A negative pressure powder conveying system
By using a negative pressure powder conveying system with Roots blowers and cyclone pulse dust collectors, the problems of powder pollution and blockage in the powder conveying system have been solved, achieving efficient and stable powder conveying and environmental protection effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA ALUMINUM ZHONGZHOU ALUMINUM CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-03
AI Technical Summary
Existing powder conveying systems are prone to powder contamination, easy blockage of conveying pipelines, and dust leakage, which affect the environment and safety.
A negative pressure powder conveying system is adopted, which uses a Roots blower to create a negative pressure environment, combined with cyclone airflow and cyclone pulse dust collector to achieve stable conveying and efficient collection of powder.
It improves powder conveying efficiency, reduces blockages and dust pollution, ensures the purity and safety of powder, and reduces maintenance costs.
Smart Images
Figure CN224449479U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of powder conveying technology, and more specifically to a negative pressure powder conveying system. Background Technology
[0002] In the powder transportation process, an efficient and environmentally friendly powder conveying system is crucial for improving production efficiency, ensuring product quality, and reducing environmental pollution. Traditional powder conveying systems typically employ either mechanical or pneumatic conveying. Mechanical conveying systems use screw conveyors, bucket elevators, etc., to transport powder. While the structure of mechanical conveying systems is relatively simple, they are prone to mechanical wear, causing powder contamination and resulting in substandard product quality. Furthermore, mechanical conveying systems have limited adaptability to powder materials and are ineffective in handling fine, poorly flowing powders. Pneumatic conveying systems can achieve long-distance, enclosed powder transportation, but the conveying pipelines are prone to blockage, and the dust removal effect of the conveying system is poor, leading to dust leakage, which not only affects the working environment but may also threaten production safety. Therefore, developing and designing an efficient, stable, and environmentally friendly powder conveying system is of great significance in order to improve the overall performance of powder conveying systems. Summary of the Invention
[0003] To address the problems of easy contamination of powder, easy blockage of conveying pipelines, and dust leakage that pollute the environment in the existing technologies, the present invention provides a negative pressure powder conveying system. A Roots blower is used to create a negative pressure environment within the conveying system, and the powder in the system is conveyed by a cyclone airflow.
[0004] To achieve the above objectives, the technical solution of the present invention is as follows:
[0005] A negative pressure powder conveying system includes a Venturi powder conveyor, a cyclone pulse dust collector, a finished product silo, and a Roots blower. The Venturi powder conveyor has a feed pipe at the top and a discharge bend at the bottom. The top of the Venturi powder conveyor is connected to an air filter via a pipeline. The cyclone pulse dust collector includes, from top to bottom, a purification chamber, a cyclone feed cylinder, and a dust hopper. A perforated plate is provided between the purification chamber and the cyclone feed cylinder. The perforated plate has multiple fixing holes for fixing dust collection filter bags. The purification chamber is equipped with an air outlet connected to the Roots blower. A high-pressure air duct is installed within the purification chamber, with multiple branches connected to the dust collector filter bags. Each branch is equipped with a pulse solenoid valve. The discharge bend is connected to the cyclone feed cylinder via a pipe. A discharge pipe is located at the bottom of the ash hopper and connects to the top of the finished product silo. The Roots blower is connected to a motor. One end of the pipe unblocking tube is connected to the bend of the discharge bend, and the other end of the pipe unblocking tube is connected to an air filter.
[0006] Furthermore, the feed pipe is equipped with a feed valve and a discharge device.
[0007] Furthermore, a discharge valve is provided on the discharge bend.
[0008] Furthermore, the discharge bend is provided with an observation port.
[0009] Furthermore, the pipeline unblocking pipe is equipped with a valve.
[0010] Furthermore, the feeding pipe is equipped with a feeding valve and a discharge device.
