Wound tube heat exchanger

Abstract

The utility model discloses a coiled tube heat exchanger which comprises a shell, a liquid inlet tube plate is arranged in the shell, the interior of the shell is divided into a liquid inlet cavity and a heat exchange cavity by the liquid inlet tube plate, a liquid inlet is formed in the cavity wall of the liquid inlet cavity, a heat exchange tube bundle is arranged in the heat exchange cavity, and the liquid inlet tube plate is provided with a communicating opening for communicating the liquid inlet cavity with the heat exchange tube bundle. A separator is arranged in the liquid inlet cavity to divide the liquid inlet cavity into a transition cavity and a liquid dispersing cavity, the liquid inlet is communicated with the transition cavity, the liquid dispersing cavity is communicated with the heat exchange tube bundle, the separator is provided with a guide part, and the guide part is communicated with the transition cavity and the liquid dispersing cavity. After the heat exchange medium is blocked by the separator, the flowing speed is slowed down, the flowing direction is changed, and the distribution range of the heat exchange medium in the transition cavity is widened. The guide part can guide the flowing direction of the heat exchange medium, so that the heat exchange medium disperses and flows to the liquid dispersing cavity, the distribution uniformity of the heat exchange medium in the heat exchange tube bundle is improved, the two media are subjected to uniform heat exchange through the side wall of the heat exchange tube bundle, and the heat exchange efficiency and the heat exchange uniformity are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a coiled tube heat exchanger. Background Art

[0002] The coil heat exchanger is a device used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements. It is an industrial application of convective heat transfer and heat conduction and plays an important role in general production in chemical, petroleum, power, food and many other industrial sectors.

[0003] A coiled-wound heat exchanger generally includes a shell and a heat exchange tube bundle located inside the shell. One medium (heat exchange medium) flows in the heat exchange tube bundle, and another medium (shell-side medium) flows in the shell space outside the heat exchange tube bundle. The two media exchange heat through the wall of the heat exchange tube bundle. It has a simple structure, can withstand high pressure, has a large heat transfer coefficient, and high heat exchange efficiency.

[0004] To secure the ends of the heat exchange tube bundle, a liquid inlet tube sheet is typically installed at the liquid inlet end of the heat exchange tube bundle. The heat exchange tube bundle consists of multiple heat exchange tubes fixed to the liquid inlet tube sheet, forming a liquid inlet cavity between the liquid inlet and the inlet tube sheet. The heat exchange medium flows into the liquid inlet cavity through the liquid inlet and then into the heat exchange tube bundle through the liquid inlet tube sheet. The liquid inlet is typically coaxial with the shell and smaller than the cross-sectional dimensions of the liquid inlet cavity. After entering the liquid inlet cavity through the liquid inlet, the heat exchange medium is concentrated in the central region of the liquid inlet cavity. This results in more heat exchange medium in the heat exchange tubes connected to the central region of the liquid inlet tube sheet and less heat exchange medium in the heat exchange tubes connected to the peripheral region of the liquid inlet tube sheet, resulting in uneven heat exchange distribution within the heat exchange tube bundle. When the shell-side medium within the shell space comes into contact with the heat exchange tubes with less heat exchange medium, sufficient heat exchange is not achieved, resulting in uneven heat exchange and low heat exchange efficiency in the coiled heat exchanger. Utility Model Content

[0005] The utility model provides a coiled tube heat exchanger to solve the problems of uneven heat exchange and low heat exchange efficiency of the coiled tube heat exchanger caused by uneven distribution of heat exchange medium in a heat exchange tube bundle.

[0006] The technical solution adopted by this utility model is:

[0007] A coiled heat exchanger includes a shell, wherein a liquid inlet tube sheet is provided in the shell, the liquid inlet tube sheet divides the interior of the shell into a liquid inlet chamber and a heat exchange chamber, a liquid inlet port is provided in the cavity wall of the liquid inlet chamber, a heat exchange tube bundle is provided in the heat exchange chamber, the liquid inlet tube sheet is provided with a connecting port connecting the liquid inlet chamber and the heat exchange tube bundle, a partition is provided in the liquid inlet chamber to divide the liquid inlet chamber into a transition chamber and a bulk liquid chamber, the liquid inlet port is connected to the transition chamber, and the bulk liquid chamber is connected to the heat exchange tube bundle, the partition is provided with a guide portion, the guide portion connecting the transition chamber and the bulk liquid chamber, and the guide portion can guide the flow direction of the heat exchange medium in the transition chamber so that the heat exchange medium is dispersed and flows into the bulk liquid chamber.

