Research Article
Flame Failures and Recovery in Industrial Furnaces: A Neural Network Steady-State Model for the Firing Rate Setpoint Rearrangement
Table 1
The nominal parameters of the furnace.
| | Parameter (unit) | Symbol | Value |
| | Process fluid flow rate (kg/s) | | 45 | | Process fluid inlet temperature (K) | | 504 | | Process fluid outlet temperature (K) | | 637 | | Process fluid inlet pressure (kPa) | | 1036 | | Process fluid outlet pressure (kPa) | | 371 | | Fuel flow rate (kg/s) | | 0.07 | | Tube out diameter (m) | | 0.12 | | Tube wall thickness (m) | | 0.012 | | Process fluid outlet temperature at convection section 2 (K) | | 544 | | Process fluid outlet temperature at convection section 1 (K) | | 562 | | Process fluid outlet pressure at convection section 2 (kPa) | | 823 | | Process fluid outlet pressure at convection section 1 (kPa) | | 772 | | Fuel gas lower heating value (MJ/kg) | LHV | 48.594 | | Tube length (m) | L | 3.4 | | Mean gas-side heat transfer coefficient in convection section 2 (w/m2K) | | 238.5 | | Mean gas-side heat transfer coefficient in convection section 1 (w/m2K) | | 277 | | Mean oil heat transfer coefficient in convection section 2 (w/m2K) | | 4871 | | Mean oil heat transfer coefficient in convection section 1 (w/m2K) | | 3737 | | Mean gas-side heat transfer coefficient in the radiation section (w/m2k) | | 548 | | Furnace height (m) | — | 12.5 | | Furnace depth (m) | — | 5.5 | | Furnace width (m) | — | 5.2 | | Number of passes in convection and radiation sections | — | 4 | | Number of rows of tubes in convection section 2 | — | 10 | | Number of rows of tubes in convection section 1 | — | 3 | | Number of tubes in one pass of the radiation section | — | 24 |
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