A multi-stage thin film evaporator for removing low boilers from polyether

Abstract

The application discloses a kind of multistage thin film evaporators for removing low-boiling substance in polyether, it is related to evaporator technical field, including evaporator body, feed inlet, discharge port and differential mechanism, the feed inlet is fixedly connected with the upper right end of the evaporator body, the discharge port is fixedly connected with the upper front end of the evaporator body, the differential mechanism is fixedly connected with the top of the evaporator body, setting differential mechanism, through the differential motion between vibration mechanism, two groups of second adjusting mechanism and scraper, strong shear force is generated in early stage, polyether molecular chain winding is quickly broken, and low-boiling substance is accelerated to escape, degradation of product is avoided in later stage to avoid excessive shearing, maintain uniform film to promote deep devolatilization, to realize the best balance of efficiency and quality, break through the technical limitations of traditional fixed speed.

Description

Technical Field

[0001] This invention relates to the field of evaporator technology, specifically a multi-stage thin-film evaporator for removing low-boiling substances from polyethers. Background Technology

[0002] The multi-stage thin-film evaporator for removing low-boiling-point substances from polyether is a highly efficient separation device. Its core principle is to use high vacuum and heated surfaces to form an extremely thin liquid film in the polyether melt under the action of mechanical scrapers, thereby providing a huge evaporation surface area for low-boiling-point substances. These volatile components are rapidly evaporated and separated, and then removed through the vacuum system.

[0003] Existing technologies, during use, struggle to generate strong shear forces to quickly break the entanglement of polyether molecular chains and accelerate the escape of low-boiling-point substances. Simultaneously, they are difficult to avoid excessive shearing leading to product degradation and to maintain a uniform film to promote deep devolatilization. Therefore, achieving the optimal balance between efficiency and quality is challenging, and these technologies also overcome the limitations of traditional fixed-speed technology. Furthermore, existing technologies struggle to compensate for scraper wear in real time, maintain optimal liquid film thickness, and adapt to low-viscosity polyethers, assist in material dispersion, prevent splashing, and reduce material residue.

[0004] In conclusion, existing technologies struggle to create vortex flow fields to extend material residence time and enhance mass transfer. Furthermore, some devices find it difficult to precisely control liquid film distribution through curved surface structures to avoid dry walls, making it challenging to adapt to the evaporation requirements of materials with varying viscosities. This hinders the intelligent transition from impact scraping to deep devolatilization, resulting in poor separation efficiency in the high-viscosity stage. Existing technologies also struggle to address the devolatilization problem of high-viscosity materials through precise high-frequency micro-oscillations, making it difficult to effectively disrupt the stagnant boundary layer and enhance diffusion mass transfer of low-boiling-point substances. Additionally, some devices struggle to handle the risk of coking in different areas, making it difficult to achieve adaptive scale inhibition and synergistic optimization with deep devolatilization, thus limiting their practical applicability. Summary of the Invention

[0005] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a multi-stage thin-film evaporator for removing low-boiling substances from polyethers.

[0006] The present invention is implemented as follows: a multi-stage thin-film evaporator for removing low-boiling substances from polyether is constructed. The device includes an evaporator body, an inlet fixedly connected to the upper right end of the evaporator body, an outlet fixedly connected to the upper front end of the evaporator body, and a differential speed mechanism fixedly connected to the top of the evaporator body.

[0007] The differential mechanism includes a first mounting box. The first mounting box is fixedly connected to the top of the evaporator body. A first motor is fixedly connected to the front end of the top of the first mounting box. A first gear is fixedly connected to the bottom output shaft of the first motor. A second gear meshes with the back of the first gear. A third gear is fixedly connected to the bottom of the first gear through a gear rod. A fourth gear meshes with the back of the third gear. A mounting rod is fixedly connected to the bottom of the fourth gear. A scraper is fixedly connected to the outer wall of the mounting rod. A first adjustment mechanism is fixedly connected to the upper part of the outer wall of the scraper. A first connecting rod is fixedly connected to the bottom of the second gear. The outer wall of the first connecting rod is in frictional contact with a friction block. A second connecting rod is provided below the first connecting rod. A second adjustment mechanism is fixedly connected to the bottom of both the second and first connecting rods. Vibration mechanisms are fixedly connected to the upper and lower sides of both ends of the second connecting rod.

