煤炭廠專用螺旋氣力輸送泵-空氣斜槽粉體輸灰泵
粉體氣力輸送機灰(hui)(hui)氣(qi)(qi)(qi)比是選擇(ze)輸(shu)送壓縮機容量的(de)(de)重要(yao)(yao)(yao)依據(ju)，也是氣(qi)(qi)(qi)力(li)(li)輸(shu)送系(xi)統的(de)(de)考核指標之一(yi)。影(ying)響輸(shu)送灰(hui)(hui)氣(qi)(qi)(qi)比的(de)(de)因素很多，理論上很難給(gei)出一(yi)套完整的(de)(de)計算公式。而且各(ge)種類(lei)型的(de)(de)氣(qi)(qi)(qi)力(li)(li)輸(shu)送系(xi)統都(dou)有各(ge)自(zi)的(de)(de)特點，需要(yao)(yao)(yao)根據(ju)工程的(de)(de)具體情況通過計算確(que)定。灰(hui)(hui)氣(qi)(qi)(qi)比的(de)(de)正確(que)計算和正確(que)使用(yong)對于氣(qi)(qi)(qi)力(li)(li)輸(shu)送系(xi)統的(de)(de)安*可靠運行至(zhi)關重要(yao)(yao)(yao)。大宇整理了間歇式與連續式氣(qi)(qi)(qi)力(li)(li)輸(shu)送的(de)(de)灰(hui)(hui)氣(qi)(qi)(qi)配比如下：
1、間歇氣力(li)輸(shu)送(song)(song)(song)(song)的(de)(de)(de)灰氣比：由于間歇氣力(li)輸(shu)送(song)(song)(song)(song)系統在輸(shu)送(song)(song)(song)(song)過程中(zhong)受到泵開(kai)啟壓力(li)和泵關閉(bi)壓力(li)的(de)(de)(de)限制(zhi)，倉(cang)泵內的(de)(de)(de)干灰必(bi)須先輸(shu)送(song)(song)(song)(song)至灰倉(cang)，然后再輸(shu)送(song)(song)(song)(song)至灰倉(cang)。第二批倉(cang)泵可輸(shu)送(song)(song)(song)(song)的(de)(de)(de)內部有干灰，因(yin)此(ci)影響輸(shu)送(song)(song)(song)(song)塵氣比的(de)(de)(de)主要因(yin)素是(shi)輸(shu)送(song)(song)(song)(song)距離。在實際輸(shu)送(song)(song)(song)(song)過程中(zhong)，每個輸(shu)送(song)(song)(song)(song)階段(duan)都有一個輸(shu)送(song)(song)(song)(song)灰氣比例(li)，需要通過計算確定。
倉泵輸出(chu)(chu)灰氣比(bi)(bi)主要(yao)(yao)用(yong)于計(ji)算(suan)倉泵干灰輸出(chu)(chu)時間和確定倉泵輸出(chu)(chu)管徑；輸送(song)過程灰氣比(bi)(bi)主要(yao)(yao)用(yong)于計(ji)算(suan)輸送(song)管道(dao)的(de)技術參數；系統綜(zong)合灰氣比(bi)(bi)是選擇(ze)運輸壓縮機容量和考(kao)核系統指(zhi)標的(de)重要(yao)(yao)依據。
2、連續(xu)氣(qi)力輸送系統灰氣(qi)比：
由于料倉泵(beng)可以(yi)(yi)將流態化干灰(hui)依次輸(shu)(shu)送(song)(song)到輸(shu)(shu)送(song)(song)管道(dao)中，即連(lian)(lian)續輸(shu)(shu)送(song)(song)，所以(yi)(yi)影響輸(shu)(shu)送(song)(song)灰(hui)氣(qi)比的主要因(yin)素不是輸(shu)(shu)送(song)(song)距離，而是氣(qi)灰(hui)的流量。輸(shu)(shu)送(song)(song)管道(dao)中的混合物。與(yu)壓力(li)損失有關。例(li)如，連(lian)(lian)續輸(shu)(shu)送(song)(song)系統采用0.8m3鎖風(feng)閥，輸(shu)(shu)送(song)(song)距離為1500m，則在實際輸(shu)(shu)送(song)(song)過程中，各階段輸(shu)(shu)送(song)(song)灰(hui)氣(qi)配(pei)比考慮如下(xia)：
1）、利(li)用倉(cang)泵(beng)與(yu)輸(shu)(shu)(shu)送管道之間(jian)的(de)壓力差和流(liu)化(hua)灰(hui)的(de)自(zi)重(zhong)，將流(liu)化(hua)灰(hui)輸(shu)(shu)(shu)送到輸(shu)(shu)(shu)送機內(nei)。由于壓縮空氣的(de)輸(shu)(shu)(shu)送不經過倉(cang)泵(beng)，因此(ci)倉(cang)泵(beng)的(de)輸(shu)(shu)(shu)出主要(yao)是(shi)干(gan)灰(hui)，消耗的(de)壓縮空氣很少。因此(ci)，無需(xu)計算該輸(shu)(shu)(shu)送階段的(de)輸(shu)(shu)(shu)送灰(hui)氣比。
2）、當輸入(ru)的流(liu)化灰(hui)與從輸送(song)(song)管道(dao)始端輸入(ru)的壓縮(suo)空氣(qi)混(hun)合后輸送(song)(song)時(shi)，形(xing)成輸送(song)(song)過程(cheng)中(zhong)的灰(hui)氣(qi)比。此時(shi)輸送(song)(song)灰(hui)氣(qi)比為(wei)26.5kg(灰(hui))/kg(氣(qi))。輸送(song)(song)過程(cheng)中(zhong)的輸送(song)(song)灰(hui)氣(qi)比是(shi)計算輸送(song)(song)管道(dao)技(ji)術參數的重(zhong)(zhong)要(yao)依(yi)據(ju)。由于電除塵器在輸送(song)(song)過程(cheng)中(zhong)電場會發(fa)生切換，且系統(tong)啟(qi)動前(qian)和系統(tong)停止前(qian)（輔助輸送(song)(song)時(shi)間）需對輸送(song)(song)管道(dao)進(jin)行吹掃，因此系統(tong)的綜合灰(hui)氣(qi)比是(shi)選擇運輸壓縮(suo)機容量的關鍵(jian)。和系統(tong)考(kao)核指標的重(zhong)(zhong)要(yao)依(yi)據(ju)。
