A waste gas purification system and process based on polyphenylene sulfide.

Abstract

This invention relates to the field of dispersed particle separation technology, and discloses a waste gas purification system and process based on polyphenylene sulfide (PPS). The waste gas purification system includes an encapsulation assembly, which includes a support frame, a storage cylinder fixed to the top outer wall of the support frame, a drainage pipe disposed on the bottom inner wall of the storage cylinder, a guide ring disposed on the top outer wall of the drainage pipe, and a liquid outlet pipe disposed on the inner wall of the storage cylinder; a diversion assembly disposed on the bottom outer wall of the storage cylinder; a moisture absorption assembly disposed on the top outer wall of the storage cylinder; an exhaust connection plate disposed on the top outer wall of the moisture absorption assembly; and a processing assembly disposed on the inner side wall of the exhaust connection plate. By designing the shape of the separation hopper and guide block, large dust particles are separated using the principle of inertia, and medium-sized dust particles are separated by changes in airflow velocity, thus improving the efficiency of graded treatment of PPS dust of different particle sizes.

Description

Technical Field

[0001] This invention relates to the field of dispersed particle separation technology, and in particular to a waste gas purification system and process based on polyphenylene sulfide. Background Technology

[0002] In the preparation of polyphenylene sulfide (PPS), in order to protect the environment, it is necessary to remove dispersed particles such as PPS dust, salt particles, and aerosols contained in the exhaust gas. Among them, these particles have limitations due to their large particle size range and complex composition. Traditional cyclone separators rely solely on centrifugal force to separate large PPS dust clumps. The design of the troughs lacks specificity, and unreasonable opening angles can easily cause large particles to swirl with the airflow. Insufficient number of troughs makes it difficult for some large dust clumps to escape the airflow trajectory, ultimately resulting in incomplete separation. A large number of large particles that are not captured enter subsequent stages, increasing the processing burden. At the same time, these devices cannot classify particles according to their mass differences. Medium and small particles are often mixed in the airflow and enter the next stage of treatment together. Multiple devices need to be connected in series for secondary or even multiple separations, which increases the overall system volume and pipeline complexity, and also increases energy consumption due to multi-stage power drive.

[0003] In wet scrubbing, the fixed spray structure has significant drawbacks. The fixed position of the spray head limits the spray range to a localized area, making it difficult to achieve full contact with the airflow. In areas with uneven airflow velocity, spray blind spots easily appear, allowing a large number of small and medium-sized particles to escape capture due to insufficient contact with the solution. In addition, under the fixed spray mode, the concentration of the weakly alkaline solution varies significantly. Some areas form high-concentration zones due to solution accumulation, while other areas have insufficient concentration. This affects the neutralization efficiency of soluble particles and can also cause precipitation due to local overreaction, clogging the spray channels and increasing the burden on the system. If the large amount of water vapor carried by the exhaust gas after wet treatment is not completely removed, it will chemically react with the materials of subsequent filter components, easily forming a continuous corrosive environment. This leads to enlarged filter pore size, reduced structural strength, shortened equipment replacement cycle, and even direct emission of unpurified particles due to filtration failure, thus affecting the stability of the treatment effect. Summary of the Invention

[0004] Given the problem that existing technology cannot completely separate dispersed particles in PPS exhaust gas, a waste gas purification system based on polyphenylene sulfide is proposed.

[0005] Its purpose is to achieve the separation of large, medium and small particles through a hierarchical separation structure.

[0006] The technical solution of this invention is a waste gas purification and treatment system based on polyphenylene sulfide, comprising a packaging assembly. The packaging assembly includes a support frame, a storage cylinder fixedly disposed on the top outer wall of the support frame, a drainage pipe disposed on the bottom inner wall of the storage cylinder, a guide ring disposed on the top outer wall of the drainage pipe, a liquid outlet pipe disposed on the inner wall of the storage cylinder, a balance groove opened in the liquid outlet pipe, a rubber rope disposed on the outer wall of the liquid outlet pipe, and a blocking cap disposed at one end of the rubber rope; it also includes a diversion assembly disposed on the bottom outer wall of the storage cylinder, a moisture absorption assembly disposed on the top outer wall of the storage cylinder, an exhaust connection plate disposed on the top outer wall of the moisture absorption assembly, and an exhaust connection plate disposed inside the exhaust connection plate. The system includes a processing component on the side wall, a separating component on the inner wall of the processing component, a spraying component on the inner wall of the processing component, a DC motor on the top outer wall of the processing component, and a guide rod at the output end of the DC motor. The diversion component includes a connecting ring fixedly disposed on the bottom outer wall of the storage cylinder, a separation hopper disposed on the inner side wall of the connecting ring, a cleaning nozzle disposed on the bottom outer wall of the separation hopper, a guide block disposed on the outer wall of the separation hopper, and an air inlet pipe disposed on the outer wall of the guide block. The dehumidification component is used to dehumidify the gas after wet particle capture to protect the subsequent processing components. The processing component is used for airflow guidance to assist in wet capture of fine particles.

[0007] Furthermore, the moisture-absorbing component includes a wrapping ring fixedly disposed on the outer wall of the top of the storage cylinder, a fixing frame disposed on the outer wall of the wrapping ring, an air inlet slot opened on the outer wall of the fixing frame, and moisture-absorbing cotton disposed on the outer wall of the fixing frame. The outer wall of the top of the wrapping ring is fixedly connected to the outer wall of the bottom of the exhaust connection plate.

[0008] Furthermore, the processing assembly includes an outer cylinder fixedly disposed on the inner sidewall of the exhaust connection plate, a guide groove formed on the outer wall of the outer cylinder, a guide ring disposed on the outer sidewall of the outer cylinder, an inner cylinder disposed on the inner outer wall of the outer cylinder, and a flow guide shroud disposed on the inner sidewall of the inner cylinder. The inner wall of the flow guide shroud and the interior of the inner cylinder are rotatably connected to the outer wall of the flow guide rod. The outer wall of the top of the inner cylinder is fixedly connected to the outer wall of the bottom of the DC motor.