[0008] Preferably, the first adjustment mechanism includes a first airbag, six sets of first airbags are fixedly connected to the upper part of the outer wall of the scraper, a high-performance polytetrafluoroethylene composite layer is adhesively connected to the top of the first airbag, a piston cylinder is fixedly connected to the bottom of the mounting rod, three sets of connecting pipes are fixedly connected to both the left and right ends of the piston cylinder, a solenoid valve is fixedly connected to the delivery port of the connecting pipe, the top of the piston cylinder is slidably connected to the outer wall of the piston rod, eight sets of first electromagnetic blocks are fixedly connected to the upper part of the mounting rod, and the first electromagnetic blocks are electrically connected to an external current output device, and a first sealing plug is sealed above the front end of the piston cylinder.

[0009] Preferably, the second adjustment mechanism includes a second mounting box. The bottom of both the second connecting rod and the first connecting rod are fixedly connected to the second mounting box. A mounting plate is fixedly connected to the bottom of the second mounting box. A second motor is fixedly connected to the back of the mounting plate. A rotating block is fixedly connected to the output shaft at the front end of the second motor. A first swing rod is rotatably connected to the right side of the front end and the left side of the back of the rotating block. A second electromagnetic block is fixedly connected to the outside of the first swing rod. The outer wall of the second electromagnetic block is slidably connected to a first limiting rod. The outer wall of the first limiting rod is slidably connected to a second limiting rod. A curved block is fixedly connected to the outside of the first limiting rod. A first sliding groove is provided at both the left and right ends of the second mounting box. A second airbag is fixedly connected to the upper and lower sides of the first sliding groove. A second sealing plug is sealed to the outside of the second airbag.

[0010] Preferably, the vibration mechanism includes a third mounting box. The upper and lower sides of both ends of the second connecting rod are fixedly connected to the third mounting box. The right side of the rear end of the third mounting box is provided with a second sliding groove. Eleven sets of third electromagnetic blocks are fixedly connected in the second sliding groove. The third electromagnetic blocks are magnetically attracted to the inner gear plate of the gear plate component. The gear inside the gear plate component is fixedly connected to a turntable through its bottom gear rod. A protruding rod is eccentrically provided on the top of the turntable. The outer wall of the protruding rod is intermittently engaged with the grooved wheel. The front end of the top of the grooved wheel is rotatably connected to a second swing rod. The bottom left end of the second swing rod is rotatably connected to a sliding block, and the bottom of the sliding block is slidably connected to the bottom of the third mounting box. The left end of the sliding block is magnetically attracted to a fourth electromagnetic block. There are two sets of fourth electromagnetic blocks, which are fixedly connected to the bottom and right end of the micro vibrator, respectively.

[0011] Preferably, the first connecting rod passes through the mounting rod and is slidably connected to its interior, and a second connecting rod is fixedly connected to the bottom of the second adjusting mechanism near the first connecting rod.

[0012] Preferably, the bottoms of the third gear and the fourth gear are rotatably connected to the bottom of the first mounting box, and the mounting rod passes through the bottom of the first mounting box and the top of the evaporator body and is rotatably connected to its interior.

[0013] Preferably, the outer side of the connecting tube is fixedly connected to the first airbag, and the piston rod is magnetically attracted to the first electromagnetic block.

[0014] Preferably, the second electromagnetic block is electrically connected to an external current output device, and the outer wall of the second electromagnetic block is magnetically attracted to the first limiting rod.

[0015] Preferably, the outer wall of the second airbag is in contact with the first limiting rod, and the back of the second limiting rod is rotatably connected to the front end of the mounting plate.

[0016] Preferably, the third and fourth electromagnetic blocks are both electrically connected to an external current output device, and the inner tooth plate of the gear tooth plate is slidably connected to the second slide groove.

[0017] The present invention has the following advantages: It provides an improved multi-stage thin-film evaporator for removing low-boiling substances from polyethers, which, compared with similar equipment, has the following improvements:

