Discharging device for polystyrene oligomer

Abstract

The utility model belongs to the technical field of chemistry, and particularly relates to a polystyrene oligomer discharging device which comprises a devolatilization device and an oligomer collector, a threaded stirring rod is rotatably connected in the devolatilization device, an attaching piece is arranged at the position, located at the foremost end of the stirring rod, of the devolatilization device, the attaching piece is in threaded connection with the stirring rod, and the oligomer collector is arranged in the devolatilization device. The devolatilization device is provided with an air cylinder for pushing the attaching piece at the position of the attaching piece, the attaching piece is pushed by the air cylinder to be attached to the stirring rod, the attaching piece is in sliding connection with the interior of the devolatilization device, the attaching piece is limited by the guide groove, so that the stirring rod rotates, and the groove attached to the attaching piece pushes substances attached to the stirring rod to fall off; the stirring rod is pushed to a second sealing plate through an attaching piece, after the second sealing plate is attached through the attaching piece, the second sealing plate can be automatically opened, and adhered substances can be directly cleaned, so that the stirring rod is convenient and rapid, and the situation that the second sealing plate is disassembled and the whole stirring rod is also disassembled is avoided.

Description

Technical Field

[0001] The utility model discloses a discharge device, in particular to a discharge device for polystyrene oligomers. Background Art

[0002] In the production process of polystyrene products, after the conversion rate of styrene in the polymerization stage reaches a certain level (generally 70% to 80%), it enters the styrene monomer removal stage (abbreviated as devolatilization). At this time, the reaction mixture contains polystyrene, styrene, product additives, oligomers, etc. The styrene and oligomers must be fully removed in the devolatilization stage. After styrene is recovered, it enters the production system for utilization. Oligomers, as an unstable harmful substance, have certain toxicity and unpleasant odor. After being devolatilized, they are discharged into the production waste liquid system. Therefore, oligomers and styrene need to be recovered. At the same time, oligomers are generally recovered in a centralized manner through a collector.

[0003] In the existing technology, when the product or styrene enters the monomer removal stage, a devolatilizer is used to rotate through internal stirring. The working principle of the devolatilizer is to achieve the purpose of devolatilization by achieving a larger gas-liquid contact area and destroying the phase equilibrium between the gas and liquid. Specifically, the devolatilizer uses special separation equipment, such as disc reactors, extruders, kneaders, etc., to enhance the mass transfer process in high-viscosity systems, thereby effectively removing volatile components from polymers. However, after the product rotates in the threaded rod inside the devolatilizer, it is often easy to cause material residue. Because the threaded rod has a curvature, and different chemical substances have different adhesion properties, the adhesion is difficult to clean, so a new solution is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a discharge device for polystyrene oligomers in order to solve the above problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a discharge device for polystyrene oligomers, comprising a devolatilizer and an oligomer collector, wherein a threaded stirring rod is rotatably connected in the devolatilizer, the devolatilizer is provided with a bonding piece at the front end of the stirring rod, the bonding piece is threadedly connected to the stirring rod, the devolatilizer is provided with a cylinder for pushing the bonding piece at the bonding piece, the bonding piece is pushed by the cylinder to fit with the stirring rod, the bonding piece is slidably connected to the inside of the devolatilizer, the devolatilizer is provided with a pushing component for driving the bonding piece to fit with the stirring rod, the devolatilizer is provided with a detachable closing plate 1 at the front end of the stirring rod, the devolatilizer is provided with a closing plate 2 at the end of the stirring rod, a connecting component for fixing the closing plate 2 is provided between the devolatilizer and the closing plate 2, and the bonding piece is provided with a plug-in for releasing the connection between the devolatilizer and the closing plate 2.

[0006] Preferably, the pushing assembly includes a sensor arranged at the end of the devolatilizer for sensing the expected signal, the cylinder passes through a closing plate, the cylinder is provided with a controller for receiving the sensor signal, and the devolatilizer is provided with a switch for controlling the cylinder and connected to the controller.

