Bayonet heat exchanger

Abstract

The utility model relates to the field of heat exchanger discloses a bayonet heat exchanger, including the casing, the casing front end connects first head, rear end connects second head, the casing inside is sequentially provided with first tube pass tube plate, second tube pass tube plate and third shell pass tube plate, fourth shell pass tube plate, the casing top is provided with the tube pass inlet before first tube pass tube plate, the casing below is provided with the tube pass outlet between first tube pass tube plate with second tube pass tube plate, the casing top is provided with the shell pass inlet between second tube pass tube plate with third shell pass tube plate, the casing below is provided with the shell pass outlet after fourth shell pass tube plate, the bayonet heat exchanger that the utility model puts forward, through the pipe bayonet formula structure in the outer pipe cover, has increased medium flow distance, and further increased the inside and outside medium contact time and area, effectively improved the heat exchange efficiency of heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of heat exchangers, specifically to a bayonet-type heat exchanger. Background Technology

[0002] A heat exchanger is an energy-saving device that enables heat transfer between two or more fluids at different temperatures. It allows heat to be transferred from a higher-temperature fluid to a lower-temperature fluid, bringing the fluid temperature to the specified parameters of the process to meet the requirements of the process conditions. It is also a key device for improving energy efficiency.

[0003] Existing heat exchangers suffer from problems such as high flow rate and low heat exchange efficiency due to the small contact area between the shell and tube sides. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a bayonet-type heat exchanger. By using a bayonet-like structure with an outer tube surrounding an inner tube, the flow distance of the medium is increased, thereby solving the problems of small contact area and high flow velocity of the medium in the shell and tube sides, and improving the heat exchange efficiency of the heat exchanger.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bayonet-type heat exchanger, comprising a shell, wherein a first end cap is connected to the front end of the shell and a second end cap is connected to the rear end of the shell; a first tube-side tube sheet, a second tube-side tube sheet, a third shell-side tube sheet, and a fourth shell-side tube sheet are sequentially arranged inside the shell; a tube-side inlet is provided above the shell in front of the first tube-side tube sheet, and a tube-side outlet is provided below the shell between the first tube-side tube sheet and the second tube-side tube sheet; a shell-side inlet is provided above the shell between the second tube-side tube sheet and the third shell-side tube sheet, and a shell-side outlet is provided below the shell after the fourth shell-side tube sheet; The first tube sheet has several bayonet-type inner tubes in the middle, and the second tube sheet has several sheath-type outer tubes in the middle. The corresponding bayonet-type inner tubes are inserted into the sheath-type outer tubes. All the bayonet-type inner tubes and sheath-type outer tubes together with the tube inlet and tube outlet form a tube medium flow channel. The tube medium enters from the tube inlet and flows out from the tube outlet through the bayonet-type inner tubes and sheath-type outer tubes. Several shell-side medium flow tubes are provided between the third shell-side tube sheet and the fourth shell-side tube sheet. Corresponding sheath-type outer tubes are inserted into the shell-side medium flow tubes. All shell-side medium flow tubes, together with the shell-side inlet and shell-side outlet, form a shell-side medium flow channel. The shell-side medium enters from the shell-side inlet, flows through the shell-side medium flow tubes, and exits from the shell-side outlet.

[0006] As a further technical solution, the bayonet-type inner tube is inserted into the tail of the sheath-type outer tube, but does not contact the rear end plate of the sheath-type outer tube.

[0007] As a further technical solution, the sheath-type outer tube is inserted into the shell-side medium flow tube until it reaches the plane where the fourth shell-side tube sheet is located.

[0008] As a further technical solution, the shell, the first tube sheet, the second tube sheet, the third shell sheet, and the fourth shell sheet are made of stainless steel to enhance high temperature resistance and corrosion resistance.

[0009] As a further technical solution, the bayonet-shaped inner tube is made of seamless steel pipe with an outer diameter of 19 mm and a wall thickness of 2 mm.

[0010] As a further technical solution, the sheath-type outer tube is made of seamless steel pipe with an outer diameter of 32 mm and a wall thickness of 3 mm.

[0011] As a further technical solution, the shell-side medium flow tube is made of seamless steel pipe with an outer diameter of 50 mm and a wall thickness of 3 mm.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The bayonet-type heat exchanger proposed in this utility model increases the medium flow distance through the bayonet-like structure inside the outer tube sleeve, thereby increasing the contact time and area between the inner and outer media and effectively improving the heat exchange efficiency of the heat exchanger. Attached Figure Description

[0013] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of the bayonet-type heat exchanger provided in an embodiment of the present invention.

[0015] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle.

[0016] In the figure, 1-shell, 2-first end cap, 3-second end cap, 4-tube-side inlet, 5-tube-side outlet, 6-shell-side inlet, 7-shell-side outlet, 8-first tube sheet, 9-second tube sheet, 10-third shell-side tube sheet, 11-fourth shell-side tube sheet, 12-bayonet-type inner tube, 13-sheath-type outer tube, 131-rear end plate, 14-shell-side medium flow tube. Detailed Implementation

[0017] 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.