[0011] Furthermore, the unloader is a star-shaped unloader.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0013] This invention provides a negative pressure powder conveying system. Through the design of a Venturi powder conveyor, the system utilizes the principle of negative pressure to achieve effective powder conveying, improving conveying efficiency. The application of a Roots blower further enhances the system's aerodynamics, ensuring stable powder flow within the pipeline and reducing conveying interruptions caused by blockages or poor airflow. A cyclone pulse dust collector organically combines cyclone powder collection with electronic pulse dust collection, allowing approximately 80% of coarse powder particles to fall directly into the ash hopper upon entering the pulse dust collector, reducing the pulse dust collection load pressure. Simultaneously, it effectively captures dust in the airflow, significantly improving the powder collection rate and reducing environmental pollution from exhaust gases. The connection design between the discharge bend and the pipeline unblocking pipe facilitates pipeline unblocking, eliminating the need for pipeline disassembly and reducing maintenance costs and time. An air filter effectively prevents airborne impurities from contaminating the powder, improving product purity. Furthermore, this conveying system effectively utilizes vertical space, reducing floor space requirements and enabling automated packaging and mechanical handling. Attached Figure Description
[0014] The embodiments of the present invention will be further described below with reference to the accompanying drawings, wherein:
[0015] Figure 1 A schematic diagram of an embodiment of a negative pressure powder conveying system is shown;
[0016] Attached diagram labels: 1-Venturi powder conveyor, 2-Cyclone pulse dust collector, 21-Clean room, 22-Cyclone feed cylinder, 23-Dust hopper, 24-Pulse solenoid valve, 3-Finished product silo, 4-Roots blower, 5-Feed pipe, 6-Discharge bend, 7-Air filter, 8-High-pressure air pipeline, 9-Discharge pipe, 10-Motor, 11-Pipeline unblocking pipe, 12-Feed valve, 13-Unloader, 14-Discharge valve, 15-Observation port, 16-Valve, 17-Discharge valve, → indicates the direction of gas or powder flow. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0018] A negative pressure powder conveying system includes a Venturi powder conveyor 1, a cyclone pulse dust collector 2, a finished product silo 3, and a Roots blower 4. The Venturi powder conveyor 1 has a feed pipe 5 at its top and a discharge bend 6 at its bottom. An air filter 7 is connected to the top of the Venturi powder conveyor 1 via a pipeline. The cyclone pulse dust collector 2 includes, from top to bottom, a purification chamber 21, a cyclone feed cylinder 22, and a dust hopper 23. A tube sheet is provided between the purification chamber 21 and the cyclone feed cylinder 22. The tube sheet has multiple fixing holes for fixing dust collector filter bags. The tube sheet is used for isolation... The system is located between the purification chamber 21 and the cyclone feed cylinder 22. The purification chamber 21 is equipped with an air outlet, which is connected to the Roots blower 4. The purification chamber 21 is equipped with a high-pressure air pipeline 8, which has multiple branches connected to dust collector filter bags. Each branch is equipped with a pulse solenoid valve 24. The discharge bend 6 is connected to the cyclone feed cylinder 22 via a pipeline. The bottom of the ash hopper 23 is equipped with a discharge pipe 9, which is connected to the top of the finished product silo 3. The Roots blower 4 is connected to a motor 10. The bend of the discharge bend 6 is connected to one end of a pipeline unblocking pipe 11, and the other end of the pipeline unblocking pipe 11 is connected to an air filter 7.
[0019] In one embodiment of the present invention, the feed pipe 5 is provided with a feed valve 12 and a discharger 13.
[0020] In one embodiment of the present invention, a discharge valve 14 is provided on the discharge bend.
[0021] In one embodiment of the present invention, an observation port 15 is provided on the discharge bend to facilitate observation of the powder blockage in the discharge bend 6.
[0022] In one embodiment of the present invention, a valve 16 is provided on the pipeline unblocking pipe 11.
[0023] In one embodiment of the present invention, the feeding pipe 9 is provided with a feeding valve 17 and a discharger 13.
[0024] In one embodiment of the present invention, the unloader 13 is a star-shaped unloader.
[0025] In operation, open the feed valve 12 and discharge valve 17, close the discharge valve 14 and valve 16, and turn on the motor 10 and Roots blower 4 to bring the entire powder conveying system into a negative pressure state. The powder enters the Venturi powder conveyor 1 through the feed pipe 5 and, driven by the cyclone airflow, enters the cyclone feed cylinder 22. Large powder particles fall into the ash hopper 23, while fine powder particles are captured on the surface of the filter bags. The purified air enters the purification chamber 21 and is discharged by the Roots blower. The fine powder particles captured by the filter bags fall into the ash hopper 23 under the action of the pulsed airflow. The powder in the ash hopper 23 is discharged into the finished product silo 3 through the discharge pipe 9.
