A shell-and-tube heat exchanger

Abstract

The utility model discloses a kind of tube and shell heat exchangers, it is related to heat exchange device technical field, its technical scheme includes shell, U-shaped pipe and heat exchange tube, the shell inside is fixedly connected with exchange box, the exchange box inner wall is fixedly connected with heat exchange plate, the through-hole is set in the heat exchange plate inside, the heat exchange tube is set in heat exchange plate inside, the heat exchange tube outer wall shape is matched with the shape of through-hole inner wall, the heat exchange tube outer wall is symmetrically set with thread groove, the U-shaped pipe is symmetrically rotatably connected with thread cylinder near heat exchange tube one end, the shape of thread cylinder inner wall is matched with the shape of thread groove outer wall, in the utility model, by setting heat exchange tube, heat exchange plate, U-shaped pipe and exchange box, cold water is used as cooling medium to improve condensing efficiency, temperature exchange transmission is carried out between cold water in heat exchange tube and external hot steam, hot steam is cooled into liquid, and is collected, can effectively improve condensing efficiency in the preparation process of litsea cubeba oil.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange device technology, and in particular to a shell-and-tube heat exchanger. Background Technology

[0002] In the preparation of Litsea cubeba oil, distillation is usually used. Litsea cubeba is ground into powder, placed in a still, and an appropriate amount of water is added for distillation. Through distillation, the oil and water in the Litsea cubeba mixture are converted into steam. The steam is cooled and turns back into liquid. The condensed liquid is collected in a container. Among these processes, the condensation process is a key step. The condensation process is usually used to cool the evaporated solvent or water vapor into liquid form for further processing or recycling.

[0003] Currently, traditional condensers typically use air for cooling. This involves passing cold air through hot steam, causing it to dissipate heat and condense into liquid. However, air has a relatively low heat capacity, requiring a large amount of gas and a long time to achieve effective cooling, resulting in low efficiency. Therefore, a new condensation method is needed to cool the steam, leading to the development of a shell-and-tube heat exchanger. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of low air cooling efficiency in existing technologies by proposing a shell-and-tube heat exchanger.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a shell-and-tube heat exchanger, comprising a shell, a U-shaped tube, and heat exchange tubes. An exchange chamber is fixedly connected inside the shell, and a heat exchange plate is fixedly connected to the inner wall of the exchange chamber. A through hole is opened inside the heat exchange plate. The heat exchange tubes are disposed inside the heat exchange plate. The outer wall shape of the heat exchange tubes matches the inner wall shape of the through hole. Threaded grooves are symmetrically opened on the outer wall of the heat exchange tubes. A threaded cylinder is symmetrically rotatably connected to one end of the U-shaped tube near the heat exchange tube. The inner wall shape of the threaded cylinder matches the outer wall shape of the threaded groove. A sealing ring is provided at one end of the threaded cylinder near the heat exchange tube. A cold water inlet is fixedly connected to the outer wall of the shell. The bottom of the inner wall of the exchange chamber is shaped as a slope. A hot water recovery and utilization assembly is disposed inside the shell. The hot water recovery and utilization assembly includes a hot water distribution pipe, a hot water guide pipe, and a connecting pipe.

[0006] As a further description of the above technical solution: The connecting pipes are arranged on both sides of the heat exchange pipe. The hot water guide pipe is fixedly connected to the connecting pipe on the side closer to the hot water branch pipe, and the cold water inlet is fixedly connected to the connecting pipe on the side away from the hot water branch pipe.

[0007] As a further description of the above technical solution: The hot water diversion pipe is fixedly connected to the side wall of the heat exchange tank, the hot water distribution pipe is fixedly connected to the outer wall of the hot water diversion pipe, and a return pipe is detachably connected to the end of the hot water diversion pipe away from the heat exchange tank.

[0008] As a further description of the above technical solution: The return pipe is fixedly connected to a boiler at the end away from the hot water guide pipe. The boiler is fixedly connected inside the outer shell. A steam valve is fixedly connected to the top of the outer wall of the boiler. A steam distribution pipe is fixedly connected to the end of the steam valve away from the boiler.

[0009] As a further description of the above technical solution: An extraction tank is fixedly connected to the top of the steam diversion pipe, a separation tank is fixedly connected to the top of the extraction tank, a mixed gas guide pipe is fixedly connected to the top of the separation tank, and the end of the mixed gas guide pipe away from the separation tank is fixedly connected to the side wall of the exchange box. A sealing ring prevents condensate from seeping or leaking from the U-shaped pipe connection.

[0010] As a further description of the above technical solution: A reflux valve is fixedly connected to the outer wall of the hot water diversion pipe on the side away from the hot water guide pipe. The bottom of the outer wall of the reflux valve is fixedly connected to the outer wall of the extraction tank. A collection cylinder is fixedly connected to the bottom of the exchange tank. A collection box is detachably connected to the end of the collection cylinder away from the exchange tank for collecting the cooled liquid.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 0. In this utility model, by setting up heat exchange tubes, heat exchange plates, U-shaped tubes and exchange boxes, and using cold water as the cooling medium, the condensation efficiency is improved. The cold water in the heat exchange tubes exchanges temperature with the external hot steam, cools the hot steam into liquid, and collects it. This can effectively improve the condensation efficiency in the preparation process of Litsea cubeba oil. At the same time, if the heat exchange tubes become blocked, the U-shaped tubes can be disassembled by rotating the threaded cylinder, and the heat exchange tubes can be taken out from the exchange plate for maintenance or replacement.

