密相(xiang)气力输(shu)送系列(lie)

气力输送(song)原理

气(qi)(qi)力(li)(li)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)系(xi)统(tong)可(ke)分(fen)(fen)类(lei)为(wei)(wei)不同(tong)(tong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)流(liu)动型(xing)式(shi)，其中两种(zhong)主要型(xing)式(shi)是(shi)(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)和（b）密相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)每种(zhong)流(liu)动型(xing)式(shi)可(ke)按物(wu)(wu)料(liao)(liao)与空气(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)流(liu)量比(bi)率大(da)小(xiao)分(fen)(fen)类(lei)，其比(bi)率也(ye)被(bei)(bei)(bei)称为(wei)(wei)“固(gu)气(qi)(qi)比(bi)”： μ=ms/mf (1)许(xu)多(duo)稀(xi)相(xiang)(xiang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)运行范围为(wei)(wei)0＜μ＜15，而密相(xiang)(xiang)通(tong)(tong)常(chang)是(shi)(shi)(shi)μ＞15。图1所(suo)示的(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)典型(xing)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)状(zhuang)态图。稀(xi)相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)可(ke)以被(bei)(bei)(bei)认为(wei)(wei)是(shi)(shi)(shi)一(yi)种(zhong)完全的(de)(de)(de)(de)(de)(de)(de)(de)(de)悬(xuan)(xuan)浮(fu)流(liu)，而密相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)通(tong)(tong)常(chang)被(bei)(bei)(bei)认为(wei)(wei)是(shi)(shi)(shi)非(fei)悬(xuan)(xuan)浮(fu)流(liu)。然而，如图1所(suo)示，许(xu)多(duo)不同(tong)(tong)种(zhong)类(lei)的(de)(de)(de)(de)(de)(de)(de)(de)(de)密相(xiang)(xiang)（非(fei)悬(xuan)(xuan)浮(fu)流(liu)）依靠散(san)料(liao)(liao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)料(liao)(liao)性(xing)和流(liu)动性(xing)存(cun)在。密相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)同(tong)(tong)样也(ye)能被(bei)(bei)(bei)定(ding)义为(wei)(wei)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)物(wu)(wu)料(liao)(liao)完全填(tian)满管(guan)道(dao)截面的(de)(de)(de)(de)(de)(de)(de)(de)(de)一(yi)种(zhong)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)方(fang)式(shi)。稀(xi)相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)通(tong)(tong)常(chang)需要使用(yong)大(da)量的(de)(de)(de)(de)(de)(de)(de)(de)(de)高速(su)(su)气(qi)(qi)体。气(qi)(qi)流(liu)依靠升力(li)(li)和推(tui)动力(li)(li)以离(li)散(san)粒子的(de)(de)(de)(de)(de)(de)(de)(de)(de)形(xing)式(shi)携带(dai)着(zhe)物(wu)(wu)料(liao)(liao)。参考图1中所(suo)述的(de)(de)(de)(de)(de)(de)(de)(de)(de)“悬(xuan)(xuan)浮(fu)流(liu)”，稀(xi)相(xiang)(xiang)系(xi)统(tong)通(tong)(tong)常(chang)是(shi)(shi)(shi)最为(wei)(wei)被(bei)(bei)(bei)广泛应用(yong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)气(qi)(qi)力(li)(li)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)系(xi)统(tong)。由于稀(xi)相(xiang)(xiang)系(xi)统(tong)设计的(de)(de)(de)(de)(de)(de)(de)(de)(de)相(xiang)(xiang)对简单(dan)性(xing)，它(ta)们同(tong)(tong)时(shi)(shi)也(ye)被(bei)(bei)(bei)频繁的(de)(de)(de)(de)(de)(de)(de)(de)(de)应用(yong)在工业领域。输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)气(qi)(qi)体的(de)(de)(de)(de)(de)(de)(de)(de)(de)速(su)(su)度(du)(du)(du)减少到比(bi)保持粒子悬(xuan)(xuan)浮(fu)状(zhuang)态的(de)(de)(de)(de)(de)(de)(de)(de)(de)临(lin)界值更小(xiao)时(shi)(shi)，导致(zhi)物(wu)(wu)料(liao)(liao)在输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)管(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)横(heng)截面形(xing)成不均匀的(de)(de)(de)(de)(de)(de)(de)(de)(de)分(fen)(fen)布。临(lin)界气(qi)(qi)体速(su)(su)度(du)(du)(du)被(bei)(bei)(bei)称为(wei)(wei)是(shi)(shi)(shi)水平(ping)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)(de)(de)(de)跳跃速(su)(su)度(du)(du)(du)，垂直输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)时(shi)(shi)堵塞。当水平(ping)管(guan)道(dao)中的(de)(de)(de)(de)(de)(de)(de)(de)(de)物(wu)(wu)料(liao)(liao)表面气(qi)(qi)体速(su)(su)度(du)(du)(du)低于突变速(su)(su)度(du)(du)(du)时(shi)(shi)，输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)将(jiang)会以低流(liu)量通(tong)(tong)过管(guan)道(dao)横(heng)截面的(de)(de)(de)(de)(de)(de)(de)(de)(de)上部，在管(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)剩(sheng)余部分(fen)(fen)以高浓度(du)(du)(du)低速(su)(su)度(du)(du)(du)的(de)(de)(de)(de)(de)(de)(de)(de)(de)形(xing)式(shi)填(tian)充。有时(shi)(shi)沿(yan)管(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)横(heng)截面会被(bei)(bei)(bei)填(tian)满，而有时(shi)(shi)只是(shi)(shi)(shi)部分(fen)(fen)被(bei)(bei)(bei)填(tian)满.

实际应用中, 按照气(qi)力(li)驱动形式可以分为负(fu)压(ya)(ya)和正压(ya)(ya)气(qi)力(li)输(shu)送(song)(song)(song), 在(zai)这(zhei)两种输(shu)送(song)(song)(song)系统中, 根据流(liu)动状态图再区分分为稀相, 密相和流(liu)化态输(shu)送(song)(song)(song)系统. 除此(ci)之外,根据喂料(liao)不(bu)同分为连(lian)续和批次(ci)输(shu)送(song)(song)(song). 在(zai)高压(ya)(ya)密相输(shu)送(song)(song)(song)技(ji)术(shu)中常采用批次(ci)的压(ya)(ya)力(li)罐进行(xing)高压(ya)(ya)输(shu)送(song)(song)(song), 同时, 可以组合两个压(ya)(ya)力(li)罐设计达到(dao)连(lian)续的输(shu)送(song)(song)(song).

密相气力输送特点(dian):

● 用气量(liang)小, 节能

● 无残留输送

● 不堵(du)塞, 运(yun)行可靠(kao)

● 维护费用低

● 适合于各类粉粒物料

● 压(ya)力至0. 6m p a可(ke)调

● 适(shi)合于(yu)柔性化自动(dong)生产中的物料高效输送