A device and removal process for reducing the content of VOCs in styrene-acrylic emulsion

Abstract

The application discloses a device and a removal process for reducing VOCs content in a styrene-acrylic emulsion, and particularly relates to the field of styrene-acrylic emulsion processing technology, comprising a tower body with an open design at the top, a tower cover is installed at the top of the tower body, a pressure gauge is communicated and installed at one side of the top of the tower cover and is communicated with the tower body, a discharge pipe is communicated and installed at one side of the bottom of the tower body, and a feeding pipe is communicated and installed at one side of the top of the tower cover. The application completes multi-point synchronous gravity drop settling of the introduced emulsion by a dispersing mechanism to discharge gas, continuously disperses the emulsion by a dispersing part, and removes VOCs gas in the process of dispersing and throwing out of the emulsion, and the emulsion collides with the inner wall of the tower body in the process of throwing out, so that the VOCs in the emulsion is forced to be rapidly released, the overall removal efficiency is improved, the removal mode of the emulsion in multiple modes is simultaneously completed in the tower body, and the removal precision and removal efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of styrene-acrylic emulsion processing technology, specifically to a device and removal process for reducing the VOCs content in styrene-acrylic emulsions. Background Technology

[0002] Styrene-acrylic emulsion is obtained by emulsion copolymerization of styrene and acrylate monomers. It has good water resistance, alkali resistance, and scrubbing resistance, and is also resistant to outdoor aging. It is widely used in adhesives, coatings and other fields.

[0003] Unreacted free monomers and added film-forming aids during the production of styrene-acrylic emulsions result in a large amount of volatile organic compounds (VOCs) in the product. These VOCs not only pollute the environment but also seriously endanger human health. Therefore, post-treatment of styrene-acrylic emulsions is necessary after production to remove VOCs and ensure the quality of the emulsions.

[0004] Publication (Announcement) No.: CN106366218A discloses an apparatus and process for removing VOCs from styrene-acrylic emulsion. The removal apparatus uses a mixed styrene-acrylic emulsion to enter a spray tower, where it is sprayed into droplets by a nozzle. The droplets fall downwards inside the spray tower, and under negative pressure, VOCs are removed from the droplets to obtain VOCs-removed styrene-acrylic emulsion droplets. The VOCs-removed styrene-acrylic emulsion droplets fall to the bottom of the spray tower to form a VOCs-removed styrene-acrylic emulsion liquid layer.

[0005] The aforementioned removal device removes VOCs by spraying the emulsion through a nozzle. Although it can remove simple VOCs, the emulsion falls vertically for a short time after spraying, and the sprayed emulsions are prone to mutual interference, which limits the separation of VOCs from the emulsion and results in an unsatisfactory removal effect, causing VOCs to be unable to be fully removed from the emulsion.

[0006] Furthermore, the aforementioned removal devices employ a relatively singular method for VOCs removal and cannot simultaneously utilize multiple methods to remove VOCs from emulsions. Consequently, VOCs cannot be removed from emulsions quickly and sufficiently, resulting in limited removal accuracy. This leads to a prolonged overall removal cycle, requiring repeated removal processes and increasing removal costs. Summary of the Invention

[0007] The purpose of this invention is to provide an apparatus and removal process for reducing the VOCs content in styrene-acrylic emulsions, so as to solve the above-mentioned technical problems.

[0008] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0009] The present invention relates to a device for reducing the VOCs content in styrene-acrylic emulsion, which comprises a tower body with an open top. A tower cover is installed on the top of the tower body. On one side of the top of the tower cover, a pressure gauge communicating with the inside of the tower body is connected and installed. On one side of the bottom of the tower body, a discharge pipe is connected and installed. On one side of the top of the tower cover, a feed pipe is connected and installed. At the top inside the tower body, a dispersing mechanism is installed. The feed pipe is communicated with the dispersing mechanism. The dispersing mechanism is used to introduce the emulsion, complete multi-point discharge and dispersion, and impact with the inner wall of the tower body, and complete the removal of gas through the dispersing mechanism. Below the dispersing mechanism inside the tower body, a dripping mechanism is installed. The dripping mechanism is arranged in cooperation with the dispersing mechanism. The dripping mechanism is used to collect the emulsion after being dispersed and removed by the dispersing mechanism and complete multi-point dripping action. And a driving mechanism is inserted into the tower body from the top of the tower cover. The driving mechanism is respectively传动连接完成联动with the dispersing mechanism and the dripping mechanism to complete linkage;

[0010] The driving mechanism includes a driving motor installed at the center of the top of the tower cover through a bracket. At the output end of the driving motor, a power shaft is传动安装. The power shaft correspondingly extends into the tower body and is传动连接with the dispersing mechanism and the dripping mechanism. At the bottom outside the power shaft, two sets of stirring blades are fixedly sleeved below the dripping mechanism.