[0007] Preferably, a guide groove for guiding the movement of the laminating sheet is provided in the devolatilizer, and a protrusion embedded in the guide groove is provided on the laminating plate.

[0008] Preferably, the connecting assembly includes a card slot provided on the second closing plate, a limit block embedded in the card slot and pushed by the plug-in is provided on the devolatilizer, an abutting block abutting the devolatilizer is provided on the second closing plate, a push rod for pushing the abutting block is slidably connected in the devolatilizer, the limit block is located between the abutting block and the push rod, the limit block is provided with a through hole staggered with the push rod, and a spring 1 is provided between the push rod and the devolatilizer.

[0009] Preferably, a fixing block is provided on the second closing plate, a telescopic rod is provided in the devolatilizer, thread grooves are provided on the fixing block and the telescopic rod, and a thread block embedded in the thread groove is provided on the fixing block.

[0010] Preferably, a discharge pipe for styrene and oligomers is provided outside the devolatilizer, the delivery pipe is connected to the oligomer collector at one end away from the devolatilizer, and a styrene recovery device is provided at the other end, the oligomer collector is externally connected to a pipe for accommodating oxygen entry, and the oligomer collector is provided with an outlet for discharging oligomer waste liquid.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] After using this device, the material is stirred and rotated to remove the volatiles of the polymer, and all the internal materials are squeezed out through the spiral stirring rod. Because some liquid or fixed adhesive adheres to the spiral stirring rod, the spiral stirring rod is reset and the cylinder is driven to make the mouth of the bonding sheet face and embed with the upper end of the stirring rod. At this time, the stirring rod is turned on and rotated, so that the stirring rod can be embedded in the groove of the bonding sheet and the bonding sheet is pushed and moved by the spiral stirring rod. Because the bonding sheet is restricted by the guide groove, the stirring rod will rotate, and the groove of the bonding sheet will push the material adhered to the stirring rod to fall off, and then push it to the second closing plate through the bonding sheet. After the bonding sheet adheres to the second closing plate, the second closing plate will automatically open and the adhered material can be cleaned directly. This is convenient and quick, and there is no need to disassemble the second closing plate or the entire stirring rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic structural diagram of a device for discharging polystyrene oligomers;

[0014] Figure 2 This is a schematic structural diagram of a devolatilizer for discharging polystyrene oligomers;

[0015] Figure 3 for Figure 2 A local enlarged view at point A;

[0016] Figure 4 This is a partial structural diagram of a devolatilizer of a polystyrene oligomer discharge device;

[0017] Figure 5 for Figure 4 A partial enlarged view at point B.

[0018] Figure numerals: 1. devolatilizer; 2. oligomer collector; 3. conveying pipe; 4. stirring rod; 5. bonding sheet; 6. cylinder; 7. closing plate 1; 8. closing plate 2; 9. plug-in; 10. sensor; 11. controller; 12. switch 1; 13. guide groove; 14. protrusion; 15. slot; 16. limit block; 17. abutment block; 18. push rod; 19. perforation; 20. spring 1; 21. fixing block; 22. telescopic rod; 23. threaded block; 24. pipe 1. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] A device for discharging polystyrene oligomers, such as Figure 1-Figure 3As shown, it includes a devolatilizer 1 and an oligomer collector 2. A threaded stirring rod 4 is rotatably connected in the devolatilizer 1. A bonding piece 5 is provided at the front end of the stirring rod 4 in the devolatilizer 1. The bonding piece 5 is threadedly connected to the stirring rod 4. A cylinder 6 for pushing the bonding piece 5 is provided at the bonding piece 5 in the devolatilizer 1. The bonding piece 5 is pushed to fit the stirring rod 4 by the cylinder 6. The bonding piece 5 is slidably connected to the inside of the devolatilizer 1. A pushing component for driving the bonding piece 5 to fit the stirring rod 4 is provided on the devolatilizer 1. A closing plate 1 7 is detachably connected to the front end of the stirring rod 4 in the devolatilizer 1. A closing plate 2 8 is provided at the end of the stirring rod 4 in the devolatilizer 1. A connecting assembly for fixing the closing plate 2 8 is provided between the devolatilizer 1 and the closing plate 2 8, and a plug 9 for releasing the connection between the devolatilizer 1 and the closing plate 2 8 is provided on the bonding sheet 5. In normal use of this device, after removing the volatile components of the polymer by rotating, stirring, and extruding the devolatilizer 1, the extruded material is transferred to a subsequent step for standing or recycling. However, because chemical substances such as polymers, liquid substances or solid substances are adhesive, some substances may adhere to the spiral stirring rod 4, which is inconvenient to clean. In the prior art, the entire devolatilizer 1 generally needs to be disassembled for cleaning, which is inconvenient.

