密相(xiang)气(qi)力输送(song)系列

气力输(shu)送原理

气(qi)(qi)(qi)力输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系(xi)统可分(fen)(fen)类为(wei)(wei)不同(tong)(tong)的(de)(de)(de)(de)(de)流(liu)(liu)动(dong)型(xing)式(shi)，其(qi)中(zhong)两(liang)种(zhong)主要(yao)(yao)型(xing)式(shi)是(shi)(shi)：(a) 稀相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)和（b）密(mi)相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)每种(zhong)流(liu)(liu)动(dong)型(xing)式(shi)可按(an)物(wu)(wu)料(liao)(liao)(liao)与空气(qi)(qi)(qi)的(de)(de)(de)(de)(de)流(liu)(liu)量比(bi)率大小分(fen)(fen)类，其(qi)比(bi)率也被称为(wei)(wei)“固(gu)气(qi)(qi)(qi)比(bi)”： μ=ms/mf (1)许多(duo)稀相(xiang)(xiang)的(de)(de)(de)(de)(de)运行范围为(wei)(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)通常(chang)是(shi)(shi)μ＞15。图1所示(shi)的(de)(de)(de)(de)(de)是(shi)(shi)典型(xing)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)状(zhuang)态(tai)图。稀相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)可以被认(ren)为(wei)(wei)是(shi)(shi)一(yi)种(zhong)完全的(de)(de)(de)(de)(de)悬浮(fu)流(liu)(liu)，而(er)密(mi)相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常(chang)被认(ren)为(wei)(wei)是(shi)(shi)非悬浮(fu)流(liu)(liu)。然而(er)，如图1所示(shi)，许多(duo)不同(tong)(tong)种(zhong)类的(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)（非悬浮(fu)流(liu)(liu)）依(yi)靠散料(liao)(liao)(liao)的(de)(de)(de)(de)(de)料(liao)(liao)(liao)性(xing)和流(liu)(liu)动(dong)性(xing)存(cun)在(zai)(zai)。密(mi)相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)同(tong)(tong)样也能(neng)被定义(yi)为(wei)(wei)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)物(wu)(wu)料(liao)(liao)(liao)完全填(tian)满管(guan)道截(jie)(jie)面的(de)(de)(de)(de)(de)一(yi)种(zhong)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)方式(shi)。稀相(xiang)(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常(chang)需要(yao)(yao)使用(yong)大量的(de)(de)(de)(de)(de)高速(su)(su)(su)气(qi)(qi)(qi)体。气(qi)(qi)(qi)流(liu)(liu)依(yi)靠升力和推动(dong)力以离散粒子的(de)(de)(de)(de)(de)形(xing)式(shi)携带着物(wu)(wu)料(liao)(liao)(liao)。参考图1中(zhong)所述的(de)(de)(de)(de)(de)“悬浮(fu)流(liu)(liu)”，稀相(xiang)(xiang)系(xi)统通常(chang)是(shi)(shi)最(zui)为(wei)(wei)被广泛应用(yong)的(de)(de)(de)(de)(de)气(qi)(qi)(qi)力输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系(xi)统。由于稀相(xiang)(xiang)系(xi)统设(she)计(ji)的(de)(de)(de)(de)(de)相(xiang)(xiang)对简(jian)单性(xing)，它们同(tong)(tong)时(shi)(shi)也被频(pin)繁的(de)(de)(de)(de)(de)应用(yong)在(zai)(zai)工(gong)业领域。输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)气(qi)(qi)(qi)体的(de)(de)(de)(de)(de)速(su)(su)(su)度减(jian)少到(dao)比(bi)保(bao)持(chi)粒子悬浮(fu)状(zhuang)态(tai)的(de)(de)(de)(de)(de)临(lin)(lin)界(jie)值更小时(shi)(shi)，导致物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)管(guan)道的(de)(de)(de)(de)(de)横截(jie)(jie)面形(xing)成不均匀的(de)(de)(de)(de)(de)分(fen)(fen)布。临(lin)(lin)界(jie)气(qi)(qi)(qi)体速(su)(su)(su)度被称为(wei)(wei)是(shi)(shi)水平输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)跳跃速(su)(su)(su)度，垂直输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)时(shi)(shi)堵塞。当水平管(guan)道中(zhong)的(de)(de)(de)(de)(de)物(wu)(wu)料(liao)(liao)(liao)表(biao)面气(qi)(qi)(qi)体速(su)(su)(su)度低于突变速(su)(su)(su)度时(shi)(shi)，输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)将会以低流(liu)(liu)量通过管(guan)道横截(jie)(jie)面的(de)(de)(de)(de)(de)上(shang)部(bu)(bu)，在(zai)(zai)管(guan)道的(de)(de)(de)(de)(de)剩余部(bu)(bu)分(fen)(fen)以高浓度低速(su)(su)(su)度的(de)(de)(de)(de)(de)形(xing)式(shi)填(tian)充。有时(shi)(shi)沿管(guan)道的(de)(de)(de)(de)(de)横截(jie)(jie)面会被填(tian)满，而(er)有时(shi)(shi)只(zhi)是(shi)(shi)部(bu)(bu)分(fen)(fen)被填(tian)满.

实际应用中, 按照气力驱(qu)动形式可以分(fen)(fen)为(wei)负压和正压气力输送(song)(song), 在(zai)这两种输送(song)(song)系统中, 根(gen)据流动状态(tai)图再区分(fen)(fen)分(fen)(fen)为(wei)稀相(xiang)(xiang), 密相(xiang)(xiang)和流化态(tai)输送(song)(song)系统. 除此之外(wai),根(gen)据喂料不同(tong)分(fen)(fen)为(wei)连续和批次输送(song)(song). 在(zai)高压密相(xiang)(xiang)输送(song)(song)技术中常(chang)采用批次的压力罐进行高压输送(song)(song), 同(tong)时, 可以组合两个(ge)压力罐设计达到连续的输送(song)(song).

密(mi)相气力(li)输送特点(dian):

● 用气量小, 节能

● 无(wu)残(can)留输送

● 不堵塞, 运行可(ke)靠

● 维护费用低

● 适合于各类粉粒物料

● 压力(li)至0. 6m p a可调(diao)

● 适合于柔性化自动生产中的物料高(gao)效输(shu)送