Polystyrene particle preparation device and method
By using chemicals such as polyvinyl alcohol, dibenzoyl peroxide and phenoamine chain transfer agents in the production of polystyrene pellets, combined with the main cylinder and gear meshing stirring and piston extrusion equipment, the existing equipment has been solved, and efficient and low-cost polymerization reaction and material cooling treatment have been achieved.
Patent Information
- Application Number
- CN202510702133.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2025-08-29
AI Technical Summary
In the existing polystyrene pellet production process, the mixing equipment has a single structure and low efficiency, the screw extruder covers a large area and is cost-effective, the energy consumption of the material granulation process, and the inaccurate heat transfer control of the polymerization kettle leads to local overheating affecting production.
Polyvinyl alcohol is used as the dispersant, dibenzoyl peroxide is used as the initiator, phenolamine chain transfer agent and epoxidized oil stabilizer, combined with the stirring structure of the main cylinder, internal tooth ring and gear meshing, and combined with the piston extrusion equipment and cooling system, the material is fully stirred, continuous extruded and rapid cooling.
It improves the polymerization reaction efficiency, reduces the equipment space and usage cost, ensures material quality, and avoids material degradation caused by local temperature overheating.
Smart Images
Figure CN120550719A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of chemical production, and in particular to a device and method for preparing polystyrene particles. Background Art
[0002] Polystyrene particles, referred to as PS particles, are a thermoplastic plastic material made from styrene monomer through polymerization reaction. They usually appear as white or transparent beads or granules in solid form. They can be divided into general-grade polystyrene and expandable polystyrene. General-grade polystyrene is colorless, transparent, odorless and tasteless with high gloss. It is often used in transparent containers, optical devices and other products. Expandable polystyrene is white or transparent beads with foaming agent added. After expansion and foaming, it can be made into lightweight foam material. It is widely used in insulation, packaging and other fields. It is a very widely used chemical material.
[0003] In the existing production and preparation process of polystyrene particles, the existing polystyrene particles are generally prepared by a polymerization reaction production method. During the polymerization reaction, a stirring device is required to accelerate the mixing of the raw materials and the progress of the polymerization reaction. The existing polymerization kettle has a single mixing and stirring structure, and the usage method and efficiency are fixed. At the same time, the polymerized material needs to be extruded and granulated using a screw extruder. The screw extruder has a large structure, high usage cost, and occupies a large space. The material granulation process requires secondary heating and has high energy consumption. In addition, during the material polymerization reaction process, the heat transfer and thermal mixing efficiency of the polymerization kettle need to be precisely controlled. Without precise control, local overheating will cause material degradation temperature, affecting production. For this reason, we propose a polystyrene particle preparation device and method. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a polystyrene particle preparation device and method, which adopts styrene monomer as raw material, polyvinyl alcohol as dispersant, dibenzoyl peroxide as initiator, and phenolamine chain transfer agent as chain transfer to improve polymerization efficiency, and adopts epoxidized oil stabilizer to stabilize the reaction process and play a certain plasticizing role, thereby finally improving the molding efficiency and quality of polystyrene particles. During the deep polymerization reaction, the main cylinder drives the bottom ring and the insertion rod to move downward through the connecting ring and the connecting rod, and at the same time the inner gear ring is engaged with the outer periphery of the gear. During the rotation of the transmission shaft, the gear can drive the rotation of the inner gear ring, the bottom ring, the insertion rod and the rotating ring, so that the insertion rod can cooperate with the stirring shaft to fully stir and mix the materials, further accelerating the polymerization reaction efficiency, and the molten material after the deep polymerization reaction is transported to the inside of the feeding barrel under the action of the feeding equipment, and the extrusion motor drives the rotation of the crankshaft when it is running. The connecting arm drives the pistons inside the discharge barrels on both sides to run alternately. When the piston retracts to the side of the power box, the one-way door A opens to inhale the material. When the piston is squeezed to the side of the feed box, the one-way door B opens to extrude the material. In conjunction with the die head, a motor-driven piston structure is used as the extrusion equipment, which greatly reduces the space occupied and the use cost of the extrusion equipment. The double discharge barrels are used in conjunction with the alternating operation of the pistons to achieve continuous and stable extrusion of the material and reduce the granulation cost. When the temperature inside the polymerization kettle rises above the warning value, the main cylinder lifts the connecting ring to separate the inner gear ring from the gear. At the same time, the bottom end of the rod is still inside the material, and the power end of the auxiliary cylinder is pressed down until the socket and the connecting seat are docked. The pump body draws part of the cooling water inside the pelletizer from the diverter pipe into the cavity, and circulates along the preset flow channel, which can quickly cool the material inside the polymerization kettle to avoid local overheating inside the polymerization kettle and degradation of the material, thereby achieving rapid cooling of the material in the kettle and ensuring the quality of the material.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A polystyrene particle preparation device includes a polymerization kettle, a main motor, a feed box, a fixed seat and a pump body. The main motor is installed in the middle position of the top of the polymerization kettle, and the power output end of the main motor is installed with a stirring shaft located inside the polymerization kettle through a transmission shaft. The outer periphery of the stirring shaft is fixed with a gear through a flat key. Main cylinders are installed on both sides of the top of the polymerization kettle, and a connecting ring located inside the polymerization kettle is installed between the power output ends of the main cylinders. The bottom of the connecting ring is movably connected to a bottom ring and an internal gear ring is embedded in the bottom ring. A plug rod is welded to the bottom of the bottom ring.
