kiln feeding with pulverized fuel - 哈思勒 · sensor serial link or 4-20ma or sdu silo roto-feed...
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Edition : 05/09COAL FEEDINGTechnical SheetFor further information, please contact us
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DefinitionThe CLYDE-HASLER coal injection and dosing systems are designed to meet the requirement of applications using several types of pulverized fuel for a wide range of flowrates (up to 30 - 40 t/h) and over long distances.
Overall system
CONTROLLER
High stability for dosing: ± 0.5%High ratio coal/airBalanced pressure systemConstant flowrate measure in the conveying pipe.On line calibration without disturbance.ATEX design
KILN FEEDING WITH PULVERIZED FUEL
Empower your kiln while lowering energy.We provide you with stable highly efficient injection coal feeding.
Silo design, extraction, dosing, flowmeter, pneumatic conveying systems are defined according to your requirements
Overall system
FI
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Roto-Feed
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Dosing Hopper
1 Lock vesseLSituated between the storage silo and the weighing hopper, the lock vessel can be isolated and be either at atmospheric pressure to be filled with the pulverized material, or at con-veying pressure in order to feed the dosing hopper.
Lock vessel
2 DosING sYsTeM2.1 DosING hopper
The weighing of this 10 bar proof vessel allows an on-line calibration by comparison of the loss-in-weight against the quantity totalized by the flowmeter.
The dosing hopper has in the bottom a rotary lock Roto-Feed.
2.2. roTo-feeD
The Roto-Feed extracts and feeds the pneumatic conveying line with accurate correlation between the rotation speed and the mass flow.
A double activator blade ensures constant extraction of pulverized fuel in the whole discharge area.
A small quantity of compressed air flows across the pockets to ensure a perfect emptying and cleaning of these pockets.
The Roto-Feed is never subject to any ΔP, the pressure in the dosing hopper remains equal to the conveying air pressure.
There is consequently no air leakage and the quantity of air is limited to the volume of the pockets of the Roto-Feed.
No leakage means no wear and a longer life for the Roto-Feed.
A constant and optimal filling of the pockets is ensured which gives an excellent relationship between the rotation speed and the mass flow.
The conveying length has no impact on the system architecture, the pressure balancing being efficient at any value. Benefit: all the equipment concerned by ATEX rules can be gathered in the same place.
Each discharge cycle of the hopper (loss in weight) offers the opportunity to check the accuracy of the in-line flowmeter and that way the flow measurement is permanently reliable and not interrupted (unlike with a LWF).
The dome valves are designed for high frequency cycles thanks to the total absence of friction between the material and the shutter itself.
FOCUS ON THE SYSTEM
KILN FEEDING WITH PULVERIZED FUEL COAL FEEDINGTechnical Sheet
SCM2-P
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3 fLow MeasureMeNT: sMarTfLow 21The device sends micro waves into the process pipe and receives echoes from conveyed particles.
Frequency, amplitude and number of these echoes allow mass flow calculation.
4 coNTroLLer hasLer: scM2-pReads setpoint and flow measurement.
Processes the sensor signals (hopper weight, flowmeter).
Calculates the setpoint for the Roto-Feed speed.
Displays process parameters, status, alarms, messages on the SDU.
Flowmeter Smartflow 21
SDU and SCM2-P5 fLow coNTroL LoopThe controller adjusts the Roto-Feed speed according to the flow rate measured by the Smartflow 21, so that the actual feed rate is equal to the set point.
Flow control loop
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KILN FEEDING WITH PULVERIZED FUEL
Mass Flow Set Point
PID
Correction as per Loss in Weight
Measured flow
Transmitter
Sensor
Serial Link or4-20mA
Or SDU
SILO
Roto-Feed
COAL FEEDINGTechnical Sheet
3x400V AC
F.I.
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CLYDE Materials Handling LtdCarolina Court, Lakeside
Doncaster, DN4 5 RA- UK
TEL : +44 (0) 1302 321 313
FAX +44 (0) 1302 554 400
http://www.clydematerials.co.uk
Pictures not contractual
HASLER GroupHeadquarter
Zi de l’abbaye
38780 PONT-EVêQUE - France
Tel: +33 4 74 76 11 50
Fax: +33 4 74 16 11 55
http://www.hasler-int.com
FOCUS ON THE SYSTEM - options
7 BLowerSupply of overpressed air for the pneumatic conveying.
Sized according to nominal flowrate and conveying distance.
Adapted to your project requirements.
Copyright by HASLER. All modifications reserved
central cone
compensator
aeration nozzles
rotative activator blade
pneumatic slide gate
grease pumpgear-motor
6 exTracTIoNDirect extraction from the silo by combination of fluidization and arch breaking.
Possible distribution towards two or three outlets.
Extractor
Turnkey projectsHigh accuracy and reliability
Smart design of pneumatic transferAdapted conformity
Safety design
KILN FEEDING WITH PULVERIZED FUEL
Blower
For further information, please contact us
COAL FEEDINGTechnical Sheet
COAL.260.001-E.a