Polyphenylene sulfide preparation system and method

Abstract

The invention relates to the technical field of polyphenylene sulfide preparation, in particular to a polyphenylene sulfide preparation system and method.The polyphenylene sulfide preparation system comprises a filter cartridge, a reaction kettle, a bottom plate, two protruding blocks, a hydraulic cylinder, a water collecting barrel, a drainage pipeline, a plurality of heating rods, a through hole, two vertical grooves and two semicircular grooves, cold air guiding-in mechanisms are arranged in the semicircular grooves, and a lifting mechanism is arranged at one end of the bottom plate; a sealing cover is arranged at the output end of the lifting mechanism, a stirring motor, a water supply mechanism, a feeding pipe and a temperature sensor are arranged on the sealing cover, a stirring block is arranged at the output end of the stirring motor, and a sealing ring and two abutting rods are arranged at the inner top of a sealing plate. Automatic and continuous polyphenylene sulfide preparation process is realized, production efficiency is improved, waste of manpower and material resources can be reduced through continuous production, production cost is reduced, and market competitiveness of products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of polyphenylene sulfide preparation, and in particular to a polyphenylene sulfide preparation system and method. Background Art

[0002] Polyphenylene sulfide is a semi-crystalline thermoplastic polymer composed of alternating benzene rings and sulfur atoms; this special structure gives polyphenylene sulfide a relatively rigid molecular structure, while the presence of sulfide bonds gives it a certain degree of flexibility.

[0003] However, polyphenylene sulfide needs to go through multiple steps during its preparation, and currently the devices involved in the multiple steps are all independently configured, which cannot form a continuous preparation process, thereby reducing the preparation efficiency. Summary of the invention

[0004] The object of the present invention is to provide a system and method for preparing polyphenylene sulfide, so as to solve the technical problem that polyphenylene sulfide in the prior art needs to go through multiple steps during preparation, and the devices involved in the multiple steps are currently all independently set up, which cannot form a continuous preparation process, thereby reducing the preparation efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides a polyphenylene sulfide preparation system, including a filter cartridge, a reactor and a bottom plate, two protrusions are arranged on the outer side of the filter cartridge, a hydraulic cylinder is arranged below the reactor, a water collecting cylinder is arranged at the output end of the hydraulic cylinder, a drainage pipe is connected to the outer side of the water collecting cylinder, and the water collecting cylinder is slidably arranged on the inner side of the reactor, a plurality of heating rods are arranged on the inner side of the reactor, a through hole, two vertical grooves and two semicircular grooves are provided on the inner side of the reactor, and a cold air introduction mechanism is arranged in the semicircular grooves, a lifting mechanism is arranged at one end of the bottom plate, and a sealing cover is arranged at the output end of the lifting mechanism, The sealing cover is provided with a stirring motor, a water supply mechanism, a feeding pipe and a temperature sensor, and the water supply mechanism is arranged around the stirring motor, and a stirring block is arranged at the output end of the stirring motor, and a sealing ring and two supporting rods are arranged at the inner top of the sealing plate, the filter cylinder is slidably connected to the water collecting cylinder and is located in the water collecting cylinder, and the two protrusions are respectively located in the corresponding vertical grooves, the reactor is arranged at the other end of the bottom plate, the sealing cover is slidably connected to the reactor and covers the reactor, and the two supporting rods respectively support the corresponding protrusions, and the stirring block extends into the filter cylinder.

[0006] Wherein, a drainage plate is arranged at the inner bottom of the water collecting cylinder, the drainage plate has an inclined surface, and the lowest end of the inclined surface is located at the drainage pipe.

[0007] Wherein, the through hole is located below the vertical groove and the semicircular groove, and the two vertical grooves are respectively located between the two semicircular grooves.

