Abstract
The coal consumption in Chongqing, which has suffered from serious air pollution and acid rain, is very large. Moreover, the sulfur content in coal produced in the region is very high. SO2 resulting in serious acidification of rainwater is emitted from coal combustion and is concentrated in lower atmosphere due to few desulfurizing equipment and unfavorable meteorological conditions for the diffusion of air pollutants in the area. For this reason, the control technique for SO2 emission is very important.
In this paper, the reduction efficiency of SO2 emitted by combustion of the biobriquette prepared from low graded raw coal with high sulfur content, biomass and slaked lime in Chongqing was investigated by the model combustion experiment. Under our experimental conditions, the reducing efficiency of SO2 emission from high sulfur coal-biomass briquette amounted to 82-95%. Especially, compared with the coal washing, the coal-biomass briquetting technique can effectively reduce sulfur emission. It was considered that the bio-briquette was useful to civilian and small factory consumes as a part of the countermeasures for SO2 emission control. This result suggested that coal-biomass briquetting technique was suitable in Chongqing.
