Roots blowers are widely used in various industrial fields due to their characteristics of high flow rate, stable conveying, and wear resistance. The following are the core industries and typical scenarios where Roots blowers are most commonly used, sorted by frequency of use and demand:
---
**1. Wastewater treatment industry (application areas)**
-* * Purpose * *:
**Aeration oxygen supply * *: Provides oxygen for microorganisms in activated sludge process and SBR process (requiring anti-corrosion design).
**Sludge transportation * *: Pressurize and transport settled sludge to dewatering equipment.
-* * Features * *:
-Common flow rate: 10-200 m3/min, pressure 49-78 kPa.
-Material requirements: Stainless steel (SS304/316) or epoxy coating to prevent sewage corrosion.
-Market share: approximately 35-40% of the total demand for Roots blowers.
---
**2. Power industry (mainly coal-fired power plants)**
-* * Purpose * *:
**Pneumatic ash conveying: Transport fly ash from the electrostatic precipitator to the ash silo (wear-resistant design, pressure 58-88 kPa).
**Desulfurization oxidation: Forcefully blowing air into the desulfurization tower to promote the oxidation of calcium sulfite to gypsum.
**Flue gas recirculation * *: reduces NOx emissions from boilers (high-temperature resistant type).
-* * Features * *:
-High voltage type has a high demand (dual stage series can reach 98 kPa or more).
-Explosion proof requirements (Ex d Ⅱ BT4 certification is required for dust environments).
---
**3. Chemical and petroleum industries**
-* * Purpose * *:
**Pneumatic conveying * *: Particle materials such as PVC powder, fertilizer, coal powder, etc. (explosion-proof design).
**Gas supply for reaction kettle * *: transportation of process gases such as chlorine and nitrogen (with mechanical seals to prevent leakage).
**Exhaust gas recovery: such as oil and gas recovery systems (requiring anti-static treatment).
-* * Features * *:
-Special materials: corrosion-resistant materials such as stainless steel 316L and titanium alloy.
-High sealing performance: Double end mechanical seal or dry gas seal.
---
**4. Metallurgical and Foundry Industry**
-* * Purpose * *:
**Blast furnace coal injection * *: replaces coke by injecting coal powder (high-pressure type, 98-120 kPa).
**Smelting and degassing: aluminum liquid dehydrogenation, ladle refining (requiring high temperature resistance design).
**Sintering machine air supply * *: Cooling and blowing air for sintered ore.
-* * Features * *:
-High temperature condition: The shell needs to be water-cooled or made of heat-resistant cast iron (HT250).
-Wear resistant treatment: The impeller is sprayed with tungsten carbide or ceramic coating.
---
**5. Food and pharmaceutical industry**
-* * Purpose * *:
**Fermentation oxygen supply: beer, soy sauce, fermentation (oil-free design, air filter accuracy ≤ 0.1 μ m).
**Vacuum packaging: Food and drug packaging (maximum vacuum -80 kPa).
**Material conveying: Pneumatic conveying of food grade materials such as flour and milk powder.
-* * Features * *:
-Sanitary standards: Compliant with FDA or GMP requirements, made of stainless steel 316L.
-Low noise: Dense design (≤ 75dB).
---
**6. Other high-frequency application scenarios**
|* * Industry * * | * * Purpose * * | * * Special Requirements * *|
|----------------|----------------------------|---------------------------|
|* * Papermaking * * | Pulp bleaching gas supply, waste paper recycling | Chlorine gas corrosion resistance (titanium alloy rotor)|
|* * Cement * * | Raw material homogenization silo fluidization, coal powder conveying | Wear resistant impeller (hardness C ≥ 60)|
|Aquaculture * * | Fish pond oxygenation | Energy saving variable frequency control, IP55 protection|
|* * Electronics * * | PCB board drying, clean room air supply | dust-free and oil-free air (with precision filtration installed)|
---
**Regional distribution hotspots**
1. * * China * *:
-Yangtze River Delta/Pearl River Delta (concentrated in sewage treatment and electronic factories).
-Shanxi/Inner Mongolia (coal-fired power plants, coal mines).
2. * * Southeast Asia * *:
-Vietnam/Thailand (new sewage treatment plants, food processing plants).
3. * * Europe and America * *:
-The United States (mainly in the chemical and high-end manufacturing industries).
---
**Selection Trend**
-Energy saving: Frequency conversion control accounts for over 60% (especially in the sewage treatment industry).
-Intelligent: Install IoT sensors to remotely monitor pressure and temperature.
-* * Modular * *: Quick disassembly design reduces maintenance time (such as replacing the entire gearbox).
---
**Summary**
The fields of Roots blower usage are: * * sewage treatment>electricity>chemical industry>metallurgy>food * *. When choosing, it is important to pay special attention to:
1. * * Medium characteristics * * (corrosiveness, dust content).
2. * * Pressure demand * * (single-stage/two-stage).
3. * * Industry compliance * * (explosion-proof, food grade certification, etc.).
If specific scenario model recommendations are needed (such as parameters of a three blade Roots blower for sewage treatment), further details on operating conditions can be provided.
