A by-product separation apparatus for use in the production of vinylene carbonate

Abstract

The application discloses a by-product separation device produced by using vinylene carbonate, and relates to the technical field of by-product separation. The device comprises a supporting frame, a protection shell and a fixed shell which are fixedly connected to the supporting frame, a closing cover which is hingedly connected to the upper side of the protection shell, a push rod which is hingedly connected between the supporting frame and the closing cover, a first driving motor which is arranged on the closing cover, a driving shaft of the first driving motor, a distributor which is fixedly connected to the driving shaft and arranged in the protection shell, a material guide pipe which is fixedly connected to the closing cover and used for conveying solution into the distributor, a clean water pipe which is fixedly connected to the closing cover, a rotating shell which is sealingly and rotatably connected to the protection shell, filter cloth which is placed in the rotating shell, and a pull rope which is arranged around the rotating shell and the filter cloth. The filter cloth is partially deformed by being extruded in the pull rope contraction process, the adhesion state between the solid impurities and the filter cloth is damaged, the solid impurities are actively separated, and the cleaning efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of by-product separation, in particular to a by-product separation device for producing vinylene carbonate. BACKGROUND

[0002] In the production process of vinylene carbonate, by-products such as triethylamine hydrochloride and ammonium chloride are usually generated, wherein the triethylamine hydrochloride is generated by the reaction of the commonly used catalyst triethylamine and hydrochloric acid. In order to improve the purity of raw materials and separation efficiency, centrifugal separation technology is widely used in the production process, which mainly functions to effectively remove impurities in the solution, thereby improving the quality and yield of the product.

[0003] At present, the no-blade pull-bag centrifuge is a common solid-liquid separation device, and its working principle is that when the centrifuge rotates at high speed, the solution is subjected to centrifugal force, the liquid enters the collection cavity outside the rotating drum through the filter cloth, and the solid impurities are intercepted on the surface of the filter cloth, so as to realize solid-liquid separation. When the filter cloth needs to be cleaned, the lower end of the filter cloth is pulled to make the adhered solid impurities fall off with the deformation of the filter cloth. However, due to the extrusion effect of the inner layer solid impurities and the centrifugal force on the solid impurities close to the filter cloth layer, the solid impurities are easily compacted into a cake structure, which makes it difficult for the solid impurities to separate from the filter cloth, thereby causing residues in the cleaning process and affecting the subsequent separation effect of the filter cloth. SUMMARY

[0004] In order to solve the problems raised in the above background, the present application provides a by-product separation device for producing vinylene carbonate.

[0005] The technical scheme of the present application is as follows: a by-product separation device for producing vinylene carbonate, comprising a support frame, the support frame is fixedly connected with a protective shell and a fixed shell, the upper side of the protective shell is hingedly connected with a closing cover, a push rod is hingedly connected between the support frame and the closing cover, the closing cover is provided with a first driving motor, the driving shaft of the first driving motor is fixedly connected with a distributor located in the protective shell, the closing cover is fixedly connected with a material guide pipe for conveying solution into the distributor, the closing cover is fixedly connected with a clean water pipe, the lower side of the protective shell is fixedly connected and communicated with a liquid discharge pipe, a rotating shell is sealingly and rotatably connected in the protective shell, the rotating shell is a porous structure, a filter cloth is placed in the rotating shell, a pull rope is wound around the rotating shell and the filter cloth, the pull rope is used for extruding the filter cloth, the rotating shell is provided with a fixing assembly for fixing the filter cloth on the rotating shell, and the fixed shell is provided with a power assembly for driving the rotating shell to rotate.

[0006] Preferably, the pull rope is a Dyneema rope, and the pull rope is provided with an elastic steel wire.

[0007] Preferably, the fixing assembly comprises a fixing ring detachably mounted on the upper side of the rotating shell, the fixing ring being used for fixing the upper side of the filter cloth to the rotating shell, and a first sliding ring and a second sliding ring fixedly connected to each other being slidingly connected to the lower side in the rotating shell, the first sliding ring and the second sliding ring being used for fixing the lower side of the filter cloth.

[0008] Preferably, an expansion member is fixedly connected between the lower side in the rotating shell and the second sliding ring, and a communication pipe is fixedly connected to the rotating shell and in communication with the expansion member.

