Precautions for selecting Roots blower for gypsum powder pneumatic conveying
When selecting a Roots blower for gypsum powder pneumatic conveying, the following key aspects should be noted to ensure that the performance, efficiency, and performance of the blower meet practical application requirements:
1、 Selection precautions
1. Flow and boost matching:
Flow rate: When selecting a blower, the flow rate of the blower should be determined according to the system design requirements to match the capacity of other equipment in the system. Considering the air leakage loss and the necessary flow margin, the flow rate of the blower is generally 1.1-1.25 times the required flow rate of the system. If the flow rate changes during the production process, the selection should be based on the flow rate.
Boosting: The boosting of Roots blower should be balanced with the pressure drop of the system it is in. When determining the pressure rise of the blower, there should be a margin of 1.05 to 1.15 times the system pressure drop. If the system pressure drop frequently changes during the production process, the pressure drop should be used as the basis to determine the boost of the fan.
2. Model and Performance Selection:
Applicability: In addition to meeting the requirements for pressure and flow rate, the reliability of product use should also be considered, such as corrosion resistance, wear resistance, and sealing performance.
Economy: Among the various available models, the selection should be based on requirements such as energy efficiency, high quality and low cost, or focus on one of these requirements.
Structure and transmission mode: Choose direct transmission or belt transmission according to specific needs, as well as dense complete sets of units or ordinary grouping methods.
2、 Precautions for operation and maintenance
1. Pre operation inspection:
Check if the foundation bolts are tightened and if the base is tilted.
Check if the piping has applied unnecessary loads to the blower, if there are impurities mixed in, if the piping is incorrect, and if all valves are open.
Confirm if the screw locking and check valve are properly opened.
Check if the lubricating oil reaches the red dot on the oil label. If there is too much, it will be automatically discharged.
2. Precautions during startup:
Rotate by hand to confirm that there are no abnormal phenomena before starting.
Run without load for 20 minutes and check for any abnormal sounds or heating.
Pay attention to the direction of rotation, it should be left rotation when viewed from the pulley side.
Pay special attention to abnormal sounds, heating, vibration, current values, and other items.
3. Precautions during operation:
Regularly check and record parameters such as power supply, voltage, current value, pressure, atmospheric temperature, discharge temperature, bearing temperature, vibration, noise, oil level, dirt level, belt tension, etc.
When adjusting the air volume, the method of changing the rotation number and discharging the atmosphere should be used instead of using an outlet gate valve.
4. Regular maintenance:
Check pressure, noise, and vibration daily.
Add lubricating oil and butter every month, and clean the filter screen.
Replace lubricating oil and inspect belts every 6 months.
Replace the belt and filter screen annually.
Replace bearings and inspect impellers and gears every two years.
3、 Other precautions
1. Material compatibility:
Select appropriate materials based on the properties of the transported gas to avoid adverse reactions between the gas and the material. For example, when transporting nitrogen gas, copper materials should not be used for the parts in contact with it; When transporting oxygen and chlorine gas, aluminum alloy materials should not be used for the parts in contact with them.
2. Sealing performance:
Select the appropriate sealing type according to different media and working conditions to ensure the sealing performance of the fan.
3. Motor selection:
Select the appropriate motor power based on parameters such as air volume, air pressure, and speed of the fan to ensure its normal operation and efficiency.
In summary, when selecting a Roots blower for gypsum powder pneumatic conveying, multiple aspects such as selection, operation, and maintenance need to be considered and carefully operated to ensure that the performance, efficiency, and performance of the blower meet practical application requirements.
