密相(xiang)气(qi)力输送(song)系列

气力输(shu)送原理

气(qi)(qi)力(li)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系统(tong)(tong)可分(fen)类(lei)为不(bu)同(tong)的(de)(de)(de)(de)(de)流(liu)动(dong)型(xing)式(shi)，其中(zhong)两种(zhong)主(zhu)要型(xing)式(shi)是(shi)(shi)(shi)(shi)：(a) 稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)和（b）密(mi)(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)每种(zhong)流(liu)动(dong)型(xing)式(shi)可按物料(liao)与空气(qi)(qi)的(de)(de)(de)(de)(de)流(liu)量(liang)比(bi)率(lv)大(da)小分(fen)类(lei)，其比(bi)率(lv)也(ye)被(bei)(bei)(bei)称(cheng)为“固气(qi)(qi)比(bi)”： μ=ms/mf (1)许多稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)运行范围为0＜μ＜15，而密(mi)(mi)相(xiang)(xiang)(xiang)通常(chang)是(shi)(shi)(shi)(shi)μ＞15。图1所示的(de)(de)(de)(de)(de)是(shi)(shi)(shi)(shi)典型(xing)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)状(zhuang)态(tai)图。稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)可以被(bei)(bei)(bei)认(ren)为是(shi)(shi)(shi)(shi)一(yi)种(zhong)完(wan)全的(de)(de)(de)(de)(de)悬(xuan)浮(fu)流(liu)，而密(mi)(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通常(chang)被(bei)(bei)(bei)认(ren)为是(shi)(shi)(shi)(shi)非悬(xuan)浮(fu)流(liu)。然而，如图1所示，许多不(bu)同(tong)种(zhong)类(lei)的(de)(de)(de)(de)(de)密(mi)(mi)相(xiang)(xiang)(xiang)（非悬(xuan)浮(fu)流(liu)）依(yi)靠(kao)散料(liao)的(de)(de)(de)(de)(de)料(liao)性和流(liu)动(dong)性存在。密(mi)(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)同(tong)样也(ye)能被(bei)(bei)(bei)定义为输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)物料(liao)完(wan)全填(tian)满管(guan)道(dao)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)一(yi)种(zhong)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)方(fang)式(shi)。稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通常(chang)需(xu)要使用(yong)(yong)大(da)量(liang)的(de)(de)(de)(de)(de)高速气(qi)(qi)体(ti)。气(qi)(qi)流(liu)依(yi)靠(kao)升(sheng)力(li)和推动(dong)力(li)以离散粒(li)子的(de)(de)(de)(de)(de)形(xing)式(shi)携带着物料(liao)。参(can)考图1中(zhong)所述的(de)(de)(de)(de)(de)“悬(xuan)浮(fu)流(liu)”，稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)系统(tong)(tong)通常(chang)是(shi)(shi)(shi)(shi)最(zui)为被(bei)(bei)(bei)广泛(fan)应用(yong)(yong)的(de)(de)(de)(de)(de)气(qi)(qi)力(li)输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系统(tong)(tong)。由(you)于(yu)稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)系统(tong)(tong)设计(ji)的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)对简单性，它(ta)们同(tong)时也(ye)被(bei)(bei)(bei)频繁的(de)(de)(de)(de)(de)应用(yong)(yong)在工(gong)业领域。输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)气(qi)(qi)体(ti)的(de)(de)(de)(de)(de)速度(du)(du)减少到(dao)比(bi)保(bao)持粒(li)子悬(xuan)浮(fu)状(zhuang)态(tai)的(de)(de)(de)(de)(de)临(lin)界值(zhi)更小时，导致物料(liao)在输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)管(guan)道(dao)的(de)(de)(de)(de)(de)横截(jie)面(mian)(mian)形(xing)成不(bu)均匀的(de)(de)(de)(de)(de)分(fen)布。临(lin)界气(qi)(qi)体(ti)速度(du)(du)被(bei)(bei)(bei)称(cheng)为是(shi)(shi)(shi)(shi)水(shui)平输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)(de)跳跃速度(du)(du)，垂直输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)时堵塞。当水(shui)平管(guan)道(dao)中(zhong)的(de)(de)(de)(de)(de)物料(liao)表面(mian)(mian)气(qi)(qi)体(ti)速度(du)(du)低(di)于(yu)突(tu)变速度(du)(du)时，输(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)将(jiang)会以低(di)流(liu)量(liang)通过管(guan)道(dao)横截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)上部(bu)，在管(guan)道(dao)的(de)(de)(de)(de)(de)剩余部(bu)分(fen)以高浓度(du)(du)低(di)速度(du)(du)的(de)(de)(de)(de)(de)形(xing)式(shi)填(tian)充。有时沿管(guan)道(dao)的(de)(de)(de)(de)(de)横截(jie)面(mian)(mian)会被(bei)(bei)(bei)填(tian)满，而有时只是(shi)(shi)(shi)(shi)部(bu)分(fen)被(bei)(bei)(bei)填(tian)满.

实际应用中, 按照气力(li)驱动形式可以(yi)分(fen)为(wei)负压和正压气力(li)输(shu)(shu)送(song)(song)(song), 在(zai)这两种输(shu)(shu)送(song)(song)(song)系(xi)(xi)统中, 根据流动状态图再区分(fen)分(fen)为(wei)稀相(xiang), 密相(xiang)和流化(hua)态输(shu)(shu)送(song)(song)(song)系(xi)(xi)统. 除此之(zhi)外,根据喂(wei)料不同(tong)分(fen)为(wei)连(lian)续和批次(ci)输(shu)(shu)送(song)(song)(song). 在(zai)高(gao)(gao)压密相(xiang)输(shu)(shu)送(song)(song)(song)技术中常采用批次(ci)的压力(li)罐进行高(gao)(gao)压输(shu)(shu)送(song)(song)(song), 同(tong)时, 可以(yi)组合(he)两个压力(li)罐设计(ji)达到连(lian)续的输(shu)(shu)送(song)(song)(song).

密相气力(li)输送特点(dian):

● 用气(qi)量小, 节能

● 无残留输送

● 不(bu)堵塞(sai), 运行(xing)可靠

● 维护费用低

● 适合于各类(lei)粉粒物料

● 压(ya)力至0. 6m p a可调

● 适(shi)合于柔性化自动生产中的物料高效输(shu)送