Depolymerization kettle feeding device capable of improving efficiency

Abstract

The utility model discloses a depolymerization kettle feeding device capable of improving efficiency, and relates to the technical field of depolymerization kettles.The depolymerization kettle feeding device comprises a machine base, a kettle body arranged on the machine base and a kettle cover arranged at the top of the kettle body, a feeding pipe is arranged at the top of the kettle cover, a sealing cover is movably arranged on the feeding pipe, and a rotating device is arranged at the top of the kettle cover; according to the present invention, the material is added into the kettle body through the feeding pipe, the material falls on the centrifugal dispersion structure during the falling process, and the material is dispersed through the rotation of the centrifugal dispersion structure so as to disperse the material to the periphery, such that the material can be uniformly dispersed; the centrifugal stopping structure stops the materials dispersed at different positions, so that the materials are dispersed in the adding process, accumulation of the materials is avoided, the step of dispersing the materials after the materials are added into the kettle body is omitted, and the depolymerization efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of depolymerization kettle, and particularly relates to a depolymerization kettle feeding device with improved efficiency. BACKGROUND

[0002] The depolymerization kettle is a device for processing high molecular polymers, which mainly functions to reduce the molecular weight of the high molecular polymers through a depolymerization reaction, so as to improve the processing performance thereof, and to realize the depolymerization reaction of the added materials through specific operating conditions.

[0003] Polylactic acid is a polyester polymer, which needs to be depolymerized in a depolymerization kettle during production. Generally, the materials are added into the depolymerization kettle in advance, and then the reaction is carried out. However, it is inconvenient to add materials in the middle of the process, and excessive one-time addition of materials will cause material accumulation and affect the depolymerization reaction. The existing patent application No. CN114435981A discloses a depolymerization kettle feeding device for polylactic acid production. The device intermittently pushes the materials into the feeding hopper through a pushing structure. Before the materials are pushed into the feeding hopper, the materials will be accumulated on the start-stop structure. When the amount of materials on the start-stop structure reaches a preset value, the start-stop structure is opened, and the materials are introduced into the depolymerization tank. The device can control the time of adding materials into the depolymerization tank and the amount of materials added into the depolymerization tank at one time. After the materials are added, the uniform material structure uniformly distributes the materials introduced into the depolymerization tank, thereby improving the depolymerization efficiency and avoiding material accumulation.

[0004] However, the device still has the following problems. The materials are added into the depolymerization kettle after being accumulated on the start-stop structure to a certain weight. Although the uniform material structure can slightly disperse the falling materials, most of the materials can be effectively dispersed only after falling to the bottom of the depolymerization kettle. A large amount of materials added into the depolymerization kettle need to be dispersed completely after the uniform material structure works for a period of time. In addition, the gap between adjacent push rods on the uniform material structure is large, which leads to poor dispersion effect of the materials, thereby affecting the depolymerization efficiency of the materials. SUMMARY

[0005] The present application aims to provide a depolymerization kettle feeding device with improved efficiency, which solves the technical problems proposed in the background.

[0006] To solve the above technical problems, the present application specifically provides the following technical solutions:

[0007] The utility model provides an improved feeding device for depolymerization reactor, which comprises a base, a reactor body and a reactor cover arranged on the top of the reactor body, the reactor cover is used for closing the top of the reactor body and detachably connected with the reactor body, the top of the reactor cover is provided with a feeding pipe, a cover is movably arranged on the top of the feeding pipe for closing the top of the feeding pipe, the top of the reactor cover is provided with a rotating device, the rotating device is connected with a centrifugal dispersion structure connected with the bottom of the reactor cover, and the bottom of the reactor cover is provided with a centrifugal blocking structure.

[0008] The centrifugal dispersion structure is used for receiving materials added from the feeding pipe and dispersing the materials by centrifugal rotation, and the centrifugal blocking structure is used for intercepting part of the centrifugally dispersed materials at different distances around the centrifugal dispersion structure.

[0009] As a preferred embodiment of the utility model, the centrifugal dispersion structure comprises a connecting shaft connected with the rotating device, the end of the connecting shaft is provided with a centrifugal disc, a plurality of guide strips are arranged on the centrifugal disc in the radial direction, and the centrifugal disc is located below the bottom of the feeding pipe.

[0010] As a preferred embodiment of the utility model, the upper surface of the centrifugal disc is conical.

[0011] As a preferred embodiment of the utility model, the guide strips comprise a plurality of segmented strips arranged in the radial direction of the centrifugal disc in sequence, and the two sides of each segmented strip are provided with inclined surfaces, the two inclined surfaces on each segmented strip extend to the top of the segmented strip and intersect, and one end of each segmented strip towards the center of the centrifugal disc is knife-edged.

