Design of Roots blower system for pneumatic conveying of granite powder
The design of Roots blower system for pneumatic conveying of granite powder requires comprehensive consideration of multiple factors, including the physical characteristics of granite powder, conveying distance, conveying volume, system pressure requirements, as well as economy and reliability. Here is a detailed design plan based on these factors:
1、 System Overview
The pneumatic conveying system utilizes airflow to transport materials (in this case, granite powder) in pipelines. The Roots blower serves as the power source for the system, providing stable airflow. The goal of system design is to achieve continuous and stable transportation of granite powder, while ensuring the economy and reliability of the system.
2、 Selection of Roots blower
1. Air volume and air pressure: Select the appropriate air volume and air pressure based on the conveying volume and distance of granite powder. The air volume should ensure that the granite powder can stably suspend and move forward in the pipeline, while the air pressure needs to overcome the pipeline resistance to ensure that the material can reach the target position smoothly.
2. 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. The selection of rotational speed should take into account factors such as fan noise, wear and tear, and maintenance costs.
3. Structure type: Choose a Roots blower structure suitable for granite powder transportation, such as a three bladed Roots blower, which has smaller air pulsation, lower noise, and smoother operating characteristics.
3、 System parameter design
1. Mixing ratio: Mixing ratio refers to the ratio of the mass of material transmitted per unit time to the mass of air. When determining the mixing ratio, it is necessary to consider factors such as the limitation of vacuum degree during pneumatic conveying suction, conveying distance and pipeline layout, and the diameter of the conveying pipeline. Reasonable setting of mixing ratio can help improve conveying efficiency and reduce energy consumption.
2. Wind speed: The choice of wind speed is related to the economy and reliability of the system. Excessive wind speed increases power consumption, leading to wear and material breakage of the conveying pipe; If the wind speed is too low, the materials inside the pipe are prone to accumulation and blockage. Therefore, the appropriate wind speed should be selected based on the mechanism of suspended pneumatic conveying and the physical characteristics of the material.
3. Pipeline design: Reasonably design the pipeline layout and diameter, reduce the number of elbows and valves to reduce pipeline resistance and improve transportation efficiency. At the same time, the selection of pipeline materials also needs to consider wear resistance and corrosion resistance.
4、 Control system design
1. Variable frequency speed regulation: Adopting a variable frequency speed regulation system, the fan speed and air volume can be adjusted according to actual needs to achieve energy conservation and consumption reduction.
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: Set up overvoltage, undervoltage, overcurrent, overload and other protection functions to ensure that the fan can automatically stop in case of abnormal conditions, damage and accidents.
5、 Economic and reliability analysis
1. Economy: Minimize equipment costs, operating costs, and maintenance costs while ensuring system performance. By optimizing system design, selecting appropriate equipment models and parameters, and adopting energy-saving and consumption reducing technical measures, the economy of the system can be achieved.
2. Reliability: The system should have high reliability and stability to ensure the continuous and stable transportation of granite powder. By selecting high-quality equipment, strengthening maintenance, and implementing protective measures, the reliability of the system can be improved.
6、 Summary
The design of the Roots blower system for pneumatic conveying of granite powder is a comprehensive engineering problem that requires consideration of multiple factors. Through reasonable selection, parameter design, control system design, and economic and reliability analysis, continuous and stable granite powder transportation can be achieved to meet production needs. Meanwhile, the design and operation of the system must also comply with relevant standards and requirements.
