A micro powder recovery system for powder coating production
By combining a cyclone separator and a bag filter system, the problem of unclassified micro-powder recovery in powder coating production has been solved, achieving efficient graded recovery and reducing dust concentration, thereby improving material utilization and reducing recycling costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI YISAN POLYMER MATERIAL CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-21
AI Technical Summary
In existing powder coating production, the micro powder recovery system does not perform coarse and fine classification, resulting in the mixing of powders of different particle sizes, excessive dust concentration in exhaust gas, and increased recovery costs.
A combined system of cyclone separator and bag filter is adopted. Coarse and fine powders are separated by cyclone separation and bag filtration. Pulse jet technology is used to remove powder cake from the filter bag, and coarse and fine powders are collected separately. The operation is optimized by a PLC controller.
It achieves efficient graded recycling of micro powder, reduces dust concentration in exhaust gas, reduces environmental pollution and health risks, lowers recycling costs, and improves material utilization.
Smart Images
Figure CN224524355U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of powder coating production technology, specifically to a micro powder recovery system for powder coating production. Background Technology
[0002] During the production of powder coatings, multiple stages such as feeding, mixing, extrusion, cooling and pressing, crushing, and sieving generate a large amount of fine powder suspended in the air. If this powder is discharged directly without treatment, it not only wastes the raw materials for powder coatings but may also accumulate in the workshop, affecting the production environment and worker health. Therefore, dust recovery devices are typically installed on production lines to collect and reuse the emitted powder.
[0003] Currently, common methods for recovering fine powder all employ a single, one-time recovery system: when using only cyclone separation, fine powder is difficult to capture effectively, and some will be directly discharged with the airflow, resulting in excessive dust concentration in the exhaust gas; when using only a filtration system, a large amount of coarse powder enters the filter components, which will accelerate the clogging and wear of the filter components, increase the frequency of dust removal and maintenance costs; the recovered powder is not classified into coarse and fine grades, and powders of different particle sizes are mixed and directly returned to production, resulting in unnecessary increases in recovery costs.
[0004] Therefore, a micro powder recovery system for powder coating production is needed. Utility Model Content
[0005] The purpose of this invention is to provide a micro powder recovery system for powder coating production, in order to solve the problems mentioned in the background art, such as the inability to classify powders after one-time recovery, the direct return of powders of different particle sizes to production after mixing, the excessive dust concentration in the exhaust gas, and the increased cost of unnecessary recovery.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a micro-powder recovery system for powder coating production, comprising a recovery tower and a bag filter. A cyclone separator is installed on the left side of the outside of the recovery tower. A powder inlet is located on the top right side of the cyclone separator, and an air outlet is located on the top left side. A bag filter is fixedly connected inside the recovery tower. A powder-containing waste gas inlet is installed on the lower left side of the bag filter, extending to the outside of the recovery tower. A bag holder is fixedly installed inside the bag filter. Multiple sets of filter bags are evenly fixed at the frame. The top of the recovery tower is a purification chamber, and the top of the purification chamber is connected to an air outlet pipe. A material pump is installed on the left side of the air outlet pipe. The output pipe of the material pump extends to the outside of the recovery tower and is connected to the powder inlet. A powder hopper is provided at the bottom of the cyclone separator. A fine powder recovery pump is connected to the bottom of the powder hopper. The output of the fine powder recovery pump is connected to a fine powder storage tank. A powder box is installed at the bottom of the bag filter. A coarse powder recovery pump is connected to the right side of the powder box. The output of the coarse powder recovery pump is connected to a coarse powder storage tank.
[0007] As a further technical solution of this utility model, the bag recycling device is a vertical structure with clean material on top and ash material on the bottom. The bag fixing frame is assembled and disassembled by bolts, and the filter bag material is anti-static needle-punched felt.
[0008] As a further technical solution of this utility model, a blowpipe is installed above the inside of the recycling tower, the blowpipe nozzle is aligned with the top of the filter bag, a pulse valve is installed on the left side of the outer wall of the bag collector, a solenoid valve is installed at the pulse valve, an air tank is installed at the input end of the pulse valve, and the output end of the pulse valve is connected to the blowpipe.
[0009] As a further technical solution of this utility model, the top end of the gas outlet pipe extends to the top of the recovery tower and is fitted with a sealing cap.
[0010] As a further technical solution of this utility model, a viewing window is installed at the front end of the recycling tower, and a PLC controller is arranged on the left side of the viewing window.
[0011] As a further technical solution of this utility model, an inspection door is provided at the bottom of the front end of the recycling tower.
[0012] Compared with the prior art, the beneficial effects of this utility model are: to realize the secondary treatment of gas, improve the comprehensive recovery rate of micro powder, reduce the powder content in the emission gas, reduce the impact on the environment and workers, and make the recovered waste gas more thoroughly treated, avoiding the pollution of the environment and the harm to the human body caused by excessive powder in the emission gas.
[0013] The classification and recycling of coarse and fine powders facilitates the reuse of products from different production lines according to particle size, reduces the subsequent processing and blending costs of fine powders, and allows fine / coarse powders to be stored separately and reused in different processes, reducing unnecessary high-specification reprocessing, improving material utilization, and reducing raw material waste. Attached Figure Description
[0014] Figure 1 This is a frontal cross-sectional view of the present invention.