[0007] Preferably, a power box is provided on one side of the feed box and the power box is connected to the feed box through a symmetrically arranged discharge barrel. An extrusion motor is installed on the side of the feed box and a crankshaft located inside the power box is installed on the power output end of the extrusion motor. The surface of the crankshaft is movably connected to a piston inserted into the discharge barrel through a connecting arm. A discharge pipe is provided at the discharge end of the feed box and a die head is detachably connected to the end of the discharge pipe. A pelletizer is provided on the side of the die head away from the feed box. When the extrusion motor is running, the crankshaft and the connecting arm drive the linear reciprocating motion of the piston inside the discharge barrel, and the pistons inside the discharge barrels on both sides operate alternately. When retracting, the material is sucked into the discharge barrel. When extending, the material is squeezed into the discharge box and extruded by the die head and granulated with the pelletizer. The piston structure is used for continuous extrusion and pelletizing operations, which greatly reduces the space occupied and the use cost of the equipment.
[0008] Preferably, cavities are provided inside the bottom ring and the insertion rod, a partition is welded inside the bottom ring between the bottom ends of the insertion rod, a water supply pipe is installed in the cooling section of the pelletizer, a diverter pipe connected to the pump body is provided on one side of the surface of the water supply pipe, a fixing seat is fixedly connected to the inside of the polymerization kettle, and a water inlet pipe and a drain pipe connected to the pump body are provided on the top of the fixing seat; the cavity, partition and other structures cooperate to form a one-way flow channel inside the bottom ring and the insertion rod, and when the pump body is running, part of the cooling water is pumped into the cooling channel by the diverter pipe, and the insertion rod is used as a cooling component to quickly cool the material inside the polymerization kettle to avoid the problem of material degradation.
[0009] Preferably, the top of the polymerization kettle is equipped with a perspective window for observing the interior of the polymerization kettle, a bearing is embedded in the connecting ring and a swivel is movably connected to the connecting ring through the bearing, connecting rods are welded on both sides of the bottom of the swivel and connected to the top of the bottom ring through the connecting rods, and the inner gear ring matches the gear; the perspective window is convenient for observing the internal situation of the polymerization kettle and determining the alignment between the socket and the connecting seat. Under the action of the bearing, the swivel can rotate inside the connecting ring and drive the rotation of the bottom ring through the connecting rod, thereby realizing the synchronous rotation of the inserted rod and the stirring shaft.
[0010] Preferably, a one-way door A is movably connected to the inside of the feed barrel near the side of the discharge barrel, and the one-way door A opens one-way toward the inside of the discharge barrel. A one-way door B is movably connected to the inside of the discharge barrel near the side of the feed box, and the one-way door B opens one-way toward the inside of the feed box. Through the designed one-way door structure, combined with the reciprocating motion of the piston, the piston can continuously suck and extrude the material during the movement, ensuring continuous extrusion and discharge.
[0011] Preferably, a socket is movably connected to the bottom of the fixed seat and a corrugated hose is installed between the fixed seat and the socket, a sub-cylinder is installed on the top of the polymerization kettle and the power output end of the sub-cylinder is connected to the side of the socket, and a recovery pipe is installed at the discharge end of the pump body connected to the drain pipe; the corrugated hose plays a connecting role and does not affect the change of the distance between the fixed seat and the socket. The sub-cylinder controls the vertical movement of the socket, and the recovery pipe discharges the used cooling water for recycling after treatment.
[0012] Preferably, the bottom ends of the insertion rods are welded with connecting tubes and are connected to the inside of the cavity through the connecting tubes, and the partitions spaced inside the bottom ring are provided with through holes; the connecting tubes serve as a connection between the bottom ends of the insertion rods and cooperate with the through hole structure inside the partitions to allow cooling water to flow in one direction.
[0013] Preferably, an inlet pipe connected to the interior of the cavity is provided on the top of the bottom ring, and an outlet pipe connected to the interior of the through hole is provided on the side of the top of the bottom ring close to the inlet pipe, and a connecting seat corresponding to the position of the socket is installed between the top of the inlet pipe and the outlet pipe; the inlet pipe and the outlet pipe are used to circulate cooling water inside the bottom ring, and through the connecting seat structure, it is convenient to dock with the socket structure to realize the connection between the pipelines.
[0014] Preferably, the method for preparing polystyrene particles comprises the following steps:
[0015] S1. Raw material preparation and processing: prepare styrene monomer as the main raw material, prepare dispersant, initiator and other additives, use deionized water to deeply soak and clean the styrene monomer, remove impurities attached to the surface of the styrene monomer and other adhesives that may affect the polymerization reaction, ensure the normal progress of the polymerization reaction, and dehydrate the styrene monomer after deep cleaning. After dehydration, it will be set aside.
