Roots blower (Roots blower) is widely used in the industrial field due to its simple structure, stable air volume, convenient maintenance, and strong adaptability. The following is a system classification and typical scenario description of its core application scope:
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**1、 Environmental Protection and Sewage Treatment**
1. * * Sewage aeration**
-Activated sludge process: Provides oxygen for processes such as A2O and SBR (air volume 5-100 m3/min, pressure 49-78 kPa).
-MBR membrane cleaning: backwash membrane components to prevent blockage.
2. * * Biogas treatment**
-Pressurized delivery of anaerobic fermented biogas to the generator set (requiring explosion-proof design).
3. * * Flue gas desulfurization**
-Transport oxidized air (made of corrosion-resistant stainless steel) to the desulfurization tower.
**Industry proportion: Environmental protection accounts for 35-40% of the total application of Roots blowers.
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**2、 Chemical and Petroleum**
1. * * Gas transportation**
-Transport of dangerous gases such as chlorine and hydrogen (requires PTFE sealing+Ex d explosion-proof motor).
2. * * Gas supply for reaction kettle**
-Oxidation reaction, fluidized bed gas flow power source (pressure 0.3~0.8 bar).
3. * * Vacuum assisted**
-Used in conjunction with a vacuum pump for crystallization and drying (vacuum degree -20~-50 kPa).
**Special requirements: Corrosive media require titanium alloy rotors, and flammable gases require ATEX certification.
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**3、 Mining and Metallurgy**
1. * * Gold Extraction**
-Oxygen is added to the cyanide leaching tank in the CIP/CIL process (with an air flow rate of 10-30 m3/min).
2. * * Flotation process**
-Provide bubble carrier for flotation machine (wear-resistant cast iron shell required).
3. Blast furnace injection**
-Coal powder conveying system (pressure 58.8-78.4 kPa).
**Case * *: A gold mine project uses 4 sets of -150 Roots blowers (15 m3/min, 58.8 kPa).
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**4、 Food and Medicine**
1. Fermentation oxygen supply**
-Beer yeast cultivation and fermentation (oil-free design, 304 stainless steel).
2. * * Powder transportation**
-Flour and milk powder pneumatic conveying (food grade lubricating grease).
3. * * Packaging inerting**
-Fill food packaging with nitrogen to replace oxygen (low pulsation type).
**Sanitary standard * *: Complies with FDA/GB 16798 requirements, with a surface roughness Ra ≤ 0.8 μ m.
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**5、 Electricity and Energy**
1. * * Biomass power generation**
-Pressurization of straw gasification gas (air volume 20-50 m3/min).
2. * * Garbage incineration**
-Combustion air supply (high temperature resistant design, ≤ 120 ℃).
3. * * Denitrification system**
-Ammonia dilution transportation (leak proof dual mechanical seal).
**Energy efficiency requirement: Equipped with IE4 motor, variable frequency control can save 15-30% energy.
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**6、 Aquaculture**
1. * * Oxygenation system**
-Aeration at the bottom of the fish pond (pressure 19.6-39.2 kPa, underwater aeration tube for noise reduction).
**Advantages * *:
-More adaptable to water level changes than centrifugal fans;
-3-5 times longer than the lifespan of vortex fans.
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**7、 Other industrial applications**
|* * Industry * * | * * Purpose * * | * * Parameter Example * *|
|----------------|-----------------------------|---------------------------|
|Building materials | Cement raw material conveying | Pressure 49 kPa, equipped with dust filter|
|Paper making | Pulp bleaching gas supply | Ozone transportation, 316 stainless steel shell|
|Electronics | PCB board drying | No oil wind, dew point ≤ -40 ℃|
|Automobile | Coating line airflow circulation | Explosion proof type, Ex IIB T4 |
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**8、 Selection taboo scenarios**
1. * * Ultra high voltage * *:> When the efficiency drops sharply at 98 kPa, a screw fan should be selected.
2. High viscosity gas: Gas containing oil mist and tar is prone to adhere to the rotor.
3. * * Temperature * *:<-20 ℃ or>120 ℃ requires special material/lubrication design.
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**9、 Market data reference**
-Global market size: approximately $280 million in 2023, with an annual growth rate of 5.2% (Grand View Research data).
-* * Mainstream Brands * *:
-Domestic: Changsheng;
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**Summary**
The core applications of Roots blowers can be summarized as follows:
**Low pressure constant flow gas supply (pressure<1 bar, flow rate 1-300 m3/min), covering 80% of industrial gas transportation needs. When selecting, special attention should be paid to the characteristics of the medium, pressure requirements, and environmental adaptability, and alternative solutions such as screw or centrifugal fans should be considered in high-pressure/high-precision scenarios.