[0021] The pushing component includes a sensor 10 arranged at the end of the devolatilizer 1 for sensing the expected material, the cylinder 6 passes through the closing plate 7, the cylinder 6 is provided with a controller 11 for receiving the signal of the sensor 10, the devolatilizer 1 is provided with a switch 12 for controlling the cylinder 6 and connected to the controller 11, the devolatilizer 1 is provided with a guide groove 13 for guiding the movement of the bonding sheet 5, and the bonding plate is provided with a protrusion 14 embedded in the guide groove 13. After using this device, after the rotation of the stirring rod 4 of the devolatilizer 1 is completed and the sensor 10 can no longer sense the internal material, the signal is output to the controller 11 and the switch 12 is turned on, so that the cylinder 6 is turned on and pushed forward to push the bonding sheet 5 to the spiral stirring rod 4, and the groove on the bonding sheet 5 will be directly embedded in the front end of the stirring rod 4, and then the stirring rod 4 is turned on and rotated again. Because the bonding sheet 5 passes through the guide groove 13 and the protrusion 14 is embedded in the guide groove 13, the bonding sheet 5 is moved. After the restriction of block 14, it cannot rotate but can only move. Therefore, after the stirring rod 4 rotates, the spiral part will push the bonding sheet 5 forward along the groove of the bonding sheet 5, and the threaded part of the stirring rod 4 moves along the groove of the bonding sheet 5 to push down the material adhered to the surface. By continuously rotating the stirring rod 4 to the end, the material adhered to the entire stirring rod 4 can be cleaned up, and secondly, the material adhered to the inside of the devolatilizer 1 will be cleaned together. With this arrangement, there is no need to open the entire body, and there is no need to disassemble the stirring rod 4 for cleaning. It is convenient and fast to save time and improve work efficiency. At the same time, after the bonding sheet 5 is moved and cleaned, the stirring rod 4 can be reversed to drive the bonding sheet 5 to reset. After resetting, it is adhered to the rod of the cylinder 6 through magnetic attraction. Resetting the cylinder 6 can drive the bonding plate to reset, and when the stirring rod rotates, the rotating force is greater than the magnetic force, which will separate the bonding sheet 5 from the cylinder 6.

