Researches on the NOx emission characteristics of HT （Huangtai coal）, LC（Laicheng） coal are carried out in different atmosphere. The results show that the NOx emission time is postponed in O2/N2 atmosphere mixed w...Researches on the NOx emission characteristics of HT （Huangtai coal）, LC（Laicheng） coal are carried out in different atmosphere. The results show that the NOx emission time is postponed in O2/N2 atmosphere mixed with CO. The releasing times of volatile nitrogen and char nitrogen approach, the amount of NOx reduces. In high 02 concentration atmosphere mixed with CO2, the nitrogen releasing times cane ahead of time, NOx congregate in the beginning of the combustion. On the contrary, nitrogen releases separately, and the amount of NOx reduces greatly.展开更多
On the basis of study on physical and chemical properties of magnetic bead (MB) in fly ash (FA), the paper gives out the separation methods of MB and results of three separating process. The result of comparative test...On the basis of study on physical and chemical properties of magnetic bead (MB) in fly ash (FA), the paper gives out the separation methods of MB and results of three separating process. The result of comparative test in size, density, stability, magnetic material content, specific magnetic susceptibility (SMS), medium recovery oxidation resistance and wear resistance between MB and magnetic fines currently used in dense medium separation leads to that using MB recovered from fly ash is used as medium solids in coal cleaning in stead of magnetic fines not only have no influence upon taryests of separation, but can bring good economic and social benefits.展开更多
基金supported by the Natural Science Foundation for Young Scientists of Shanxi Province(No.2008041002)
文摘Researches on the NOx emission characteristics of HT （Huangtai coal）, LC（Laicheng） coal are carried out in different atmosphere. The results show that the NOx emission time is postponed in O2/N2 atmosphere mixed with CO. The releasing times of volatile nitrogen and char nitrogen approach, the amount of NOx reduces. In high 02 concentration atmosphere mixed with CO2, the nitrogen releasing times cane ahead of time, NOx congregate in the beginning of the combustion. On the contrary, nitrogen releases separately, and the amount of NOx reduces greatly.
文摘On the basis of study on physical and chemical properties of magnetic bead (MB) in fly ash (FA), the paper gives out the separation methods of MB and results of three separating process. The result of comparative test in size, density, stability, magnetic material content, specific magnetic susceptibility (SMS), medium recovery oxidation resistance and wear resistance between MB and magnetic fines currently used in dense medium separation leads to that using MB recovered from fly ash is used as medium solids in coal cleaning in stead of magnetic fines not only have no influence upon taryests of separation, but can bring good economic and social benefits.
