Flow dividing device of heat exchanger

Abstract

The utility model provides a heat exchanger shunting device which solves the problems that a small-diameter radiating pipe is prone to scaling in the using process, the flow speed of fluid is affected, the heat exchange efficiency is reduced, frequent shutdown for cleaning and maintenance is needed, and equipment operation is affected. The double-flow-path reverse flow path is arranged to form two-time cross heat exchange with shell pass fluid, the heat exchange efficiency can be improved, the two flow channels are independent of each other, starting and stopping of the two flow channels can be freely adjusted according to the temperature requirement, energy is saved, meanwhile, single-side mechanical cleaning is allowed under the condition that operation is not stopped, and the heat exchange efficiency is improved. And the other side is maintained to operate, so that the downtime is reduced, the problem of scaling can be solved on the premise of not changing the pipe diameter and energy consumption, and meanwhile, the operation of equipment is not influenced.

Description

A heat exchanger flow splitting device Technical Field

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

[0002] There are many types of heat exchangers, among which shell-and-tube heat exchangers are commonly used equipment in industries such as petroleum, chemical, nuclear power, special boiler systems, light industry, and food processing. Shell-and-tube heat exchangers mainly consist of a shell, tube bundle, tube sheet, baffles, and end caps. The shell is generally circular, and the tube bundle has anywhere from a few hundred to over a thousand tubes. The ends of the tube bundle are fixed to the tube sheet, and the bundle passes through small holes in multiple baffles.

[0003] Existing heat exchangers typically use multiple small-diameter heat exchange tube bundles for heat exchange. Although small-diameter heat exchange tube bundles have high heat exchange efficiency, they are prone to scaling during use, which affects fluid flow rate, reduces heat exchange efficiency, and requires frequent shutdowns for cleaning and maintenance, thus affecting equipment operation. Summary of the Invention

[0004] To address the problem in the background technology that small-diameter heat exchange tubes are prone to scaling during use, which affects fluid flow rate, reduces heat exchange efficiency, requires frequent shutdowns for cleaning and maintenance, and affects equipment operation, this utility model proposes a heat exchanger flow divider device.

[0005] The technical solution of this utility model is: a heat exchanger diversion device, including a shell, a support fixedly provided at the bottom of the shell, a shell-side water inlet pipe fixedly connected and connected to the bottom left end of the shell, a shell-side water outlet pipe fixedly connected and connected to the bottom right end of the shell, and pipe boxes flanged to both the left and right ends of the shell, a first-side water inlet pipe fixedly connected and connected to the top of the left-side pipe box, a first-side water outlet pipe fixedly connected and connected to the bottom of the left-side pipe box, a second-side water inlet pipe fixedly connected and connected to the top of the right-side pipe box, and a second-side water outlet pipe fixedly connected and connected to the bottom of the right-side pipe box.

[0006] Both ends of the shell are flanged and connected to tube boxes. A fixed tube sheet is fixed between the shell and the tube boxes. The front half of the fixed tube sheet on the left is fixed with multiple heat exchange tubes extending to the right, and the rear half of the fixed tube sheet on the right is fixed with multiple heat exchange tubes extending to the left. The inlet and outlet of the heat exchange tubes are connected to the inside of the tube box. A baffle is fixed inside the tube box and arranged horizontally along its radial direction. The inlet of the heat exchange tube is located above the baffle, and the outlet of the heat exchange tube is located below the baffle.

[0007] Preferably, a sealing plate is detachably fixed to the end of the pipe box away from the shell by bolts.

[0008] Preferably, the end of the first-pass water inlet pipe furthest from the pipe box and the end of the second-pass water inlet pipe furthest from the pipe box are fixedly connected to a main water inlet pipe, and ball valves are fixedly installed on both the first-pass water inlet pipe and the second-pass water inlet pipe.

[0009] Preferably, the inner diameter of the main inlet pipe is larger than that of the first and second inlet pipes.

[0010] Preferably, a plurality of baffles are fixedly arranged at left and right intervals inside the shell. One end of the baffle is left with a notch between it and the inner wall of the shell to allow the shell fluid to pass through. The notches of two adjacent baffles are staggered vertically.

[0011] Advantages of this invention: By setting up a dual-flow counter-current path, this invention forms two cross-heat exchanges with the shell-side fluid, which can improve heat exchange efficiency. Moreover, the two flow channels are independent of each other, and the start and stop of the two flow channels can be freely adjusted according to temperature requirements, saving energy. At the same time, it allows mechanical cleaning on one side while maintaining operation on the other side without stopping operation, reducing downtime. This allows the scaling problem to be solved without changing the pipe diameter and energy consumption, and without affecting the operation of the equipment. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 is a cross-sectional view of the shell in Figure 1 of this utility model;

[0015] Figure 3 is a top sectional view of the shell in Figure 1 of this utility model;

[0016] Figure 4 is a side view of the pipe box in Figure 1 of this utility model.

