Description
DAGYEE Submersible Mixer for Sludge Holding Tanks & Digesters – Preventing Settling & Maintaining Uniform Sludge
A submersible mixer for sludge holding tanks and digesters is a specialized mixing device designed to handle the unique challenges of sludge storage and processing. Sludge is thick, abrasive, and prone to settling. Without proper mixing, solids accumulate at the tank bottom, causing storage capacity loss, inconsistent feed to dewatering equipment, and operational problems.
DAGYEE sludge mixers are built with heavy-duty components to handle the demanding conditions of sludge applications. The high-torque design ensures reliable operation even with thick, viscous sludge. The mixer operates continuously or intermittently to maintain uniform sludge consistency throughout the tank.
These mixers are essential for maintaining homogeneous sludge in holding tanks, blending different sludge streams, and providing uniform feed to dewatering equipment such as belt presses, centrifuges, and screw presses. Proper mixing also prevents the formation of floating scum layers and reduces odour issues.
Submersible Mixers principle
The Process Flow:
Step 1: Submersion
The mixer is fully submerged in the sludge, typically suspended from a guide rail system. The heavy-duty design ensures reliable operation in thick, abrasive sludge.
Step 2: Low-Speed Rotation
The high-torque motor drives the propeller at low speed, creating gentle but powerful flow that moves through the entire tank volume. The low speed minimizes shear on sludge flocs.
Step 3: Flow Creation
The rotating propeller draws sludge from the front and discharges it in a directed stream. The flow pattern is designed to lift settled solids from the tank bottom and circulate them throughout the tank.
Step 4: Circulation
The flow continues through the tank, preventing dead zones and ensuring uniform sludge consistency. The circulation pattern maintains solids in suspension and prevents stratification.
Step 5: Homogenization
The mixing action blends different sludge streams and maintains uniform solids concentration throughout the tank, ensuring consistent feed to dewatering equipment.
Submersible Mixers Parameter
| Model | Power (kW) | Current (A) | Rotary Speed (rpm) | Impeller Diameter (mm) | Force (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| SMB0.85/8-260/3-740/C/S | 0.85 | 3.4 | 740 | 260 | 163 | 55/58 |
| SMB1.5/6-260/3-980/C/S | 1.5 | 4.4 | 980 | 260 | 290 | 55/58 |
| SMB2.2/8-320/3-740/C/S | 2.2 | 5.9 | 740 | 320 | 582 | 74/77 |
| SMB4/6-320/3-980/C/S | 4.0 | 10.8 | 980 | 320 | 609 | 74/77 |
| SMB1.5/8-400/3-740/S | 1.5 | 5.6 | 740 | 400 | 382 | 76/80 |
| SMB2.5/8-400/3-740/S | 2.5 | 7.3 | 740 | 400 | 575 | 76/80 |
| SMB3/8-400/3-740/S | 3.0 | 8.6 | 740 | 400 | 642 | 78/82 |
| SMB4/6-400/3-980/S | 4.0 | 10.3 | 980 | 400 | 1010 | 80/84 |
| SMB4/12-620/3-480/S | 4.0 | 14.0 | 480 | 620 | 1230 | 240/245 |
| SMB5/12-620/3-480/S | 5.0 | 18.2 | 480 | 620 | 1420 | 240/245 |
| SMB7.5/12-620/3-480/S | 7.5 | 28.0 | 480 | 620 | 1963 | 255/270 |
| SMB10/12-620/3-480/S | 10.0 | 32.0 | 480 | 620 | 2361 | 255/270 |
This explosion-proof submersible mixer is exclusively suitable for high-risk industrial scenarios such as petrochemical plants, oil refineries, natural gas enterprises and coal chemical factories, targeting flammable, volatile and oil-containing wastewater treatment. It solves the defect of high energy consumption of traditional explosion-proof mixing equipment, equipped with high-efficiency energy-saving explosion-proof motor, which reduces invalid power consumption on the premise of meeting industrial explosion-proof safety standards. It is the only safe and energy-saving preferred stirring equipment for special dangerous sewage treatment projects, perfectly balancing safety performance and operating cost control.