[0008] The coiled tube heat exchanger of the present invention also has the following additional technical features:

[0009] The guide portion includes at least one spraying member, which has a main body and a spraying port communicating with the liquid dispersion chamber, and the spraying port surrounds the main body.

[0010] The spraying element has a liquid inlet channel connected to the transition chamber, and the cross-sectional size of the liquid inlet channel gradually decreases toward the liquid dispersing chamber.

[0011] The spray element has a connecting channel connecting the liquid inlet channel and the spray port, and a diffuser cone is provided in the connecting channel. The diffuser cone has a first end facing the liquid inlet channel and a second end facing the spray port. The cross-sectional size of the diffuser cone gradually increases from the first end to the second end, and the spray port is surrounded on the outside of the second end.

[0012] The guide portion includes a spraying member, and the spraying member is coaxially arranged with the housing, or,

[0013] The guide portion includes a plurality of spraying elements, and the plurality of spraying elements are arranged around the axis of the shell.

[0014] The central area of ​​the partition protrudes toward the liquid inlet to form the guide portion, so as to form a flow-guiding transition surface with a height gradually decreasing from the center to the periphery on the side of the guide portion facing the liquid inlet, and the guide portion is provided with a through channel connecting the transition chamber and the bulk liquid chamber.

[0015] The guide portion includes a plurality of through channels opened in the partition and connected to the transition chamber and the bulk liquid chamber;

[0016] The through channel extends outwardly from the transition chamber toward the bulk liquid chamber, and in the radial direction away from the center of the partition, the angle between the extension direction of the through channel and the axis of the shell gradually increases.

[0017] And / or, the opening ratio of the partition increases gradually in the radial direction away from the center of the partition.

[0018] The partition also has side walls and a bottom wall extending toward the liquid inlet, and the side walls and the bottom wall enclose the transition cavity. The cross-sectional size of the transition cavity gradually decreases toward the liquid inlet, and the side wall is provided with a spirally extending guide protrusion protruding toward the transition cavity, and a flow channel is formed between the guide protrusions.

[0019] The shell is provided with a shell-side liquid inlet and a shell-side liquid outlet communicating with the heat exchange cavity. The shell-side liquid inlet and the shell-side liquid outlet are located on both sides of the shell in a radial direction.

[0020] A plurality of baffles are arranged inside the heat exchange chamber between the shell-side liquid inlet and the shell-side liquid outlet, and a flow gap is provided between the baffle and the inner wall of the shell. From the shell-side liquid inlet to the shell-side liquid outlet, adjacent flow gaps are staggered, and flow holes are provided on the baffle.

[0021] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0022] 1. In the present invention, the shell-side medium in the heat exchange chamber exchanges heat with the heat exchange medium in the heat exchange tube bundle through the sidewalls of the heat exchange tube bundle, so that the shell-side medium in the heat exchange chamber reaches an appropriate temperature. The heat exchange medium enters the transition chamber from the liquid inlet and, after being blocked by the partition, slows down its flow rate and changes the flow direction of a portion of the heat exchange medium, preventing the heat exchange medium from flowing in a concentrated manner. This increases the distribution range of the heat exchange medium within the transition chamber, thereby fully utilizing the guiding function of the guide portion. The guide portion guides the flow direction of the heat exchange medium, pushing it to disperse in all directions, thereby distributing it to the bulk liquid chamber and improving its uniformity of distribution within the bulk liquid chamber. The dispersed heat exchange medium in the bulk liquid chamber flows through the liquid inlet tube sheet into the heat exchange tube bundle, preventing the heat exchange medium from concentrating on the heat exchange tubes connected to the central region of the liquid inlet tube sheet. The present invention arranges the separator and the guide portion upstream of the liquid inlet tube sheet so that the heat exchange medium is first guided by the guide portion before reaching the liquid inlet tube sheet, thereby dispersing the flow. A portion of the heat exchange medium flows from the central area of ​​the shell to the center of the liquid inlet tube sheet, and a portion of the heat exchange medium flows from the outer periphery of the shell to the outer periphery of the liquid inlet tube sheet. After the heat exchange medium flows to the liquid inlet tube sheet, a portion of the heat exchange medium enters the heat exchange tube bundle through the connecting port, and a portion of the heat exchange medium further disperses and flows on the liquid inlet tube sheet. The guide portion and the liquid inlet tube sheet cooperate to allow the heat exchange medium to undergo two dispersed flows before entering the heat exchange tube bundle, thereby making the heat exchange medium more evenly distributed in the heat exchange tube bundle. This improves the uniformity of the heat exchange medium entering the heat exchange tube bundle through the liquid inlet tube sheet, thereby allowing the shell-side medium and the heat exchange medium to exchange heat evenly through the tube wall of the heat exchange tube bundle, thereby improving the efficiency and uniformity of heat exchange.