[0017] In the diagram: 1. Shell; 11. Shell-side inlet pipe; 12. Shell-side outlet pipe; 2. Tube box; 21. First-side inlet pipe; 22. First-side outlet pipe; 23. Second-side inlet pipe; 24. Second-side outlet pipe; 3. Fixed tube sheet; 4. Heat exchange tubes; 5. Baffle plate; 6. Sealing plate; 7. Main inlet pipe; 8. Ball valve; 9. Baffle plate; 10. Support. Detailed Implementation

[0018] 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.

[0019] Example 1: A heat exchanger diversion device, as shown in Figures 1-4, includes a shell 1, a support 10 fixedly mounted on the bottom of the shell 1, the shell 1 is a pipe structure extending in the left and right direction, the bottom left end of the shell 1 is fixedly connected to and connected to a shell-side water inlet pipe 11, and the right end of the shell 1 is fixedly connected to and connected to a shell-side water outlet pipe 12; both the left and right ends of the shell 1 are flanged to pipe boxes 2, the top of the left-side pipe box 2 is fixedly connected to and connected to a first-side water inlet pipe 21, the bottom of the left-side pipe box 2 is fixedly connected to and connected to a first-side water outlet pipe 22, the top of the right-side pipe box 2 is fixedly connected to and connected to a second-side water inlet pipe 23, and the bottom of the right-side pipe box 2 is fixedly connected to and connected to a second-side water outlet pipe 24.

[0020] Both ends of the shell 1 are flanged and connected to tube boxes 2. A fixed tube sheet 3 is fixed between the shell 1 and the tube box 2. Specifically, the fixed tube sheet 3 is a circular plate structure with flange holes on its edge, so that when the shell 1 and the tube box 2 are connected by flanges, the fixed tube sheet 3 can be connected and fixed simultaneously. The two fixed tube sheets 3 are used to seal the left and right ends of the tube box 2. The front half of the fixed tube sheet 3 on the left side is fixed with multiple heat exchange tubes 4 extending to the right, and the rear half of the fixed tube sheet 3 on the right side is fixed with multiple heat exchange tubes 4 extending to the left. The heat exchange tubes 4 are U-shaped tubes, and both ends of the heat exchange tubes 4 are fixedly inserted into the fixed tube sheet 3. The inlet and outlet of the heat exchange tubes 4 are connected to the tube box 2. The internal structure is interconnected; a partition 5 is fixedly installed inside the tube box 2, arranged horizontally along its radial direction. The inlet of the heat exchange tube 4 is located above the partition 5, and the outlet of the heat exchange tube 4 is located below the partition 5. This allows the tube-side fluid entering the upper part of the tube box 2 from the first tube-side inlet pipe 21 to enter through the inlet of the heat exchange tube 4 under the action of the partition 5. After exchanging heat with the shell-side fluid in the shell 1, the fluid returns to the lower part of the tube box 2 and is discharged from the first tube-side outlet pipe 22. Similarly, the tube-side fluid entering the upper part of the tube box 2 from the second tube-side inlet pipe 23 to enter through the inlet of the heat exchange tube 4 under the action of the partition 5. After exchanging heat with the shell-side fluid in the shell 1, the fluid returns to the lower part of the tube box 2 and is discharged from the second tube-side outlet pipe 24.

[0021] The multiple heat exchange tubes 4 located in the front half of the left fixed tube sheet 3 and the multiple heat exchange tubes 4 located in the rear half of the right fixed tube sheet 3 have opposite flow directions in the tube side and are staggered to form a double-flow counter-current path. This creates two cross-heat exchange with the shell side fluid, which can improve heat exchange efficiency. Moreover, the two flow channels are independent of each other and can be freely adjusted to start and stop according to temperature requirements, saving energy. At the same time, it allows mechanical cleaning on one side without stopping operation, while the other side continues to operate, reducing downtime. This allows the scaling problem to be solved without changing the tube diameter and energy consumption, and without affecting the operation of the equipment.

[0022] A sealing plate 6 is detachably fixed to the end of the tube box 2 away from the shell 1 by bolts. By removing the sealing plate 6, it is convenient to clean the heat exchange tubes 4 located on the fixed tube sheet 3 through the tube box 2.

[0023] The end of the first-pass water inlet pipe 21 away from the pipe box 2 and the end of the second-pass water inlet pipe 23 away from the pipe box 2 are fixedly connected to a main water inlet pipe 7. The inner diameter of the main water inlet pipe 7 is larger than that of the first-pass water inlet pipe 21 and the second-pass water inlet pipe 23 to avoid insufficient flow when the two process channels are used at the same time. Ball valves 8 are fixedly installed on both the first-pass water inlet pipe 21 and the second-pass water inlet pipe 23. The start and stop of the two process channels can be easily controlled by the ball valves 8 to facilitate shutdown cleaning.