[0009] Furthermore, the separating assembly includes a fixing ring disposed on the outer side wall of the inner cylinder, a damping rod disposed on the bottom outer wall of the fixing ring, a tension spring disposed on the outside of the damping rod, a sliding ring disposed on the bottom outer wall of the damping rod, a connecting rod disposed on the bottom outer wall of the sliding ring, and a supporting ring disposed on the bottom outer wall of the connecting rod. The outer side wall of the fixing ring is fixedly connected to the inner side wall of the outer cylinder, the outer wall of the sliding ring is slidably connected to both the inner side wall of the outer cylinder and the outer side wall of the inner cylinder, and the two ends of the tension spring are fixedly connected to the outer wall of the fixing ring and the outer wall of the sliding ring, respectively.

[0010] Furthermore, the fixing ring, sliding ring, and supporting ring are all annular in shape and are in sealed contact with the outer and inner cylinders.

[0011] Furthermore, the spraying assembly includes a servo motor fixedly mounted on the outer wall of the outer cylinder via a bracket, a drive gear mounted on the output end of the servo motor, an end face gear mounted on the outer wall of the drive gear, a water injection ring fixedly mounted on the outer wall of the outer cylinder via a bracket, a tee pipe mounted on the outer wall of the water injection ring, a fixing pipe mounted on the inner wall of the water injection ring, a corrugated pipe mounted on the end of the fixing pipe away from the water injection ring, a spray pipe mounted on the other end of the corrugated pipe, a rotating blade mounted on the inner wall of the spray pipe, a positioning ring mounted on the outer wall of the spray pipe, a rotating ring mounted on the top outer wall of the positioning ring, and a limiting ring mounted on the outer wall of the rotating ring.

[0012] Furthermore, the outer wall of the top of the limiting ring is fixedly connected to the outer wall of the bottom of the end face gear, and the limiting ring is rotatably connected to the outer wall of the outer cylinder.

[0013] Another objective of this invention is to provide a waste gas purification process based on polyphenylene sulfide, which aims to simplify the system structure, reduce energy consumption, and improve purification efficiency.

[0014] To achieve the above objectives, the present invention provides the following technical solution: a waste gas purification process based on polyphenylene sulfide, comprising the following steps:

[0015] S1. Pre-cooling of exhaust gas: Dust-laden exhaust gas generated during the preparation of polyphenylene sulfide is introduced into a cooling device to cool down to 80 to 100 degrees Celsius to avoid the impact of high temperature on subsequent equipment and solution stability.

[0016] S2. The cooled exhaust gas is introduced into the diversion component through the air inlet pipe. The exhaust gas rotates in the separation hopper under the action of the guide block. Large clumps of PPS dust are thrown out from the groove of the separation hopper and the connecting ring due to inertia. After being blocked by the support frame, they fall into the bottom ash hopper for collection. Medium dust settles down with the rotating airflow to the impurity removal nozzle for separation. The remaining airflow containing small dust rotates and rises along the central axis of the separation hopper and enters the diversion pipe.

[0017] S3. Wet particle capture: Start the DC motor to drive the guide rod to rotate, enhance the upward rotation of the airflow, and start the spraying assembly; The servo motor drives the spray pipe to move through the gear transmission. The weakly alkaline solution enters the spray pipe through the three-way pipe, water injection ring, and corrugated pipe. It is sprayed evenly by the action of the rotating blades. The solution flows down along the groove of the guide shroud and comes into contact with the rotating airflow between the guide pipe and the inner cylinder. Small and medium-sized dust particles are captured by the liquid flow tension, and secondary cooling is completed.

[0018] S4. The gas containing water vapor and liquid droplets is guided by the guide ring and rotates and rises between the storage cylinder and the outer cylinder. The liquid droplets gather due to centrifugal force, causing water vapor to enter the moisture absorption component with the airflow. It enters the moisture absorption cotton between the wrapping ring and the fixed frame through the air inlet of the fixed frame. The airflow is discharged after the moisture is removed by the moisture absorption cotton.

[0019] S5. The gas, after being filtered and dehydrated by the filter screen, is discharged through the exhaust connection plate and enters the subsequent filter screen to further intercept residual small particles and any soluble salt spray, and finally is discharged from the exhaust pipe in compliance with standards.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By designing the shape of the separation hopper and guide block, the separation of large dust particles is achieved using the principle of inertia. The separation effect is enhanced by the opposite side slot. At the same time, medium-sized dust particles are separated by changes in airflow velocity. This improves the efficiency of graded treatment of PPS dust of different particle sizes, reduces the load on subsequent treatment, facilitates centralized treatment, and plays a role in protecting the environment.

[0022] 2. By using a DC motor to drive the guide rod to enhance airflow rotation, and combining it with a movable spray assembly to expand the spraying range, the weakly alkaline solution can be in full contact with the airflow. The water tension is used to capture small and medium-sized particles, while secondary cooling is achieved, thus improving the processing capacity for small and medium-sized particles.

[0023] 3. The airflow is guided to rotate and rise through the guide ring and guide groove, increasing the contact area of ​​the liquid droplets. Then, through the adsorption of the moisture-absorbing cotton in the moisture-absorbing component, the moisture in the airflow is effectively removed, preventing the subsequent filter screen from aging rapidly due to corrosion, extending the service life of the filter component, and ensuring the stable operation of the system.

[0024] 4. Utilizing the principle of the support ring in the partition component being pressed down by the weight of the liquid, the related components are linked to achieve automatic liquid drainage, which prevents the liquid in the storage cylinder from overflowing. During the drainage process, the internal air pressure balance is maintained to prevent the liquid from flowing back into the space below that is difficult to clean, thus protecting the storage cylinder. At the same time, the risk of blockage in the liquid outlet pipe is reduced due to the pre-removal of large particles, ensuring stable liquid discharge and maintaining the continuous and stable operation of the system. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall internal structure of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention;

[0028] Figure 4 This is a partial structural diagram of the packaging component of the present invention.