[0023] 2. As a preferred embodiment of the present invention, the spray element comprises a connecting channel connecting the liquid inlet channel and the spray outlet. A diffuser cone is disposed within the connecting channel. The diffuser cone has a first end facing the liquid inlet channel and a second end facing the spray outlet. The cross-sectional dimensions of the diffuser cone gradually increase from the first end to the second end, and the spray outlet surrounds the outer side of the second end. The outer surface of the diffuser cone forms a diffuser surface facing the liquid inlet channel. Heat exchange medium flowing into the connecting channel through the liquid inlet channel is guided by the diffuser surface and evenly dispersed around the diffuser cone, thereby improving the circumferential uniformity of the heat exchange medium reaching the spray outlet. Furthermore, within the connecting channel, after being guided by the diffuser cone, the heat exchange medium has horizontal kinetic energy that disperses horizontally in all directions. After flowing out of the spray outlet, the heat exchange medium can disperse in all directions, thereby improving the distribution range of the heat exchange medium flowing out of the spray outlet within the liquid dispersion chamber.

[0024] 3. As a preferred embodiment of the present invention, the guide portion includes multiple through-channels formed in the partition and connecting the transition chamber and the bulk liquid chamber. The through-channels extend outwardly from the transition chamber toward the bulk liquid chamber at an angle, with the angle between the through-channel extension direction and the axis of the housing gradually increasing in the radial direction away from the center of the partition. Heat exchange medium flows from the transition chamber into the bulk liquid chamber through the through-channels. The inclined through-channels guide the flow of the heat exchange medium, dispersing it in all directions and improving its uniformity within the bulk liquid chamber. In the transition chamber, the heat exchange medium flows more concentratedly in the central region. After being guided by the through-channels, it is distributed over a wider area within the central region of the bulk liquid chamber. The through-channels in the peripheral regions have a relatively larger angle between their extension direction and the axis, which encourages more heat exchange medium to disperse to the peripheral regions of the bulk liquid chamber, thereby improving its uniformity within the bulk liquid chamber and ensuring a uniform flow to the heat exchange tube bundle.

[0025] 4. As a preferred embodiment of the present invention, the partition further comprises a side wall and a bottom wall extending toward the liquid inlet, wherein the side wall and the bottom wall enclose the transition chamber, wherein the cross-sectional dimensions of the transition chamber gradually decrease toward the liquid inlet, and the side wall is provided with a spirally extending flow-guiding protrusion protruding toward the transition chamber, with a flow channel formed between the flow-guiding protrusions. The cross-sectional dimensions of the transition chamber gradually decrease toward the liquid inlet, and as the heat exchange medium flows within the transition chamber, the radial constraint effect of the side wall on the heat exchange medium decreases, and the heat exchange medium can generate a certain degree of dispersed flow within the transition chamber. Furthermore, after the heat exchange medium passes through the transition chamber, the flow velocity of the heat exchange medium is reduced to a certain extent, so that the guiding and dispersing effect of the guide portion on the heat exchange medium can be better exerted. The flow-guiding protrusions arranged on the side walls have a blocking effect on the heat exchange medium flowing in the transition chamber, and can promote the heat exchange medium to generate a spiral circulation in the flow channel, thereby increasing the horizontal flow of the heat exchange medium in the transition chamber, thereby increasing the uniformity of the distribution of the heat exchange medium in the transition chamber.

[0026] 5. As a preferred embodiment of the present invention, a plurality of baffles are provided within the heat exchange chamber between the shell-side liquid inlet and the shell-side liquid outlet. A flow gap is defined between the baffles and the inner wall of the shell. Adjacent flow gaps are staggered from the shell-side liquid inlet toward the shell-side liquid outlet. Flow holes are provided on the baffles. The shell-side medium is blocked by the baffles and flows along the flow gaps, increasing the length of its flow path within the heat exchange chamber, thereby increasing its contact time and area with the heat exchange tube bundle and improving the heat exchange efficiency of the coiled-tube heat exchanger. The baffles are provided with flow holes, through which a portion of the shell-side medium can flow. This reduces the pressure drop caused by the baffles blocking the shell-side medium and reduces dead angles caused by the shell-side medium bending along the flow gaps. This increases the flow range of the shell-side medium within the flow gaps and improves heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 This is a cross-sectional schematic diagram of the coiled-tube heat exchanger according to one embodiment of the present invention;

[0029] Figure 2This is a schematic cross-sectional view of a partial area of ​​the coiled-tube heat exchanger according to one embodiment of the present invention;

[0030] Figure 3 This is a cross-sectional schematic diagram of the spray element in one embodiment of the present invention;

[0031] Figure 4 This is a cross-sectional schematic diagram of the guide portion in one embodiment of the present invention;

[0032] Figure 5 This is a cross-sectional schematic diagram of the guide portion in another embodiment of the present invention;

[0033] Figure 6 This is a top view of the guide portion in one embodiment of the present invention;

[0034] Figure 7 It is a cross-sectional schematic diagram of a partial area of ​​the coiled-tube heat exchanger according to one embodiment of the present invention.

