Anti-fouling tube heat exchanger

Abstract

The utility model discloses a kind of anti-deposition tube bank heat exchanger, it belongs to heat exchanger field, it is equipped with staggered gap between adjacent baffle and shell, the both ends of fixed track are equipped with inclination, the top of the both ends of fixed track is equipped with round angle, can effectively avoid the retention of deposit, avoid fixed track end portion to form flow dead zone. It mainly includes shell, the both sides of shell are tube sheet, the shell is equipped with several baffle in through fixed-distance structure, staggered gap is equipped between adjacent baffle and shell, several baffle are all fixedly installed in shell through several fixed tracks, several heat exchange pipes are evenly inserted on several baffle, the both ends of several heat exchange pipes are respectively inserted on the both sides of tube sheet. The utility model is mainly used for anti-deposition heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of heat exchangers, and more specifically, to an anti-deposition tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers are widely used in chemical, petroleum, power, light industry, metallurgy, nuclear energy, shipbuilding, aviation, and heating industries, playing a particularly important role in petroleum refining and chemical processing plants. Under certain operating conditions, the fluid contains significant amounts of mechanical impurities or organic matter. These substances flow slowly in the dead zones of the shell-and-tube heat exchanger, easily depositing within these zones and spreading into the non-dead zones, covering the surface of the heat exchange tubes and forming large amounts of deposits. This severely impacts the heat exchanger's efficiency and can even cause serious corrosion of the heat exchange tubes or shell, affecting the safety of equipment operation. Utility Model Content

[0003] The purpose of this utility model is to provide an anti-deposition tube heat exchanger, which has staggered gaps between adjacent baffles and the shell, inclined angles at both ends of the fixed track, and rounded corners at the top of both ends of the fixed track, which can effectively prevent the retention of deposits and avoid the formation of flow dead zones at the ends of the fixed track.

[0004] This utility model is achieved through the following technical solution: A shell-and-tube heat exchanger with anti-deposition features includes a shell with tube sheets on both sides. Several baffles are installed inside the shell via a fixed-distance structure. Adjacent baffles are separated from the shell by staggered gaps. The baffles are fixedly installed inside the shell via several fixed rails. Several heat exchange tubes are evenly inserted into the baffles, with both ends of the heat exchange tubes inserted into the tube sheets on both sides.

[0005] Furthermore, the fixed-distance structure includes several tie rods and several fixed-distance tubes. One end of each tie rod is fixed to a tube sheet on one side. Several fixed-distance tubes are provided between adjacent baffles. The tie rods pass through the baffles and the fixed-distance tubes between the baffles. The other end of the tie rods is threaded and fixed to the baffles with nuts. The diameter of the holes opened on the baffles is only large enough for the tie rods to pass through. Therefore, the fixed-distance tubes can control the spacing between the baffles.

[0006] Furthermore, the aforementioned spaced tubes are welded to the baffles.

[0007] Furthermore, all of the aforementioned baffles are circular with a superior arc, and the gaps formed between adjacent circular baffles and the shell are staggered.

[0008] Furthermore, the aforementioned fixed tracks are welded to the inner wall of the shell, and the several baffles are welded to the several fixed tracks.

[0009] Furthermore, the aforementioned heat exchange tubes are welded to the tube sheet.

[0010] Furthermore, it also includes pipe boxes on both sides, which are connected to the pipe sheets on both sides by fasteners.

[0011] Furthermore, a support is welded to the bottom of the shell.

[0012] Furthermore, the fixed rails are provided with an inclination angle of 10°-13° at both ends, and the top of both ends of the fixed rails are provided with rounded corners.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. By staggering the gaps between adjacent baffles and the shell, and by setting an 11.5° inclination angle at both ends of the fixed track, and by rounding the top of both ends of the fixed track, it is possible to effectively prevent the retention of sediments, avoid the formation of flow dead zones at the ends of the fixed track, and also effectively prevent the tube bundle from scratching the inner wall of the shell when it enters the shell.

[0014] 2. The baffles are spaced at a fixed interval by the spacer tubes, and the left side of the tie rod is then locked with a nut, which allows for quick assembly and welding.

[0015] 3. It effectively solves the problems of deposits severely affecting the heat exchange efficiency of heat exchangers and deposits severely corroding heat exchange tubes or shells. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of section AA of this utility model; Figure 3 This is a schematic diagram of the structure of the baffle plate of this utility model; Figure 4 This is a schematic diagram of the structure of the fixed track of this utility model.

[0017] In the diagram: 1. Tube box; 2. Tube sheet; 3. Nut; 4. Tie rod; 5. Spacing tube; 6. Baffle plate; 7. Shell; 8. Heat exchange tube; 9. Fastener; 10. Support; 11. Fixed track. Detailed Implementation

[0018] The present invention will now be further described.

[0019] like Figure 1 – Figure 4As shown in the embodiment, an anti-deposition shell-and-tube heat exchanger includes a shell 7, with tube sheets 2 on both sides of the shell 7. A plurality of baffles 6 are installed inside the shell 7 by a fixed-distance structure. Adjacent baffles 6 are provided with staggered gaps between them and the shell 7. The plurality of baffles 6 are all fixedly installed inside the shell 7 by a plurality of fixed rails 11. A plurality of heat exchange tubes 8 are evenly inserted on the plurality of baffles 6, with both ends of the plurality of heat exchange tubes 8 respectively inserted on the tube sheets 2 on both sides. The plurality of baffles 6 are all of the superior arc circle type, and the gaps formed between adjacent superior arc circles and the shell 7 are staggered.

