For the Roots blower used in pneumatic conveying of industrial alumina powder, the following is a detailed introduction:
1、 Working principle
Roots blower is a positive displacement fan that operates based on two synchronously rotating impellers (usually three bladed) rotating in opposite directions within a sealed casing. When the impellers rotate, they continuously change the volume of gas, pushing it from the inlet to the outlet. This design enables Roots blowers to generate higher pressure at lower speeds, making them suitable for applications that require high-pressure gas.
2、 Structural characteristics
1. Shell: mainly used to support wall panels, impellers, mufflers, and fixed functions.
2. Wall panel: mainly used for connecting the shell and impeller, supporting the rotation of the impeller and the sealing effect of the end face.
3. Impeller: The rotating part of a Roots blower. Compared to a two blade Roots blower, a three blade Roots blower has smaller air pulsation, lower noise, and smoother operation, making it more suitable for pneumatic conveying of alumina powder.
4. Muffler: Used to reduce the flow noise generated by Roots blower due to airflow pulsation.
In addition, the Roots blower also includes components such as bearings, seals, and transmission systems, with a compact structure that is easy to disassemble and maintain.
3、 Selection and Performance Parameters
1. Selection: The selection of Roots blower needs to be determined based on factors such as the physical characteristics of alumina powder, conveying distance, conveying volume, and system pressure requirements.
2. Air volume and air pressure: Select the appropriate air volume and air pressure based on the conveying volume and distance of the alumina powder. The air volume should ensure the stable flow of alumina powder in the pipeline, while the air pressure should overcome the pipeline resistance to ensure that the alumina powder can reach the target position smoothly.
3. Speed and power: The speed and power of the Roots blower need to be matched according to the air volume, air pressure, and system efficiency. A higher rotational speed usually means greater air volume and pressure, but it can also increase power consumption and noise. Therefore, a balance needs to be made based on actual needs.
Performance parameters:
1. Airflow: Calculate the required airflow based on the conveying volume of alumina powder, pipeline diameter, and conveying speed.
2. Wind pressure: Calculate the required wind pressure based on factors such as pipeline length, number of bends, valve resistance, and consider the margin.
3. Efficiency: Select Roots blowers with high selectivity to reduce energy consumption and operating costs.
4. Noise: Choose low-noise Roots blowers and consider implementing sound insulation measures to reduce their impact on the surrounding environment.
4、 Control system
1. Variable frequency speed regulation: Adopting a variable frequency speed regulation system, it can achieve stepless speed regulation of the fan, adjust the air volume and pressure according to actual needs, and improve system efficiency and energy-saving effect.
2. Remote monitoring: Set up a remote control system to monitor the real-time operation status, fault alarms, and other information of the fan, facilitating remote management and maintenance.
3. Protection function: Set protection functions such as overvoltage, undervoltage, overcurrent, overload, etc. to ensure that the fan can automatically stop in case of abnormal conditions, preventing damage and accidents.
5、 Application advantages
1. Energy saving: Adopting advanced fluid dynamics design, the Roots blower can output larger air volume and pressure at the same power, reducing energy consumption.
2. Stable and reliable: Roots blower has a simple and sturdy structure, with low vibration and noise during operation, and high stability and reliability.
3. Strong adaptability: Roots blower can transport high temperature, high pressure or corrosive gases, suitable for various special working conditions. Its core components are made of high-strength and wear-resistant materials, which can operate stably for a long time in harsh environments.
4. Easy maintenance: The design of Roots blower is easy to maintain and repair. When disassembling and replacing components, there is no need for complex operations, reducing maintenance difficulty and costs.
6、 Precautions
1. Pipeline design: Reasonably design pipeline layout and diameter, reduce the number of elbows and valves, lower pipeline resistance, and improve transportation efficiency.
2. Dust removal device: A dust removal device is installed at the end of the conveying system to separate the alumina powder from the transport airflow and avoid dust pollution.
3. Maintenance: Regularly maintain the Roots blower, check the wear of bearings, gears, and other components, replace damaged parts in a timely manner, and ensure long-term stable operation of the blower.
In summary, Roots blowers for pneumatic conveying of industrial alumina powder have many advantages and are an ideal choice for alumina powder conveying systems. In the process of selection and use, reasonable configuration and selection should be made according to actual needs, and regular maintenance and upkeep should be carried out to ensure the normal operation and prolong the service life of the fan.
