Polymerization reaction device

Abstract

The invention discloses a polymerization reaction device. The polymerization reaction device comprises a reaction kettle; a feed line; the stirrer extends into the reaction kettle from the bottom of the reaction kettle, and the stirrer comprises a main shaft component and a plurality of stirring paddles mounted on the main shaft component; the first flushing mechanism is arranged at the upper part of the interior of the reaction kettle and is used for spraying a cleaning solvent towards the inner wall of the reaction kettle and the stirrer; the second flushing mechanism is arranged at the lower part of the main shaft part and is positioned below the stirring paddle, the second flushing mechanism has a radial folding state and a radial expansion state which can be switched, the second flushing mechanism is switched to the folding state during polymerization reaction, and the second flushing mechanism is switched to the expansion state when cleaning is needed. The second flushing mechanism is switched to the expansion state, and after the second flushing mechanism is switched to the expansion state, the second flushing mechanism at least sprays a cleaning solvent to the bottom of the reaction kettle.

Description

Technical Field

[0001] The invention relates to a polymerization reaction device for producing PAN-based carbon fibers. Background Art

[0002] The polymerization process is a process of obtaining a polymer compound (polymer solution) through a polymerization chemical reaction of organic monomers such as propylene and ethylene. Usually, the polymerization reaction is completed in a reactor. In the reactor, the molecules in the polymer solution interact with each other to form a network connection, which causes part of the polymer solution to condense and produce an undesirable gel. The gel is very easy to adhere to the inner wall of the reactor, the bottom of the reactor (such as the discharge port), and uneven areas (such as welding areas and component docking areas). It is commonly known as glue hanging. If the gel is not cleaned in time, it may affect the uniformity of heat exchange and block related pipelines.

[0003] In the prior art, a flushing mechanism is arranged at the upper part of the reactor. After the polymerization reaction is completed and the finished product is discharged, the flushing mechanism is used to spray a cleaning solvent (such as dimethyl sulfoxide) onto the inner wall and agitator of the reactor, thereby improving the cleaning efficiency and reducing the amount of glue hanging to a certain extent.

[0004] However, the prior art method of using the upper flushing mechanism inside the reactor to spray the cleaning solvent still has the following shortcomings in removing the gel: Due to the obstruction of the paddles on the agitator, the cleaning solvent sprayed from the flushing mechanism is difficult to directly reach the lower inner wall and bottom wall of the reactor, especially the discharge port at the bottom of the reactor. However, the amount of glue hanging in these areas is the largest, but the cleaning effect of these areas is not good.

[0005] In addition, during the polymerization reaction, the polymerization liquid may enter the nozzle hole (for example, enter the nozzle hole due to evaporation), and may condense into gel and block the nozzle hole. The probability of blocking the nozzle hole is not small and cannot be ignored. Summary of the invention

[0006] In view of the above technical problems existing in the prior art, an embodiment of the present invention provides a polymerization reaction device.

[0007] In order to solve the above technical problems, the technical solution adopted in the embodiments of the present invention is: A polymerization reaction device, comprising: A reactor having a first feed inlet, a second feed inlet and a third feed inlet at the top, and a discharge port at the bottom; A feed pipeline, comprising: a first feed pipeline connected to the first feed port for feeding a plurality of monomers into the reactor, a second feed pipeline connected to the second feed port for feeding an initiator into the reactor, and a third feed pipeline connected to the third feed port for feeding a terminator into the reactor; an agitator extending from the bottom of the reactor into the reactor, the agitator comprising a main shaft component and a plurality of agitating paddles mounted on the main shaft component; A first flushing mechanism, which is arranged at an upper portion of the interior of the reactor, and is used to spray a cleaning solvent toward an inner wall of the reactor and an agitator; The second flushing mechanism is arranged at the lower part of the main shaft component and below the stirring paddle. The second flushing mechanism has a radially contracted state and a radially expanded state that can be switched. During the polymerization reaction, the second flushing mechanism is switched to the contracted state. When cleaning is required, the second flushing mechanism is switched to the expanded state. After switching to the expanded state, the second flushing mechanism at least sprays a cleaning solvent to the bottom of the reactor.