[0009] Preferably, the power assembly comprises a second driving motor arranged in the fixed shell, a rotating seat is fixedly connected to the lower side in the rotating shell, and the rotating seat and a driving shaft of the second driving motor are connected through a belt transmission.

[0010] Preferably, two electric sliding rails are symmetrically arranged in the rotating shell, an electric sliding block in the electric sliding rail is fixedly connected to a limiting shell, and a rope collecting member fixedly connected to the pull rope is rotatably connected to the limiting shell.

[0011] Preferably, two fixing rods are fixedly connected to the rotating shell, helical grooves are arranged on the outer sides of the fixing rods, the fixing rods pass through adjacent rope collecting members, and fixing pins sliding along the helical grooves on the outer sides of the fixing rods are fixedly connected to the rope collecting members.

[0012] Preferably, the electric sliding block of the electric sliding rail is fixedly connected to a connecting frame located on the outer side of the limiting shell, a U-shaped frame is fixedly connected to the connecting frame, symmetrically arranged connecting members are fixedly connected to the U-shaped frame, a pressing member is rotatably connected to the connecting members, the pressing member is used for pressing the filter cloth, and a torsional spring is fixedly connected between the pressing member and the connecting members.

[0013] Preferably, two guide members are fixedly connected to the rotating shell, the fixing rods correspond to the guide members one by one, and the guide members are used for pressing adjacent and symmetrically arranged pressing members.

[0014] Preferably, gaps are left between adjacent two pressing members, and the cross-sectional areas of the guide members gradually increase from top to bottom.

[0015] The present application has the beneficial effect that, when solid impurities in the filter cloth are cleaned, the contraction of the pull rope is combined with the movement of the pull rope driven by the electric sliding block in the electric sliding rail, so that the pull rope moves and contracts, the filter cloth is pressed during the contraction of the pull rope, the filter cloth is partially deformed, the adhesion between the solid impurities and the filter cloth is destroyed, the solid impurities are actively detached, the cleaning efficiency is improved, and the filter cloth is actively deformed to make the impurities fall off through the flexible contact mode.

[0016] When the solid impurities in the filter cloth are cleaned, the filter cloth is pressed by the swing of the extrusion piece, the wrinkle area is inwardly depressed, the adhesion of the solid impurities and the surface of the filter cloth is destroyed, the impurities are actively separated, the wrinkle part of the filter cloth is allowed to relax in the process of being pressed through the gap reserved by the adjacent two extrusion pieces, and the solid impurities are actively separated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the protective shell of the application;

[0018] Figure 2 It is a perspective view of the protective shell of the application;

[0019] Figure 3 It is a perspective view of the protective shell of the application;

[0020] Figure 4 It is a perspective view of the protective shell of the application;

[0021] Figure 5 It is a perspective view of the protective shell of the application;

[0022] Figure 6 It is a perspective view of the protective shell of the application;

[0023] Figure 7 It is a perspective view of the protective shell of the application;

[0024] Figure 8 It is a perspective view of the protective shell of the application;

[0025] Figure 9 It is a perspective view of the protective shell of the application;

[0026] Figure 10 It is a perspective view of the protective shell of the application;

[0027] Figure 11 It is a perspective view of the protective shell of the application;

[0028] In the drawings, 1 is a support frame, 2 is a protective shell, 3 is a fixed shell, 4 is a closing cover, 5 is a push rod, 6 is a first drive motor, 7 is a distributor, 8 is a material guide pipe, 9 is a clean water pipe, 10 is a liquid discharge pipe, 11 is a rotating shell, 12 is a filter cloth, 13 is a pull rope, 14 is a fixed ring, 15 is a first sliding ring, 16 is a second sliding ring, 17 is an expansion piece, 18 is a communication pipe, 19 is a second drive motor, 20 is a rotating seat, 21 is an electric sliding rail, 22 is a limiting shell, 23 is a rope collecting piece, 24 is a fixed rod, 25 is a fixed pin, 26 is a connecting frame, 27 is a U-shaped frame, 28 is a connecting piece, 29 is an extrusion piece, and 30 is a guide piece. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with specific embodiments and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of well-known structures and techniques is omitted to avoid unnecessary confusion of the concept of the present application.