[0012] As a preferred embodiment of the utility model, the feeding pipe comprises a feeding pipe arranged on the reactor cover, the bottom of the feeding pipe is inclined to extend downward below the reactor cover and above the centrifugal disc, the bottom of the feeding pipe is provided with a spiral pipe, the spiral pipe surrounds the connecting shaft and spirally extends downward, and a plurality of feeding openings are formed in the spiral pipe.

[0013] As a preferred embodiment of the utility model, the centrifugal blocking structure comprises a plurality of connecting rods connected with the bottom of the reactor cover, the connecting rods are collectively connected with an annular plate, the centrifugal disc is located at the center of the annular plate, the bottom of the annular plate is provided with a plurality of intercepting pieces, and the intercepting pieces are uniformly distributed around the center of the annular plate.

[0014] As a preferred embodiment of the utility model, the intercepting pieces are divided into a plurality of groups, each group of intercepting pieces is uniformly distributed in the form of a ring around the center of the annular plate, and adjacent groups of intercepting pieces are arranged in a staggered manner.

[0015] As a preferred embodiment of the utility model, the intercepting pieces are arc-shaped elastic pieces, and the inner arc length of the intercepting pieces gradually decreases downward along the axis of the connecting shaft.

[0016] As a preferred scheme of the present application, the bottom of the kettle cover is provided with an annular fixed plate, the bottom of the annular fixed plate is provided with a first groove, the first groove is provided with a first elastic connecting piece, the first elastic connecting piece is connected with an annular movable plate in sliding connection with the annular fixed plate, the bottom of the annular movable plate is provided with a second groove, the second groove is provided with a second elastic connecting piece, the second elastic connecting piece is connected with an annular connecting plate in sliding connection with the annular movable plate, and the plurality of connecting rods are connected with the annular connecting plate.

[0017] Wherein, the elastic deformation directions of the first elastic connecting piece and the second elastic connecting piece are perpendicular to each other, the elastic deformation direction of the first elastic connecting piece is the same as the sliding direction of the annular movable plate, and the elastic deformation direction of the second elastic connecting piece is the same as the sliding direction of the annular connecting plate.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The present application adds material into the kettle body through the feeding pipe, the material falls on the centrifugal dispersion structure during falling, and the material is dispersed by the rotation of the centrifugal dispersion structure, so that the material is dispersed to the surrounding, and the centrifugal blocking structure stops the material dispersed in different positions, so that the material is dispersed during the adding process, the accumulation of the material is avoided, and the dispersion step after the material is added into the kettle body is removed, and the depolymerization efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0021] Figure 1 The present application provides a kind of overall structure schematic diagram of improving efficiency's depolymerization kettle feeding device for embodiment of the present application;

[0022] Figure 2 The present application provides a kind of structure schematic diagram of centrifugal dispersion structure and centrifugal blocking structure first view for embodiment of the present application;

[0023] Figure 3 The present application provides a kind of structure schematic diagram of centrifugal dispersion structure and centrifugal blocking structure second view for embodiment of the present application;

[0024] Figure 4 The present application provides a kind of structure schematic diagram of centrifugal dispersion structure first view for embodiment of the present application;

[0025] Figure 5 This invention provides a partial structural schematic diagram of a centrifugal dispersion structure from a second perspective, as shown in the embodiments of the invention.

[0026] Figure 6 This is a partial structural cross-sectional view from a first perspective of an embodiment of the present invention, providing a feeding device for an efficient depolymerization reactor.

[0027] Figure 7 This is a partial structural cross-sectional view from a second perspective of a depolymerization reactor feeding device provided in an embodiment of the present invention to improve efficiency.

[0028] The labels in the diagram represent the following:

[0029] 1. Base; 2. Reactor body; 3. Reactor lid; 4. Rotating device; 5. Centrifugal dispersion structure; 6. Centrifugal barrier structure; 7. Feed pipe; 8. Sealing cap;

[0030] 501. Connecting shaft; 502. Centrifugal disc; 503. Guide bar; 504. Segment bar; 601. Connecting rod; 602. Annular plate; 603. Stop plate; 604. Annular fixing plate; 605. First groove; 606. First elastic connector; 607. Annular movable plate; 608. Second groove; 609. Second elastic connector; 610. Annular connecting plate; 701. Feeding pipe; 702. Spiral tube; 703. Feeding port. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 7 As shown, the present invention provides an efficient depolymerization reactor feeding device, including a base 1, a reactor body 2 and a reactor cover 3 disposed on the top of the reactor body 2 on the base 1, the reactor cover 3 being used to close the top of the reactor body 2 and being detachably connected to the reactor body 2, a feed pipe 7 being disposed on the top of the reactor cover 3, a sealing cap 8 being movably disposed on the feed pipe 7 for closing the top of the feed pipe 7, a rotating device 4 being disposed on the top of the reactor cover 3, a centrifugal dispersion structure 5 being connected to the bottom of the reactor cover 3 being connected to the rotating device 4, and a centrifugal blocking structure 6 being disposed at the bottom of the reactor cover 3.

