Bin-type pneumatic conveying pump is an industrial conveying equipment mainly used for the transportation of solid materials. It features material conveying, quantitative feeding, anti-clogging, dust reduction, space saving, low noise, easy maintenance and strong material adaptability, making it an ideal choice for industrial solid material handling.Its working principle covers feeding, conveying and discharging stages. As an important equipment in industrial production, the bin-type pneumatic conveying pump is widely used in various industries for efficient solid material transfer.
Composed of a diffusion chamber, pump body, movable air duct, actuator and other components, the bin-type pneumatic conveying pump is widely applied in the transportation of powder materials such as power plant fly ash, cement, cement raw meal and mineral powder.The conveying pipelines can be flexibly arranged according to topographic conditions to achieve centralized, decentralized, high-altitude and long-distance conveying. The conveying process is not affected by natural conditions, which can ensure that materials are not damp and realize environmental protection without pollution, meeting the environmental requirements of modern industrial production.This pneumatic conveying pump adopts a PLC control system, allowing automatic or manual control. With stable performance, reliable quality and dust-free conveying, it is an ideal pneumatic conveying equipment for industrial material handling needs.
Pneumatic conveying pump is a relatively reliable dense-phase dynamic pressure pneumatic conveying device for transporting powder materials under high pressure (below approximately 700kPa), suitable for various powder material conveying scenarios.It has two discharging methods, among which bottom discharging is the most commonly used one. The materials in the tank can be fluidized through inflation of the conical air inflation groove, nozzle air injection or other methods; setting a fluidized air inflation plate (layer) at the bottom enables the materials to be discharged from the upper part of the tank, enhancing the flexibility of material discharging.The distribution of conveying gas on different input planes in the tank depends on the properties of the conveyed materials, so it is necessary to select the appropriate configuration according to the actual material characteristics.
Applications:
Pneumatic conveying pump is suitable for conveying powder materials such as fly ash, cement, cement raw meal, carbon powder, mineral powder, grain and chemical raw materials, widely meeting the material conveying needs of power, building materials, chemical and food industries.
Working Process:
- Open the feeding valve and exhaust valve, and the conveying pump feeds under normal pressure until the horizontal level gauge sends a signal indicating that the bin is full, ensuring accurate material feeding volume.
- Close the feeding valve and exhaust valve, then open the high-pressure gas valve to pressurize the inside of the tank, creating a suitable pressure environment for material conveying.
- When the operating pressure is reached, open the conveying air valve and discharging valve, and the material starts to be conveyed stably.
- The end of conveying is indicated by a pressure switch, level gauge or time relay. At this time, close the high-pressure gas valve and discharging valve, so that all compressed air is used to purge the conveying pipeline; at the same time, open the exhaust valve to reduce the pressure inside the tank to normal pressure. After one working cycle is completed, another cycle continues, realizing continuous and efficient material conveying.
Structure:
- Feeding Device: Also called feeding valve, it is installed on the upper part of the pneumatic conveying pump and used to control the feeding of the pneumatic conveying pump. It uses an air cylinder to control the up and down movement of the conical valve, thereby opening and closing the feeding port, ensuring smooth material feeding.
- Exhaust Device: Also called exhaust valve, it is installed on the upper part of the pneumatic conveying pump. Its function is to open or close the valve through the action of the air cylinder, so that the residual air in the pneumatic conveying pump is discharged to the storage bin, maintaining the normal pressure inside the pump.
- Fluidization Device: Also called gasification chamber, it is installed at the bottom of the pneumatic conveying pump. A gasification device is arranged at the lower part of the chamber, and an injection pipe is arranged at the middle part, promoting the fluidization of materials for easy conveying.
- Pneumatic Discharging Valve: Installed at the material outlet of the pneumatic conveying pump. This valve opens when the pneumatic conveying pump is conveying and closes when the conveying of the pneumatic conveying pump ends. During operation, the air cylinder drives the double gate valve core to move up and down and rotate through the piston rod, thereby opening or closing the valve, ensuring accurate control of material discharge.
- Pump Body: As the material storage device for the sending part of the entire conveying system, it is a wear-resistant and fatigue-resistant pressure vessel that can withstand the scouring and wear of air flow and materials for a long time, ensuring long-term stable operation of the equipment.
- Electrical Control Cabinet: Usually, one pneumatic conveying pump is equipped with one control cabinet. However, when pneumatic conveying pumps are used for parallel conveying or conveying at the same location, the electrical control parts of two or more pumps can be concentrated in one control cabinet for unified control. Its control system can adopt relay control, or PLC programmable controller or industrial computer control (users should specify when placing an order), meeting different control needs of users.
- Pneumatic Control Box: Also called solenoid valve box, it is installed on the outriggers or pump body of the pneumatic conveying pump. The box is generally equipped with solenoid valves that control the operation of the air cylinder of each pneumatic conveying pump. Usually, one pneumatic conveying pump is equipped with one solenoid valve box, ensuring independent and stable control of each pump.
- Pipelines and Valves: Generally, only various valves and connecting components used with the pneumatic conveying pump are configured, such as branch air pipes, pneumatic control hoses, pressure gauges, various control valves, etc., ensuring the integrity and normal operation of the conveying system.
If users have special requirements, such as matching intermediate bins, discharging valves, diverter valves, screw gates, level gauges and pressure transmitters, they can also be configured according to user requirements. A metering and weighing device can also be configured to realize quantitative material conveying, meeting the personalized needs of users.
Since pneumatic conveying is different from general mechanical conveying, users must specify the conveying distance, height and the name of the conveyed material when placing an order to facilitate reasonable matching and ensure the conveying effect meets the actual needs.
Common Faults and Treatments:
- Low compressed air pressure in the air storage tank or the intake valve cannot be opened in place. Check the air supply system and the intake valve structure in time to ensure normal air pressure and valve operation.
- Air Leakage of Feeding Valve: a. The feeding valve is not closed in place. Solution: Adjust the stroke position of the air cylinder to make the valve cover of the feeding valve close tightly, ensuring good sealing performance. b. The upper and lower sealing rings of the feeding valve seat or valve cover are blown and damaged. Solution: It is necessary to disassemble the entire feeding valve assembly, remove the upper and lower sealing rings, check whether the valve seat and valve cover are blown and damaged. If so, perform repair welding and turning processing, then replace with new sealing rings to restore the sealing effect of the feeding valve.
- Air Leakage of Discharging Valve: a. The discharging valve is not closed in place. Solution: Notify the thermal engineering personnel to check the solenoid valve and air pipeline to eliminate faults in the control and air supply parts. b. The sealing component of the discharging valve is blown and damaged, so the discharging valve needs to be replaced to ensure the normal sealing and discharging function of the valve.
- Blockage of the Vulcanized Cloth of the Bin Pump: a. There is much fly ash with high viscosity and dampness. This situation usually occurs after the maintenance of electrostatic precipitators, caused by water flushing of electrostatic precipitators or long-term non-use. Clean the fly ash in time and ensure the dryness of the material. b. Excessive moisture in the compressed air causes blockage of the vulcanized cloth. It is necessary to check whether the purification device after the air compressor outlet is normal and the drainage condition of the air storage tank to ensure that the compressed air is dry, avoiding blockage of the vulcanized cloth.