Description

Low Maintenance Sludge Dewatering Machine Wear Resistant Design For High Solids Loading Applications

1.Product Overview

The DAGYEE Low Maintenance Sludge Dewatering Machine is engineered for the most demanding applications where high solids loading, abrasive materials, and continuous operation would quickly destroy conventional dewatering equipment. Built with heavy-duty construction and advanced wear-resistant technology, this machine delivers exceptional reliability in mining, mineral processing, chemical, and other heavy industrial applications. The robust design extends component life by 2-3 times compared to standard machines, significantly reducing maintenance downtime and total cost of ownership.

2. Working Principle

The heavy-duty machine operates on a combination of mechanical compression and filtration:

1. Heavy-Duty Feed System: An oversized feed pump and large-diameter pipework handle high-solids sludge without plugging. A heavy-duty flocculation tank with reinforced mixing blades ensures thorough polymer mixing even with high concentrations.

2. Reinforced Dewatering Body: The screw body is constructed with thicker walls and heavier flanges. The rings (both fixed and moving) are manufactured from hardened stainless steel or with tungsten carbide coatings. The screw flights are clad with wear-resistant hardfacing on all wear surfaces.

3. High-Torque Drive System: A larger motor and heavy-duty gearbox provide the torque required to process high-solids sludge. VFD control allows precise speed adjustment for optimal performance.

4. Advanced Wear Protection: Critical wear areas are protected with:

• Tungsten carbide tiles on ring faces

• Hardfaced screw flights (carbide overlay)

• Ceramic-lined feed zones

• Replaceable wear liners in high-wear areas

3.Key Features

• Hardened Ring Material – Tungsten carbide coated rings for extended wear life

• Armored Screw Flights – Hardfacing or carbide inserts on all screw surfaces

• Reinforced Construction – Heavy-duty frames, bearings, and housings

• Modular Wear Components – Easily replaceable wear parts reduce downtime

• High-Torque Drive – Powerful motor and gearbox handle dense, abrasive sludge

• Oversized Bearings – Larger-than-standard bearings for long service life

• Low Maintenance Design – Extended service intervals with centralized lubrication

• Heavy-Duty Filter Rings – Thicker rings with hardened profiles

4. Technical Specifications

Standard models are listed below. Custom configurations are available upon request.

• Wear part life extended 2-3 times vs. standard machines

• Handles sludge with up to 40% solids concentration

• Processes abrasive materials (sand, grit, mineral fines) without excessive wear

• Reduced maintenance downtime (annual servicing vs. quarterly for standard units)

• Lower total cost of ownership over 5-10 year period

• Suitable for applications where grit and sand are present in sludge

• No filter belts or cloths to replace (reduced consumable cost)

• Standby capability for critical applications

Model	DS Capacity (kg/h)		Sludge Capacity (m³/h)			Power (kW)	Dimensions (mm)			Operating Weight (kg)
	Min	Max	2g/L	10g/L	20g/L		L	W	H
DL101	3	5	1.5	0.6	0.25	0.2	1816	756	1040	290
DL131	6	10	3.0	1.2	0.5	0.36	1969	756	1040	315
DL202	18	30	9.0	3.6	1.5	1.1	2930	1257	1470	1110
DL301	30	50	15.0	6.0	2.5	0.74	3255	985	1600	1320
DL302	60	100	30.0	12.0	5.0	1.1	3455	1295	1600	2230
DL352	120	200	60.0	24.0	10.0	6.0	4420	2100	2250	4850
DL403	180	300	90.0	36.0	15.0	6.0	4420	2100	2250	4850

Note: Capacity and cake dryness depend on sludge characteristics, polymer type, and dosage. A sludge test is recommended for accurate sizing.

Materials:

• Screw and rings – Stainless 304 (316L available for corrosive stuff)

• Housing – Stainless 304

• Frame – Carbon steel with epoxy coating

Cake solids: 15% to 30% depending on your sludge and chemical

Temperature range: 0°C to 60°C

Voltage: We match yours – 380V/50Hz, 460V/60Hz, or others

5. Comparison with Traditional Equipment

Each technology has appropriate applications. The selection depends on specific site requirements including sludge characteristics, available labor, energy costs, and budget constraints.

What this means for you:

• Want the driest cake possible? Get a centrifuge. But budget for power and repairs.

• Have almost no budget upfront? Get a belt press. But plan for labor and water.

• Want the lowest total cost and least headache? Get our screw press.

6. Selection & Maintenance

Selection Worksheet

To select the appropriate model, calculate your dry solids production rate.

Step 1: Measure or estimate your sludge flow rate in cubic meters per hour.

Step 2: Measure your inlet solids concentration in percent or grams per liter. One percent solids equals ten grams per liter.

Step 3: Calculate dry solids per hour: Flow rate × Solids concentration × 10 (for grams per liter to kilograms per hour).

Step 4: Multiply by 1.5 to provide margin for variations.

Step 5: Select a model with dry solids capacity exceeding this number.

Example Calculation

Sludge flow: 8 cubic meters per hour
Inlet solids: 2 percent (20 grams per liter)
Dry solids: 8 × 20 = 160 kilograms per hour
With margin: 160 × 1.5 = 240 kilograms per hour
Recommended model: DAG-301 or DAG-302 depending on flow characteristics

Free Laboratory Testing

DAGYEE maintains a pilot-scale test unit for customer sludge samples. The test procedure requires approximately five liters of representative sludge.

The test report includes:

• Achievable cake solids content

• Recommended polymer type and dosage

• Filtrate quality measurements

• Recommended model based on test results

There is no charge for this service. Shipping costs for the sample are the responsibility of the customer.

Maintenance Planning

The maintenance program for this equipment is substantially simpler than for belt presses or centrifuges.

Daily Tasks (Five Minutes)

• Visual check for any external leaks

• Listen for changes in operating sound

• Verify control panel shows normal status

Monthly Tasks (Thirty Minutes)

• Check gearbox oil level through sight glass

• Apply grease to motor bearings if equipped with fittings

• Inspect discharge area for abnormal buildup

Quarterly Tasks (One Hour)

• Check all accessible fasteners for tightness

• Clean any debris from around the machine

• Verify wash system operation

Annual Tasks (Two to Four Hours)

• Drain and replace gearbox oil

• Remove and inspect a sample of rings for wear measurement

• Check shaft seals for signs of leakage

• Inspect electrical connections in control panel

DAGYEE offers a comprehensive range of sludge dewatering solutions to meet the diverse needs of municipal and industrial wastewater treatment facilities. From the energy-saving volute screw press and the high-performance decanter centrifuge to the heavy-duty belt filter press and the rapid-deployment mobile system, each product is engineered with the latest technology to deliver reliable performance, low operating costs, and minimal environmental impact.

With decades of experience in solid-liquid separation, DAGYEE provides not only high-quality equipment but also full technical support—from sludge analysis and equipment sizing to installation supervision and after-sales service. Our team of engineers works closely with each customer to ensure the selected system matches site conditions, sludge characteristics, and performance requirements.

Whether you are planning a new wastewater treatment facility, upgrading existing dewatering equipment, or responding to an emergency situation, DAGYEE has the right solution for you. Contact us today to discuss your specific requirements and receive a customized proposal.

DAGYEE — Your Trusted Partner in Sludge Dewatering Solutions.

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