[0033] The centrifugal dispersion structure 5 is used to receive the material added by the feed pipe 7 and disperse it by centrifugal rotation. The centrifugal blocking structure 6 is used to intercept part of the centrifugally dispersed material at different distances around the centrifugal dispersion structure 5.

[0034] In actual application, the material is added into the kettle body 2 through the feeding pipe 7, and after falling below the kettle cover 3, the material first falls onto the centrifugal dispersion structure 5. The centrifugal dispersion structure 5 is driven by the rotating device 4, so that the centrifugal dispersion structure 5 throws the falling material around in the process of rotation, and the centrifugal blocking structure 6 blocks the thrown material around the centrifugal dispersion structure 5, so that the material can be blocked at different positions by the centrifugal blocking structure 6 after being dispersed by the centrifugal dispersion structure 5, so that the dispersed material is attached to the centrifugal blocking structure 6 and falls into different positions in the kettle body 2, realizing the dispersion of the material and avoiding the accumulation of the material, and improving the efficiency of the material depolymerization.

[0035] The application directly disperses the material in the process of falling, so that the material is in a dispersed state when falling into the bottom of the kettle body 2, and the material does not accumulate, and subsequent dispersion of the material is not required, the rate of material depolymerization can be accelerated, the time required for depolymerization process is reduced, and the efficiency of depolymerization is improved.

[0036] The centrifugal dispersion structure 5 includes a connecting shaft 501 connected with the rotating device 4, and the end of the connecting shaft 501 is provided with a centrifugal disc 502. The centrifugal disc 502 is provided with a plurality of guide strips 503 in the radial direction, and the centrifugal disc 502 is located below the bottom of the feeding pipe 7.

[0037] After the material falls onto the centrifugal disc 502 through the feeding pipe 7, the rotating device 4 drives the connecting shaft 501 to drive the centrifugal disc 502 to rotate, so that the material is thrown out to the side of the centrifugal disc 502 under the action of centrifugal force, and the guide strips 503 limit the material from being translated and thrown out of the centrifugal disc 502, thereby improving the efficiency of centrifugal dispersion.

[0038] The upper surface of the centrifugal disc 502 is conical.

[0039] The conical surface of the centrifugal disc 502 facilitates the material to slide off the centrifugal disc 502, so that even if the centrifugal disc 502 stops rotating due to failure, the material can slide to the bottom of the kettle body 2 under the action of its own gravity for depolymerization reaction, and the material will not accumulate on the centrifugal disc 502 to affect the depolymerization of the material.

[0040] The guide strip 503 includes a plurality of segmented strips 504 arranged in the radial direction of the centrifugal disc 502 in sequence, and each segmented strip 504 is provided with inclined surfaces on both sides. The two inclined surfaces on each segmented strip 504 extend to the top of the segmented strip 504 and intersect, and one end of each segmented strip 504 towards the center of the centrifugal disc 502 is in the shape of a knife edge.

[0041] When the material slides along the surface of the centrifugal disc 502, the ends of the plurality of segmented strips 504 arranged in segments break the material that coagulates into blocks and moves, and can ensure that the material can be thrown out, and the knife-shaped ends of the segmented strips 504 can avoid the accumulation of the material, and the knife-shaped ends of the segmented strips 504 can also cut the material thrown out under the action of the centrifugal force, further breaking the coagulated material.

[0042] The feed pipe 7 includes a feeding pipe 701 arranged on the cover 3, and the bottom of the feeding pipe 701 extends obliquely downward below the cover 3 and above the centrifugal disc 502, and the bottom of the feeding pipe 701 is provided with a spiral pipe 702 that spirally extends downward around the circumference of the connecting shaft 501, and a plurality of feeding openings 703 are arranged on the spiral pipe 702.

[0043] The material is added from the feeding pipe 701, and after the added material enters the spiral pipe 702, the material is dropped onto the centrifugal disc 502 through the plurality of feeding openings 703 on the spiral pipe 702 and the port of the spiral pipe 702, so that the material is dispersed by the rotation of the centrifugal disc 502.