[0016] S2. Polyvinyl alcohol is used as a dispersant, dibenzoyl peroxide is used as an initiator, the dispersant and initiator are mixed with styrene monomer, and the mixture is added into the polymerization kettle. At the same time, a phenolamine chain transfer agent is used for chain transfer, and an epoxidized oil stabilizer is used to stabilize the reaction process and to play a certain plasticizing role. After the raw materials are added, the main motor is controlled to operate, and the stirring shaft is driven to rotate by the transmission shaft. At the same time, steam heating is used to raise the temperature in the kettle to 100-110°C, and a prepolymerization reaction is carried out under normal pressure.
[0017] S3. After the prepolymerization reaction, the internal temperature of the polymerization kettle is slowly and uniformly increased, and the stirring shaft is used to stir and mix inside the polymerization kettle to accelerate the polymerization reaction. When the internal temperature of the polymerization kettle rises to 160°C, the raw materials in the kettle complete deep polymerization. During the deep polymerization reaction, the main cylinder can be controlled to operate, and its power output end moves downward to drive the bottom ring and the insertion rod to move downward through the connecting ring and the connecting rod. The insertion rod continuously extends into the interior of the material while the inner gear ring continuously moves downward until it engages with the outer periphery of the gear. At this time, during the process of the main motor driving the transmission shaft to rotate, the gear can drive the rotation of the inner gear ring, the bottom ring, the insertion rod and the rotating ring, so that the insertion rod can cooperate with the stirring shaft to fully stir and mix the material, further accelerating the polymerization reaction efficiency.
[0018] S4. The molten material after the deep polymerization reaction is transported to the inside of the feed barrel under the action of the feeding equipment, and the extrusion motor is turned on. When it is running, it drives the rotation of the crankshaft and then drives the movement of the piston inside the discharge barrel through the connecting arm. The pistons inside the discharge barrels on both sides run alternately. When the piston retracts to the side of the power box, the one-way door A opens, and the material inside the feed pipe is sucked into the inside of the discharge barrel. When the piston is squeezed to the side of the feed box, the one-way door A closes and the one-way door B opens, so that the material inside the discharge barrel enters the inside of the feed box and is squeezed into the discharge pipe. The material discharged from the discharge pipe is discharged through the die head and then quickly pelletized by the pelletizer. After cooling, polystyrene particles are formed. Electric heating components are provided inside the feed pipe, discharge pipe and feed box to maintain the internal temperature.
[0019] S5. During the pelletizing process, the external cooling water circulation equipment injects cooling water into the pelletizer through the water supply pipe to accelerate the cooling and shaping of the pelletized product. During the deep polymerization process, the temperature monitoring component inside the polymerization kettle is set to monitor the temperature changes inside the polymerization kettle in real time. When the temperature rises above the warning value, the position of the connecting seat inside the polymerization kettle is observed through the perspective window. When the connecting seat is aligned with the socket, the main motor is stopped, the main cylinder lifts the connecting ring to separate the inner gear ring from the gear while the bottom end of the plug rod is still inside the material, the auxiliary cylinder presses the socket down until the socket and the connecting seat are docked, the corrugated hose is stretched, and the pump body runs, drawing part of the cooling water into the diversion pipe, and then into the cavity through the water inlet pipe, fixed seat, corrugated hose, socket, connecting seat and inlet pipe, and circulates along the preset flow channel, which can quickly cool the material inside the polymerization kettle to avoid local overheating inside the polymerization kettle causing material degradation and affecting the quality of subsequent pellets. The used cooling water is then discharged by the pump body component.
[0020] The beneficial effects of the present invention are as follows:
[0021] Styrene monomer is used as raw material, polyvinyl alcohol is used as dispersant, dibenzoyl peroxide is used as initiator, and phenolamine chain transfer agents are used as chain transfer agents to improve polymerization efficiency. Epoxidized oil stabilizers are used to stabilize the reaction process and play a certain plasticizing role, ultimately improving the molding efficiency and quality of polystyrene particles. During the deep polymerization reaction, the main cylinder drives the bottom ring and the plug rod to move downward through the connecting ring and the connecting rod. At the same time, the inner gear ring is engaged with the outer periphery of the gear. During the rotation of the transmission shaft, the gear can drive the rotation of the inner gear ring, the bottom ring, the plug rod and the rotating ring, so that the plug rod can cooperate with the stirring shaft to fully stir and mix the materials, further accelerating the polymerization reaction efficiency. The molten material after the deep polymerization reaction is transported to the inside of the feeding barrel under the action of the feeding equipment. When the extruder motor is running, it drives the rotation of the crankshaft and then drives the pistons inside the discharge barrels on both sides to move alternately through the connecting arm. When the piston retracts toward the power box side, the one-way door A opens to inhale the material. When the piston is squeezed toward the feed box side, the one-way door B opens to extrude the material. In conjunction with the die head, a motor-driven piston structure is used as the extrusion equipment, which greatly reduces the space occupied and the use cost of the extrusion equipment. The double discharge barrels are used in conjunction with the alternating operation of the pistons to achieve continuous and stable extrusion of the material and reduce the granulation cost. When the temperature inside the polymerization kettle rises above the warning value, the main cylinder lifts the connecting ring to separate the inner gear ring from the gear. At the same time, the bottom end of the rod is still inside the material, and the power end of the auxiliary cylinder is pressed down until the socket and the connecting seat are docked. The pump body draws part of the cooling water inside the pelletizer into the cavity through the diverter pipe, and circulates along the preset flow channel, which can quickly cool the material inside the polymerization kettle to avoid local overheating inside the polymerization kettle and degradation of the material, thereby achieving rapid cooling of the material in the kettle and ensuring the quality of the material. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The figure is a schematic diagram of the overall structure of a polystyrene particle preparation device of the present invention.
