Wound tube type heat exchanger

Abstract

The utility model discloses a coiled tube type heat exchanger, which belongs to the technical field of heat exchangers, and comprises a shell, two shell pass tube orifices are arranged on the shell, two ends of the shell are respectively provided with a tube plate, a plurality of tube bundles are fixedly arranged between the two tube plates, through holes communicated with the tube bundles are arranged on the tube plates, and the through holes are communicated with the tube bundles. The opposite end faces of the two tube plates are provided with tube pass tube openings respectively. A center supporting piece extending in the axial direction is arranged in the center of the shell, and the tube bundle is spirally wound around the center supporting piece. The center supporting piece comprises a plurality of straight pipes extending in the axial direction of the shell, and the two ends of each straight pipe penetrate out of the corresponding pipe plates. According to the coiled tube type heat exchanger, the straight tube is arranged in the central area of the shell, so that the internal space in the center of the shell of the coiled tube type heat exchanger is fully utilized, the heat exchange area is increased, and the heat exchange efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchanger technical field, concretely relates to a coil type heat exchanger. BACKGROUND

[0002] The coil type heat exchanger is widely used in chemical industry, petroleum, electric power, pharmacy and other industries due to its advantages of high efficiency, compact structure and easy maintenance, and it comprises a shell and a center cylinder located inside the shell, and a plurality of pipe bundles spirally wound around the center cylinder are arranged in the space between the shell and the center cylinder. The center cylinder plays a role of supporting, guiding flow and facilitating installation in the coil type heat exchanger, but it occupies part of the space of the shell, and the internal space thereof is not effectively utilized, thereby affecting the heat exchange efficiency. SUMMARY

[0003] To solve the problem that the internal space of the center cylinder of the existing coil type heat exchanger cannot be effectively utilized, the utility model provides a coil type heat exchanger.

[0004] A coil type heat exchanger comprises a shell, two shell-side pipe openings are arranged on the shell, one pipe plate is arranged at each end of the shell, a plurality of pipe bundles are fixedly arranged between the two pipe plates, through holes communicating with the pipe bundles are arranged on the pipe plates, and pipe-side pipe openings are arranged on the end faces of the two pipe plates facing away from each other.

[0005] A center support member extending in the axial direction is arranged at the center of the shell, and the pipe bundles are spirally wound around the center support member.

[0006] The center support member comprises a plurality of straight pipes extending in the axial direction of the shell, and the two ends of each straight pipe pass through the corresponding pipe plate.

[0007] Preferably, the inner diameter of the straight pipe is smaller than the inner diameter of the pipe bundle.

[0008] Preferably, one shell head is arranged at each end of the shell, and the pipe plate is arranged at the center of the shell head.

[0009] Preferably, a pipe box head is connected to the end face of each pipe plate facing away from each other, and the pipe-side pipe opening is arranged on the pipe box head.

[0010] Preferably, a spoiler is arranged inside the straight pipe.

[0011] Preferably, the spoiler is a helical twist piece extending in the axial direction of the straight pipe, and the radial wall surface of the helical twist piece is fixedly connected to the inner side wall of the straight pipe.

[0012] Preferably, the helical twist piece is inserted into the straight pipe to be tightly fixed, or the helical twist piece is welded to the straight pipe to be fixed.

[0013] Preferably, all straight pipes are located inside the center cylinder, the central axis of the center cylinder is collinear with the central axis of the shell, and the axial two ends of the center cylinder are fixedly connected with the corresponding tube sheets.

[0014] The utility model discloses beneficial effect is:

[0015] (1) the utility model discloses a straight pipe that is arranged in the central region of the shell, makes full use of the internal space of the shell center of the around pipe heat exchanger, increases the heat exchange area, improves the heat exchange efficiency.

[0016] (2) the utility model discloses the mode of increasing the path and time of fluid in the straight pipe by adding the spoiler in the straight pipe, balances the heat exchange effect of the tube bundle, and makes the overall heat exchange effect of the tube balanced.