[0044] Due to the spiral shape of the spiral pipe 702, the dropped material can be more uniformly distributed on the centrifugal disc 502, further improving the uniformity of material dispersion.

[0045] The centrifugal blocking structure 6 includes a plurality of connecting rods 601 connected to the bottom of the cover 3, and the plurality of connecting rods 601 are jointly connected to an annular plate 602, and the centrifugal disc 502 is located at the center of the annular plate 602, and the bottom of the annular plate 602 is provided with a plurality of stopping pieces 603 that are uniformly distributed around the center of the annular plate 602.

[0046] The material thrown out by the centrifugal disc 502 contacts the stopping pieces 603 at different positions and stops moving in the direction of the inner wall of the kettle body 2 by the blocking of the stopping pieces 603, and then the material slides to the inner bottom of the kettle body 2 under the action of gravity, so that the dispersed material is subjected to depolymerization reaction.

[0047] The plurality of connecting rods 601 are used to improve the stability of the annular plate 602, and the height of the annular plate 602 is greater than the height of the centrifugal disc 502, so that the material dispersed by the centrifugal disc 502 can contact the plurality of stopping pieces 603.

[0048] The plurality of stopping pieces 603 are divided into a plurality of groups, and each group of stopping pieces 603 is uniformly distributed in a circular ring around the center of the annular plate 602, and adjacent two groups of stopping pieces 603 are arranged in a staggered manner.

[0049] The plurality of stop pieces 603 are arranged in staggered manner, so that part of the material contacts the stop piece 603 closest to the center of the annular plate 602, and part of the remaining material contacts the stop piece 603 of the next group through the space between the adjacent stop pieces 603, so that the material can contact the stop pieces 603 at different positions from the center of the annular plate 602, thereby enabling the material to be uniformly dispersed in the interior of the kettle body 2.

[0050] The stop piece 603 is an elastic piece in the shape of a circular arc, and the inner arc length of the stop piece 603 gradually decreases along the axis of the connecting shaft 501.

[0051] When the material contacts the stop piece 603, the material collides with the stop piece 603, causing the stop piece 603 to elastically deform slightly, thereby causing the material adhering to the stop piece 603 to be thrown off by the elastic effect of the stop piece 603. The bottom arc length of the stop piece 603 is the smallest, so that the material tends to gather at the bottom of the stop piece 603 when sliding down the stop piece 603, which is more convenient for the material to slide off the stop piece 603, thereby improving the falling speed of the material and further improving the depolymerization efficiency of the material.

[0052] The bottom of the kettle cover 3 is provided with an annular fixed plate 604, the bottom of the annular fixed plate 604 is provided with a first recess 605, the first recess 605 is provided with a first elastic connecting piece 606, the first elastic connecting piece 606 is connected with an annular movable plate 607 in sliding connection with the annular fixed plate 604, the bottom of the annular movable plate 607 is provided with a second recess 608, the second recess 608 is provided with a second elastic connecting piece 609, the second elastic connecting piece 609 is connected with an annular connecting plate 610 in sliding connection with the annular movable plate 607, and the plurality of connecting rods 601 are connected with the annular connecting plate 610.

[0053] The elastic deformation directions of the first elastic connecting piece 606 and the second elastic connecting piece 609 are perpendicular to each other, the elastic deformation direction of the first elastic connecting piece 606 is the same as the sliding direction of the annular movable plate 607, and the elastic deformation direction of the second elastic connecting piece 609 is the same as the sliding direction of the annular connecting plate 610.

[0054] When the intercepting sheet 603 contacts the centrifugally dispersed material, the material collides with the intercepting sheet 603, so that the intercepting sheet 603 is subjected to the force applied by the material. The force applied by the material to the intercepting sheet 603 can be decomposed into two perpendicular directions, and the directions of the two decomposed forces are the same as the elastic deformation directions of the first elastic connecting member 606 and the second elastic connecting member 609. Therefore, the annular connecting plate 610 slides on the annular movable plate 607 and elastically deforms the second elastic connecting member 609, and the annular movable plate 607 slides on the annular fixed plate 604 and elastically deforms the first elastic connecting member 606. Under the elastic force of the first elastic connecting member 606 and the second elastic connecting member 609, a shaking effect is formed on the intercepting sheet 603, so that the material can be more easily shaken off from the intercepting sheet 603, and the material is prevented from adhering to the intercepting sheet 603, thereby ensuring the normal progress of the material depolymerization reaction.