[0011] Further, the dispersing mechanism includes an annular cavity installed at the top inside the tower body through a bracket, and the annular cavity is communicated with the feed pipe. At the bottom of the annular cavity, a plurality of spray pipes are communicated and distributed in a circular array. At the bottom of each of the plurality of spray pipes, a nozzle is detachably connected and installed. At the bottom of the annular cavity, a plurality of dispersing parts are arranged in a circular array. The plurality of dispersing parts are respectively distributed on one side of the plurality of spray pipes. The emulsion is dispersed at multiple points and then thrown out through the plurality of dispersing parts. Above the annular cavity, a fixed frame is concentrically installed. The fixed frame is correspondingly detachably sleeved outside the power shaft. At the bottom of the fixed frame, an external gear ring is concentrically installed. On one side of the top of the tower cover, an exhaust pipe is connected and installed. At the bottom of one side of the tower body, a vacuum pump is installed through a bracket. The bottom of the exhaust pipe is communicated with the input end of the vacuum pump. At the output end of the vacuum pump, a discharge pipe is connected and installed.

[0012] Further, each of the plurality of dispersing parts includes a rotating shaft rotatably penetrating through the annular cavity. At the bottom outer surface of the rotating shaft, an external thread area is provided. On the external thread area of the rotating shaft, a thread sleeve is sleeved by thread screwing. At the bottom end outside the thread sleeve, a dispersing disc is concentrically sleeved. On the upper surface of the dispersing disc, a plurality of dispersing plates are arranged in a circular array. And the dispersing disc is correspondingly arranged with the nozzle. At the top of the rotating shaft, a gear is fixedly sleeved. The gear is meshed and传动连接with the external gear ring.

[0013] It should be noted that there are some inaccuracies in the original Chinese text, such as "传动连接完成联动" which is an incorrect expression. The above translation tries to make sense of the overall context while maintaining the original text structure as much as possible.Furthermore, three open-topped constraint frames are arranged in a circular array at the bottom of the dispersing plate. A sealing cover is detachably installed at the top opening of the constraint frame via bolts. A counterweight is slidably installed at the bottom inside the constraint frame. A return spring is installed between the front end of the counterweight and the constraint frame. A fixing plate is installed on the top of the inner wall of the constraint frame away from the counterweight. A swing arm is rotatably installed on the fixing plate via a pin. A first linkage arm and a second linkage arm are respectively hinged to both ends of the swing arm. A push rod is installed on one side of the upper surface of the counterweight. The front end of the push rod is hinged to the tail end of the first linkage arm. A pressure rod is slidably installed through the front end of the constraint frame. The tail end of the pressure rod is hinged to the tail end of the second linkage arm, and an arc-shaped pressure plate is installed at the front end of the pressure rod.

[0014] Furthermore, the arc-shaped pressure plates on the three limiting frames achieve contact restriction with the rotating shaft, while the counterweight is moved under centrifugal force to provide continuous thrust to the pressure rod and the arc-shaped pressure plates to maintain stability.

[0015] Furthermore, the dripping mechanism includes an annular component installed inside the tower body. An annular plate is integrally formed at the bottom edge of the outer wall of the annular component. Multiple dripping holes are evenly distributed through the annular plate. The annular plate is detachably fixed to the inner wall of the tower body. A concentric tapered filter cylinder is installed on the top of the annular component. The tapered filter cylinder is rotatably connected to the power shaft. A fixing ring is fitted outside the power shaft. Three scrapers are arranged in a circular array on the sidewalls around the fixing ring. All three scrapers are in scraping contact with the outside of the tapered filter cylinder.

[0016] Furthermore, an annular space is formed between the annular plate and the tower body. Three scraper blocks are arranged in a circular array within this annular space, and the three scraper blocks are fixedly connected to the three scraper blades to complete the linkage.

[0017] Furthermore, a connecting ring is fixedly sleeved above the fixing ring outside the power shaft. Three mounting brackets are arranged in a circular array around the outer wall of the connecting ring. A cleaning plate is installed at the tail of each of the three mounting brackets. The cleaning plate contacts the inner wall of the tower body to complete the cleaning of the tower body.

[0018] Furthermore, two flow guiding zones are symmetrically opened on both sides of the conical filter cartridge.

[0019] This invention also provides a removal process for equipment used to reduce VOCs content in styrene-acrylic emulsions, the removal process specifically including the following steps:

[0020] Step 1: First, introduce the emulsion through the feed pipe, and then guide the emulsion into the dispersing mechanism through the feed pipe;

[0021] Step 2: Then, the gas is discharged by multi-point synchronous gravity dripping and settling of the introduced emulsion through the dispersing mechanism, and the gas precipitated in the tower is extracted by the dispersing mechanism at the same time.

[0022] Step 3: At the same time, the dripping emulsion comes into contact with the corresponding dispersing mechanism. The dispersing mechanism continuously disperses the emulsion. During the process of the emulsion being dispersed and thrown out by the dispersing mechanism, VOCs gas is removed. At the same time, the emulsion collides with the inner wall of the tower during the throwing process. During the collision with the tower body, the VOCs in the emulsion are forced to be released quickly, which improves the overall removal efficiency.

