密相气力输(shu)送(song)系(xi)列

气力(li)输送原(yuan)理

气(qi)力(li)(li)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系(xi)统(tong)可分(fen)类(lei)为(wei)(wei)(wei)不(bu)(bu)同(tong)的(de)(de)(de)(de)(de)流(liu)动(dong)型(xing)式(shi)(shi)(shi)，其中两(liang)种主要型(xing)式(shi)(shi)(shi)是(shi)(shi)(shi)：(a) 稀(xi)相(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)和(he)（b）密(mi)(mi)相(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)每种流(liu)动(dong)型(xing)式(shi)(shi)(shi)可按物(wu)(wu)料(liao)与(yu)空气(qi)的(de)(de)(de)(de)(de)流(liu)量(liang)比率大小分(fen)类(lei)，其比率也(ye)被称为(wei)(wei)(wei)“固(gu)气(qi)比”： μ=ms/mf (1)许(xu)多稀(xi)相(xiang)的(de)(de)(de)(de)(de)运行范(fan)围为(wei)(wei)(wei)0＜μ＜15，而密(mi)(mi)相(xiang)通(tong)常(chang)(chang)是(shi)(shi)(shi)μ＞15。图1所(suo)(suo)(suo)示(shi)(shi)的(de)(de)(de)(de)(de)是(shi)(shi)(shi)典型(xing)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)状态图。稀(xi)相(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)可以被认为(wei)(wei)(wei)是(shi)(shi)(shi)一种完(wan)全(quan)的(de)(de)(de)(de)(de)悬(xuan)浮流(liu)，而密(mi)(mi)相(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)常(chang)(chang)被认为(wei)(wei)(wei)是(shi)(shi)(shi)非(fei)(fei)悬(xuan)浮流(liu)。然而，如图1所(suo)(suo)(suo)示(shi)(shi)，许(xu)多不(bu)(bu)同(tong)种类(lei)的(de)(de)(de)(de)(de)密(mi)(mi)相(xiang)（非(fei)(fei)悬(xuan)浮流(liu)）依靠散料(liao)的(de)(de)(de)(de)(de)料(liao)性和(he)流(liu)动(dong)性存在(zai)(zai)。密(mi)(mi)相(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)同(tong)样也(ye)能(neng)被定义为(wei)(wei)(wei)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)物(wu)(wu)料(liao)完(wan)全(quan)填(tian)(tian)满(man)管(guan)道截(jie)面的(de)(de)(de)(de)(de)一种输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)方式(shi)(shi)(shi)。稀(xi)相(xiang)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)常(chang)(chang)需要使用大量(liang)的(de)(de)(de)(de)(de)高(gao)(gao)速(su)气(qi)体(ti)。气(qi)流(liu)依靠升力(li)(li)和(he)推动(dong)力(li)(li)以离散粒子的(de)(de)(de)(de)(de)形(xing)式(shi)(shi)(shi)携带着物(wu)(wu)料(liao)。参考图1中所(suo)(suo)(suo)述的(de)(de)(de)(de)(de)“悬(xuan)浮流(liu)”，稀(xi)相(xiang)系(xi)统(tong)通(tong)常(chang)(chang)是(shi)(shi)(shi)最为(wei)(wei)(wei)被广泛应(ying)用的(de)(de)(de)(de)(de)气(qi)力(li)(li)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系(xi)统(tong)。由于(yu)(yu)稀(xi)相(xiang)系(xi)统(tong)设计(ji)的(de)(de)(de)(de)(de)相(xiang)对简单性，它(ta)们(men)同(tong)时也(ye)被频繁的(de)(de)(de)(de)(de)应(ying)用在(zai)(zai)工(gong)业领域。输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)气(qi)体(ti)的(de)(de)(de)(de)(de)速(su)度减少到比保持粒子悬(xuan)浮状态的(de)(de)(de)(de)(de)临界值更(geng)小时，导致物(wu)(wu)料(liao)在(zai)(zai)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)管(guan)道的(de)(de)(de)(de)(de)横截(jie)面形(xing)成不(bu)(bu)均(jun)匀的(de)(de)(de)(de)(de)分(fen)布。临界气(qi)体(ti)速(su)度被称为(wei)(wei)(wei)是(shi)(shi)(shi)水平输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)(de)跳(tiao)跃速(su)度，垂直(zhi)输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)时堵塞。当水平管(guan)道中的(de)(de)(de)(de)(de)物(wu)(wu)料(liao)表面气(qi)体(ti)速(su)度低(di)(di)于(yu)(yu)突变速(su)度时，输(shu)(shu)(shu)(shu)送(song)(song)(song)(song)将(jiang)会(hui)以低(di)(di)流(liu)量(liang)通(tong)过(guo)管(guan)道横截(jie)面的(de)(de)(de)(de)(de)上(shang)部(bu)，在(zai)(zai)管(guan)道的(de)(de)(de)(de)(de)剩余部(bu)分(fen)以高(gao)(gao)浓度低(di)(di)速(su)度的(de)(de)(de)(de)(de)形(xing)式(shi)(shi)(shi)填(tian)(tian)充。有时沿管(guan)道的(de)(de)(de)(de)(de)横截(jie)面会(hui)被填(tian)(tian)满(man)，而有时只是(shi)(shi)(shi)部(bu)分(fen)被填(tian)(tian)满(man).

实际应用(yong)中(zhong)(zhong), 按照气(qi)力(li)驱动(dong)形(xing)式(shi)可以(yi)分(fen)为负压(ya)和正压(ya)气(qi)力(li)输(shu)(shu)送(song)(song), 在这(zhei)两(liang)种(zhong)输(shu)(shu)送(song)(song)系统中(zhong)(zhong), 根据(ju)(ju)流(liu)动(dong)状态图再(zai)区(qu)分(fen)分(fen)为稀相(xiang)(xiang), 密相(xiang)(xiang)和流(liu)化态输(shu)(shu)送(song)(song)系统. 除此之外,根据(ju)(ju)喂料不同(tong)分(fen)为连续和批次输(shu)(shu)送(song)(song). 在高压(ya)密相(xiang)(xiang)输(shu)(shu)送(song)(song)技术(shu)中(zhong)(zhong)常(chang)采用(yong)批次的压(ya)力(li)罐进行(xing)高压(ya)输(shu)(shu)送(song)(song), 同(tong)时, 可以(yi)组合两(liang)个压(ya)力(li)罐设计达到(dao)连续的输(shu)(shu)送(song)(song).

密相(xiang)气力输送(song)特点:

● 用气量小, 节(jie)能

● 无残留输送(song)

● 不堵塞, 运行(xing)可(ke)靠

● 维护费(fei)用低

● 适合于各类粉粒物料(liao)

● 压(ya)力至0. 6m p a可(ke)调(diao)

● 适合于(yu)柔性(xing)化自动生产中(zhong)的物料高(gao)效输送