A high-efficiency and energy-saving pneumatic conveying system

Abstract

This invention discloses a high-efficiency and energy-saving pneumatic conveying system, relating to the field of energy-saving pneumatic conveying systems. It includes: a pneumatic conveying tank with a material inlet, a first feed pipe, and a second feed pipe at its upper end, and a pneumatic discharge end at its lower end; a pneumatic conveying pipeline is located on its side near the upper part; the pneumatic discharge end is connected to an air compressor for pumping compressed air into the bottom of the pneumatic conveying tank; and a make-up air pipe, one end connected to the pneumatic discharge end and the other end connected to the pneumatic conveying pipeline, the make-up air pipe comprising a flexible hose section and a rigid hose section, the flexible hose section for buffering and shock absorption, and the rigid hose section for stable air delivery; significant energy savings and cost reduction: a single air compressor achieves both tank pressurization and pipeline air replenishment through the make-up air pipe, reducing the number of devices and energy consumption; in energy-saving operation mode, the air compressor does not stop, avoiding the high energy consumption problem of frequent start-stop cycles.

Description

Technical Field

[0001] This invention relates to the field of energy-saving pneumatic conveying systems, and specifically to a high-efficiency energy-saving pneumatic conveying system. Background Technology

[0002] Pneumatic conveying systems utilize compressed air to transport granular materials within pipelines. The material enters the conveying pipeline via a feeding device, where it is suspended and flowed under the influence of airflow. After being transported to its destination, it is separated and collected. This system is closed and environmentally friendly, with flexible layout, and is widely used in industries such as chemical, food, and building materials, achieving efficient, clean, and automated material conveying. Traditional pneumatic conveying systems generally have the following drawbacks:

[0003] 1. High energy consumption: Traditional systems require multiple air compressors for tank pressurization and pipeline air replenishment, resulting in high equipment investment and operating costs; frequent start-up and shutdown of air compressors also cause additional energy consumption.

[0004] 2. Unstable transport: Pressure loss in pipelines during long-distance transport leads to insufficient air supply, which can easily cause material sedimentation and blockage; existing air replenishment methods mostly require additional air sources, making the system complex.

[0005] 3. Difficulty in handling material blockage: When material accumulates and hardens at the bottom of the tank, it is difficult to lift with conventional pneumatics, requiring manual cleaning after machine shutdown, which affects continuous production.

[0006] 4. Single function: A single feed inlet cannot achieve simultaneous conveying and premixing of multiple materials, requiring a separate mixing process later.

[0007] Therefore, we provide a high-efficiency and energy-saving pneumatic conveying system to solve the above problems. Summary of the Invention

[0008] To address the problems existing in the prior art, this invention provides a high-efficiency and energy-saving pneumatic conveying system, which solves the problems of high energy consumption, unstable conveying, difficulty in handling material blockage, and limited functionality in traditional pneumatic conveying systems.

[0009] To achieve the above objectives, the present invention employs a high-efficiency and energy-saving pneumatic conveying system, comprising:

[0010] The pneumatic conveying tank has a material inlet, a first feed pipe and a second feed pipe at the top, a pneumatic discharge end at the bottom, and a pneumatic conveying pipe on the side near the top.

[0011] The pneumatic discharge end is connected to an air pump and is used to pump compressed air into the bottom of the pneumatic delivery tank.

[0012] The air supply pipe is connected to the pneumatic discharge end at one end and to the pneumatic delivery pipeline at the other end. The air supply pipe includes a flexible hose section and a rigid hose section. The flexible hose section is used for buffering and shock absorption, and the rigid hose section is used for stable air delivery.

[0013] The first solenoid valve is installed in the air supply pipe and is used to control the opening and closing of the air supply pipe;

[0014] A dredging pipe is installed at the bottom of the pneumatic conveying tank and connected to the pneumatic conveying pipeline for direct conveying of accumulated materials.

[0015] The third solenoid valve is installed in the drain pipe and is used to control the opening and closing of the drain pipe;

[0016] The material enters from the top of the pneumatic conveying tank, compressed air enters from the bottom, and the gas-solid mixture is discharged from the pneumatic conveying pipe on the upper side. When the pressure in the pneumatic conveying pipe is insufficient, the first solenoid valve is opened to directly supplement the air pressure through the air replenishment pipe. When the material accumulates, the third solenoid valve is opened to directly convey the bottom material through the unblocking pipe.