[0023] Step 4: With the assistance of the dripping mechanism, the emulsion after impact enters the dripping mechanism to be intercepted. Then, the VOCs gas is subjected to multi-point gravity sedimentation again through the dripping mechanism. The emulsion then drips from the dripping mechanism to the bottom of the tower to complete the removal of VOCs.

[0024] Step 5: Simultaneously, the dripping mechanism can clean itself and the inner wall of the tower at the same time. During the cleaning process, it agitates the emulsion to prevent it from accumulating and clogging, ensuring the stable flow of the emulsion and promoting the re-release of VOCs gas inside the emulsion, thereby increasing the collection and dripping speed.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The present invention is provided with a dispersing mechanism. The emulsion is sprayed out by a nozzle to complete the gravity sedimentation and release the gas. The emulsion sprayed by the nozzle comes into contact with the dispersing part on the free fall path. The dispersing plate and multiple dispersing plates on it rotate at high speed to disperse the free fall emulsion. During the dispersing process, the gas inside the emulsion is discharged and removed. At the same time, the emulsion that is still accumulated on the dispersing plate after being dispersed is thrown out by the dispersing plate and collides with the inner wall of the tower. During the collision, the gas is forced to be released again.

[0027] 2. In this invention, when the dispersing disc rotates at high speed, the counterweights in the three limiting frames at the bottom of the dispersing disc move under centrifugal force and compress the return spring. As the counterweights move, they push the push rod forward and move the first linkage arm, which in turn drives the swing arm to rotate and drives the second linkage arm to follow the movement. The second linkage arm provides thrust to the pressure rod and the arc-shaped pressure plate, which drives the arc-shaped pressure plate to move forward and continuously press against the outer wall of the rotating shaft. This prevents the dispersing disc from rotating unstably during high-speed rotation, and the higher the rotation speed of the dispersing disc, the greater the thrust provided to the arc-shaped pressure plate, thus ensuring the stability of the dispersing disc.

[0028] 3. This invention incorporates a dripping mechanism, where the emulsion drips into the conical filter cylinder and annular space of the dripping mechanism. Then, under the influence of gravity, the emulsion drips from multiple points towards the bottom of the tower through holes distributed on the conical filter cylinder and multiple dripping holes. During the dripping process, the gas in the emulsion is removed again. Through the dispersion mechanism, driving mechanism, and dripping mechanism, multiple removal actions are completed within the tower, enabling the gas in the emulsion to be removed efficiently and stably, thus improving the removal efficiency.

[0029] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0030] Figure 1 This is the overall front view of the invention;

[0031] Figure 2 This is a schematic diagram of the interior of the tower body of the present invention;

[0032] Figure 3 This is a schematic diagram showing the separation of the dispersing mechanism from the tower body according to the present invention;

[0033] Figure 4 This is a schematic diagram showing the distribution of the dispersing mechanism and the dripping mechanism of the present invention;

[0034] Figure 5 This is a schematic diagram showing the connection between the driving mechanism and the dripping mechanism of the present invention;

[0035] Figure 6 This is a schematic diagram of the dispersing mechanism of the present invention installed inside the tower.

[0036] Figure 7 This is a schematic diagram of the stirring blades of the present invention mounted on the power shaft;

[0037] Figure 8 This is a schematic diagram showing the connection between the driving mechanism and the dispersing mechanism of the present invention;

[0038] Figure 9 This is a schematic diagram of the dispersing mechanism of the present invention;

[0039] Figure 10 This is a schematic diagram showing the distribution of the multiple dispersing parts and the outer gear ring of the present invention;

[0040] Figure 11 This is a schematic diagram of the meshing of the external gear ring and the gear of the present invention;

[0041] Figure 12 This is a schematic diagram showing the distribution of the multiple dispersing parts in this invention;

[0042] Figure 13 This is a schematic diagram showing the separation of the dispersing disc and the rotating shaft according to the present invention;

[0043] Figure 14 This is a schematic diagram showing the distribution of the three limiting frames at the bottom of the dispersing plate according to the present invention;

[0044] Figure 15 This is a schematic diagram of the internal structure of the limiting frame of the present invention;

[0045] Figure 16 This is a schematic diagram showing the distribution of the pressure bar and counterweight components of the present invention.