[0035] in:

[0036] 1 shell; 11 liquid inlet tube sheet; 12 liquid inlet cavity; 121 transition cavity; 122 bulk liquid cavity; 13 heat exchange cavity; 14 liquid inlet; 15 heat exchange tube bundle; 16 shell-side liquid inlet; 17 shell-side liquid outlet;

[0037] 2 separator; 21 guide portion; 211 flow guide transition surface; 212 through channel; 22 spray member; 221 main body; 222 spray port; 223 liquid inlet channel; 224 connecting channel; 225 diffuser cone; 2251 first end; 2252 second end; 23 side wall; 24 bottom wall;

[0038] 3. Baffle; 31. Flow gap; 32. Flow hole. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "embodiment", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0044] like Figure 1 and Figure 2As shown, a coiled heat exchanger comprises a shell 1, wherein a liquid inlet tube sheet 11 is provided in the shell 1, wherein the liquid inlet tube sheet 11 divides the interior of the shell 1 into a liquid inlet chamber 12 and a heat exchange chamber 13, wherein a liquid inlet port 14 is provided on the wall of the liquid inlet chamber 12, wherein a heat exchange tube bundle 15 is provided in the heat exchange chamber 13, wherein a connecting port connecting the liquid inlet chamber 12 and the heat exchange tube bundle 15 is provided on the liquid inlet tube sheet 11, wherein a partition 2 is provided in the liquid inlet chamber 12 to separate the heat exchange tube bundle 15 and the liquid inlet chamber 12. The liquid inlet chamber 12 is divided into a transition chamber 121 and a bulk liquid chamber 122. The liquid inlet 14 is connected to the transition chamber 121, and the bulk liquid chamber 122 is connected to the heat exchange tube bundle 15. The partition 2 is provided with a guide portion 21, which connects the transition chamber 121 and the bulk liquid chamber 122. The guide portion 21 can guide the flow direction of the heat exchange medium in the transition chamber 121 so that the heat exchange medium is dispersed and flows into the bulk liquid chamber 122.

[0045] The coiled-tube heat exchanger described in the present invention can be a shell-and-tube heat exchanger with a bundle of parallel heat exchange tubes installed within it. It can also be a spaced-apart heat exchanger such as a U-tube heat exchanger or a plate heat exchanger. The coiled-tube heat exchanger is cylindrical in shape, and the cross-section of the shell 1 can be circular, square, or other polygonal. Furthermore, the liquid inlet 14 and liquid outlet are coaxially arranged with the shell to minimize obstruction to the flow of the heat exchange medium within the heat exchange tube bundle.

[0046] The heat exchange tube bundle 15 is composed of a plurality of heat exchange tubes. The heat exchange tube bundle 15 is located within the shell 1, dividing the space within the shell 1 into a space within the heat exchange tube bundle 15 for the flow of the heat exchange medium, and a heat exchange cavity 13 between the heat exchange tube bundle 15 and the shell 1 for the flow of the shell-side medium. The plurality of heat exchange tubes are dispersed within the heat exchange cavity 13, so that the shell-side medium distributed within the heat exchange cavity 13 exchanges heat with the heat exchange medium within the heat exchange tube bundle 15 through the tube walls of the heat exchange tube bundle 15, thereby bringing the shell-side medium within the heat exchange cavity 13 to a suitable temperature. The coiled-tube heat exchanger can be used as a cooler, heater, condenser, vaporizer, and other equipment.

[0047] The liquid inlet ends of the plurality of heat exchange tubes are fixed to the liquid inlet tube sheet 11 and communicate with the liquid inlet cavity 12 through the liquid inlet tube sheet 11. The heat exchange medium in the liquid inlet cavity 12 is dispersed to the plurality of liquid inlet tubes through the liquid inlet tube sheet 11. However, the heat exchange medium passing through the liquid inlet cavity 12 flows primarily in the central region. The heat exchange medium flows more into the liquid inlet tubes fixed to the central region of the liquid inlet tube sheet 11, while less heat exchange medium flows into the liquid inlet tubes fixed to the peripheral region of the liquid inlet tube sheet 11. This results in uneven distribution of the heat exchange medium within the heat exchange tube bundle 15.