[0012] 0. In this utility model, by setting up a hot water recovery and utilization component, part of the hot water generated in the exchange tank can enter the boiler through the hot water circulation loop to generate superheated steam for extracting Litsea cubeba oil, thereby realizing the recovery and utilization of heat energy and reducing resource waste. The other part of the hot water can enter the extraction tank to pre-soak the Litsea cubeba fruit, thereby improving the extraction efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a shell-and-tube heat exchanger proposed in this utility model. Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the first part of the structure of this utility model; Figure 4 This is a schematic diagram of the second part of the structure of this utility model; Figure 5 This is a schematic diagram of the third part of the structure of this utility model; Figure 6 This is a schematic diagram of the fourth part of the structure of this utility model; Figure 7 This is a schematic diagram of the fifth part of the structure of this utility model; Figure 8 This is a schematic diagram of the sixth part of the structure of this utility model.

[0014] In the diagram: 1. Outer shell; 2. Exchange tank; 3. Cold water inlet; 4. Collection tank; 5. Hot water distribution pipe; 6. Hot water guide pipe; 7. Return pipe; 8. Threaded cylinder; 9. Steam valve; 10. Boiler; 11. Steam distribution pipe; 12. Extraction tank; 13. Separation tank; 14. Return valve; 15. Heat exchange plate; 16. U-shaped tube; 17. Collection cylinder; 18. Mixed gas guide pipe; 19. Connecting pipe; 20. Through hole; 21. Heat exchange tube; 22. Threaded groove; 23. Sealing ring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] Reference Figures 1-8 This utility model provides an embodiment of a shell-and-tube heat exchanger, comprising a shell 1, a U-shaped tube 16, and a heat exchange tube 21. An exchange box 2 is fixedly connected inside the shell 1, and a heat exchange plate 15 is fixedly connected to the inner wall of the exchange box 2. A through hole 20 is opened inside the heat exchange plate 15. The heat exchange tube 21 is disposed inside the heat exchange plate 15. The outer wall shape of the heat exchange tube 21 matches the inner wall shape of the through hole 20. Threaded grooves 22 are symmetrically opened on the outer wall of the heat exchange tube 21. A threaded cylinder 8 is symmetrically rotatably connected to one end of the U-shaped tube 16 near the heat exchange tube 21. The inner wall shape of the threaded cylinder 8 matches the outer wall shape of the threaded groove 22. A sealing ring 23 is provided at one end of the threaded cylinder 8 near the heat exchange tube 21. A cold water inlet 3 is fixedly connected to the outer wall of the shell 1. The bottom of the inner wall of the exchange box 2 is shaped as a slope. A hot water recovery and utilization assembly is provided inside the shell 1. The hot water recovery and utilization assembly includes a hot water diversion pipe 5, a hot water guide pipe 6, and a connecting pipe 19.

[0018] During the heat exchange process, condensate that has been used for a long time can easily form an adsorption layer on the inner wall of the heat exchange tube 21. If the inner wall of the heat exchange tube 21 becomes blocked, the U-shaped tube 16 can be disassembled by rotating the threaded cylinder 8, and the heat exchange tube 21 can be taken out from the heat exchange plate 15 for maintenance or replacement.

[0019] Connecting pipes 19 are installed on both sides of heat exchange tube 21. Hot water guide pipe 6 is fixedly connected to the connecting pipe 19 on the side closer to hot water branch pipe 5. Cold water inlet 3 is fixedly connected to the connecting pipe 19 on the side away from hot water branch pipe 5. Hot water guide pipe 6 is fixedly connected to the side wall of heat exchange tank 2. Hot water branch pipe 5 is fixedly connected to the outer wall of hot water guide pipe 6. A return pipe 7 is detachably connected to the end of hot water guide pipe 6 away from heat exchange tank 2. A boiler 10 is fixedly connected to the end of return pipe 7 away from hot water guide pipe 6. Boiler 10 is fixedly connected inside outer shell 1. A steam valve 9 is fixedly connected to the top of the outer wall of boiler 10. Steam valve 9 is located away from the boiler. A steam distribution pipe 11 is fixedly connected to one end of the furnace 10. An extraction tank 12 is fixedly connected to the top of the steam distribution pipe 11. A separation tank 13 is fixedly connected to the top of the extraction tank 12. A mixed gas guide pipe 18 is fixedly connected to the top of the separation tank 13. The end of the mixed gas guide pipe 18 away from the separation tank 13 is fixedly connected to the side wall of the exchange box 2. A return valve 14 is fixedly connected to the outer wall of the hot water distribution pipe 5 away from the hot water guide pipe 6. The bottom of the outer wall of the return valve 14 is fixedly connected to the outer wall of the extraction tank 12. A collection cylinder 17 is fixedly connected to the bottom of the exchange box 2. A collection box 4 is detachably connected to the end of the collection cylinder 17 away from the exchange box 2.

