The following is a detailed technical analysis and application guide for the 2.2kW Roots blower, covering core parameters, selection points, and typical application scenarios:
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**1、 Basic technical parameters**
|* * Parameter Category * * | * * Standard Indicator * * | * * High Voltage Enhanced Version * * | * * Remarks * *|
|--------------------|--------------------|--------------------|-----------------------|
|* * Rated power * * | 2.2kW (3HP) | 2.2kW | 4-pole motor (1450rpm)|
|* * Flow range * * | 1.2-5.5m3/min | 0.8-4.2m3/min | Standard operating conditions (20 ℃, 101.3kPa)|
|* * Work pressure * * | 9.8-39.2kPa | 39.2-58.8kPa | High pressure version requires special sealing|
|* * Inlet and outlet diameter * * | DN40-DN50 | DN40 (thickened flange) | 1.5 "-2" flange standard|
|* * Noise level * * | 68-75dB (A) | 72-78dB (A) | Measured at a distance of 1m from the equipment|
|* * Equipment weight * * | 45-65kg | 55-80kg | Cast iron body|
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**2、 Core structural characteristics**
1. * * Compact design**
-Three bladed twisted rotor (involute profile, clearance 0.1-0.2mm)
-Integrated gearbox (oil bath lubrication, maintenance free design)
-Modular seal (mechanical seal/labyrinth seal optional)
2. * * Transmission system configuration**
```mermaid
graph LR
A [YE3 motor] -->| Coupling direct connection | B [Synchronous gear]
B -->C [rotor system]
C -->D [Pressure Buffer Chamber]
```
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**3、 Typical application scenarios**
1. * * Small scale sewage treatment**
-* * Applicable scale * *: 50-200m3/d processing capacity
-Aeration configuration:
-Micro porous aeration tube: Φ 10mm × 20m
-Dissolved oxygen efficiency: ≥ 2.2kgO/kWh
2. * * Aquaculture**
-Pond area: 0.5-2 acres (water depth 1-1.5 meters)
-Oxygenation Capacity: Maintaining 5-8mg/L dissolved oxygen (24-hour operation)
3. * * Pneumatic conveying**
-* * Conveying materials * *: particles ≤ 2mm (such as feed, plastic particles)
-* * Conveying distance * *: Horizontal ≤ 50m, vertical ≤ 15m
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**4、 Selection Calculation Example**
**Case: Small fish pond oxygenation**
-* * Requirement Conditions * *:
-Water volume: 1000m3
-Target dissolved oxygen: 6mg/L (initial 2mg/L)
-Aeration time: 8 hours
-* * Calculation process * *:
1. Oxygen demand=1000 × (6-2) × 1.2=4800gO
2. Fan oxygen supply capacity=2.2kW × 2.2kgO/kWh × 8h=38.72kgO
3. * * Conclusion * *: Satisfy demand (surplus 806)
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**5、 Energy efficiency optimization plan**
|* * Optimization measures * * | * * Energy saving effect * * | * * Implementation cost * *|
|--------------------|-------------------|-------------------|
|Ordinary frequency conversion control | 15-20 | Low (about 2000 yuan)|
|Permanent magnet synchronous motor | 25-30 | Medium (about 5000 yuan)|
|Intelligent DO linkage system | 30-40 | High (about 10000 yuan)|
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**6、 Maintenance points**
1. * * Daily Inspection Checklist**
-Oil level: Keep at 1/2-2/3 of the viewing window
-Vibration value: ≤ 4.0mm/s (handheld vibration meter)
-Inlet filter: pressure difference ≤ 300Pa
2. * * Regular maintenance**
|Project | Cycle | Standard|
|---------------|--------|-----------------------|
|Lubricating oil replacement | 2000h | ISO VG68|
|Belt adjustment | 500h | Deflection 8-10mm (if belt driven)|
|Rotor clearance detection | 1 year | feeler gauge measurement (cold state 0.15mm)|
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**7、 Quick diagnosis of faults**
|* * Fault phenomenon * * | * * Possible cause * * | * * Solution * *|
|----------------|-----------------------|-----------------------|
|Motor overheating | unstable voltage/overpressure operation | check the power grid+pressure gauge|
|Flow rate decrease | filter blockage/pipeline leakage | clean filter element+air tightness testing|
|Abnormal noise | Bearing wear/rotor rubbing | Shutdown inspection+clearance adjustment|
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**8、 Comparison of mainstream models in the market**
|* * Brand * * | * * Model * * | * * Pressure * * | * * Features * * | * * Reference Price * *|
|------------|------------|-------------|-----------------------|-------------|
|| -22 | 39.2kPa | Silent design (≤ 70dB) | 4500-6000 yuan|
|BG-2.2 | 58.8kPa | Anti corrosion coating | 5500-7500 yuan|
|| CF-2.2G | 49kPa | Integrated frequency converter | 6500-9000 yuan|
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**9、 Selection suggestions**
1. * * Conventional aeration * *: Choose the standard type (such as -22)
2. * * Dusty gas * *: optional cyclone separator+wear-resistant coating
3. * * Corrosive environment * *: Designated stainless steel material (+30 cost)
**Precautions * *:
It is strictly prohibited to exceed the working pressure on the nameplate
After the first 50 hours of operation, the anchor bolts need to be tightened
Winter shutdown to drain condensate water (anti freeze cracking)
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The 2.2kW Roots blower, with its compact structure, low maintenance cost, and stable flow output, has become an ideal choice for small environmental protection equipment and breeding farms. When selecting, special attention should be paid to the matching of actual working pressure and flow rate. It is recommended to prioritize selecting models with variable frequency control to achieve energy efficiency performance.