[0017] (3) when the straight pipe is located inside the center cylinder, the thickness of the center cylinder can be thinned because the straight pipe has a reinforcing effect on the strength of the center cylinder, and the manufacturing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification provide further understanding of the present application, the illustrative embodiments thereof, and ways in which the application can be practiced.

[0019] Figure 1 The structure schematic view of the around pipe heat exchanger in the utility model embodiment 1;

[0020] Figure 2 The structure schematic view of the around pipe heat exchanger in the utility model embodiment 2;

[0021] Figure 3 The structure schematic view of the around pipe heat exchanger in the utility model embodiment 3;

[0022] Figure 4 The structure schematic view of the around pipe heat exchanger in the utility model embodiment 4;

[0023] Figure 5 The structure schematic view of the spoiler in the utility model;

[0024] Among them:

[0025] 1-shell, 101-shell pipe opening, 2-head, 3-tube sheet, 4-center cylinder, 5-tube bundle, 6-tube box head, 601-tube opening, 7-straight pipe, 8-spoiler. DETAILED DESCRIPTION

[0026] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0027] Example 1:

[0028] like Figure 1 As shown, a wound tube heat exchanger includes a shell 1, on which two shell-side tube ports 101 are provided, and a tube sheet 3 is provided at each end of the shell 1. A multi-strand tube bundle 5 is fixedly provided between the two tube sheets 3. The tube sheet 3 is provided with through holes communicating with the tube bundle 5. Tube-side tube ports 601 are provided on the opposite end faces of the two tube sheets 3.

[0029] A central support member extending axially is provided at the center of the housing 1, and the tube bundle 5 is spirally wound around the central support member.

[0030] The central support includes several straight tubes 7 extending along the axial direction of the shell 1, with the two ends of the straight tubes 7 passing through corresponding tube plates 3.

[0031] Preferably, the inner diameter of the straight tube 7 is smaller than the inner diameter of the tube bundle 5. Since the straight tube 7 is shorter than the spirally wound tube bundle 5, in order to ensure that the heat exchange effect of the straight tube 7 is equal to that of the tube bundle 5, it is easy to use a small-diameter straight tube to increase the pressure drop and reduce the flow velocity, so that the heat exchange effect of the straight tube 7 and the wound tube bundle 5 can reach a balanced state and the overall heat exchange effect of the tube side is balanced.

[0032] Preferably, a shell end cap 2 is provided at each end of the shell 1, and the tube sheet 3 is located at the center of the shell end cap 2.

[0033] Preferably, tube box heads 6 are connected to the opposite end faces of the two tube sheets 3 respectively, and the tube port 601 is provided on the tube box head 6.

[0034] In Example 1, the central support member composed of several straight tubes 7 satisfies the requirements for the tube bundle 5 to be supported around the tubes. On the other hand, the straight tubes 7 and the tube bundle 5 together form the tube pass, making full use of the internal space at the center of the shell 1 in the wound tube heat exchanger, increasing the heat exchange area and improving the heat exchange efficiency.

[0035] Example 2:

[0036] Based on Example 1, such as Figure 2 As shown, a flow deflector 8 is installed inside the straight pipe 7.

[0037] Preferred, such as Figure 5 As shown, the spoiler 8 is a spiral twisted plate extending along the axial direction of the straight pipe 7, and the radial wall of the spiral twisted plate is fixedly connected to the inner wall of the straight pipe 7.

[0038] Preferably, the spiral twisted plate is inserted into the straight tube 7 to achieve tight fixation, or the spiral twisted plate is welded to the straight tube 7 for fixation.

[0039] The helical twisted sheet is made by helical twisting a plate-shaped sheet around its central axis.

[0040] In the embodiment 2, the path and time of fluid in the straight tube 7 are increased by adding the flow disturbers 8 in the straight tube 7, so as to balance the heat exchange effect of the tube bundle 5 and make the overall heat exchange effect of the tube side balanced.