[0046] In the diagram: 1. Tower body; 2. Tower cover; 3. Pressure gauge; 4. Discharge pipe; 5. Feed pipe; 6. Drive motor; 7. Power shaft; 8. Agitator blades; 9. Annular cavity; 10. Spray pipe; 11. Nozzle; 12. Fixing frame; 13. External gear ring; 14. Exhaust pipe; 15. Vacuum pump; 16. Venting pipe; 17. Rotating shaft; 18. External threaded area; 19. Threaded sleeve; 20. Dispersing disc; 21. Dispersing plate; 22. Gear; 23. Restricting frame; 24. Restriction. 25. Frame; 26. Sealing cover; 27. Counterweight; 28. Return spring; 29. ​​Fixing plate; 20. Swing arm; 31. First linkage arm; 32. Second linkage arm; 33. Push rod; 34. Pressure rod; 35. Arc-shaped pressure plate; 36. Annular part; 37. Annular plate; 38. Drip hole; 39. Conical filter cartridge; 40. Fixing ring; 41. Scraper; 42. Annular space; 43. Scraper block; 44. Connecting ring; 45. Mounting bracket; 46. Cleaning plate; 47. Guide zone. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0048] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0049] Example 1: The present invention provides a technical solution: such as Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 8As shown, a device for reducing VOCs content in styrene-acrylic emulsion includes a tower body 1 with an open top design. A tower cover 2 is detachably and sealed to the top of the tower body 1 by bolts. A pressure gauge 3, connected to the inside of the tower body 1, is installed on one side of the top of the tower cover 2 to monitor the pressure inside the tower body 1. A discharge pipe 4 is installed on one side of the bottom of the tower body 1, and a pump for pumping material is installed at the end of the discharge pipe 4. An inlet pipe 5 is installed on one side of the top of the tower cover 2, and a solenoid valve for controlling its opening and closing is installed at the end of the inlet pipe 5. The tower body is equipped with a dispersing mechanism. The feed pipe 5 is connected to the dispersing mechanism. The dispersing mechanism is used to introduce the emulsion and complete multi-point discharge and dispersing, and to impact the inner wall of the tower body 1. The dispersing mechanism is also used to remove the gas. A dripping mechanism is installed below the dispersing mechanism inside the tower body 1. The dripping mechanism is set in conjunction with the dispersing mechanism. The dripping mechanism is used to collect the emulsion after it is dispersed and removed by the dispersing mechanism and complete the multi-point dripping action. A drive mechanism is installed from the top of the tower cover 2 into the tower body 1. The drive mechanism is connected to the dispersing mechanism and the dripping mechanism respectively to complete the linkage.

[0050] The drive mechanism includes a drive motor 6 mounted on the top center of the tower cover 2 via a bracket. A power shaft 7 is driven and installed at the output end of the drive motor 6. The power shaft 7 extends into the tower body 1 and is connected to the dispersing mechanism and the dripping mechanism. Two sets of stirring blades 8 are fixedly sleeved on the bottom of the power shaft 7 below the dripping mechanism.

[0051] The electrical control components in the dispersing mechanism, driving mechanism, and dripping mechanism are all connected to switches via wires, and the switches are electrically connected to controllers. The specific structure of the controllers is not limited.

[0052] Example 2: Based on the disintegration mechanism provided in Example 1, this example provides a further technical solution for the disintegration mechanism.

[0053] like Figure 3 , Figure 6 and Figures 9-16As shown, the dispersing mechanism includes an annular cavity 9 installed at the top of the tower body 1 via a bracket, and the annular cavity 9 is connected to the feed pipe 5. Multiple nozzles 10 are arranged in a circular array at the bottom of the annular cavity 9, and nozzles 11 are detachably connected to the bottom of each nozzle 10. Multiple dispersing parts are arranged in a circular array at the bottom of the annular cavity 9, and the multiple dispersing parts are distributed on one side of each nozzle 10. The emulsion is dispersed at multiple points and thrown out by the multiple dispersing parts. A fixed frame 12 is concentrically installed above the annular cavity 9. The fixed frame 12 is detachably fixed to the outside of the power shaft 7. An external gear ring 13 is concentrically installed at the bottom of the fixed frame 12. An exhaust pipe 14 is connected to one side of the top of the tower cover 2, and a vacuum pump 15 is installed at the bottom of one side of the tower body 1 via a bracket. The bottom of the exhaust pipe 14 is connected to the input end of the vacuum pump 15, and a vent pipe 16 is connected to the output end of the vacuum pump 15. The vacuum pump 15 and the exhaust pipe 14 complete the pumping of the gas precipitated in the tower body 1.

[0054] During the dispersing process: the emulsion is introduced into the annular cavity 9 through the feed pipe 5 by the dispersing mechanism, and then the emulsion is diverted into multiple nozzles 10. Finally, the emulsion is diverted and sprayed out by the nozzle 11 to complete gravity sedimentation and release gas. The emulsion sprayed out by the nozzle 11 comes into contact with the dispersing part on the path of free fall.

