Heat exchanger for acetic acid production based on transverse tube falling film evaporation technology

Abstract

The invention relates to the technical field of acetic acid production, and discloses a heat exchanger for acetic acid production based on a horizontal tube falling film evaporation technology, which comprises a tank body, a connecting ring a fixedly sleeved on the tank body, a connecting ring b fixedly connected on the connecting ring a through a bolt and a nut, a tank tail fixedly connected in the connecting ring b, and two support frames fixedly mounted on the tank tail, a fixing block is arranged in the tank tail, a plurality of arc-shaped grooves are formed in the fixing block, an arc-shaped pipe is movably connected into each arc-shaped groove, each connecting pipe is connected to a heat exchange pipe in the tank body in a sleeving mode, then the tank body and the tank tail can be fixed through bolts and nuts, and therefore the arc-shaped pipes can be connected with the heat exchange pipes. And when the heat exchange tubes need to be cleaned, the tank tail can be detached, so that the heat exchange tubes and the arc-shaped tubes can be cleaned one by one, and the situation that the arc-shaped parts of the arc-shaped heat exchange tubes are difficult to clean can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of acetic acid production, in particular to a heat exchanger for acetic acid production based on a horizontal tube falling film evaporation technology. Background Art

[0002] Heat exchangers are devices that transfer part of the heat of hot fluid to cold fluid, also known as heat exchangers. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used. Heat exchangers are needed for the production of acetic acid, and some of the heat exchange tubes in some existing heat exchangers are arranged in an arc shape for circulation. Therefore, when the heat exchange tubes are used for a long time and scale is generated inside, they need to be cleaned. However, most of the heat exchange tubes are integrated, which will make it extremely time-consuming and laborious to clean the arc part later. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the present invention provides a heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology, which has the advantages of being able to clean the heat exchange tubes and the arc tubes one by one, thereby avoiding the difficulty in cleaning the arc portion of the arc heat exchange tube, etc., and solves the problem that a part of the heat exchange tubes in some existing heat exchangers are arranged in an arc shape for circulation, so when scale is generated inside the heat exchange tubes after being used for a long time, they need to be cleaned, but most of the heat exchange tubes are integrated, which will result in the problem that it is extremely time-consuming and labor-intensive to clean the arc portion at a later stage.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose of cleaning the heat exchange tubes and arc tubes one by one, thereby avoiding the arc part of the arc heat exchange tube being difficult to clean, the present invention provides the following technical solution: a heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology, comprising a tank body, a connecting ring a is fixedly sleeved on the tank body, a connecting ring b is fixedly connected to the connecting ring a by bolts and nuts, a tank tail is fixedly connected inside the connecting ring b, two support frames are fixedly installed on the tank tail, a fixing block is arranged inside the tank tail, a plurality of arc grooves are opened on the fixing block, an arc tube is movably connected in each arc groove, small arc tubes are movably sleeved at both ends of each arc tube, and the left end of each small arc tube is fixedly installed Small rings are installed, and a connecting pipe is fixedly installed on the right side of each small ring. Sealing rings are fixedly installed on the left and right sides of each small ring. Each sealing ring is fixedly connected to the inner wall of each small arc tube and the inner wall of each connecting pipe respectively. By respectively sleeved each connecting pipe on the heat exchange tube in the tank body, the tank body and the tank tail can be fixed with bolts and nuts, so that the arc tube and the heat exchange tube can be connected, so that the heat exchange tube can cooperate with the arc tube to make the internal water flow back and forth. When the heat exchange tube needs to be cleaned, the tank tail can be disassembled, so that the heat exchange tube and the arc tube can be cleaned one by one, thereby avoiding the difficulty in cleaning the arc part of the arc heat exchange tube.

[0007] Preferably, an arc-shaped plate is fixedly installed on the left side of the fixed block, two extrusion blocks are fixedly installed on the left side of the arc-shaped plate, two support tubes are fixedly passed through the left wall of the tank tail, a pressure plate is movably connected in each support tube, pressure springs are fixedly installed on the right side of the two pressure plates, circular plates are fixedly installed on the right ends of the two pressure springs, and the two extrusion blocks are movably connected to the two support tubes respectively.

[0008] Preferably, pressure rods are fixedly installed on the left sides of the two pressure plates, a horizontal plate is fixedly installed on the two pressure rods, a cylinder is fixedly installed on the left side of the horizontal plate, the output shaft of the cylinder movably passes through the horizontal plate, a support plate is fixedly installed on the right end of the output shaft of the cylinder, the support plate is fixedly connected to the left ends of the two support tubes, sliding grooves are opened on the front and rear sides of the fixed block, mounting plates are movably connected in the two sliding grooves, and the two mounting plates are fixedly connected to the inner wall of the tank tail.