[0029] Figure 5 This is a partial structural diagram of the moisture-absorbing component of the present invention.

[0030] Figure 6 This is a cross-sectional view of the packaging assembly of the present invention;

[0031] Figure 7 This is an enlarged schematic diagram of the structure at point A in this invention;

[0032] Figure 8 This is a cross-sectional view of the shunt assembly of the present invention;

[0033] Figure 9 This is a partial structural diagram of the processing component of the present invention;

[0034] Figure 10 This is a cross-sectional view of the moisture-absorbing component of the present invention;

[0035] Figure 11 This is a cross-sectional structural schematic diagram of the separator component of the present invention;

[0036] Figure 12 This is a cross-sectional view of the spraying assembly of the present invention;

[0037] Figure 13 This is an enlarged schematic diagram of the structure at point B in this invention;

[0038] Figure 14 This is a cross-sectional view of the limiting ring of the present invention.

[0039] In the picture:

[0040] 1. Wrapping assembly; 2. Diversion assembly; 3. Processing assembly; 4. Moisture absorption assembly; 5. Separation assembly; 6. Spraying assembly; 7. Guide rod; 8. DC motor; 9. Exhaust connection plate; 11. Support frame; 12. Storage cylinder; 13. Drain pipe; 14. Guide ring; 15. Liquid outlet pipe; 16. Blocking cover; 17. Rubber rope; 18. Balance slot; 21. Connecting ring; 22. Separation hopper; 23. Guide block; 24. Air inlet pipe; 25. Impurity removal nozzle; 31. Outer cylinder; 32. Guide groove; 33. Guide ring; 34. Inner cylinder; 35. Draft shield; 41. Wrapping ring; 42. Fixing frame; 43. Air inlet slot; 44. Moisture-absorbing cotton; 51. Fixing ring; 52. Damping rod; 53. Tension spring; 54. Sliding ring; 55. Connecting rod; 56. Supporting ring; 61. T-pipe; 62. Water injection ring; 63. Fixing pipe; 64. Corrugated pipe; 65. Positioning ring; 66. Rotating ring; 67. Spray pipe; 68. Rotating blade; 69. Limiting ring; 610. Servo motor; 611. Drive gear; 612. End face gear. Detailed Implementation

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Example 1, referring to Figure 1 - Figure 8 This invention provides a waste gas purification system based on polyphenylene sulfide, comprising a packaging assembly 1. The packaging assembly 1 includes a support frame 11, a storage cylinder 12 fixedly connected to the top outer wall of the support frame 11, a drainage pipe 13 fixedly connected to the bottom inner wall of the storage cylinder 12, a guide ring 14 fixedly connected to the top outer wall of the drainage pipe 13, a liquid outlet pipe 15 fixedly connected to the inner wall of the storage cylinder 12, a balance slot 18 opened in the liquid outlet pipe 15, a rubber rope 17 fixedly connected to the outer wall of the liquid outlet pipe 15, and a blocking cap 16 fixedly connected to one end of the rubber rope 17. It also includes a diversion assembly 2 fixedly connected to the bottom outer wall of the storage cylinder 12, a moisture absorption assembly 4 fixedly connected to the top outer wall of the storage cylinder 12, an exhaust connection plate 9 fixedly connected to the top outer wall of the moisture absorption assembly 4, and a fixed... The treatment assembly 3 is connected to the inner side wall of the exhaust connection plate 9; the separation assembly 5 is fixedly connected to the inner wall of the treatment assembly 3; the spraying assembly 6 is fixedly connected to the inner wall of the treatment assembly 3; the DC motor 8 is fixedly connected to the top outer wall of the treatment assembly 3; and the guide rod 7 is fixedly connected to the output end of the DC motor 8. The diversion assembly 2 includes a connecting ring 21 fixedly connected to the bottom outer wall of the storage cylinder 12; a separation hopper 22 fixedly connected to the inner side wall of the connecting ring 21; a cleaning nozzle 25 fixedly connected to the bottom outer wall of the separation hopper 22; a guide block 23 fixedly connected to the outer wall of the separation hopper 22; and an air inlet pipe 24 fixedly connected to the outer wall of the guide block 23. The moisture absorption assembly 4 is used to dehumidify the gas after wet particle capture to protect the subsequent processing components. The treatment assembly 3 is used for airflow guidance to assist in wet capture of fine particles.

[0043] Specifically, during the treatment process, the cooled exhaust gas is blown into the diversion assembly 2 from the inlet pipe 24. After passing through the inlet pipe 24 and being blown into the separation hopper 22, it rotates around the inside due to the shape of the guide block 23 and the separation hopper 22. Because some clumps of PPS dust are propelled by the airflow during the blowing process, according to the law of inertia, the greater the mass of an object, the greater its inertia. Therefore, large clumps of PPS dust, upon entering the separation hopper 22, will not have enough time to follow the airflow due to their own inertia and will be blown out of the slots on the connecting ring 21 and the separation hopper 22. They will then be blocked inside the support frame 11 and finally collected and processed by the ash hopper-shaped part at the bottom. To avoid insufficient separation of large dust particles by a single slot, the separation hopper 2... The slots on the opposite side of 2 also serve to separate large dust particles. Inside the separation hopper 22, the rotating airflow is accompanied by the rotation of medium and small dust particles. During the rotation, due to the guidance of the separation hopper 22 and the gravity of the particles, the airflow gradually moves downward. During this process, the dust is concentrated, and the medium dust is left at the dust removal nozzle 25 due to the change in airflow velocity. Then, due to gravity, the medium dust falls into the ash hopper, while the airflow, due to the setting of the bottom separation hopper 22, concentrates the rotating airflow at the central axis of the separation hopper 22 and rotates upward, eventually carrying the small dust particles upward and entering the guide pipe 13. In this process, the separation of large dust particles and the partial removal of medium dust particles are completed, which facilitates subsequent centralized processing.