[0023] Figure 2 This is a structural schematic diagram of a polystyrene particle preparation device of the present invention in which the bottom ring and gear inside the polymerization kettle are separated.
[0024] Figure 3 This is a structural schematic diagram of a polystyrene particle preparation device of the present invention in which the bottom ring inside the polymerization kettle is in meshing state with the gear.
[0025] Figure 4 This is a schematic structural diagram of the connecting ring and bottom ring of a polystyrene particle preparation device of the present invention.
[0026] Figure 5 The figure is a schematic diagram of the internal structure of the feed box and power box of a polystyrene particle preparation device of the present invention.
[0027] Figure 6 This is a structural schematic diagram of a polystyrene particle preparation device of the present invention when the piston is in a retracted state.
[0028] Figure 7 This is a structural schematic diagram of a polystyrene particle preparation device of the present invention with the piston in an extended state.
[0029] Figure 8 The figure is a schematic diagram of the internal flow channel structure of the bottom ring of a polystyrene particle preparation device of the present invention.
[0030] In the figure: 1. Polymerization kettle; 101. Window; 2. Main motor; 201. Transmission shaft; 202. Stirring shaft; 203. Gear; 204. Main cylinder; 205. Connecting ring; 206. Bearing; 207. Rotating ring; 208. Connecting rod; 209. Bottom ring; 210. Internal gear ring; 211. Insert rod; 3. Feed box; 301. Power box; 302. Discharge barrel; 303. Extrusion motor; 304. Crankshaft; 305. Connecting arm; 306. Piston; 307. Feed barrel; 30 8. One-way door A; 309. One-way door B; 310. Discharge pipe; 311. Die head; 312. Pelletizer; 4. Fixed seat; 401. Water inlet pipe; 402. Drain pipe; 403. Corrugated hose; 404. Socket; 405. Auxiliary cylinder; 406. Water supply pipe; 407. Diverter pipe; 408. Pump body; 409. Recovery pipe; 410. Cavity; 411. Connecting pipe; 412. Partition; 413. Through hole; 414. Inlet pipe; 415. Discharge pipe; 416. Connecting seat. DETAILED DESCRIPTION
[0031] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.
[0032] Example 1
[0033] A polystyrene particle preparation device includes a polymerization kettle 1, a main motor 2, a feed box 3, a fixed seat 4 and a pump body 408. The main motor 2 is installed in the middle position of the top of the polymerization kettle 1, and the power output end of the main motor 2 is installed with a stirring shaft 202 located inside the polymerization kettle 1 through a transmission shaft 201. The outer periphery of the stirring shaft 202 is fixed with a gear 203 through a flat key. Main cylinders 204 are installed on both sides of the main motor 2 on the top of the polymerization kettle 1, and a connecting ring 205 located inside the polymerization kettle 1 is installed between the power output ends of the main cylinder 204. The bottom of the connecting ring 205 is movably connected to a bottom ring 209, and an inner gear ring 210 is embedded in the bottom ring 209. The bottom of the bottom ring 209 is welded with an insertion rod 211.
[0034] Among them, a power box 301 is provided on one side of the feeding box 3, and the power box 301 is connected to the feeding box 3 through a symmetrically arranged discharge barrel 302. An extrusion motor 303 is installed on the side of the feeding box 3, and a crankshaft 304 located inside the power box 301 is installed at the power output end of the extrusion motor 303. The surface of the crankshaft 304 is movably connected to a piston 306 inserted into the discharge barrel 302 through a connecting arm 305. A discharge pipe 310 is provided at the discharge end of the feeding box 3, and a die head 311 is detachably connected to the end of the discharge pipe 310. The die head 3 A pelletizer 312 is provided on the side 11 away from the feeding box 3; when the extrusion motor 303 is running, the crankshaft 304 and the connecting arm 305 drive the linear reciprocating motion of the piston 306 inside the discharge barrel 302, and the pistons 306 inside the discharge barrels 302 on both sides operate alternately. When retracting, the material is sucked into the discharge barrel 302, and when extending, the material is squeezed into the discharge box and extruded by the die head 311 and granulated with the pelletizer 312. The piston 306 structure is used for continuous extrusion and granulation operations, which greatly reduces the space occupied and the use cost of the equipment.