[0009] Preferably, a limit plate is fixedly sleeved on each of the arc-shaped tubes, each limit plate is fitted with the upper side of the fixed block, and hoses are provided on the left and right sides of each small ring, and each hose is fixedly connected to each sealing ring respectively.

[0010] Preferably, a guide ring is fixedly mounted on one end of each of the hoses away from each sealing ring, and the cross section of each guide ring is trapezoidal.

[0011] Preferably, two oblique bars are arranged above a plurality of the limit plates, two fixing bars are fixedly installed on the upper side of the fixing block, connecting grooves are provided on the two fixing bars, and the two oblique bars are movably connected to the two connecting grooves respectively.

[0012] Preferably, a square plate is fixedly installed on the right side of the oblique bar, a small block is fixedly installed on the upper side of the two fixed bars, and a small column is fixedly installed on the right side of the two small blocks.

[0013] Preferably, the two small columns are movably sleeved with a rotating tube, the outer side walls of the two rotating tubes are fixedly mounted with blocking strips, the two small columns are fixedly sleeved with a ring plate, and the two ring plates are respectively fitted with the right sides of the two rotating tubes.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the present invention provides a heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology, which has the following beneficial effects:

[0016] 1. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology, by respectively sleeved each connecting pipe on the heat exchange tube in the tank body, and then the tank body and the tank tail can be fixed with bolts and nuts, so that the arc tube can be connected with the heat exchange tube, so that the heat exchange tube can cooperate with the arc tube to make the internal water flow back and forth. When the heat exchange tube needs to be cleaned, the tank tail can be disassembled, so that the heat exchange tube and the arc tube can be cleaned one by one, thereby avoiding the arc part of the arc heat exchange tube being difficult to clean.

[0017] 2. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology can drive the supporting plate and the horizontal plate to move the two pressure rods left and right through the back and forth extension and contraction of the cylinder. After connecting the tank body and the tank tail, the two pressure rods are driven to move to the right by the cylinder, thereby driving the two fixed blocks to move to the right, so that the two pressure springs can be driven to apply pressure to the two circular plates, so that the two circular plates can apply pressure to the two extrusion blocks respectively, so that the arc plate and the fixed block can be driven to move to the right, so that each arc tube can be driven to move to the right, so that the extrusion sealing ring can be driven to seal the arc tube and the heat exchange tube, so that the pressure spring can apply pressure to seal the arc tube and the heat exchange tube while avoiding damage to the sealing ring caused by excessive pressure due to hard extrusion.

[0018] 3. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology can limit the arc tube into the arc groove by the limit plate, so that the arc tube and the heat exchange tank can be aligned when the tank body and the tank tail are connected. The small arc tube can be first put on the arc tube through the hose, and the hose enters the arc tube to squeeze the inner wall of the arc tube by using the toughness of the hose, so that the small arc tube can be temporarily and simply fixed to the arc tube, thereby avoiding the small arc tube from falling off when the tank body and the tank tail are connected.

[0019] 4. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology can guide two hoses through a guide ring, so that the hoses can be smoothly inserted into the arc tube when the user sleeves the small arc tube, thereby avoiding the hoses being unable to enter the arc tube when the small arc tube is sleeved.

[0020] 5. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology can be inserted into two connecting grooves respectively through the inclined bars after the arc tube is inserted, so that the two inclined bars can be used to support a number of limit plates, thereby preventing the arc tube from moving and affecting the connection between the arc tube and the heat exchange tube. At the same time, before inserting the connecting groove, the blocking bar is rotated and moved to face upward, so that the inclined bar can be inserted into the connecting groove, and then the two blocking bars are rotated downward, so that the blocking bars can be used in conjunction with the square plates to limit the inclined bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the cutaway three-dimensional structure of the middle tank tail;

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the middle fixed block;

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the cross-sectional three-dimensional structure of small and medium arc tubes;

[0025] Figure 5 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the middle curved plate;

[0026] Figure 6 For the present invention Figure 1 Schematic diagram of the three-dimensional structure of the middle support tube;

[0027] Figure 7 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the middle pressure rod;

[0028] Figure 8 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the middle oblique strip;

[0029] Fig. 9 For the present invention Figure 8 Schematic diagram of the three-dimensional structure of the rotating tube.