[0008] Preferably, an inner hole is opened upward from the lower end of the main shaft component so that the main shaft component is formed into a tubular structure; The second flushing mechanism comprises: A retaining component, which is disposed in the inner hole of the spindle component and can slide along the inner hole; an actuator for driving the holding member; A strip-shaped spray component, comprising a plurality of strip-shaped spray components, the ends of which are pivotally connected to the lower end of the holding component and arranged circumferentially, a torsion spring is provided at the pivoting area between each strip-shaped spray component and the holding component, and the torsion spring is used to apply an elastic force to the strip-shaped spray component to cause the strip-shaped spray component to twist outward; each strip-shaped spray component has a liquid spraying cavity located inside and a plurality of nozzles arranged on the outer surface and penetrating into the liquid spraying cavity; The interior of the holding component has a liquid supply cavity connected to a pipeline for providing a cleaning solvent, and the lower end of the holding component has a hose that enables the liquid supply cavity to be connected to the liquid spraying cavities of the plurality of strip-shaped spraying components respectively; The holding member is moved upward to force the plurality of strip-shaped spray members to pivot inward and enter the inner hole of the main shaft member, thereby switching the second flushing mechanism to a retracted state; The holding member is moved downward to push the plurality of strip-shaped spray members extending below the main shaft member, and the strip-shaped spray members are forced to pivot outward by the torsion spring, so that the second flushing mechanism is switched to the expanded state.

[0009] Preferably, A plurality of liquid supply channels are arranged in the tube wall of the main shaft component, and the plurality of liquid supply channels are arranged circumferentially; the liquid supply channels extend axially so that the upper end and the lower end of the liquid supply channels are respectively located at the upper part and the lower part of the main shaft component; The upper part of the main shaft component has a plurality of first wall holes which respectively pass through from the outer surface of the main shaft component to the upper ends of the plurality of liquid supply channels; the lower part of the main shaft component has a plurality of second wall holes which respectively pass through from the inner hole wall of the main shaft component to the lower ends of the plurality of liquid supply channels; The upper outer sleeve of the spindle component is provided with a flow guide component, the inner wall of the flow guide component is configured with a first annular groove, the first annular groove is opposite to the first wall hole, and the flow guide component is provided with a flow guide hole that is transversely connected to the first annular groove, and is used to provide a pipeline for the cleaning solvent to be connected to the flow guide hole; A second annular groove is arranged on the outer peripheral surface of the retaining component, and a flow hole penetrating to the liquid supply chamber is opened at the bottom of the second annular groove. When the retaining component moves to a position where the plurality of strip-shaped injection components extend out of the lower end of the main shaft component, the first annular groove is opposite to the second wall hole.

[0010] Preferably, a plate-shaped cover component for covering a lower port of the main shaft component is pivotally connected to the lower end of the main shaft component.

[0011] Preferably, the first flushing mechanism includes a plurality of liquid spraying pipes arranged in a ring shape and nozzles arranged on the liquid spraying pipes.

[0012] Preferably, the actuator is an electrostrictive cylinder, and a telescopic rod of the electrostrictive cylinder is connected to the upper end of the holding component.

[0013] Preferably, the polymerization reaction device further comprises a temporary storage tank; A partition is provided at the bottom of the temporary storage tank to divide the interior of the temporary storage tank into two storage chambers; wherein: Two discharge pipelines are led out from the discharge port of the reactor and extend into the two storage chambers through the top of the temporary storage tank respectively; The bottoms of the two storage chambers are each provided with a discharge port, and the two discharge ports are combined to form a delivery pipeline, and a liquid pump is arranged on the delivery pipeline.

[0014] Preferably, the branch lines for conveying different monomers are connected to the first feed line, on which a mixer is provided.

[0015] Preferably, the pipeline for supplying the cleaning solvent is divided into two branch lines for supplying the cleaning solvent to the first flushing mechanism and the second flushing mechanism respectively.

[0016] Preferably, the spindle component is driven by an electric motor or a hydraulic motor installed above the top of the reactor.

[0017] Compared with the prior art, the polymerization reaction device disclosed in the present invention has the following beneficial effects: 1. By arranging a strip-shaped spraying part capable of expansion and contraction at the lower part of the main shaft part of the agitator, it is possible to directly spray the cleaning solvent to the lower part of the inner wall and the bottom of the reactor, and it will not cause resistance to the agitator and will not be coated with glue during the polymerization reaction.

[0018] 2. The structure for providing cleaning solvent to the strip-shaped spray parts is ingeniously designed.