[0017] As a further optimization of the above scheme, the material inlet is equipped with a switching valve and a check valve. The switching valve is used to control the feeding, and the check valve is used to prevent material backflow.

[0018] As a further optimization of the above scheme, the pneumatic discharge end is equipped with a second solenoid valve to control the main air intake passage; when the pressure in the pneumatic conveying tank is sufficient, the second solenoid valve is closed and the first solenoid valve is opened, so that the air compressor pump runs without stopping and the excess air is added to the pneumatic conveying pipeline.

[0019] As a further optimization of the above solution, a pressure sensor is installed inside the pneumatic conveying pipeline to monitor the pneumatic pressure inside the pipeline. When the pressure is insufficient, the first solenoid valve is activated in conjunction with the sensor.

[0020] As a further optimization of the above solution, the pneumatic conveying tank is equipped with a pressure gauge to monitor the pressure inside the tank and adjust the power of the air compressor accordingly.

[0021] As a further optimization of the above solution, an electrical box is provided on one side of the conveying tank.

[0022] As a further optimization of the above solution, the bottom of the conveying tank is provided with support legs.

[0023] This invention also discloses a high-efficiency and energy-saving pneumatic conveying method, including a high-efficiency and energy-saving pneumatic conveying system, and further including the following steps:

[0024] Feeding procedure: Material is fed to the upper part of the pneumatic conveying tank through the material inlet or the first and second feed pipes;

[0025] Compression step: Start the air pump and pump compressed air into the bottom of the tank through the air discharge end to fluidize the material;

[0026] Main conveying steps: Open the pneumatic conveying pipeline, and the gas-solid mixture is discharged from the side of the upper part of the tank and conveyed along the pipeline;

[0027] Air replenishment procedure: When insufficient pressure is detected in the pneumatic delivery pipeline, open the first solenoid valve of the air replenishment pipe to replenish air into the pipeline from the air discharge end;

[0028] Anti-blocking steps: When the material piles up and cannot be lifted, open the third solenoid valve of the unblocking pipe. The material at the bottom is directly forced into the unblocking pipe by air and then flows into the conveying pipeline.

[0029] Energy-saving operation steps: When the pressure inside the tank is sufficient, close the second solenoid valve at the air discharge end and open the first solenoid valve to keep the air compressor running and replenish the excess air into the delivery pipeline.

[0030] The present invention provides a high-efficiency and energy-saving pneumatic conveying system, which has the following beneficial effects:

[0031] The present invention provides a high-efficiency and energy-saving pneumatic conveying system that significantly saves energy and reduces costs: a single air compressor achieves the dual functions of pressurizing the tank and replenishing air through the air supply pipe, reducing the number of equipment and energy consumption; in the energy-saving operation mode, the air compressor does not stop, avoiding the high energy consumption problem of frequent start-stop.

[0032] The present invention provides a high-efficiency and energy-saving pneumatic conveying system with stable and reliable delivery: the flexible section of the air supply pipe buffers and reduces shock, while the rigid section ensures stable air delivery and prevents pipeline surge; real-time pressure monitoring and automatic air replenishment ensure constant pressure during long-distance delivery.

[0033] The present invention provides a high-efficiency and energy-saving pneumatic conveying system with strong anti-clogging and self-cleaning capabilities: the unblocking pipe enables direct pumping of materials accumulated at the bottom without the need for manual intervention during machine shutdown; the fluidized design with bottom air intake and top material discharge reduces material deposition.

[0034] The present invention provides a high-efficiency and energy-saving pneumatic conveying system with high functional integration: multiple feed pipes enable simultaneous feeding and pneumatic premixing of different materials, simplifying subsequent processes; the structure is compact and does not take up extra space.

[0035] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope as a result, and that the embodiments of the present invention include many changes, modifications and equivalents within the spirit and scope of the appended claims. Attached Figure Description

[0036] Figure 1This is a first-view structural schematic diagram of the high-efficiency and energy-saving pneumatic conveying system of the present invention;

[0037] Figure 2 This is a second-view structural schematic diagram of the high-efficiency and energy-saving pneumatic conveying system of the present invention;

[0038] Figure 3 This is a third-view structural diagram of the high-efficiency and energy-saving pneumatic conveying system of the present invention.

