Influence of Technical Characteristics of Solid Fuels at Estimation of Emissions from Small Boiler Plants
Keywords:technical characteristics of fuel, coal, experimental determination, calculated emissions, particulate matter, sulfur and nitrogen oxides
The paper is concerned with the small-scale boiler plants, located in the coastal area of Lake Baikal. There are about 70 boilers of such kind (less than 1 Gcal/h) in the region. The fuel used by the boilers is wood and coal from various deposits. There is no data on harmful emissions into the atmosphere from the small-scale boiler plants in the Baikal natural territory. One of the indices that influence the amount of air pollutant emissions is technical characteristics of fuels. Normally, these characteristics are given in reference books and represent averaged data on coal grade and deposit. The experimentally determined technical characteristics of solid fuels from fuel storages of boiler plants differ greatly from the averaged reference ones. The calculations of the emission quantities, based on the reference and experimental data on technical characteristics show that the maximum single emission can differ by 1.5-2 times for various emission components (particulate matter, sulfur and nitrogen oxides). The research made it possible to draw a conclusion that the use of technical characteristics of fuels from reference sources distorts the results of the research. In order to receive reliable environmental estimates, technical characteristics of coals should be determined directly at energy facilities.