[0019] 3. The nozzle on the strip-shaped spraying part can effectively prevent the spray hole from being blocked by gel.

[0020] This summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the invention. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0022] Figure 1 A state view of a polymerization reaction apparatus provided by an embodiment of the present invention during a polymerization reaction.

[0023] Figure 2 for Figure 1 An enlarged view of detail A.

[0024] Figure 3 for Figure 2 BB section view.

[0025] Figure 4 for Figure 3 An enlarged view of a portion C.

[0026] Figure 5 for Figure 4 D-direction view.

[0027] Figure 6 A state view of a polymerization reaction apparatus provided by an embodiment of the present invention during gel cleaning.

[0028] Figure 7 for Figure 6 An enlarged view of detail E.

[0029] Reference numerals

[0030] 10-reactor; 11-discharge port; 21-first feed pipeline; 22-second feed pipeline; 23-third feed pipeline; 24-fourth feed pipeline; 25-mixer; 26-drainage pipeline; 27-delivery pipeline; 28-liquid pump; 30-agitator; 31-spindle component; 32-stirring paddle; 33-actuator; 40-first flushing mechanism; 50-second flushing mechanism; 51-strip spray component; 511-spray chamber; 512-spray interface; 513-ear plate; 514-radial surface; 515-circumferential surface; 516-hose; 5 2-nozzle; 521-body; 522-spray hole; 523-mouth; 524-pore; 525-cutting seam; 53-torsion spring; 54-holding component; 541-liquid supply chamber; 542-mounting groove; 543-second annular groove; 544-flow hole; 55-electrostrictive cylinder; 551-telescopic rod; 56-liquid supply channel; 561-first wall hole; 562-second wall hole; 57-flow guide component; 571-first annular groove; 572-flow guide hole; 58-brush; 59-capping component; 60-temporary storage tank; 61-partition; 62-discharge outlet. DETAILED DESCRIPTION

[0031] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0033] like Figure 1 As shown, an embodiment of the present invention discloses a polymerization reaction device, which includes: a reactor 10, a feed pipeline, an agitator 30, and a flushing system.

[0034] The top of the reactor 10 is provided with a first feed port, a second feed port, and a third feed port, and the feed pipelines include a first feed line 21, a second feed line 22, and a second feed line 23. The first feed line 21 is connected to the first feed port, so that each monomer to be subjected to polymerization reaction is supplied to the reactor 10 through the first feed line 21. Preferably, each branch line is used to transport each monomer to converge into the first feed line 21, and a mixer 25 is provided on the first feed line 21 to allow each monomer to be preliminarily mixed in the mixer 25 in advance and then supplied to the reactor 10. The second feed line 22 is connected to the second feed port, and the initiator for promoting the polymerization reaction is supplied to the reactor 10 through the second feed line 22 to participate in the polymerization reaction of the monomer. The third feed line 23 is connected to the third feed port, and the terminator for terminating the polymerization reaction is supplied to the reactor 10 through the third feed line 23 to terminate the polymerization reaction. The bottom of the reactor 10 is provided with a discharge port 11, and the product after the polymerization reaction is discharged through the discharge port 11. A sewage pipeline 26 is also led out from the discharge port 11. After the polymerization reaction is completed and the product is discharged, the flushing system flushes the reactor 10, and the flushed material (such as gel) is discharged through the sewage pipeline 26.

[0035] The agitator 30 includes a rotary driver, a main shaft component 31, and a plurality of stirring paddles 32; the main shaft component 31 extends from the top of the reactor 10 into the reactor 10, the rotary driver (for example, a motor or a hydraulic motor) is installed above the top of the reactor 10 to drive the main shaft component 31 to rotate, and the plurality of stirring paddles 32 are arranged along the axial direction and circumferential direction of the main shaft component 31 and are located in the reactor 10. After each monomer and initiator are supplied into the reactor 10, the rotary driver drives the main shaft component 31 to drive the stirring paddles 32 to rotate, thereby stirring the materials in the reactor 10 to promote the reaction and obtain uniform materials.

