Research Article
[Retracted] Kinetics of Sludge Superheated Steam Drying and Optimization of Process Parameters
Table 9
Moisture effective diffusion coefficients of sludge under different superheated steam drying condition.
| | Fixed factor condition | Variable factor condition | Slope k | R2 | Deff/(m2·s−1) |
| | 6 mm, 22 m3/h | 180°C | −0.00184 | 0.96341 | 2.6846061 × 10−8 | | 195°C | −0.00202 | 0.96828 | 2.9472306 × 10−8 | | 220°C | −0.00252 | 0.97106 | 3.6767431 × 10−8 | | 260°C | −0.00301 | 0.97455 | 4.5229776 × 10−8 |
| | 220°C, 22 m3/h | 2 mm | −0.00617 | 0.95001 | 1.00024 × 10−8 | | 3.5 mm | −0.00319 | 0.96456 | 1.68305 × 10−8 | | 6 mm | −0.0024 | 0.98207 | 3.50166 × 10−8 | | 10 mm | −0.00172 | 0.98165 | 6.9709 × 10−8 |
| | 220°C, 6 mm | 22 m3/h | −0.00192 | 0.96692 | 2.80133 × 10−8 | | 29 m3/h | −0.00234 | 0.97396 | 3.41412 × 10−8 | | 36 m3/h | −0.00273 | 0.97292 | 3.98314 × 10−8 | | 40 m3/h | −0.00309 | 0.97959 | 4.50839 × 10−8 |
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Note. Deff is the effective diffusion coefficient of sludge.
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