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[C-4.1.3 Studies on Integrated Control Techniques for Precursors of Acid Precipitation in South-eastern Region in China]

[Contact Person]

Ikuo WATANABE, Section Chief
Dept. Community Environmental Sciences,
Institute of Public Health, Ministry of Health and Welfare.
4-6-1 Shirokanedai, Minato-ku, Tokyo, 108 Japan
Tel +81-3-3441-7111(Ext.325), Fax +81-3-3446-4314

[Total Budget for FY1995-1996]

62,501 Yen (FY1996 43,250 Yen)

[Abstract]

　Many regions in China are suffered from serious acidic precipitation caused by the combustion of coal. In this study, we are introducing the effective techniques in Chongqing district as typical case, to reduce the emission of sulfur dioxide and other components by coal combustion. That is "coal-biomass briquette", which is produced from pulverized-coal, biomass such as straw, and slaked lime as desulfurizing agent, under high pressure(3-5ton/cm²).
　From the field surveys in Chongqing, we gathered the data on physico-chemical properties, available amount and cost for the raw materials of coal-biomass briquette. The expecting reduction rate of the emitted SO₂ was 80-90% in the preliminary test. We introduced the coal-biomass briquette technology including manufacturing and uses into the district and confirmed the high sulfer fixation, the high energy efficiency and the the versatility of coal-biomass briquette. At the same time, the evaluation systems of flue components from the cooking stoves for briquette or charcoal were developed and the emission factors for SO₂, NOx, CO and CH₄ for the combustion of briquette were calculated in some cases.

[Key Words]

Desulfurization, Improvement of fuel, Coal, Briquette, Flue, Chongqing