[0024] Multiple baffles 9 are fixedly arranged at left and right intervals inside the shell 1. One end of the baffle 9 is left with a gap between it and the inner wall of the shell 1 to allow the shell-side fluid to pass through. The gaps of two adjacent baffles 9 are staggered vertically so that the flow path inside the shell 1 is a curve that goes up and down in the left and right direction, thereby increasing the flow path of the shell-side fluid and improving the heat exchange efficiency.

[0025] Working principle: During operation, the tube-side fluid enters two flow channels from the main inlet pipe 7 through the first tube-side inlet pipe 21 and the second tube-side inlet pipe 23. Specifically, the tube-side fluid enters the first tube-side inlet pipe 21 from the main inlet pipe 7, is guided by the partition 5 to the upper half of the left tube box 2, flows to the right through the U-shaped heat exchange tubes 4 in the front half of the left fixed tube sheet 3, exchanges heat with the shell-side fluid, and then returns to the lower half of the left tube box, exiting from the first tube-side outlet pipe 22. The other fluid flows from... The main inlet pipe 7 enters the second tube inlet pipe 23, flows through the upper half of the right tube box 2, and then flows to the left through the U-shaped heat exchange tube 4 in the rear half of the right fixed tube sheet 3. After exchanging heat with the shell-side fluid, it returns to the lower half of the right tube box and is discharged from the second tube outlet pipe 24. The shell-side fluid enters the shell 1 from the shell inlet pipe 11. Guided by the upper and lower misaligned notches of the baffle plate 9, it flows laterally through the heat exchange tube bundle in an S-shaped path, enhancing turbulence and prolonging the residence time. Finally, it is discharged from the shell outlet pipe 12, completing the heat exchange.

[0026] The flow rate of the two processes is controlled by ball valve 8 to adapt to the changing operating conditions. After the sealing plate 6 is removed, the heat exchange tube 4 on one side can be mechanically cleaned through tube box 2, while the other side continues to operate.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A heat exchanger flow splitting device, characterized in that: The enclosure includes a shell (1), with a bracket (10) fixedly mounted on the bottom of the shell (1). A shell-side water inlet pipe (11) is fixedly connected and connected to the bottom left end of the shell (1), and a shell-side water outlet pipe (12) is fixedly connected and connected to the bottom right end of the shell (1). Both the left and right ends of the shell (1) are flanged and connected to pipe boxes (2). The top of the pipe box (2) on the left is fixedly connected and connected to the first-side water inlet pipe (21), and the bottom of the pipe box (2) on the left is fixedly connected and connected to the first-side water outlet pipe (22). The top of the pipe box (2) on the right is fixedly connected and connected to the second-side water inlet pipe (23), and the bottom of the pipe box (2) on the right is fixedly connected and connected to the second-side water outlet pipe (23). The tube side outlet pipe (24); the left and right ends of the shell (1) are connected to the tube box (2) by flanges. The shell (1) and the tube box (2) are fixedly provided with a fixed tube plate (3). The front half of the fixed tube plate (3) on the left is fixedly provided with multiple heat exchange tubes (4) extending to the right. The rear half of the fixed tube plate (3) on the right is fixedly provided with multiple heat exchange tubes (4) extending to the left. The inlet and outlet of the heat exchange tube (4) are connected to the inside of the tube box (2). The tube box (2) is fixedly provided with a partition plate (5) arranged horizontally along its radial direction. The inlet of the heat exchange tube (4) is located above the partition plate (5), and the outlet of the heat exchange tube (4) is located below the partition plate (5).

2. The heat exchanger diversion device according to claim 1, characterized in that: The end of the pipe box (2) away from the shell (1) is detachably fixed with a sealing plate (6) by bolts.

3. A heat exchanger diversion device according to claim 1, characterized in that: The end of the first-pass water inlet pipe (21) away from the pipe box (2) and the end of the second-pass water inlet pipe (23) away from the pipe box (2) are fixedly connected to the main water inlet pipe (7). Ball valves (8) are fixedly installed on both the first-pass water inlet pipe (21) and the second-pass water inlet pipe (23).

4. A heat exchanger diversion device according to claim 3, characterized in that: The inner diameter of the main inlet pipe (7) is larger than that of the first inlet pipe (21) and the second inlet pipe (23).

5. A heat exchanger diversion device according to claim 1, characterized in that: Multiple baffles (9) are fixedly arranged at left and right intervals inside the shell (1). A gap is left between one end of the baffle (9) and the inner wall of the shell (1) for the shell fluid to pass through. The gaps of two adjacent baffles (9) are staggered vertically.

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