折流式旋轉(zhuǎn)床氣液比表面積的實(shí)驗(yàn)研究及CFD模擬
[Abstract]:The specific surface area of gas-liquid plays a key role in mass transfer of (RZB). In this paper, the gas-liquid specific surface area of a baffled rotating bed is studied by means of chemical absorption of CO_2 from mixed gas by NaOH solution. The flow behavior of liquid in rotor is simulated by computational fluid dynamics (CFD) technique. The effects of rotor speed, gas flow rate and liquid flow rate on the specific surface area of gas and liquid are analyzed. The results show that the specific surface area of the zigzag rotating bed is in the range of 100~350m~2/m~3. The gas-liquid specific surface area of the baffled rotating bed increases with the increase of the liquid content, and increases obviously with the increase of the gas content. CFD simulation shows that the number of droplets between the static and static rings increases obviously with the increase of the liquid volume, and more surfaces are covered by liquid film on the static ring. With the increase of gas volume, more liquids are broken into small liquids, and the number of droplets increases exponentially. With the increase of rotational speed, the shear force and centrifugal force applied to the liquid by the moving ring increase, the liquid is better dispersed, and the size of the droplet leaving the moving ring becomes smaller. RZB is compared with the gas-liquid specific surface area of the other type of filled rotating bed (RPB). It is found that the specific surface area of RZB is lower than that of RPB, conventional stainless steel mesh RPB, nickel foam filler RPB, new type multi-blade rotor RPB, is close to that of plate packing and baffle PRB..
【作者單位】: 浙江工業(yè)大學(xué)化學(xué)工程學(xué)院浙江省生物燃料利用技術(shù)研究重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】:TQ051.1
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