[0018] This invention discloses a multi-stage thin-film evaporator for removing low-boiling-point substances from polyethers. It incorporates a differential speed mechanism, utilizing the differential motion between a vibration mechanism, two sets of second adjustment mechanisms, and the scraper. This generates strong shear force in the early stages, rapidly breaking the polyether molecular chain entanglement and accelerating the escape of low-boiling-point substances. In the later stages, it avoids excessive shearing that could lead to product degradation, maintaining a uniform film and promoting deep devolatilization. This achieves an optimal balance between efficiency and quality, overcoming the limitations of traditional fixed-speed evaporators. A first adjustment mechanism is included, which compensates for scraper wear in real-time by inflating and deflating the first air chamber, maintaining optimal liquid film thickness. This mechanism is suitable for low-viscosity polyethers, assists in material dispersion, prevents splashing, and reduces material residue. A second adjustment mechanism is installed, which extends the material residence time and enhances mass transfer by creating a vortex flow field through the adjustment of curved blocks. At the same time, its curved structure can precisely control the liquid film distribution, avoid dry walls, and adapt to the evaporation requirements of materials with different viscosities by adjusting the angle. It realizes an intelligent transition from impact scraping to deep devolatilization, significantly improving the separation efficiency in the high viscosity stage. A vibration mechanism is set up to solve the devolatilization problem of high viscosity materials through micro vibrators, effectively destroying the stagnant boundary layer and enhancing the diffusion mass transfer of low boiling substances. By adjusting the position of the micro vibrators, the risk of coking in different areas is handled, realizing adaptive scale inhibition and synergistic optimization with deep devolatilization, breaking through the efficiency bottleneck of traditional scrapers. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the evaporator body of the present invention;

[0020] Figure 2 This is a three-dimensional exploded view of the differential mechanism of the present invention;

[0021] Figure 3 This is a three-dimensional exploded view of the first adjustment mechanism of the present invention;

[0022] Figure 4 This is the present invention. Figure 3 Enlarged structural diagram at point A;

[0023] Figure 5 This is a three-dimensional exploded view of the second adjustment mechanism of the present invention;

[0024] Figure 6 This is a three-dimensional exploded view of the internal structure of the second limiting rod of the present invention;

[0025] Figure 7 This is a three-dimensional exploded view of the vibration mechanism of the present invention;

[0026] Figure 8 This is the present invention. Figure 7 A magnified structural diagram at point B in the middle.

[0027] The components include: evaporator body-1, feed inlet-2, discharge outlet-3, differential mechanism-4, first mounting box-41, first motor-42, first gear-43, second gear-44, third gear-45, fourth gear-46, mounting rod-47, scraper-48, first adjusting mechanism-49, first connecting rod-410, friction block-411, second connecting rod-412, second adjusting mechanism-413, vibration mechanism-414, first airbag-491, high-performance polytetrafluoroethylene composite layer-492, piston cylinder-493, connecting pipe-494, solenoid valve-495, piston rod-496, first solenoid block-497, first sealing plug-498, and second mounting box. -4131, Mounting plate -4132, Second motor -4133, Rotating block -4134, First swing rod -4135, Second electromagnetic block -4136, First limiting rod -4137, Second limiting rod -4138, Curved block -4139, First slide groove -41310, Second airbag -41311, Second sealing plug -41312, Third mounting box -4141, Second slide groove -4142, Third electromagnetic block -4143, Gear tooth plate -4144, Turntable -4145, Protruding rod -4146, Grooved wheel -4147, Second swing rod -4148, Sliding block -4149, Fourth electromagnetic block -41410, Miniature vibrator -41411. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-8 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0031] Example 1:

[0032] Please see Figures 1-2 The present invention provides a multi-stage thin-film evaporator for removing low-boiling substances from polyether, comprising an evaporator body 1, a feed inlet 2 fixedly connected to the upper right end of the evaporator body 1, an outlet 3 fixedly connected to the upper front end of the evaporator body 1, a differential speed mechanism 4 fixedly connected to the top of the evaporator body 1, and an outlet 3 connected to an external condenser.

[0033] The differential mechanism 4 includes a first mounting box 41. The first mounting box 41 is fixedly connected to the top of the evaporator body 1. The first motor 42 is fixedly connected to the front end of the top of the first mounting box 41. The first gear 43 is fixedly connected to the bottom output shaft of the first motor 42. The first mounting box 41 facilitates the installation and fixing of the first motor 42.

[0034] The back of the first gear 43 is engaged with the second gear 44. The bottom of the first gear 43 is fixedly connected to the third gear 45 via a gear rod. The back of the third gear 45 is engaged with the fourth gear 46. The bottom of the fourth gear 46 is fixedly connected to the mounting rod 47, which facilitates the rotation of the mounting rod 47.

[0035] A scraper 48 is fixedly connected to the outer wall of the mounting rod 47. A first adjusting mechanism 49 is fixedly connected to the upper part of the outer wall of the scraper 48. A first connecting rod 410 is fixedly connected to the bottom of the second gear 44. The outer wall of the first connecting rod 410 is in frictional contact with the friction block 411. A second connecting rod 412 is provided below the first connecting rod 410. The second connecting rod 412 facilitates the rotation of the second adjusting mechanism 413 at its bottom and synchronously drives the four sets of vibration mechanisms 414 to rotate.