[0048] In the present invention, the partition 2 divides the liquid inlet chamber 12 into a transition chamber 121 and a bulk liquid chamber 122. The heat exchange medium enters the transition chamber 121 from the liquid inlet 14. After being blocked by the partition 2, the flow rate of the heat exchange medium slows down and the flow direction of the heat exchange medium is changed, preventing the heat exchange medium from flowing in a concentrated bundle. This increases the distribution range of the heat exchange medium within the transition chamber 121, thereby increasing the distribution range of the heat exchange medium after passing through the transition chamber 121 and flowing into the bulk liquid chamber 122. The heat exchange medium in the transition chamber flows into the bulk liquid chamber through the guide portion 21. The guide portion 21 can guide the flow direction of the heat exchange medium and promote the heat exchange medium to flow in a dispersed manner, thereby causing the heat exchange medium to flow in a dispersed manner toward the bulk liquid chamber 122, thereby improving the uniformity of the heat exchange medium distribution within the bulk liquid chamber 122. After the heat exchange medium flows to the liquid inlet tube sheet 11, part of the heat exchange medium enters the heat exchange tube bundle 15 through the communication port, while part of the heat exchange medium further disperses and flows on the liquid inlet tube sheet 11. As a result, the guide portion 21 and the liquid inlet tube sheet 11 cooperate to allow the heat exchange medium to undergo two dispersed flows before entering the heat exchange tube bundle 15, making the heat exchange medium more evenly distributed in the heat exchange tube bundle 15. This allows the shell-side medium and the heat exchange medium to exchange heat evenly through the tube wall of the heat exchange tube bundle 15, thereby improving the efficiency and uniformity of heat exchange.

[0049] The present invention does not limit the implementation method of the guide portion 21 guiding the dispersed flow of the heat exchange medium, and any one of the following implementations can be adopted.

[0050] Implementation method 1: Figure 2 As shown, the guide portion 21 includes at least one spray element 22. The spray element 22 has a main body 221 and a spray port 222 connected to the bulk liquid chamber 122. The spray port 222 surrounds the main body 221. The heat exchange medium flows into the bulk liquid chamber 122 through the spray port 222. The spray port 222 surrounds the main body 221. Firstly, it can prevent the heat exchange medium from flowing into the bulk liquid chamber 122 in a concentrated manner after passing through the spray element 22. The spray port 222 provides horizontal kinetic energy to the heat exchange medium. Secondly, the heat exchange medium flowing out of the spray port 222 can disperse in all directions relative to the spray element 22, thereby increasing the dispersed flow range of the heat exchange medium within the bulk liquid chamber 122.

[0051] The present invention does not limit the structural form of the spray port 222. The spray member 22 is provided with a spray port 222, and the spray port 222 extends in the direction surrounding the axis of the main body 221. Alternatively, the spray member 22 is provided with multiple spray ports 222, and the multiple spray ports 222 are arranged in the direction surrounding the axis of the main body 221. The distance between the adjacent spray ports 222 on the side of the spray member 22 facing the axis of the shell 1 is greater than the distance between the adjacent spray ports 222 on the side of the spray member 22 away from the axis of the shell 1.

[0052] As a preferred embodiment of this embodiment, Figure 3 As shown, the spray element 22 has a liquid inlet channel 223 connected to the transition chamber 121. The cross-sectional dimensions of the liquid inlet channel 223 gradually decrease toward the bulk liquid chamber 122. The end of the liquid inlet channel 223 facing the transition chamber 121 has a larger cross-sectional dimension, reducing blockages caused by the flow of heat exchange medium and facilitating the flow of more heat exchange medium into the liquid inlet channel 223, thereby allowing more heat exchange medium to flow into the heat exchange tube bundle 15, improving heat exchange efficiency. The cross-sectional dimensions of the liquid inlet channel 223 gradually decrease toward the bulk liquid chamber 122, gradually increasing the pressure of the heat exchange medium, increasing the flow velocity of the heat exchange medium out of the spray port 222, and thereby improving the dispersion of the heat exchange medium after passing through the spray element 22.