[0018] Example: Reference Figure 1-2 The illustrated bayonet-type heat exchanger includes a shell 1, with a first end cap 2 connected to the front end and a second end cap 3 connected to the rear end. A first tube sheet 8, a second tube sheet 9, a third shell sheet 10, and a fourth shell sheet 11 are sequentially arranged inside the shell 1. A tube inlet 4 is located above the shell 1 before the first tube sheet 8, and a tube outlet 5 is located below the shell 1 between the first and second tube sheets 8 and 9. A shell inlet 6 is located above the shell 1 between the second and third shell sheets 9, and a shell outlet 7 is located below the shell 1 after the fourth shell sheet 11.

[0019] The first tube sheet 8 has several bayonet-type inner tubes 12 in its middle section, and the second tube sheet 9 has several sheath-type outer tubes 13 in its middle section. The corresponding bayonet-type inner tubes 12 are inserted into the sheath-type outer tubes 13. All the bayonet-type inner tubes 12 and sheath-type outer tubes 13, together with the tube inlet 4 and the tube outlet 5, form a tube-side medium flow channel. The tube-side medium enters from the tube inlet 4 and flows out from the tube outlet 5 through the bayonet-type inner tubes 12 and the sheath-type outer tubes 13.

[0020] Several shell-side medium flow tubes 14 are provided between the third shell-side tube sheet 10 and the fourth shell-side tube sheet 11. Corresponding sheath-type outer tubes 13 are inserted into the shell-side medium flow tubes 14. All shell-side medium flow tubes 14, together with the shell-side inlet 6 and the shell-side outlet 7, form a shell-side medium flow channel. The shell-side medium enters from the shell-side inlet 6, flows through the shell-side medium flow tubes 14, and exits from the shell-side outlet 7.

[0021] Preferred, such as Figure 2 As shown, the bayonet-type inner tube 12 is inserted into the tail of the sheath-type outer tube 13, but does not contact the rear end plate 131 of the sheath-type outer tube 13; the sheath-type outer tube 13 is inserted into the shell-side medium flow tube 14 until it reaches the plane where the fourth shell-side tube sheet 11 is located.

[0022] Furthermore, the shell 1, the first tube sheet 8, the second tube sheet 9, the third shell sheet 10, and the fourth shell sheet 11 are made of S30408 ​​stainless steel.

[0023] Furthermore, the bayonet-shaped inner tube 12 is made of seamless steel pipe with an outer diameter of 19 mm and a wall thickness of 2 mm.

[0024] Furthermore, the sheath-type outer tube 13 is made of seamless steel tube with an outer diameter of 32 mm and a wall thickness of 3 mm.

[0025] Furthermore, the shell-side medium flow tube 14 is made of seamless steel pipe with an outer diameter of 50 mm and a wall thickness of 3 mm.

[0026] 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 bayonet-type heat exchanger, comprising a shell (1), characterized in that: The front end of the shell (1) is connected to the first end cap (2) and the rear end is connected to the second end cap (3); the shell (1) is provided with a first tube sheet (8), a second tube sheet (9), a third shell sheet (10), and a fourth shell sheet (11) in sequence; a tube inlet (4) is provided above the shell (1) in front of the first tube sheet (8), and a tube outlet (5) is provided below the shell (1) between the first tube sheet (8) and the second tube sheet (9); a shell inlet (6) is provided above the shell (1) between the second tube sheet (9) and the third shell sheet (10), and a shell outlet (7) is provided below the shell (1) after the fourth shell sheet (11); The first tube sheet (8) is provided with several bayonet-type inner tubes (12) in the middle, and the second tube sheet (9) is provided with several sheath-type outer tubes (13) in the middle. The corresponding bayonet-type inner tubes (12) are inserted into the sheath-type outer tubes (13). All bayonet-type inner tubes (12) and sheath-type outer tubes (13) together with the tube inlet (4) and tube outlet (5) form a tube medium flow channel. Several shell-side medium flow pipes (14) are provided between the third shell-side tube sheet (10) and the fourth shell-side tube sheet (11). The corresponding sheath-type outer tube (13) is inserted into the shell-side medium flow pipe (14). All shell-side medium flow pipes (14), together with the shell-side inlet (6) and the shell-side outlet (7), form a shell-side medium flow channel.

2. The bayonet-type heat exchanger according to claim 1, characterized in that: The bayonet-type inner tube (12) is inserted into the tail of the sheath-type outer tube (13) and does not contact the rear end plate (131) of the sheath-type outer tube (13).

3. The bayonet-type heat exchanger according to claim 1 or 2, characterized in that: The sheath-type outer tube (13) is inserted into the shell-side medium flow tube (14) until it reaches the plane where the fourth shell-side tube sheet (11) is located.

4. The bayonet-type heat exchanger according to claim 1, characterized in that: The shell (1), the first tube sheet (8), the second tube sheet (9), the third shell sheet (10), and the fourth shell sheet (11) are made of stainless steel.

5. The bayonet-type heat exchanger according to claim 2, characterized in that: The bayonet-shaped inner tube (12) is made of seamless steel pipe with an outer diameter of 19 mm and a wall thickness of 2 mm.

6. The bayonet-type heat exchanger according to claim 5, characterized in that: The sheath-type outer tube (13) is made of seamless steel pipe with an outer diameter of 32 mm and a wall thickness of 3 mm.

7. The bayonet-type heat exchanger according to claim 3, characterized in that: The shell-side medium flow tube (14) is made of seamless steel pipe with an outer diameter of 50 mm and a wall thickness of 3 mm.

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