[0036] In the present invention, the flushing system includes two flushing mechanisms, namely, a first flushing mechanism 40 and a second flushing mechanism 50. The first flushing mechanism 40 is arranged at the upper part of the interior of the reactor 10 and is located above the stirring paddle 32. The second flushing mechanism 50 is arranged at the lower part of the main shaft component 31 and is located below the stirring paddle 32. The fourth feed pipeline 24 passes through the top of the reactor 10 and is divided into two branches to provide cleaning solvent to the first flushing mechanism 40 and the second flushing mechanism 50 respectively. The first flushing mechanism 40 is used to spray the cleaning solvent toward the inner wall of the reactor 10 and the agitator 30 (including the main shaft component 31 and each stirring paddle 32). In order to maximize the spraying range, the nozzles on the first flushing mechanism 40 have different directions. However, it is easy to understand that even if the number of nozzles on the first flushing mechanism 40 is configured to be sufficient and the spraying range is large enough, the cleaning solvent is still difficult to spray directly to the bottom of the inner wall of the reactor 10 and the bottom of the reactor 10 due to the obstruction of the stirring paddle 32, and can hardly be sprayed to the discharge port 11. As a result, the gel in these areas is difficult to be removed by the impact force of the fluid, and it is difficult to obtain a better cleaning effect.

[0037] In the present invention, the second flushing mechanism 50 is located below the stirring paddle 32 of the agitator 30. Since it can avoid the obstruction of the stirring paddle 32, the cleaning solvent sprayed by the second flushing mechanism 50 can be directly sprayed onto the lower inner wall of the reactor 10 and the bottom of the reactor 10, especially the discharge port 11.

[0038] The present invention further configures the second flushing mechanism 50 into a structural form that avoids increasing stirring resistance and preventing the polymerizing liquid and glue from adhering thereto during the polymerization reaction.

[0039] To achieve the above effect, Figures 1 to 7 As shown, the second flushing mechanism 50 and related components are configured as follows.

[0040] The main shaft component 31 is provided with an inner hole, which extends axially. The lower end of the inner hole passes through the lower end of the main shaft component 31 , and the upper end of the inner hole extends to the upper end of the main shaft component 31 , so that the main shaft component 31 has a tubular structure.

[0041] The second flushing mechanism 50 includes: an actuator 33, a retaining component 54, and a plurality of strip-shaped injection components 51 (for example, the attached figure shows four strip-shaped injection components 51). The retaining component 54 has a cylindrical surface and extends axially. The retaining component 54 is placed in the inner hole of the main shaft component 31 and can slide axially along the inner hole; the lower end of the retaining component 54 is provided with circumferentially arranged mounting grooves 542 and the same number as the strip-shaped injection components 51. The plurality of mounting grooves 542 are arranged circumferentially. The proximal end surface of each strip-shaped injection component 51 is provided with an ear plate 513. The ear plates 513 of the plurality of strip-shaped injection components 51 are respectively extended into the mounting grooves 542 at the lower end of the retaining component 54, and are penetrated with a pin shaft. In this way, all the strip-shaped injection components 51 are arranged circumferentially and can move radially outward and inward relative to the retaining component 54. After the inward pivoting, the plurality of strip-like injection components 51 are radially retracted and can be accommodated in the inner hole of the main shaft component 31. The state of the second flushing mechanism 50 and the strip-like injection components 51 at this time may be referred to as a retracted state. After the outward pivoting, the plurality of strip-like injection components 51 are radially expanded. The state of the second flushing mechanism 50 and the strip-like injection components 51 at this time may be referred to as an expanded state. The expansion degree of the strip-like injection components 51 is limited by stopping the ear plate 513 at the proximal end of the strip-like injection components 51 through the bottom of the mounting groove 542, thereby limiting the range covered by the plurality of strip-like injection components 51 after expansion.

[0042] A torsion spring 53 for providing elastic force to the strip-shaped injection component 51 is disposed between the ear plate 513 and the mounting groove 542 of each strip-shaped injection component 51 , so that the strip-shaped injection component 51 is in an expanded state in a free state.

[0043] The actuator 33 is disposed at the upper end of the main shaft component 31 or in the inner hole of the main shaft component 31 (the figure shows a structure in which the actuator 33 is disposed in the inner hole of the main shaft component 31). An electrostrictive cylinder 55 is selected as the actuator 33. The lower end of the telescopic rod 551 of the electrostrictive cylinder 55 is connected to the upper end of the holding component 54. A brush 58 is disposed outside the main shaft component 31 above the top of the reactor 10 to achieve the purpose of not affecting the rotation of the main shaft component 31 and enabling the power supply to supply power to the electrostrictive cylinder 55. The telescopic rod 551 of the electrostrictive cylinder 55 is used to drive the holding component 54 to move axially.

