Roots blower is a type of volumetric gas conveying equipment that uses rotor mechanical compression to forcibly transport gas. Its core features are stable flow rate and controllable pressure. The following are its main functions and typical application scenarios:
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**1、 Core role**
1. * * Forced air supply**
-Provide stable airflow to overcome pipeline resistance or liquid level pressure (such as aeration towards the bottom of the sewage tank).
2. * * Pneumatic conveying**
-Promote the flow of powder and granular materials (such as cement and grain) in pipelines.
3. * * Vacuum assisted**
-When connected in reverse, gas can be drawn to create a low vacuum environment (such as vacuum packaging).
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**2、 Five typical applications**
|* * Industry * * | * * Purpose * * | * * Working principle diagram * *|
|------------------|-------------------------------------------------------------------------|--------------------------|
|* * Sewage treatment * * | Aeration and oxygenation (microbial decomposition of organic matter), sludge agitation | [Figure: Gas → Biochemical tank]|
|Aquaculture * * | Fish pond oxygenation to increase dissolved oxygen in water | [Image: Gas → Fish pond bottom]|
|* * Pneumatic Conveying * * | Conveying Dry Materials such as Cement and Plastic Particles | [Diagram: Fan → Pipeline → Storage Bin]|
|* * Chemical/Metallurgical * * | Transport process gases such as coal gas and hydrogen, and supply combustion or reaction gases | [Diagram: Gas → Reactor]|
|* * Vacuum System * * | Cooperate with the front-end pump to evacuate (such as food packaging, electronic component adsorption) | [Diagram: Fan → Vacuum Chamber]|
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**3、 Unique advantages**
1. * * Constant traffic**
-When the speed remains constant, the air volume is almost unaffected by pressure (centrifugal fan air volume will fluctuate with pressure).
2. * * Simple structure**
-No internal compression, low failure rate, easy maintenance (compared to screw fans).
3. * * Resistant to dirt and moisture**
-Can transport gases containing a small amount of dust or humidity (requires filter).
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**4、 Difference from centrifugal fan**
|* * Features * * | * Roots blower * * | * * Centrifugal fan * *|
|----------------|----------------------------|----------------------------|
|* * Working principle * * | Volumetric (mechanical extrusion) | Kinetic (centrifugal force)|
|* * Pressure range * * | Medium low pressure (≤ 98kPa) | Low pressure (≤ 50kPa)|
|* * Flow regulation * * | Variable frequency or bypass valve required | Valve can be directly used for regulation|
|* * Applicable scenarios * * | High pressure air supply requiring stable flow | High flow ventilation and air exchange|
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**5、 Key parameters for selection**
1. * * Airflow * * (m3/min): Calculated according to process requirements (such as wastewater treatment based on gas water ratio).
2. * * Pressure * * (kPa): Overcome pipeline resistance+liquid level height (e.g. water depth of 5m needs to be ≥ 49kPa).
3. * * Medium * *: Corrosive gases require stainless steel material, and high-temperature gases require cooling design.
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**6、 Precautions**
-Overloading operation is strictly prohibited: Pressure is determined by system resistance, and overpressure can burn out the motor.
-* * Regular maintenance * *: Replace gear oil and clean intake filter every 2000 hours.
If you need to select for specific scenarios (such as "electroplating tank stirring"), you can provide detailed parameters (air volume, pressure, gas properties), and I will recommend matching models!