[0030] In order to solve the problem that the solid impurities close to the filter cloth are compacted into a cake shape due to the extrusion of the outer layer of solid impurities and the centrifugal force, and cannot be separated from the filter cloth, resulting in incomplete cleaning and affecting the subsequent separation effect, the following is described:

[0031] Example 1

[0032] A by-product separation device for producing vinylene carbonate, please refer to Figures 1-7 As shown, it comprises a support frame 1, the support frame 1 is provided with a control terminal (not shown in the figure, all electrical elements mentioned in the present application are electrically connected with the control terminal), the support frame 1 is fixedly connected with a protective shell 2 and a fixed shell 3, the upper side of the protective shell 2 is hingedly connected with a closing cover 4, the support frame 1 and the closing cover 4 are hingedly connected with a push rod 5, the closing cover 4 is provided with a first driving motor 6, the driving shaft of the first driving motor 6 is fixedly connected with a distributor 7 located in the protective shell 2, the closing cover 4 is fixedly connected with a material guide pipe 8 for conveying solution into the distributor 7, the closing cover 4 is fixedly connected with a clean water pipe 9, the lower side of the protective shell 2 is fixedly connected and communicated with a liquid discharge pipe 10, the protective shell 2 is sealingly rotatably connected with a rotating shell 11, the gap between the protective shell 2 and the rotating shell 11 is a liquid discharge area, the rotating shell 11 is a porous structure, the rotating shell 11 is placed with a filter cloth 12, a pull rope 13 is wound between the rotating shell 11 and the filter cloth 12, the pull rope 13 is used to extrude the filter cloth 12, the filter cloth 12 is inwardly depressed by the extrusion of the pull rope 13, the adhesion between the solid impurities and the filter cloth 12 is destroyed, the solid impurities are actively separated, the cleaning efficiency is improved, and the filter cloth 12 is actively deformed to make the impurities fall off through the flexible contact, the rotating shell 11 is provided with a fixing assembly for fixing the filter cloth 12 on the rotating shell 11, and the fixed shell 3 is provided with a power assembly for driving the rotating shell 11 to rotate.

[0033] Please refer to Figure 7 and Figure 8 As shown, the pull rope 13 is a Dyneema rope, the pull rope 13 is provided with an elastic steel wire, which is used to reset the pull rope 13 after winding, the Dyneema rope has the characteristics of smoothness, which is used to reduce the friction between the pull rope 13 and the filter cloth 12 during extrusion.

[0034] Please refer toFigures 4-7 As shown in the figure, the fixed assembly includes a fixed ring 14 which is detachably mounted on the upper side of the rotating shell 11, and is used to fix the upper side of the filter cloth 12 to the rotating shell 11. A bolt can be arranged between the fixed ring 14 and the rotating shell 11, and the bolt passes through the filter cloth 12. The lower side of the rotating shell 11 is slidably connected with a first sliding ring 15 and a second sliding ring 16 which are fixedly connected with each other, and the first sliding ring 15 and the second sliding ring 16 are used to fix the lower side of the filter cloth 12.

[0035] Please refer to Figures 4-7 As shown in the figure, the lower side of the rotating shell 11 is fixedly connected with an expansion member 17 which is in communication with the communication pipe 18 fixed to the rotating shell 11. The expansion member 17 can be filled with gas and liquid. When the gas or liquid is extracted, the pressure in the expansion member 17 decreases, causing the expansion member 17 to shrink and drive the second sliding ring 16 to move downward, thereby achieving the pulling of the lower side of the filter cloth 12.

[0036] Please refer to Figures 3-6 As shown in the figure, the power assembly includes a second driving motor 19 arranged in the fixed shell 3. The lower side of the rotating shell 11 is fixedly connected with a rotating seat 20 which is in transmission connection with the driving shaft of the second driving motor 19 through a belt transmission. The fixed shell 3 is fixedly connected with a protective cover for protecting the belt transmission.

[0037] Please refer to Figures 6-10 As shown in the figure, the rotating shell 11 is provided with two center-symmetrically distributed electric sliding rails 21. The electric sliding block in the electric sliding rail 21 is fixedly connected with a limiting shell 22. The electric sliding block in the electric sliding rail 21 can be driven by a waterproof motor (not shown in the figure). The limiting shell 22 is composed of two semicircular shells which are hingedly connected. The limiting shell 22 is rotatably connected with a rope collecting member 23 which is fixedly connected with the pulling rope 13.