[0044] The arrangement of the guide pipe 13 protects the rising airflow from the influence of incoming gas. At the top of the guide pipe 13, a guide rod 7 driven by a DC motor 8 is installed. The rotating guide rod 7 enhances the rotation of the airflow at the top, accelerating the airflow upward. Guided by the guide ring 14, the airflow contacts the guide shroud 35. The guide shroud 35 guides the airflow, distributing it between the guide pipe 13 and the inner cylinder 34. At this time, the top spraying component 6 sprays a weakly alkaline solution, which flows down from the slot of the guide shroud 35, treating the airflow and providing secondary cooling. The airflow impacts the solution, sending small and medium-sized particles into the water flow, where the surface tension of the water captures the particles. After this process, the airflow is further fed into the solution accumulated at the bottom by the inner cylinder 34, which extends below the liquid surface. After thorough liquid washing, the airflow escapes into the moisture absorption component 4 due to the increased gas density, thus completing the removal of small and medium-sized particles.

[0045] During the exhaust gas purification process, the initial dust concentration was 920 mg / m³ (of which PPS dust accounted for 85% and salt spray and aerosols accounted for 15%). The dust particle size distribution was as follows: large dust (>10μm) 25%, medium dust (5-10μm) 20%, small dust (1-5μm) 35%, and tiny dust (<1μm) 20%.

[0046] Experimental group 1 and control group 1 were set up to measure and compare the dust in the exhaust gas. Dust sampling points were set at the inlet of the diversion component 2, the outlet of the impurity removal nozzle 25, and the outlet of the diversion pipe 13. The dust concentration and particle size distribution at each point were measured using a Mastersizer 3000 laser particle size analyzer. The separation efficiency of dust with different particle sizes was calculated, and the data in the table below were obtained. The data for experimental group 1 were obtained as follows:

[0047] Dust particle size range Inlet concentration of the shunt assembly (mg / m³) Concentration of impurities captured at the nozzle outlet (mg / m³) Residual concentration at the drainage tube outlet (mg / m³) Single-stage separation efficiency Large dust particles (>10μm) 230(25%) 218.5 4.6 98.0% Medium-sized dust (5-10μm) 184(20%) 165.6 12.9 93.0% Small dust particles (1-5μm) 322(35%) 16.1 289.8 10.0%

[0048] A control group was also set up, which used a traditional cyclone separator. Dust sampling points were set at the inlet, bottom outlet, and top outlet, and a laser particle size analyzer was used to measure the dust concentration and particle size distribution.

[0049] Dust particle size range Cyclone separator inlet concentration (mg / m³) Cyclone separator bottom outlet capture concentration (mg / m³) Residual concentration at the top outlet of the cyclone separator (mg / m³) Single-stage separation efficiency Large dust particles (>10μm) 230(25%) 197.8 17.84 92% Medium-sized dust (5-10μm) 184(20%) 152.15 24 86% Small dust particles (1-5μm) 322(35%) 48.3 273.7 15.0%

[0050] Experimental data from experimental group 1 and control group 1 show that traditional equipment, lacking a slot design, allows large dust clumps to easily swirl along the edge of the hopper, making effective separation and removal difficult. This results in large dust clumps (17.84 mg / m³) accumulating inside during airflow and ultimately entering subsequent stages through the top outlet. In contrast, this experiment, through the use of guide blocks and a dual-slot design on the opposite side, increases the separation efficiency of medium and large dust particles, allowing medium and large dust particles to be rotated and discharged during dust rotation, thereby reducing the amount of dust requiring subsequent processing. In the experimental group, although there was a lot of small dust residue, there was little residue of large and medium dust. In contrast, the traditional equipment had a higher proportion of large and medium dust residue (41.84 mg / m³ in the control group vs. 17.5 mg / m³ in the experimental group), and a lot of large particles were retained (41.84 mg / m³ came from 17.84 + 24 mg / m³, while 17.5 mg / m³ came from 4.6 + 12.9 mg / m³). The experimental device could avoid this problem. Therefore, it can be seen that the exhaust gas purification system has high dust separation efficiency, resulting in higher dust removal efficiency of the exhaust gas in this process.

[0051] Reference Figure 1 - Figure 10The moisture-absorbing component 4 includes a wrapping ring 41 fixedly connected to the top outer wall of the storage cylinder 12, a fixing frame 42 fixedly connected to the outer wall of the wrapping ring 41, an air inlet slot 43 opened on the outer wall of the fixing frame 42, and moisture-absorbing cotton 44 snapped onto the outer wall of the fixing frame 42. The top outer wall of the wrapping ring 41 is fixedly connected to the bottom outer wall of the exhaust connecting plate 9. The processing component 3 includes an outer cylinder 31 fixedly connected to the inner side wall of the exhaust connecting plate 9, a guide groove 32 opened on the outer wall of the outer cylinder 31, a guide ring 33 fixedly connected to the outer side wall of the outer cylinder 31, an inner cylinder 34 fixedly connected to the inner outer wall of the outer cylinder 31, and a flow guide shroud 35 fixedly connected to the inner side wall of the inner cylinder 34. The inner wall of the flow guide shroud 35 and the interior of the inner cylinder 34 are rotatably connected to the outer wall of the flow guide rod 7. The top outer wall of the inner cylinder 34 is fixedly connected to the bottom outer wall of the DC motor 8.

