Method and equipment for spray granulation of a heterocyclic material

Abstract

This invention discloses a method and equipment for spray extraction and granulation of heterocyclic materials, relating to the field of polymer material preparation technology. The method involves feeding a two-component mixed molten slurry into a high-speed centrifugal atomizer for centrifugal atomization, forming uniform fine droplets. Under an inert atmosphere, these fine droplets undergo spray extraction through a ring-shaped spray device, resulting in an extraction reaction that modifies and shapes the material into particles. The particles fall and collect before being discharged from the outlet, yielding heterocyclic material particles. The equipment includes a slurry feed pipe, a high-speed centrifugal atomizer, a ring-shaped spray device, an extraction tank, a filter assembly, an outlet, and an external recovery system. The filter assembly is preferably a combination of a conical filter and a ring-shaped bubble generator, which reduces clogging through bubble impact vibration. This invention achieves continuous preparation of heterocyclic material particles through the synergistic effect of spray extraction and centrifugal atomization. The process is simple, efficient, and the equipment operates stably, making it suitable for industrial production.

Description

Technical Field

[0001] This invention relates to the field of polymer material preparation technology, and more specifically, to a method and equipment for spray extraction and granulation of heterocyclic materials. Background Technology

[0002] Heterocyclic polymer engineering plastics, as a cutting-edge new polymer material attracting much attention, are seeing continuous advancements in production technology and processes, which are driving the development of this field. In existing production processes, spray granulation equipment is commonly used for molding; however, the poor spraying effect of this equipment has become a key bottleneck restricting product quality and production capacity. To achieve higher production capacity, the number of slurry nozzles is typically set to four, resulting in a total of 61×4 nozzles. This leads to a large number of extruded slurry strips, causing insufficient spacing between them as they fall into the extraction liquid. After the slurry strips fall into the extraction liquid, the rotation of the agitator shaft causes some strips to easily adhere together, forming lumpy precipitates, while unadhesive strips precipitate as strip-shaped lumps in the extraction liquid. These strip-shaped and lumpy agglomerates not only clog the feed pipe of the agglomeration tank but also frequently cause blockages at the feed inlet of the subsequent pulverizer, sometimes even leading to decreased production efficiency or production interruption.

[0003] While adjusting process parameters and reducing slurry feed can improve the molding effect to some extent, it cannot fundamentally prevent the formation of strip-shaped or blocky agglomerates. To address the issue of uneven precipitate morphology, existing processes attempt to use jaw crushing combined with grinding and emulsification to pulverize and refine the strip-shaped or blocky agglomerates. However, this method has revealed new technical drawbacks in practical applications: on the one hand, during the grinding and refining process, the long molecular chains of polymer materials are prone to breakage, leading to material modification and thus reducing or altering their expected properties, especially when pursuing ultrafine grinding, this negative impact is more pronounced; on the other hand, larger pieces of material still contain solvent inside, which cannot be fully contacted and precipitated by the extractant, forming a "hard outside, soft inside" structure, requiring subsequent washing processes for re-extraction, which not only significantly increases the number of washing cycles but also increases the burden of solvent recovery and treatment, ultimately reducing production efficiency and process economy.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a method and equipment for spray extraction granulation of heterocyclic materials, which can achieve uniform and fine spray granulation without grinding, facilitating subsequent process transportation and washing, and solving the current problems of poor spray forming, easy material modification or performance reduction, and inability to achieve large-scale continuous production.

[0006] This invention is implemented as follows: In a first aspect, the present invention provides a method for spray extraction and granulation of heterocyclic materials, comprising the following steps: feeding a two-component mixed molten slurry into a high-speed centrifugal atomizing device for centrifugal atomization to form uniform fine droplets; under an inert atmosphere, the fine droplets are sprayed and extracted through a ring-shaped spraying device, causing the droplets to undergo an extraction reaction and be modified and shaped to form material particles; the material particles fall and collect, and are then screened and filtered, and stably discharged from the outlet to obtain heterocyclic material particles.

[0007] In an optional embodiment, the two-component mixed molten material comprises a heterocyclic material and a solvent, wherein the solid-liquid ratio of the heterocyclic material and the solvent is 1:(4-5), and the temperature of the two-component mixed molten material is 140-160°C.