[0015] Figure 2 This is a front view structural diagram of the cyclone separator of this utility model;
[0016] Figure 3 This is a front view structural diagram of the recycling tower of this utility model;
[0017] Figure 4 This is a front view structural diagram of the bag recycler of this utility model.
[0018] In the diagram: 1. Recovery tower; 2. Feed pump; 3. Powder inlet; 4. Air outlet; 5. Cyclone separator; 6. Powder hopper; 7. Fine powder recovery pump; 8. Fine powder storage tank; 9. Powder-containing exhaust gas inlet; 10. Bag filter; 11. Powder box; 12. Coarse powder recovery pump; 13. Bag filter holder; 14. Coarse powder storage tank; 15. Filter bag; 16. Air manifold; 17. Solenoid valve; 18. Pulse valve; 19. Pulse jet pipe; 20. Clean room; 21. Air outlet pipe; 22. Viewing window; 23. PLC controller; 24. Inspection door. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-4This utility model provides an embodiment of a powder coating production micro-powder recovery system, comprising a recovery tower 1 and a bag filter 10. The bag filter 10 is fixedly connected inside the recovery tower 1. A powder-containing waste gas inlet 9 is installed on the lower left side of the bag filter 10, extending to the outside of the recovery tower 1. A bag filter holder 13 is fixedly installed inside the bag filter 10, with multiple sets of filter bags 15 evenly fixed at the holder 13. The top of the recovery tower 1 is a purification chamber 20, with an exhaust pipe 21 connected to the top of the purification chamber 20. A material pump 2 is installed on the left side of the exhaust pipe 21. 2. The output pipe extends to the outside of the recovery tower 1 and is connected to the powder inlet 3. The output end of the coarse powder recovery pump 12 is connected to the coarse powder storage tank 14. The bag collector 10 is a vertical structure with clean top and ash bottom. The bag fixing frame 13 is disassembled and assembled by bolts. The filter bag 15 is made of antistatic needle-punched felt. A blow pipe 19 is installed on the upper part of the inside of the recovery tower 1. The blow hole of the blow pipe 19 is aligned with the top of the filter bag 15. A pulse valve 18 is installed on the left side of the outer wall of the bag collector 10. A solenoid valve 17 is installed at the pulse valve 18. An air tank 16 is installed at the input end of the pulse valve 18. The output end of the pulse valve 18 is connected to the blow pipe 19.
[0021] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the system is equipped with a bag filter 10 and a cyclone separator 5. Dust-laden exhaust gas enters the bag filter 10 through the dust-laden exhaust gas inlet 9. Inside the bag filter 10, filter bags 15 first intercept and settle larger dust particles. The dust-laden exhaust gas enters the lower part of the bag filter 10 tangentially from the dust-laden exhaust gas inlet 9. Large particles settle to the dust box 11 under the action of inertia and gravity. The rising airflow passes through the outside of the filter bags 15, and coarse powder is intercepted by the filter fiber layer, forming... The powder cake is fed into the purification chamber 20 by purified gas, which then enters the exhaust pipe 21. The air manifold 16, via the pulse valve 18 and the solenoid valve 17 (model VX2120 and model DMF-Z-25), instantaneously releases compressed air into the blow pipe 19, forming a reverse airflow pulsation along the inside of the filter bag 15, shaking the powder cake into the powder box 11. The coarse powder recovery pump 12 (model 2RB630-2AH06) recovers the coarse powder into the coarse powder storage tank 14.
[0022] A cyclone separator 5 is installed on the left side of the outside of the recovery tower 1. A powder inlet 3 is set on the top right side of the cyclone separator 5, and an air outlet 4 is set on the top left side. A powder hopper 6 is set at the bottom of the cyclone separator 5. A fine powder recovery pump 7 is connected to the bottom of the powder hopper 6. The output end of the fine powder recovery pump 7 is connected to the fine powder storage tank 8. A powder box 11 is installed at the bottom of the bag collector 10. A coarse powder recovery pump 12 is connected to the right side of the powder box 11.
[0023] Specifically, such as Figure 1 and Figure 2As shown, a cyclone separator 5 is connected in series at the outlet of the bag filter 10, i.e., the rear end of the air outlet pipe 21, for fine processing. The material pump 2 is a CBF-5.5kW-EX model. The material pump 2 introduces the airflow from the air outlet pipe 21 into the tangential inlet of the cyclone separator 5. The airflow generates strong rotation in the cylindrical section. Under the action of centrifugal force, the particles move towards the wall and down along the cone, and finally fall into the powder hopper 6. The purified gas that flows back from the center is discharged to the air outlet 4 through the upper guide pipe. The lower end of the powder hopper 6 is connected to the fine powder recovery pump 7, which is a 2RB730-2AH16 model. The separated fine powder is sent to the fine powder storage tank 8 to achieve the further separation and recovery of the fine powder into the fine powder storage tank 8.