[0036] The bottom of both the second connecting rod 412 and the first connecting rod 410 are fixedly connected to the second adjusting mechanism 413. The upper and lower sides of the left and right ends of the second connecting rod 412 are fixedly connected to the vibration mechanism 414. The first connecting rod 410 passes through the mounting rod 47 and is slidably connected to its interior. The mounting rod 47 facilitates the rotation of the scraper 48.

[0037] The bottom of the second adjusting mechanism 413 near the first connecting rod 410 is fixedly connected to the second connecting rod 412. The bottoms of the third gear 45 and the fourth gear 46 are rotatably connected to the bottom of the first mounting box 41. The mounting rod 47 passes through the bottom of the first mounting box 41 and the top of the evaporator body 1 and is rotatably connected to its interior.

[0038] The working principle of a multi-stage thin-film evaporator for removing low-boiling substances from polyether, based on Example 1, is as follows:

[0039] First, when using this device, place it in the work area, and then connect it to an external power source to provide the power required for its operation.

[0040] Second, the staff conveys the material from the feed inlet 2 into the evaporator body 1, and then starts the first motor 42. The first motor 42 drives the first gear 43 to rotate, the first gear 43 drives the second gear 44 to rotate, the second gear 44 drives the first connecting rod 410 to rotate, the first connecting rod 410 drives the second adjusting mechanism 413 at its bottom to rotate, the second adjusting mechanism 413 drives the second connecting rod 412 to rotate, and the second connecting rod 412 drives the second adjusting mechanism 413 at its bottom to rotate, simultaneously driving the four sets of vibration mechanisms 414 to rotate. This causes the vibration mechanisms 414 and the two sets of second adjusting mechanisms 413 to perform decelerated rotational motion. At the same time, the rotational speed can be further reduced by replacing the friction blocks 411 with different friction coefficients. During the rotation of the first gear 43, the third gear 45 drives the third gear 45 to rotate through its bottom gear rod, the third gear 45 drives the fourth gear 46 to rotate, the fourth gear 46 drives the mounting rod 47 to rotate, and the mounting rod 47 drives the scraper 48 to rotate, causing the scraper 48 to perform accelerated rotational motion, thereby driving the vibration mechanism 414 to rotate. 14. The differential speed movement between the two sets of second adjustment mechanisms 413 and scraper 48 generates strong shear force in the early stage, quickly breaking the polyether molecular chain entanglement and accelerating the escape of low-boiling substances. In the later stage, it avoids excessive shearing that leads to product degradation, maintains a uniform film and promotes deep volatilization, thereby achieving the best balance between efficiency and quality. This breaks through the technical limitations of traditional fixed speed. At the same time, through the synchronous high-speed rotation of vibration mechanism 414, two sets of second adjustment mechanisms 413 and scraper 48, the vibration mechanism 414, two sets of second adjustment mechanisms 413 and scraper 48 scrape the dispersed material into an extremely thin film inside the evaporator body 1 under the action of centrifugal force. Then, the operator introduces a heating medium to the outside of the evaporator body 1 through external heating equipment. The film inside the evaporator body 1 is heated by heat transfer. After the material is heated, the volatile components in it quickly vaporize, and the formed steam flows upward and enters the external condenser through the outlet 3, where it is condensed into liquid and collected. The non-volatile components flow downward along the heating tube wall and are finally discharged from the bottom of the evaporator body 1.

[0041] Example 2:

[0042] Please see Figures 3-4 The present invention provides a multi-stage thin-film evaporator for removing low-boiling substances from polyether. Compared with Embodiment 1, this embodiment further includes: a first adjustment mechanism 49, which includes a first airbag 491. Six sets of first airbags 491 are fixedly connected to the upper part of the outer wall of the scraper 48. A high-performance polytetrafluoroethylene composite layer 492 is adhesively connected to the top of the first airbag 491. The high-performance polytetrafluoroethylene composite layer 492 facilitates the improvement of the wear resistance and high temperature resistance of the first airbag 491.

[0043] A piston cylinder 493 is fixedly connected to the bottom of the mounting rod 47. Three sets of connecting pipes 494 are fixedly connected to both ends of the piston cylinder 493. A solenoid valve 495 is fixedly connected to the delivery port of the connecting pipe 494. The top of the piston cylinder 493 is slidably connected to the outer wall of the piston rod 496. The connecting pipe 494 facilitates the delivery of gas.