[0052] Specifically, the cooled and treated gas carries water droplets. To prevent corrosion of the filter screen during subsequent processing and avoid rapid aging of the filter components, a treatment component 3 is installed along the airflow path. The gas drifting out of the liquid will be guided along a single path to contact the guide ring 33. Under the constraint of the guide ring 33, the storage cylinder 12, and the outer cylinder 31, it will rotate and rise. During this process, by increasing the contact area with the airflow, the contact area with small liquid droplets is increased, reducing the presence of liquid droplets. When the airflow leaves the guide ring 33... Guided by the guide groove 32, the airflow continues to rotate within the moisture-absorbing component 4. The rotating gas carrying water vapor is forced to flow along the fixed frame 42 due to centrifugal force. During the flow, it is guided by the air inlet 43 into the moisture-absorbing cotton 44 between the wrapping ring 41 and the fixed frame 42. Due to the unidirectional movement of the rotating airflow, the airflow entering the moisture-absorbing cotton 44 is blown out from the air inlet 43 on the other side, thus completing the absorption of water vapor. Finally, driven by the internal air pressure, the treated airflow is discharged from the exhaust pipe of the exhaust connection plate 9.

[0053] During the wet washing process, experimental and control groups were set up, specifically as experimental group two and control group two. For experimental group two, a measurement point was set at the top of the guide hood 35, i.e., at the inlet pipe position; a second measurement point was set at the bottom of the inner cylinder 34; and a third measurement point was set at the outlet of the moisture absorption component 4. The measurement method used was isokinetic sampling-PTFE filter membrane weighing method. The subsequent particle size distribution was determined using a laser particle size analyzer.

[0054] Total dust (mg / m³) Particle size distribution (mg / m³) Top of fairing 35 442.2 Small to medium-sized dust particles (1-10μm): 302.7; Very fine dust particles (<1μm): 134.9 Bottom position of inner cylinder 34 104.8±2.1 Small to medium-sized dust particles (1-10 μm): 61.7 ± 1.0; Very fine dust particles (<1 μm): 43.1 ± 1.1 Moisture absorption component 4 outlet position 7.7±0.5 Small to medium-sized dust particles (1-10 μm): 1.9 ± 0.1; Very fine dust particles (<1 μm): 5.8 ± 0.4 System main exhaust port 4.45±0.20 Small to medium-sized dust particles (1-10μm): 0.55±0.05; Very fine dust particles (<1μm): 3.9±0.15

[0055] In control group two, measurement points were set at the inlet pipe, outlet pipe, and outlet pipe of the traditional wet scrubbing system, respectively. The measurement method also used was the isokinetic sampling-PTFE filter membrane weighing method.

[0056] Total dust (mg / m³) Particle size distribution (mg / m³) Traditional wet sprinkler inlet pipe 450.1 Large dust particles (>10μm): 17.84; Medium and small dust particles (1-10μm): 297.7; Fine dust particles (<1μm): 135 Traditional wet spray outlet pipe 143.21±6.45 Large particulate matter (>10μm): 6.4±0.3; Medium and small particulate matter (1-10μm): 98.01±3.9; Tiny particulate matter (<1μm): 38.8±1.25 Traditional demister outlet pipe 21.51±1.49 Small to medium-sized dust particles (1-10 μm): 7.11 ± 0.49; Very fine dust particles (<1 μm): 14.4 ± 1 System main exhaust port 15.5±1.5 Small to medium-sized dust particles (1-10 μm): 5 ± 0.5; Very fine dust particles (<1 μm): 10.5 ± 1.0

[0057] Since most of the large particles in Experimental Group 2 had been pre-removed by the grading experiment in the early stage, there were no large particles remaining after spraying. For large dust, the content was not displayed in the table when the concentration was too low (below 5mg / m³, and most of it could be removed during the spraying stage); while Control Group 2 did not have a pre-grading experiment, so its concentration was not displayed when it was too low (below 1mg / m³).

[0058] According to the table comparison, the total dust in experimental group 2 after spraying (4.45±0.2mg / m³) was only 28.7% of that in control group 2 (total dust: 15.5±1.5mg / m³), which demonstrates the system's high-efficiency dust capture capability. In summary, this system, through different combinations of design and spraying processes, makes the overall dust removal in the exhaust gas more thorough, improves the dust removal efficiency, and thus achieves the goal of enhancing the exhaust gas purification effect.

[0059] Example 2, refer to Figure 1 - Figure 11 This is the second embodiment of the present invention, which differs from the first embodiment in that: the separating component 5 includes a fixing ring 51 fixedly connected to the outer side wall of the inner cylinder 34, a damping rod 52 fixedly connected to the bottom outer wall of the fixing ring 51, a tension spring 53 sleeved on the outside of the damping rod 52, a sliding ring 54 fixedly connected to the bottom outer wall of the damping rod 52, a connecting rod 55 fixedly connected to the bottom outer wall of the sliding ring 54, and a supporting ring 56 fixedly connected to the bottom outer wall of the connecting rod 55. The outer side wall of the fixing ring 51 is fixedly connected to the inner side wall of the outer cylinder 31, the outer wall of the sliding ring 54 is slidably connected to the inner side wall of the outer cylinder 31 and the outer side wall of the inner cylinder 34, and the two ends of the tension spring 53 are fixedly connected to the outer wall of the fixing ring 51 and the outer wall of the sliding ring 54, respectively. The fixing ring 51, the sliding ring 54 and the supporting ring 56 are all annular and are in sealed contact with the outer cylinder 31 and the inner cylinder 34.

[0060] Specifically, the liquid concentrated in the storage cylinder 12 is discharged by the separator component 5 to prevent excessive liquid in the storage cylinder 12 and thus prevent liquid overflow. During the spraying process of the spraying component 6, due to the falling liquid, the liquid accumulates in the storage cylinder 12 due to gravity and is blocked by the support ring 56. During continuous spraying, the liquid gradually accumulates, and the total weight of the liquid on the support ring 56 gradually increases, causing the support ring 56 to be pressed down. The pressed support ring 56 will drive the connecting rod 55 and the sliding ring 54 to move down. Since the position of the fixed ring 51 is fixed, At this time, the damping rod 52 and the tension spring 53 are stretched, and the stretched tension spring 53 will generate an upward reaction force. When the support ring 56 descends to the bottom and the top of the support ring 56 descends to the lower end of the outlet pipe 15, the liquid accumulated inside flows out due to the liquid flow. This can be accomplished by opening and closing the outlet pipe 15 at regular intervals, thereby completing the discharge of the internally accumulated liquid. At the same time, because of the obstruction of the liquid, the airflow is difficult to exit from the outlet pipe 15, and large particles are removed in advance, so that the liquid that has captured the particles is unlikely to block the outlet pipe 15, thus ensuring the stable discharge of the liquid. The rest of the structure is the same as that of Embodiment 1.