[0055] Simultaneously, the drive motor 6 of the drive mechanism outputs power, which drives the external gear ring 13 to rotate via the power shaft 7, thereby driving multiple gears 22 to rotate. The linkage shaft 17 and the dispersing disc 20 rotate at a circumferential speed. The high-speed rotation of the dispersing disc 20 and its multiple dispersing plates 21 disperses the freely falling emulsion. Subsequently, the emulsion falls from the inner wall and interior of the tower body 1. During the dispersing process, the gas inside the emulsion is discharged and removed. At the same time, the emulsion that is still accumulated on the dispersing disc 20 after being dispersed is thrown out and collides with the inner wall of the tower body 1. During the collision, the gas is forced to precipitate again. The dispersing mechanism completes the removal of the emulsion in the tower body 1 in multiple ways, which improves the removal efficiency. At the same time as the gas is removed, the vacuum pump 15 and the exhaust pipe 14 complete the pumping of the gas precipitated in the tower body 1.

[0056] Each of the multiple dispersing sections includes a rotating shaft 17 that rotatably passes through the annular cavity 9. An external threaded area 18 is provided at the bottom of the outer surface of the rotating shaft 17. A threaded sleeve 19 is screwed onto the external threaded area 18 outside the rotating shaft 17. A dispersing disc 20 is concentrically fitted at the bottom of the threaded sleeve 19. The dispersing disc 20 is located below the nozzle 11. Multiple dispersing plates 21 are arranged in a circular array on the upper surface of the dispersing disc 20. The multiple dispersing plates 21 are divided into multiple dispersing spaces on the dispersing disc 20, and the dispersing disc 20 is correspondingly arranged with the nozzle 11. A gear 22 is fixedly fitted on the top of the rotating shaft 17. The gear 22 meshes with the external gear ring 13 for transmission. An annular protective cover can be added between the external gear ring 13 and the gear 22 to cover and protect both. Multiple limiting frames 23 are distributed in a circular array at the bottom of the annular cavity 9. The multiple limiting frames 23 are rotatably fitted onto the outside of the multiple rotating shafts 17. The limiting frames 23 are used to stabilize and limit the rotating shafts 17.

[0057] In this embodiment of the invention, three open-topped limiting frames 24 are arranged in a circular array at the bottom of the dispersing plate 20. A sealing cover 25 is detachably installed at the open top of each limiting frame 24 via bolts. A counterweight 26 is slidably installed inside the bottom of each limiting frame 24. A return spring 27 is provided between the front end of the counterweight 26 and the limiting frame 24. A fixing plate 28 is installed on the top of the inner wall of the limiting frame 24 away from the counterweight 26. A swing arm 29 is rotatably installed on the fixing plate 28 via a pin. A first linkage arm 30 and a second linkage arm 31 are hinged to both ends of the swing arm 29. A counterweight 26 is installed on one side of its upper surface. There is a push rod 32, the front end of which is hinged to the tail of the first linkage arm 30. A pressure rod 33 is slidably installed through the front end of the limiting frame 24. The tail of the pressure rod 33 is hinged to the tail of the second linkage arm 31. An arc-shaped pressure plate 34 is installed at the front end of the pressure rod 33. The arc-shaped pressure plate 34 is in contact with the outer wall of the rotating shaft 17. An anti-slip pad is installed on the inner wall of the arc-shaped pressure plate 34 facing the rotating shaft 17. The contact and restriction with the rotating shaft 17 are achieved by the arc-shaped pressure plates 34 on the three limiting frames 24. At the same time, the counterweight 26 is moved under the drive of centrifugal force to provide a continuous thrust to the pressure rod 33 and the arc-shaped pressure plate 34 to maintain stability.

[0058] Meanwhile, the distance between the dispersing disc 20 and the nozzle 11 can be adjusted by rotating the threaded sleeve 19 on the external thread area 18, which is convenient for switching and adjusting according to the removal needs, and also makes it easy to disassemble, replace, clean and maintain the dispersing disc 20.

[0059] Furthermore, when the dispersing disc 20 rotates at high speed, the counterweight 26 within the three limiting frames 24 at the bottom of the dispersing disc 20 moves under centrifugal force and compresses the return spring 27. During the movement of the counterweight 26, the push rod 32 moves forward and moves the first linkage arm 30, driving the swing arm 29 to rotate and driving the second linkage arm 31 to follow the movement. The second linkage arm 31 provides thrust to the pressure rod 33 and the arc-shaped pressure plate 34, driving the arc-shaped pressure plate 34 to move forward and continuously press against the outer wall of the rotating shaft 17, thus preventing the dispersing disc 20 from rotating with the others during high-speed rotation. At the same time, the weight of the counterweight 26 can be adjusted to achieve different levels of thrust on the arc-shaped pressure plate 34. The higher the rotation speed of the dispersing disc 20, the greater the thrust provided to the arc-shaped pressure plate 34, ensuring the stability of the dispersing disc 20. When the dispersing disc 20 stops rotating, the return spring 27 pushes the counterweight 26 back to its original position.

[0060] Example 3: Based on the dripping mechanism provided in Example 1, this example provides a further technical solution for the dripping mechanism.