[0035] Among them, the top of the polymerization kettle 1 is equipped with a perspective window 101 for observing the interior of the polymerization kettle 1, the connecting ring 205 is embedded with a bearing 206 and is movably connected to a swivel 207 through the bearing 206, and connecting rods 208 are welded on both sides of the bottom of the swivel 207 and are connected to the top of the bottom ring 209 through the connecting rod 208, and the inner gear ring 210 matches the gear 203; the perspective window 101 is convenient for observing the internal situation of the polymerization kettle 1 and determining the alignment between the socket 404 and the connecting seat 416. Under the action of the bearing 206, the swivel 207 can rotate inside the connecting ring 205 and drive the rotation of the bottom ring 209 through the connecting rod 208, thereby realizing the synchronous rotation of the insertion rod 211 and the stirring shaft 202.
[0036] Among them, a one-way door A308 is movably connected to the inside of the feeding cylinder 307 near the side of the discharging cylinder 302, and the one-way door A308 opens one-way toward the inside of the discharging cylinder 302. A one-way door B309 is movably connected to the inside of the discharging cylinder 302 near the side of the feeding box 3, and the one-way door B309 opens one-way toward the inside of the feeding box 3. Through the designed one-way door structure, combined with the reciprocating motion of the piston 306, the piston 306 can continuously suck and extrude materials during the movement, ensuring continuous extrusion and discharge.
[0037] The method for preparing polystyrene particles comprises the following steps:
[0038] S1. Raw material preparation and processing: prepare styrene monomer as the main raw material, prepare dispersant, initiator and other additives, use deionized water to deeply soak and clean the styrene monomer, remove impurities attached to the surface of the styrene monomer and other adhesives that may affect the polymerization reaction, ensure the normal progress of the polymerization reaction, and dehydrate the styrene monomer after deep cleaning. After dehydration, it will be set aside.
[0039] S2, using polyvinyl alcohol as a dispersant, using dibenzoyl peroxide as an initiator, the dispersant and initiator are mixed with styrene monomer, and put into the inside of the polymerization kettle 1, while using phenolamine chain transfer agents as chain transfer agents, and using epoxidized oil stabilizers to stabilize the reaction process and have a certain plasticizing effect. After the raw materials are put into the reactor, the main motor 2 is controlled to run, and the driving shaft 201 drives the rotation of the stirring shaft 202. At the same time, steam heating is used to raise the temperature in the reactor to 100-110 ° C, and a prepolymerization reaction is carried out under normal pressure.
[0040] S3. After the prepolymerization reaction, the internal temperature of the polymerization kettle 1 is slowly and uniformly increased, and the stirring and mixing treatment inside the polymerization kettle 1 is carried out in conjunction with the stirring shaft 202 to accelerate the polymerization reaction. When the internal temperature of the polymerization kettle 1 rises to 160°C, the raw materials in the kettle complete deep polymerization. During the deep polymerization reaction, the main cylinder 204 can be controlled to operate, and its power output end moves downward to drive the bottom ring 209 and the insertion rod 211 to move downward through the connecting ring 205 and the connecting rod 208. The insertion rod 211 continuously extends into the interior of the material while the inner gear ring 210 continuously moves downward until it engages with the outer periphery of the gear 203. At this time, during the process of the main motor 2 driving the transmission shaft 201 to rotate, the gear 203 can drive the inner gear ring 210, the bottom ring 209, the insertion rod 211 and the rotating ring 207 to rotate, so that the insertion rod 211 can cooperate with the stirring shaft 202 to fully stir and mix the materials, further accelerating the polymerization reaction efficiency.
[0041] S4. The molten material after the deep polymerization reaction is transported to the inside of the feeding barrel 307 under the action of the feeding equipment. The extrusion motor 303 is turned on. When it is running, it drives the rotation of the crankshaft 304 and then drives the piston 306 inside the discharge barrel 302 through the connecting arm 305. The pistons 306 inside the discharge barrels 302 on both sides operate alternately. When the piston 306 retracts to the side of the power box 301, the one-way door A308 opens, and the material inside the feeding pipe is sucked into the inside of the discharge barrel 302. When the piston 306 is squeezed toward one side of the feed box 3, the one-way door A308 is closed and the one-way door B309 is opened, so that the material inside the discharge barrel 302 enters the feed box 3 and is squeezed into the discharge pipe 310. The material discharged from the discharge pipe 310 is discharged through the die head 311 and then quickly pelletized by the pelletizer 312. After cooling, polystyrene particles are formed. Electric heating components are provided inside the feed pipe, the discharge pipe 310 and the feed box 3 to maintain the internal temperature.
[0042] Example 2
[0043] A polystyrene particle preparation device includes a polymerization kettle 1, a main motor 2, a feed box 3, a fixed seat 4 and a pump body 408. The main motor 2 is installed in the middle position of the top of the polymerization kettle 1, and the power output end of the main motor 2 is installed with a stirring shaft 202 located inside the polymerization kettle 1 through a transmission shaft 201. The outer periphery of the stirring shaft 202 is fixed with a gear 203 through a flat key. Main cylinders 204 are installed on both sides of the main motor 2 on the top of the polymerization kettle 1, and a connecting ring 205 located inside the polymerization kettle 1 is installed between the power output ends of the main cylinder 204. The bottom of the connecting ring 205 is movably connected to a bottom ring 209, and an inner gear ring 210 is embedded in the bottom ring 209. The bottom of the bottom ring 209 is welded with an insertion rod 211.