[0020] The heat exchange plate 15 is made of neatly arranged stainless steel metal, and the heat exchange tube 21 is made of cylindrical stainless steel metal and is set inside the heat exchange plate 15. Stainless steel has a high thermal conductivity to achieve a more efficient heat exchange effect, and can transfer heat faster to achieve a more efficient heat exchange effect.

[0021] Working principle: The Litsea cubeba fruit to be distilled is placed in the extraction tank 12. The boiler 10 is started to heat the water inside to superheated steam. The steam valve 9 is opened, and the superheated steam is introduced into the extraction tank 12 through the steam diverter pipe 11 to distill the fruit inside the extraction tank, obtaining water-oil mixed steam. The water-oil mixed steam passes through the separator 13 to remove impurities. Finally, it enters the exchange tank 2 through the mixed gas guide pipe 18. The cold water inlet 3 is connected to the cold water supply. The cold water passes through the cooling circuit formed by the heat exchange pipe 21 and the U-shaped pipe 16 to cool the water. The heat exchange plate 15 is used for cooling. Water-oil mixed steam comes into contact with the heat exchange plate 15 to exchange heat. The water-oil steam will turn back into liquid on the outer wall of the heat exchange plate 15. The condensed liquid will be collected in the collection box 4. The hot water generated by the heat exchange flows into the hot water guide pipe 6. Part of it will enter the extraction tank 12 through the hot water diversion pipe 5 to soak the Litsea cubeba fruit, thereby improving the extraction efficiency. The other part will enter the boiler 10 to generate superheated steam for extracting Litsea cubeba oil, thereby realizing the recovery and utilization of heat energy and reducing the resources required to heat the boiler 10.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shell-and-tube heat exchanger, comprising a shell (1), a U-shaped tube (16), and heat exchange tubes (21), characterized in that, An exchange box (2) is fixedly connected inside the outer shell (1). A heat exchange plate (15) is fixedly connected to the inner wall of the exchange box (2). A through hole (20) is opened inside the heat exchange plate (15). A heat exchange tube (21) is arranged inside the heat exchange plate (15). The shape of the outer wall of the heat exchange tube (21) matches the shape of the inner wall of the through hole (20). Threaded grooves (22) are symmetrically opened on the outer wall of the heat exchange tube (21). A U-shaped tube (16) is symmetrically rotatably connected to one end near the heat exchange tube (21). The inner wall of the threaded cylinder (8) matches the outer wall of the threaded groove (22). A sealing ring (23) is provided at one end of the threaded cylinder (8) near the heat exchange tube (21). A cold water inlet (3) is fixedly connected to the outer wall of the outer shell (1). The bottom of the inner wall of the exchange box (2) is shaped as an inclined surface. A hot water recycling component is provided inside the outer shell (1). The hot water recycling component includes a hot water diversion pipe (5), a hot water guide pipe (6), and a connecting pipe (19).

2. A shell-and-tube heat exchanger according to claim 1, characterized in that, The connecting pipe (19) is set on both sides of the heat exchange pipe (21). The hot water guide pipe (6) is fixedly connected to the connecting pipe (19) on the side closer to the hot water branch pipe (5). The cold water inlet (3) is fixedly connected to the connecting pipe (19) on the side away from the hot water branch pipe (5).

3. A shell-and-tube heat exchanger according to claim 1, characterized in that, The hot water guide pipe (6) is fixedly connected to the side wall of the exchange box (2), the hot water branch pipe (5) is fixedly connected to the outer wall of the hot water guide pipe (6), and the end of the hot water guide pipe (6) away from the exchange box (2) is detachably connected to a return pipe (7).

4. A shell-and-tube heat exchanger according to claim 3, characterized in that, The return pipe (7) is fixedly connected to a boiler (10) at one end away from the hot water guide pipe (6). The boiler (10) is fixedly connected inside the outer shell (1). A steam valve (9) is fixedly connected to the top of the outer wall of the boiler (10). A steam diversion pipe (11) is fixedly connected to the end of the steam valve (9) away from the boiler (10).

5. A shell-and-tube heat exchanger according to claim 4, characterized in that, The top end of the steam diversion pipe (11) is fixedly connected to an extraction tank (12), the top end of the extraction tank (12) is fixedly connected to a separation tank (13), the top end of the separation tank (13) is fixedly connected to a mixed gas guide pipe (18), and the end of the mixed gas guide pipe (18) away from the separation tank (13) is fixedly connected to the side wall of the exchange box (2).

6. A shell-and-tube heat exchanger according to claim 1, characterized in that, A return valve (14) is fixedly connected to the outer wall of the hot water diversion pipe (5) away from the hot water guide pipe (6). The bottom of the outer wall of the return valve (14) is fixedly connected to the outer wall of the extraction tank (12). A collection cylinder (17) is fixedly connected to the bottom of the exchange box (2). A collection box (4) is detachably connected to the end of the collection cylinder (17) away from the exchange box (2).

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