Multi-stream coiled tube heat exchanger

Abstract

The utility model discloses a multi-stream coiled tube heat exchanger, which relates to the technical field of heat exchangers, and comprises a shell and a central tube used for winding spiral heat exchange tubes, a plurality of liquid inlet tubes and liquid outlet tubes are arranged on the side wall of the shell, and damping devices for fixing the heat exchange tubes are arranged at the positions of the liquid inlet tubes and the liquid outlet tubes. An upper tube plate and a lower tube plate which are used for fixing the central tube are arranged in the shell, and a shell pass liquid inlet tube and a shell pass liquid outlet tube are respectively arranged at the upper end and the lower end of the shell. The multiple liquid inlet pipes and the multiple liquid outlet pipes are arranged and connected with the winding pipe heat exchangers in a one-to-one correspondence mode, heat exchange of multiple kinds of fluid is achieved, and the heat exchange efficiency of the heat exchangers is improved; meanwhile, in consideration of the fact that the service life of the heat exchanger is affected by vibration generated during fluid impact in the operation process of the large heat exchanger, vibration reduction devices are arranged on the liquid inlet pipe and the liquid outlet pipe, the vibration generated during work of the heat exchanger is buffered and damped, and the service life of the heat exchanger is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a multi-stream bypass heat exchanger. Background Art

[0002] The wound tube heat exchanger is a high-efficiency heat exchanger, which usually includes a shell, a center tube and a wound tube bundle arranged between the shell and the center tube. The wound tube bundle usually includes multiple wound tubes, which are alternately wound in the space between the shell and the inner tube in a spiral shape. The spiral directions of the two adjacent layers of spiral wound tubes are opposite, and a certain shape of spacers are used to maintain a certain distance. Compared with ordinary shell-and-tube heat exchangers, the wound tube heat exchanger has the advantages of a wide temperature range, adaptability to thermal shock, self-elimination of thermal stress, and high compactness. The wound tube heat exchanger is widely used in chemical, air separation, LNG liquefaction and other equipment due to its compact structure and high heat exchange efficiency. In recent years, its application in hydrogenation equipment has also gradually increased. The use of wound tube heat exchangers can greatly improve heat exchange efficiency, reduce fuel gas consumption, and reduce production costs.

[0003] Most existing wound tube heat exchangers are single-flow heat exchangers, that is, one medium flows in each of the shell side and the tube side. Such a structure results in low heat exchange efficiency; and vibration during operation of large heat exchangers will affect the service life. Utility Model Content

[0004] The utility model aims to provide a multi-stream wound tube heat exchanger to solve the problems of single heat exchange medium and vibration affecting the service life of the existing wound tube heat exchanger.

[0005] To achieve the above-mentioned purpose, the utility model provides a multi-stream tube-wound heat exchanger, including a shell and a central tube for winding a spiral heat exchange tube, a plurality of liquid inlet pipes and liquid outlet pipes are arranged on the side wall of the shell, and vibration damping devices for fixing the heat exchange tubes are arranged at the liquid inlet pipes and the liquid outlet pipes, an upper tube plate and a lower tube plate for fixing the central tube are arranged in the shell, and a shell-side liquid inlet pipe and a shell-side liquid outlet pipe are respectively arranged at the upper and lower ends of the shell.

[0006] Furthermore, the liquid inlet pipes include a plurality of first liquid inlet pipes arranged obliquely above the upper tube plate and a plurality of second liquid inlet pipes arranged horizontally below the upper tube plate.

[0007] Furthermore, the liquid outlet pipes include a plurality of inclined first liquid outlet pipes located below the lower tube plate and a plurality of horizontally arranged second liquid outlet pipes located above the lower tube plate.

[0008] Furthermore, the first liquid inlet pipe and the first liquid outlet pipe correspond one to one and are connected through the spiral heat exchange tube, and the second liquid inlet pipe and the second liquid outlet pipe correspond one to one and are connected through the spiral heat exchange tube.

[0009] Furthermore, a heat exchange tube sheet for fixing the spiral heat exchange tube is provided in each of the first liquid inlet pipe, the first liquid outlet pipe, the second liquid inlet pipe and the second liquid outlet pipe.

[0010] Furthermore, the vibration reduction device comprises a support frame fixed to the inner wall of the shell, and the support frame is provided with a plurality of fastening rings for binding and fixing the heat exchange tubes.

[0011] Furthermore, the fastening ring is a movable fixing device whose ring opening can be adjusted.

[0012] Furthermore, the upper tube plate is provided with a first stress groove, and the lower tube plate is provided with a second stress groove. Furthermore, the inner wall of the shell is provided with a spoiler.

[0013] Furthermore, the spoiler is fixedly connected to the inner wall of the shell between the upper tube plate and the lower tube plate, and the spoiler is a spiral plate.

