错流填料吸收塔吸收率的测定

Determination of absorptivity in cross-flow packed absorption tower

填料塔是一种常用的气液传质设备,通过对传统填料塔内气液二相流动行为的研究,提出了一种带折流挡板的新型填料塔——错流填料塔。实验表明,错流填料塔能更好地消除壁流,改善气液二相的接触状况;错流填料塔的吸收率明显大于普通填料塔,在气液二相流量一定时,吸收率随着H/D(板间距与塔径之比)的减小而逐渐增大,当H/D=0.8时,吸收率最大;当H/D<0.8时,随着气量的增加,吸收率逐渐减小,仅在小气速下,吸收率较大,在气速较大时,由于压降过大,导致吸收操作无法正常进行。

The packed absorption tower is frequently-used gas-liquid mass transfer equipment. The flow behavior of gas-liquid phase in conventional packed tower was studied and a new-style packed tower with baffle-plate was put forward. The experiment shows that the cross-flow packed absorption tower can eliminate wall flow better and improve the contact of gas-liquid phase. The absorptivity of the cross-flow packed tower is obviously higher than that of conventional packed tower when the flow rate of gas and liquid is constant. The absorptivity increases gradually with the diminution of the ratio of plate spacing and diameter （H/D） when H/D is 0.8 and reaches a can not be normally performed due to the excessive pressure drop.