[0053] Preferably, Figure 3 As shown, the spray element 22 has a connecting channel 224 connecting the liquid inlet channel 223 and the spray outlet 222. A diffuser cone 225 is disposed within the connecting channel 224. The diffuser cone 225 has a first end 2251 facing the liquid inlet channel 223 and a second end 2252 facing the spray outlet 222. The cross-sectional size of the diffuser cone 225 gradually increases from the first end 2251 to the second end 2252, and the spray outlet 222 surrounds the outer side of the second end 2252. The outer surface of the diffuser cone 225 forms a diffuser surface facing the liquid inlet channel 223. Heat exchange medium flowing into the connecting channel 224 through the liquid inlet channel 223 is guided by the diffuser surface and evenly dispersed around the diffuser cone 225, thereby improving the uniformity of the heat exchange medium reaching the spray outlet 222 along the circumference of the main body 221. Moreover, in the communicating channel 224, after being guided by the diffusion cone 225, the heat exchange medium has horizontal kinetic energy to disperse horizontally in all directions. After flowing out through the spray port 222, the heat exchange medium can disperse in all directions, thereby increasing the distribution range of the heat exchange medium flowing out through the spray port 222 in the liquid dispersion chamber 122.

[0054] The present invention does not limit the number of the spraying parts 22. In one embodiment, the guide portion 21 includes one spraying part 22, and the spraying part 22 is coaxially arranged with the housing 1. After the heat exchange medium is guided by the spraying part 22, it sprays and flows around to improve the dispersion degree in the liquid dispersion chamber 122. In another embodiment, Figure 2 As shown, the guide portion 21 includes multiple spray elements 22, which are arranged around the housing axis to form multiple spray rings along the radial direction. The heat exchange medium is sprayed into the bulk liquid cavity 122 from multiple points, further improving the dispersion of the heat exchange medium within the bulk liquid cavity 122. The multiple spray elements arranged around the housing axis further improve the circumferential uniformity of the heat exchange medium within the bulk liquid cavity 122.

[0055] Implementation method 2: Figure 4 As shown, the central region of the separator 2 protrudes toward the liquid inlet 14 to form the guide portion 21. A flow-guiding transition surface 211, gradually decreasing in height from the center toward the periphery, is formed on the side of the guide portion 21 facing the liquid inlet 14. The guide portion 21 is provided with a through-channel 212 connecting the transition chamber 121 and the bulk liquid chamber 122. Multiple through-channels are arranged around the axis of the housing, forming a radial ring of through-channels. After the heat exchange medium enters the transition chamber 121 through the liquid inlet 14, more heat exchange medium is concentrated in the central region of the transition chamber 121. The central region of the separator 2 protrudes toward the liquid inlet 14, allowing some heat exchange medium to flow through the through-channel in the central region of the separator into the bulk liquid chamber. Other heat exchange medium, guided by the guide portion 21, disperses along the flow-guiding transition surface 211 and gradually flows through the through-channel 212 into the bulk liquid chamber 122 during this dispersed flow. In this way, the distribution uniformity of the heat exchange medium in the bulk liquid cavity 122 is improved, thereby improving the uniformity of the heat exchange medium in the heat exchange tube bundle 15 and further improving the heat exchange uniformity of the coiled tube heat exchanger.

[0056] Embodiment 3: The guide portion 21 includes a plurality of through-channels 212 opened in the partition 2 and connected to the transition chamber 121 and the bulk liquid chamber 122, and the heat exchange medium is dispersed and guided by the characteristic changes of the through-channels 212. As an example of this embodiment, Figure 5As shown, the through-channel 212 extends outwardly from the transition chamber 121 toward the bulk liquid chamber 122. In the radial direction away from the center of the partition 2, the angle between the extension direction of the through-channel 212 and the axis of the housing 1 gradually increases. Heat exchange medium flows from the transition chamber 121 into the bulk liquid chamber 122 through the through-channel 212.

[0057] The obliquely extending through-channels 212 guide the flow of the heat exchange medium, dispersing it in all directions and improving its uniformity within the bulk liquid chamber 122. Within the transition chamber 121, the heat exchange medium is concentrated in the central region. Guided by the through-channels 212, it is distributed over a wider area within the central region of the bulk liquid chamber 122. The through-channels 212 in the peripheral region extend at a relatively large angle to the axis, which not only encourages more heat exchange medium to disperse toward the periphery of the bulk liquid chamber 122 but also reduces the overlap between adjacent through-channels 212 flowing into the bulk liquid chamber 122. This improves the uniformity of the heat exchange medium's distribution within the bulk liquid chamber 122, ensuring a uniform flow to the heat exchange tube bundle 15.

[0058] As another example under this embodiment, Figure 6 As shown, the porosity of the separator 2 gradually increases in the radial direction away from the center of the separator 2. Within the transition chamber 121, the heat exchange medium flows more concentratedly in the central region. The lower porosity of the central region of the separator 2 reduces the amount of heat exchange medium flowing through the through-channel 212 into the bulk liquid chamber 122, thereby reducing the concentration of heat exchange medium in the central region of the bulk liquid chamber 122. Some heat exchange medium is blocked by the separator 2 and dispersed to the surrounding areas. The relatively higher porosity around the periphery of the separator 2 increases the amount of heat exchange medium flowing through the through-channel 212 into the bulk liquid chamber 122, improving the dispersion of the heat exchange medium within the bulk liquid chamber 122.

