采用特殊设计的气体引出方式，大大缩短了油气在沉降器内的平均停留时间。
The average residence time of oil gases in the disengager is also shortened by adding an unique device for gas withdrawl.
随着挥发物停留时间的增加，其焦油收率均下降，而气体收率则上升。
Increasing the residence time of the volatile matter, the yield of tar is decreased and that of gas is increased.
它也认识到，体积密度的气体质量相当大的影响，因为它影响在火灾中燃料的停留时间，燃油流速和气体流量。
It is also recognised that bulk density has considerable impact on gas quality, as it influences the fuel residence time in the fire box, fuel velocity and gas flow rate.
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