[0008] In an optional embodiment, the heterocyclic material is a naphthalene-biphenyl polyaryletherketone resin with a molecular weight of 15,000-20,000 and a viscosity of 3,000-11,000 cP.

[0009] In an optional embodiment, the liquid curtain thickness of the annular spray device is ≥500mm, and the volume ratio of the sprayed slurry to the extract is >1:100.

[0010] In an optional embodiment, the extractant of the spraying device is water, and the temperature of the extractant is 15-30°C.

[0011] In an optional embodiment, the heterocyclic material particles are nearly spherical with a particle size of 0.5-2.0 mm.

[0012] Secondly, the present invention provides an apparatus for the above-mentioned spray extraction granulation method, the apparatus comprising: a slurry feed pipe 6; A high-speed centrifugal atomizing device is connected to the slurry feed pipe 6; A ring-shaped spray device is installed below the high-speed centrifugal atomizing device; Extraction tank 5, the high-speed centrifugal atomizing device is fixed to the cover plate of the extraction tank 5; A filter assembly is disposed inside the extraction tank 5 and located below the annular spray device; The discharge port 10 is located at the bottom of the extraction tank 5; and the external recovery system is connected to the gas phase outlet of the extraction tank 5.

[0013] In an optional embodiment, the filtration assembly includes a conical filter 7 and a bubble generator 9 disposed below the conical filter 7; the conical filter 7 is arranged in an upright conical shape with a pore size of [missing information]. 5~ 10; The bubble generator 9 is annular and is used to generate bubble impact vibrations in the conical filter 7 to reduce clogging.

[0014] In an optional embodiment, the external recovery system is at least one of a Roots blower 21, an absorption tower 23, and a Venturi mixer 24, used to extract and process gaseous substances in the extraction tank 5.

[0015] In an optional embodiment, the device is further provided with a liquid level control system; the liquid level control system includes a high liquid level interlock device and an overflow pipe 8, the high liquid level interlock device is located on the cylinder of the extraction tank 5 and is lower than the high-speed centrifugal atomizing device; the overflow pipe 8 is provided in the extraction tank 5 and the upper port is set at the normal operating liquid level to control the liquid level stability.

[0016] The present invention has the following beneficial effects: This invention achieves one-step continuous granulation through the synergistic effect of high-speed centrifugal atomization and annular spray extraction, fundamentally avoiding the problem of slurry strips sticking together and forming lumpy agglomerates as in traditional multi-nozzle extrusion methods. No subsequent crushing or grinding is required, preventing the breakage of polymer chain molecules and fully preserving the material's intended properties. Simultaneously, spray extraction ensures uniform droplet dispersion and rapid solvent removal, resulting in uniform precipitation inside and outside the particles, eliminating the "hard outside, soft inside" defect and significantly reducing the number of washing cycles and solvent recovery burden. The accompanying equipment uses a filter component with self-cleaning function, ensuring stable and reliable operation. This invention has significant advantages such as simple process, uniform particle size, good material performance preservation, high production efficiency, and suitability for large-scale industrial production. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional schematic diagram of the first spray extraction granulator provided by the present invention; Figure 2 A three-dimensional schematic diagram of the second type of spray extraction granulator provided by the present invention; Figure 3 A three-dimensional schematic diagram of the third type of spray extraction granulator provided by the present invention; Figure 4 This is a three-dimensional schematic diagram of the spray extraction granulator of Comparative Example 1 of the present invention.

