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Agitators
Tengyu Brand
Key Features of Industrial Nitric Acid Agitator for Phosphoric Acid Purification, 85% Efficiency
——————Professional Manufacturer for Agitators for more than 40 years & rich experience in cooperation with Design Institue
Product Overview:
For the agitators in the 50,000 ton/year nitric acid method for purifying phosphoric acid (85%), its design must meet the core requirements of strong corrosion, high viscosity, solid-liquid mixing and process stability. The following are the key features and selection points:
Structural design
Blade type:
Swept blade (high efficiency and low shear, suitable for a wide range of viscosities)
Propulsion/turbine combination (taking into account both suspension and mixing efficiency)
Shaft stability: Long-axis design requires **multi-layer support bearings** (intermediate bearings are made of SiC material) to prevent vibration deviation.
Sealing system: Double-end mechanical seal + buffer system (such as glycerol pressurization) to eliminate leakage risks.
Process adaptability
Anti-crystal deposition: The blade edge is designed with sharp angles, and the bottom is close to the bottom of the kettle (gap ≤50mm) to prevent crystal accumulation.
Shear control: Optimize the blade speed (usually linear speed 2~5m/s) to avoid excessive crystal crushing and affect subsequent filtration.
Multi-layer stirring: main paddle (bottom layer suspension) + auxiliary paddle (upper layer vortex elimination) to ensure uniformity throughout the kettle.
Drive and power
Motor power: calculated according to viscosity (85% H₃PO₄ viscosity is about 30-50cP), 50,000-ton reactors are often equipped with 55~90kW variable frequency motors.
Reducer: Hardened helical gear reducer, output torque ≥50kN·m, suitable for high-load start and stop.
Response to special working conditions
Fluoride corrosion: When the medium contains HF, the fluorine resistance of the material needs to be verified (such as zirconium alloy is stable under HF<200ppm).
High temperature corrosion: When the operating temperature is 60~80℃, C-276 is better than stainless steel; zirconium alloy is required when it exceeds 90℃.
Solid particles: If it contains filter aids such as diatomaceous earth, a tungsten carbide wear-resistant layer needs to be welded on the leading edge of the blade.
Key Features of Industrial Nitric Acid Agitator for Phosphoric Acid Purification, 85% Efficiency
——————Professional Manufacturer for Agitators for more than 40 years & rich experience in cooperation with Design Institue
Product Overview:
For the agitators in the 50,000 ton/year nitric acid method for purifying phosphoric acid (85%), its design must meet the core requirements of strong corrosion, high viscosity, solid-liquid mixing and process stability. The following are the key features and selection points:
Structural design
Blade type:
Swept blade (high efficiency and low shear, suitable for a wide range of viscosities)
Propulsion/turbine combination (taking into account both suspension and mixing efficiency)
Shaft stability: Long-axis design requires **multi-layer support bearings** (intermediate bearings are made of SiC material) to prevent vibration deviation.
Sealing system: Double-end mechanical seal + buffer system (such as glycerol pressurization) to eliminate leakage risks.
Process adaptability
Anti-crystal deposition: The blade edge is designed with sharp angles, and the bottom is close to the bottom of the kettle (gap ≤50mm) to prevent crystal accumulation.
Shear control: Optimize the blade speed (usually linear speed 2~5m/s) to avoid excessive crystal crushing and affect subsequent filtration.
Multi-layer stirring: main paddle (bottom layer suspension) + auxiliary paddle (upper layer vortex elimination) to ensure uniformity throughout the kettle.
Drive and power
Motor power: calculated according to viscosity (85% H₃PO₄ viscosity is about 30-50cP), 50,000-ton reactors are often equipped with 55~90kW variable frequency motors.
Reducer: Hardened helical gear reducer, output torque ≥50kN·m, suitable for high-load start and stop.
Response to special working conditions
Fluoride corrosion: When the medium contains HF, the fluorine resistance of the material needs to be verified (such as zirconium alloy is stable under HF<200ppm).
High temperature corrosion: When the operating temperature is 60~80℃, C-276 is better than stainless steel; zirconium alloy is required when it exceeds 90℃.
Solid particles: If it contains filter aids such as diatomaceous earth, a tungsten carbide wear-resistant layer needs to be welded on the leading edge of the blade.
