FEEDER SINGH 2.ppt

sdfdf

1. PRESENTATION ON
PRESENTED BY
B M SINGH

2. PRESENTATION OVERVIEW
TYPE OF WEIGHING SYSTEM
CAMPARESION OF WEIGHING SYSTEM
COAL FEEDER PRINCIPLE
COAL FLOW CALCULATION
COAL FEEDER INSTRUMENT
COAL FEEDER PERMISIVE
COAL FEEDER TRIPPING INTERLOCK
COAL FEEDER LOGIC VIEW
COAL FEEDER SYSTEM OVERVIEW

3. TYPE OF WEIGHING SYSTEM
•VOLUMETRIC
•GRAVIMETRIC
VOLUMETRIC SYSTEM
IN VOLUMETRIC SYSTEM ROTORY BUCKET ARE USED
IN THIS SYSTEM BULK DENSITY IS REQUIRE FOR THE
WEIGHT CACULATION
GRAVIMETRIC SYSTEM
IN GRAVIMETRIC SYSTEM BALANCE BELT SYSTEM IS
USED
IN THIS SYETEM BULK DENSITY NOT REQUIRE BECAUSE
WE GATTING DIRECT WEIGHT OF ANY MATERIAL

4. CAMPARESION OF WEIGHING SYSTEM
VOLUMETRIC SYSTEM
VOLUMETRIC SYSTEM USING FIXED VALUME
TYPE BUCKET SO DUE TO SIZE VARIATION IS
GIVING MORE ERROR.

5. ROTORY FEEDER

6. GARVIMETRIC SYSTEM
BECAUSEOFTHEHETEROGENEITYOFCOAL,GRAVIMETRIC
FEEDSYSTEMSUSEDOVERVOLUMETRICSYSTEM.
THEVOLUMEFLOWMEASUREMENTWILLBEINERRORBYTHE
VARIATIONINTHEBOTHDENSITYANDHEATINGVALUE,
WHEREASTHEWEIGHTFLOWSIGNALWILLBEINERRORONLY
TOTHEEXTENTOFVARIATIONINTHEHEATINGVALUE.

7. Balance Belt Feeder

8. The gravimetric feeder weighs material on a length of belt
between two fixed rollers using a weighing roller.
Belt speed is determined by a tachometer attached to the
motor shaft. A microprocessor multiplies the speed and weight
signal to arrive at the feeder output.
The microprocessor matches the feeder output to the
demanded output by adjusting the feeder motor speed.

10. Load Cell
Load Cell Excitation =10V
Load Cell Sensitivity =2mV/V
Load Cell CAPACITY=100KG
Capacity
Load Cell Weight Constant =
Sensitivity X Excitation
100
=
2 x 10
Load Cell Weight Constant = 5 Kg/mV
HOW TO CALCULATE CELL CONSTANT

11. Load cell mV to KG conversion
No Load mV
No Load Cell 1 mV= 3.35mV
No Load Cell 2 mV= 3.30mV
With Load mV
Load Cell 1 mV = 5.80mV
Load Cell 2 mV = 5.50mV
Load on load cell 1mV= Load Cell 1 mV -No Load Cell 1 mV
= 5.80 -3.35 = 2.45 mV
Load on load cell 2mV=Load Cell 2 mV -No Load Cell 2 mV
= 5.50 - 3.30 = 2.20 mV
Total mV= Load on load cell 1mV + Load on load cell 2mV
= 2.45 + 2.20 = 4.65mV
Weight in KG = Total mV x Load Cell Weight Constant
= 4.65mV x 5 Kg/mV
Weight in KG = 23.25 Kg

12. ADVANTAGE OF GRAVIMETRIC COAL FEEDER SYSTEM
Fuel Savings through Improved Boiler Efficiency
Improved Combustion Efficiency/LOI
Improved Pressure and Superheat Control
Less Slagging and Plug gage
Less NOx through Better Control of Excess Air
Less Corrosion
Stability and Improved Response of Combustion Controls
Reduced O&M costs
Improved Coal Mill Performance
Safety

