密相(xiang)气力(li)输送系列

气力输送原理

气(qi)(qi)力(li)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系统(tong)可(ke)(ke)分(fen)类为(wei)(wei)(wei)不(bu)同的(de)(de)(de)(de)(de)(de)流(liu)动(dong)(dong)(dong)型(xing)式(shi)，其(qi)中(zhong)两种(zhong)主要(yao)型(xing)式(shi)是(shi)：(a) 稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)和（b）密(mi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)每种(zhong)流(liu)动(dong)(dong)(dong)型(xing)式(shi)可(ke)(ke)按物料(liao)(liao)与(yu)空气(qi)(qi)的(de)(de)(de)(de)(de)(de)流(liu)量比(bi)率大小分(fen)类，其(qi)比(bi)率也(ye)被(bei)(bei)称(cheng)(cheng)为(wei)(wei)(wei)“固气(qi)(qi)比(bi)”： μ=ms/mf (1)许多(duo)稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)(de)运行范围为(wei)(wei)(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)(xiang)(xiang)通常是(shi)μ＞15。图1所示(shi)的(de)(de)(de)(de)(de)(de)是(shi)典型(xing)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)状(zhuang)态图。稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)可(ke)(ke)以(yi)被(bei)(bei)认为(wei)(wei)(wei)是(shi)一种(zhong)完全的(de)(de)(de)(de)(de)(de)悬(xuan)浮流(liu)，而(er)密(mi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常被(bei)(bei)认为(wei)(wei)(wei)是(shi)非悬(xuan)浮流(liu)。然(ran)而(er)，如图1所示(shi)，许多(duo)不(bu)同种(zhong)类的(de)(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)(xiang)（非悬(xuan)浮流(liu)）依靠(kao)散(san)料(liao)(liao)的(de)(de)(de)(de)(de)(de)料(liao)(liao)性(xing)和流(liu)动(dong)(dong)(dong)性(xing)存在。密(mi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)同样也(ye)能被(bei)(bei)定(ding)义为(wei)(wei)(wei)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)物料(liao)(liao)完全填(tian)满(man)(man)管道(dao)(dao)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)一种(zhong)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)方式(shi)。稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常需要(yao)使用大量的(de)(de)(de)(de)(de)(de)高速气(qi)(qi)体(ti)(ti)。气(qi)(qi)流(liu)依靠(kao)升(sheng)力(li)和推(tui)动(dong)(dong)(dong)力(li)以(yi)离散(san)粒子的(de)(de)(de)(de)(de)(de)形(xing)式(shi)携(xie)带着(zhe)物料(liao)(liao)。参考图1中(zhong)所述的(de)(de)(de)(de)(de)(de)“悬(xuan)浮流(liu)”，稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)系统(tong)通常是(shi)最(zui)为(wei)(wei)(wei)被(bei)(bei)广泛应用的(de)(de)(de)(de)(de)(de)气(qi)(qi)力(li)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系统(tong)。由(you)于(yu)稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)系统(tong)设计的(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)对简(jian)单性(xing)，它们同时(shi)也(ye)被(bei)(bei)频(pin)繁的(de)(de)(de)(de)(de)(de)应用在工业(ye)领域。输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)气(qi)(qi)体(ti)(ti)的(de)(de)(de)(de)(de)(de)速度减少(shao)到比(bi)保持粒子悬(xuan)浮状(zhuang)态的(de)(de)(de)(de)(de)(de)临界值(zhi)更小时(shi)，导致物料(liao)(liao)在输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)管道(dao)(dao)的(de)(de)(de)(de)(de)(de)横(heng)(heng)截(jie)面(mian)(mian)形(xing)成不(bu)均匀的(de)(de)(de)(de)(de)(de)分(fen)布。临界气(qi)(qi)体(ti)(ti)速度被(bei)(bei)称(cheng)(cheng)为(wei)(wei)(wei)是(shi)水平输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳跃速度，垂直输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)时(shi)堵塞(sai)。当(dang)水平管道(dao)(dao)中(zhong)的(de)(de)(de)(de)(de)(de)物料(liao)(liao)表面(mian)(mian)气(qi)(qi)体(ti)(ti)速度低(di)(di)于(yu)突变速度时(shi)，输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)将会(hui)以(yi)低(di)(di)流(liu)量通过(guo)管道(dao)(dao)横(heng)(heng)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)上部，在管道(dao)(dao)的(de)(de)(de)(de)(de)(de)剩余部分(fen)以(yi)高浓(nong)度低(di)(di)速度的(de)(de)(de)(de)(de)(de)形(xing)式(shi)填(tian)充。有时(shi)沿管道(dao)(dao)的(de)(de)(de)(de)(de)(de)横(heng)(heng)截(jie)面(mian)(mian)会(hui)被(bei)(bei)填(tian)满(man)(man)，而(er)有时(shi)只(zhi)是(shi)部分(fen)被(bei)(bei)填(tian)满(man)(man).

实(shi)际(ji)应(ying)用中, 按照气(qi)力(li)驱(qu)动(dong)形式可以分为负压(ya)(ya)和(he)(he)正压(ya)(ya)气(qi)力(li)输(shu)(shu)送(song)(song)(song), 在这两种(zhong)输(shu)(shu)送(song)(song)(song)系统中, 根据流动(dong)状(zhuang)态图(tu)再(zai)区(qu)分分为稀(xi)相, 密(mi)相和(he)(he)流化态输(shu)(shu)送(song)(song)(song)系统. 除此之(zhi)外,根据喂料不同分为连(lian)续和(he)(he)批(pi)次输(shu)(shu)送(song)(song)(song). 在高压(ya)(ya)密(mi)相输(shu)(shu)送(song)(song)(song)技(ji)术中常采用批(pi)次的压(ya)(ya)力(li)罐(guan)进行高压(ya)(ya)输(shu)(shu)送(song)(song)(song), 同时, 可以组(zu)合两个(ge)压(ya)(ya)力(li)罐(guan)设(she)计达(da)到连(lian)续的输(shu)(shu)送(song)(song)(song).

密(mi)相气(qi)力输(shu)送特点(dian):

● 用气量(liang)小, 节能(neng)

● 无残留输送

● 不堵(du)塞, 运行可靠

● 维护(hu)费(fei)用低

● 适(shi)合于各类粉(fen)粒(li)物料(liao)

● 压(ya)力至(zhi)0. 6m p a可调

● 适合于柔性化自(zi)动生产中(zhong)的物料高(gao)效输送