Polymerization reaction kettle with automatic flushing function

Abstract

The invention discloses a polymerization reaction kettle with an automatic flushing function, and belongs to the technical field of chemical production cleaning, the polymerization reaction kettle comprises a polymerization reaction kettle, a flushing device comprises a blowing mechanism and a flushing mechanism, the blowing mechanism is rotatably connected with the flushing mechanism, a dredging mechanism is located on the outer side of the polymerization reaction kettle, and the bottom end of the dredging mechanism is located on the lower side of a discharge port. According to the invention, the blowing mechanism is driven to blow gas and the dredging mechanism is driven to dredge the discharge port by ingeniously utilizing the automatic rotation function of the flushing mechanism when the polyreactor is flushed, no extra electric energy is needed, the operation cost of an enterprise is greatly saved, and the gas is intermittently blown while the flushing mechanism flushes, so that the production efficiency is improved. According to the device, the problem of slow drying of the polymerization reaction kettle caused by blowing after flushing is solved, the problem of too fast water loss in the polymerization reaction kettle caused by continuous blowing in the polymerization reaction kettle while the polymerization reaction kettle is flushed is also solved, and the dredging mechanism is arranged externally, so that the dredging mechanism does not need to be flushed during flushing, and the water consumption is greatly saved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical production cleaning, and specifically to a polymerization reactor with an automatic flushing function. Background Art

[0002] A polymerization reactor is a device used for the polymerization reaction of chemical materials. Chemical slurries are mixed in the polymerization reactor and fully reacted by a stirrer. After the polymerization reaction, the slurry in the polymerization reactor is discharged. However, due to the viscosity of the slurry in the polymerization reactor, it will remain on the inner wall of the polymerization reactor and the stirrer. In order for the new slurry to enter the polymerization reactor for reaction next time without being affected by the residual slurry, it is necessary to flush the used polymerization reactor internally and comprehensively clean the inner wall and stirrer of the polymerization reactor. As the most convenient and effective flushing method in the prior art, a three-dimensional rotating nozzle is installed in the polymerization reactor. It consists of a water inlet pipe, a rotary joint, a rotating pipe, a nozzle head and nozzles. After high-pressure water enters the three-dimensional rotating nozzle, due to mechanisms such as worm gears inside it, the rotating pipe rotates driven by the water flow, and the rotating pipe drives the nozzle head to rotate. The nozzle head rotates on the rotating pipe driven by the reaction force of the water spray from the nozzles, so that the nozzle head rotates both self-rotationally and revolves with the rotating pipe, thus realizing water spraying without dead angles in 360 degrees in three-dimensional space to comprehensively flush the inside of the polymerization reactor. However, there are two deficiencies in the prior art: First, during the flushing process of the polymerization reactor, water hangs on the inner wall of the polymerization reactor and the stirrer, so that the polymerization reactor still needs a period of time to dry after flushing and can only be used after drying. However, the drying time is relatively long, which affects the next polymerization reaction. In the solutions of the prior art: either blow air through a blower to dry the inside of the polymerization reactor. However, as a large petrochemical company with an annual output value of hundreds of millions, our company has a large number of large-scale polymerization reactors used in the factory area. By installing blowers for blowing, the use of several blowers every year consumes a huge amount of electricity, and the company spends a huge amount of money on electricity. Moreover, in the prior art, blowing starts only after the polymerization reactor is cleaned, which still affects the drying time of the polymerization reactor. There is also some prior art that continuously blows air into the polymerization reactor while flushing it. Although this speeds up the drying of the inside of the polymerization reactor, it also causes the rapid loss of water during flushing, resulting in a waste of water resources.

[0003] Second, after the polymerization reaction, when the slurry remaining on the polymerization reactor and the agitator detaches from the slurry, some moisture is lost, causing some of the slurry remaining on the inner wall of the polymerization reactor or the agitator to dry, cake, or form lumps. After falling off after flushing, it is extremely easy to block the discharge port of the polymerization reactor, preventing the flushed slurry from being discharged. In the technical solutions of the prior art: a dredging device is installed in the reactor to dredge the discharge port when it is blocked. However, due to the presence of an agitator in the polymerization reactor, the space between the agitator and the discharge port is limited, the installation of the dredging device is complex and difficult to operate. The dredging device will also adhere to the residual slurry and needs to be cleaned, increasing the trouble. Moreover, in order to achieve automation, it also requires electric power to start, which also increases the economic burden on the enterprise. Summary of the Invention