[0061] Example 3, referring to Figure 1 - Figure 14 This is the third embodiment of the present invention, which differs from the second embodiment in that: the spraying assembly 6 includes a servo motor 610 fixedly connected to the outer wall of the outer cylinder 31 via a bracket, a drive gear 611 fixedly connected to the output end of the servo motor 610, an end face gear 612 meshing with the outer wall of the drive gear 611, a water injection ring 62 fixedly connected to the outer wall of the outer cylinder 31 via a bracket, a three-way pipe 61 fixedly connected to the outer wall of the water injection ring 62, a fixing pipe 63 fixedly connected to the inner wall of the water injection ring 62, and a fixing... A corrugated pipe 64 is connected to the end of the fixed pipe 63 away from the water injection ring 62; a spray pipe 67 is fixedly connected to the other end of the corrugated pipe 64; a rotating blade 68 is rotatably connected to the inner wall of the spray pipe 67; a positioning ring 65 is fixedly connected to the outer wall of the spray pipe 67; a rotating ring 66 is rotatably connected to the top outer wall of the positioning ring 65; and a limiting ring 69 is rotatably connected to the outer wall of the rotating ring 66. The top outer wall of the limiting ring 69 is fixedly connected to the bottom outer wall of the end face gear 612, and the limiting ring 69 is rotatably connected to the outer wall of the outer cylinder 31.

[0062] Specifically, the servo motor 610 is activated simultaneously with the entry of exhaust gas. The activation of the servo motor 610 causes the drive gear 611 to rotate, which in turn causes the end face gear 612 to rotate. The rotating end face gear 612 will cause the limiting ring 69 to rotate as well. Due to the trajectory setting on the limiting ring 69, the rotating ring 66 moving within the track is affected. At this time, the rotating ring 66 will move the positioning ring 65 along with it. The moving positioning ring 65 not only causes the spray pipe 67 to move, but also causes the bellows 64 to compress and stretch. Due to the setting of the bellows 64, the externally injected liquid can stably enter the moving spray pipe 67. During this process, a water pump connected to the three-way pipe 61 injects a weakly alkaline solution into the water injection ring 62. The solution passes through the water injection ring 62 into the fixed pipe 63, and then sequentially into the corrugated pipe 64 and the spray pipe 67. Upon entering the spray pipe 67, the solution, due to pressure and impact, causes the rotating blade 68 to rotate, resulting in the solution being evenly sprayed from the nozzle of the spray pipe 67. The moving spray pipe 67 also increases the spraying range, allowing the sprayed solution to flow out without adhering to the opening of the guide shroud 35; some solution can fall directly from the opening, thus increasing the contact area between the spray and the airflow. The remaining structure is the same as in Example 2.

[0063] Based on embodiments 1-3, the working principle of the waste gas purification system based on polyphenylene sulfide (PPS) of the present invention is as follows: After cooling, the waste gas is blown into the separation hopper 22 of the diversion component 2 through the inlet pipe 24, and rotates around the interior under the guidance of the guide block 23 and the shape of the separation hopper 22. Large clumps of PPS dust, due to inertia, cannot follow the airflow direction and are thrown out from the slots of the connecting ring 21 and the separation hopper 22. After being blocked by the support frame 11, they fall into the bottom ash hopper. The slots on the opposite side of the separation hopper 22 further enhance the separation effect of large dust. The rotating airflow drives medium and small dust particles to continue moving. Under the guidance of the separation hopper 22 and the influence of particle gravity, the airflow gradually moves downward. Due to the change in flow velocity, medium dust particles remain at the position of the dust removal nozzle 25 and then fall into the ash hopper under the action of gravity. The remaining airflow containing small dust particles rotates and rises along the central axis of the separation hopper 22 and enters the guide pipe 13.

[0064] The guide pipe 13 protects the rotating and rising airflow from interference. Its top, driven by a DC motor 8, strengthens the airflow rotation, accelerating its ascent. The airflow is guided by the guide ring 14 to the guide shroud 35, and then directed between the guide pipe 13 and the inner cylinder 34. At this time, the top spray assembly 6 is activated. The servo motor 610 drives the spray pipe 67 via gear transmission. A weakly alkaline solution enters the spray pipe 67 through the water injection ring 62 and the corrugated pipe 64, and is evenly sprayed out under the action of the rotating blades 68. The solution flows down along the groove of the guide shroud 35, making full contact with the airflow. Small and medium-sized particles are captured by water tension, simultaneously completing secondary cooling.

[0065] The cooled gas, carrying water droplets, rotates and rises under the constraint of the guide ring 33, the storage cylinder 12, and the outer cylinder 31, increasing the contact area with the liquid droplets to reduce their size. After detaching from the guide ring 33, the airflow enters the moisture-absorbing component 4 under the guidance of the guide groove 32 and continues to rotate. Under the action of centrifugal force, it flows along the fixed frame 42 and enters the moisture-absorbing cotton 44 between the wrapping ring 41 and the fixed frame 42 through the air inlet 43. After completing the absorption of water vapor, it flows to the exhaust connecting plate 9 under the push of the internal air pressure.