[0044] When the electrostrictive cylinder 55 drives the holding member 54 to move downward, the holding member 54 pushes the plurality of strip-shaped ejection members 51 to move downward and extend from the lower end of the main shaft member 31. Figure 6 and Figure 7As shown in FIG. 1 , after the plurality of strip-shaped spray components 51 extend from the lower end of the main shaft component 31, the elastic force applied by the torsion spring 53 causes the corresponding strip-shaped spray components 51 to pivot radially outward and switch to the expanded state. When the electrostrictive cylinder 55 drives the holding component 54 to move upward, the holding component 54 drives the strip-shaped spray components 51 to be dragged into the inner hole of the main shaft component 31. Under the contraction of the inner hole of the lower end of the main shaft component 31, as shown in FIG. Figure 1 and Figure 2 As shown, the plurality of strip-shaped spray components 51 overcome the elastic force of the torsion spring 53 and pivot radially inward to switch to a retracted state and are retracted in the inner hole of the main shaft component 31 .

[0045] like Figure 2 As shown, each strip-shaped spray component 51 is provided with a spray chamber 511 and a spray interface 512 connected to the spray chamber 511. The spray interface 512 is located at the proximal end of the strip-shaped spray component 51, so that the spray interface 512 is close to the lower end of the holding component 54. A liquid supply chamber 541 is provided inside the holding component 54. A plurality of hoses 516 are drawn out from the lower end of the holding component 54 to be respectively connected to the spray interfaces 512 of each strip-shaped spray component 51, so that the liquid supply chamber 541 in the holding component 54 is connected to the spray chamber 511 of each strip-shaped spray component 51. In this way, after the plurality of strip-shaped spray components 51 extend out of the lower end of the spindle component 31 and switch to the expanded state, the fourth feed line 24 supplies a cleaning solvent to the liquid supply chamber 541, and the cleaning solvent in the liquid supply chamber 541 is supplied to the spray chamber 511 of each strip-shaped spray component 51 through each hose 516.

[0046] A plurality of nozzles 52 are arranged on the surface of the strip-shaped spraying member 51 . The spray holes 522 of the nozzles 52 penetrate into the spraying chamber 511 , so that the cleaning solvent supplied into the spraying chamber 511 is sprayed out through the nozzles 52 .

[0047] The present invention provides a structure for providing a cleaning solvent to the liquid supply cavity 541 of the holding component 54, specifically, as Figure 2 and Figure 7As shown, a plurality of liquid supply channels 56 are arranged in the tube wall of the main shaft component 31, and the plurality of liquid supply channels 56 are arranged circumferentially; the liquid supply channels 56 extend axially so that the upper end and the lower end of the liquid supply channels 56 are respectively located at the upper part and the lower part of the main shaft component 31; the upper part of the main shaft component 31 has a plurality of first wall holes 561 which are respectively connected to the upper ends of the plurality of liquid supply channels 56 from the outer surface of the main shaft component 31; the lower part of the main shaft component 31 has a plurality of second wall holes 562 which are respectively connected to the lower ends of the plurality of liquid supply channels 56 from the inner hole wall of the main shaft component 31; the upper outer sleeve of the main shaft component 31 is provided with a flow guide component 57, which guides A first annular groove 571 is arranged on the inner wall of the flow component 57, and the first annular groove 571 is opposite to the first wall hole 561. A guide hole 572 is opened on the guide component 57 and passes through the first annular groove 571 transversely, and a pipeline for providing a cleaning solvent is connected to the guide hole 572; a second annular groove 543 is arranged on the outer peripheral surface of the retaining component 54, and a flow hole 544 is opened at the bottom of the second annular groove 543 and passes through the liquid supply cavity 541. When the retaining component 54 moves to a position where a plurality of strip-shaped injection components 51 extend out of the lower end of the main shaft component 31, the first annular groove 571 is opposite to the second wall hole 562.

[0048] The following is an introduction to the working process of the flushing system in the polymerization reaction unit.

