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Agitators
Tengyu Brand
The Wet Process Phosphoric Acid Agitator is a heavy-duty top-entry mixing unit designed for slurry agitation in the dihydrate process of wet-process phosphoric acid (WPA) production. It is engineered for a 5700 × 5700 × 6770 mm flat-bottom square tank, where effective solid-liquid mixing and continuous slurry movement are important for stable process operation.
The agitator performs several essential functions, including WPA slurry mixing, blending of reacting components, prevention of gypsum sedimentation, and maintenance of uniform temperature, concentration, and solids distribution throughout the tank.
To meet the demands of corrosive and high-solids-content slurry service, the equipment incorporates super duplex stainless steel wetted components, a heavy-duty drive system, and dual-stage impellers.
With a 110 kW motor, 48 rpm agitation speed, and a rated torque of 63,667 N·m, this agitator is configured for continuous heavy-duty operation in phosphoric acid processing applications.
Wet-process phosphoric acid production involves slurry containing reacting components and suspended solid particles. Maintaining sufficient fluid movement is important for limiting stagnant areas and achieving consistent mixing conditions.
The Dihydrate WPA Agitator provides intensive agitation within the reaction tank to promote the movement and distribution of slurry components.
Its top-entry configuration and dual-stage impeller arrangement are designed to support mixing throughout different regions of the tank.
The agitator uses two impeller stages, each with a diameter of 2500 mm.
The upper impeller promotes slurry circulation and homogenization in the upper region of the tank, while the lower impeller provides agitation near the tank bottom to help limit gypsum accumulation and solid settling.
This arrangement supports:
Mixing of reacting components in WPA production
Suspension and distribution of gypsum and other solid particles
Reduction of low-flow areas within the tank
Maintenance of uniform slurry concentration and temperature
Stable mixing conditions during the dihydrate process
The upper impeller is welded, while the lower impeller adopts a detachable, key-connected structure to facilitate maintenance and replacement.
Equipment used in wet-process phosphoric acid production must withstand corrosive process media and abrasion caused by suspended solids.
The agitator incorporates corrosion-resistant super duplex stainless steel in its wetted components.
The shaft is manufactured from 2507 duplex steel, while the dual-stage impellers use 1.4507 super duplex stainless steel.
These material selections are intended to provide resistance to corrosive WPA slurry and erosion associated with gypsum particles under the specified operating conditions.
The agitator is equipped with a WEG 110 kW industrial motor and a SUMITOMO DVD9085PSL-RLL-31/5 heavy-duty gear reducer.
The reducer is equipped with a cooling system and is selected for high-torque operation and the mechanical loads associated with slurry mixing.
The drive configuration operates at an agitator speed of 48 rpm, with a rated torque of 63,667 N·m and an allowable bending moment of 41,833 N·m.
This combination is designed to support continuous heavy-duty agitation in wet-process phosphoric acid production.
The agitator uses a liquid-type shaft seal to help control leakage risks associated with hot, corrosive process slurry.
A rigid, one-piece mounting base measuring 2250 × 1750 mm provides structural support for the drive and shaft assembly.
The mounting structure is designed to accommodate the specified static and dynamic loads, helping maintain stable mechanical operation under heavy-duty mixing conditions.
The following specifications describe the agitator configuration provided for the dihydrate WPA application.
| Parameter | Specification |
|---|---|
| Agitator Type | Heavy-Duty Top Entry Agitator |
| Application | Dihydrate WPA Slurry Mixing |
| Tank Dimensions | 5700 × 5700 × 6770 mm |
| Tank Configuration | Flat-Bottom Square Tank |
| Operating Temperature | 70–80°C |
| Design Temperature | 85°C |
| Working Pressure | Atmospheric |
| Medium Density | 1430–1500 kg/m³ |
| Medium Viscosity | 5–12 cP |
| Agitator Speed | 48 rpm |
| Impeller Tip Speed | 6.28 m/s |
| Motor Brand | WEG |
| Motor Power | 110 kW |
| Motor Specification | 4P, 380V / 50Hz |
| Motor Insulation | Class F |
| Motor Explosion Protection | Non-Explosion-Proof |
| Gear Reducer | SUMITOMO DVD9085PSL-RLL-31/5 |
| Reducer Configuration | Heavy-Duty, with Cooling System |
| Rated Torque | 63,667 N·m |
| Allowable Bending Moment | 41,833 N·m |
| Static Load | 8,287 kg |
| Dynamic Load | 16,574 kg |
| Shaft Seal | Liquid Seal Type |
| Shaft Dimensions | Φ356 × 20 mm |
| Shaft Length | 6,190 mm |
| Shaft Material | 2507 Duplex Steel |
| Impeller Configuration | Dual-Stage Impellers |
| Impeller Diameter | Φ2500 mm |
| Impeller Material | 1.4507 Super Duplex Stainless Steel |
| Upper Impeller Connection | Welded |
| Lower Impeller Connection | Key-Connected, Detachable |
| Mounting Base Dimensions | 2250 × 1750 mm |
The agitator is primarily designed for digestion and reaction tanks used in wet-process phosphoric acid production.
In these applications, the process slurry contains reacting materials and solid particles, including gypsum.
Continuous agitation promotes contact between reacting components and helps maintain a more uniform slurry mixture during the reaction process.
Gypsum particles may settle when slurry circulation is insufficient, particularly near the bottom of a process tank.
The lower impeller provides agitation in the lower tank region to help reduce sediment accumulation, while the upper impeller supports circulation and mixing throughout the vessel.
This arrangement is intended to improve solids distribution and reduce the formation of stagnant regions within the tank.
Uniform temperature, concentration, and solid distribution are important considerations in WPA slurry processing.
The agitator promotes movement and mixing of the slurry to help maintain consistent conditions throughout the reaction tank.
These functions support more stable crystallization conditions and process operation in the dihydrate phosphoric acid production system.
In addition to wet-process phosphoric acid production, the agitator design may be considered for other chemical processes involving corrosive media and high solids content.
Potential applications include operations requiring continuous solid-liquid mixing, anti-sedimentation, and medium homogenization.
Suitability for other processes should be evaluated according to actual operating conditions, material compatibility, tank configuration, and mechanical requirements.
Selecting an agitator for wet-process phosphoric acid production requires consideration of both process mixing requirements and mechanical operating conditions.
The slurry density, viscosity, temperature, and solids characteristics influence the mixing requirements.
The specified agitator is designed for medium densities of 1430–1500 kg/m³, viscosities of 5–12 cP, and operating temperatures of 70–80°C.
These parameters provide a reference for evaluating compatibility with the intended WPA process conditions.
Tank geometry affects the flow pattern and mixing distribution.
For the specified 5700 × 5700 × 6770 mm flat-bottom square tank, the agitator uses dual-stage impellers to provide mixing action in both the upper and lower regions.
The arrangement is intended to maintain slurry circulation while limiting solids accumulation near the tank bottom.
Corrosive slurry environments require appropriate wetted-part materials, while heavy-duty mixing places substantial loads on the agitator shaft, gearbox, and mounting structure.
The specified unit combines super duplex stainless steel wetted components with a heavy-duty drive system and a rigid mounting base.
These features address the material and mechanical requirements identified for this WPA slurry application.
TENGYU provides heavy-duty agitator equipment for demanding industrial mixing applications, including wet-process phosphoric acid slurry processing.
If you are evaluating an agitator for a dihydrate WPA reaction tank, please contact our team with your process requirements and tank information.
Our team can discuss the applicable agitator configuration, operating parameters, and technical requirements based on your project conditions.
Email: sales@chinatengyu.com
Phone: +86-137-7778-9498
