Condensing device for producing polyolefin adhesive

Abstract

The invention discloses a condensing device for producing a polyolefin adhesive, and relates to the technical field of polyolefin adhesive production, the condensing device comprises a shell tube, a front tube box, a rear tube box, a tube bundle, a net-shaped tube and a connecting plate, the tube bundle is composed of a plurality of straight tubes, the net-shaped tube is connected in the plurality of straight tubes on the upper side, and the connecting plate is connected in the net-shaped tube. The front pipe box is provided with a plurality of netlike pipes, the netlike pipes can reciprocate in the corresponding straight pipes, the netlike pipes are attached to the inner walls of the corresponding straight pipes, the netlike pipes are made of metal wires, the connecting plate reciprocates in the front pipe box, the connecting plate reciprocates in the axial direction of the straight pipes, and the netlike pipes are detachably connected with the connecting plate. According to the invention, reciprocating motion is carried out through the arranged net-shaped pipe, so that a deposition layer is effectively prevented from being thickened, a flow channel is kept smooth, the continuous production period is greatly prolonged, non-planned shutdown is reduced, and the production benefit and the equipment management level are comprehensively improved.

Description

Technical Field

[0001] This invention relates to the field of polyolefin adhesive production technology, and particularly to a condensation device for producing polyolefin adhesives. Background Technology

[0002] The condensation process in the production of polyolefin adhesives refers to the cooling of the high-temperature mixed volatile gases (containing oil mist, water vapor, monomers, etc.) extracted by the vacuum devolatilization system of the extruder, transforming them from a gaseous or aerosol state into a liquid state. This process aims to achieve material recovery, protect the vacuum pump, and prevent environmental pollution, and is a key link in ensuring continuous production and compliance with environmental standards.

[0003] Since polyolefin volatiles are usually weakly acidic or corrosive, and shell-and-tube condensers have significant advantages in terms of material adaptability, structural reliability and anti-clogging ability, shell-and-tube condensers are generally used as the core equipment in this process. However, polyolefin volatiles often contain micron-sized viscous aerosols, which are easy to adhere to and accumulate on the inner wall of the condenser tubes, forming an oil film or viscous substance that is difficult to remove by self-flow, resulting in gradual blockage of the flow channel and a significant decrease in heat exchange efficiency.

[0004] Currently, cleaning mainly relies on periodic shutdowns for disassembly and the use of high-pressure water guns with brushes. This method is cumbersome, involves long downtimes, and severely restricts production continuity and efficiency. Therefore, there is an urgent need for a condensation device that can be cleaned online and is easy to maintain to solve these problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a condensation device for producing polyolefin adhesives. By using a reciprocating mesh tube, the device effectively prevents the deposition layer from thickening, maintains unobstructed flow channels, greatly extends the continuous production cycle, reduces unplanned downtime, and comprehensively improves production efficiency and equipment management.

[0006] The technical solution adopted to solve the above-mentioned technical problems is: a condensation device for producing polyolefin adhesives, comprising a shell tube, a front tube box, a rear tube box, a tube bundle, a mesh tube, and a connecting plate. The tube bundle is composed of multiple straight tubes, and a mesh tube is connected inside the upper multiple straight tubes. The mesh tube can reciprocate within the corresponding straight tubes. The mesh tube is in contact with the inner wall of the corresponding straight tube. The mesh tube is made of metal wire. The connecting plate reciprocates within the front tube box and reciprocates along the axial direction of the straight tubes. The multiple mesh tubes are detachably connected to the connecting plate.

[0007] Furthermore, it also includes an intake pipe, an air valve, a high-pressure air pump, a filter box, a partition, a filter element, and a push rod. The intake pipe is connected to the front pipe box, the air valve is connected to the intake pipe, the output end of the high-pressure air pump is connected to the air valve, the filter box is connected to the outlet of the rear pipe box, the partition is vertically slidably connected to the filter box, the filter element is horizontally slidably connected to the filter box, the push rod slides through the filter box and is fixedly connected to the filter element, and the push rod is slidably connected to the filter box.

[0008] Furthermore, it also includes multiple connectors, multiple threaded sleeves, and multiple studs. The multiple connectors are fixedly connected to the mesh tube one by one. The upper and lower sides of the connectors are hollowed out. The multiple threaded sleeves are rotatably connected to the connectors one by one. The multiple studs are corresponding to the threaded sleeves one by one. The threaded sleeves are screwed to the corresponding studs. The studs are all fixedly connected to the connecting plate.