[0059] The present invention does not limit the implementation method of changing the aperture ratio. The aperture ratio can be changed by changing the cross-sectional size of the through channel 212 , or by changing the spacing between adjacent through channels 212 .

[0060] In the present invention, the above three embodiments can be implemented separately to achieve the function of dispersing the heat exchange medium into the dispersion chamber 122. The above three embodiments can also be freely combined for use. For example, the middle area of ​​the partition 2 is arched upward, and a plurality of the spraying elements 22 are arranged on the partition 2. The spraying elements 22 are installed in the through-channel position of the arched middle area.

[0061] Alternatively, the middle area of ​​the separator 2 is arched upward, and a plurality of through channels are provided on the arch of the separator 2. In the radial direction away from the center of the separator 2, the opening rate of the separator 2 gradually increases.

[0062] As a preferred embodiment of the present invention, Figure 2 As shown, the separator 2 further includes sidewalls 23 and a bottom wall 24 extending toward the liquid inlet 14. The sidewalls 23 and bottom wall 24 enclose the transition chamber 121. The cross-sectional dimensions of the transition chamber 121 gradually decrease toward the liquid inlet 14. The sidewalls 23 are provided with spirally extending flow-guiding protrusions that protrude toward the transition chamber 121, with flow channels formed between the backflow protrusions. The cross-sectional dimensions of the transition chamber 121 gradually decrease toward the liquid inlet 14. As the heat exchange medium flows within the transition chamber 121, the radial constraint exerted by the sidewalls 23 on the heat exchange medium decreases, allowing the heat exchange medium to generate a certain degree of dispersed flow within the transition chamber 121. Furthermore, after passing through the transition chamber 121, the flow velocity of the heat exchange medium decreases, enabling the guide portion 21 to better guide and disperse the heat exchange medium. The flow-guiding protrusions arranged on the side walls 23 have a blocking effect on the heat exchange medium flowing in the transition chamber 121, and can promote the heat exchange medium to generate a spiral circulation in the flow channel, thereby increasing the horizontal flow of the heat exchange medium in the transition chamber 121, thereby increasing the uniformity of the distribution of the heat exchange medium in the transition chamber 121.

[0063] As a preferred embodiment of the present invention, Figure 7 As shown, the shell 1 is provided with a shell-side liquid inlet 16 and a shell-side liquid outlet 17 that communicate with the heat exchange chamber 13. The shell-side liquid inlet 16 and the shell-side liquid outlet 17 are located on both sides of the shell 1 in the radial direction. When the shell-side medium flows along the shell-side liquid inlet 16 toward the shell-side liquid outlet 17, it can generate a radially inclined flow, thereby crossing all of the heat exchange tube bundles 15 within the flow range and exchanging heat with the heat exchange medium in all of the heat exchange tube bundles 15, so as to fully utilize the heat exchange capacity of the heat exchange tube bundles 15 and improve the heat exchange efficiency of the coiled heat exchanger. Preferably, the shell-side liquid inlet 16 and the shell-side liquid outlet 17 are respectively located on both sides of the shell 1 in the radial direction and on both sides of the shell 1 in the axial direction, thereby increasing the flow path length between the shell-side liquid inlet 16 and the shell-side liquid outlet 17.

[0064] Preferably, Figure 7As shown, multiple baffles 3 are disposed within the heat exchange chamber 13 between the shell-side liquid inlet 16 and the shell-side liquid outlet 17. A flow gap 31 is defined between each baffle 3 and the inner wall of the shell 1. Adjacent flow gaps 31 are staggered from the shell-side liquid inlet 16 toward the shell-side liquid outlet 17. Each baffle 3 is provided with flow holes 32. The planar extension direction of the multiple baffles is perpendicular to the axis of the shell. The shell-side liquid inlet 16 and the shell-side liquid outlet 17 are located on either side of the axis of the shell 1. When the shell-side medium flows from the shell-side liquid inlet 16 to the shell-side liquid outlet 17, it is blocked by the baffles 3 and flows along the flow gaps 31. This increases the flow path length of the shell-side medium within the heat exchange chamber 13, thereby increasing the contact time and area with the heat exchange tube bundle 15 and improving the heat exchange efficiency of the coiled heat exchanger.