Submersible Mixers Installation Method
Step-by-Step Installation:
1. Marking the Location
The mounting position is marked on the tank wall, ensuring correct alignment and clearance.
2. Installing Wall Brackets
Wall brackets are bolted or welded to the tank wall at specified intervals.
3. Mounting Guide Rails
The guide rails are attached to the wall brackets and secured with bolts. The rails are aligned vertically and checked for plumb.
4. Installing Floor Anchor
The floor anchor is bolted to the tank floor or embedded in concrete.
5. Attaching Guide Shoe
The guide shoe is attached to the submersible mixer using the provided mounting hardware.
6. Assembling Lifting System
The lifting chain is attached to the mixer and threaded through the hoist above the tank.
7. Installing Hoist
The hoist is mounted above the tank on a support structure.
8. Testing
The mixer is lowered and raised along the guide rails to ensure smooth operation.
Submersible Mixers Factor
- Selection Factor: Strictly select matching explosion-proof grade and power model according to project hazard level, sewage flammability and tank volume parameters.
- Operation Factor: Prohibit frequent start-stop and overload operation, keep standard diving depth to avoid idle running and spark hidden dangers.
- Safety Factor: Regularly detect explosion-proof sealing performance and electrical isolation structure to eliminate potential safety hazards in dangerous working conditions.
- Maintenance Factor: Professional staff must conduct regular inspection, replace aging explosion-proof accessories regularly to maintain long-term safety performance.
Submersible Mixers Features
High-Torque Motor
The motor provides high torque at low speed, ensuring reliable operation even with thick, viscous sludge.
Heavy-Duty Construction
All components are built for the abrasive conditions of sludge applications, with wear-resistant materials and robust design.
Self-Cleaning Propeller
The backward-swept propeller geometry prevents debris entanglement and reduces maintenance requirements.
Three-Chamber Sealing
A robust sealing system with pre-chamber, gear chamber, and sealing chamber provides protection against water and sludge ingress.
IP68 Protection
Fully submersible design suitable for continuous operation at depths up to 20 meters.
Guide Rail System
The unit can be installed and retrieved using guide rails without draining the tank.
Variable Speed Options
Some models offer variable speed control for different operating conditions.
Optional Heating
For cold climates, optional heating elements protect the motor and seals during cold start-ups.
Submersible Mixers Application
Sludge Holding Tanks
Maintains uniform sludge consistency before dewatering. Prevents solids accumulation and ensures consistent feed to belt presses, centrifuges, and screw presses.
Sludge Blending Tanks
Mixes primary sludge, secondary sludge, and chemical sludges to create a uniform blend for dewatering or digestion.
Anaerobic Digesters
Provides gentle mixing to maintain uniform conditions and prevent stratification in digesters. Some digesters use intermittent mixing to allow biological activity.
Sludge Storage Tanks
Maintains sludge in suspension during storage periods, preventing settling and reducing odour issues.
Thickener Feed Tanks
Maintains uniform feed to gravity thickeners or DAF thickeners, improving thickening performance.
Dewatering Feed Tanks
Provides consistent feed to dewatering equipment, reducing polymer consumption and improving cake dryness.
Why Choose DAGYEE Low-Speed Flow Generator?
| Feature | Customer Value |
|---|---|
| Energy Efficiency | Low-speed, high-thrust design reduces energy consumption by up to 50% compared to conventional mixers |
| Self-Cleaning Propeller | Backward-swept design prevents debris entanglement and clogging |
| Reliable Sealing | Double mechanical seals and 3-chamber system ensure long-term reliability |
| IP68 Submersible | Fully submersible, suitable for depths up to 20 m |
| Gentle Circulation | Low-speed operation preserves biological floc structure |
| Guide Rail System | Easy installation and retrieval without draining the tank |
| Corrosion Resistant | Stainless steel or composite materials for long service life |
| Temperature Monitoring | Motor protection for reliable continuous operation |
Supplier Information
DAGYEE submersible mixers for sludge holding tanks and digesters provide reliable, low-maintenance mixing for the most demanding sludge applications. Designed with heavy-duty components and high-torque motors, they prevent settling, maintain uniform sludge, and ensure consistent feed to dewatering equipment.
Contact our team for a free consultation and mixer selection for your sludge application.