[0044] Eight sets of first electromagnetic blocks 497 are fixedly connected to the upper part of the mounting rod 47, and the first electromagnetic blocks 497 are electrically connected to the external current output device. A first sealing plug 498 is sealed above the front end of the piston cylinder 493. The outer side of the connecting pipe 494 is fixedly connected to the first airbag 491. The piston rod 496 is magnetically attracted to the first electromagnetic blocks 497.

[0045] In this embodiment:

[0046] When the first airbag 491 needs to be inflated, the operator first introduces pure gas into the piston cylinder 493 and seals the piston cylinder 493 with the first sealing plug 498. Then, the six sets of solenoid valves 495 are activated, and the eight sets of first electromagnetic blocks 497 are driven by an external current output device. This causes the piston rod 496 to move downward under the magnetic attraction of the eight sets of first electromagnetic blocks 497. The piston rod 496 then transports the pure gas in the piston cylinder 493 to the first airbag 491 through the connecting pipe 494, thus achieving inflation. Inflating the first airbag 491 is the opposite of inflating it. Instead, the gas in the piston cylinder 493 is vented beforehand. The piston rod 496 is moved upward by the magnetic attraction of the eight sets of first electromagnetic blocks 497, so that the gas in the first airbag 491 enters the piston cylinder 493 through the connecting pipe 494, thus completing the deflating of the first airbag 491. By inflating and deflating the first airbag 491, the wear of the scraper 48 is compensated in real time, the optimal liquid film thickness is maintained, and it is suitable for low-viscosity polyether, assists in the dispersion of materials, avoids splashing, and reduces material residue.

[0047] Example 3:

[0048] Please see Figures 5-6The present invention provides a multi-stage thin-film evaporator for removing low-boiling substances from polyethers. Compared with Embodiment 1, this embodiment further includes: a second adjustment mechanism 413. The second adjustment mechanism 413 includes a second mounting box 4131. The bottom of the second connecting rod 412 and the first connecting rod 410 are both fixedly connected to the second mounting box 4131. The bottom of the second mounting box 4131 is fixedly connected to a mounting plate 4132. The back of the mounting plate 4132 is fixedly connected to a second motor 4133. The mounting plate 4132 facilitates the installation and fixing of the second motor 4133.

[0049] The front output shaft of the second motor 4133 is fixedly connected to a rotating block 4134. The right front side and the left back side of the rotating block 4134 are rotatably connected to a first swing rod 4135. The outer side of the first swing rod 4135 is fixedly connected to a second electromagnetic block 4136. The outer wall of the second electromagnetic block 4136 is slidably connected to a first limiting rod 4137. The outer wall of the first limiting rod 4137 is slidably connected to a second limiting rod 4138. The rotating block 4134 facilitates the swinging of the first swing rod 4135.

[0050] A curved block 4139 is fixedly connected to the outer side of the first limiting rod 4137. The second mounting box 4131 is provided with a first sliding groove 41310 at both the left and right ends. A second airbag 41311 is fixedly connected to the upper and lower sides of the first sliding groove 41310. A second sealing plug 41312 is sealed to the outer side of the second airbag 41311. The second sealing plug 41312 facilitates sealing of the second airbag 41311.

[0051] The second electromagnetic block 4136 is electrically connected to the external current output device. The outer wall of the second electromagnetic block 4136 is magnetically attracted to the first limiting rod 4137. The outer wall of the second airbag 41311 is in contact with the first limiting rod 4137. The back of the second limiting rod 4138 is rotatably connected to the front end of the mounting plate 4132.

[0052] In this embodiment:

[0053] When the angle of the curved block 4139 needs to be adjusted, the second motor 4133 is started. The second motor 4133 drives the rotating block 4134 to rotate. The rotating block 4134, through its rotational connection with the two sets of first swing rods 4135, drives the first swing rods 4135 to swing. The first swing rods 4135 drive the first limit rods 4137 and the second limit rods 4138 to swing. The first limit rods 4137 drive the curved block 4139 to swing, thus completing the angle adjustment of the curved block 4139. When the length of the curved block 4139 needs to be adjusted, the second electromagnetic block 4136 is activated by an external current output device, causing the second electromagnetic block 4136 to magnetically attract the first limit rod 4137. When the rotating block 4134 drives the first swing rods 4135 to swing, the first swing rods 4135 drive the second electromagnetic block 4136 to swing and move to the left or right. The second electromagnetic block 4136, through magnetic adsorption with the first limiting rod 4137, drives the first limiting rod 4137 to move left or right within the second limiting rod 4138. The first limiting rod 4137 drives the curved block 4139 to move left or right, thereby adjusting the length of the curved block 4139. After the angle and length of the curved block 4139 are adjusted, the second airbag 41311 is inflated by external equipment and sealed by the second sealing plug 41312 to maintain the airtightness of the second mounting box 4131. The adjustment of the curved block 4139 forms a vortex flow field to extend the material residence time and enhance mass transfer. At the same time, its curved structure can accurately control the liquid film distribution, avoid dry walls, and adapt to the evaporation requirements of materials with different viscosities by adjusting the angle, realizing an intelligent transition from impact scraping to deep devolatilization, significantly improving the separation efficiency in the high viscosity stage.