[0038] Please refer to Figures 8-10 As shown in the figure, the rotating shell 11 is fixedly connected with two fixed rods 24. The outer side of the fixed rod 24 is provided with a spiral groove. The fixed rod 24 passes through the adjacent rope collecting member 23. The rope collecting member 23 is fixedly connected with a fixed pin 25 which slides along the spiral groove on the outer side of the fixed rod 24. During the downward sliding process of the rope collecting member 23 along the fixed rod 24, the fixed pin 25 slides along the spiral groove on the outer side of the fixed rod 24, so that the rope collecting member 23 rotates during the downward sliding process, and the pulling rope 13 is wound up.

[0039] Working principle: Before the separation of the vinylene carbonate solution (all subsequent descriptions are in the form of solution), the material guide pipe 8 is connected with the existing solution conveying equipment, the water pipe 9 is connected with the existing water conveying equipment, and the communication pipe 18 is connected with the existing pressure control equipment, so as to complete the preparation action before the separation of the solution.

[0040] When the preparation action before solution separation is completed, the user starts the second drive motor 19 through the control terminal, the drive shaft of the second drive motor 19 drives the rotating seat 20 to rotate through the belt drive, the rotating seat 20 drives the rotating shell 11 and its attached parts to rotate synchronously clockwise, the rotating shell 11 rotates along the inner side of the protective shell 2 in the process, at the same time, the control terminal drives the distributor 7 to rotate counterclockwise through the first drive motor 6, the existing solution conveying device conveys the solution into the distributor 7, the distributor 7 throws the solution in it outward in the process of rotation, when the solution contacts with the filter cloth 12 which also rotates, the solid impurities remain on the inner side of the filter cloth 12, the liquid passes through the filter cloth 12 and the rotating shell 11 and enters the protective shell 2 and between the rotating shell 11, and then is discharged by the drain pipe 10.

[0041] After the separation of the solution lasts for a specified time (the time is set by human), the existing solution conveying device no longer conveys the solution into the distributor 7, and then the existing water conveying device conveys clean water into the clean water pipe 9, the clean water pipe 9 sprays clean water, when the clean water contacts with the solid impurities on the inner side of the filter cloth 12, the solid impurities are cleaned, and the liquid passes through the filter cloth 12 and enters the protective shell 2 and between the rotating shell 11 (the above action is the same as the existing one).

[0042] After the cleaning of the solid impurities is completed, the supply of clean water and solution is turned off, and then the cleaning of the solid impurities on the inner side of the filter cloth 12 is started, the cleaning method is as follows:

[0043] The rotating speed of the second drive motor 19 is reduced through the control terminal, so as to reduce the rotating speed of the rotating seat 20 and its attached parts, and then the gas in the communication pipe 18 and the expansion piece 17 is extracted through the pressure control device, so that the pressure in the expansion piece 17 is reduced and the expansion piece 17 is compressed and deformed, the expansion piece 17 drives the second sliding ring 16 and the first sliding ring 15 to slide downward along the rotating shell 11 in the process of compression and deformation, the second sliding ring 16 and the first sliding ring 15 pull the lower side of the filter cloth 12 in the process of movement, so that the filter cloth 12 is deformed and shrinks inward, the solid impurities are affected by the deformation of the filter cloth 12 and fall downward, and finally fall from the middle part of the first sliding ring 15, so as to be discharged from the device (in actual use, a container for collecting solid impurities can be placed under the first sliding ring 15 or an external pipeline can be connected), and because the solid impurities close to the filter cloth 12 are pressed by the outer solid impurities and affected by the centrifugal force, the solid impurities are compacted into a cake shape and are difficult to separate from the filter cloth 12, which leads to incomplete cleaning and reduces the separation effect of the subsequent solution, and the problem is solved by the following method:

[0044] After the filter cloth 12 is deformed, the control terminal controls the electric sliding blocks in the two electric sliding rails 21 to drive the corresponding limiting shells 22 to move downward respectively, and the two limiting shells 22 drive the pull ropes 13 to move downward through the corresponding rope collecting members 23, and the fixed pins 25 slide along the helical grooves of the adjacent fixed rods 24 in the process of downward movement of the rope collecting members 23, so that the rope collecting members 23 rotate during the downward movement, the pull ropes 13 are collected by the rotation of the rope collecting members 23, the length of the pull ropes 13 is shortened, the middle part of the pull ropes 13 is contracted, the pull ropes 13 are extruded from the outside of the filter cloth 12 in the process of contraction, the contact position between the filter cloth 12 and the pull ropes 13 is inwardly recessed, and the downward movement of the limiting shell 22 is further promoted to gradually deform the outside of the filter cloth 12 inwardly, through the deformation process, the solid impurities attached to the inside of the filter cloth 12 are detached due to the loss of the attachment support, so that the automatic cleaning of the surface of the filter cloth 12 is realized.

[0045] After the electric sliding blocks in the electric sliding rails 21 move to the lower limit position and move upward to reset, the fixed pins 25 slide along the helical grooves of the adjacent fixed rods 24 in the process of resetting of the limiting shells 22, so that the rope collecting members 23 rotate reversely and release the pull ropes 13, and when the electric sliding blocks in the electric sliding rails 21 move upward to the basic state (for reference Figures 4-8 ), it is a cleaning stroke, and the above-mentioned process can be repeated when cleaning is needed, and the supply of solution can be restored after cleaning to realize the separation of subsequent solution.

[0046] In the existing non-scraper pull-bag centrifuge, the local filter cloth will be wrinkled during the pull-bag process, and the filter cloth in the wrinkled area is easy to overlap or accumulate locally, so that the residual solid impurities are difficult to be directly removed by the pull-bag action, thereby affecting the cleaning effect of the filter cloth, and the problem is solved by the following description:

[0047] Example 2

[0048] Based on example 1, please refer to Figure 10 and Figure 11As shown, the electric sliding block of the electric sliding rail 21 is fixed with a connecting frame 26 located outside the limiting shell 22, the connecting frame 26 is fixed with a U-shaped frame 27, the U-shaped frame 27 is fixed with symmetrically distributed connecting pieces 28, the connecting pieces 28 are rotationally connected with extrusion pieces 29, the extrusion pieces 29 are used for extruding the filter cloth 12, the extrusion pieces 29 and the connecting pieces 28 are fixed with torsional springs, two guide pieces 30 are fixed in the rotating shell 11, the fixed rods 24 correspond to the guide pieces 30 one by one, the guide pieces 30 are used for extruding the adjacent and symmetrically distributed extrusion pieces 29, a gap is left between the two adjacent extrusion pieces 29, the cross-sectional area of the guide piece 30 gradually increases from top to bottom, the extrusion pieces 29 oscillate to press the filter cloth 12, the wrinkle area is inwardly depressed, the adhesion between the solid impurities and the surface of the filter cloth 12 is destroyed, and the solid impurities are actively separated, the gap between the two extrusion pieces 29 allows the wrinkle part of the filter cloth 12 to be stretched during the pressing process, and further promotes the active separation of the solid impurities.

[0049] Working principle: in the process of cleaning the solid impurities on the inside of the filter cloth 12, the electric sliding block of the electric sliding rail 21 drives the corresponding limiting shell 22 and the connecting frame 26 and the synchronous movement of the attached parts, the two adjacent extrusion pieces 29 are extruded by the guide piece 30 and then oscillate along the adjacent connecting pieces 28 (the torsional spring is in a force storage state during this process), the two adjacent extrusion pieces 29 oscillate to extrude the filter cloth 12, the wrinkle part of the filter cloth 12 is inwardly depressed (the filter cloth 12 will wrinkle after the lower side of the filter cloth 12 is stretched), so as to promote the active separation of the solid impurities in the wrinkle area from the surface of the filter cloth 12, during the oscillation process of the two adjacent extrusion pieces 29, the gap between the two extrusion pieces 29 allows the wrinkle area to be stretched, further promoting the active separation of the solid impurities, and the extrusion piece 29 is reset and rotated by the action of the torsional spring when it moves upward.

