Study On The Transformation And Emission Control Of Beryllium During The Coal Combustion

China's energy consumption structure is given priority to with coal resources, and the situation in a long time remain the same. Coal as one of the main emissions of harmful trace elements, it has been gained comprehensive attention.This article takes the beryllium in coal as the research object. Beryllium, as one of the toxic elements, when it has been inhaled in finely divided form, dust, fume or vapour, may affect the upper airways and lungs and cause serious disease,even directly lead to death. In China, the enrichment phenomenon of beryllium is easily occurred in coal,burning this coal will cause large amounts of beryllium emission and ecological damage.But our country has little research on the beryllium in coal,emissions control technology of beryllium is even still at the blank stage.Coal as the main sources of emissions of beryllium in the atmosphere,studying the transfer-transformation behavior of beryllium during the coal combustion and emission control has an important significance.In order to study the migration characteristics of beryllium in coal combustion.In this paper,select lignite from Inner Mongolia.The thermodynamic equilibrium simulation was used to calculated the beryllium conversion in the combustion process of coal, the high temperature vacuum tube furnace was used to research beryllium compounds react with other solid substances and the coal added sorbents combustion experiments. X-ray diffraction(XRD), X-ray fluorescence probe(XRF) and inductively coupled plasma-mass spectrometry(ICP-MS) were used to reveal the transfer-transformation behavior of beryllium during the coal combustion,and Preliminary exploration of beryllium emission control method.The results indicated beryllium only reacted with aluminum compounds and the reaction resultants were BeAl2O4 and BeAl6O10. the solid-solid reaction experiments confirmed the correctness of simulation results, beryllium meanly reaction with aluminum material,but the actual reaction temperature was about 1000?, far above the simulation temperature 650?.Variety exists of aluminum will make reaction mechanism different in the combustion.Meanwhile,aluminum compounds reaction temperature with beryllium also willbe different.Beryllium in coal volatile strong at high temperature.Because the beryllium reacted with Al2O3, the release rate of beryllium in the coal sample added with Al2O3 reduced greatly, up to 33%. The coal sample added the illite, as a result of illite and beryllium reaction temperature higher than that of Al2O3, its inhibition was weaker than Al2O3. Kaolinite, due to the reaction temperature with beryllium was too high, the inhibition effect was the lowest.