[0008] Among them, the cold air introduction mechanism includes a plurality of cold air nozzles and a semicircular body, the semicircular body is connected with an air inlet pipe, the plurality of cold air nozzles are respectively connected with the semicircular body and are located on the inner side of the semicircular body, the semicircular body is fixedly connected to the reactor and is located in the corresponding semicircular groove, and the air inlet pipe extends out of the reactor.

[0009] Wherein, the plurality of cold air nozzles are arranged in an inclined shape, and the inclined direction of the plurality of cold air nozzles is arranged toward the direction of the filter cartridge.

[0010] Wherein, the water supply mechanism includes a water collecting ring and a water collecting tank, the lower part of the water collecting ring is connected with a plurality of water inlet nozzles, the upper part of the water collecting ring is provided with a plurality of connecting pipes, one end of the connecting pipe is provided with a water pump, and the water collecting tank is provided with a water inlet pipe, the water collecting ring is fixedly connected to the sealing cover and is located at the inner top of the sealing cover, and the connecting pipe passes through the sealing cover, the water collecting tank is fixedly connected to the sealing cover and is located above the sealing cover, and the water pump extends into the water collecting tank.

[0011] The present invention also provides a method for preparing polyphenylene sulfide, which is applied to the above-mentioned polyphenylene sulfide preparation system and comprises the following steps:

[0012] Firstly, raw materials, additives and solvents are added into the filter cylinder of the reactor through the feed pipe, and the raw materials, additives and solvents are mixed and stirred based on the stirring block;

[0013] Turning on the plurality of heating rods at the same time, so that the plurality of heating rods are kept in two stages for heating, wherein the reaction temperature of the first stage is 210°C to 230°C, the reaction time is 12 hours, and then the reaction temperature of the second stage is 250°C to 270°C, the reaction time is 24 hours;

[0014] When the reaction is completed, the cold air is discharged into the reactor through the cold air introduction mechanism, the temperature in the reactor is slowly reduced to below 100° C., a certain amount of water is heated through the water supply mechanism, and then the solid-liquid mixture is formed by slurrying through the stirring block;

[0015] The hydraulic cylinder is started to move the water collecting cylinder away from the filter cylinder. At this time, the solid-liquid mixture is separated by the filter cylinder. At the same time, the water supply mechanism is used to wash the salt in the solid for multiple times, and then the solid is dried by the multiple heating rods to obtain polyphenylene sulfide.

[0016] Based on the liquid discharged from the drainage pipe, the additives and solvents therein are recovered by diversion and distillation, and then the salts therein are extracted and recovered by sedimentation filtration.

[0017] A polyphenylene sulfide preparation system and method of the present invention comprises a filter cartridge, a reactor and a bottom plate, wherein two protrusions are arranged on the outside of the filter cartridge, a hydraulic cylinder is arranged below the reactor, a water collecting cylinder is arranged at the output end of the hydraulic cylinder, a drainage pipe is connected to the outside of the water collecting cylinder, and the water collecting cylinder is slidably arranged on the inner side of the reactor, a plurality of heating rods are arranged on the inner side of the reactor, a through hole, two vertical grooves and two semicircular grooves are provided on the inner side of the reactor, and a cold air introduction mechanism is arranged in the semicircular grooves, a lifting mechanism is arranged at one end of the bottom plate, a sealing cover is arranged at the output end of the lifting mechanism, a stirring motor, a water supply mechanism, A feeding pipe and a temperature sensor, a stirring block is arranged at the output end of the stirring motor, a sealing ring and two supporting rods are arranged at the inner top of the sealing plate. The design integrates multiple functions such as filtration, reaction, cooling, stirring and water supply in one, realizes the automation and continuity of the preparation process of polyphenylene sulfide, improves production efficiency, and continuous production can reduce the waste of manpower and material resources, reduce production costs, and improve the market competitiveness of products. In this way, the technical problem that polyphenylene sulfide needs to go through multiple processes during preparation, while the devices involved in the multiple processes are currently independently set up and cannot form a continuous preparation process, thereby reducing the preparation efficiency, is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0019] Figure 1 It is a front view of the first embodiment of the present invention.

