液幕式湿法脱硫中喷嘴竖直射流液体回落特性实验

Experiments on Falling-back Characteristics of an Upright-jet-flow Liquid from Nozzles in Liquid-curtain Type Wet-method Desulfurization

在液幕式湿法脱硫中,竖直射流回落液量分布情况直接决定脱硫效率。研究了3种型线喷嘴竖直射流液体回落的分布规律和射流高度与喷射压力关系。根据实验数据,推导出了"回落液幕无量纲体积流率公式"。实验中发现,不同型线喷嘴的回落液体分布规律差别不大,因为同样射流高度下,推导的公式中参数A、n和R0很接近。拟合出射流高度和喷射压力以及无量纲平均半径和射流高度关联式。通过喷嘴组实验,证明喷嘴组回落液量可视作多个单喷嘴同时射流回落液量简单叠加,且分布均匀性是喷嘴间距和射流高度的函数。

During the liquid curtain type wet-method desulfurization the distribution of the falling-back liquid quantity of an upright-jet-flow directly determines the desulfurization efficiency.The distribution law of the upright jet-flow falling-back liquid from three kinds of nozzle profile and the relationship between the jet flow height and jet pressure have been studied.On the basis of the experimental data,derived was the 'non-dimensional volume-flow rate formula of a falling-back liquid curtain'.It has been found during the experiment that the distribution law of the falling-back liquid in different nozzle profiles differ relatively little,because at a same jet flow height,the parameters A,n and R0 derived from the formula very approximate to one another.Formulae showing the correlation of jet flow height and jet pressure as well as non-dimensional averaged radius and jet flow height have undergone a fitting.Through experiments of the nozzle groups it has been proven that the falling-back liquid quantity of the nozzle groups can be regarded as a simple superimposition of jet flow falling-back liquid quantity obtained simultaneously from many a single nozzle,and the distribution uniformity is a function of the nozzle spacing and jet flow height.