[Exploration of demonstration and promotion experiment of fluorine fixation technology during coal burning].

OBJECTIVE

To demonstrate and promote the fluorine-fixing technology of the coal burning on a calcium-based compound as the additive for briquettes made in the coal-burning fluorosis area, in order to evaluate the effects of fluorine-fixing and indoor air pollutants condition.

METHODS

The briquettes added calcium-based fluorine sorbent were used for heating and cooking. In the meantime, the figures on various components in briquettes and fluorine content in coal slag as well as concentrations of indoor air fluorides, sulfur dioxide and PM10 were calculated.

RESULTS

On the basis of the coal burning fluorine-fixing pilot experiment, 100 households in Longli County, Guizhou Province were selected as the experimental group for coal burning fluorine-fixing demonstration and promotion. When the burning calcium-based fluorine-fixing bitumites were made into coalballs, the average fluorine-fixing ratios in demonstration and promotion were 77.26%. The average reduction ratios of indoor air pollutants, fluorides were 53.3% -73.8%, sulfur dioxide were 62.8% -91.1% and PM10 were 9.5% -41.4%. There were 10% increases in the cost of briquettes due to the addition of calcium-based fluorine sorbent in demonstration and promotion.

CONCLUSION

The preparation process of calcium-based fluorine-fixing briquettes was simple and highly flammable and it was applicable to regions abundant in bitumite.