[0019] Icons: 1-High-speed centrifugal atomizer; 2-Atomizer base; 3-Spray tank; 4-High liquid level alarm interface; 5-Extraction tank; 6-Slurry feed pipe; 7-Conical filter; 8-Overflow pipe; 9-Bubble generator; 10-Discharge port; 21-Roots blower; 22-Axial flow fan; 23-Absorption tower; 24-Venturi mixer; N2-Extractant inlet; N3-Discharge port pipe; N4-Volatile gas outlet; N5-Volatile gas reflux port; N6-Overflow port; N7-High liquid level alarm interface pipe; A1-Slurry feed interface; A2-Discharge pipe; A3-Extractant inlet; A4-Volatile gas outlet pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0021] In existing technologies, due to capacity requirements, the number of nozzles and the size of the nozzles in the slurry are large, resulting in an increased number of extruded slurry strips with small spacing between them. This causes some slurry strips to clump together to form lumpy precipitates after being stirred in the extraction liquid, while others precipitate into strip-like lumps. These strip-like and lumpy agglomerates clog the feed pipe and the feed inlet of the subsequent crusher, leading to reduced production efficiency or even interruption. Even if the strip-like or lumpy agglomerates are crushed and refined, the problem of material modification due to molecular chain breakage during the grinding process still exists. Furthermore, the solvent encapsulated within larger lumps cannot be extracted, resulting in lumps that are hard on the outside and soft on the inside. This necessitates re-extraction during subsequent washing after crushing, increasing washing frequency and solvent handling volume, further reducing production efficiency.

[0022] It should be noted that even if a high-performance pulverizer can achieve the desired particle size, the molecular chains of polymer materials are relatively long, and the molecular chains are prone to breakage during high-performance pulverization, which can change or reduce the material properties, especially in ultrafine pulverization.

[0023] Based on this, this application proposes a method for spray extraction granulation of heterocyclic materials, comprising the following steps: S1. The two-component mixed molten slurry is fed into a high-speed centrifugal atomizing device for centrifugal atomization to form uniform fine droplets; S2. Under an inert atmosphere, the fine droplets are sprayed and extracted by a ring spray device, causing the droplets to undergo an extraction reaction and be modified and shaped into material particles. S3. The material particles fall and collect, then are screened and filtered, and stably discharged from the outlet to obtain heterocyclic material particles.

[0024] The method of this application is based on refining a two-component molten slurry (B+C) into fine droplets, which enter the extract (A). The two-component molten slurry (B+C) and the extract (A) undergo a physical extraction process. This physical extraction process utilizes the property that the solvent (B) in the extract (A) and the slurry (B+C) is completely miscible. The extract (A) absorbs the solvent (B) component in the droplets, while the solute (C) in the slurry is incompatible with the extract (A). In this way, the solute component in the slurry is separated, realizing the extraction granulation process.

[0025] The temperature of the two-component mixed molten material is 140-160℃. The two components of the two-component molten slurry are a heterocyclic material and a solvent, respectively. The heterocyclic material is selected from poly(aryletherketone) resins of naphthalene-biphenyl (PPEK), with a molecular weight controlled between 15,000 and 20,000. At this melting temperature, the viscosity of PPEK is 3,000-11,000 cP. The solvent used is a conventional variety that can dissolve PPEK and is miscible with the extractant. Low-toxicity solvents are preferred to meet the overall process safety and extraction separation requirements. Furthermore, the solid-liquid ratio in the two-component mixed molten slurry is 1:(4-5), which can be 1:4, 1:4.2, 1:4.4, 1:4.6, 1:4.8, or 1:5, etc., preferably 1:4.

[0026] Specifically, a two-component molten slurry is delivered to a high-speed centrifugal atomizer 1 via an external delivery pipeline. The slurry is dispersed into fine droplets by the high-speed centrifugal atomizer 1's atomizing disc, which rotates at high speed. The droplets are then injected circumferentially into an annular liquid curtain of extractant formed by spraying from the spray tank 3. The droplets fall into the extraction tank 5 with the extractant and undergo a rapid physical extraction process in the extractant during the fall. That is, the solvent component in the two-component slurry is extracted by the extractant, and the solute component is analyzed, cooled, and solidified to form a polymer solid granulation.

[0027] To prevent the molten material from sticking together in contact with the wall of the extraction tank 5 before solidification, the liquid curtain of the extractant needs to have a certain thickness so that it is intercepted before reaching the cylinder wall. It also needs to have a certain height so that the solvent on the surface of the slurry is absorbed by the extractant during its fall into the solution of the extraction tank 5, and the remaining solute surface is initially hardened and not easy to stick. After entering the extraction tank 5, it is deeply extracted. Therefore, in some preferred embodiments, the liquid curtain thickness of the annular spray device is ≥500mm, and the volume ratio of the sprayed slurry to the extractant is >1:100.

[0028] In some preferred embodiments, the extractant of the spraying device is water, and the temperature of the extractant is 15-30°C. It should be noted that the water selected in this application is purified water, preferably deionized water, to avoid impurities from adversely affecting the extraction granulation process and product quality.

