) bulges towards the side near the filter plate (352).

2. The annular shell-and-tube heat exchanger with anti-clogging function according to claim 1, characterized in that: The first tube (31) is fixedly connected to the outer side of the end cap (5), and the outer side of the inner cylinder (2) is fixedly connected to the cylinder body (36). The two partitions (37) are fixedly connected to the inner side of the cylinder body (36) on the side that is far away from each other. The first tube (31) and the second tube (32) are symmetrically arranged with the partition (37) as the center.

3. A ring-shaped shell-and-tube heat exchanger with anti-clogging function according to claim 2, characterized in that: The opening end of the outer shell (1) is provided with a second shell-side tube (33), the second shell-side tube (33) is fixedly connected to the outer side of the outer shell (1), and the second shell-side tube (33) is located on the side of the outer shell (1) close to the first shell-side tube (31). The first shell-side tube (34) is located on the side of the outer shell (1) away from the end cap (5), and the first shell-side tube (34) is fixedly connected to the outer side of the outer shell (1).

4. A ring-shaped shell-and-tube heat exchanger with anti-clogging function according to claim 3, characterized in that: The side of the first tube (31) away from the end cap (5) is fixedly connected to the filter assembly (35), and the side of the first shell tube (34) away from the outer shell (1) is fixedly connected to the filter assembly (35).

5. A ring-shaped shell-and-tube heat exchanger with anti-clogging function according to claim 1, characterized in that: A first baffle plate (44) is fixedly connected to the outer side of the inner cylinder (2). The side of the first baffle plate (44) away from the inner cylinder (2) is fixedly connected to the outer side of the heat exchange cylinder (43). The first baffle plate (44) is located at the interval between the inner cylinder (2) and the outer shell (1). A second baffle plate (45) is fixedly connected to the inner side of the outer shell (1). The side of the second baffle plate (45) away from the outer shell (1) is fixedly connected to the outer side of the heat exchange cylinder (43). The second baffle plate (45) is located at the interval between the inner cylinder (2) and the outer shell (1). The first baffle plate (44) and the second baffle plate (45) are both spiral-shaped. The two ends of the first baffle plate (44) and the second baffle plate (45) are respectively fixedly connected to the side of the two tube sheets (42) that are close to each other.

6. A ring-shaped shell-and-tube heat exchanger with anti-clogging function according to claim 5, characterized in that: A guide plate (46) is provided on the side of the second baffle (45) away from the first baffle (44). The surface of the guide plate (46) is fixedly connected to the side of the outer shell (1) and the inner cylinder (2) that are close to each other. The guide plate (46) is set in a spiral shape at the interval between the outer shell (1) and the inner cylinder (2). The two ends of the guide plate (46) are fixedly connected to the side of the two tube sheets (42) that are close to each other.

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