[0030] In the figure: 1. tank body; 2. tank tail; 3. support pipe; 4. cylinder; 5. pressure rod; 6. support plate; 7. support frame; 8. mounting plate; 9. arc plate; 10. horizontal plate; 11. round plate; 12. pressure spring; 13. pressure plate; 14. extrusion block; 15. fixed block; 16. arc tube; 17. small ring; 18. connecting pipe; 19. sealing ring; 20. hose; 21. guide ring; 22. small arc tube; 23. arc groove; 24. slide groove; 25. limit plate; 26. oblique strip; 27. connecting groove; 28. fixed strip; 29. ​​small block; 30. rotating tube; 31. square plate; 32. ring plate; 33. small column; 34. blocking strip; 35. connecting ring a; 36. connecting ring b. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings, wherein the same components are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower", "bottom surface" and "top surface" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 9The present invention provides a technical solution: a heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology, comprising a tank body 1, a connecting ring a35 is fixedly sleeved on the tank body 1, a connecting ring b36 is fixedly connected to the connecting ring a35 by bolts and nuts, a tank tail 2 is fixedly connected inside the connecting ring b36, two support frames 7 are fixedly installed on the tank tail 2, a fixing block 15 is arranged inside the tank tail 2, a plurality of arc grooves 23 are opened on the fixing block 15, an arc tube 16 is movably connected inside each arc groove 23, small arc tubes 22 are movably sleeved at both ends of each arc tube 16, a small ring 17 is fixedly installed on the left end of each small arc tube 22, a connecting pipe 18 is fixedly installed on the right side of each small ring 17, and each small ring 17 has a connecting pipe 18 on both sides. A sealing ring 19 is fixedly installed, and each sealing ring 19 is fixedly connected to the inner wall of each small arc tube 22 and the inner wall of each connecting tube 18. By sleeve-fitting each connecting tube 18 on the heat exchange tube in the tank body 1, the tank body 1 and the tank tail 2 can be fixed with bolts and nuts, so that the arc tube 16 can be connected with the heat exchange tube, so that the heat exchange tube can cooperate with the arc tube 16 to make the internal water flow back and forth. When the heat exchange tube needs to be cleaned, the tank tail 2 can be disassembled, so that the heat exchange tube and the arc tube 16 can be cleaned one by one, so as to avoid the arc part of the arc heat exchange tube being difficult to clean. An arc plate 9 is fixedly installed on the left side of the fixing block 15, and two extrusion blocks 1 are fixedly installed on the left side of the arc plate 9. 4. Two support tubes 3 are fixedly passed through the left wall of the tank tail 2, and a pressure plate 13 is movably connected in each support tube 3. Pressure springs 12 are fixedly installed on the right sides of the two pressure plates 13, and circular plates 11 are fixedly installed on the right ends of the two pressure springs 12. Two extrusion blocks 14 are movably connected with the two support tubes 3 respectively. Pressure rods 5 are fixedly installed on the left sides of the two pressure plates 13. A horizontal plate 10 is fixedly installed on the two pressure rods 5. A cylinder 4 is fixedly installed on the left side of the horizontal plate 10. The output shaft of the cylinder 4 movably passes through the horizontal plate 10. A support plate 6 is fixedly installed on the right end of the output shaft of the cylinder 4. The support plate 6 is fixedly connected to the left ends of the two support tubes 3. Slide grooves 24 are provided on both sides of the fixed block 15. The two slide grooves 24 are movably connected. A mounting plate 8 is connected, and the two mounting plates 8 are fixedly connected to the inner wall of the tank tail 2. The cylinder 4 can move the supporting plate 6 and the horizontal plate 10 to move the two pressure rods 5 left and right through the back and forth extension of the cylinder 4. After the tank body 1 and the tank tail 2 are connected, the cylinder 4 is used to drive the two pressure rods 5 to move to the right, so that the two fixed blocks 15 can be driven to move to the right, so that the two pressure springs 12 can be driven to apply pressure to the two circular plates 11, so that the two circular plates 11 can be used to apply pressure to the two extrusion blocks 14 respectively, so that the arc plate 9 and the fixed block 15 can be driven to move to the right, so that each arc tube 16 can be driven to move to the right, so that the extrusion sealing ring 19 can be driven to seal the arc tube 16 with the heat exchange tube.In this way, the pressure spring 12 can be used to apply pressure to seal the arc tube 16 with the heat exchange tube while avoiding damage to the sealing ring 19 caused by excessive pressure due to hard squeezing. A limit plate 25 is fixedly sleeved on each arc tube 16, and each limit plate 25 is fitted with the upper side of the fixed block 15. A hose 20 is provided on the left and right sides of each small ring 17, and each hose 20 is fixedly connected to each sealing ring 19 respectively. The limit plate 25 can be used to limit the arc tube 16 when the user inserts it into the arc groove 23, so that the arc tube 16 can be aligned with the heat exchange tank when the tank body 1 and the tank tail 2 are connected. The hose 20 can When the small arc tube 22 is first sleeved on the arc tube 16, the hose 20 enters the arc tube 16 so that the toughness of the hose 20 is used to squeeze the inner wall of the arc tube 16, so that the small arc tube 22 can be temporarily fixed to the arc tube 16, thereby preventing the small arc tube 22 from falling off when connecting the tank body 1 and the tank tail 2. Each end of each hose 20 away from each sealing ring 19 is fixedly installed with a guide ring 21, and the cross section of each guide ring 21 is trapezoidal. The guide ring 21 can guide the two hoses 20, so that when the user sleeves the small arc tube 22, the hose 20 can be smoothly inserted into the arc tube 16, thereby avoiding the sleeve connection. When the small arc tube 22 is used, the hose 20 cannot enter the arc tube 16. Two oblique bars 26 are arranged above the plurality of limit plates 25. Two fixed bars 28 are fixedly installed on the upper side of the fixed block 15. The two fixed bars 28 are provided with connecting grooves 27. The two oblique bars 26 are movably connected with the two connecting grooves 27 respectively. A square plate 31 is fixedly installed on the right side of the oblique bars 26. Small blocks 29 are fixedly installed on the upper sides of the two fixed bars 28. Small columns 33 are fixedly installed on the right sides of the two small blocks 29. Rotating tubes 30 are movably sleeved on the two small columns 33. The outer walls of the two rotating tubes 30 are fixedly installed with blocking bars 34. The two small columns 33 are fixedly installed with a plurality of stoppers 35. The two ring plates 32 are fixedly sleeved on the two rotating tubes 30, and the two ring plates 32 are respectively fitted with the right sides of the two rotating tubes 30. After the arc tube 16 is inserted, the oblique bars 26 can be respectively inserted into the two connecting grooves 27. In this way, the two oblique bars 26 can be used to resist a number of limit plates 25, thereby preventing the arc tube 16 from moving and affecting the connection between the arc tube 16 and the heat exchange tube. At the same time, before inserting the connecting groove 27, the blocking bar 34 is rotated and moved to face upward, so that the oblique bar 26 can be inserted into the connecting groove 27, and then the two blocking bars 34 are rotated downward, so that the blocking bar 34 can be used to cooperate with the square plate 31 to limit the oblique bar 26.