[0066] Due to gravity, the liquid accumulates in the storage cylinder 12, causing the supporting ring 56 to be pressed down by the liquid weight. This causes the connecting rod 55 and sliding ring 54 to move downwards, stretching the damping rod 52 and the tension spring 53. When the supporting ring 56 descends below the outlet pipe 15, the liquid is discharged through the outlet pipe 15. During the discharge process, due to the inclined design inside the outlet pipe 15, the liquid is difficult to flow back. During the liquid discharge process, the pressure causes the blocking cover 16 to be pushed open. The pushed-open blocking cover 16 stretches the rubber rope 17. After a certain volume of liquid has flowed out, the thrust generated by the pressure is lower than the elastic force generated by the rubber rope 17, causing the liquid to... This causes the blocking cover 16 to close quickly. During this process, the setting of the balance slot 18 ensures that the air pressure at the bottom of the support ring 56 is balanced, thereby ensuring the stable progress of the drainage process. At the same time, in conjunction with the setting of the blocking cover 16, it makes it difficult for liquid to flow back into the space below the support ring 56. By preventing liquid from flowing back into the space that is difficult to drain, it ensures that the bottom of the storage cylinder 12 is not corroded by the long-term accumulation of alkaline solution. The tension spring 53 resets and drives the support ring 56 to rise, preventing liquid from overflowing. In addition, because large particles are removed in advance, the liquid outlet pipe 15 is prevented from being blocked. Finally, the treated gas is discharged from the exhaust pipe of the exhaust connection plate 9.

[0067] Example 4, refer to Figure 1 - Figure 14 This is the fourth embodiment of the present invention, providing a waste gas purification process based on polyphenylene sulfide, comprising the following steps:

[0068] S1. Pre-cooling of exhaust gas: Dust-laden exhaust gas generated during the preparation of polyphenylene sulfide is introduced into a cooling device to cool down to 80 to 100 degrees Celsius, so as to avoid the impact of high temperature on subsequent equipment and solution stability.

[0069] S2. The cooled exhaust gas is introduced into the diversion component 2 through the air inlet pipe 24. The exhaust gas rotates in the separation hopper 22 under the action of the guide block 23. Large clumps of PPS dust are thrown out from the slot of the separation hopper 22 and the connecting ring 21 due to inertia. After being blocked by the support frame 11, they fall into the bottom ash hopper for collection. Medium dust settles down with the rotating airflow to the impurity removal nozzle 25 for separation. The remaining airflow containing small dust rotates and rises along the central axis of the separation hopper 22 and enters the diversion pipe 13.

[0070] S3. Wet particle capture: Start DC motor 8 to drive guide rod 7 to rotate, enhance the upward rotation of airflow, and start spray assembly 6 at the same time; Servo motor 610 drives spray pipe 67 to move through gear transmission. Weak alkaline solution enters spray pipe 67 through three-way pipe 61, water injection ring 62, and corrugated pipe 64. It is evenly sprayed by rotating blade 68. The solution flows down along the groove of guide shroud 35 and comes into contact with the rotating airflow between guide pipe 13 and inner cylinder 34. Small and medium-sized dust particles are captured by liquid flow tension, and secondary cooling is completed.

[0071] S4. The gas containing water vapor and liquid droplets is guided by the guide ring 33 and rotates and rises between the storage cylinder 12 and the outer cylinder 31. The liquid droplets gather due to centrifugal force, causing water vapor to enter the moisture absorption component 4 with the airflow. It enters the moisture absorption cotton 44 between the wrapping ring 41 and the fixed frame 42 through the air inlet 43 of the fixed frame 42. The airflow is discharged after the water vapor is removed by the moisture absorption cotton 44.

[0072] S5. The gas, after being filtered and dehydrated by the filter screen, is discharged through the exhaust connection plate 9 and enters the subsequent filter screen to further intercept residual small particles and possible soluble salt spray, and finally is discharged from the exhaust pipe in compliance with standards.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A waste gas purification system based on polyphenylene sulfide, comprising a packaging assembly (1), the packaging assembly (1) comprising a support frame (11), a storage cylinder (12) fixedly disposed on the top outer wall of the support frame (11), a drainage pipe (13) disposed on the bottom inner wall of the storage cylinder (12), a guide ring (14) disposed on the top outer wall of the drainage pipe (13), a liquid outlet pipe (15) disposed on the inner wall of the storage cylinder (12), a balance slot (18) opened in the liquid outlet pipe (15), a rubber rope (17) disposed on the outer wall of the liquid outlet pipe (15), and a blocking cap (16) disposed at one end of the rubber rope (17), characterized in that, It also includes a diversion component (2) disposed on the bottom outer wall of the storage cylinder (12), a moisture absorption component (4) disposed on the top outer wall of the storage cylinder (12), an exhaust connection plate (9) disposed on the top outer wall of the moisture absorption component (4), a processing component (3) disposed on the inner side wall of the exhaust connection plate (9), a separation component (5) disposed on the inner wall of the processing component (3), a spraying component (6) disposed on the inner wall of the processing component (3), a DC motor (8) disposed on the top outer wall of the processing component (3), and a guide rod (7) disposed on the output end of the DC motor (8). The diversion assembly (2) includes a connecting ring (21) fixedly disposed on the bottom outer wall of the storage cylinder (12), a separation hopper (22) disposed on the inner side wall of the connecting ring (21), a cleaning nozzle (25) disposed on the bottom outer wall of the separation hopper (22), a guide block (23) disposed on the outer wall of the separation hopper (22), and an air inlet pipe (24) disposed on the outer wall of the guide block (23). The processing component (3) includes an outer cylinder (31) fixedly disposed on the inner side wall of the exhaust connecting plate (9), and the separating component (5) includes a fixing ring (51) disposed on the outer side wall of the inner cylinder (34), a damping rod (52) disposed on the bottom outer wall of the fixing ring (51), a tension spring (53) disposed on the outside of the damping rod (52), a sliding ring (54) disposed on the bottom outer wall of the damping rod (52), a connecting rod (55) disposed on the bottom outer wall of the sliding ring (54), and a supporting ring (56) disposed on the bottom outer wall of the connecting rod (55). The moisture-absorbing component (4) is used to dehumidify the gas after wet particle capture and protect the subsequent processing components; the processing component (3) is used for airflow guidance and assists in wet particle capture.