[0049] like Figure 1 and Figure 2 As shown, during the polymerization reaction, the fourth feed pipeline 24 stops supplying the cleaning solvent, the first cleaning mechanism does not spray the cleaning solvent into the reactor 10, the electrostrictive cylinder 55 drives the holding component 54 to move upward and remain in the upper position, the holding component 54 drags the multiple strip-shaped spraying components 51 pivoted at its lower end into the inner hole of the main shaft component 31 and accommodates them in the inner hole, at this time, the second annular groove 543 of the holding component 54 is misaligned with the second wall hole 562 at the lower end of the liquid supply channel 56, so that the lower end of the liquid supply channel 56 is closed, and the cleaning solvent will not be sprayed out from the nozzle 52 of the strip-shaped spraying component 51.

[0050] After the polymerization reaction is completed and the reaction product is discharged through the discharge port 11, a cleaning solvent is provided to the fourth feed line 24, and the retaining member 54 is still maintained in the upper position, so that the second annular groove 543 is still maintained in the dislocated state, and the liquid supply channel 56 is still maintained in the closed state. At this time, the fourth feed line 24 can only supply the cleaning solvent to the first flushing mechanism 40 and cannot supply the cleaning solvent to each strip-shaped spraying member 51. The cleaning solvent is sprayed from the nozzle of the first flushing mechanism 40 to clean the upper part of the inner wall of the reactor 10, and the gel on the main shaft member 31 and the stirring paddle 32 of the stirrer 30.

[0051] After the upper part of the inner wall of the reaction kettle 10 and most of the gel on the agitator 30 are cleaned by the first flushing mechanism 40, the holding component 54 is driven downward by the electrostrictive cylinder 55, and the holding component 54 drives the plurality of strip-shaped spray components 51 to extend out of the lower end of the main shaft component 31 and then automatically switches to the expanded state. At this time, the holding component 54 moves downward to the lower position, and the second annular groove 543 moves downward to face the second wall hole 562. Figure 6 and Figure 7 As shown, in this way, while the fourth feed pipeline 24 provides the cleaning solvent to the first flushing mechanism 40, the fourth feed pipeline 24 also provides the cleaning solvent to the first annular groove 571 of the guide component 57 through the guide hole 572, and the cleaning solvent in the second annular groove 543 enters the liquid supply channel 56 through the first wall hole 561, flows downward along the liquid supply channel 56 and enters the second annular groove 543 of the retaining component 54 through the second wall hole 562, and then enters the liquid supply cavity 541 inside the retaining component 54 through the flow hole 544 at the bottom of the second annular groove 543, and then enters the liquid spray cavity 511 of each strip-shaped spray component 51 through each hose 516. The cleaning solvent entered into the liquid spray cavity 511 is sprayed to the lower part of the inner wall of the reactor 10 and the bottom of the reactor 10, especially the discharge port 11, through the nozzle 52 of the strip-shaped spray component 51, thereby cleaning the gel in these areas.

[0052] The cleaned gel can be discharged through the sewage pipeline 26. After each of the reactors 10 is cleaned and discharged, the supply of the cleaning solvent to the fourth feed pipeline 24 is stopped, and the holding member 54 is driven by the electrostrictive cylinder 55 to return to the upper position, so that each strip-shaped spraying member 51 is retracted in the inner hole of the main shaft member 31.

[0053] In some preferred embodiments, the nozzle 52 on the surface of each strip-shaped spraying member 51 includes a body 521 and a mouth 523 attached to the head of the body 521. The mouth 523 is made of elastic material. The mouth 523 is configured with a pore 524 that can be opened and closed. The pore 524 is located at the end of the spray hole 522 connected to the spray chamber 511. More specifically, the mouth 523 is configured with a cross-shaped cutting slit 525. Under the pressure of the cleaning solvent, the cutting slit 525 opens, so that the pore 524 is opened, and the cleaning solvent is sprayed from the pore 524. After the cleaning solvent is stopped from being supplied to the spray chamber 511, although the cleaning solvent exists in the spray chamber 511, the pressure of the cleaning solvent is almost zero, so that the cutting slit 525 is closed, thereby closing the pore 524. In this way, substances such as polymer liquid cannot enter the pore 524 and the spray hole 522, so that gel cannot be formed in the spray hole 522, thereby preventing the gel from blocking the spray hole 522.

[0054] It is easy to understand that the nozzle liquid in the first cleaning mechanism can be configured to have a structure consistent with the nozzle 52 of the strip-shaped spraying member 51 to prevent the nozzle from being blocked by gel.

