A
Problem: We are not able to run the Furnace in Temperature Auto mode(1200 deg C) & we do not know the control philosophy
There are three control valves:
For Air with Flow meters ( 4-20 Ma O/p)
For BF with Flow meters ( 4-20 Ma O/p)
For Propane with Flow meters ( 4-20 Ma O/p)
Two S type T/c are there ( Range 0 to 1400 deg C) (4-20 ma)
The Mixed Gas ( BF & Propane ratio is:
Bf Gas : 94% ,calforic value: 700K cal/m3( 2930 kj/m3)
Propane gas: 6 % ,,calforic value: 22690 k cal/m3
As Blast Furnace gas ( BF Gas) is free & Propane is very costly , intially For statring of furnace Propane is used but when temp is about 700 deg ,less propane & more BF gas is used
Can you help in suggesting a control scheme for regulating three control valves in Auto.
There are three control valves:
For Air with Flow meters ( 4-20 Ma O/p)
For BF with Flow meters ( 4-20 Ma O/p)
For Propane with Flow meters ( 4-20 Ma O/p)
Two S type T/c are there ( Range 0 to 1400 deg C) (4-20 ma)
The Mixed Gas ( BF & Propane ratio is:
Bf Gas : 94% ,calforic value: 700K cal/m3( 2930 kj/m3)
Propane gas: 6 % ,,calforic value: 22690 k cal/m3
As Blast Furnace gas ( BF Gas) is free & Propane is very costly , intially For statring of furnace Propane is used but when temp is about 700 deg ,less propane & more BF gas is used
Can you help in suggesting a control scheme for regulating three control valves in Auto.