[0041] Embodiment 3:

[0042] On the basis of the embodiment 1, as shown in the figure, Figure 3 All the straight tubes 7 are located inside the central cylinder 4, the central axis of the central cylinder 4 is collinear with the central axis of the shell 1, and the axial ends of the central cylinder 4 are fixedly connected with the corresponding tube plates 3.

[0043] In the embodiment 3, the around-tube supporting effect on the tube bundle 5 is realized by the central cylinder 4, the internal space of the around-tube heat exchanger central cylinder 4 is fully utilized by the straight tubes 7 inside the central cylinder 4, the heat exchange area is increased, and the heat exchange efficiency is improved.

[0044] Embodiment 4:

[0045] On the basis of the embodiment 3, as shown in the figure, Figure 4 The inside of the straight tube 7 is provided with the flow disturbers 8.

[0046] Preferably, as shown in the figure, Figure 5 The helical twisted sheet is made by helical twisting a plate-shaped sheet around its central axis.

[0047] Preferably, the helical twisted sheet is inserted into the straight tube 7 to realize the clamping fixation or the helical twisted sheet is fixedly connected with the straight tube 7 by welding.

[0048] The helical twisted sheet is made by helical twisting a plate-shaped sheet around its central axis.

[0049] In the embodiment 4, the path and time of fluid in the straight tube 7 are increased by adding the flow disturbers 8 in the straight tube 7, so as to balance the heat exchange effect of the tube bundle 5 and make the overall heat exchange effect of the tube side balanced.

[0050] The above describes the specific embodiments of the utility model with reference to the accompanying drawings, but is not a limitation of the utility model, and those skilled in the art should understand that various modifications or changes made by those skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A spiral wound heat exchanger comprising a shell (1), characterised in that, Two shell side pipe orifices (101) are arranged on the shell (1), and one tube sheet (3) is arranged at each end of the shell (1), a plurality of tube bundles (5) are fixedly arranged between the two tube sheets (3), the tube sheet (3) is provided with a through hole communicating with the tube bundle (5), and a tube side pipe orifice (601) is arranged on the end face of each tube sheet (3) away from each other. A central support member extending in the axial direction is arranged at the center of the shell (1), and the tube bundle (5) is spirally wound around the central support member. The central support member comprises a plurality of straight pipes (7) extending in the axial direction of the shell (1), and the two ends of the straight pipe (7) pass through the corresponding tube sheet (3).

2. The pipe-in-pipe heat exchanger of claim 1, wherein, The inner diameter of the straight pipe (7) is smaller than the inner diameter of the tube bundle (5).

3. The pipe-in-pipe heat exchanger of claim 1, wherein, One shell head (2) is arranged at each end of the shell (1), and the tube sheet (3) is arranged at the center of the shell head (2).

4. The pipe-in-pipe heat exchanger of claim 1, wherein, The tube box head (6) is connected to the end face of each tube sheet (3) away from each other, and the tube side pipe orifice (601) is arranged on the tube box head (6).

5. The pipe-in-pipe heat exchanger of claim 1, wherein, A spoiler (8) is arranged inside the straight pipe (7).

6. The pipe-in-pipe heat exchanger of claim 5, wherein, The spoiler (8) is a spiral twisted sheet extending in the axial direction of the straight pipe (7), and the radial wall surface of the spiral twisted sheet is fixedly connected to the inner wall of the straight pipe (7).

7. The pipe-in-pipe heat exchanger of claim 6, wherein, The spiral twisted sheet is inserted into the straight pipe (7) to realize plug-in fixation, or the spiral twisted sheet is welded to the straight pipe (7) to realize fixation.

8. A coil heat exchanger according to any one of claims 1 to 7, wherein All straight pipes (7) are located inside the central cylinder (4), the central axis of the central cylinder (4) is collinear with the central axis of the shell (1), and the axial ends of the central cylinder (4) are fixedly connected to the corresponding tube sheet (3).

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