Constant-speed heat exchanger

Abstract

The utility model relates to a constant-speed heat exchanger and belongs to the field of heat exchangers. Comprising tube boxes, a shell, tube plates, baffle plates and heat exchange tubes, the tube boxes are arranged at the two ends of the shell, the baffle plates and the heat exchange tubes are all arranged in the shell, the heat exchange tubes are evenly distributed in the shell through the tube plates, constant-speed rollers are axially arranged in the heat exchange tubes, positioning hexsteel is arranged at the two ends of each constant-speed roller, and the constant-speed rollers are fixed through the positioning hexsteel. And the positioning hexsteel is connected with the tube plate through a connecting assembly. The utility model stabilizes the flow velocity of the medium in the heat exchange tube, prevents the equipment from being damaged, and ensures the safe operation of the whole set of chemical equipment.

Description

Technical Field

[0001] The utility model relates to a constant speed heat exchanger, belonging to the field of heat exchangers. Background Art

[0002] The shell-and-tube heat exchanger is the most widely used heat exchanger in chemical production. During heat exchange, one fluid enters from the connecting pipe of the tube box, flows in the tube, and flows out from the outlet pipe at the other end of the tube box, which is called the tube side; the other fluid enters from the connecting pipe of the shell and flows out from another connecting pipe on the shell, which is called the shell side. The two media are separated by the heat exchange tube and heat exchange is carried out through the wall of the heat exchange tube. Therefore, the shell-and-tube heat exchanger bears a certain heat load in the chemical production. Heat transfer.

[0003] Some chemical products are affected by the market, and the demand for the products fluctuates greatly. When the demand for the products is small, chemical production does not need to run at full capacity, and the medium flow rate of the shell-and-tube heat exchanger in the device will decrease accordingly. The flow rate of the medium in the equipment will decrease in proportion to the flow rate reduction, and the shell-and-tube heat exchanger in some special locations will be damaged. For example, the tail gas heater of the sulfur recovery device uses the flue gas in the tube to heat the tail gas outside the tube. After the flue gas flow rate in the tube is reduced, the flue gas will transfer heat in the heat exchange tube for too long, and eventually the flue gas temperature will drop too much, causing the sulfide contained in the flue gas to condense and gather in the rear section of the heat exchange tube, thus causing the heat exchange tube to corrode and leak. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, to provide a constant speed heat exchanger, to stabilize the flow rate of the medium in the heat exchange tube, to prevent equipment damage, and to ensure the safe operation of the entire chemical plant.

[0005] The utility model describes a constant speed heat exchanger comprising a tube box, a shell, a tube sheet, a baffle and a heat exchange tube. The tube box is placed at both ends of the shell, the baffle and the heat exchange tube are placed in the shell, the heat exchange tube is evenly distributed in the shell through the tube sheet, a constant speed stick is axially arranged in the heat exchange tube, positioning tortoise shell nets are arranged at both ends of the constant speed stick, the constant speed stick is fixed by the positioning tortoise shell net, and the positioning tortoise shell net is connected to the tube sheet through a connecting component.

[0006] By adjusting the diameter of the constant speed stick, the gap between the heat exchange tube and the constant speed stick is changed, and the flow area of ​​the tube-side medium in the heat exchange tube is changed. When the flow rate of the tube-side medium is reduced by a certain percentage, the flow area of ​​the tube-side medium in the heat exchange tube is reduced accordingly, which can ensure that the flow rate of the tube-side medium in the heat exchange tube is constant.

[0007] The positioning tortoise shell net includes several steel rings, two adjacent steel rings are connected by steel bars, and both ends of the constant speed stick are respectively inserted into the steel rings for setting. Both ends of the constant speed stick are respectively inserted into the steel rings for positioning, so that the constant speed stick is placed in the middle of the heat exchange tube, and the steel rings are rigidly connected by the steel bars to ensure that the positioning tortoise shell net will not be deformed.

[0008] The steel ring and the steel bar are connected by welding.

[0009] The connecting assembly includes a positioning screw and a nut. The tail end of the positioning screw passes through the steel ring in the positioning tortoise shell net. The tail end of the positioning screw is fastened to the steel ring through a nut. A connecting hole is set on the tube plate corresponding to the steel ring. The head end of the positioning screw is inserted into the connecting hole and connected to the tube plate.