[0044] Among them, a cavity 410 is provided inside the bottom ring 209 and the insertion rod 211, and a partition 412 is welded inside the bottom ring 209 between the bottom ends of the insertion rod 211. The cooling section of the pelletizer 312 is installed with a water supply pipe 406, and a diverter pipe 407 connected to the pump body 408 is provided on one side of the surface of the water supply pipe 406. The inside of the polymerization kettle 1 is fixedly connected to a fixing seat 4 and the top of the fixing seat 4 is provided with an inlet pipe 401 and a drain pipe 402 connected to the pump body 408; the cavity 410, the partition 412 and other structures cooperate to form a one-way flow channel inside the bottom ring 209 and the insertion rod 211. When the pump body 408 is running, part of the cooling water is pumped into the cooling channel by the diverter pipe 407, and the insertion rod 211 is used as a cooling component to quickly cool the material inside the polymerization kettle 1 to avoid the problem of material degradation.
[0045] Among them, the bottom of the fixed seat 4 is movably connected to a socket 404 and a corrugated hose 403 is installed between the fixed seat 4 and the socket 404, the top of the polymerization kettle 1 is installed with a secondary cylinder 405 and the power output end of the secondary cylinder 405 is connected to the side of the socket 404, and the discharge end of the pump body 408 connected to the drain pipe 402 is installed with a recovery pipe 409; the corrugated hose 403 plays a connecting role and does not affect the change of the distance between the fixed seat 4 and the socket 404. The secondary cylinder 405 controls the vertical movement of the socket 404, and the recovery pipe 409 discharges the used cooling water and recycles it after treatment.
[0046] Among them, the bottom end of the insertion rod 211 is welded with a connecting pipe 411 and is connected to the inside of the cavity 410 through the connecting pipe 411, and a through hole 413 is opened inside the partition 412 inside the bottom ring 209; the connecting pipe 411 plays a connecting role between the bottom ends of the insertion rod 211, and cooperates with the through hole 413 structure inside the partition 412, so that the cooling water can flow in one direction.
[0047] Preferably, an inlet pipe 414 connected to the interior of the cavity 410 is provided at the top of the bottom ring 209, and an outlet pipe 415 connected to the interior of the through hole 413 is provided on the side of the top of the bottom ring 209 close to the inlet pipe 414, and a connecting seat 416 corresponding to the position of the socket 404 is installed between the top of the inlet pipe 414 and the outlet pipe 415; the inlet pipe 414 and the outlet pipe 415 are used to circulate the cooling water inside the bottom ring 209, and through the connecting seat 416 structure, it is convenient to dock with the socket 404 structure to realize the connection between the pipelines.
[0048] The method for preparing polystyrene particles comprises the following steps:
[0049] S5. During the pelletizing process, the external cooling water circulation equipment injects cooling water into the pelletizer 312 through the water supply pipe 406 to accelerate the cooling and shaping of the pelletized product. During the deep polymerization process, the temperature monitoring component is set inside the polymerization kettle 1 to monitor the temperature changes inside the polymerization kettle 1 in real time. When the temperature rises above the warning value, the position of the connecting seat 416 inside the polymerization kettle 1 is observed through the perspective window 101. When the connection seat 416 is aligned with the socket 404, the main motor 2 is stopped. The main cylinder 204 lifts the connecting ring 205 to separate the inner gear ring 210 from the gear 203. At the same time, the bottom end of the insert rod 211 is still in Inside the material, the auxiliary cylinder 405 presses down the socket 404 until the socket 404 and the connecting seat 416 are connected, the corrugated hose 403 is stretched, and the pump body 408 runs, and part of the cooling water is drawn in through the diversion pipe 407, and then enters the cavity 410 through the water inlet pipe 401, the fixed seat 4, the corrugated hose 403, the socket 404, the connecting seat 416 and the inlet pipe 414, and flows along the preset flow channel, which can quickly cool the material inside the polymerization kettle 1 to avoid local overheating inside the polymerization kettle 1 causing material degradation and affecting the subsequent particle quality. The cooling water after use is then discharged by the pump body 408 component.