[0020] Figure 2 The present invention Figure 1 Section view along line AA.

[0021] Figure 3 The present invention Figure 2 A partial enlarged view of point B in the middle.

[0022] Figure 4 It is a schematic structural diagram of a reaction kettle and a bottom plate in the first embodiment of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the filter cartridge and the water collecting cartridge in the first embodiment of the present invention.

[0024] Figure 6is a side view of a second embodiment of the present invention.

[0025] Figure 7 The present invention Figure 6 Sectional view along the CC line.

[0026] Figure 8 The present invention Figure 7 Sectional view along line DD.

[0027] Fig. 9 It is a schematic structural diagram of the cold air introduction mechanism in the second embodiment of the present invention.

[0028] Fig.10 It is a three-dimensional stereogram of the third embodiment of the present invention.

[0029] Fig.11 It is a front view of the third embodiment of the present invention.

[0030] Fig.12 The present invention Fig.11 Cross-sectional view along line EE.

[0031] Fig.13 The present invention Fig.12 A partial enlarged view of point F in the middle.

[0032] Fig.14 The present invention Fig.11 Sectional view along the GG line.

[0033] Fig.15 The present invention is a flow chart of the steps of a method for preparing polyphenylene sulfide.

[0034] 101-filter cartridge, 102-reactor, 103-bottom plate, 104-bump, 105-hydraulic cylinder, 106-water collecting cylinder, 107-drainage pipe, 108-heating rod, 109-through hole, 110-vertical groove, 111-semicircular groove, 112-cold air introduction mechanism, 113-lifting mechanism, 114-sealing cover, 115-stirring motor, 116-water supply mechanism, 117-feeding pipe, 118-temperature sensor, 119-stirring block, 120-sealing ring, 121-holding rod, 122- Drainage plate, 123-inclined surface, 201-cold air nozzle, 202-semicircle, 203-inlet pipe, 204-water collecting ring, 205-water collecting tank, 206-water inlet nozzle, 207-connecting pipe, 208-water pump, 209-water inlet pipe, 301-lifting motor, 302-lifting rod, 303-support cylinder, 304-driving gear, 305-threaded sleeve, 306-driven gear, 307-protective cover, 308-polygonal rod, 309-polygonal groove, 310-limiting ring, 311-limiting groove. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0036] First embodiment:

[0037] See also Figure 1 to Figure 5 ,in Figure 1 is a front view of a first embodiment of the present invention, Figure 2 The present invention Figure 1 The cross-sectional view along the AA line. Figure 3 The present invention Figure 2 A partial enlarged view of point B in the middle. Figure 4 is a schematic structural diagram of a reaction kettle and a bottom plate in a first embodiment of the present invention, Figure 5 It is a schematic structural diagram of the filter cartridge and the water collecting cartridge in the first embodiment of the present invention.