[0055] The above examples are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements shall also be considered to fall within the protection scope of the present application.

Claims

1. An efficient depolymerization feed device for a depolymerization reactor comprising a base (1), characterized in that, The kettle body (2) and the kettle cover (3) are arranged on the base (1), the kettle cover (3) is used for closing the top of the kettle body (2) and is detachably connected with the kettle body (2), the top of the kettle cover (3) is provided with a feeding pipe (7), the feeding pipe (7) is movably provided with a cover (8) for closing the top of the feeding pipe (7), the top of the kettle cover (3) is provided with a rotating device (4), the rotating device (4) is connected with a centrifugal dispersion structure (5) connected with the bottom of the kettle cover (3), and the bottom of the kettle cover (3) is provided with a centrifugal blocking structure (6). The centrifugal dispersion structure (5) is used for receiving materials added from the feeding pipe (7) and dispersing the materials by centrifugal rotation, and the centrifugal blocking structure (6) is used for intercepting part of the centrifugally dispersed materials at different distances around the centrifugal dispersion structure (5).

2. The improved depolymerization feed arrangement of claim 1, wherein, The centrifugal dispersion structure (5) comprises a connecting shaft (501) connected with the rotating device (4), the end of the connecting shaft (501) is provided with a centrifugal disc (502), a plurality of guide strips (503) are arranged on the centrifugal disc (502) in the radial direction, and the centrifugal disc (502) is located below the bottom of the feeding pipe (7).

3. The improved depolymerization feed arrangement of claim 2, wherein, The upper surface of the centrifugal disc (502) is conical.

4. The improved depolymerization feed arrangement of claim 2, wherein, The guide strips (503) comprise a plurality of segmented strips (504) arranged in the radial direction of the centrifugal disc (502) in sequence, and each segmented strip (504) is provided with inclined surfaces on both sides, the two inclined surfaces on each segmented strip (504) extend to the top of the segmented strip (504) and intersect, and one end of each segmented strip (504) towards the center of the centrifugal disc (502) is knife-edge-shaped.

5. The improved depolymerization feed arrangement of claim 2, wherein, The feeding pipe (7) comprises a feeding pipe (701) arranged on the kettle cover (3), the bottom of the feeding pipe (701) is inclined to extend downward below the kettle cover (3) and above the centrifugal disc (502), the bottom of the feeding pipe (701) is provided with a spiral pipe (702), the spiral pipe (702) surrounds the connecting shaft (501) and spirally extends downward, and a plurality of feeding openings (703) are formed in the spiral pipe (702).

6. The improved depolymerization feed arrangement of claim 2, wherein, The centrifugal blocking structure (6) comprises a plurality of connecting rods (601) connected with the bottom of the kettle cover (3), the connecting rods (601) are jointly connected with an annular plate (602), the centrifugal disc (502) is located at the center of the annular plate (602), and the bottom of the annular plate (602) is provided with a plurality of intercepting pieces (603) uniformly distributed around the center of the annular plate (602).

7. An improved depolymerization feed arrangement for a depolymerization reactor as claimed in claim 6, wherein, The intercepting pieces (603) are divided into a plurality of groups, each group of intercepting pieces (603) is uniformly distributed in the form of a ring around the center of the annular plate (602), and adjacent groups of intercepting pieces (603) are arranged in a staggered manner.

8. The improved depolymerization feed arrangement of claim 6, wherein, The intercepting piece (603) is an arc-shaped elastic piece, and the inner arc length of the intercepting piece (603) gradually decreases downward along the axis of the connecting shaft (501).

9. The improved depolymerization feed arrangement of claim 6, wherein, The bottom of the kettle cover (3) is provided with an annular fixed plate (604), the bottom of the annular fixed plate (604) is provided with a first groove (605), the first groove (605) is provided with a first elastic connecting piece (606), the first elastic connecting piece (606) is connected with an annular movable plate (607) which is in sliding connection with the annular fixed plate (604), the bottom of the annular movable plate (607) is provided with a second groove (608), the second groove (608) is provided with a second elastic connecting piece (609), the second elastic connecting piece (609) is connected with an annular connecting plate (610) which is in sliding connection with the annular movable plate (607), and the plurality of connecting rods (601) are connected with the annular connecting plate (610); Wherein, the elastic deformation directions of the first elastic connecting piece (606) and the second elastic connecting piece (609) are perpendicular to each other, the elastic deformation direction of the first elastic connecting piece (606) is the same as the sliding direction of the annular movable plate (607), and the elastic deformation direction of the second elastic connecting piece (609) is the same as the sliding direction of the annular connecting plate (610).

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