[0055] In some more preferred structures, the strip-shaped spray component 51 is fan-shaped in a cross section perpendicular to the extension direction, so that the strip-shaped spray component 51 has a radial surface 514 and a circumferential surface 515 located on both sides of the radial surface 514, and the radial surface 514 and the two circumferential surfaces 515 are all covered with nozzles 52. In this way, after each strip-shaped spray component 51 switches to the expansion state, the radial surface 514 of the strip-shaped spray component 51 is basically facing the bottom of the reactor 10, and the circumferential surface 515 of the strip-shaped spray component 51 is more facing the lower part of the inner wall of the reactor 10 than the radial surface 514, so that each strip-shaped spray component 51 has a larger spray range and can spray the cleaning solvent to the bottom and the lower part of the inner wall of the reactor 10. More preferably, the liquid spray interface 512 is located on the radial surface 514 close to the proximal end.

[0056] In some preferred embodiments, a plate-shaped cover component 59 for covering the lower end of the main shaft component 31 is pivotally connected to the lower end of the main shaft component 31, and a torsion spring (not shown) is arranged in the pivoting area. After the strip-shaped injection component 51 is folded and retracted into the inner hole of the main shaft component 31, the cover component 59 is reset to close the inner hole of the lower end of the main shaft component 31, thereby preventing the material from entering the inner hole through the lower end of the main shaft component 31 during the polymerization reaction.

[0057] In some preferred embodiments, the polymerization reaction device further comprises a temporary storage tank 60; a partition 61 is provided at the bottom of the interior of the temporary storage tank 60 to divide the interior of the temporary storage tank 60 into two storage chambers; two discharge pipelines are drawn out from the discharge port 11 of the reactor 10 and extend into the two storage chambers through the top of the temporary storage tank 60 respectively; the bottoms of the two storage chambers are equipped with discharge ports 62, and the two discharge ports 62 converge to form a delivery pipeline 27, on which a liquid pump 28 is provided. After the polymerization reaction is completed, the reaction product needs to be allowed to stand, and the standing time accounts for a large proportion. By providing a temporary storage tank 60, the reaction product that needs to be allowed to stand after the polymerization reaction is completed is introduced into the temporary storage tank 60, so that the reactor 10 provides space for the polymerization reaction of the next batch of monomers, which is conducive to improving the preparation efficiency. The purpose of configuring two storage chambers in the temporary storage tank 60 is to introduce the reaction products in the reactor 10 into the two storage chambers in two batches. After the reaction product in any storage chamber of the temporary storage tank 60 has been allowed to stand for a long time and has passed the test, the reaction product is discharged from the temporary storage tank 60 through the delivery pipeline 27 under the action of the liquid pump 28 .

[0058] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the execution of this application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0059] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more schemes thereof) may be used in combination with each other. For example, a person of ordinary skill in the art may use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features may be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a particular disclosed embodiment. Thus, the following claims are incorporated herein as examples or embodiments in the specific embodiments, wherein each claim is independently a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the appended claims and the full scope of equivalent forms granted by these claims.

[0060] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A polymerization reaction device, characterized in that: include: A reactor having a first feed inlet, a second feed inlet and a third feed inlet at the top, and a discharge port at the bottom; A feed pipeline, comprising: a first feed pipeline connected to the first feed port for feeding a plurality of monomers into the reactor, a second feed pipeline connected to the second feed port for feeding an initiator into the reactor, and a third feed pipeline connected to the third feed port for feeding a terminator into the reactor; an agitator extending from the bottom of the reactor into the reactor, the agitator comprising a main shaft component and a plurality of agitating paddles mounted on the main shaft component; A first flushing mechanism, which is arranged at an upper portion of the interior of the reactor, and is used to spray a cleaning solvent toward an inner wall of the reactor and an agitator; The second flushing mechanism is arranged at the lower part of the main shaft component and below the stirring paddle. The second flushing mechanism has a radially contracted state and a radially expanded state that can be switched. During the polymerization reaction, the second flushing mechanism is switched to the contracted state. When cleaning is required, the second flushing mechanism is switched to the expanded state. After switching to the expanded state, the second flushing mechanism at least sprays a cleaning solvent to the bottom of the reactor.