[0039] In the diagram: 1. Pneumatic conveying tank; 2. Material inlet; 3. Pneumatic discharge outlet; 4. Air pump; 5. Pneumatic conveying pipeline; 6. Air supply pipe; 7. Unblocking pipe; 8. First feed pipe; 9. Switch valve; 10. Electrical box; 11. Second feed pipe; 12. Pressure gauge. Detailed Implementation

[0040] Please refer to the instruction manual appendix. Figure 1-3 The present invention provides a technical solution: a high-efficiency and energy-saving pneumatic conveying system.

[0041] refer to Figure 1 The high-efficiency and energy-saving pneumatic conveying system includes a pneumatic conveying tank 1. The upper end of the pneumatic conveying tank 1 has a material inlet end 2, which connects to an external material conveying pipeline. Generally, powdered materials are conveyed into the pneumatic conveying tank 1. The lower end of the pneumatic conveying tank 1 has a pneumatic discharge end 3, which is connected to an air compressor 4. When the air compressor 4 starts, it pumps air into the pneumatic conveying tank 1. The compressed air is stored inside the pneumatic conveying tank 1. A pneumatic conveying pipeline 5 is installed on the side of the pneumatic conveying tank 1. A manual valve or solenoid valve is installed on the pneumatic conveying pipeline 5. When the pneumatic conveying pipeline 5 is opened, the mixture of material and compressed air inside the pneumatic conveying tank 1 is conveyed out under high pressure and transported along the pneumatic conveying pipeline 5 to the designated location, thus achieving the purpose of pneumatic material conveying.

[0042] It should be noted that a switch valve 9 and a check valve are installed on the material inlet end 2;

[0043] Among them, the switch valve 9 is a manual control valve that can control the opening and closing of the material inlet 2; the one-way valve allows external materials to enter the pneumatic conveying tank 1 in one direction without backflow.

[0044] refer to Figure 1 and Figure 3As shown, considering that insufficient air pressure may easily occur in the pneumatic conveying pipeline 5 during actual conveying, the present invention provides an air replenishment pipe 6 on one side of the pneumatic discharge end 3. The air replenishment pipe 6 is connected to the pneumatic conveying pipeline 5, and a first solenoid valve is provided in the air replenishment pipe 6. When the first solenoid valve is opened, a portion of the air pressure passing through the pneumatic discharge end 3 can flow directly into the pneumatic conveying pipeline 5 from the air replenishment pipe 6, thereby specifically replenishing the air pressure in the pneumatic conveying pipeline 5. In the actual process of replenishing air pressure, a pressure sensor is usually used. The pressure sensor is set inside the pneumatic conveying pipeline 5 to monitor whether the air pressure inside the pneumatic conveying pipeline 5 is sufficient. If it is insufficient, the first solenoid valve is opened to replenish the air pressure in the pneumatic conveying pipeline 5.

[0045] In summary, by providing an air supply pipe 6 on one side of the pneumatic discharge end 3, the same air compressor 4 can be used to directly supply air to the pneumatic delivery pipeline 5, eliminating the need for two sets of air compressors 4, thus saving energy and reducing operating costs.

[0046] Furthermore, the air supply pipe 6 includes a vertically arranged rigid pipe section and a curved flexible pipe section. The flexible pipe section is connected to the air inlet end 3, and the rigid pipe section is connected to the air delivery pipe 5. When the air in the air inlet end 3 is supplied to the air delivery pipe 5 through the air supply pipe 6, it first passes through the flexible pipe section. The flexible pipe section buffers and dampens the air, keeping the air entering the rigid pipe section basically stable. Then it flows into the air delivery pipe 5, which can keep the air in the air delivery pipe 5 stable and prevent problems such as surge.

[0047] refer to Figure 2 As shown, a pressure gauge 12 is also installed on the pneumatic conveying tank 1. The pressure gauge 12 is used to monitor the pneumatic pressure inside the pneumatic conveying tank 1. When the pneumatic pressure inside the pneumatic conveying tank 1 is insufficient, the power of the air compressor 4 is increased to accelerate the supply of pneumatic pressure to the pneumatic conveying tank 1. When the pneumatic pressure inside the pneumatic conveying tank 1 is sufficient, the second solenoid valve installed in the pneumatic discharge end 3 can be closed, and the first solenoid valve in the air replenishment pipe 6 can be opened, so that the air compressor 4 does not stop, but the excess pneumatic pressure is replenished into the pneumatic conveying pipeline 5 to compensate for the pneumatic damage during the material transmission process. There is no need to stop the machine, which reduces the problem of high energy consumption caused by frequent start-up and shutdown of the equipment, and is more energy-efficient.