[0010] The connection hole is a threaded hole, and the positioning screw is connected to the threaded hole on the tube sheet by threads. During installation, the positioning screw is screwed into the threaded hole on the tube sheet, and then the other end of the positioning screw is tightened with the positioning tortoise shell net through a nut, thereby improving the reliability of the connection between the positioning screw and the tube sheet.

[0011] The positioning tube is set on the outer periphery of the positioning screw rod, and the positioning tube is placed between the positioning tortoise shell net and the tube plate. The positioning tube quantitatively locates the distance between the positioning tortoise shell net and the tube plate. The length of the positioning tube is determined according to actual needs, and the positioning tube is placed between the positioning tortoise shell net and the tube plate, thereby ensuring that the distance between the positioning tortoise shell net and the tube plate is consistent.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The utility model arranges a constant speed stick axially in the heat exchange tube, and adjusts the diameter of the constant speed stick to change the gap between the heat exchange tube and the constant speed stick, thereby changing the flow area of ​​the tube-side medium in the heat exchange tube. When the flow rate of the tube-side medium is reduced by a certain percentage, the flow area of ​​the tube-side medium in the heat exchange tube is reduced accordingly, which can ensure that the flow rate of the tube-side medium in the heat exchange tube is constant, thereby preventing equipment damage and ensuring the safe operation of the entire chemical plant.

[0014] (2) The positioning tortoise shell net includes several steel rings, and two adjacent steel rings are connected by steel bars. The two ends of the constant speed stick are respectively inserted into the steel rings for setting. The two ends of the constant speed stick are respectively inserted into the steel rings for positioning, so that the constant speed stick is placed in the middle of the heat exchange tube. The steel rings are rigidly connected by the steel bars to ensure that the positioning tortoise shell net will not be deformed.

[0015] (3) A positioning tube is set around the outer periphery of the positioning screw rod, and the positioning tube is placed between the positioning tortoise shell mesh and the tube sheet. The positioning tube quantitatively locates the distance between the positioning tortoise shell mesh and the tube sheet. The length of the positioning tube is determined according to actual needs, and the positioning tube is placed between the positioning tortoise shell mesh and the tube sheet to ensure that the distance between the positioning tortoise shell mesh and the tube sheet is consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of the present utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0018] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure along the BB direction;

[0019] Figure 4 It is a schematic diagram of the main structure of the positioning tortoise shell net.

[0020] In the figure: 1. pipe box; 2. nut; 3. positioning screw; 4. positioning tube; 5. positioning tortoise shell net; 51. steel ring; 52. steel bar; 6. constant speed rod; 7. tube sheet; 8. shell; 9. heat exchange tube; 10. baffle. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with embodiments:

[0022] Example 1

[0023] like Figure 1 to Figure 4 As shown, a constant speed heat exchanger described in the utility model includes a tube box 1, a shell 8, a tube sheet 7, a baffle 10 and a heat exchange tube 9, the tube box 1 is placed at both ends of the shell 8, the tube sheet 7, the baffle 10 and the heat exchange tube 9 are all placed in the shell 8, the heat exchange tube 9 is evenly distributed in the shell 8 through the tube sheet 7, a constant speed rod 6 is axially arranged in the heat exchange tube 9, the diameter of the constant speed rod 6 can be adjusted according to production needs, positioning tortoise shell nets 5 are arranged at both ends of the constant speed rod 6, the constant speed rod 6 is fixed by the positioning tortoise shell net 5, and the positioning tortoise shell net 5 is connected to the tube sheet 7 through a connecting component.

[0024] The positioning tortoise shell net 5 includes a plurality of steel rings 51, and two adjacent steel rings 51 are connected by steel bars 52, and both ends of the constant speed rod 6 are respectively inserted into the steel rings 51 for setting. Both ends of the constant speed rod 6 are respectively inserted into the steel rings 51 for positioning, so that the constant speed rod 6 is placed in the middle of the heat exchange tube 9, and the steel rings 51 are rigidly connected by the steel bars 52 to ensure that the positioning tortoise shell net 5 will not be deformed.

[0025] The steel ring 51 and the steel bar 52 are connected by welding.

