Coal System. Combustion optimization Coal G3 Online measurement of the coal mass flow between the mill and the burner Real time!. Example Pipe Arrangement. Receiver. Transmitter. A. w. o. l. f. s. s. a. m. In case of roping: cover full cross section.
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Online measurement of the coal mass flow between the mill and the burner Real time!
In case of roping:
The sensors are mounted through easy drill and tap holes (14x1 mm)
2 sensors in one pipe are used to measure the coal concentration over the FULL cross sectional area of the pipe.
Coal Dust Pipe
Signal Sensor 2
w=20,8 m/s (average velocity of the particles !)MECONTROL CoalMeasurement Principle „velocity“
Microwave Board D-HF
MECONTROL Coal Measurement Cabinet
measurement sensorMECONTROL Coal Sensor installation
mass flow and velocity
Mill response time can be derived,
Impact on load changes,
Indication for mill wear and coal
Low standard deviation of concentrations and velocities
Velocity is measured using a cross correlation technique (picture: pipes 1 through 8). Measurement range:
5 m/sec to 50m/sec
Absolute mass flow
Out of the independent measurement values, density and velocity, the absolute mass flow is calculated without using any feeder signal.
10 g/sec to 20 kg/sec
without control active control
Air Register Settings [%]
50-20-20-20-20-20-20-50 O2 setpoint 3.1%
50-20-20-20-20-30-50-80 O2 setpoint 3.1%
50-20-20-20-20-20-50-80 O2 setpoint 3.1%
50-20-20-20-20-20-50-80 O2 setpoint 2.5%
50-20-20-20-20-20-50-80 O2 setpoint 2.2%
50-20-20-20-20-30-50-80 O2 setpoint 2.2%
Right boiler sidewall
Left boiler sidewall
Example Pipe Arrangement
Damper, one sided; direction against flow rotation
Damper as close as possible on the top of the classifier