[0004] In order to solve the technical problems mentioned in the above background art, the present invention provides a polymerization reactor with an automatic flushing function, and the technical solution adopted is as follows: It includes a polymerization reactor, on which an agitator is provided. The agitator includes a reduction motor, on which a flange is provided, and the flange is fixed on the polymerization reactor. The agitator also includes a stirring rod connected to the reduction motor, and the stirring rod extends into the interior of the polymerization reactor. Stirring blades are provided on the stirring rod. A discharge port is provided at the bottom of the polymerization reactor, and a plug valve is provided on the discharge port. A first feed port and a second feed port are provided on the polymerization reactor. A flushing device is embedded on the polymerization reactor. The flushing device includes a blowing mechanism and a flushing mechanism. The blowing mechanism is rotationally connected to the flushing mechanism. A dredging mechanism is provided on the blowing mechanism. The dredging mechanism is located outside the polymerization reactor, and the bottom end of the dredging mechanism is located below the discharge port.

[0005] Further, the flushing mechanism includes a three-dimensional rotating spray head embedded in the polymerization reactor. The three-dimensional rotating spray head includes a water inlet pipe embedded in the polymerization reactor. One end of the water inlet pipe extends into the interior of the polymerization reactor, and a rotary joint is provided at the end extending into the interior of the polymerization reactor. A rotating pipe is provided on the rotary joint, and nozzles are provided on the rotating pipe. A number of nozzles are provided along the circumferential direction of the nozzles. A worm is sleeved on the rotating pipe.

[0006] Further, a valve is provided at the outer end of the water inlet pipe located outside the polymerization reactor.

[0007] Further, the blowing mechanism includes an air cylinder embedded in the polymerization reactor. An air inlet valve and an air outlet valve are provided on the air cylinder. A blowing pipe is provided on the air outlet valve and penetrates and extends into the interior of the polymerization reactor. A piston is movably provided in the air cylinder. A lifting rod is provided on the upper part of the piston. A sealing sleeve is provided on the upper part of the air cylinder. The lifting rod movably penetrates the sealing sleeve, and a seal is formed between the lifting rod and the sealing sleeve. A dredging mechanism is provided on the lifting rod. A piston rod is provided at the bottom of the piston, and a driving member is provided on the piston rod. The driving member is rotationally connected to the worm.

[0008] Further, the driving member includes a connecting rod hinged to the piston rod. A crank is hinged to the connecting rod. A fixed shaft is provided on the crank. A worm gear is provided on the fixed shaft. The worm gear is rotatably connected to a worm.

[0009] Further, the dredging mechanism includes a U-shaped rod provided on the lifting rod. The U-shaped rod is provided outside the polymerization reactor. A fixing member is provided on the U-shaped rod. A connecting plate is provided on the fixing member. A first limiting hole is formed in the connecting plate. A ejector rod is provided on the connecting plate. The ejector rod is located below the discharge port.

[0010] Further, the fixing member includes a group of limiting blocks provided at the bottom of the U-shaped rod. Second limiting holes are formed in the limiting blocks. The fixing member further includes a rod sleeve and a fixing ring provided on the U-shaped rod. The rod sleeve is rotatably provided on the U-shaped rod. The fixing ring is fixed on the U-shaped rod. The rod sleeve is limited between the limiting block and the fixing ring.

[0011] Further, a pin is commonly provided in the first limiting hole and the second limiting hole.

[0012] Further, a beam is provided on the polymerization reactor.

[0013] The present invention has the following advantages: When the inside of the polymerization reactor needs to be rinsed, high-pressure rinsing water enters the rinsing mechanism. When the rinsing mechanism rotates to rinse the inner wall and the stirrer of the polymerization reactor, it also drives the blowing mechanism to intermittently blow gas into the polymerization reactor, so that the air flow velocity in the polymerization reactor is increased, and the water hanging on the inner wall and the stirrer of the polymerization reactor is accelerated to evaporate while rinsing the polymerization reactor. While the blowing mechanism intermittently blows gas, it also drives the dredging mechanism to intermittently dredge the discharge port, preventing the agglomerated or lumped slurry that slides down during the rinsing of the polymerization reactor from blocking the discharge port, resulting in the inability to timely discharge the rinsed slurry. The present invention cleverly utilizes the automatic rotation function of the rinsing mechanism when rinsing the polymerization reactor to drive the blowing mechanism to blow gas and the dredging mechanism to dredge the discharge port, without the need to provide additional electric energy, greatly saving the operation cost of the enterprise. And while the rinsing mechanism rinses, it intermittently blows gas, which can not only solve the problem that the polymerization reactor dries slowly when blowing after rinsing, but also solve the problem that the water in the polymerization reactor is lost too fast when continuously blowing into the polymerization reactor while rinsing the polymerization reactor. And with an external dredging mechanism, there is no need to rinse the dredging mechanism during rinsing, greatly saving water consumption. Description of the Drawings