[0014] The present application provides a plurality of liquid inlet pipes and liquid outlet pipes, which are respectively connected to the wound tube heat exchanger in a one-to-one correspondence, so as to realize heat exchange of multiple fluids and improve the heat exchange efficiency of the heat exchanger. At the same time, considering that the vibration generated by the fluid impact during the operation of a large heat exchanger affects the service life of the heat exchanger, vibration reduction devices are provided at the liquid inlet pipe and the liquid outlet pipe to buffer and reduce the vibration during the operation of the heat exchanger. At the same time, stress grooves are provided on the upper tube plate and the lower tube plate to buffer the impact force of the fluid on the tube plate and extend the service life of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 on the present invention. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model in one embodiment;

[0017] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure in the middle.

[0018] List of parts and reference numerals:

[0019] 1. Shell, 2. Center tube, 3. First liquid inlet pipe, 4. First liquid outlet pipe, 5. Second liquid inlet pipe, 6. Second liquid outlet pipe, 7. Shell-side liquid inlet pipe, 8. Shell-side liquid outlet pipe, 9. Spiral heat exchange tube, 10. Upper tube plate, 101. First stress groove, 11. Lower tube plate, 1101. Second stress groove, 12. Flow spoiler, 13. Vibration reduction device, 131. Support frame, 132. Fastening ring. DETAILED DESCRIPTION

[0020] 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.

[0021] It should be noted that many specific details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific implementation methods disclosed below.

[0022] In the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0023] Embodiment 1:

[0024] like Figure 1 and Figure 2 As shown, a multi-stream bypass heat exchanger includes a shell 1 and a central tube 2 for winding a spiral heat exchange tube 9. A plurality of liquid inlet pipes and liquid outlet pipes are arranged on the side wall of the shell 1. The liquid inlet pipes and the liquid outlet pipes are both provided with a vibration reduction device 13 for fixing the heat exchange tubes. An upper tube sheet 10 and a lower tube sheet 11 for fixing the central tube 2 are arranged in the shell 1. A shell-side liquid inlet pipe 7 and a shell-side liquid outlet pipe 8 are respectively arranged at the upper and lower ends of the shell 1.

[0025] The present application realizes the inflow and outflow of fluid in the shell side of the heat exchanger by arranging a shell side liquid inlet pipe 7 and a shell side liquid outlet pipe 8 on the shell 1; realizes heat exchange with multiple fluids in the tube side of the heat exchanger by arranging multiple one-to-one corresponding liquid inlet pipes and liquid outlet pipes on the shell 1, thereby improving the heat exchange efficiency; and limits and slows down the vibration of the heat exchange tube during operation by arranging vibration reduction devices 13 at both the liquid inlet pipe and the liquid outlet pipe, thereby improving the service life of the heat exchanger.

[0026] As a preferred implementation manner of this embodiment, the liquid inlet pipes include a plurality of inclined first liquid inlet pipes 3 located above the upper tube plate 10 and a plurality of horizontally arranged second liquid inlet pipes 5 located below the upper tube plate 10 .

[0027] By arranging the first liquid inlet pipe 3 above the upper tube plate 10 and the second liquid inlet pipe 5 below the upper tube plate 10, and by properly arranging the positions of the liquid inlet pipes on the shell 1, multiple liquid inlet pipes can be arranged to achieve heat exchange for multiple fluid media. Because the upper end of the heat exchanger is arc-shaped, considering the convenience of bending the heat exchange tube and the inflow of fluid, the first liquid inlet pipe 3 is arranged as follows Figure 1 Tilt setting shown.

[0028] As a preferred implementation of this embodiment, the liquid outlet pipes include a plurality of inclined first liquid outlet pipes 4 located below the lower tube plate 11 and a plurality of horizontally arranged second liquid outlet pipes 6 located above the lower tube plate 11. Further, the first liquid inlet pipe 3 corresponds to the first liquid outlet pipe 4 one by one and is connected through the spiral heat exchange pipe 9, and the second liquid inlet pipe 5 corresponds to the second liquid outlet pipe 6 one by one and is connected through the spiral heat exchange pipe 9.

[0029] By arranging the first liquid outlet pipe 4 below the lower tube plate 11 and the second liquid outlet pipe 6 above the lower tube plate 11, the positions of the multiple liquid outlet pipes are reasonably arranged to achieve reasonable utilization of the space of the shell 1. The liquid inlet pipe and the liquid outlet pipe are connected one by one through the spiral heat exchange tube 9. The positions of the spiral heat exchange tube 9 in the shell 1 are reasonably arranged to improve the utilization rate of the space in the shell 1, thereby improving the heat exchange efficiency while meeting the heat exchange of multiple fluids.

[0030] As a preferred implementation of this embodiment, a heat exchange tube sheet for fixing the spiral heat exchange tube 9 is provided in the first liquid inlet pipe 3 , the first liquid outlet pipe 4 , the second liquid inlet pipe 5 and the second liquid outlet pipe 6 .

[0031] As a preferred implementation of this embodiment, the vibration reduction device 13 includes a support frame 131 fixed to the inner wall of the housing 1, and a plurality of fastening rings 132 for binding and fixing the heat exchange tubes are provided on the support frame 131. The fastening ring 132 is a movable fixing device with an adjustable ring opening.