2. The polymerization reaction device according to claim 1, characterized in that: An inner hole is opened upward from the lower end of the main shaft component so that the main shaft component is formed into a tubular structure; The second flushing mechanism comprises: A retaining component, which is disposed in the inner hole of the spindle component and can slide along the inner hole; an actuator for driving the holding member; A strip-shaped spray component, comprising a plurality of strip-shaped spray components, the ends of which are pivotally connected to the lower end of the holding component and arranged circumferentially, a torsion spring is provided at the pivoting area between each strip-shaped spray component and the holding component, and the torsion spring is used to apply an elastic force to the strip-shaped spray component to cause the strip-shaped spray component to twist outward; each strip-shaped spray component has a liquid spraying cavity located inside and a plurality of nozzles arranged on the outer surface and penetrating into the liquid spraying cavity; The interior of the holding component has a liquid supply cavity connected to a pipeline for providing a cleaning solvent, and the lower end of the holding component has a hose that enables the liquid supply cavity to be connected to the liquid spraying cavities of the plurality of strip-shaped spraying components respectively; The holding member is moved upward to force the plurality of strip-shaped spray members to pivot inward and enter the inner hole of the main shaft member, thereby switching the second flushing mechanism to a retracted state; The holding member is moved downward to push the plurality of strip-shaped spray members extending below the main shaft member, and the strip-shaped spray members are forced to pivot outward by the torsion spring, so that the second flushing mechanism is switched to the expanded state.

3. The polymerization reaction device according to claim 2, characterized in that: A plurality of liquid supply channels are arranged in the tube wall of the main shaft component, and the plurality of liquid supply channels are arranged circumferentially; the liquid supply channels extend axially so that the upper end and the lower end of the liquid supply channels are respectively located at the upper part and the lower part of the main shaft component; The upper part of the main shaft component has a plurality of first wall holes which respectively pass through from the outer surface of the main shaft component to the upper ends of the plurality of liquid supply channels; the lower part of the main shaft component has a plurality of second wall holes which respectively pass through from the inner hole wall of the main shaft component to the lower ends of the plurality of liquid supply channels; The upper outer sleeve of the spindle component is provided with a flow guide component, the inner wall of the flow guide component is configured with a first annular groove, the first annular groove is opposite to the first wall hole, and the flow guide component is provided with a flow guide hole that is transversely connected to the first annular groove, and is used to provide a pipeline for the cleaning solvent to be connected to the flow guide hole; A second annular groove is arranged on the outer peripheral surface of the retaining component, and a flow hole penetrating to the liquid supply chamber is opened at the bottom of the second annular groove. When the retaining component moves to a position where the plurality of strip-shaped injection components extend out of the lower end of the main shaft component, the first annular groove is opposite to the second wall hole.

4. The polymerization reaction device according to claim 2, characterized in that: A plate-shaped cover component for covering a lower port of the main shaft component is pivotally connected to the lower end of the main shaft component.

5. The polymerization reaction device according to claim 1, characterized in that: The first flushing mechanism includes a plurality of liquid spraying pipes arranged in a ring shape and nozzles arranged on the liquid spraying pipes.

6. The polymerization reaction device according to claim 2, characterized in that: The actuator is an electrostrictive cylinder, and a telescopic rod of the electrostrictive cylinder is connected to the upper end of the holding component.

7. The polymerization reaction device according to claim 1, characterized in that: The polymerization reaction device also includes a temporary storage tank; A partition is provided at the bottom of the temporary storage tank to divide the interior of the temporary storage tank into two storage chambers; wherein: Two discharge pipelines are led out from the discharge port of the reactor and extend into the two storage chambers through the top of the temporary storage tank respectively; The bottoms of the two storage chambers are each provided with a discharge port, and the two discharge ports are combined to form a delivery pipeline, and a liquid pump is arranged on the delivery pipeline.

8. The polymerization reaction device according to claim 1, characterized in that: Branch lines for conveying different monomers are connected to the first feed line, on which a mixer is provided.

9. The polymerization reaction device according to claim 1, characterized in that: The pipeline for supplying the cleaning solvent is divided into two branch lines for supplying the cleaning solvent to the first flushing mechanism and the second flushing mechanism respectively.

10. The polymerization reaction device according to claim 1, characterized in that: The spindle assembly is driven by an electric motor or a hydraulic motor mounted above the top of the reactor.

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