[0014] Figure 1 is a three-dimensional view of the present invention Figure 1 ; Figure 2 is a three-dimensional view of the present invention Figure 2 ; Figure 3 The internal display three-dimensional of the present invention Figure 1 ; Figure 4 For the present invention Figure 3 The partial enlarged view at position a in the present invention; Figure 5 The internal display three-dimensional of the present invention Figure 2 ; Figure 6 For the present invention Figure 5 The partial enlarged view at position b in the present invention; Figure 7 For the present invention Figure 5 The three-dimensional view of the flushing device in the present invention.

[0015] Accompanying drawings: 1 polymerization reactor, 2 reduction motor, 3 flange, 4 stirring rod, 5 stirring blade, 6 discharge port, 7 slide valve, 8 water inlet pipe, 9 rotary joint, 10 rotary pipe, 11 spray head, 12 nozzle, 13 worm, 14 valve, 15 air cylinder, 16 piston, 17 lifting rod, 18 sealing sleeve, 19 piston rod, 20 connecting rod, 21 crank, 22 fixed shaft, 23 worm gear, 24 U-shaped rod, 25 connecting plate, 26 first limiting hole, 27 ejector rod, 28 limiting block, 29 second limiting hole, 30 rod sleeve, 31 fixing ring, 32 pin, 33 beam, 34 first feed inlet, 35 second feed inlet, 36 intake valve, 37 exhaust valve, 38 blow pipe. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figures 1-2, the present invention discloses a polymerization reactor with an automatic flushing function, including a polymerization reactor 1, on which a stirrer is provided. The slurry undergoes a polymerization reaction in the polymerization reactor 1 through the stirring of the stirrer. The stirrer includes a reduction motor 2, on which a flange 3 is provided, and the flange 3 is fixed on the polymerization reactor 1. The stirrer also includes a stirring rod 4 connected to the reduction motor 2, and the stirring rod 4 extends into the interior of the polymerization reactor 1. Stirring blades 5 are provided on the stirring rod 4. The reduction motor 2 drives the stirring rod 4 to rotate, and the stirring rod 4 drives the stirring blades 5 to rotate. The stirring blades 5 stir the slurry. A discharge port 6 is provided at the bottom of the polymerization reactor 1, and a flap valve 7 is provided on the discharge port 6. The flap valve 7 controls the opening and closing of the discharge port 6. When the polymerization reaction ends, the flap valve 7 is opened to discharge the slurry in the polymerization reactor 1. A first feed port 34 and a second feed port 35 are provided on the polymerization reactor 1, and the first feed port 34 and the second feed port 35 are connected to pipelines. Different slurries for the polymerization reaction enter the polymerization reactor 1 through the first feed port 34 and the second feed port 35 respectively. A flushing device is embedded in the polymerization reactor 1. The flushing device includes a blowing mechanism and a flushing mechanism. The blowing mechanism is rotationally connected to the flushing mechanism. While the flushing mechanism rotates to flush the inner wall of the polymerization reactor 1 and the stirring rod 4 and the stirring blades 5 inside it, it drives the blowing mechanism to intermittently blow the interior of the polymerization reactor 1. A dredging mechanism is provided on the blowing mechanism. The dredging mechanism is located outside the polymerization reactor 1, and the bottom end of the dredging mechanism is located below the discharge port 6. While the blowing mechanism intermittently blows the interior of the polymerization reactor 1, it also drives the dredging mechanism to intermittently dredge the interior of the discharge port 6.