[0034] When in use, the first step is to respectively sleeve each connecting pipe 18 on the heat exchange tube in the tank body 1, and then use bolts and nuts to fix the tank body 1 and the tank tail 2, so that the arc tube 16 can be connected with the heat exchange tube, so that the heat exchange tube can cooperate with the arc tube 16 to make the internal water flow back and forth. When the heat exchange tube needs to be cleaned, the tank tail 2 can be disassembled, so that the heat exchange tube and the arc tube 16 can be cleaned one by one, thereby avoiding the arc part of the arc heat exchange tube being difficult to clean.

[0035] Step 2: The back and forth extension and retraction of the cylinder 4 can drive the supporting plate 6 and the cross plate 10 to move the two pressure rods 5 left and right. After connecting the tank body 1 and the tank tail 2, the cylinder 4 is used to drive the two pressure rods 5 to move to the right, so that the two fixed blocks 15 can be driven to move to the right, so that the two pressure springs 12 can be driven to apply pressure to the two circular plates 11, so that the two circular plates 11 can be used to apply pressure to the two extrusion blocks 14 respectively, so that the arc plate 9 and the fixed block 15 can be driven to move to the right, so that each arc tube 16 can be driven to move to the right, so that the extrusion sealing ring 19 can be driven to seal the arc tube 16 with the heat exchange tube, so that the pressure spring 12 can be used to apply pressure to the arc tube 16 with the heat exchange tube, while avoiding hard extrusion that causes the sealing ring 19 to be damaged by excessive pressure.

[0036] Step 3: The limiting plate 25 can be used to limit the arc tube 16 when the user inserts it into the arc groove 23, so that the arc tube 16 can be aligned with the heat exchange tank when the tank body 1 and the tank tail 2 are connected. The small arc tube 22 can be first put on the arc tube 16 through the hose 20, and the hose 20 enters the arc tube 16 to squeeze the inner wall of the arc tube 16 by utilizing the toughness of the hose 20, so that the small arc tube 22 can be temporarily and simply fixed to the arc tube 16, thereby preventing the small arc tube 22 from falling off when the tank body 1 and the tank tail 2 are connected.

[0037] Step 4: The two hoses 20 can be guided by the guide ring 21, so that the hoses 20 can be smoothly inserted into the arc tube 16 when the user sleeves the small arc tube 22, thereby avoiding the hoses 20 being unable to enter the arc tube 16 when the small arc tube 22 is sleeved.

