Description

DAGYEE Screw Press Sludge Dewatering Equipment

1.Product Overview

The DAGYEE Fully Automated PLC Controlled sludge dewatering system represents the pinnacle of intelligent dewatering technology. Designed for operators who demand precision, reliability, and ease of use, this system features an advanced PLC controller with a user-friendly touch screen interface. The system automatically manages all aspects of the dewatering process—from flocculation to cake discharge—while continuously monitoring performance parameters and adjusting operations for optimal results. With self-diagnostics and remote monitoring capabilities, this system minimizes operator intervention while maximizing uptime and performance consistency.

2. Working Principle

The automated system operates through a fully integrated control logic that manages the entire dewatering cycle:

1. Automatic Feed Control: The PLC monitors sludge feed concentration and flow rate, adjusting feed pump speed to maintain optimal loading. The system can be configured to run continuously or on a batch cycle based on tank level signals.

2. Polymer Dosing Optimization: The touch screen interface allows operators to set polymer dosage rates. The PLC automatically adjusts dosing pump speed in proportion to sludge flow, maintaining consistent polymer-to-sludge ratios for optimal flocculation.

3. Dewatering Process Monitoring: Sensors throughout the system provide real-time feedback on key parameters:

• Screw rotation speed (VFD-controlled)

• Back-pressure plate position (servo-controlled)

• Cake discharge quality (visual monitoring via camera option)

• Filtrate clarity (turbidity sensor option)

• Power consumption (energy monitoring)

4. Self-Diagnostics and Alarms: The system continuously monitors for abnormal conditions including:

• High vibration

• Motor overload

• Low sludge feed

• Polymer solution low level

• Abnormal back pressure

• Communication errors

5. Remote Access Option: Optional remote connectivity allows authorized personnel to monitor system status, view performance data, and receive alarm notifications via mobile app or web interface.

3. Key Advantages

• PLC Controller – Siemens or equivalent brand for industrial reliability

• Full Color Touch Screen – 7" or 10" HMI with intuitive icons and real-time data display

• VFD Control – Variable frequency drives on feed pumps, screw drive, and polymer pumps

• Automatic Start/Stop – Can be configured for continuous operation or batch mode with tank level control

• Data Logging – Built-in data recording of all key parameters (up to 1 year of data storage)

• Multi-Language Interface – English, Chinese, Russian, Spanish, Arabic (customizable)

• Remote Monitoring – Optional connectivity for SCADA integration and remote support

• User Access Levels – Operator, supervisor, and administrator levels with password protection

4. Technical Specifications

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

• Significantly reduces operator involvement (1-2 hours per day for routine checks)

• Eliminates human error by automating critical control functions

• Optimizes polymer consumption through closed-loop control

• Provides performance consistency across shifts and operators

• Early fault detection prevents major breakdowns and costly downtime

• Data logging enables process optimization and troubleshooting

• Scalable control system can be expanded for multi-unit installations

• Compatible with all DAGYEE dewatering equipment (screw press, centrifuge, belt press)

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

7.Applications

• Facilities with limited operator resources or high turnover

• Large plants requiring centralized control of multiple dewatering units

• Remote installations where on-site expertise is limited

• Facilities with strict discharge compliance requiring consistent performance

• Operations conducting process optimization studies

• Facilities moving toward Industry 4.0 / smart plant initiatives

• Multi-shift operations needing consistent performance across shifts

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