[0022] The connecting assembly includes a card slot 15 provided on the closing plate 2 8, a limit block 16 is provided on the devolatilizer 1 and is embedded in the card slot 15 and is pushed by the plug 9, an abutment block 17 is provided on the closing plate 2 8 to abut the devolatilizer 1, and a push rod 18 for pushing the abutment block 17 is slidably connected in the devolatilizer 1, the limit block 16 is located between the abutment block 17 and the push rod 18, a through hole 19 is provided on the limit block 16 and is misaligned with the push rod 18, a spring 20 is provided between the push rod 18 and the devolatilizer 1, a fixing block 21 is provided on the closing plate 2 8, a telescopic rod 22 is provided in the devolatilizer 1, and the fixing block 21 and the telescopic rod 2 2 is provided with a thread groove, and the fixing block 21 is provided with a thread block 23 embedded in the thread groove. At the same time, after the fitting piece 5 moves to the end of the stirring rod 4, it will fit with the closing plate 2 8 and the driving plug-in 9 will be embedded in the card groove 15, pushing the limit block 16 outward to disengage from the card groove 15 of the closing plate 2 8 to cancel the restriction on the closing plate 2 8. After the restriction of the closing plate 2 8 is released, the limit block 16 moves up and the perforation 19 is opposite to the push rod 18, and the push rod 18 is separated from the restriction of the limit block 16 and is pushed by the spring 1 20 to abut against the abutment block 17, pushing the abutment block 17 outward to drive the closing plate 2 8 to separate from the devolatilizer 1, so as to achieve the desired effect. This can accommodate the laminating sheet 5 to be taken out and cleaned, thereby convenient and quick to clean. At the same time, after the closing plate 28 is pushed outward by the pushing rod 18, the telescopic rod 22 will be pulled outward, and the telescopic rod 22 is embedded in the fixing block 21 through the threaded block 23. Secondly, the fixing block 21 is connected to the closing plate 28 to ensure that the closing plate 28 is pushed by the pushing rod 18 to move stably and will not fall off or loosen. On the contrary, by directly pressing the closing plate 28 to re-fit and embed it into the devolatilizer 1, and after the laminating sheet 5 is pushed back by the spiral stirring rod 4, the plug-in 9 also moves, and at the same time the limit block 16 is re-engaged with the card slot 15 The spring pushes the push rod 18 downward to reset it, and the limit block 16 re-inserts into the slot 15 to achieve fixation. The force of the spring is greater than the force of the spring 120 at the rear end of the push rod 18, and the force of the bonding sheet 5 plug-in 9 being embedded is greater than the force of the spring on the limit block 16. Secondly, the force of the spring pushing the limit block 16 downward is also greater than the material extrusion force, thereby ensuring that the limit block 16 will not move upward when the material is discharged, and the bonding sheet 5 will move upward after being embedded. After the bonding sheet 5 and the plug-in 9 are reset, the elastic force of the spring at the rear end of the limit block 16 overcomes the force of the spring 120 to reset the push rod 18 and the limit block 16. This arrangement makes it convenient for the bonding sheet 5 to move to clean the stirring rod 4, and the corresponding closing plate 2 8 will automatically open, making it convenient to clean the bonding sheet 5.

[0023] The devolatilizer 1 is provided with a discharge pipe 3 for styrene and oligomers. The delivery pipe 3 is connected to the oligomer collector 2 at one end away from the devolatilizer 1, and a styrene recovery device is provided at the other end. The oligomer collector 2 is connected to a pipe 24 for accommodating the entry of oxygen. The oligomer collector 2 is provided with an outlet for discharging oligomer waste liquid. At the same time, the devolatilizer 1 stirs and discharges the materials and uniformly enters a convergence position, which can be a tank or a storage tank, so as to facilitate cleaning. Secondly, styrene and oligomers are discharged by extraction or discharge along the delivery pipe 3, and the oligomers are discharged and gathered into the oligomer collector 2 respectively. At the same time, styrene is also gathered and recovered in a special storage position for styrene, and oxygen enters the oligomer collector 2 through a pipe 24 for synthesis or reaction, and some oligomer waste liquid is discharged along the outlet for recovery and unified treatment.