[0029] In some preferred embodiments, the heterocyclic material particles are nearly spherical with a particle size of 0.5-2.0 mm, which can be 0.5 mm, 1.0 mm, 1.5 mm or 2.0 mm, etc.

[0030] Secondly, the present invention provides an apparatus for the above-mentioned spray extraction granulation method, the apparatus comprising: a slurry feed pipe 6; A high-speed centrifugal atomizing device, connected to the slurry feed pipe 6, includes a high-speed centrifugal atomizer 1 and an atomizer base 2, used to disperse the two-component molten slurry into fine droplets; It is easy to understand that the slurry feed pipe 6 is connected to the high-speed centrifugal atomizing device, so that the two-component molten slurry enters the high-speed centrifugal atomizing device through the feed pipe, and is dispersed into fine droplets by high-speed rotation, and injected into the annular extract liquid curtain formed by the spray tank 3 around it.

[0031] It should be noted that the high-speed centrifugal atomizer 1 can be any commercially available model in the field, as long as it can atomize the molten slurry into fine droplets under high-speed centrifugal force. This application does not impose any special limitations on its specific model or internal structure. Furthermore, the high-speed centrifugal atomizer 1 needs to be selected according to the molten components, and the atomizer manufacturer needs to conduct tests and finalize the design to ensure that the slurry is atomized into fine droplets after high-speed rotation. If it is in the form of filaments, it will not meet the requirements.

[0032] An annular spray device is located below the high-speed centrifugal atomizing device to form a dense liquid curtain around the extraction tank 5 with the extractant. Extraction tank 5, the high-speed centrifugal atomizing device is fixed to the cover plate of the extraction tank 5; A filter assembly is disposed inside the extraction tank 5 and located below the annular spray device; The discharge port 10 is located at the bottom of the extraction tank 5; and the external recovery system is connected to the gas phase outlet of the extraction tank 5.

[0033] In some preferred embodiments, the filtration assembly includes a conical filter 7 and a bubble generator 9 disposed below the conical filter 7; the conical filter 7 is disposed in the extraction tank 5 and arranged in an upright conical shape, with a pore size of [missing information]. 5~ 10 is used to intercept large particles or lumps of material formed under fault conditions, or detached equipment parts; the bubble generator 9 is annular and is supplied with compressed gas by an external volatile gas recovery system; when the gas passes through the bubble generator 9, bubbles are generated, which on the one hand increases the vibration of the liquid in the extraction tank 5, and on the other hand accelerates the disturbance of the liquid in the extraction tank 5, thereby improving the pass rate of the material in the cone filter 7 and avoiding blockage.

[0034] In some preferred embodiments, the external recovery system is at least one of a Roots blower 21, an absorption tower 23, and a Venturi mixer 24, used to extract and process gaseous substances in the extraction tank 5.

[0035] When selecting the Roots blower 21, such as Figure 1 As shown, the Roots blower 21 extracts and compresses the volatile gases in the upper gas phase space of the extraction tank 5 and sends them back to the extraction tank 5 for absorption. It also serves as the power source for the bubble generator 9, realizing the rational application of volatile gas recovery. In the event of a failure of the Roots blower 21, the gases are sent to the tail gas recovery system for processing. The volatile gas inlet pipe can also be used as an inert gas inlet pipe to prevent the accumulation of flammable and explosive media in the extraction tank 5 and the formation of an explosive environment with oxidizing media.

[0036] When absorption tower 23 is selected, such as Figure 2 As shown, the absorption tower 23 is equipped with an absorbent, preferably an extractant; the volatile gases generated during the atomization process are drawn out from the volatile gas outlet N4, sent into the absorption tower 23 for absorption via the volatile gas recovery pipeline and the axial flow fan 22, and introduced by the branch line of the extractant inlet pipeline. After being absorbed by the extractant, the volatile gases are returned to the extraction tank 5 from the volatile gas return port N5.