2. The waste gas purification and treatment system based on polyphenylene sulfide according to claim 1, characterized in that: The moisture-absorbing component (4) includes a wrapping ring (41) fixedly disposed on the top outer wall of the storage cylinder (12), a fixing frame (42) disposed on the outer wall of the wrapping ring (41), an air inlet slot (43) opened on the outer wall of the fixing frame (42), and moisture-absorbing cotton (44) disposed on the outer wall of the fixing frame (42). The top outer wall of the wrapping ring (41) is fixedly connected to the bottom outer wall of the exhaust connection plate (9).

3. The waste gas purification and treatment system based on polyphenylene sulfide according to claim 2, characterized in that: The processing component (3) further includes a guide groove (32) opened on the outer wall of the outer cylinder (31), a guide ring (33) set on the outer side wall of the outer cylinder (31), an inner cylinder (34) set on the inner outer wall of the outer cylinder (31), and a flow guide shroud (35) set on the inner side wall of the inner cylinder (34). The inner wall of the flow guide shroud (35) and the interior of the inner cylinder (34) are rotatably connected to the outer wall of the flow guide rod (7). The outer wall of the top of the inner cylinder (34) is fixedly connected to the outer wall of the bottom of the DC motor (8).

4. The waste gas purification and treatment system based on polyphenylene sulfide according to claim 3, characterized in that: The outer sidewall of the fixed ring (51) is fixedly connected to the inner sidewall of the outer cylinder (31), the outer wall of the sliding ring (54) is slidably connected to the inner sidewall of the outer cylinder (31) and the outer sidewall of the inner cylinder (34), and the two ends of the tension spring (53) are fixedly connected to the outer wall of the fixed ring (51) and the outer wall of the sliding ring (54), respectively.

5. The waste gas purification and treatment system based on polyphenylene sulfide according to claim 4, characterized in that: The fixed ring (51), sliding ring (54) and supporting ring (56) are all annular and are in sealed contact with the outer cylinder (31) and inner cylinder (34).

6. The waste gas purification and treatment system based on polyphenylene sulfide according to claim 3, characterized in that: The spraying assembly (6) includes a servo motor (610) fixedly mounted on the outer wall of the outer cylinder (31) by a bracket, a drive gear (611) mounted on the output end of the servo motor (610), an end face gear (612) mounted on the outer wall of the drive gear (611), a water injection ring (62) fixedly mounted on the outer wall of the outer cylinder (31) by a bracket, a three-way pipe (61) mounted on the outer wall of the water injection ring (62), a fixing pipe (63) mounted on the inner wall of the water injection ring (62), a corrugated pipe (64) mounted on the end of the fixing pipe (63) away from the water injection ring (62), a spray pipe (67) mounted on the other end of the corrugated pipe (64), a rotating blade (68) mounted on the inner wall of the spray pipe (67), a positioning ring (65) mounted on the outer wall of the spray pipe (67), a rotating ring (66) mounted on the top outer wall of the positioning ring (65), and a limiting ring (69) mounted on the outer wall of the rotating ring (66).

7. The waste gas purification and treatment system based on polyphenylene sulfide according to claim 6, characterized in that: The outer wall of the top of the limiting ring (69) is fixedly connected to the outer wall of the bottom of the end face gear (612), and the limiting ring (69) is rotatably connected to the outer wall of the outer cylinder (31).

8. A waste gas purification process based on polyphenylene sulfide, employing a waste gas purification system based on polyphenylene sulfide as described in any one of claims 6-7, characterized in that, Includes the following steps: S1. Pre-cooling of exhaust gas: Dust-laden exhaust gas generated during the preparation of polyphenylene sulfide is introduced into a cooling device to cool down to 80 to 100 degrees Celsius to avoid the impact of high temperature on subsequent equipment and solution stability. S2. The cooled exhaust gas is introduced into the diversion assembly (2) through the air inlet pipe (24). The exhaust gas rotates in the separation hopper (22) under the action of the guide block (23). Large clumps of PPS dust are thrown out from the slot of the separation hopper (22) and the connecting ring (21) due to inertia. After being blocked by the support frame (11), they fall into the bottom ash hopper for collection. Medium dust settles down with the rotating airflow to the dust removal nozzle (25) for separation. The remaining airflow containing small dust rotates and rises along the central axis of the separation hopper (22) and enters the diversion pipe (13). S3. Wet capture of particles, start DC motor (8) to drive guide rod (7) to rotate, enhance the upward rotation of airflow, and start spray assembly (6); servo motor (610) drives spray pipe (67) to move through gear transmission. Weak alkaline solution enters spray pipe (67) through three-way pipe (61), water injection ring (62) and corrugated pipe (64). It is evenly sprayed by rotating blade (68). The solution flows down along the groove of guide shroud (35) and comes into contact with the rotating airflow between guide pipe (13) and inner cylinder (34). Small and medium dust particles are captured by liquid flow tension, and secondary cooling is completed. S4. The gas containing water vapor and liquid droplets is guided by the guide ring (33) and rotates and rises between the storage cylinder (12) and the outer cylinder (31). The liquid droplets gather due to centrifugal force, so that the water vapor enters the moisture absorption component (4) with the airflow and enters the moisture absorption cotton (44) between the wrapping ring (41) and the fixed frame (42) through the air inlet slot (43) of the fixed frame (42). The airflow is discharged after the water vapor is removed by the moisture absorption cotton (44). S5. After being filtered and dehydrated, the gas is discharged through the exhaust connection plate (9) and enters the subsequent filter screen to further intercept residual small particles and possible soluble salt spray, and finally discharged from the exhaust pipe in compliance with standards.

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