密相气力输送系列

气力(li)输送原理

气(qi)(qi)(qi)力(li)输(shu)(shu)(shu)送(song)(song)系(xi)(xi)统可分类为(wei)不(bu)(bu)同的(de)(de)(de)(de)流(liu)动(dong)型(xing)式(shi)，其中两(liang)种主要型(xing)式(shi)是(shi)：(a) 稀相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)和(he)（b）密(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)每种流(liu)动(dong)型(xing)式(shi)可按(an)物料与(yu)空气(qi)(qi)(qi)的(de)(de)(de)(de)流(liu)量(liang)比率大小(xiao)(xiao)分类，其比率也被(bei)(bei)称为(wei)“固气(qi)(qi)(qi)比”： μ=ms/mf (1)许(xu)多稀相(xiang)(xiang)(xiang)的(de)(de)(de)(de)运行范围为(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)(xiang)通(tong)常(chang)是(shi)μ＞15。图(tu)1所示的(de)(de)(de)(de)是(shi)典型(xing)输(shu)(shu)(shu)送(song)(song)状态图(tu)。稀相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)可以(yi)(yi)被(bei)(bei)认为(wei)是(shi)一种完(wan)全的(de)(de)(de)(de)悬(xuan)(xuan)浮(fu)流(liu)，而(er)密(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)通(tong)常(chang)被(bei)(bei)认为(wei)是(shi)非(fei)悬(xuan)(xuan)浮(fu)流(liu)。然(ran)而(er)，如图(tu)1所示，许(xu)多不(bu)(bu)同种类的(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)（非(fei)悬(xuan)(xuan)浮(fu)流(liu)）依靠散料的(de)(de)(de)(de)料性和(he)流(liu)动(dong)性存在(zai)(zai)。密(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)同样也能被(bei)(bei)定义(yi)为(wei)输(shu)(shu)(shu)送(song)(song)物料完(wan)全填(tian)(tian)满管道截(jie)面的(de)(de)(de)(de)一种输(shu)(shu)(shu)送(song)(song)方式(shi)。稀相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)通(tong)常(chang)需要使(shi)用大量(liang)的(de)(de)(de)(de)高速气(qi)(qi)(qi)体(ti)。气(qi)(qi)(qi)流(liu)依靠升力(li)和(he)推动(dong)力(li)以(yi)(yi)离散粒(li)子的(de)(de)(de)(de)形(xing)(xing)式(shi)携带着物料。参考(kao)图(tu)1中所述(shu)的(de)(de)(de)(de)“悬(xuan)(xuan)浮(fu)流(liu)”，稀相(xiang)(xiang)(xiang)系(xi)(xi)统通(tong)常(chang)是(shi)最为(wei)被(bei)(bei)广泛应用的(de)(de)(de)(de)气(qi)(qi)(qi)力(li)输(shu)(shu)(shu)送(song)(song)系(xi)(xi)统。由于稀相(xiang)(xiang)(xiang)系(xi)(xi)统设计(ji)的(de)(de)(de)(de)相(xiang)(xiang)(xiang)对简单性，它们同时(shi)(shi)也被(bei)(bei)频繁的(de)(de)(de)(de)应用在(zai)(zai)工(gong)业领(ling)域。输(shu)(shu)(shu)送(song)(song)气(qi)(qi)(qi)体(ti)的(de)(de)(de)(de)速度(du)(du)减少到比保持(chi)粒(li)子悬(xuan)(xuan)浮(fu)状态的(de)(de)(de)(de)临(lin)界(jie)值更小(xiao)(xiao)时(shi)(shi)，导致物料在(zai)(zai)输(shu)(shu)(shu)送(song)(song)管道的(de)(de)(de)(de)横截(jie)面形(xing)(xing)成不(bu)(bu)均匀的(de)(de)(de)(de)分布。临(lin)界(jie)气(qi)(qi)(qi)体(ti)速度(du)(du)被(bei)(bei)称为(wei)是(shi)水平输(shu)(shu)(shu)送(song)(song)的(de)(de)(de)(de)跳跃速度(du)(du)，垂(chui)直(zhi)输(shu)(shu)(shu)送(song)(song)时(shi)(shi)堵(du)塞(sai)。当水平管道中的(de)(de)(de)(de)物料表面气(qi)(qi)(qi)体(ti)速度(du)(du)低于突(tu)变速度(du)(du)时(shi)(shi)，输(shu)(shu)(shu)送(song)(song)将会以(yi)(yi)低流(liu)量(liang)通(tong)过管道横截(jie)面的(de)(de)(de)(de)上部(bu)(bu)，在(zai)(zai)管道的(de)(de)(de)(de)剩余部(bu)(bu)分以(yi)(yi)高浓度(du)(du)低速度(du)(du)的(de)(de)(de)(de)形(xing)(xing)式(shi)填(tian)(tian)充。有(you)时(shi)(shi)沿管道的(de)(de)(de)(de)横截(jie)面会被(bei)(bei)填(tian)(tian)满，而(er)有(you)时(shi)(shi)只是(shi)部(bu)(bu)分被(bei)(bei)填(tian)(tian)满.

实际(ji)应用中(zhong), 按照(zhao)气(qi)力驱动形式可以分为负压(ya)和正压(ya)气(qi)力输(shu)(shu)送(song), 在这(zhei)两种输(shu)(shu)送(song)系(xi)统中(zhong), 根据(ju)流(liu)(liu)动状(zhuang)态图再区分分为稀相, 密相和流(liu)(liu)化态输(shu)(shu)送(song)系(xi)统. 除(chu)此(ci)之外,根据(ju)喂料不(bu)同(tong)分为连续(xu)和批次(ci)输(shu)(shu)送(song). 在高压(ya)密相输(shu)(shu)送(song)技(ji)术中(zhong)常采用批次(ci)的压(ya)力罐进行高压(ya)输(shu)(shu)送(song), 同(tong)时, 可以组合两个(ge)压(ya)力罐设(she)计达到连续(xu)的输(shu)(shu)送(song).

密相气力输(shu)送特点:

● 用气量(liang)小(xiao), 节能

● 无残留输(shu)送

● 不(bu)堵塞(sai), 运行可靠

● 维护(hu)费用(yong)低

● 适合于各类粉粒物料

● 压力至0. 6m p a可调

● 适合于柔(rou)性化自动生产中的(de)物(wu)料高效输(shu)送