[0050] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A byproduct separation device for the production of vinylene carbonate, comprising a support frame (1), wherein a protective shell (2) and a fixed shell (3) are fixedly connected to the support frame (1), a sealing cover (4) is hinged to the upper side of the protective shell (2), a push rod (5) is hinged between the support frame (1) and the sealing cover (4), a first drive motor (6) is provided on the sealing cover (4), a distributor (7) located inside the protective shell (2) is fixedly connected to the drive shaft of the first drive motor (6), a feed pipe (8) for conveying solution into the distributor (7) is fixedly connected to the sealing cover (4), a clean water pipe (9) is fixedly connected to the sealing cover (4), a drain pipe (10) is fixedly connected to and communicates with the lower side of the protective shell (2), and a rotating shell (11) is rotatably connected inside the protective shell (2), the rotating shell (11) having a porous structure, characterized in that: The rotating shell (11) is provided with a filter cloth (12), a pull rope (13) is arranged between the rotating shell (11) and the filter cloth (12) and is used for extruding the filter cloth (12), the rotating shell (11) is provided with a fixing assembly for fixing the filter cloth (12) on the rotating shell (11), and the fixed shell (3) is provided with a power assembly for driving the rotating shell (11) to rotate. The pull rope (13) is a Dyneema rope, and the pull rope (13) is provided with an elastic steel wire. The power assembly comprises a second driving motor (19), the second driving motor (19) is arranged on the fixed shell (3), the lower side of the rotating shell (11) is fixedly connected with a rotating seat (20), and the rotating seat (20) and the driving shaft of the second driving motor (19) are connected through a belt transmission. The rotating shell (11) is provided with two center-symmetrically distributed electric sliding rails (21), the electric sliding block in the electric sliding rail (21) is fixedly connected with a limiting shell (22), the limiting shell (22) is rotatably connected with a rope collecting piece (23) fixedly connected with the pull rope (13). The rotating shell (11) is fixedly connected with two fixed rods (24), the outer side of the fixed rod (24) is provided with a spiral groove, the fixed rod (24) penetrates through the adjacent rope collecting piece (23), and the rope collecting piece (23) is fixedly connected with a fixed pin (25) sliding along the spiral groove on the outer side of the fixed rod (24).

2. A by-product separation apparatus for use in the production of vinylene carbonate according to claim 1, characterised in that: The fixing assembly comprises a fixing ring (14), the fixing ring (14) is detachably mounted on the upper side of the rotating shell (11), the fixing ring (14) is used for fixing the upper side of the filter cloth (12) on the rotating shell (11), the lower side of the rotating shell (11) is slidably connected with a first sliding ring (15) and a second sliding ring (16) fixedly connected with each other, and the first sliding ring (15) and the second sliding ring (16) are used for fixing the lower side of the filter cloth (12).

3. A by-product separation apparatus for use in the production of vinylene carbonate according to claim 2, characterised in that: The lower side of the rotating shell (11) and the second sliding ring (16) are fixedly connected with an expansion piece (17), and the rotating shell (11) is fixedly connected with a communication pipe (18) in communication with the expansion piece (17).

4. A by-product separation apparatus for use in the production of vinylene carbonate according to claim 1, characterised in that: The electric sliding block of the electric sliding rail (21) is fixedly connected with a connecting frame (26) located on the outer side of the limiting shell (22), the connecting frame (26) is fixedly connected with a U-shaped frame (27), the U-shaped frame (27) is fixedly connected with symmetrically distributed connecting pieces (28), the connecting pieces (28) are rotatably connected with extrusion pieces (29) for extruding the filter cloth (12), and the extrusion pieces (29) and the connecting pieces (28) are fixedly connected with torsional springs.

5. A by-product separation apparatus for use in the production of vinylene carbonate according to claim 4, characterised in that: The rotating shell (11) is fixedly connected with two guide pieces (30), the fixed rod (24) corresponds to the guide piece (30) in one-to-one correspondence, and the guide piece (30) is used for extruding the adjacent and symmetrically distributed extrusion pieces (29).

6. A by-product separation apparatus for use in the production of vinylene carbonate according to claim 5, characterised in that: Adjacent two extrusion pieces (29) are left with a gap, and the cross-sectional area of the guide piece (30) gradually increases from top to bottom.

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