[0024] The top of the exhaust pipe 21 extends to the top of the recovery tower 1 and is fitted with a sealing cover. A viewing window 22 is installed at the front end of the recovery tower 1. A PLC controller 23 is installed on the left side of the viewing window 22. An inspection door 24 is installed at the bottom of the front end of the recovery tower 1.
[0025] Specifically, such as Figure 1 and Figure 3 As shown, the recovery tower 1 is equipped with a viewing window 22 to facilitate observation of the ash accumulation status of the filter bag 15. The PLC controller 23 is used to set parameters such as pulse jet cleaning, air extraction volume and pump start / stop. The maintenance door 24 is used for personnel to enter the recovery tower 1 for cleaning.
[0026] Furthermore, the PLC controller 23 is electrically connected to the material pump 2, the fine powder recovery pump 7, the coarse powder recovery pump 12, the solenoid valve 17, and the pulse valve 18, respectively.
[0027] Furthermore, an electrostatic discharge path is provided on the inner wall of the recovery tower 1, and the grounding terminals are concentrated to the grounding busbar.
[0028] Working principle: Dust-laden exhaust gas enters tangentially from the dust-laden exhaust gas inlet 9 into the lower part of the bag filter 10 and then rises. Large particles settle to the dust box 11 due to inertia and gravity. The rising airflow penetrates the dust layer on the outer surface of the filter bag 15 and enters the filter fiber layer. Fine powder is trapped to form a stable powder cake. The purified gas flows into the upper purification chamber 20 and enters the exhaust pipe 21. During operation, compressed air in the air tank 16 is driven by the PLC controller 23 to the solenoid valve 17 and pulse valve 18 and injected into the blowpipe 19 according to the set pulse width and interval. A transient reverse airflow is formed inside the cyclone separator 5, causing the powder cake to fall back into the powder box 11, maintaining the filtration resistance within the set range. The suction pump 2 introduces the airflow from the exhaust pipe 21 into the tangential inlet of the cyclone separator 5. The airflow forms a forced rotation along the inner wall of the cylinder. Particles larger than the cutting particle size are driven downward along the cone by the main vortex under the action of centrifugal force, and finally enter the powder hopper 6. The purified gas from the central return and the rising secondary vortex is discharged to the exhaust port 4 through the top guide pipe. The fine powder collected in the powder hopper 6 is transported to the fine powder storage tank 8 by the fine powder recovery pump 7, realizing the graded recovery of fine powder.
[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A micro powder recovery system for powder coating production, comprising a recovery tower (1) and a bag filter (10), characterized in that: A cyclone separator (5) is installed on the left side of the outside of the recovery tower (1). A powder inlet (3) is provided on the right side of the top of the cyclone separator (5), and an air outlet (4) is provided on the left side of the top. A bag filter collector (10) is fixedly connected inside the recovery tower (1). A powder-containing waste gas inlet (9) is installed on the lower left side of the bag filter collector (10). The powder-containing waste gas inlet (9) extends to the outside of the recovery tower (1). A bag filter holder (13) is fixedly installed inside the bag filter collector (10). Multiple sets of filter bags (15) are evenly fixed at the bag filter holder (13). The top of the inside of the recovery tower (1) is a purification chamber (20). The top of the purification chamber (20) is connected to an air outlet pipe (21). A material pump (2) is installed on the left side of the air outlet pipe (21). The output pipe of the material pump (2) extends to the outside of the recovery tower (1) and is connected to the powder inlet (3). A powder hopper (6) is provided at the bottom of the cyclone separator (5). A fine powder recovery pump (7) is connected to the bottom of the powder hopper (6). The output of the fine powder recovery pump (7) is connected to the fine powder storage tank (8). A powder box (11) is installed at the bottom of the bag collector (10). A coarse powder recovery pump (12) is connected to the right side of the powder box (11). The output of the coarse powder recovery pump (12) is connected to the coarse powder storage tank (14).
2. The micro powder recovery system for powder coating production according to claim 1, characterized in that: The bag recycling unit (10) is a vertical structure with clean top and ash bottom. The bag fixing frame (13) is installed and removed by bolts. The filter bag (15) is made of anti-static needle-punched felt.
3. The micro powder recovery system for powder coating production according to claim 1, characterized in that: A blowpipe (19) is installed above the inside of the recycling tower (1). The blowpipe (19) is aligned with the top of the filter bag (15). A pulse valve (18) is installed on the left side of the outer wall of the bag collector (10). A solenoid valve (17) is installed at the pulse valve (18). An air tank (16) is installed at the input end of the pulse valve (18). The output end of the pulse valve (18) is connected to the blowpipe (19).
4. The micro powder recovery system for powder coating production according to claim 1, characterized in that: The top of the vent pipe (21) extends to the top of the recovery tower (1) and is fitted with a sealing cap.
5. A micro powder recovery system for powder coating production according to claim 1, characterized in that: The front end of the recycling tower (1) is equipped with a viewing window (22), and a PLC controller (23) is provided on the left side of the viewing window (22).
6. The powder recovery system for powder coating production according to claim 1, characterized in that: The bottom front end of the recovery tower (1) is provided with an inspection door (24).