Thermal analysis and combustion characteristics in different stumping period of caragana korshinskii
Caragana korshinski, an shrub species, is very important to soil and water conservation.Korshinskii not only can be used as wind-break and sand-fixation can also be deemed to be economic crops.However when age increases, some problem exist, such as the decrease of growth and beneath and so on.The stubble technology in Caragana growth, not only to make it more robust growth can also produce a large number of korshinskii.Caragana is a high-value crop economy, is often used as livestock feed, as have better combustion characteristics to be used as fuel.Northwest of Chinese Caragana yield is large, it can replace coal, for power generation.Caragana utilization technology can not only improve its economic value, increase revenue for the local, but also reduce environmental pollution.Ningxia region has a large Caragana, but usually used as domestic fuel, which value low.It's a study of caragana korshinskii in Ningxia province.Through the growth index, industry analysis, sulfur analysis, calorific value, and thermal gravimetric analyzes.The results indicated: 1)Three years later after stumping, plant height, basal diameter and number of branches were higher than CK by 16.67％, 11.54％ and 160.00％.This shows take appropriate stumping period can make korshinskii grow more vigorous, and korshinskii production increased more than doubled.2)By analyzing the calorific value of five students Caragana were compared, Korshinskii heat value increases with it's age, korshinskii and found 3-5 years old Caragana heat better, but it was not much difference;Caragana through different months from October to December harvest harvesting Caragana found most beneficial.3)From the analysis of the sulfur content, Caragana sulfur content is 1/12 times of bituminous coal.4) Industry analysis and thermo gravimetric analysis showed that caragana korshinski and coal ash generated as compared, Caragana ash is 1/9 times of bituminous coal, Dust is a major pollutant of the city.Dust is mainly produced by burning coal, including power plants, combustion boilers.PM2.5 and PM10 is due primarily to burn a lot of coal, the coal will not only generate large amount of dust, but also produce many sulfide and nitrogen oxides and other harmful substances.So it should be possible to reduce the use of coal.Korshinskii contain small amounts of sulfur compounds and ash, it is a good substitute for coal, which benefits the environment.5)Kinetics parameters of activation energy E and frequency factor A were deduced by reaction kinetics equations.It indicated that biomass has lower E value.So it's easy to be ignited.The activation energy korshinskii 3 years old and above growth cycle is relatively low, the escape of volatile combustion stage and the activation energy in the 2.31-2.77 kJ/mol range, fixed carbon combustion stage activation energy of about 35.26-40.45 kJ/mol in the range.In summary, by stumping for a period of three years of caragana are most suitable as a thermal power plant fuel.
biomasscombustionpower generationCaragana korshinskistumping period
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