[0038] The present invention provides a polyphenylene sulfide preparation system, comprising a filter cartridge 101, a reactor 102 and a bottom plate 103, wherein two protrusions 104 are arranged on the outside of the filter cartridge 101, a hydraulic cylinder 105 is arranged below the reactor 102, a water collecting cartridge 106 is arranged at the output end of the hydraulic cylinder 105, a drainage pipe 107 is connected to the outside of the water collecting cartridge 106, and the water collecting cartridge 106 is slidably arranged on the inside of the reactor 102, a plurality of heating rods 108 are arranged on the inside of the reactor 102, and the inside of the reactor 102 is provided with a plurality of heating rods 108. The bottom plate 103 has a through hole 109, two vertical grooves 110 and two semicircular grooves 111, and a cold air introduction mechanism 112 is arranged in the semicircular groove 111. A lifting mechanism 113 is arranged at one end of the bottom plate 103, and a sealing cover 114 is arranged at the output end of the lifting mechanism 113. A stirring motor 115, a water supply mechanism 116, a feeding pipe 117 and a temperature sensor 118 are arranged on the sealing cover 114, and the water supply mechanism 116 is arranged around the stirring motor 115. A stirring block 119 is arranged at the output end of the stirring motor 115. The inner top of the sealing plate is provided with a sealing ring 120 and two abutting rods 121, the filter cartridge 101 is slidably connected with the water collecting cartridge 106 and is located in the water collecting cartridge 106, and the two protrusions 104 are respectively located in the corresponding vertical grooves 110, the reactor 102 is provided at the other end of the bottom plate 103, the sealing cover 114 is slidably connected with the reactor 102 and covers the reactor 102, and the two abutting rods 121 abut the corresponding protrusions 104 respectively, and the stirring block 119 extends Into the filter cartridge 101, the present design integrates multiple functions such as filtration, reaction, cooling, stirring, and water supply, thereby realizing the automation and continuity of the polyphenylene sulfide preparation process and improving production efficiency. Continuous production can reduce the waste of manpower and material resources, reduce production costs, and improve the market competitiveness of products. In this way, the technical problem that polyphenylene sulfide needs to go through multiple processes during preparation, while the devices involved in the multiple processes are currently independently set up and cannot form a continuous preparation process, thereby reducing the preparation efficiency, is effectively solved.

[0039] A drainage plate 122 is provided at the inner bottom of the water collecting cylinder 106 . The drainage plate 122 has a slope 123 , and the lowest end of the slope 123 is located at the drainage pipe 107 . The drainage plate 122 can be used to quickly drain the liquid in the water collecting cylinder 106 .

[0040] Secondly, the through hole 109 is located below the vertical groove 110 and the semicircular groove 111 , and the two vertical grooves 110 are respectively located between the two semicircular grooves 111 .

[0041] When using a polyphenylene sulfide preparation system of the present embodiment, raw materials, additives and solvents are added into the filter cartridge 101 of the reactor 102 through the feed pipe 117, and the raw materials, additives and solvents are mixed and stirred based on the stirring motor 115 driving the stirring block 119, and the heating rod 108 performs a heating reaction at the same time. When the heating reaction is completed, the cold air is discharged into the reactor 102 through the cold air introduction mechanism 112 for cooling, and a certain amount of water is heated, and then the stirring block 119 is used for slurrying to form a solid-liquid mixture, and then the hydraulic cylinder 105 is started to move the water collecting cylinder 106 in a direction away from the filter cartridge 101. At this time, the solid-liquid mixture is separated by the filter cartridge 101. It should be noted that the filter cartridge 101 can filter the raw materials, and the liquid is discharged. At the same time, the water supply mechanism 116 is used to perform multiple water washing purification to flush out the salt in the solid. The liquid is discharged through the drainage pipe 107, and the auxiliary agent and solvent therein are recovered by diversion and distillation. Subsequently, the salt therein is extracted and recovered by sedimentation filtration, and then the solid is dried by multiple heating rods 108. Finally, the lifting mechanism 113 is started to lift the sealing cover 114, and then the filter cartridge 101 is taken out to obtain polyphenylene sulfide.

[0042] Second embodiment:

[0043] Based on the first embodiment, please refer to Figure 6 to Figure 9 ,in Figure 6 is a side view of a second embodiment of the present invention, Figure 7 The present invention Figure 6 Cross-sectional view of the CC line, Figure 8 The present invention Figure 7 The cross-sectional view of the DD line, Fig. 9 It is a schematic structural diagram of the cold air introduction mechanism in the second embodiment of the present invention.

[0044] The present invention provides a polyphenylene sulfide preparation system, wherein the cold air introduction mechanism 112 comprises a plurality of cold air nozzles 201 and a semicircular body 202, wherein the semicircular body 202 is connected to an air inlet pipe 203, wherein the plurality of cold air nozzles 201 are respectively connected to the semicircular body 202 and are located on the inner side of the semicircular body 202, wherein the semicircular body 202 is fixedly connected to the reactor 102 and is located in the corresponding semicircular groove 111, and the air inlet pipe 203 extends out of the reactor 102, and after the reaction is completed, the cold air is sprayed into the reactor 102 through the cold air nozzle 201, so as to quickly reduce the temperature of the reaction system, prevent the product from being overheated and decomposed, and also facilitate the solid-liquid separation.