[0018] The flushing mechanism includes a three-dimensional rotating nozzle embedded in the polymerization reactor 1. The three-dimensional rotating nozzle itself is a prior art. The three-dimensional rotating nozzle includes a water inlet pipe 8 embedded in the polymerization reactor 1. One end of the water inlet pipe 8 extends into the interior of the polymerization reactor 1, and a rotary joint 9 is provided at the end extending into the interior of the polymerization reactor 1. A rotating pipe 10 is provided on the rotary joint 9. Nozzles 12 are provided on the rotating pipe 10 along the circumferential direction. After high-pressure flushing water enters the water inlet pipe 8, it then enters the rotating pipe 10 through the rotary joint 9. The rotating pipe 10 rotates on the rotary joint 9, and the rotating pipe 10 drives the nozzle 11 to rotate. The flushing water in the rotating pipe 10 enters the nozzle 11 and then is sprayed out through the nozzles 12, causing the nozzle 11 to rotate on the rotating pipe 10 and also rotate itself, and driving the nozzles 12 to rotate, so that the flushing water sprayed out by the nozzles 12 can form a three-dimensional space spray inside the polymerization reactor 1 to flush the interior of the polymerization reactor 1. A worm 13 is sleeved on the rotating pipe 10. When the rotating pipe 10 rotates, it drives the worm 13 to rotate. A valve 14 is provided at the outer end of the water inlet pipe 8 located outside the polymerization reactor 1, and the valve 14 controls the opening and closing of the water inlet pipe 8.

[0019] The injection mechanism includes a cylinder 15 embedded in the polymerization reactor 1. An intake valve 36 and an exhaust valve 37 are provided on the cylinder 15. When a negative pressure is generated inside the cylinder 15, the external air pressure is greater than the air pressure inside the cylinder 15, and the intake valve 36 opens. External gas enters the cylinder 15 through the intake valve 36, but the gas inside the cylinder 15 cannot be discharged to the outside of the cylinder 15 through the intake valve 36. When the air pressure inside the cylinder 15 is greater than the external air pressure and the gas is compressed to a certain extent, the exhaust valve 37 opens. A spray pipe 38 is provided on the exhaust valve 37. When the exhaust valve 37 opens, the gas inside the cylinder 15 enters the spray pipe 38 through the exhaust valve 37, and external gas cannot enter the cylinder 15 through the exhaust valve 37. The spray pipe 38 penetrates and extends into the interior of the polymerization reactor 1, and the gas entering the spray pipe 38 is sprayed into the polymerization reactor 1 and discharged through the discharge port 6. A piston 16 is movably arranged inside the cylinder 15. A lifting rod 17 is provided above the piston 16. A sealing sleeve 18 is provided on the upper part of the cylinder 15. The lifting rod 17 movably penetrates the sealing sleeve 18, and a seal is formed between the lifting rod 17 and the sealing sleeve 18. A dredging mechanism is provided on the lifting rod 17. A piston rod 19 is provided at the bottom of the piston 16. A driving member is provided on the piston rod 19. The driving member is rotatably connected to the worm 13. When the worm 13 rotates, it drives the driving member, the driving member drives the piston rod 19 to move up and down, the piston rod drives the piston 16 to move up and down, and the piston 16 drives the lifting rod 17 to move up and down inside the sealing sleeve 18.

[0020] Please refer to Figures 3-4 , the driving member includes a connecting rod 20 hinged to the piston rod 19. A crank 21 is hinged on the connecting rod 20. A fixed shaft 22 is provided on the crank 21. A worm gear 23 is provided on the fixed shaft 22. The worm gear 23 is rotatably connected to the worm 13. When the worm 13 rotates, it drives the worm gear 23 to rotate. The worm gear 23 drives the fixed shaft 22 and the crank 21 to rotate. The crank 21 drives the connecting rod 20 to rotate, and the connecting rod 20 drives the piston rod 19 to move up and down.

[0021] The dredging mechanism includes a U-shaped rod 24 provided on the lifting rod 17. The U-shaped rod 24 moves up and down as the lifting rod 17 moves up and down. The U-shaped rod 24 is arranged outside the polymerization reactor 1. A fixing member is provided on the U-shaped rod 24. The fixing member moves up and down as the U-shaped rod 24 moves up and down. A connecting plate 25 is provided on the fixing member. A first limiting hole 26 is formed in the connecting plate 25. A top rod 27 is provided on the connecting plate 25. The fixing member drives the connecting plate 25 and the top rod 27 to move up and down. The top rod 27 is located below the discharge port 6, and the top rod 27 intermittently dredges the discharge port 6 through lifting.