[0061] like Figure 4 and Figure 5 As shown, the dripping mechanism includes an annular component 35 installed inside the tower body 1. An annular plate 36 is integrally provided at the bottom edge of the outer wall of the annular component 35. Multiple dripping holes 37 are evenly distributed on the annular plate 36, and the diameter of the dripping holes 37 and the conical filter cylinder 38 can be adjusted according to actual needs. The annular plate 36 is detachably fixed to the inner wall of the tower body 1. A conical filter cylinder 38 is concentrically installed on the top of the annular component 35. Multiple filter holes are evenly distributed on the conical filter cylinder 38. The gas is removed by multi-point gravity sedimentation of the emulsion through the conical filter cylinder 38 and the multiple dripping holes 37. The conical filter cylinder 38 is rotatably connected to the power shaft 7 through a bearing. A fixing ring 39 is sleeved on the outside of the power shaft 7. Three scrapers 40 are arranged in a circular array on the side wall of the fixing ring 39. All three scrapers 40 are in scraping contact with the outside of the conical filter cylinder 38.

[0062] During the drip removal process: the emulsion processed by the dispersing mechanism falls onto the dripping mechanism, and the cleaning plate 45 is continuously rotated by the power shaft 7 to continuously scrape off the emulsion remaining on the inner wall of the tower body 1, ensuring the cleanliness of the inner wall of the tower body 1. At the same time, it accelerates the accumulation of the emulsion towards the dripping mechanism. Then, the emulsion drips into the conical filter cylinder 38 and the annular space 41 of the dripping mechanism. Then, under the action of gravity, the emulsion drips from multiple points to the bottom of the tower body 1 through the holes distributed on the conical filter cylinder 38 and multiple dripping holes 37. During the dripping process, the gas in the emulsion is removed again.

[0063] Furthermore, driven by the power shaft 7, the three scrapers 40 and scraper blocks 42 are rotated. The three scrapers 40 and three scraper blocks 42 work together to scrape and clean the emulsion in the conical filter cylinder 38 and the annular space 41, preventing emulsion accumulation, accelerating the flow of emulsion, and reducing the difficulty of subsequent manual cleaning. Two guide zones 46 are provided on the conical filter cylinder 38. Through the guide zones 46, the emulsion can be concentrated and discharged into the bottom of the tower body 1, avoiding the problem of emulsion accumulation and blockage on the conical filter cylinder 38. At the same time, the stirring blades 8 at the bottom of the power shaft 7 continuously rotate to agitate the emulsion accumulated at the bottom of the tower body 1, promoting the continuous discharge of gas in the emulsion. Through the dispersing mechanism, driving mechanism and dripping mechanism, multiple removal actions are completed in the tower body 1, so that the gas in the emulsion is efficiently and stably removed, improving the removal efficiency.

[0064] In this embodiment of the invention, an annular space 41 is formed between the annular plate 36 and the tower body 1. Three scraper blocks 42 are arranged in a circular array within the annular space 41. The three scraper blocks 42 clean the annular space 41. The three scraper blocks 42 are fixedly connected to the three scraper plates 40 to achieve linkage. A connecting ring 43 is fixedly sleeved above the fixing ring 39 outside the power shaft 7. Three mounting brackets 44 are arranged in a circular array around the outer wall of the connecting ring 43. A cleaning plate 45 is installed at the tail of each of the three mounting brackets 44. The cleaning plate 45 contacts the inner wall of the tower body 1 to clean the tower body 1. The conical filter cylinder 38 is made entirely of metal. Two guide zones 46 are symmetrically opened on both sides of the conical filter cylinder 38. The emulsion is quickly guided to the bottom of the tower body 1 through the two guide zones 46.

[0065] Example 4: A process for reducing VOCs content in styrene-acrylic emulsions, the process specifically including the following steps:

[0066] Step 1: First, the emulsion is introduced through the feed pipe 5 and then guided to the dispersing mechanism through the feed pipe 5.

[0067] Step 2: Then, the gas is discharged by multi-point synchronous gravity dripping and settling of the introduced emulsion through the dispersing mechanism, and at the same time, the gas precipitated in the tower body 1 is extracted by the dispersing mechanism.

[0068] Step 3: At the same time, the dripping emulsion comes into contact with the corresponding dispersing mechanism. The dispersing mechanism continuously disperses the emulsion. During the process of the emulsion being dispersed and thrown out by the dispersing mechanism, VOCs gas is removed. At the same time, the emulsion collides with the inner wall of tower 1 during the throwing process. During the collision with tower 1, the VOCs in the emulsion are forced to be released quickly, which improves the overall removal efficiency.

[0069] Step 4: With the assistance of the dripping mechanism, the emulsion after impact enters the dripping mechanism to be intercepted. Then, the VOCs gas is subjected to multi-point gravity sedimentation again through the dripping mechanism. The emulsion then drips from the dripping mechanism to the bottom of the tower 1 to complete the removal of VOCs.