[0045] Among them, the multiple cold air nozzles 201 are arranged in an inclined shape, and the inclined direction of the multiple cold air nozzles 201 is set in the direction of the filter tube 101. The inclined cold air nozzles 201 can more effectively spray cold air toward the filter tube 101, thereby improving the cooling efficiency.

[0046] Secondly, the water supply mechanism 116 includes a water collecting ring 204 and a water collecting box 205. The water collecting ring 204 is connected to a plurality of water inlet nozzles 206 at the bottom, and a plurality of connecting pipes 207 are arranged above the water collecting ring 204. A water pump 208 is arranged at one end of the connecting pipe 207. A water inlet pipe 209 is arranged on the water collecting box 205. The water collecting ring 204 is fixedly connected to the sealing cover 114 and is located at the inner top of the sealing cover 114, and the connecting pipe 207 passes through the sealing cover 114. The water collecting box 205 is fixedly connected to the sealing cover 114 and is located above the sealing cover 114, and the water pump 208 extends into the water collecting box 205. Water is evenly sprayed on the reactants through the water collecting ring 204 and the water inlet nozzles 206, which is beneficial to the reaction and the washing of the products.

[0047] When using a polyphenylene sulfide preparation system of the present embodiment, the cold air is sprayed into the reactor 102 through the cold air nozzle 201, which can quickly reduce the temperature of the reaction system, prevent the product from overheating and decomposition, and also help the solid-liquid separation; the inclined cold air nozzle 201 can more effectively spray the cold air to the filter cartridge 101, thereby improving the cooling efficiency; the water collecting ring 204 and the water inlet nozzle 206 spray water evenly on the reactants, which is beneficial to the reaction and the washing of the product.

[0048] Third embodiment:

[0049] Based on the second embodiment, please refer to Fig.10 ,in Fig.10 is a three-dimensional stereogram of a third embodiment of the present invention, Fig.11 is a front view of a third embodiment of the present invention, Fig.12 The present invention Fig.11 The cross-sectional view of the EE line, Fig.13 The present invention Fig.12 A partial enlarged view of the F point in the middle. Fig.14 The present invention Fig.11 Sectional view along the GG line.

[0050] The present invention provides a polyphenylene sulfide preparation system, wherein the lifting mechanism 113 comprises a lifting motor 301, a lifting rod 302 and a support tube 303, wherein the output end of the lifting motor 301 is provided with a driving gear 304, the outer side of the lifting rod 302 has an external thread, a threaded sleeve 305 is rotatably provided above the support tube 303, and a driven gear 306 is provided on the threaded sleeve 305, the lifting motor 301 is fixedly connected to the support tube 303 and is located on the outer side of the support tube 303, the lifting rod 302 is slidably connected to the support tube 303 and is located inside the support tube 303, and the threaded sleeve 305 is threadedly connected to the lifting rod 302 and is sleeved on the external thread. The driving gear 304 is meshed with the driven gear 306 and is located on the outside of the driven gear 306. The support tube 303 is fixedly connected to the bottom plate 103 and is located at one end of the bottom plate 103. The sealing cover 114 is fixedly connected to the lifting rod 302 and is located at one end of the lifting rod 302. The driving gear 304 is driven by the lifting motor 301, and the driving gear 304 drives the driven gear 306. The lifting rod 302 slides in the support tube 303 and is lifted and lowered by the threaded connection between the threaded sleeve 305 and the external thread, thereby achieving precise control of the lifting rod 302 to ensure the stability and accuracy of the lifting movement.