[0022] Please refer to Figures 5-7, the fixing member includes a set of limiting blocks 28 arranged at the bottom of the U-shaped rod 24. The limiting blocks 28 are spliced and fixed at the bottom of the U-shaped rod 24. A second limiting hole 29 is formed in the limiting block 28. It also includes a rod sleeve 30 and a fixing ring 31 arranged on the U-shaped rod 24. The rod sleeve 30 is rotatably arranged on the U-shaped rod 24, and the fixing ring 31 is fixed on the U-shaped rod 24. The rod sleeve 30 is limited between the limiting block 28 and the fixing ring 31, so that when the rod sleeve 30 rotates on the U-shaped rod 24, it can only rotate between the limiting block 28 and the fixing ring 31. A pin 32 is jointly arranged in the first limiting hole 26 and the second limiting hole 29. When the pin is inserted into the first limiting hole 26 and the second limiting hole 29, the connecting plate 25 and the corresponding limiting block 28 below it are fixedly limited, preventing their positions from shifting during lifting and being unable to enter the discharge port 6. By rotating the rod sleeve 30 to drive the connecting plate 25 to rotate, when the polymerization reactor 1 is not being rinsed, the ejector rod 27 can be rotated to one side, avoiding the blockage of the discharge of the polymerization reactor 1 after the polymerization reaction. A beam 33 is arranged on the polymerization reactor 1 and is erected on the high platform through the beam 33, so that the polymerization reactor 1 is suspended.

[0023] Working principle of the present invention: When the polymerization reactor 1 needs to be flushed, rotate the connecting plate 25. The connecting plate 25 drives the rod sleeve 30 to rotate on the U-shaped rod 24, so that the connecting plate 25 is directly above one of the limit blocks 28. Then insert the bolt 32 into the first limit hole 26 and the second limit hole 29 to fix the limit block 28 and the connecting plate 25, and the ejector rod 27 is directly below the discharge port 6. Open the flap valve 7 to make the discharge port 6 open and unobstructed. Open the valve 14, and the high-pressure flushing water enters the water inlet pipe 8. After the high-pressure flushing water enters the water inlet pipe 8, it enters the rotating pipe 10 through the rotary joint 9. The rotating pipe 10 rotates on the rotary joint 9, and the rotating pipe 10 drives the spray head 11 to rotate. The flushing water in the rotating pipe 10 enters the spray head 11 and is then sprayed out through the nozzle 12, so that the spray head 11 rotates on the rotating pipe 10 and also rotates itself, driving the nozzle 12 to rotate, so that the flushing water sprayed by the nozzle 12 forms a three-dimensional space spray inside the polymerization reactor 1 to flush the residual slurry on the inner wall of the polymerization reactor 1, the stirring rod 4 and the stirring blade 5. When the rotating pipe 10 rotates, it drives the worm 13 to rotate. The worm 13 rotates to drive the worm gear 23 to rotate. The worm gear 23 drives the fixed shaft 22 and the crank 21 to rotate. The crank 21 drives the connecting rod 20 to rotate. The connecting rod 20 drives the piston rod 19 to move up and down. The piston rod 19 drives the piston 16 to move up and down in the air cylinder 15. When the piston 16 descends in the air cylinder 15, the internal space of the air cylinder 15 becomes larger, and the internal air pressure is less than the external air pressure. When it reaches a certain level, the intake valve 36 opens, and the external air enters the air cylinder 15 through the intake valve 36. When the piston 16 ascends in the air cylinder 15, the intake valve 36 closes, and the gas in the air cylinder 15 is compressed. When it reaches a certain level, the exhaust valve 37 opens, and the gas in the air cylinder 15 enters the blowpipe 38 through the exhaust valve 37. The airflow in the blowpipe 38 is blown into the polymerization reactor 1. When the piston 16 descends again, the exhaust valve 37 closes. The intermittent spraying of gas into the polymerization reactor 1 is realized by the up and down movement of the piston 16, so that during the flushing process inside the polymerization reactor 1, gas is intermittently blown, thereby accelerating the airflow velocity inside the polymerization reactor 1 and accelerating the evaporation of water inside the polymerization reactor 1, and it is discharged together with the flushed slurry through the discharge port 6. When the piston 16 moves up and down, it drives the lifting rod 17 to move up and down in the sealing sleeve 18. The lifting rod 17 drives the U-shaped rod 24, the connecting plate 25 and the ejector rod 27 to move up and down intermittently. When the ejector rod 27 rises, it enters the inside of the discharge port 6 to dredge the agglomerated or lumped slurry blocked in the discharge port 6, so that the slurry flushed down inside the polymerization reactor 1 is smoothly discharged through the discharge port 6.