[0048] In this invention, the pneumatic conveying tank 1 enters from the bottom and the material enters from the top, which allows the gas to fully disperse the material inside the pneumatic conveying tank 1. The mixture of gas and material is then discharged from the pneumatic conveying pipe 5 on the side of the pneumatic conveying tank 1. The pneumatic conveying pipe 5 is connected and set near the upper part of the pneumatic conveying tank 1, which ensures that the material is gradually pumped out and is not prone to clogging or sedimentation.

[0049] refer to Figure 1 and Figure 3 As shown in the diagram, a further step is to install a drain pipe 7 at the bottom of the pneumatic conveying tank 1, which is connected to the pneumatic conveying pipeline 5. When there is a large amount of material inside the pneumatic conveying tank 1, and the pneumatic conveying cannot lift the material after passing through it, the third solenoid valve installed in the drain pipe 7 can be opened. At this time, the material at the bottom of the pneumatic conveying tank 1 is directly conveyed into the drain pipe 7 by the pneumatic conveying system at the bottom of the pneumatic conveying tank 1 and then into the pneumatic conveying pipeline 5. This avoids the problem of continuous blockage caused by the accumulation of material that cannot be lifted. After the material is pumped out into the pneumatic conveying tank 1 and can be lifted, the material can be conveyed using the pneumatic conveying pipeline 5.

[0050] refer to Figure 2 As shown, a first feed pipe 8 and a second feed pipe 11 are also provided at the upper end of the pneumatic conveying tank 1. The first feed pipe 8 and the second feed pipe 11 are respectively connected to the external feeding pipeline. Through the sharing of the first feed pipe 8, the second feed pipe 11 and the material inlet 2, different materials can be uniformly conveyed into the pneumatic conveying tank 1 at the same time. The materials are mixed during the pneumatic conveying process to form the initial material, which effectively avoids the phenomenon of needing to stir and mix in the later stage, and saves energy and is environmentally friendly.

[0051] It should be noted that the bottom of the pneumatic conveying tank 1 is equipped with support legs, and an electrical box 10 is provided on one side of the pneumatic conveying tank 1. The electrical box 10 integrates a controller, which is usually a control chip used to link the sensor and the actuator. This is a common existing technology and will not be described in detail here.

[0052] Workflow:

[0053] S1: Material feeding stage;

[0054] Open the switch valve 9 at the material inlet 2, and external materials enter the upper part of the pneumatic conveying tank 1 through the check valve;

[0055] Different materials can be introduced simultaneously through the first feed pipe 8 and the second feed pipe 11 to achieve premixing.

[0056] S2: Pneumatic compression stage;

[0057] Start the air pump 4 and pump compressed air into the bottom of the pneumatic delivery tank 1 through the pneumatic discharge end 3;

[0058] The gas flows from bottom to top, fully dispersing and fluidizing the material;

[0059] Pressure gauge 12 monitors the pressure inside the tank in real time, and prepares for delivery after the set value is reached.

[0060] S3: Main conveying stage;

[0061] Open the valve of pneumatic conveying pipeline 5, and the gas-solid mixture will be discharged from the side of the upper part of the tank and transported to the destination under high pressure along the pipeline;

[0062] During the delivery process, if the pipeline pressure sensor detects insufficient air pressure, the first solenoid valve of the air supply pipe 6 is opened to directly supply air to the pipeline from the air supply inlet 3, without the need for an additional air compressor.

[0063] S4: Blockage and Clearance Phase;

[0064] When the material piles up and cannot be lifted, open the third solenoid valve of the unblocking pipe 7. The material at the bottom is directly forced into the unblocking pipe 7 by air and then flows into the conveying pipeline to avoid continuous blockage.

[0065] S5: Energy-saving operation phase;

[0066] When the pressure inside the tank is sufficient, close the second solenoid valve of the air inlet 3 and open the first solenoid valve of the air supply pipe 6. The air compressor 4 will not stop running, and the excess air will be directly supplied to the delivery pipeline to compensate for transmission loss and avoid frequent start-stop.