[0038] Step 5: After inserting the arc tube 16, the bevel bars 26 can be inserted into the two connecting grooves 27 respectively, so that the two bevel bars 26 can be used to resist the plurality of limit plates 25, thereby preventing the arc tube 16 from moving and affecting the connection between the arc tube 16 and the heat exchange tube. At the same time, before inserting the connecting groove 27, the blocking bar 34 is rotated and moved to face upward, so that the bevel bar 26 can be inserted into the connecting groove 27, and then the two blocking bars 34 are rotated downward, so that the blocking bars 34 can be used in conjunction with the square plate 31 to limit the bevel bar 26.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger for acetic acid production based on horizontal tube falling film evaporation technology, comprising a tank body (1), characterized in that: The tank body (1) is fixedly sleeved with a connecting ring a (35), the connecting ring a (35) is fixedly connected with a connecting ring b (36) via bolts and nuts, the tank tail (2) is fixedly connected inside the connecting ring b (36), the tank tail (2) is fixedly mounted with two supporting frames (7), a fixing block (15) is arranged inside the tank tail (2), a plurality of arc grooves (23) are opened on the fixing block (15), and an arc groove (23) is movably connected inside each arc groove (23). Tube (16), both ends of each arc tube (16) are movably sleeved with a small arc tube (22), a small ring (17) is fixedly installed on the left end of each small arc tube (22), a connecting tube (18) is fixedly installed on the right side of each small ring (17), and a sealing ring (19) is fixedly installed on the left and right sides of each small ring (17), and each sealing ring (19) is respectively fixedly connected to the inner side wall of each small arc tube (22) and the inner side wall of each connecting tube (18).

2. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology according to claim 1, characterized in that: The left side of the fixed block (15) is fixedly mounted with an arc plate (9), and the left side of the arc plate (9) is fixedly mounted with two extrusion blocks (14). The left wall of the tank tail (2) is fixedly penetrated with two support tubes (3), and each support tube (3) is movably connected with a pressure plate (13). The right sides of the two pressure plates (13) are fixedly mounted with pressure springs (12), and the right ends of the two pressure springs (12) are fixedly mounted with circular plates (11), and the two extrusion blocks (14) are movably connected with the two support tubes (3) respectively.

3. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology according to claim 2, characterized in that: A pressure rod (5) is fixedly installed on the left side of the two pressure plates (13), a transverse plate (10) is fixedly installed on the two pressure rods (5), a cylinder (4) is fixedly installed on the left side of the transverse plate (10), an output shaft of the cylinder (4) movably passes through the transverse plate (10), a support plate (6) is fixedly installed on the right end of the output shaft of the cylinder (4), the support plate (6) is fixedly connected to the left ends of the two support pipes (3), a slide groove (24) is opened on both the front and rear sides of the fixed block (15), a mounting plate (8) is movably connected in the two slide grooves (24), and the two mounting plates (8) are fixedly connected to the inner wall of the tank tail (2).

4. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology according to claim 1, characterized in that: A limit plate (25) is fixedly sleeved on each of the arc-shaped tubes (16), and each limit plate (25) is fitted with the upper side of the fixed block (15). A hose (20) is provided on the left and right sides of each small ring (17), and each hose (20) is fixedly connected to each sealing ring (19) respectively.

5. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology according to claim 1, characterized in that: A guide ring (21) is fixedly mounted on one end of each hose (20) away from each sealing ring (19), and the cross section of each guide ring (21) is trapezoidal.

6. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology according to claim 4, characterized in that: Two oblique bars (26) are arranged above the plurality of limit plates (25), two fixing bars (28) are fixedly installed on the upper side of the fixing block (15), and the two fixing bars (28) are both provided with connecting grooves (27), and the two oblique bars (26) are movably connected to the two connecting grooves (27) respectively.

7. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology according to claim 6, characterized in that: A square plate (31) is fixedly mounted on the right side of the inclined strip (26), a small block (29) is fixedly mounted on the upper side of the two fixed strips (28), and a small column (33) is fixedly mounted on the right side of the two small blocks (29).

8. The heat exchanger for acetic acid production based on the horizontal tube falling film evaporation technology according to claim 7, characterized in that: The two small columns (33) are both movably sleeved with a rotating tube (30), the outer side walls of the two rotating tubes (30) are both fixedly mounted with a blocking strip (34), the two small columns (33) are both fixedly sleeved with a ring plate (32), and the two ring plates (32) are respectively fitted with the right sides of the two rotating tubes (30).

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