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发布时间: 人气: function tag_arcclick(aid) { var ajax = new XMLHttpRequest(); ajax.open("get", "/index.php?m=api&c=Ajax&a=arcclick&aid="+aid+"&type=view", true); ajax.setRequestHeader("X-Requested-With","XMLHttpRequest"); ajax.setRequestHeader("Content-type","application/x-www-form-urlencoded"); ajax.send(); ajax.onreadystatechange = function () { if (ajax.readyState==4 && ajax.status==200) {     document.getElementById("eyou_arcclick_1708933756_"+aid).innerHTML = ajax.responseText;  } } }
案例介绍

密相输送是气流输送固体粉粒体输送物料的过程,如果管线中颗粒流的密度接近于临界流化状态下的床层密度,则称为密相输送密相渝送所需要的气体流量小,一般单位质量的空气所输送的物料质大。

 稀相输送是即管内高速气体将粉状物料彼此分散、悬浮在气流中进行输送。它的输送距离不长,一般小于100米。稀相输送主要有真空吸引式和压送式两种。下面我们来说说气力输送中密相输送与稀相输送区别是什么? 

密相输送是用高压气体压送物料,气源压力可高达0.7MPa,密相输送的特点是低风量和高固气比,物料在管内呈流化态或柱塞状运动。输送能力大,输送距离长,可达100~1000m。

 密相输送分为发送罐输送和旋转阀输送。发送罐输送是通过将发送罐加压至一定压力,采用切换出料阀及气刀对物料进行分配来实现输送的。这种输送气流速度较低而固气比较高,输送气压力较高。输送气体常采用空气或氮气,动力一般由压缩机提供。主要特点为输送速度低,对物料品质影响较小。旋转阀密相输送是采用稀相正压输送方式,而动力采用压缩机提供。系统具有较高压力、较低流速但输送能力大,对物料几乎无影响。


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