[0024] The operation of the present invention is simple and convenient to use, and it is suitable for comprehensive promotion and application. Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polymerization reactor with an automatic flushing function, comprising a polymerization reactor (1), wherein the polymerization reactor (1) is provided with a stirrer, the stirrer comprising a reduction motor (2), the reduction motor (2) being provided with a flange (3), the flange (3) being fixed to the polymerization reactor (1), the stirrer further comprising a stirring rod (4) connected to the reduction motor (2), the stirring rod (4) extending into the interior of the polymerization reactor (1), the stirring rod (4) being provided with a stirring blade (5), a discharge port (6) being provided at the bottom of the polymerization reactor (1), a gate valve (7) being provided on the discharge port (6), a first feed port (34) and a second feed port (35) being provided on the polymerization reactor (1), characterized in that: A flushing device is embedded in the polymerization reactor (1), the flushing device comprising a blowing mechanism and a flushing mechanism, the blowing mechanism and the flushing mechanism are rotatably connected, a dredging mechanism is arranged on the blowing mechanism, the dredging mechanism is located outside the polymerization reactor (1), and the bottom end of the dredging mechanism is located below the discharge port (6).

2. A polymerization reactor with automatic flushing function according to claim 1, characterized in that: The flushing mechanism comprises a three-dimensional rotating nozzle embedded in the polymerization reactor (1), the three-dimensional rotating nozzle comprising a water inlet pipe (8) embedded in the polymerization reactor (1), one end of the water inlet pipe (8) extending into the polymerization reactor (1) and the other end extending into the polymerization reactor (1) is provided with a rotating joint (9), a rotating tube (10) is provided on the rotating joint (9), a nozzle (11) is provided on the rotating tube (10), a plurality of nozzles (12) are provided on the nozzle (11) along a circumferential direction, wherein a worm (13) is sleeved on the rotating tube (10).

3. A polymerization reactor with automatic flushing function according to claim 2, characterized in that: The water inlet pipe (8) is located at the outer end of the polymerization reactor (1) and is provided with a valve (14).

4. A polymerization reactor with automatic flushing function according to claim 2, characterized in that: The blowing mechanism comprises an air cylinder (15) embedded in the polymerization reactor (1), the air cylinder (15) is provided with an air inlet valve (36) and an exhaust valve (37), the exhaust valve (37) is provided with a blowing pipe (38), the blowing pipe (38) penetrates and extends into the polymerization reactor (1), a piston (16) is movably provided in the air cylinder (15), a lifting rod (17) is provided on the upper part of the piston (16), a sealing sleeve (18) is provided on the upper part of the air cylinder (15), the lifting rod (17) movably penetrates the sealing sleeve (18), a seal is formed between the lifting rod (17) and the sealing sleeve (18), a dredging mechanism is provided on the lifting rod (17), a piston rod (19) is provided at the bottom of the piston (16), a driving member is provided on the piston rod (19), and the driving member is rotatably connected to the worm (13).

5. A polymerization reactor with automatic flushing function according to claim 4, characterized in that: The driving member comprises a connecting rod (20) hinged on the piston rod (19), a crank (21) hinged on the connecting rod (20), a fixed shaft (22) provided on the crank (21), a worm gear (23) provided on the fixed shaft (22), and the worm gear (23) is rotatably connected to the worm (13).

6. A polymerization reactor with automatic flushing function according to claim 4, characterized in that: The dredging mechanism comprises a U-shaped rod (24) arranged on a lifting rod (17), the U-shaped rod (24) being arranged outside the polymerization reactor (1), a fixing piece being arranged on the U-shaped rod (24), a connecting plate (25) being arranged on the fixing piece, a first limiting hole (26) being opened on the connecting plate (25), a push rod (27) being arranged on the connecting plate (25), and the push rod (27) being located at the lower side of the discharge port (6).

7. A polymerization reactor with automatic flushing function according to claim 6, characterized in that: The fixing member comprises a group of limit blocks (28) arranged at the bottom of the U-shaped rod (24), the limit blocks (28) being provided with second limit holes (29), and also comprises a rod sleeve (30) and a fixing ring (31) arranged on the U-shaped rod (24), the rod sleeve (30) being rotatably arranged on the U-shaped rod (24), the fixing ring (31) being fixed on the U-shaped rod (24), and the rod sleeve (30) being limited between the limit blocks (28) and the fixing ring (31).

8. A polymerization reactor with automatic flushing function according to claim 7, characterized in that: A latch pin (32) is disposed in both the first limiting hole (26) and the second limiting hole (29).

9. A polymerization reactor with automatic flushing function according to claim 1, characterized in that: A beam (33) is provided on the polymerization reactor (1).

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