[0020] Specifically, the staggered gap between the baffle plate 6 and the inner wall of the shell 7 can effectively prevent the retention of sediment.

[0021] The fixed-distance structure includes several tie rods 4 and several fixed-distance tubes 5. One end of each tie rod 4 is fixed to one side of the tube sheet 2. Several fixed-distance tubes 5 are provided between adjacent baffles 6. The tie rods 4 pass through the baffles 6 and the fixed-distance tubes 5 between the baffles 6. The other end of the tie rod 4 is threaded and fixed to the baffle 6 by a nut 3. The diameter of the hole opened on the baffle 6 is only large enough for the tie rods 4 to pass through. Therefore, the fixed-distance tubes 5 can control the spacing between the baffles 6.

[0022] Specifically, the baffle plate 6 forms a fixed spacing through the spacer tube 5, and the left side of the tie rod 4 is then locked with a nut, allowing for quick assembly.

[0023] The plurality of fixed-distance tubes 5 are welded to the baffles 6; the plurality of fixed tracks 11 are welded to the inner wall of the shell 7, and the plurality of baffles 6 are welded to the plurality of fixed tracks 11; the plurality of heat exchange tubes 8 are welded to the tube sheet 2.

[0024] Specifically, the baffle plate 6 has a welding port that matches the shape of the fixed track 11, increasing the welding area and improving overall stability.

[0025] It also includes pipe boxes 1 on both sides, which are connected to pipe plates 2 on both sides by fasteners 9 respectively.

[0026] Specifically, fastener 9 is a bolt and nut, and the connection between tube box 1 and tube sheet 2 is existing technology.

[0027] A support 10 is welded to the bottom of the shell 7.

[0028] The fixed rails 11 have an inclination angle of 11.5° at both ends and rounded corners at the top of both ends to avoid forming a flow dead zone at the ends of the fixed rails 11 and to effectively prevent the tube bundle from scratching the inner wall of the housing 7 when it enters the housing 7.

[0029] One end of the tie rod 4 is fixed to the right tube sheet 2. A baffle plate 6 is placed after each set of spaced tubes 5. After the baffle plates 6 are arranged, the end of the tie rod 4 is locked with a nut 3. The heat exchange tubes 8 are sequentially inserted from the left side into each baffle plate 6 to the right tube sheet 2. After all the heat exchange tubes 8 are inserted, the fixing rail 11 is welded to the baffle plate 6. The assembled tube bundle is then installed into the shell 7, and finally, the left tube sheet 2 is aligned. The heat exchange tubes 8 are then guided into the left tube sheet 2, and the corresponding welding work is completed. Finally, the support 10 is welded onto the shell 7, and the assembled shell 7 is assembled with the left and right tube boxes 1 using bolts and nuts. This completes the assembly of the anti-deposition shell-and-tube heat exchanger.

Claims

1. A shell-and-tube heat exchanger with anti-deposition properties, comprising a shell (7) and tube sheets (2) on both sides of the shell (7), characterized in that: Several baffles (6) are installed inside the shell (7) by a fixed spacing structure. There are staggered gaps between adjacent baffles (6) and the shell (7). Several baffles (6) are fixedly installed inside the shell (7) by several fixed rails (11). Several heat exchange tubes (8) are evenly inserted on several baffles (6). The two ends of several heat exchange tubes (8) are respectively inserted on the tube sheets (2) on both sides.

2. The anti-deposition tube heat exchanger according to claim 1, characterized in that: The fixed-distance structure includes several tie rods (4) and several fixed-distance tubes (5). One end of each tie rod (4) is fixed on one side of the tube sheet (2). Several fixed-distance tubes (5) are provided between adjacent baffles (6). The tie rods (4) pass through the baffles (6) and the fixed-distance tubes (5) between the baffles (6). The other end of the tie rods (4) is threaded and fixed to the baffles (6) by nuts (3).

3. The anti-deposition tube heat exchanger according to claim 2, characterized in that: The aforementioned fixed-distance tubes (5) are welded to the baffle plate (6).

4. The anti-deposition tube heat exchanger according to claim 1, characterized in that: The aforementioned baffles (6) are all circular with an arc shape, and the gaps formed between adjacent circular baffles and the shell (7) are staggered.

5. The anti-deposition tube heat exchanger according to claim 1, characterized in that: The aforementioned fixed tracks (11) are welded to the inner wall of the shell (7), and the several baffles (6) are welded to the several fixed tracks (11).

6. The anti-deposition tube heat exchanger according to claim 1, characterized in that: The aforementioned heat exchange tubes (8) are welded to the tube sheet (2).

7. The anti-deposition tube heat exchanger according to claim 1, characterized in that: It also includes pipe boxes (1) on both sides, which are connected to the pipe plates (2) on both sides by fasteners (9).

8. The anti-deposition tube heat exchanger according to claim 1, characterized in that: A support (10) is welded to the bottom of the shell (7).

9. The anti-deposition tube heat exchanger according to claim 1, characterized in that: The fixed tracks (11) are provided with an inclination angle of 10°-13° at both ends, and the top of both ends of the fixed tracks (11) are provided with rounded corners.

Images