Continuous type adjustment with small internal heat of the way the heating system
Directly heated heat treatment plants
Annealing or forging
1. Manual valve 2. Flow meter
3. Pressure gauge KFM with manual cock for pressure gauge 4. Air/gas ratio control with solenoid valve for gas and bypass solenoid valve for gas
5. Bellows unit 6. Gas burner with integrated low fire rate lance
7. Solenoid-operated butterfly valve MK with gear motor 8. Air adjusting cock
9. Bellows unit
10. Air pressure governor
11. Pressure gauge with manual cock for pressure gauge
12. Adjusting cock
13. Burner control unit
When the burner control unit(13)is enabled,the bypass solenoid valve of the air/gas ratio control(4)opens.At the same time,the low fire rate lance(6)is ignited via the burner control unit(13).When the low rate lance(6)is in operation,the main burner(6)can be operated via the burner control unit(13)on request.For this purpose,the butterfly valve for air(7)must be in ignition position.Only then is the main gas solenoid valve(4)activated.The capacity of the main burner(6)is controlled by varying the butterfly position of the butterfly valve for air(7).If heat is requested,the butterfly valve for air(7)opens steplessly.The increasing air pressure at the air/gas ratio control(4)via the impulsel line produces ahigher gas outlet pressure.This maintains the ratio between gas and air flow rate constant at all operating points.During entire operation,separate flame failure control of the low fire rate lance(6) is performed by the burner control unit(13),The electronic flow meter(2)indicates the operating flow rate and the gas quantily consumed.
Directly heated heat treatment plants
