密相气力输送系列

气(qi)力输送原理

气(qi)(qi)力(li)输(shu)(shu)(shu)送(song)(song)(song)系(xi)统可分(fen)类为不(bu)同的(de)(de)(de)流(liu)(liu)(liu)动型(xing)(xing)式(shi)(shi)(shi)，其(qi)中两种(zhong)(zhong)主(zhu)要型(xing)(xing)式(shi)(shi)(shi)是：(a) 稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)(song)和(he)(he)（b）密(mi)(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)(song)每种(zhong)(zhong)流(liu)(liu)(liu)动型(xing)(xing)式(shi)(shi)(shi)可按物料与(yu)空气(qi)(qi)的(de)(de)(de)流(liu)(liu)(liu)量(liang)比(bi)率大小分(fen)类，其(qi)比(bi)率也(ye)被称(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)运行范围为0＜μ＜15，而密(mi)(mi)相(xiang)(xiang)(xiang)通(tong)(tong)常(chang)(chang)是μ＞15。图(tu)1所示(shi)的(de)(de)(de)是典(dian)型(xing)(xing)输(shu)(shu)(shu)送(song)(song)(song)状态图(tu)。稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)(song)可以(yi)被认(ren)为是一(yi)种(zhong)(zhong)完(wan)全的(de)(de)(de)悬浮(fu)(fu)流(liu)(liu)(liu)，而密(mi)(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)(song)通(tong)(tong)常(chang)(chang)被认(ren)为是非(fei)悬浮(fu)(fu)流(liu)(liu)(liu)。然而，如图(tu)1所示(shi)，许多不(bu)同种(zhong)(zhong)类的(de)(de)(de)密(mi)(mi)相(xiang)(xiang)(xiang)（非(fei)悬浮(fu)(fu)流(liu)(liu)(liu)）依靠(kao)(kao)散料的(de)(de)(de)料性(xing)和(he)(he)流(liu)(liu)(liu)动性(xing)存在。密(mi)(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)(song)同样也(ye)能(neng)被定义(yi)为输(shu)(shu)(shu)送(song)(song)(song)物料完(wan)全填满(man)管(guan)道(dao)(dao)截面(mian)的(de)(de)(de)一(yi)种(zhong)(zhong)输(shu)(shu)(shu)送(song)(song)(song)方(fang)式(shi)(shi)(shi)。稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)送(song)(song)(song)通(tong)(tong)常(chang)(chang)需要使(shi)用大量(liang)的(de)(de)(de)高速(su)(su)气(qi)(qi)体(ti)。气(qi)(qi)流(liu)(liu)(liu)依靠(kao)(kao)升力(li)和(he)(he)推动力(li)以(yi)离散粒(li)子的(de)(de)(de)形式(shi)(shi)(shi)携带(dai)着(zhe)物料。参(can)考(kao)图(tu)1中所述的(de)(de)(de)“悬浮(fu)(fu)流(liu)(liu)(liu)”，稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)系(xi)统通(tong)(tong)常(chang)(chang)是最为被广泛应用的(de)(de)(de)气(qi)(qi)力(li)输(shu)(shu)(shu)送(song)(song)(song)系(xi)统。由于(yu)稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)系(xi)统设计的(de)(de)(de)相(xiang)(xiang)(xiang)对(dui)简单性(xing)，它们同时也(ye)被频繁的(de)(de)(de)应用在工业领域(yu)。输(shu)(shu)(shu)送(song)(song)(song)气(qi)(qi)体(ti)的(de)(de)(de)速(su)(su)度减少(shao)到(dao)比(bi)保(bao)持粒(li)子悬浮(fu)(fu)状态的(de)(de)(de)临界值(zhi)更小时，导致物料在输(shu)(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)的(de)(de)(de)横(heng)截面(mian)形成(cheng)不(bu)均匀的(de)(de)(de)分(fen)布(bu)。临界气(qi)(qi)体(ti)速(su)(su)度被称(cheng)为是水平输(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)跳跃速(su)(su)度，垂直输(shu)(shu)(shu)送(song)(song)(song)时堵塞。当水平管(guan)道(dao)(dao)中的(de)(de)(de)物料表(biao)面(mian)气(qi)(qi)体(ti)速(su)(su)度低于(yu)突变速(su)(su)度时，输(shu)(shu)(shu)送(song)(song)(song)将(jiang)会以(yi)低流(liu)(liu)(liu)量(liang)通(tong)(tong)过管(guan)道(dao)(dao)横(heng)截面(mian)的(de)(de)(de)上部，在管(guan)道(dao)(dao)的(de)(de)(de)剩余部分(fen)以(yi)高浓度低速(su)(su)度的(de)(de)(de)形式(shi)(shi)(shi)填充(chong)。有时沿管(guan)道(dao)(dao)的(de)(de)(de)横(heng)截面(mian)会被填满(man)，而有时只是部分(fen)被填满(man).

实际应(ying)用中(zhong), 按照气力(li)驱动(dong)形式可以分(fen)为(wei)负压(ya)(ya)和正压(ya)(ya)气力(li)输(shu)(shu)送(song)(song)(song), 在这两种输(shu)(shu)送(song)(song)(song)系(xi)统中(zhong), 根据流动(dong)状态(tai)图再区分(fen)分(fen)为(wei)稀相, 密(mi)相和流化态(tai)输(shu)(shu)送(song)(song)(song)系(xi)统. 除此之(zhi)外,根据喂(wei)料不同分(fen)为(wei)连续和批(pi)次(ci)输(shu)(shu)送(song)(song)(song). 在高(gao)压(ya)(ya)密(mi)相输(shu)(shu)送(song)(song)(song)技术中(zhong)常采用批(pi)次(ci)的压(ya)(ya)力(li)罐(guan)进行高(gao)压(ya)(ya)输(shu)(shu)送(song)(song)(song), 同时, 可以组(zu)合(he)两个压(ya)(ya)力(li)罐(guan)设(she)计(ji)达到(dao)连续的输(shu)(shu)送(song)(song)(song).

密(mi)相气(qi)力输送(song)特点:

● 用(yong)气量小, 节能

● 无残留输送

● 不(bu)堵塞, 运行可靠(kao)

● 维护费用低

● 适合于各类粉粒物(wu)料(liao)

● 压力至0. 6m p a可调

● 适合(he)于柔性化(hua)自(zi)动生产中的(de)物料(liao)高效输送