[0065] When the shell-side medium flows around the baffle 3, a significant pressure drop occurs, slowing the flow rate and reducing the heat exchange efficiency. Shell-side medium is retained in some areas, forming flow dead zones, which hinder heat exchange between the shell-side medium and the heat exchange medium. The baffle 3 is provided with flow holes 32, through which some shell-side medium can flow. This reduces the pressure drop caused by the shell-side medium being blocked by the baffle 3 and reduces the flow dead zones caused by the shell-side medium bending along the flow gap 31. This increases the flow rate of the shell-side medium within the heat exchange chamber 13, thereby improving heat exchange efficiency.

[0066] Anything not described in this utility model can be achieved by adopting or drawing on existing technologies.

[0067] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0068] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A coiled heat exchanger, comprising a shell, a liquid inlet tube sheet disposed within the shell, the liquid inlet tube sheet dividing the interior of the shell into a liquid inlet chamber and a heat exchange chamber, a liquid inlet port being provided on a wall of the liquid inlet chamber, a heat exchange tube bundle being provided in the heat exchange chamber, and a communication port being provided on the liquid inlet tube sheet connecting the liquid inlet chamber and the heat exchange tube bundle, characterized in that: A partition is provided in the liquid inlet cavity to divide the liquid inlet cavity into a transition cavity and a bulk liquid cavity. The liquid inlet is connected to the transition cavity, and the bulk liquid cavity is connected to the heat exchange tube bundle. The partition is provided with a guide portion, which connects the transition cavity and the bulk liquid cavity. The guide portion can guide the flow direction of the heat exchange medium in the transition cavity so that the heat exchange medium is dispersed and flows into the bulk liquid cavity.

2. The coiled pipe heat exchanger according to claim 1, characterized in that: The guide portion includes at least one spraying member, which has a main body and a spraying port communicating with the liquid dispersion chamber, and the spraying port surrounds the main body.

3. The coiled pipe heat exchanger according to claim 2, characterized in that: The spraying element has a liquid inlet channel connected to the transition chamber, and the cross-sectional size of the liquid inlet channel gradually decreases toward the liquid dispersing chamber.

4. The coiled pipe heat exchanger according to claim 3, characterized in that: The spray element has a connecting channel connecting the liquid inlet channel and the spray port, and a diffuser cone is provided in the connecting channel. The diffuser cone has a first end facing the liquid inlet channel and a second end facing the spray port. The cross-sectional size of the diffuser cone gradually increases from the first end to the second end, and the spray port is surrounded on the outside of the second end.

5. The coiled pipe heat exchanger according to claim 2, characterized in that: The guide portion includes a spraying member, and the spraying member is coaxially arranged with the housing, or, The guide portion includes a plurality of spraying elements, and the plurality of spraying elements are arranged around the axis of the shell.

6. The coiled pipe heat exchanger according to claim 1, characterized in that: The central area of ​​the partition protrudes toward the liquid inlet to form the guide portion, so as to form a flow-guiding transition surface with a height gradually decreasing from the center to the periphery on the side of the guide portion facing the liquid inlet, and the guide portion is provided with a through channel connecting the transition chamber and the bulk liquid chamber.

7. The coiled pipe heat exchanger according to claim 1, characterized in that: The guide portion includes a plurality of through channels opened in the partition and connected to the transition chamber and the bulk liquid chamber; The through channel extends outwardly from the transition chamber toward the bulk liquid chamber, and in a radial direction away from the center of the partition, the angle between the extension direction of the through channel and the axis of the housing gradually increases; And / or, the opening ratio of the partition increases gradually in the radial direction away from the center of the partition.

8. The coiled pipe heat exchanger according to claim 1, characterized in that: The partition also has side walls and a bottom wall extending toward the liquid inlet, and the side walls and the bottom wall enclose the transition cavity. The cross-sectional size of the transition cavity gradually decreases toward the liquid inlet, and the side wall is provided with a spirally extending guide protrusion protruding toward the transition cavity, and a flow channel is formed between the guide protrusions.

9. The coiled pipe heat exchanger according to claim 1, characterized in that: The shell is provided with a shell-side liquid inlet and a shell-side liquid outlet communicating with the heat exchange cavity. The shell-side liquid inlet and the shell-side liquid outlet are located on both sides of the shell in a radial direction.

10. The coiled pipe heat exchanger according to claim 9, characterized in that: A plurality of baffles are arranged inside the heat exchange chamber between the shell-side liquid inlet and the shell-side liquid outlet, and a flow gap is provided between the baffle and the inner wall of the shell. From the shell-side liquid inlet to the shell-side liquid outlet, adjacent flow gaps are staggered, and flow holes are provided on the baffle.

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