[0051] Among them, the lifting mechanism 113 also includes a protective cover 307 and a polygonal rod 308. A polygonal groove 309 is provided in the lifting rod 302. The protective cover 307 is fixedly connected to the support tube 303 and is sleeved on the outside of the support tube 303. The driving gear 304 and the driven gear 306 are both located in the protective cover 307. The polygonal rod 308 is arranged in the support tube 303 and is also located in the polygonal groove 309. The driving gear 304 and the driven gear 306 are wrapped by the protective cover 307 to prevent splashes or dangers that may be generated during the operation of the gears, thereby improving the safety of the entire lifting mechanism 113. At the same time, the polygonal rod 308 and the polygonal groove 309 can easily prevent the lifting rod 302 from rotating with the threaded sleeve 305, thereby achieving the lifting effect.

[0052] Secondly, a limiting ring 310 is provided at one end of the threaded sleeve 305, and a limiting groove 311 is provided on the outer side of the support tube 303, and the limiting ring 310 is sleeved on the limiting groove 311. By sleeved on the limiting ring 310 on the limiting groove 311, the threaded sleeve 305 is effectively prevented from falling off from the support tube 303 during operation, thereby ensuring the stability and reliability of the lifting mechanism 113.

[0053] When using a polyphenylene sulfide preparation system according to this embodiment, the lifting motor 301 drives the driving gear 304, and the driving gear 304 drives the driven gear 306. The lifting rod 302 slides within the support cylinder 303 and is lifted through the threaded connection between the threaded sleeve 305 and the external thread, thereby enabling precise control of the lifting rod 302 and ensuring the smoothness and accuracy of the lifting movement. The protective cover 307 encloses the driving gear 304 and the driven gear 306, preventing splashes or hazards that may occur during gear operation and improving the safety of the entire lifting mechanism 113. At the same time, the polygonal rod 308 and the polygonal groove 309 facilitate preventing the lifting rod 302 from rotating along with the threaded sleeve 305, thereby achieving the lifting effect. The limiting ring 310 is sleeved at the limiting groove 311, effectively preventing the threaded sleeve 305 from falling off the support cylinder 303 during operation and ensuring the stability and reliability of the lifting mechanism 113.

[0054] Based on the third embodiment, please refer to Fig.15 , where Fig.15 is a flowchart of the steps of a method for preparing polyphenylene sulfide according to the present invention.

[0055] The present invention also provides a method for preparing polyphenylene sulfide, which is applied to the polyphenylene sulfide preparation system described above and includes the following steps:

[0056] S1: First, add raw materials, additives, and solvents into the filter cylinder 101 of the reaction kettle 102 through the feed pipe 117, and mix and stir the raw materials, additives, and solvents based on the stirring block 119;

[0057] S2: At the same time, turn on multiple heating rods 108, and keep the multiple heating rods 108 heating in two stages. The reaction temperature in the first stage is 210°C - 230°C, and the reaction time is 12 hours. Subsequently, the reaction temperature in the second stage is 250°C - 270°C, and the reaction time is 24 hours;

[0058] S3: When the reaction is completed, discharge cold air into the reaction kettle 102 through the cold air introduction mechanism 112, slowly lower the temperature in the reaction kettle 102 below 100°C, heat a certain amount of water through the water supply mechanism 116, and then form a solid-liquid mixture by adjusting the slurry through the stirring block 119;

[0059] S4: Start the hydraulic cylinder 105 to move the water collecting cylinder 106 away from the filter cylinder 101. At this time, the solid-liquid mixture is separated by the filter cylinder 101. At the same time, the water supply mechanism 116 is used to wash the solid for multiple times to wash away the salt in the solid. The solid is then dried by the multiple heating rods 108 to obtain polyphenylene sulfide.

[0060] Based on the liquid discharged from the drainage pipe 107, the auxiliary agent and the solvent therein are recovered by means of diversion and rectification, and then the salt therein is extracted and recovered by means of sedimentation filtration.