[0009] Furthermore, it also includes a motor, a rotating shaft, a gear set, a balance wheel, a swing arm, and a reciprocating rod. The motor is connected to the outer wall of the front tube box, the rotating shaft passes through the front tube box and the two are rotatably connected, the gear set links the output shaft of the motor with the rotating shaft, the balance wheel is coaxially fixed to the rotating shaft and is located inside the front tube box, one end of the swing arm is eccentrically hinged to the balance wheel, the reciprocating rod is hinged to the other end of the swing arm and is fixedly connected to the connecting plate.

[0010] Furthermore, it also includes a bracket and roller assembly, the bracket being connected inside the front tube box, the roller assembly being rotatably connected to the bracket, and the reciprocating rod being restricted to the inner side of the roller assembly for reciprocating motion.

[0011] The beneficial effects of this invention are as follows: This invention only sets a mesh tube in the upper straight tube, which precisely corresponds to the upper tube bundle area where it is easy to adhere and accumulate. This avoids the unnecessary structural complexity caused by cleaning the entire tube bundle. The mesh tube is made of metal wire and fits into the tube wall. Its reciprocating motion can continuously physically scrape and shear the viscous oil film and resin deposits attached to the tube wall, effectively preventing the deposition layer from thickening, keeping the flow channel unobstructed, greatly extending the continuous production cycle, reducing unplanned downtime, and comprehensively improving production efficiency and equipment management level. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 This is a schematic diagram of the internal structure of the shell tube of the present invention.

[0014] Figure 3 Schematic diagram of the connector position of the present invention Figure 1 .

[0015] Figure 4Schematic diagram of the connector position of the present invention Figure 2 .

[0016] Figure 5 This is a schematic diagram of the filter element position according to the present invention.

[0017] Reference numerals: 1. Shell tube; 2. Front tube box; 3. Rear tube box; 4. Tube bundle; 5. Straight tube; 6. Mesh tube; 7. Connecting plate; 8. Air inlet pipe; 9. Air valve; 10. High-pressure air pump; 11. Filter box; 12. Partition plate; 13. Filter element; 14. Push rod; 15. Connector; 16. Screw sleeve; 17. Stud; 18. Motor; 19. Rotating shaft; 20. Gear set; 21. Balance wheel; 22. Balance rod; 23. Reciprocating rod; 24. Support; 25. Roller assembly. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] like Figures 1-5 As shown, this embodiment provides a condensation device for producing polyolefin adhesives, including a shell tube 1, a front tube box 2, a rear tube box 3, a tube bundle 4, a mesh tube 6, and a connecting plate 7. The tube bundle 4 is composed of multiple straight tubes 5, and the mesh tubes 6 are connected inside the multiple straight tubes 5 on the upper side. The mesh tubes 6 can reciprocate in the corresponding straight tubes 5. The mesh tubes 6 are attached to the inner wall of the corresponding straight tubes 5. The mesh tubes 6 are made of metal wire. The connecting plate 7 reciprocates in the front tube box 2. The connecting plate 7 reciprocates along the axial direction of the straight tubes 5. The multiple mesh tubes 6 are detachably connected to the connecting plate 7.

[0020] In the above embodiments, since the high-temperature, high-flow-rate mixed gas has the highest flow rate when it first enters the tube box, the viscous aerosols and droplets it contains have the greatest inertia and will violently impact the upper pipe. Therefore, the upper and middle pipes are prone to blockage. Only the upper straight pipe 5 is equipped with a mesh tube 6, which precisely corresponds to the upper tube bundle 4 area where it is easy to adhere and accumulate. This avoids the unnecessary structural complexity caused by cleaning the entire tube bundle 4. The mesh tube 6 is made of metal wire and fits the tube wall. Its reciprocating motion can continuously physically scrape and shear the viscous oil film and resin deposits attached to the tube wall, effectively preventing the deposition layer from thickening, keeping the flow channel unobstructed, greatly extending the continuous production cycle, reducing unplanned downtime, and comprehensively improving production efficiency and equipment management level.

[0021] Specifically, it also includes an intake pipe 8, an air valve 9, a high-pressure air pump 10, a filter box 11, a partition 12, a filter element 13, and a push rod 14. The intake pipe 8 is connected to the front pipe box 2, the air valve 9 is connected to the intake pipe 8, the output end of the high-pressure air pump 10 is connected to the air valve 9, the filter box 11 is connected to the outlet of the rear pipe box 3, the partition 12 is vertically slidably connected inside the filter box 11, the filter element 13 is horizontally slidably connected inside the filter box 11, and the push rod 14 slides through the filter box 11 and is fixedly connected to the filter element 13. The push rod 14 is slidably connected to the filter box 11.