[0032] like Figure 2 The shock absorbing device includes a support frame 131. The setting direction of the support frame 131 is consistent with the direction of the heat exchange tube. The heat exchange tube and the support frame 131 are fixed together by a fastening ring 132, which limits and reduces the vibration of the heat exchanger during operation, thereby increasing the service life of the heat exchange tube, that is, increasing the service life of the heat exchanger.

[0033] As a preferred implementation of this embodiment, a first stress groove 101 is provided on the upper tube plate 10 , and a second stress groove 1101 is provided on the lower tube plate 11 .

[0034] By respectively providing the first stress groove 101 and the second stress groove 1101 on the upper tube sheet 10 and the lower tube sheet 11 to release the stress generated during operation, the service life of the upper tube sheet 10 and the lower tube sheet 11 is increased, that is, the service life of the heat exchanger is increased. Figure 1 As shown, the first stress groove 101 and the second stress groove 1101 are designed as semicircular structures.

[0035] As a preferred implementation of this embodiment, the inner wall of the shell 1 is provided with a spoiler 12. The spoiler 12 is fixedly connected to the inner wall of the shell 1 between the upper tube plate 10 and the lower tube plate 11, and the spoiler 12 is a spiral plate.

[0036] By arranging a spiral flow disturbance device 12 on the inner wall of the shell 1, the flow disturbance of the fluid in the shell side of the heat exchanger is increased, and the heat exchange efficiency of the shell side fluid and the process in the heat exchange tube is improved.

[0037] The present application provides a plurality of liquid inlet pipes and liquid outlet pipes, which are respectively connected to the wound tube heat exchanger in a one-to-one correspondence, so as to realize heat exchange of multiple fluids and improve the heat exchange efficiency of the heat exchanger. At the same time, considering that the vibration generated by the fluid impact during the operation of a large heat exchanger affects the service life of the heat exchanger, a vibration reduction device 13 is provided at the liquid inlet pipe and the liquid outlet pipe to buffer and reduce the vibration during the operation of the heat exchanger. At the same time, stress grooves are provided on the upper tube plate 10 and the lower tube plate 11 to buffer the impact force of the fluid on the tube plate and extend the service life of the heat exchanger.

[0038] The technical solution protected by the present utility model is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any embodiment with the technical solution of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present utility model are within the scope of protection claimed by the present utility model.

Claims

1. A multi-stream bypass heat exchanger, characterized in that: It comprises a shell and a central tube for winding a spiral heat exchange tube, a plurality of liquid inlet pipes and liquid outlet pipes are arranged on the side wall of the shell, and vibration reduction devices for fixing the heat exchange tubes are arranged at the liquid inlet pipes and the liquid outlet pipes, an upper tube plate and a lower tube plate for fixing the central tube are arranged in the shell, and a shell-side liquid inlet pipe and a shell-side liquid outlet pipe are respectively arranged at the upper and lower ends of the shell.

2. The multi-stream bypass heat exchanger according to claim 1, characterized in that: The liquid inlet pipes include a plurality of first liquid inlet pipes arranged obliquely above the upper tube plate and a plurality of second liquid inlet pipes arranged horizontally below the upper tube plate.

3. The multi-stream bypass heat exchanger according to claim 2, characterized in that: The liquid outlet pipes include a plurality of inclined first liquid outlet pipes located below the lower tube plate and a plurality of horizontally arranged second liquid outlet pipes located above the lower tube plate.

4. The multi-stream bypass heat exchanger according to claim 3, characterized in that: The first liquid inlet pipe corresponds to the first liquid outlet pipe one by one and is communicated through the spiral heat exchange pipe, and the second liquid inlet pipe corresponds to the second liquid outlet pipe one by one and is communicated through the spiral heat exchange pipe.

5. The multi-stream bypass heat exchanger according to claim 4, characterized in that: Heat exchange tube sheets for fixing the spiral heat exchange tubes are provided in the first liquid inlet pipe, the first liquid outlet pipe, the second liquid inlet pipe and the second liquid outlet pipe.

6. The multi-stream bypass heat exchanger according to claim 1, characterized in that: The vibration reduction device comprises a support frame fixed to the inner wall of the shell, and the support frame is provided with a plurality of fastening rings for binding and fixing the heat exchange tubes.

7. The multi-stream bypass heat exchanger according to claim 6, characterized in that: The fastening ring is a movable fixing device capable of adjusting the ring opening.

8. The multi-stream bypass heat exchanger according to claim 1, characterized in that: The upper tube plate is provided with a first stress groove, and the lower tube plate is provided with a second stress groove.

9. The multi-stream bypass heat exchanger according to claim 1, characterized in that: The inner wall of the shell is provided with a flow spoiler.

10. The multi-stream bypass heat exchanger according to claim 9, characterized in that: The spoiler is fixedly connected to the inner wall of the shell between the upper tube plate and the lower tube plate, and the spoiler is a spiral plate.

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