[0054] Example 4:

[0055] Please see Figures 7-8 The present invention provides a multi-stage thin-film evaporator for removing low-boiling substances from polyether. Compared with Embodiment 1, this embodiment further includes a vibration mechanism 414. The vibration mechanism 414 includes a third mounting box 4141. The upper and lower sides of the left and right ends of the second connecting rod 412 are fixedly connected to the third mounting box 4141. The right side of the rear end of the third mounting box 4141 is provided with a second sliding groove 4142. Eleven sets of third electromagnetic blocks 4143 are fixedly connected in the second sliding groove 4142. The second sliding groove 4142 facilitates the installation and fixation of the third electromagnetic blocks 4143.

[0056] The third electromagnetic block 4143 is magnetically attracted to the inner gear plate of the gear plate 4144. The gear inside the gear plate 4144 is fixedly connected to the turntable 4145 through its bottom gear rod. The top of the turntable 4145 is eccentrically provided with a protruding rod 4146. The outer wall of the protruding rod 4146 is intermittently engaged with the grooved wheel 4147. The turntable 4145 can easily drive the protruding rod 4146 to make circular motion.

[0057] The top front end of the grooved wheel 4147 is rotatably connected to the second swing rod 4148. The bottom left end of the second swing rod 4148 is rotatably connected to the sliding block 4149, and the bottom of the sliding block 4149 is slidably connected to the bottom of the third mounting box 4141. The left end of the sliding block 4149 is magnetically attracted to the fourth electromagnetic block 41410. There are two sets of the fourth electromagnetic block 41410, which are fixedly connected to the bottom and right end of the micro vibrator 41411, respectively. The bottom of the micro vibrator 41411 is magnetically attracted to the bottom of the third mounting box 4141.

[0058] The third electromagnetic block 4143 and the fourth electromagnetic block 41410 are both electrically connected to the external current output device, and the inner tooth plate of the gear tooth plate 4144 is slidably connected to the second slide groove 4142.

[0059] In this embodiment:

[0060] During use, scraper 48 activates the micro vibrator 41411. Through high-frequency mechanical vibration, the vibration is transmitted to the liquid film, solving the problem of high-viscosity material devolatilization, effectively breaking down the stagnant boundary layer and enhancing the diffusion and mass transfer of low-boiling-point substances. When the position of the micro vibrator 41411 needs adjustment, an external current output device first stops the fourth electromagnetic block 41410 at the bottom of the micro vibrator 41411 and starts the fourth electromagnetic block 41410 at the right end of the micro vibrator 41411, thus... The fourth electromagnetic block 41410 on the right end of the miniature vibrator 41411 is magnetically attracted to the sliding block 4149. An external current output device then drives the eleventh set of third electromagnetic blocks 4143 to work, causing the inner gear plate of the gear plate component 4144 to move left or right due to the magnetic attraction of the eleventh set of third electromagnetic blocks 4143. The inner gear plate of the gear plate component 4144 drives the internal gear to rotate. The internal gear of the gear plate component 4144 drives the turntable 4145 to rotate via its bottom gear rod. The turntable 4145 then drives the convex rod... 4146 performs circular motion, causing the convex rod 4146 to drive the grooved wheel 4147 to rotate through intermittent engagement with the grooved wheel 4147. The grooved wheel 4147, through its rotational connection with the second swing rod 4148, drives the sliding block 4149 to move left or right. The sliding block 4149, through the fourth electromagnetic block 41410 at the right end of the micro vibrator 41411, drives the micro vibrator 41411 to move left or right. When the micro vibrator 41411 moves to the desired position, the external current output device drives the micro vibrator 41411 to move left or right. When the fourth electromagnetic block 41410 at the bottom of the micro vibrator 41411 starts working and the fourth electromagnetic block 41410 at the right end of the micro vibrator 41411 stops working, the fourth electromagnetic block 41410 at the bottom of the micro vibrator 41411 is magnetically attracted to the bottom of the third mounting box 4141. This makes it easier for the micro vibrator 41411 to transmit vibration when it is working. Furthermore, by adjusting the position of the micro vibrator 41411, the risk of coking in different areas can be dealt with, achieving adaptive scale inhibition and synergistic optimization with deep devolvation, breaking through the efficiency bottleneck of traditional scrapers.

