摘要
通过对三种不同煤种在同样条件下燃烧、同时在点火后每20分钟分别采集室内空气样进行氟化物和二氧化硫分析,结果表明:不同煤种在燃烧过程中的不同时间释放到空气中的氟化物和二氧化硫的浓度不同。石煤的氟化物和二氧化硫释放高峰时间均为点火后0～20分钟、无烟煤分别在点火后100～120分钟和20～40分钟,烟煤分别为20～40分钟和60～80分钟。氟化物释放最大值为石煤,无烟煤次之,烟煤最低,而二氧化硫释放最大值为烟煤,石煤次之,无烟煤最低。因此在进行大气采样时应根据不同煤种,选择最佳采样时间。
When the three different coals-stone coal,anthracite and bituminous coalwere burning under the same conditions in different rooms,we took the airsamples in each room every twenty minutes to analyse Fluoride and SulphurDioxide.The result showed that in the different time of the coal combustion,thedensity of Fluoride and Sulphur Dioride in the air was quite different.The summit time for Fluoride and Sulphur Dioxide releasing after coalsburning was as followsstone coal:0—20 minutes for both(F and S)anthracite:100—120 minutes for Fluoride Releasing20—40 minutes for Sulphur Dioxid Releasingbituminous:20—40 minutes for Fluoride Releasing60—80 minutes for Snlphur Dioxide ReleasingThe maximum of Fluoride-Releasing ranked stone coal first anthracite secondand bituminous third,while for that of Sulphur Dioride Releasing,bituminous,coal camefirst stone coal second and arthracite last.Therefore,when taking air samples,we ought to choose the most suitabletime according to the different coals.
出处
《中国地方病学杂志》
CAS
CSCD
1991年第6期340-342,共3页
Chinese Jouranl of Endemiology