[0061] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A polyphenylene sulfide preparation system, characterized in that: The invention comprises a filter cartridge, a reactor and a bottom plate, wherein two protrusions are arranged on the outer side of the filter cartridge, a hydraulic cylinder is arranged below the reactor, a water collecting cartridge is arranged on the output end of the hydraulic cylinder, a drainage pipe is connected to the outer side of the water collecting cartridge, and the water collecting cartridge is slidably arranged on the inner side of the reactor, a plurality of heating rods are arranged on the inner side of the reactor, a through hole, two vertical grooves and two semicircular grooves are provided on the inner side of the reactor, and a cold air introduction mechanism is arranged in the semicircular grooves, a lifting mechanism is arranged on one end of the bottom plate, a sealing cover is arranged on the output end of the lifting mechanism, and a stirring electric The bottom plate comprises a bottom plate, ...

2. The polyphenylene sulfide preparation system according to claim 1, characterized in that: The inner bottom of the water collecting cylinder is provided with a guide plate, the guide plate has an inclined surface, and the lowest end of the inclined surface is located at the drainage pipe.

3. The polyphenylene sulfide preparation system according to claim 2, characterized in that: The through hole is located below the vertical groove and the semicircular groove, and the two vertical grooves are respectively located between the two semicircular grooves.

4. The polyphenylene sulfide preparation system according to claim 3, characterized in that: The cold air introduction mechanism includes a plurality of cold air nozzles and a semicircular body, the semicircular body is connected to an air inlet pipe, the plurality of cold air nozzles are respectively connected to the semicircular body and are located on the inner side of the semicircular body, the semicircular body is fixedly connected to the reactor and is located in the corresponding semicircular groove, and the air inlet pipe extends out of the reactor.

5. The polyphenylene sulfide preparation system according to claim 4, characterized in that: The plurality of cold air nozzles are arranged in an inclined shape, and the inclined directions of the plurality of cold air nozzles are arranged toward the direction of the filter cartridge.

6. The polyphenylene sulfide preparation system according to claim 5, characterized in that: The water supply mechanism includes a water collecting ring and a water collecting box. The water collecting ring is connected to a plurality of water inlet nozzles below, and a plurality of connecting pipes are arranged above the water collecting ring. A water pump is arranged at one end of the connecting pipe. A water inlet pipe is arranged on the water collecting box. The water collecting ring is fixedly connected to the sealing cover and is located at the inner top of the sealing cover, and the connecting pipe passes through the sealing cover. The water collecting box is fixedly connected to the sealing cover and is located above the sealing cover, and the water pump extends into the water collecting box.

7. A method for preparing polyphenylene sulfide, applied to the polyphenylene sulfide preparation system as claimed in claim 6, characterized in that: The steps include: Firstly, raw materials, additives and solvents are added into the filter cylinder of the reactor through the feed pipe, and the raw materials, additives and solvents are mixed and stirred based on the stirring block; Turning on the plurality of heating rods at the same time, so that the plurality of heating rods are kept in two stages for heating, wherein the reaction temperature of the first stage is 210°C to 230°C, the reaction time is 12 hours, and then the reaction temperature of the second stage is 250°C to 270°C, the reaction time is 24 hours; When the reaction is completed, the cold air is discharged into the reactor through the cold air introduction mechanism, the temperature in the reactor is slowly reduced to below 100° C., a certain amount of water is heated through the water supply mechanism, and then the solid-liquid mixture is formed by slurrying through the stirring block; The hydraulic cylinder is started to move the water collecting cylinder away from the filter cylinder. At this time, the solid-liquid mixture is separated by the filter cylinder. At the same time, the water supply mechanism is used to wash the salt in the solid for multiple times, and then the solid is dried by the multiple heating rods to obtain polyphenylene sulfide. Based on the liquid discharged from the drainage pipe, the additives and solvents therein are recovered by diversion and distillation, and then the salts therein are extracted and recovered by sedimentation filtration.

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