13. 1.MAKE :-BEIJING POWER EQUIPMENT GROUP
2.TYPE :-DPG50
3.CENTRE DISTANCE OF COAL SUPPLY : -2500mm
4.RANGE OF OUTPUT :-5-50 TPH
5.RANGE OF BELT SPEED :-34-210 mm/sec
6.POWER :-2.2KW
7.WEIGHT :-3.6 T

14. COAL FEEDER INSTRUMENT
LOAD CELL BELT DEVIATION
SWITCH
STAPPER
COAL SWITCH
TACO
GENERATOR
OUTLET COAL
BLOK SWITCH
TEMPERATER
SWITCH

15. COAL FEEDER CONTROL SYSTEM
FEEDER CONTROL
PANEL
SIEMENS BW 500
MILLTRONICS
VFD FOR BELT
MOTOR

16. COAL FEEDER CONTROL SYSTEM
COAL FEEDER PLC &
RELAY
MICROMASTER 440
VFD
PLC & CONNECTION

17. COAL FEEDER PERMISSIVE
PULV RUNNING
COAL FEEDER MIN
COAL FEEDER REMOT CONTROL
COAL LEVEL SPARK PERMIT
COAL FEEDER NO FAILURE
COAL FEEDER INLET GATE OPEN
COAL FEEDER OUTLET OPEN
NO MFT

19. MFT
PULV STOPPED
COAL FEEDER OUTLET GATE CLOSED
COAL FEEDER STRAP COAL OFF
COAL FEEDER BELT DEVIATION
COAL FEEDER OUTLET PLUGGED
TEMPERATURE ALARM FOR COAL FEEDER

22. COAL FEEDER SYSTEM OVERVIEW
THREE SYSTEM USED IN COAL FEEDER
SIEMENS MILLTRONIC BW 500
TELEMECANIQUE TWIDO PLC
SIEMENS MICROMASTER 440 VARIABLE
FREQUENCY DRIVE

23. SIEMENS MILLTRONIC BW 500
TheMilltronicsBW500isafull-
featuredintegratorforusewithbelt
scalesandweighfeeders.Thespeedand
loadsignalsfromtheconveyorandscale,
respectively,areprocessedtoderiverate
ofmaterialflow,andtotalization.The
primaryvaluesofspeedandload,and
thederivedvaluesofrateandtotalare
availablefordisplayonthelocalLCD,or
asoutputintheformofanalogmA,
alarmrelayandremotetotalization.

24. LOAD CELL CONNECTION DETAILS

26. WHY SIGNAL ISOLATOR USED
WHEN THE DIFFERENTPOWER SUPPLY USED BY
THE SYSTEM SO SIGNAL SEPERATION IS
REQURE THAT TIME SIGNAL ISOLATOR DEVICE
IS VERY IDEAL FOR THAT PROPOSE.

27. CALIBRATION PROCEDURE
CONDITION
1.Feeder Up & Down gate should be closed.
2.Seal air valve should be closed.
3.Set the frequency 20Hz in Variable frequency drive.
4.No coal on belt.
5.Hot & Cold air damper should be closed
ZERO CALIBRATION
1.First check belt should be empty.
2.Start the belt from local mode (Start Emergency).
3.Press the zero key from MILTRONICS integrator in local panel.
4.After pressing enter key, zero calibration started.
5.Display shows ‘zero calibration is completed’.
6.After completion of zero calibration check the deviation must
be within the (±0.03).
7.But if the deviation is more than (±0.03) again do the zero
calibration for reducing the deviation (By press enter key).
Otherwise press RUN key.

28. SPAN CALIBRATION
1.First put the standard weight of 21.9408kg with clamp (2
nos.) weight 1.5096kg on belt.
2.Start the belt from local mode (Start Emergency).
3.Press the span key from MILTRONICS integrator in local
panel.
4.After pressing enter key, span calibration started.
5.Display shows ‘span calibration is completed’.
6.After completion of span calibration check the deviation
must be within the (±0.03).
7.But if the deviation is more than (±0.03) again do the span
calibration for reducing the deviation (By press enter key).
Otherwise press RUN key.