Claims

1. A high-efficiency and energy-saving pneumatic conveying system, characterized in that, include: The pneumatic conveying tank (1) is provided with a material inlet end (2), a first feed pipe (8) and a second feed pipe (11) at its upper end, a pneumatic discharge end (3) at its lower end, and a pneumatic conveying pipe (5) on its side near the upper part. The pneumatic discharge end (3) is connected to the air compressor (4) and is used to pump compressed air into the bottom of the pneumatic delivery tank (1); The gas supply pipe (6) is connected at one end to the gas discharge end (3) and at the other end to the gas delivery pipe (5). The gas supply pipe (6) includes a flexible hose section and a rigid pipe section. The flexible hose section is used for buffering and shock absorption, and the rigid pipe section is used for stable gas delivery. The first solenoid valve is installed in the air supply pipe (6) and is used to control the opening and closing of the air supply pipe (6); The unblocking pipe (7) is set at the bottom of the pneumatic conveying tank (1) and connected to the pneumatic conveying pipeline (5) for direct conveying of accumulated materials; The third solenoid valve is installed in the unblocking pipe (7) and is used to control the opening and closing of the unblocking pipe (7); The material enters from the top of the pneumatic conveying tank (1), compressed air enters from the bottom, and the gas-solid mixture is discharged from the pneumatic conveying pipe (5) on the upper side. When the pressure in the pneumatic conveying pipe (5) is insufficient, the first solenoid valve is opened and the air supply pipe (6) is used to directly supplement the air. When the material accumulates, the third solenoid valve is opened and the bottom material is directly conveyed through the unblocking pipe (7).

2. The high-efficiency and energy-saving pneumatic conveying system according to claim 1, characterized in that: The material inlet (2) is equipped with a switch valve (9) and a check valve. The switch valve (9) is used to control the feeding, and the check valve is used to prevent material backflow.

3. The high-efficiency and energy-saving pneumatic conveying system according to claim 1, characterized in that: The pneumatic discharge end (3) is equipped with a second solenoid valve to control the main air intake passage. When the pressure in the pneumatic conveying tank (1) is sufficient, the second solenoid valve is closed and the first solenoid valve is opened, so that the air compressor (4) runs without stopping and the excess air is added to the pneumatic conveying pipeline (5).

4. The high-efficiency and energy-saving pneumatic conveying system according to claim 1, characterized in that: A pressure sensor is installed inside the pneumatic conveying pipeline (5) to monitor the pneumatic pressure inside the pipeline. When the pressure is insufficient, the first solenoid valve is activated in conjunction with the pipeline.

5. The high-efficiency and energy-saving pneumatic conveying system according to claim 1, characterized in that: The pneumatic conveying tank (1) is equipped with a pressure gauge (12) to monitor the pressure inside the tank and adjust the power of the air compressor (4) in conjunction with the pressure.

6. The high-efficiency and energy-saving pneumatic conveying system according to claim 1, characterized in that: An electrical box (10) is provided on one side of the conveying tank (1).

7. The high-efficiency and energy-saving pneumatic conveying system according to claim 1, characterized in that: The bottom of the conveying tank (1) is provided with support legs.

8. A highly efficient and energy-saving pneumatic conveying method, characterized in that: The high-efficiency and energy-saving pneumatic conveying system according to any one of claims 1-7 includes the following steps: Feeding steps: Feed material to the upper part of the pneumatic conveying tank (1) through the material inlet (2) or the first feed pipe (8) and the second feed pipe (11); Compression steps: Start the air pump (4) and pump compressed air into the bottom of the tank through the pneumatic discharge end (3) to fluidize the material; Main conveying steps: Open the pneumatic conveying pipeline (5), and the gas-solid mixture is discharged from the upper side of the tank and conveyed along the pipeline; Air replenishment steps: When insufficient pressure is detected in the pneumatic conveying pipeline (5), the first solenoid valve of the air replenishment pipe (6) is opened to replenish the pipeline from the pneumatic discharge end (3); Anti-blocking steps: When the material piles up and cannot be lifted, open the third solenoid valve of the unblocking pipe (7), and the bottom material is directly pressed into the unblocking pipe (7) by air force and then flows into the conveying pipeline. Energy-saving operation steps: When the pressure inside the tank is sufficient, close the second solenoid valve of the air discharge end (3) and open the first solenoid valve to keep the air compressor (4) running and replenish the excess air into the delivery pipeline.

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