[0050] In summary, the present invention provides a polystyrene particle preparation device and method, which uses styrene monomer as raw material, polyvinyl alcohol as dispersant, dibenzoyl peroxide as initiator, and phenolamine chain transfer agent as chain transfer to improve polymerization efficiency. Epoxidized oil stabilizer is used to stabilize the reaction process and play a certain plasticizing role, thereby ultimately improving the molding efficiency and quality of polystyrene particles. During the deep polymerization reaction, the main cylinder 204 drives the bottom ring 209 and the insert rod 211 through the connecting ring 205 and the connecting rod 208. The gear 203 is engaged with the inner gear ring 210 and the outer periphery of the gear 203. During the rotation of the transmission shaft 201, the gear 203 can drive the rotation of the inner gear ring 210, the bottom ring 209, the plug rod 211 and the rotating ring 207, so that the plug rod 211 can cooperate with the stirring shaft 202 to fully stir and mix the materials, further accelerating the polymerization reaction efficiency. The molten material after the deep polymerization reaction is transported to the inside of the feeding barrel 307 under the action of the feeding equipment. When the extrusion motor 303 is running, it drives the rotation of the crankshaft 304 and then drives the discharge barrels 30 on both sides through the connecting arm 305. The internal piston 306 operates alternately. When the piston 306 retracts toward the power box 301, the one-way door A308 opens to suck in the material. When the piston 306 presses toward the feed box 3, the one-way door B309 opens to extrude the material. In conjunction with the die head 311, the motor-driven piston 306 structure is used as the extrusion equipment, which greatly reduces the space occupied and the cost of the extrusion equipment. The double discharge barrel 302 is used to cooperate with the alternate operation of the piston 306 to achieve continuous and stable extrusion of the material, reducing the granulation cost. When the temperature inside the polymerization reactor 1 rises above the warning value, the main gas The cylinder 204 lifts the connecting ring 205 to separate the inner gear ring 210 from the gear 203. At the same time, the bottom end of the insert rod 211 is still inside the material. The power end of the auxiliary cylinder 405 is pressed down until the socket 404 and the connecting seat 416 are connected. The pump body 408 draws part of the cooling water inside the pelletizer 312 into the cavity 410 through the diversion pipe 407, and circulates along the preset flow channel, which can quickly cool down the material inside the polymerization kettle 1, avoid local overheating inside the polymerization kettle 1 and cause material degradation, realize rapid cooling of the material in the kettle, and ensure material quality.
[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A polystyrene particle preparation device, comprising a polymerization kettle (1), characterized in that: The polymerizer (1) further comprises a main motor (2), a feed box (3), a fixed seat (4) and a pump body (408); the main motor (2) is installed at the middle position of the top of the polymerizer (1); the power output end of the main motor (2) is installed with a stirring shaft (202) located inside the polymerizer (1) via a transmission shaft (201); a gear (203) is fixed to the outer periphery of the stirring shaft (202) via a flat key; main cylinders (204) are installed at both sides of the top of the polymerizer (1) and a connecting ring (205) located inside the polymerizer (1) is installed between the power output ends of the main cylinder (204); a bottom ring (209) is movably connected to the bottom of the connecting ring (205), and an inner gear ring (210) is embedded in the bottom ring (209); and a plug rod (211) is welded to the bottom of the bottom ring (209).
2. A polystyrene particle preparation device according to claim 1, characterized in that: A power box (301) is provided on one side of the feed box (3), and the power box (301) and the feed box (3) are connected via a symmetrically arranged discharge barrel (302). An extrusion motor (303) is installed on the side of the feed box (3), and a crankshaft (304) located inside the power box (301) is installed at the power output end of the extrusion motor (303). A piston (306) inserted into the discharge barrel (302) is movably connected to the surface of the crankshaft (304) via a connecting arm (305). A discharge pipe (310) is provided at the discharge end of the feed box (3), and a die head (311) is detachably connected to the end of the discharge pipe (310). A pelletizer (312) is provided on the side of the die head (311) away from the feed box (3).
3. The polystyrene particle preparation device according to claim 2, characterized in that: A cavity (410) is provided inside the bottom ring (209) and the insertion rod (211), a partition (412) is welded inside the bottom ring (209) between the bottom ends of the insertion rod (211), a water supply pipe (406) is installed in the cooling section of the pelletizer (312), a diversion pipe (407) connected to the pump body (408) is provided on one side of the surface of the water supply pipe (406), a fixing seat (4) is fixedly connected inside the polymerization kettle (1), and a water inlet pipe (401) and a drain pipe (402) connected to the pump body (408) are provided on the top of the fixing seat (4).
4. The polystyrene particle preparation device according to claim 1, characterized in that: The top of the polymerization kettle (1) is equipped with a perspective window (101) for observing the interior of the polymerization kettle (1); a bearing (206) is embedded in the interior of the connecting ring (205) and is movably connected to a rotating ring (207) through the bearing (206); connecting rods (208) are welded on both sides of the bottom of the rotating ring (207) and are connected to the top of the bottom ring (209) through the connecting rods (208); and the inner gear ring (210) matches the gear (203).
5. The polystyrene particle preparation device according to claim 2, characterized in that: A one-way door A (308) is movably connected to the inside of the feeding cylinder (307) near the side of the discharging cylinder (302), and the one-way door A (308) opens in one direction toward the inside of the discharging cylinder (302). A one-way door B (309) is movably connected to the inside of the discharging cylinder (302) near the side of the feeding box (3), and the one-way door B (309) opens in one direction toward the inside of the feeding box (3).
6. The polystyrene particle preparation device according to claim 3, characterized in that: The bottom of the fixing seat (4) is movably connected to a socket (404), and a corrugated rubber hose (403) is installed between the fixing seat (4) and the socket (404). The top of the polymerization kettle (1) is equipped with a secondary cylinder (405), and the power output end of the secondary cylinder (405) is connected to the side of the socket (404). The discharge end of the pump body (408) connected to the drain pipe (402) is equipped with a recovery pipe (409).
7. The polystyrene particle preparation device according to claim 3, characterized in that: The bottom end of the insertion rod (211) is welded with a connecting pipe (411) at intervals and is connected to the interior of the cavity (410) through the connecting pipe (411). A through hole (413) is provided inside the partition (412) inside the bottom ring (209).