[0022] In the above embodiments, after the attachments are loosened by the mechanical scraping of the mesh tube 6, the high-pressure air pump 10 injects high-pressure gas into the front tube box 2 and the straight tube 5 through the air inlet pipe 8. This airflow can completely blow away the scraped and loosened particles and viscous substances from the tube wall and transport them backward, realizing a synergistic cleaning mode of "mechanical scraping + airflow stripping", which effectively improves cleaning efficiency. A filter box 11 is connected in series at the condenser outlet, and a horizontally movable filter element 13 is installed inside. When the gas-solid mixture blown out passes through the filter element 13, solid impurities are effectively intercepted, preventing them from being directly discharged, thus achieving a centralized collection effect of pollutants. The filter box 11 is equipped with a partition 12 that can slide up and down. During normal condensation, the partition 12 is lowered, and the gas passes directly through. In the cleaning mode, the partition 12 is raised, and at the same time, the push rod 14 is pushed to move the filter element 13 to the front of the outlet, forming an effective filtration barrier. This design realizes a rapid and sealed switching between the cleaning state and the production state, ensuring the continuity of the process. The push rod 14 can also be externally connected to an electric drive mechanism to realize automatic movement.

[0023] Specifically, it also includes multiple connectors 15, multiple threaded sleeves 16, and multiple studs 17. The multiple connectors 15 are fixedly connected to the mesh tube 6 one by one. The upper and lower sides of the connectors 15 are hollowed out. The multiple threaded sleeves 16 are rotatably connected to the connectors 15 one by one. The multiple studs 17 are corresponding to the threaded sleeves 16 one by one. The threaded sleeves 16 are screwed to the corresponding studs 17. The studs 17 are all fixedly connected to the connecting plate 7.

[0024] In the above embodiments, when the mesh tube 6 needs to be completely removed for deep cleaning or replacement, it can be detached from the connecting plate 7 simply by rotating the screw sleeve 16. This quick and detachable connection design greatly simplifies the process of regular major maintenance and reduces labor intensity. The connector 15 adopts an upper and lower hollow design, which minimizes its obstruction to gas flow in the condensation working state, ensures the normal mass and heat transfer efficiency of the heat exchange tube, and ensures that the existence of the cleaning mechanism does not affect the main condensation function.

[0025] Specifically, it also includes a motor 18, a rotating shaft 19, a gear set 20, a balance wheel 21, a swing rod 22, and a reciprocating rod 23. The motor 18 is connected to the outer wall of the front tube box 2, the rotating shaft 19 passes through the front tube box 2 and the two are rotatably connected, the gear set 20 links the output shaft of the motor 18 with the rotating shaft 19, the balance wheel 21 is coaxially fixed to the rotating shaft 19 and is located inside the front tube box 2, one end of the swing rod 22 is eccentrically hinged to the balance wheel 21, the reciprocating rod 23 is hinged to the other end of the swing rod 22, and the reciprocating rod 23 is fixedly connected to the connecting plate 7.

[0026] In the above embodiments, the motor 18 drives the gear set 20 to rotate, which in turn drives the balance wheel 21 to rotate. The balance wheel 21 drives the swing rod 22 to move, which in turn causes the reciprocating rod 23 to reciprocate.

[0027] Specifically, it also includes a bracket 24 and a roller assembly 25. The bracket 24 is connected inside the front tube box 2, and the roller assembly 25 is rotatably connected to the bracket 24. The reciprocating rod 23 is restricted to the inside of the roller assembly 25 to perform reciprocating motion.

[0028] In the above embodiments, the roller assembly 25 is used to constrain and guide the reciprocating rod 23. Unlike the traditional slider guide groove, this design greatly reduces the frictional resistance of motion, avoids jamming in humid or potentially polluted environments, and the roller structure is less prone to accumulating dirt, making it easier to clean and more reliable in operation. The roller assembly 25 and the reciprocating rod 23 work closely together, so that the reciprocating rod 23 can only move back and forth. The rollers of the roller assembly 25 adopt the "U" shaped groove or "V" shaped groove type.

[0029] It should be noted that the number of mesh tubes 6 is adjusted according to the actual situation. For clarity, the attached diagram only shows one mesh tube 6 and part of the straight tube 5. The length of the mesh tube 6 matches the length of the straight tube 5. The attached diagram only shows part of the mesh tube 6.

