密相气力(li)输送系列

气力输送原理

气(qi)力(li)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系统(tong)可分(fen)类(lei)(lei)为(wei)不同(tong)的(de)(de)流(liu)动型(xing)式，其中两种(zhong)主要(yao)型(xing)式是(shi)：(a) 稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)和(he)(he)（b）密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)每种(zhong)流(liu)动型(xing)式可按物(wu)料(liao)与空气(qi)的(de)(de)流(liu)量(liang)比(bi)率(lv)(lv)大小分(fen)类(lei)(lei)，其比(bi)率(lv)(lv)也(ye)被(bei)(bei)称为(wei)“固气(qi)比(bi)”： μ=ms/mf (1)许多(duo)稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)(xiang)的(de)(de)运行范围为(wei)0＜μ＜15，而密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)通常(chang)是(shi)μ＞15。图(tu)1所示的(de)(de)是(shi)典型(xing)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)状态图(tu)。稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)可以(yi)被(bei)(bei)认(ren)为(wei)是(shi)一种(zhong)完全的(de)(de)悬(xuan)浮流(liu)，而密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常(chang)被(bei)(bei)认(ren)为(wei)是(shi)非悬(xuan)浮流(liu)。然而，如图(tu)1所示，许多(duo)不同(tong)种(zhong)类(lei)(lei)的(de)(de)密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)（非悬(xuan)浮流(liu)）依(yi)靠散料(liao)的(de)(de)料(liao)性和(he)(he)流(liu)动性存(cun)在(zai)(zai)。密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)同(tong)样也(ye)能被(bei)(bei)定(ding)义为(wei)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)物(wu)料(liao)完全填满(man)管道截(jie)面(mian)(mian)(mian)的(de)(de)一种(zhong)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)方式。稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常(chang)需要(yao)使用(yong)大量(liang)的(de)(de)高(gao)速(su)气(qi)体。气(qi)流(liu)依(yi)靠升力(li)和(he)(he)推动力(li)以(yi)离(li)散粒子的(de)(de)形式携带着物(wu)料(liao)。参考图(tu)1中所述的(de)(de)“悬(xuan)浮流(liu)”，稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)(xiang)系统(tong)通常(chang)是(shi)最(zui)为(wei)被(bei)(bei)广泛应用(yong)的(de)(de)气(qi)力(li)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系统(tong)。由于(yu)稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)(xiang)系统(tong)设计的(de)(de)相(xiang)(xiang)(xiang)(xiang)对简单性，它(ta)们同(tong)时(shi)(shi)也(ye)被(bei)(bei)频繁的(de)(de)应用(yong)在(zai)(zai)工业领域。输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)气(qi)体的(de)(de)速(su)度(du)(du)(du)减少到比(bi)保持粒子悬(xuan)浮状态的(de)(de)临(lin)界(jie)(jie)值更(geng)小时(shi)(shi)，导致(zhi)物(wu)料(liao)在(zai)(zai)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)管道的(de)(de)横截(jie)面(mian)(mian)(mian)形成不均匀的(de)(de)分(fen)布。临(lin)界(jie)(jie)气(qi)体速(su)度(du)(du)(du)被(bei)(bei)称为(wei)是(shi)水平(ping)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)的(de)(de)跳跃速(su)度(du)(du)(du)，垂直输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)时(shi)(shi)堵塞(sai)。当水平(ping)管道中的(de)(de)物(wu)料(liao)表面(mian)(mian)(mian)气(qi)体速(su)度(du)(du)(du)低(di)于(yu)突变速(su)度(du)(du)(du)时(shi)(shi)，输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)将会以(yi)低(di)流(liu)量(liang)通过管道横截(jie)面(mian)(mian)(mian)的(de)(de)上部，在(zai)(zai)管道的(de)(de)剩余部分(fen)以(yi)高(gao)浓(nong)度(du)(du)(du)低(di)速(su)度(du)(du)(du)的(de)(de)形式填充(chong)。有时(shi)(shi)沿管道的(de)(de)横截(jie)面(mian)(mian)(mian)会被(bei)(bei)填满(man)，而有时(shi)(shi)只是(shi)部分(fen)被(bei)(bei)填满(man).

实际(ji)应用中, 按照气力驱动形式(shi)可以(yi)分为负(fu)压(ya)和正压(ya)气力输(shu)送(song), 在这两(liang)种输(shu)送(song)系统中, 根(gen)据(ju)流(liu)动状态图(tu)再区分分为稀相, 密(mi)相和流(liu)化态输(shu)送(song)系统. 除此(ci)之外,根(gen)据(ju)喂料不同分为连续和批次输(shu)送(song). 在高(gao)压(ya)密(mi)相输(shu)送(song)技术中常采用批次的压(ya)力罐进行(xing)高(gao)压(ya)输(shu)送(song), 同时, 可以(yi)组合(he)两(liang)个压(ya)力罐设计达到连续的输(shu)送(song).

密相气力输送特(te)点:

● 用(yong)气量(liang)小, 节能

● 无残留(liu)输送

● 不堵塞, 运行可靠

● 维护费(fei)用低

● 适合于(yu)各(ge)类粉粒物料

● 压力至0. 6m p a可调

● 适合于柔性化(hua)自动生产(chan)中的物料高效输送