Research Article
[Retracted] Kinetics of Sludge Superheated Steam Drying and Optimization of Process Parameters
Table 2
Fitting results of condensation stage of sludge superheated steam drying under different drying conditions.
| | Fixed factor condition | Variable factor condition | Model coefficients | R2 | χ2 ×10−6 | RMSE ×10−3 |
| | 6 mm, 22 m3/h | 180°C | A = 6.90623 × 10−4; B = 2.50777 × 10−6 | 0.98819 | 9.12714 | 3.02 | | 195°C | A = 3.09735 × 10−4; B = 1.65517 × 10−5 | 0.94919 | 40.5793 | 6.37 | | 220°C | A = 0.00196; B = −1.59104 × 10−5 | 0.95729 | 16.4321 | 4.05 | | 260°C | A = 8.79372 × 10−4; B = −2.223 × 10−6 | 0.95666 | 9.2986 | 3.05 |
| | 220°C, 22 m3/h | 2 mm | A = 0.00176; B = −1.19441 × 10−5 | 0.99244 | 3.34066 | 1.83 | | 3.5 mm | A = 1.09123 × 10−4; B = 1.1279 × 10−5 | 0.97084 | 9.86799 | 3.14 | | 6 mm | A = 0.00115; B = −5.69471 × 10−6 | 0.99446 | 1.798 | 1.34 | | 10 mm | A = 1.73354 × 10−4; B = 8.0251 × 10−6 | 0.96402 | 8.5369 | 2.92 |
| | 220°C, 6 mm | 22 m3/h | A = 0.00196; B = −8.86327 × 10−6 | 0.98245 | 13.3507 | 3.65 | | 29 m3/h | A = 1.82449 × 10−4; B = 9.2205 × 10−6 | 0.97101 | 11.2897 | 3.36 | | 36 m3/h | A = 6.4653 × 10−4; B = 2.38935 × 10−5 | 0.98203 | 7.51466 | 2.74 | | 40 m3/h | A = 1.61425 × 10−4; B = 7.2576 × 10−6 | 0.99531 | 0.73344 | 0.8564 |
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