[0030] The working principle of this invention is as follows: Normal condensation production: When the unit performs the condensation function, the cleaning system is on standby, the high-pressure air pump 10 and the drive motor 18 are both in a stopped state, the baffle 12 in the filter box 11 moves down to ensure that the outlet of the rear tube box 3 is unobstructed, the inlet of the front tube box 2 is opened, the volatile gas flows through the tube bundle 4 to complete the condensation, and the liquid components are discharged. When cleaning is required: the device switches to the cleaning state in sequence, pulls up the partition 12 in the filter box 11, pushes the push rod 14, so that the filter element 13 moves horizontally to the top of the outlet of the rear tube box 3 to form a filter interception, closes the inlet air valve 9 of the front tube box 2 to isolate the tube box from the air inlet pipe 8, starts the motor 18, and the power is transmitted to the rotating shaft 19 through the gear set 20, which drives the swing wheel 21 to rotate. The swing wheel 21 converts the rotational motion into the linear reciprocating motion of the reciprocating rod 23 through the eccentrically hinged swing rod 22. The roller set 25 guides and limits the reciprocating rod 23 to ensure its movement trajectory is accurate. The reciprocating rod 23 drives the connecting plate 7, and then drives all the mesh tubes 6 through the stud 17, the screw sleeve 16 and the connector 15 to make axial reciprocating motion in each target straight tube 5. The mesh tubes 6 are attached to the tube wall and mechanically scrape off the attached and accumulated viscous substances, making them loose and peel off. Keep the mesh tube 6 in reciprocating motion, open the air valve 9 connected to the high-pressure air pump 10, and the high-pressure gas is injected into the front tube box 2 and flows into each straight tube 5, which completely blows away the loosened residue from the tube wall and transports it backward. When the airflow carrying impurities reaches the outlet of the rear tube box 3, it is filtered by the filter element 13 in the interception position. The impurities are captured by the filter element 13, and the clean gas passes through the filter element 13 and is discharged, completing the closed cleaning. For deep maintenance: When thorough cleaning or component replacement is required, the front tube box 2 and the rear tube box 3 can be disassembled, all the mesh tubes 6 can be pulled out as a whole, and the individual mesh tubes 6 can be quickly removed from the connecting plate 7 by rotating the screw sleeve 16, which facilitates deep cleaning.

[0031] Through the aforementioned mechanism, efficient online cleaning of the easily clogged tube bundle 4 can be achieved without shutting down the machine or disassembling the main condenser, significantly improving the continuous operation capability and maintenance convenience of the equipment.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A condenser for producing polyolefin adhesives, comprising a shell and tube (1), a front tube box (2), a rear tube box (3), and a tube bundle (4), wherein the tube bundle (4) is composed of a plurality of straight tubes (5), characterized in that, Also includes: Mesh tube (6), with mesh tube (6) connected inside multiple straight tubes (5) on the upper side, the mesh tube (6) can reciprocate in the corresponding straight tube (5), and the mesh tube (6) is in contact with the inner wall of the corresponding straight tube (5); The mesh tube (6) is made of metal wire; The connecting plate (7) reciprocates within the front tube box (2), and the connecting plate (7) reciprocates axially along the straight tube (5); The plurality of the mesh tubes (6) are detachably connected to the connecting plate (7).

2. A condensation apparatus for producing polyolefin adhesives according to claim 1, characterized in that, Also includes: The intake pipe (8) is connected to the front pipe box (2); Air valve (9) is connected to the air inlet pipe (8); A high-pressure air pump (10) is connected to the air valve (9) at its output end; The filter box (11) is connected to the outlet of the rear pipe box (3); The partition (12) is vertically slidably connected inside the filter box (11); The filter element (13) is horizontally slidably connected inside the filter box (11); The push rod (14) slides through the filter box (11) and is fixedly connected to the filter element (13). The push rod (14) is slidably connected to the filter box (11).

3. A condensation apparatus for producing polyolefin adhesives according to claim 1, characterized in that, Also includes: Multiple connectors (15) are fixedly connected to the mesh tube (6) one by one, and the connectors (15) are hollowed out on both the upper and lower sides; Multiple threaded sleeves (16) are rotatably connected to the connectors (15) one by one; Multiple studs (17) correspond one-to-one with the threaded sleeves (16), and the threaded sleeves (16) are screwed to the corresponding studs (17); All studs (17) are fixedly connected to the connecting plate (7).

4. A condensation apparatus for producing polyolefin adhesives according to claim 1, characterized in that, Also includes: The motor (18) is connected to the outer wall of the front tube box (2); A rotating shaft (19) passes through the front tube box (2) and the two are rotatably connected; The gear set (20) links the output shaft of the motor (18) with the rotating shaft (19); The balance wheel (21) is coaxially fixed to the rotating shaft (19), and the balance wheel (21) is located inside the front tube box (2); One end of the swing arm (22) is eccentrically hinged to the balance wheel (21); The reciprocating rod (23) is hinged to the other end of the swing rod (22), and the reciprocating rod (23) is fixedly connected to the connecting plate (7).

5. A condensation apparatus for producing polyolefin adhesives according to claim 4, characterized in that, Also includes: The bracket (24) is connected to the front tube box (2); The roller assembly (25) is rotatably connected to the bracket (24); The reciprocating rod (23) is restricted to reciprocating motion inside the roller assembly (25).

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