[0024] After using the above device, the sensor 10 outputs a signal after sensing no material and the stirring rod 4 stops rotating. Then the sensor 10 outputs a signal to the controller 11 so that the switch 12 is turned on, and the cylinder 6 is controlled to start and push the bonding sheet 5 toward the stirring rod 4 to abut against the spiral part of the stirring rod 4. Then the stirring rod 4 is rotated and embedded in the groove of the bonding sheet 5. After the stirring rod 4 is continuously rotated, the bonding sheet 5 is pushed. At the same time, the threaded part of the stirring rod 4 moves along the groove of the bonding sheet 5, and the impurities adhering to the moving stirring rod 4 will be hung off by the bonding sheet 5, thereby achieving the cleaning of the stirring rod 4. The effect is that there is no need to disassemble the stirring rod 4. Secondly, when the bonding sheet 5 is bonded to the closing plate 2 8, the plug-in 9 of the bonding sheet 5 is embedded in the card slot 15, thereby pushing the limit block 16 upward and facing the push rod 18 through the perforation 19. At this time, the spring 1 20 will push the push rod 18 to the abutment block 17, and drive the abutment block 17 to move outward and drive the closing plate 2 8 to open, so that the bonding sheet 5 can be taken out and cleaned separately. Compared with the existing technology, there is no need to disassemble the entire body or the stirring rod 4, which is convenient and fast, improves work efficiency and saves time.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for discharging polystyrene oligomers, comprising a devolatilizer (1) and an oligomer collector (2), wherein a threaded stirring rod (4) is rotatably connected to the devolatilizer (1), and characterized in that: The devolatilizer (1) is provided with a bonding sheet (5) at the front end of the stirring rod (4), and the bonding sheet (5) is threadedly connected to the stirring rod (4). The devolatilizer (1) is provided with a cylinder (6) for pushing the bonding sheet (5) at the bonding sheet (5), and the bonding sheet (5) is pushed by the cylinder (6) to fit with the stirring rod (4). The bonding sheet (5) is slidably connected to the inside of the devolatilizer (1). The devolatilizer (1) is provided with a pushing component for driving the bonding sheet (5) to fit with the stirring rod (4). The devolatilizer (1) is provided with a detachable closing plate (7) at the front end of the stirring rod (4). The devolatilizer (1) is provided with a closing plate (8) at the end of the stirring rod (4). A connecting component for fixing the closing plate (8) is provided between the devolatilizer (1) and the closing plate (8). The bonding sheet (5) is provided with a plug-in (9) for releasing the connection between the devolatilizer (1) and the closing plate (8).

2. The polystyrene oligomer discharge device according to claim 1, characterized in that: The pushing assembly includes a sensor (10) arranged at the end of the devolatilizer (1) for sensing an expected state, the cylinder (6) passes through a closing plate (7), a controller (11) is provided on the cylinder (6) for receiving a signal from the sensor (10), and a switch (12) is provided on the devolatilizer (1) for controlling the cylinder (6) and connected to the controller (11).

3. The polystyrene oligomer discharge device according to claim 1, characterized in that: A guide groove (13) for guiding the movement of the bonding sheet (5) is provided in the devolatilizer (1), and a protrusion (14) embedded in the guide groove (13) is provided on the bonding sheet (5).

4. The polystyrene oligomer discharge device according to claim 1, characterized in that: The connecting assembly includes a card slot (15) provided on the second closing plate (8), a limit block (16) embedded in the card slot (15) and pushed by the plug-in unit (9) is provided on the devolatilizer (1), an abutting block (17) abutting the devolatilizer (1) is provided on the second closing plate (8), a push rod (18) for pushing the abutting block (17) is slidably connected in the devolatilizer (1), the limit block (16) is located between the abutting block (17) and the push rod (18), a through hole (19) misaligned with the push rod (18) is provided on the limit block (16), and a spring (20) is provided between the push rod (18) and the devolatilizer (1).

5. The polystyrene oligomer discharge device according to claim 4, characterized in that: A fixing block (21) is provided on the second closing plate (8), a telescopic rod (22) is provided in the devolatilizer (1), thread grooves are provided on the fixing block (21) and the telescopic rod (22), and a thread block (23) embedded in the thread groove is provided on the fixing block (21).

6. The polystyrene oligomer discharge device according to claim 1, characterized in that: The devolatilizer (1) is provided with a discharge pipe styrene and oligomer delivery pipe (3) outside, the delivery pipe (3) is connected to the oligomer collector (2) at one end away from the devolatilizer (1), and a styrene recovery device is provided at the other end, the oligomer collector (2) is externally connected to a pipe (24) for accommodating oxygen entry, and the oligomer collector (2) is provided with an outlet for discharging oligomer waste liquid.

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