[0026] When clearing the pipeline, first close the feed valve 12 and open the discharge valve 14 to discharge the powder from the Venturi powder conveyor 1. Then close the discharge valve 14, open valve 16 and discharge valve 17, and turn on motor 10 and Roots blower 4 to put the entire powder conveying system under negative pressure. The powder deposited in the pipeline enters the cyclone pulse dust collector 2 under the action of the cyclone airflow. The bend of the discharge bend 6 is easily blocked by powder. The pipeline clearing pipe 11, located at the bend of the discharge bend 6, blows airflow into the bend of the discharge bend 6 under negative pressure to clear the pipeline.
[0027] This invention provides a negative pressure powder conveying system. Through the design of a Venturi powder conveyor, the system utilizes the principle of negative pressure to achieve effective powder conveying, improving conveying efficiency. The application of a Roots blower further enhances the system's aerodynamics, ensuring stable powder flow within the pipeline and reducing conveying interruptions caused by blockages or poor airflow. A cyclone pulse dust collector organically combines cyclone powder collection with electronic pulse dust collection, allowing approximately 80% of coarse powder particles to fall directly into the ash hopper upon entering the pulse dust collector, reducing the pulse dust collection load pressure. Simultaneously, it effectively captures dust in the airflow, significantly improving the powder collection rate and reducing environmental pollution from exhaust gases. The connection design between the discharge bend and the pipeline unblocking pipe facilitates pipeline unblocking, eliminating the need for pipeline disassembly and reducing maintenance costs and time. An air filter effectively prevents airborne impurities from contaminating the powder, improving product purity. Furthermore, this conveying system effectively utilizes vertical space, reducing floor space requirements and enabling automated packaging and mechanical handling.
[0028] The foregoing descriptions have outlined some exemplary embodiments of the present invention. It is understood that these embodiments are merely illustrative and do not constitute a limitation on the scope of protection of the present invention. Features in these embodiments can be rearranged in suitable ways, and the resulting solutions remain within the scope of protection claimed by the present invention. All other embodiments obtained by those skilled in the art based on the foregoing embodiments without inventive effort, i.e., all modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by the present invention.
Claims
1. A negative pressure powder conveying system, characterized by, The system includes a Venturi powder conveyor (1), a cyclone pulse dust collector (2), a finished product silo (3), and a Roots blower (4); the Venturi powder conveyor (1) has a feed pipe (5) at the top and a discharge bend (6) at the bottom; the top of the Venturi powder conveyor (1) is connected to an air filter (7) via a pipeline; the cyclone pulse dust collector (2) includes, from top to bottom, a purification chamber (21), a cyclone feed cylinder (22), and a dust hopper (23); a tube sheet is provided between the purification chamber (21) and the cyclone feed cylinder (22); the tube sheet has multiple fixing holes, and dust filter bags are fixed in the fixing holes; the purification chamber (21) has an air outlet. The air outlet is connected to the Roots blower (4), and the purification chamber (21) is equipped with a high-pressure air duct (8). The high-pressure air duct (8) is equipped with multiple branches, which are connected to the dust removal filter bag. The branches are equipped with pulse solenoid valves (24). The discharge bend (6) is connected to the cyclone feed cylinder (22) through a pipeline. The bottom of the ash hopper (23) is equipped with a discharge pipe (9), which is connected to the top of the finished product silo (3). The Roots blower (4) is connected to a motor (10). The bend of the discharge bend (6) is connected to one end of the pipeline unblocking pipe (11), and the other end of the pipeline unblocking pipe (11) is connected to an air filter (7).
2. A negative pressure powder delivery system according to claim 1, wherein, The feed pipe (5) is equipped with a feed valve (12) and a discharger (13).
3. A negative pressure powder delivery system according to claim 1, wherein The discharge bend is equipped with a discharge valve (14).
4. A negative pressure powder delivery system according to claim 1 or 3, wherein The discharge bend is equipped with an observation port (15).
5. The negative pressure powder delivery system of claim 1, wherein, A valve (16) is provided on the pipeline unblocking pipe (11).
6. A negative pressure powder delivery system according to claim 1, wherein The discharge pipe (9) is equipped with a discharge valve (17) and a discharge device (13).
7. A negative pressure powder conveying system according to claim 2 or 6, characterized in that, The unloader (13) is a star-shaped unloader.