The ALFA-06/3E system is used for continuous measurement of ash and moisture content, as well as calculation of calorific value, in coal transported via a belt conveyor.
The ALFA-06/3E system provides:
Real-time information on coal quality parameters
Measurement of coal layers starting from 50 mm in thickness
Integration into control systems
Operation with user-friendly software adapted to customer needs (network operation)
Simple design suitable for easy installation
Non-contact measurement of layered coal of varying quality
Specification
Metrological Parameters:
Type of measurement: Automatic, dynamic, non-contact
Measured material: Hard coal
Coal granulation: 0 – 30 (80) mm
Layer thickness: 50 – 250 (300) mm
Measurement ranges:
Ash content: 3 – 95% Ar
Moisture content: 3 – 30% Wrt
Measurement error (based on average standard deviation):
Ash 3 – 30%: σ ≤ 1.5% Ar
Ash 30 – 95%: σ ≤ 2% Ar
Moisture: σ ≤ 1.5% Wrt
Basic measurement time, Any multiple of base interval
Electrical Parameters:
Power supply:
Ash gauge electronics: 230 V AC, 50 Hz
Moisture gauge electronics: 24 V DC
Protection class: IP54
Radiation source characteristics:
In ash gauge:
¹³⁷Cs – 0.555 GBq
²⁴¹Am – 11.1 GBq
In moisture gauge:
Electromagnetic wave, power 10 mW
Outputs:
Standard: RS 422
Optional: Current loop 4–20 mA
Measurement result display: Monitors, displays
Mechanical Parameters:
Installation and operating conditions:
All standard, unreinforced conveyor belts
Central placement of layered coal of varying quality
External dimensions and weight of ash or moisture gauge:
Mechanical part: 1400 × 600 × s mm (s = conveyor width)
