Study on Desulfurization Characteristic of Desulphurizing Coal Water Slurry

2013 ◽  
Vol 807-809 ◽  
pp. 1459-1463
Author(s):  
Chang Xing Shi ◽  
Hai Xiang Tang
Keyword(s):  
Calcium Carbonate ◽  
Barium Carbonate ◽  
Pulverized Coal ◽  
Water Evaporation ◽  
Desulfurization Rate ◽  
Water Slurry ◽  
Coal Water Slurry ◽  
Desulfurization Efficiency ◽  
Reaction Atmosphere

With calcium carbonate and barium carbonate as desulfurizers, combustion desulphurization experiments of coal water slurry and pulverized coal were respectively done in the ZCL. The results show that desulfurization efficiency in coal water slurry is prior to the same pulverized coal. The desulfurization characteristic of desulphurizing coal water slurry was analyzed by comparing the desulfurization efficiency of coal water slurry and pulverized coal. The reaction atmosphere in the boiler is different from the pulverized coal because of water evaporation ,and the CO content was lower ,so the decomposing rate for desulphurization products was reduced,after water evaporated ,it formed microstructures which was considered as favorable to the desulfurization rate .

A Model of the Enhancement of Combustion of Coal-Water Slurry Fuels Using High-Intensity Acoustic Fields

1991 ◽  
Vol 113 (4) ◽  
pp. 268-276 ◽  
Author(s):  
S. Yavuzkurt ◽  
M. Y. Ha
Keyword(s):  
Mass Transfer ◽  
High Intensity ◽  
Slip Velocity ◽  
Sound Pressure ◽  
Pressure Level ◽  
Water Evaporation ◽  
Acoustic Fields ◽  
Water Slurry ◽  
Burn Out ◽  
Coal Water Slurry

Combustion of coal-water slurry fuels is simulated in the presence of high-intensity acoustic fields which increases heat and mass transfer from the droplets and particles, and thereby enhances the combustion. The steady-slip velocity and acoustically induced slip velocity are calculated along particle trajectories, giving the augmented Nusselt and Sherwood numbers in the presence of high-intensity acoustic fields compared with no-sound conditions. The paper also presents the water evaporation and char burn-out history for particles with diameters between 90–110 μm exposed to sound pressure levels of 160–170 dB and compares the results to similar cases under no acoustic field. A decrease in the char burn-out length of about 12.1 percent at 160 dB, 18 percent at 165 dB, and 24 percent at 170 dB sound pressure level is obtained compared to the case with no sound for 100-μm particles introduced at centerline.

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