29. FEED RATE CALCULATION
FEED RATE = M X N
Where M = Mass in Kg
N = Speed (m/s) = 0.210m/s
Mass in Kg = Standard weight/ Idler spacing
=23.45/0.4 = 58.625 Kg
FEED RATE = 58.625 X 0.210 = 12.31 Kg/sec
= 12.31 x 60 =738.675 Kg/min
= 738.675 x 60 = 44320.5 Kg/hour
= 44320.5/1000 = 44.32 TPH

30. COAL FEEDER VFD SETTING
PROCEDURE.
GO TO P-0010
CHANGE THE VALUE
FROM (0 TO 1) BY
PRESSING UP & DOWN
KEY
GO TO P-1080 (MINIMUM
FREQUENCY)
SET THE MINIMUM
FREQUENCY BY USING UP &
DOWN KEY
PRESS-P
BY PRESSING
UP & DOWN
KEY
PRESS-P (2
times)
SET THE MAXIMUM
FREQUENCY BY USING UP &
DOWN KEY
GO TO P-1082 (MAXIMUM
FREQUENCY)
BY PRESSING
UP & DOWN
KEY
PRESS-P (2
times)

31. TELEMECANIQUE TWIDO PLC
IT IS EXPANDABLE TYPE
PLC WE CAN ADD THE IO
TO THIS PLC. TOTAL 30
NOS DI AND 21 NOS DO
ARE CONNECTED TO THIS
PLC.

32. Sr. No. DISCRIPTION
TYPE
OF IO
ADDRESS
1 Feed coal flow rate low extreme DI
I0.0
2 Coal feeder body over temperature DI
I0.1
3 Up gate end of open DI
I0.2
4 Up gate end of close DI
I0.3
5 Coal outlet blockage DI
I0.4
6 Coal-free DI
I0.5
7 Belt left side off-center DI
I0.6
8 Belt right side off-center DI
I0.7
9 Coal feeder & mill interlock DI
I0.8
10Belt motor in manual control DI
I0.9
11Belt motor in remote control DI
I0.10
12Open up gate(push-botton) DI
I0.11
PLC INPUT/OUTPUT LIST

33. 13Close up gate(push-button) DI IO.12
IOIIIII0.12
14Up gate opening rate retain(push -button) DI I0.13
15Emergency shut-down DI I0.14
16Protection function put into/exit DI I0.15
17Frequency converter run DI I0.16
18Frequency converter failure DI I0.17
19Thermal overload relay of coal feeder actuation DI
I0.18
20Thermal overload relay of cleaning chain actuation DI
I0.19
21Thermal overload relay of oil pump actuation DI
I0.20
22Coal feeder start in remote DI I0.21
23Coal feeder stop in remote DI I0.22
24Meter fault DI I0.23
25Down gate end of open DI I1.0
26Down gate end of close DI I1.1
27Open down gate(push -botton) DI I1.2
28Close down gate(push -botton) DI I1.3
29Down gate opening rate retain(push -botton) DI I1.4
30
Thermal overload relay of oil pump actuation down
gate actuation DI
I1.5

34. 31Coal feeder belt start DO QO.0
Q0.0
32Coal feeder belt stop DO
Q0.1
33Current & voltage convert DO
Q0.2
34Oil pump motor start DO
Q0.3
35Cleaning chain motor start DO
Q0.4
36Open up gate DO
Q0.5
37Close up gate DO
Q0.6
38Open down gate DO
Q0.7
39Close down gate DO
Q0.8
40Coal feeder run indication DO
Q0.9
41Control system common alarm DO
Q0.10
42Coal feeder over temperature alarm indication DO
Q0.11
43Coal outlet blockage alarm indication DO
Q0.12
44Belt coal-free indication DO
Q0.13
45Feed coal flow rate low extreme indication DO
Q0.14
46Protection actuation indication DO
Q0.15

35. 47Mill interlock actuation indication DO Q2.0
Q2.0
48Belt off-center indication DO
Q2.2
49Coal feeder ready DO
Q2.4
50Coal feeder fan start DO
Q2.6
51Local auto control DO Q2.4