[0037] When using Venturi mixer 24, such as Figure 3 As shown, the volatile gases generated during atomization are drawn out from the volatile gas outlet N4, and then drawn out and mixed into the injection liquid by the volatile gas recovery pipeline and the venturi mixer 24. The injection liquid is an extractant, which is introduced by the branch line of the extractant inlet pipeline. After being absorbed by the extractant, the volatile gases are returned to the extraction tank 5 from the volatile gas return port N5.

[0038] In some preferred embodiments, the device is further equipped with a liquid level control system; the liquid level control system includes a high liquid level interlock device and an overflow pipe 8, which serves two purposes: firstly, to stabilize the liquid level in the extraction tank 5, and secondly, to prevent high liquid levels from affecting the spraying effect; in actual operation, a certain amount of extract liquid is maintained out of the overflow pipe 8 for a long time. If no liquid is detected to be discharged, the amount of extract liquid added is increased. If the liquid flow rate of the overflow pipe 8 suddenly decreases, the possibility of blockage at the inlet of the overflow pipe 8 should be considered; if the liquid level reaches the high limit, the amount of extract liquid added should be reduced and spraying should be stopped. Spraying should be resumed after the liquid level returns to normal. The high liquid level interlock device is located on the cylinder of the extraction tank 5 and is lower than the high-speed centrifugal atomizing device. When the liquid level in the extraction tank 5 is higher than the interface, the interlock action stops the addition of slurry to avoid the atomizing disc from contacting the extraction liquid, which could cause the atomizing disc holes to become blocked, affect the atomization effect, or even cause safety risks.

[0039] Furthermore, the overflow pipe 8 is installed in the extraction tank 5, and the upper port is positioned at the normal operating liquid level; when the liquid level in the extraction tank 5 exceeds this position, the excess extract is discharged from the lower port to control the liquid level stability.

[0040] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0041] Example 1 This embodiment provides a method for spray extraction and granulation of heterocyclic materials, including the following steps: S1. The heterocyclic material selected is PPEK-10 with a molecular weight of 20,000. PPEK resin and solvent are mixed at a solid-liquid ratio of 1:4 to prepare a two-component mixed melt slurry. S2. The above-mentioned molten slurry is fed into the high-speed centrifugal atomizing device through the slurry feed pipe 6. The rotation speed is adjusted to atomize the slurry into uniform fine droplets. S3. Under the protection of nitrogen inert atmosphere, the fine droplets are introduced into the extraction tank 5 through the annular spray device; the extraction tank 5 is filled with room temperature deionized water, the thickness of the liquid curtain formed by the annular spray device is controlled at 500 mm, and the volume ratio of the sprayed slurry to the extraction liquid is controlled at 1:100. The fine droplets undergo a physical extraction process in the extraction liquid, the solvent and water are miscible and gradually diffuse out of the droplets to form material particles. S4. The material particles fall and collect under the action of gravity, falling into the cone filter 7. After screening and filtration, they are stably discharged from the outlet 10, producing heterocyclic material particles.

[0042] The PPEK particles prepared in this embodiment are nearly spherical, round, or circular, with a particle size concentrated in the range of 0.5–2.0 mm. Cross-sectional observation of the particles shows a uniform internal and surface structure, without the "hard outside, soft inside" core-shell structure defect. No crushing or grinding treatment is required after sieving; the polymer molecular chains in the particles remain intact, and the thermal stability and mechanical properties of the material show no significant decrease compared to the raw material. Example 2 This embodiment provides a method for spray extraction and granulation of heterocyclic materials. The steps are the same as those in Example 1, except that the heterocyclic material used is PPEK-20 with a molecular weight of 15,000. The PPEK-20 particles prepared in this embodiment are basically the same as those in Example 1 in terms of morphology, particle size, internal uniformity and molecular chain integrity. They are also nearly spherical (0.5–2.0 mm), without the "hard outside and soft inside" defect, do not require crushing treatment and have stable material properties.

[0043] Comparative Example 1 This comparative example provides a method for spray extraction granulation of heterocyclic materials, such as... Figure 4 As shown, the steps include: S1. PPEK, a heterocyclic material with a molecular weight of 20,000; PPEK resin and solvent are mixed at a solid-liquid ratio of 1:4 to prepare a two-component mixed melt slurry. S2. The above-mentioned molten slurry is fed into the nozzle with a total of 61×4 nozzles through the slurry feed interface A1. Under the action of system pressure, it is squeezed out of the nozzle and falls into the extract liquid in strip shape.