[0026] The connecting assembly includes a positioning screw rod 3 and a nut 2. The tail end of the positioning screw rod 3 passes through the steel ring 51 in the positioning tortoise shell net 5. The tail end of the positioning screw rod 3 is fastened to the steel ring 51 through the nut 2. A connecting hole is set on the tube sheet 7 corresponding to the steel ring 51. The head end of the positioning screw rod 3 is inserted into the connecting hole and connected to the tube sheet 7.

[0027] The connection hole is a threaded hole, and the positioning screw rod 3 is connected to the threaded hole on the tube sheet 7 by threads. During installation, the positioning screw rod 3 is screwed into the threaded hole on the tube sheet 7, and then the other end of the positioning screw rod 3 is tightened with the positioning tortoise shell net 5 through the nut 2, thereby improving the reliability of the connection between the positioning screw rod 3 and the tube sheet 7.

[0028] The positioning tube 4 is sleeved on the outer periphery of the positioning screw rod 3, and the positioning tube 4 is placed between the positioning tortoise shell net 5 and the tube sheet 7. The positioning tube 4 quantitatively positions the distance between the positioning tortoise shell net 5 and the tube sheet 7. The length of the positioning tube 4 is determined according to actual needs, and the positioning tube 4 is placed between the positioning tortoise shell net 5 and the tube sheet 7, thereby ensuring that the distance between the positioning tortoise shell net 5 and the tube sheet 7 is consistent.

[0029] Working process: When installing the positioning tortoise shell net 5, first screw the positioning screw 3 into the corresponding threaded hole on the tube plate 7, then insert the positioning tube 4 into the outer periphery of the positioning screw 3, and then insert the positioning tortoise shell net 5 into the positioning screw 3 and the constant speed rod 6, and finally use the nut 2 to lock the positioning screw 3 and the positioning tortoise shell net 5, and the constant speed rod 6 is installed inside the heat exchange tube 9. According to the production situation, the constant speed rod 6 of the appropriate diameter is selected to change the gap between the heat exchange tube 9 and the constant speed rod 6, thereby changing the flow area of ​​the tube side medium in the heat exchange tube 9. When the flow rate of the tube side medium is reduced by a certain proportion, the flow area of ​​the tube side medium in the heat exchange tube 9 is reduced accordingly, which can ensure that the flow rate of the tube side medium in the heat exchange tube 9 is constant.

[0030] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A constant speed heat exchanger, comprising a tube box (1), a shell (8), a tube sheet (7), a baffle (10) and a heat exchange tube (9), wherein the tube box (1) is placed at both ends of the shell (8), the baffle (10) and the heat exchange tube (9) are both placed in the shell (8), and the heat exchange tube (9) is evenly distributed in the shell (8) through the tube sheet (7), characterized in that: A constant speed rod (6) is axially arranged inside the heat exchange tube (9), positioning tortoise shell nets (5) are arranged at both ends of the constant speed rod (6), the constant speed rod (6) is fixed by the positioning tortoise shell nets (5), and the positioning tortoise shell nets (5) are connected to the tube sheet (7) through a connecting component.

2. The constant speed heat exchanger according to claim 1, characterized in that: The positioning tortoise shell net (5) comprises a plurality of steel rings (51), two adjacent steel rings (51) are connected by steel bars (52), and both ends of the constant speed rod (6) are respectively inserted into the steel rings (51).

3. The constant speed heat exchanger according to claim 1, characterized in that: The steel ring (51) and the steel bar (52) are connected by welding.

4. The constant speed heat exchanger according to claim 2 or 3, characterized in that: The connection assembly comprises a positioning screw rod (3) and a nut (2); the tail end of the positioning screw rod (3) passes through a steel ring (51) in the positioning tortoise shell net (5); the tail end of the positioning screw rod (3) is fastened to the steel ring (51) via the nut (2); a connection hole is provided on the tube sheet (7) corresponding to the steel ring (51); the head end of the positioning screw rod (3) is inserted into the connection hole to be connected to the tube sheet (7).

5. The constant speed heat exchanger according to claim 4, characterized in that: The connection hole is a threaded hole, and the positioning screw rod (3) is connected to the threaded hole on the tube plate (7) through threads.

6. The constant speed heat exchanger according to claim 5, characterized in that: A positioning tube (4) is sleeved on the outer periphery of the positioning screw rod (3), and the positioning tube (4) is placed between the positioning tortoise shell net (5) and the tube plate (7).

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