[0070] Step 5: Simultaneously, the dripping mechanism can clean itself and the inner wall of tower 1 at the same time. During the cleaning process, it can also agitate the emulsion to prevent it from accumulating and clogging, ensuring the stable flow of the emulsion and promoting the re-release of VOCs gas inside the emulsion, thereby increasing the collection and dripping speed.

[0071] This invention provides an apparatus and removal process for reducing VOCs content in styrene-acrylic emulsion. The specific working principle is as follows: First, the emulsion is introduced through the feed pipe 5 and guided to the dispersing mechanism. Then, the dispersing mechanism completes the multi-point synchronous gravity dripping and settling of the introduced emulsion to discharge gas. At the same time, the dripping emulsion comes into contact with the corresponding dispersing part, and the dispersing part continuously disperses the emulsion. During the process of the emulsion being dispersed and thrown out by the dispersing mechanism, VOCs gas is removed. At the same time, the emulsion collides with the inner wall of the tower body 1 during the throwing process. During the collision with the tower body 1, the VOCs in the emulsion are forced to be released rapidly, which improves the overall removal efficiency. It can complete the removal of the emulsion in multiple ways simultaneously within the tower body 1, which improves the removal accuracy and removal efficiency.

[0072] Simultaneously, with the assistance of the dripping mechanism, the emulsion after impact enters the dripping mechanism for interception. Then, the VOCs gas undergoes multi-point gravity sedimentation again through the dripping mechanism. The emulsion then drips from the dripping mechanism to the bottom of the tower 1 to complete the removal of VOCs. At the same time, the dripping mechanism can simultaneously clean itself and the inner wall of the tower 1. During the cleaning process, it also agitates the emulsion to prevent it from accumulating and clogging, ensuring stable flow of the emulsion and promoting the re-release of VOCs gas inside the emulsion, thereby improving the collection and dripping speed.

[0073] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An apparatus for reducing VOCs content in styrene-acrylic emulsion, comprising a tower body (1) with an open top design, a tower cover (2) installed on the top of the tower body (1), a pressure gauge (3) connected to the inside of the tower body (1) and connected to one side of the top of the tower cover (2), and a discharge pipe (4) connected to one side of the bottom of the tower body (1), characterized in that: A feed pipe (5) is connected to one side of the top of the tower cover (2). A dispersing mechanism is installed at the top inside the tower body (1). The feed pipe (5) is connected to the dispersing mechanism. The dispersing mechanism is used to introduce the emulsion and complete multi-point discharge and dispersing, and to impact the inner wall of the tower body (1). The gas is removed through the dispersing mechanism. A dripping mechanism is installed below the dispersing mechanism inside the tower body (1). The dripping mechanism is set in cooperation with the dispersing mechanism. The dripping mechanism is used to collect the emulsion after it is dispersed and removed by the dispersing mechanism and complete the multi-point dripping action. A driving mechanism is installed from the top of the tower cover (2) into the tower body (1). The driving mechanism is connected to the dispersing mechanism and the dripping mechanism respectively to complete the linkage. The drive mechanism includes a drive motor (6) mounted on the top center of the tower cover (2) via a bracket. A power shaft (7) is installed at the output end of the drive motor (6). The power shaft (7) extends into the tower body (1) and is connected to the dispersing mechanism and the dripping mechanism. Two sets of stirring blades (8) are fixedly sleeved on the bottom of the power shaft (7) below the dripping mechanism. The dispersing mechanism includes an annular cavity (9) installed at the top of the tower body (1) by a bracket, and the annular cavity (9) is connected to the feed pipe (5). Multiple nozzles (10) are arranged in a circular array at the bottom of the annular cavity (9). Each nozzle (11) can be detachably connected to the bottom of the multiple nozzles (10). Multiple dispersing parts are arranged in a circular array at the bottom of the annular cavity (9). Multiple dispersing parts are distributed on one side of multiple nozzles (10). The emulsion is dispersed at multiple points and thrown out by multiple dispersing parts. A fixed frame (12) is installed concentrically above the annular cavity (9). The fixed frame (12) is detachably fixed to the outside of the power shaft (7). An external gear ring (13) is installed concentrically at the bottom of the fixed frame (12). An exhaust pipe (14) is connected to one side of the top of the tower cover (2). A vacuum pump (15) is installed at the bottom of one side of the tower body (1) through a bracket. The bottom of the exhaust pipe (14) is connected to the input end of the vacuum pump (15). A vent pipe (16) is connected to the output end of the vacuum pump (15). Each of the multiple dispersing parts includes a rotating shaft (17) that rotatably passes through the annular cavity (9). An external thread area (18) is provided at the bottom of the outer surface of the rotating shaft (17). A threaded sleeve (19) is screwed onto the external thread area (18) outside the rotating shaft (17). A dispersing disc (20) is concentrically fitted at the bottom of the threaded sleeve (19). Multiple dispersing plates (21) are arranged in a circular array on the upper surface of the dispersing disc (20). The dispersing disc (20) is correspondingly arranged with the nozzle (11). A gear (22) is fixedly fitted on the top of the rotating shaft (17). The gear (22) meshes with the external gear ring (13) for transmission. Three open-topped constraint frames (24) are arranged in a circular array at the bottom of the dispersing plate (20). A sealing cover (25) is detachably installed at the open top of the constraint frame (24) by bolts. A counterweight (26) is slidably installed at the bottom inside the constraint frame (24). A return spring (27) is provided between the front end of the counterweight (26) and the constraint frame (24). A fixing plate (28) is installed on the top side of the inner wall of the constraint frame (24) away from the counterweight (26). A swing arm (29) is rotatably mounted on a fixed plate (28) via a pin. A first linkage arm (30) and a second linkage arm (31) are respectively hinged at both ends of the swing arm (29). A push rod (32) is mounted on one side of the upper surface of the counterweight (26). The front end of the push rod (32) is hinged to the tail end of the first linkage arm (30). A pressure rod (33) is slidably installed through the front end of the limiting frame (24). The tail end of the pressure rod (33) is hinged to the tail end of the second linkage arm (31). An arc-shaped pressure plate (34) is installed at the front end of the pressure rod (33). The contact restriction with the rotating shaft (17) is achieved by the arc-shaped pressure plate (34) on the three limiting frames (24), while the counterweight (26) is moved under the drive of centrifugal force to provide continuous thrust to the pressure rod (33) and the arc-shaped pressure plate (34) to maintain stability.

