Research Article
An Experimental Investigation of Sewage Sludge Gasification in a Fluidized Bed Reactor
Table 2
Gasification parameters in tests I and II.
| | | Test I | Test II |
| | Wet fuel burned (g) | 4521.7 | 11743.9 | | Wet fuel feed rate (g/s) | 8.94 | 12.52 | | Reactor preheating (°C) | 850 | 850 | | Primary air preheating (°C) | 300 | 300 | | Primary air (L/min) | 15 | 20 | | Bed material | Al-Si | Al-Si | | Fresh bed material (g) | 866 | 433 | | Removed bed material (g) | 2455.74 | 433 + 128.6 + 1782.61 | | Ash horizontal pass (g) | 1261.6 | 193.1 | | Ash cyclone (g) | 115.3 | 113.2 | | Alkali sampling train | | | | Bottle 1 (g) | 46.6 | 97.1 | | Bottle 2 (g) | 3.8 | 50.7 | | Bottle 3 (g) | 0.9 | −121.5 | | Bottle 4 (g) | 0.5 | 0.5 | | Desiccant (g) | 1.9 | 2.8 | | Filter paper (g) | 0.0947 | 0.052 | | Filter cake (g) | 3.3 | 0.4 | | Gas analyzed (m3) | 0.0972 | 0.1151 | | Time in alkali train (min) | 26 | 123 | Average flow rate through
tar train (L min−1) | 3.738 | 0.936 | | Ammonia sampling train | | | | Bottle 1 (g) | 109.9 | 85.6 | | Bottle 2 (g) | 11.5 | 8.3 | | Bottle 3 (g) | 2.3 | 2.1 | | Bottle 4 (g) | 0.7 | 0.1 | | Desiccant (g) | 2.9 | 6 | | Filter paper (g) | 0.0066 | 0.0003 | | Gas analyzed (ft3) | 4.631 | 14.101 | Time in ammonia
sampling train (min) | 26 | 123 | Average flow rate through
ammonia sampling train (L min−1) | 5.044 | 3.246 | | Tar sampling train | | | | Condenser 1 (g) | 180.3 | 147.3 | | Bottle and tubing (g) | 94.6 | 92.4 | | Line 1 (g) | 2 | 3.5 | | Condenser 2 (g) | 75.2 | 113.6 | | Line 2 (g) | 0.7 | 1.4 | | Impinger 1 (g) | −6.8 | −219 | | Impinger 2 (g) | 7.8 | 3.2 | | Line 3 (g) | 0 | 0.1 | | Desiccator (g) | 2.6 | 12.5 | | Filter paper (g) | 0.0197 | 0.0025 | | Gas analyzed (m3) | 0.3955 | 0.7547 | | Time in tar train (min) | 44 | 123 | Average flow rate through
tar train (L min−1) | 8.989 | 6.136 |
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Added bed during the test.
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