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Maintain stable fiber suspension, eliminate sedimentation, and reduce mixing energy consumption with Keheng heavy-duty side-entry agitators engineered specifically for pulp and paper processing.
Up to 32% lower energy consumption
Superior axial flow circulation
Reduced fiber stratification and dead zones
Zero-drain maintenance system
Optimized for low-shear pulp mixing
In pulp and paper production, maintaining uniform stock consistency is critical for stable sheet formation and downstream process control. However, different pulp consistencies create completely different mixing challenges.
Low-consistency pulp behaves similarly to water, but fibers settle rapidly once circulation velocity decreases.
Fiber sedimentation
Uneven stock consistency
Bottom sludge accumulation
Flow channeling inside large tanks
Higher consistency pulp exhibits non-Newtonian flow behavior, generating severe circulation resistance and stagnation zones.
Cavern effect around the impeller
Poor bulk circulation
Large dead zones
Excessive torque demand
Increased energy consumption
Traditional top-entry mixers often struggle to maintain effective circulation inside large stock chests due to structural interference and inefficient flow patterns.
Keheng Side-Entry Industrial Mixers are engineered to inject high axial flow directly into high-risk sedimentation areas near the tank bottom, ensuring continuous fiber suspension with lower operating power.
Rapidly blends multiple pulp streams and chemical additives before paper machine feeding.
Faster homogenization
Stable stock consistency
Improved additive distribution
Reduced mixing time
Prevents fiber settling and core-flow channeling in high-volume storage tanks.
Continuous pulp circulation
Uniform consistency output
Reduced sediment buildup
Improved downstream stability
Efficiently re-slurries dry broke and trim paper without damaging fiber structure.
Faster broke recovery
Improved pumpability
Lower fiber degradation
Reduced downtime
Keeps fine fibers and fillers suspended while preventing sediment accumulation.
Improved fiber recovery
Reduced pipeline blockage
Cleaner circulation systems
Better process efficiency
Maintains temperature uniformity while preventing heavy sludge deposition.
Stable chemical circulation
Reduced bottom deposits
Improved thermal uniformity
Lower maintenance frequency
Unlike conventional high-shear propellers, Keheng hydrofoil impellers generate powerful axial flow with significantly lower energy consumption.
Maximum circulation efficiency
Lower shear force on fibers
Reduced power demand
Improved suspension performance
One of the biggest operational issues in side-entry mixing systems is seal wear caused by abrasive pulp fibers.
Keheng integrates a proprietary retractable shut-off device that allows seal replacement without draining the tank.
No tank draining required
Maintenance completed within 1 hour
Eliminates pulp loss during servicing
Reduces shutdown costs dramatically
Feature | Standard Mixers | Keheng Side-Entry Mixers |
|---|---|---|
Impeller Type | Standard Pitch Propeller | Hydrofoil Axial Flow Impeller |
Energy Consumption | Baseline | 15%–22% Lower |
Seal System | Packed Gland | Heavy-Duty Mechanical Seal |
Maintenance | Full Tank Draining Required | Zero-Drain Maintenance |
Downtime | 24–48 Hours | Approximately 1 Hour |
Drive System | Belt / Direct Drive | Helical Gear Reducer |
Transmission Efficiency | Standard | >98% |
A packaging paper mill in Southeast Asia experienced severe fiber stratification inside a 450 m³ blending chest.
Their existing top-entry mixer:
Consumed 55 kW power
Created a 1.2-meter sediment layer
Caused frequent stock consistency fluctuations
Required manual cleaning shutdowns
After analyzing:
Stock rheology
Tank geometry
Circulation requirements
Fiber suspension behavior
Keheng engineered a customized 37 kW Side-Entry Hydrofoil Agitator installed at an optimized offset angle.
Metric | Before | After Keheng |
|---|---|---|
Motor Power | 55 kW | 37 kW |
Consistency Variation | ±0.4% | < ±0.05% |
Sediment Layer | 1.2 m | Eliminated |
Annual Shutdown | 2 Days | 0 |
The upgraded system delivered:
Stable stock consistency
Improved process reliability
Lower maintenance costs
Reduced energy consumption
Elimination of manual sediment cleaning
Every pulp chest requires customized flow calculations based on actual process conditions.
Tank diameter
Liquid level height
Pulp consistency (% BD)
Fiber type
Temperature
Tank geometry
Required circulation target
Process stage
Traditional radial-flow impellers generate turbulence but often fail to create large-scale circulation inside pulp storage tanks.
Keheng hydrofoil impellers generate strong axial flow patterns that:
Increase effective circulation volume
Reduce dead zones
Maintain continuous suspension
Lower mixing power requirements
This is especially important in:
large pulp towers
machine chests
recycled fiber systems
high-consistency stock applications
Side-entry mixers create strong horizontal circulation near the tank bottom, preventing fiber sedimentation and improving stock uniformity in large-volume tanks.
Hydrofoil impellers generate high axial flow with lower shear force, reducing fiber damage while lowering energy consumption.
Yes. Properly engineered side-entry agitators can effectively mix medium and high-consistency pulp when equipped with optimized impeller geometry and torque capacity.
Proper impeller positioning, axial flow design, and circulation velocity calculations are critical for eliminating dead zones and maintaining full fiber suspension.
Keheng engineering team can provide:
Process calculation
Mixer sizing
Power recommendation
CFD flow analysis
Impeller selection
Tank layout optimization
Send us your tank drawing and process data to receive a customized side-entry mixing solution for your pulp and paper application.