[0061] This invention provides an improved multi-stage thin-film evaporator for removing low-boiling-point substances from polyethers. It incorporates a differential speed mechanism 4, which, through the differential motion between a vibration mechanism 414, two sets of second adjustment mechanisms 413, and a scraper 48, generates strong shear force in the early stages to rapidly break the polyether molecular chain entanglement and accelerate the escape of low-boiling-point substances. In the later stages, it avoids excessive shearing that could lead to product degradation, maintaining a uniform film and promoting deep devolatilization, thus achieving an optimal balance between efficiency and quality, overcoming the limitations of traditional fixed-speed evaporators. A first adjustment mechanism 49 is included, which, by inflating and deflating a first airbag 491, compensates for wear on the scraper 48 in real time, maintaining optimal liquid film thickness, adapting to low-viscosity polyethers, assisting in material dispersion, preventing splashing, and reducing material residue. A second adjustment mechanism 413 is installed, which extends the material residence time and enhances mass transfer by adjusting the curved block 4139 to form a vortex flow field. At the same time, its curved structure can accurately control the liquid film distribution, avoid dry walls, and adapt to the evaporation requirements of materials with different viscosities by adjusting the angle, realizing an intelligent transition from impact scraping to deep devolatilization, significantly improving the separation efficiency of the high viscosity stage. A vibration mechanism 414 is set up, which solves the problem of high viscosity material devolatilization by using a micro vibrator 41411, effectively destroying the stagnant boundary layer and enhancing the diffusion mass transfer of low boiling substances. By adjusting the position of the micro vibrator 41411, the risk of coking in different areas is handled, realizing adaptive scale inhibition and synergistic optimization with deep devolatilization, breaking through the efficiency bottleneck of traditional scrapers.

[0062] The above description shows and illustrates the basic principles, main features, and advantages of the present invention. Standard parts used in the present invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-stage thin-film evaporator for removing low-boiling substances from polyether, comprising an evaporator body (1), wherein a feed inlet (2) is fixedly connected to the upper right end of the evaporator body (1), a discharge outlet (3) is fixedly connected to the upper front end of the evaporator body (1), and a differential speed mechanism (4) is fixedly connected to the top of the evaporator body (1). Its features are: The differential mechanism (4) includes a first mounting box (41). The top of the evaporator body (1) is fixedly connected to the first mounting box (41). The front end of the top of the first mounting box (41) is fixedly connected to a first motor (42). The bottom output shaft of the first motor (42) is fixedly connected to a first gear (43). A second gear (44) meshes with the back of the first gear (43). A third gear (45) is fixedly connected to the bottom of the first gear (43) through a gear rod. A fourth gear (46) meshes with the back of the third gear (45). A mounting rod (47) is fixedly connected to the bottom of the fourth gear (46). A scraper (48) is fixedly connected to the outer wall of the mounting rod (47). A first adjustment mechanism (49) is fixedly connected to the upper part of the outer wall of the scraper (48). A first connecting rod (410) is fixedly connected to the bottom of the second gear (44). The outer wall of the first connecting rod (410) is in frictional contact with the friction block (411). A second connecting rod (412) is provided below the first connecting rod (410). A second adjustment mechanism (413) is fixedly connected to the bottom of both the second connecting rod (412) and the first connecting rod (410). A vibration mechanism (414) is fixedly connected to the upper and lower sides of both ends of the second connecting rod (412). The vibration mechanism (414) includes a third mounting box (4141). The upper and lower sides of the left and right ends of the second connecting rod (412) are fixedly connected to the third mounting box (4141). The right side of the rear end of the third mounting box (4141) is provided with a second slide groove (4142). Eleven sets of third electromagnetic blocks (4143) are fixedly connected in the second slide groove (4142). The third electromagnetic blocks (4143) are magnetically attracted to the gear plate of the gear tooth plate (4144). The gear inside the gear tooth plate (4144) is fixedly connected to a turntable (4145) through its bottom gear rod. The top of the turntable (4145) A convex rod (4146) is eccentrically provided on the part. The outer wall of the convex rod (4146) is intermittently engaged with the grooved wheel (4147). The top front end of the grooved wheel (4147) is rotatably connected to a second swing rod (4148). The bottom left end of the second swing rod (4148) is rotatably connected to a sliding block (4149). The bottom of the sliding block (4149) is slidably connected to the bottom of the third mounting box (4141). The left end of the sliding block (4149) is magnetically attracted to a fourth electromagnetic block (41410). There are two sets of the fourth electromagnetic blocks (41410), which are fixedly connected to the bottom and right end of the micro vibrator (41411) respectively.