2. The device for reducing VOCs content in styrene-acrylic emulsion according to claim 1, characterized in that: The dripping mechanism includes an annular component (35) installed inside the tower body (1). An annular plate (36) is integrally provided at the bottom edge of the outer wall of the annular component (35). Multiple dripping holes (37) are evenly distributed on the annular plate (36). The annular plate (36) is detachably fixed to the inner wall of the tower body (1). A conical filter cylinder (38) is concentrically installed on the top of the annular component (35). The conical filter cylinder (38) is rotatably connected to the power shaft (7). A fixing ring (39) is sleeved on the outside of the power shaft (7). Three scrapers (40) are arranged in a circular array on the side wall of the fixing ring (39). All three scrapers (40) are in scraping contact with the outside of the conical filter cylinder (38).

3. The device for reducing VOCs content in styrene-acrylic emulsion according to claim 2, characterized in that: The annular plate (36) and the tower body (1) form an annular space (41). Three scraper blocks (42) are arranged in a circular array in the annular space (41), and the three scraper blocks (42) are fixedly connected to the three scraper blades (40) to complete the linkage.

4. The device for reducing VOCs content in styrene-acrylic emulsion according to claim 2, characterized in that: A connecting ring (43) is fixedly sleeved above the fixing ring (39) outside the power shaft (7). Three mounting brackets (44) are arranged in a circular array around the outer wall of the connecting ring (43). A cleaning plate (45) is installed at the tail of each of the three mounting brackets (44). The cleaning plate (45) contacts the inner wall of the tower body (1) to clean the tower body (1).

5. The device for reducing VOCs content in styrene-acrylic emulsion according to claim 2, characterized in that: Two flow guide zones (46) are symmetrically opened on both sides of the conical filter cartridge (38).

6. A process for removing VOCs from a device used to reduce the VOCs content in styrene-acrylic emulsion, characterized in that: The equipment used to reduce the VOCs content in styrene-acrylic emulsion according to any one of claims 1-5, the removal process specifically includes the following steps: Step 1: First, the emulsion is introduced through the feed pipe (5) and then guided to the dispersing mechanism through the feed pipe (5); Step 2: Then, the gas is discharged by multi-point synchronous gravity dripping and settling of the introduced emulsion through the dispersing mechanism, and the gas precipitated in the tower body (1) is extracted by the dispersing mechanism. Step 3: At the same time, the dripping emulsion comes into contact with the corresponding dispersing mechanism. The emulsion is continuously dispersed by the dispersing mechanism. The VOCs gas is removed during the process of the emulsion being dispersed and thrown out by the dispersing mechanism. At the same time, the emulsion collides with the inner wall of the tower body (1) during the process of being thrown out. During the collision with the tower body (1), the VOCs in the emulsion are forced to be released quickly, which improves the overall removal efficiency. Step 4: With the assistance of the dripping mechanism, the emulsion after impact enters the dripping mechanism to intercept the emulsion. Then, the VOCs gas is subjected to multi-point gravity sedimentation again through the dripping mechanism. The emulsion drips from the dripping mechanism to the bottom of the tower (1) to complete the removal of VOCs. Step 5: At the same time, the dripping mechanism can complete the synchronous cleaning of itself and the inner wall of the tower (1). During the cleaning process, it can also move the emulsion to avoid the accumulation and blockage of the emulsion, ensure the stable flow of the emulsion, and promote the release of VOCs gas inside the emulsion, thereby increasing the collection and dripping speed.

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