8. A polystyrene particle preparation device according to claim 7, characterized in that: An inlet pipe (414) communicating with the interior of the cavity (410) is provided at the top of the bottom ring (209); an outlet pipe (415) communicating with the interior of the through hole (413) is provided at the top of the bottom ring (209) near the inlet pipe (414); and a connecting seat (416) corresponding to the position of the socket (404) is installed between the tops of the inlet pipe (414) and the outlet pipe (415).
9. A method for preparing polystyrene particles according to any one of claims 1 to 8, characterized in that: The method for preparing polystyrene particles comprises the following steps: S1. Raw material preparation and processing: prepare styrene monomer as the main raw material, prepare dispersant, initiator and other additives, use deionized water to deeply soak and clean the styrene monomer, remove impurities attached to the surface of the styrene monomer and other adhesives that may affect the polymerization reaction, ensure the normal progress of the polymerization reaction, and dehydrate the styrene monomer after deep cleaning. After dehydration, set aside; S2, using polyvinyl alcohol as a dispersant and dibenzoyl peroxide as an initiator, mixing the dispersant and initiator with styrene monomer, and adding them into the polymerization kettle (1), while using a phenolamine chain transfer agent as a chain transfer agent, and using an epoxidized oil stabilizer to stabilize the reaction process and play a certain plasticizing role, after the raw materials are added, the main motor (2) is controlled to operate, and the driving shaft (201) drives the stirring shaft (202) to rotate, and steam heating is used to raise the temperature in the kettle to 100-110° C., and a prepolymerization reaction is carried out under normal pressure; S3. After the prepolymerization reaction, the temperature inside the polymerization kettle (1) is raised slowly and uniformly, and the stirring shaft (202) is used to stir and mix the materials inside the polymerization kettle (1) to accelerate the polymerization reaction. When the temperature inside the polymerization kettle (1) rises to 160° C., the raw materials in the kettle complete deep polymerization. During the deep polymerization reaction, the main cylinder (204) can be controlled to operate, and its power output end moves downward through the connecting ring (205) and the connecting rod (208) to drive the bottom ring (209) and the insert rod (211) to move downward. , the insert rod (211) continuously extends into the interior of the material and the inner gear ring (210) continuously moves downward until it meshes with the outer periphery of the gear (203). At this time, the main motor (2) drives the transmission shaft (201) to rotate, and the gear (203) can drive the inner gear ring (210), the bottom ring (209), the insert rod (211) and the rotating ring (207) to rotate, so that the insert rod (211) can cooperate with the stirring shaft (202) to fully stir and mix the materials, thereby further accelerating the polymerization reaction efficiency; S4. The molten material after the deep polymerization reaction is transported to the inside of the feeding barrel (307) under the action of the feeding equipment. The extrusion motor (303) is turned on. When it is running, it drives the rotation of the crankshaft (304) and then drives the piston (306) inside the discharge barrel (302) to move through the connecting arm (305). The pistons (306) inside the discharge barrels (302) on both sides operate alternately. When the piston (306) retracts to the side of the power box (301), the one-way door A (308) opens, and the material inside the feeding pipe is sucked into the inside of the discharge barrel (302). When the piston (306) is pressed toward one side of the feed box (3), the one-way door A (308) is closed and the one-way door B (309) is opened, so that the material inside the discharge barrel (302) enters the feed box (3) and is squeezed into the discharge pipe (310). The material discharged from the discharge pipe (310) is discharged through the die head (311) and then quickly pelletized by the pelletizer (312). After cooling, polystyrene particles are formed. Electric heating components are provided inside the feed pipe, the discharge pipe (310) and the feed box (3) to maintain the internal temperature. S5. During the pelletizing process, the external cooling water circulation device injects cooling water into the pelletizer (312) through the water supply pipe (406) to accelerate the cooling and shaping of the pelletized product. During the deep polymerization process, the temperature monitoring component is set inside the polymerization kettle (1) to monitor the temperature change inside the polymerization kettle (1) in real time. When the temperature rises above the warning value, the position of the internal connection seat (416) of the polymerization kettle (1) is observed through the perspective window (101). When the connection seat (416) is aligned with the socket (404), the operation of the main motor (2) is suspended, and the main cylinder (204) lifts the connection ring (205) so that the inner gear ring (210) is separated from the gear (203). At the same time, the bottom end of the rod (211) is still in the material. The auxiliary cylinder (405) presses down the socket (404) until the socket (404) and the connecting seat (416) are connected, the corrugated hose (403) is stretched, and the pump body (408) is operated, and part of the cooling water is drawn in through the shunt pipe (407), and then enters the cavity (410) through the water inlet pipe (401), the fixed seat (4), the corrugated hose (403), the socket (404), the connecting seat (416) and the inlet pipe (414), and circulates along the preset flow channel, which can quickly cool the material inside the polymerization kettle (1) to avoid the problem of local overheating inside the polymerization kettle (1) causing material degradation and affecting the quality of subsequent particles. The used cooling water is then discharged from the pump body (408) component.