[0044] S3. Under the protection of nitrogen inert atmosphere, the fine strip material enters the extraction tank 5. Before the slurry solidifies, it is dispersed into fine slurry droplets by the action of the stirring paddle. The extract (water) gradually diffuses the solvent in the slurry out of the slurry, leaving solid particulate material. S4. Under the action of gravity, the material particles are sent from the discharge pipe A2 into the subsequent equipment to crush the larger particles and obtain heterocyclic material particles.

[0045] The PPEK particles prepared in this comparative example need to be pulverized to obtain uniform, fine particles. Before pulverization, the particle size and shape are very uneven, mostly in the form of strips and lumps, exhibiting a "hard on the outside and soft on the inside" defect. During subsequent crushing or grinding, the material's molecular chains may undergo chain breakage modification, leading to unstable material properties. Furthermore, these strip-shaped and lumpy agglomerates easily clog the discharge port or cause blockages in subsequent pulverizers, which can severely reduce production efficiency or even cause production interruptions.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for spray extraction and granulation of heterocyclic materials, characterized in that, Includes the following steps: The two-component mixed molten slurry is fed into a high-speed centrifugal atomizing device for centrifugal atomization to form uniform fine droplets; Under an inert atmosphere, the fine droplets are sprayed and extracted by a ring spray device, causing the droplets to undergo an extraction reaction and be modified and shaped into material particles; the material particles fall and collect, and are then screened and filtered, and stably discharged from the outlet to obtain heterocyclic material particles.

2. The method for spray extraction and granulation of heterocyclic materials according to claim 1, characterized in that, The two-component mixed molten material comprises a heterocyclic material and a solvent, wherein the solid-liquid ratio of the heterocyclic material and the solvent is 1:(4-5), and the temperature of the two-component mixed molten material is 140-160℃.

3. The method for spray extraction and granulation of heterocyclic materials according to claim 2, characterized in that, The heterocyclic material is a polyarylether ketone resin with a molecular weight of 15,000-20,000 and a viscosity of 3,000-11,000 cP.

4. The method for spray extraction and granulation of heterocyclic materials according to claim 1, characterized in that, The thickness of the liquid curtain of the annular spray device is ≥500mm, and the volume ratio of the sprayed slurry to the extract is >1:

100.

5. The method for spray extraction and granulation of heterocyclic materials according to claim 1, characterized in that, The extractant of the spraying device is water, and the temperature of the extractant is 15-30℃.

6. The method for spray extraction and granulation of heterocyclic materials according to claim 1, characterized in that, The heterocyclic material particles are nearly spherical with a particle size of 0.5-2.0 mm.

7. An apparatus for use in the method of any one of claims 1-6, characterized in that, The equipment includes: a slurry feed pipe (6); A high-speed centrifugal atomizing device is connected to the slurry feed pipe (6); A ring-shaped spray device is installed below the high-speed centrifugal atomizing device; Extraction tank (5), the high-speed centrifugal atomizing device is fixed on the cover plate of the extraction tank (5); The filter assembly is disposed inside the extraction tank (5) and located below the annular spray device; The discharge port (10) is located at the bottom of the extraction tank (5); and the external recovery system is connected to the gas phase outlet of the extraction tank (5).

8. The device according to claim 7, characterized in that, The filtration assembly includes a conical filter (7) and a bubble generator (9) disposed below the conical filter (7); the conical filter (7) is arranged in an upright conical shape with a pore size of [missing information]. 5~ 10; The bubble generator (9) is annular and is used to generate bubble impact vibrations in the conical filter (7) to reduce clogging.

9. The device according to claim 7, characterized in that, The external recovery system is at least one of a Roots blower (21), an absorption tower (23), and a Venturi mixer (24), used to extract and process gaseous substances in the extraction tank (5).

10. The device according to claim 7, characterized in that, The device is also equipped with a liquid level control system, which includes a high liquid level interlock device and an overflow pipe (8); the high liquid level interlock device is located on the cylinder of the extraction tank (5) and is lower than the high-speed centrifugal atomizing device; the overflow pipe (8) is located in the extraction tank (5) and its upper port is located at the normal operating liquid level to control the liquid level stability.

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