2. The multi-stage thin-film evaporator for removing low-boiling substances from polyethers according to claim 1, characterized in that: The first adjustment mechanism (49) includes a first airbag (491). Six sets of first airbags (491) are fixedly connected to the upper part of the outer wall of the scraper (48). A high-performance polytetrafluoroethylene composite layer (492) is glued to the top of the first airbag (491). A piston cylinder (493) is fixedly connected to the bottom of the mounting rod (47). Three sets of connecting pipes (494) are fixedly connected to both ends of the piston cylinder (493). A solenoid valve (495) is fixedly connected to the inlet of the connecting pipe (494). The top of the piston cylinder (493) is slidably connected to the outer wall of the piston rod (496). Eight sets of first electromagnetic blocks (497) are fixedly connected to the upper part of the mounting rod (47). The first electromagnetic blocks (497) are electrically connected to the external current output device. A first sealing plug (498) is sealed above the front end of the piston cylinder (493).

3. The multi-stage thin-film evaporator for removing low-boiling substances from polyethers according to claim 2, characterized in that: The second adjustment mechanism (413) includes a second mounting box (4131). The bottom of the second connecting rod (412) and the first connecting rod (410) are both fixedly connected to the second mounting box (4131). The bottom of the second mounting box (4131) is fixedly connected to a mounting plate (4132). The back of the mounting plate (4132) is fixedly connected to a second motor (4133). The front output shaft of the second motor (4133) is fixedly connected to a rotating block (4134). The right front side and the left back side of the rotating block (4134) are both rotatably connected to a first swing rod (4135). A second electromagnetic block (4136) is fixedly connected to the outside. The outer wall of the second electromagnetic block (4136) is slidably connected to the first limiting rod (4137). The outer wall of the first limiting rod (4137) is slidably connected to the second limiting rod (4138). A curved block (4139) is fixedly connected to the outside of the first limiting rod (4137). The left and right ends of the second mounting box (4131) are provided with first sliding grooves (41310). The upper and lower sides of the first sliding groove (41310) are fixedly connected to the second airbags (41311). The outside of the second airbags (41311) is sealed with a second sealing plug (41312).

4. A multi-stage thin-film evaporator for removing low-boiling substances from polyethers according to claim 3, characterized in that: The first connecting rod (410) passes through the mounting rod (47) and is slidably connected to its interior. The second adjusting mechanism (413) near the first connecting rod (410) has a second connecting rod (412) fixedly connected to its bottom.

5. A multi-stage thin-film evaporator for removing low-boiling substances from polyethers according to claim 4, characterized in that: The bottom of the third gear (45) and the fourth gear (46) are rotatably connected to the bottom of the first mounting box (41), and the mounting rod (47) passes through the bottom of the first mounting box (41) and the top of the evaporator body (1) and is rotatably connected to its interior.

6. A multi-stage thin-film evaporator for removing low-boiling substances from polyethers according to claim 5, characterized in that: The outer side of the connecting tube (494) is fixedly connected to the first airbag (491), and the piston rod (496) is magnetically attracted to the first electromagnetic block (497).

7. A multi-stage thin-film evaporator for removing low-boiling substances from polyethers according to claim 6, characterized in that: The second electromagnetic block (4136) is electrically connected to an external current output device, and the outer wall of the second electromagnetic block (4136) is magnetically attracted to the first limiting rod (4137).

8. A multi-stage thin-film evaporator for removing low-boiling substances from polyethers according to claim 7, characterized in that: The outer wall of the second airbag (41311) is in contact with the first limiting rod (4137), and the back of the second limiting rod (4138) is rotatably connected to the front end of the mounting plate (4132).

9. A multi-stage thin-film evaporator for removing low-boiling substances from polyethers according to claim 8, characterized in that: The third electromagnetic block (4143) and the fourth electromagnetic block (41410) are both electrically connected to the external current output device, and the inner tooth plate of the gear tooth plate (4144) is slidably connected to the second slide groove (4142).

Images