粉煤灰烘干機是煤粉經高溫燃燒后形成的一種似火山灰質混合材料。
它是燃(ran)(ran)(ran)(ran)燒(shao)煤的發電廠將煤磨(mo)成100微(wei)米以(yi)下的煤粉,用預熱(re)空氣(qi)噴入爐膛經燃(ran)(ran)(ran)(ran)燒(shao)形成懸浮狀態,產生混雜有(you)大量不燃(ran)(ran)(ran)(ran)物的高溫煙氣(qi),經集(ji)(ji)塵裝(zhuang)置捕(bu)集(ji)(ji)就(jiu)得到(dao)了粉煤灰(hui)。粉煤灰(hui)的化(hua)學組成與粘土質相似,主(zhu)要(yao)成分為(wei)二氧(yang)(yang)化(hua)硅、三氧(yang)(yang)化(hua)二鋁(lv)、三氧(yang)(yang)化(hua)二鐵、氧(yang)(yang)化(hua)鈣和未燃(ran)(ran)(ran)(ran)盡碳。
工作原理(li)
濕(shi)(shi)粉煤灰由供料(liao)(liao)裝置進(jin)(jin)(jin)入三(san)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng),實現順流(liu)(liu)烘干(gan), 粉煤灰在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的(de)抄(chao)板下不(bu)斷(duan)抄(chao)起、散落(luo)呈(cheng)螺(luo)旋(xuan)行(xing)(xing)進(jin)(jin)(jin)式(shi)實現熱交換,物(wu)(wu)(wu)料(liao)(liao)移(yi)動至內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的(de)另一端(duan)(duan)進(jin)(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)(jin)行(xing)(xing)逆流(liu)(liu)烘干(gan),物(wu)(wu)(wu)料(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)斷(duan)地被反復(fu)揚進(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)兩(liang)步退一步的(de)行(xing)(xing)進(jin)(jin)(jin)方式(shi),物(wu)(wu)(wu)料(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既充分吸(xi)收內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒散發的(de)熱量,又吸(xi)收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)熱量,同時(shi)(shi)又延長了干(gan)燥(zao)時(shi)(shi)間,物(wu)(wu)(wu)料(liao)(liao)在(zai)此達(da)(da)到(dao)干(gan)燥(zao)狀態。物(wu)(wu)(wu)料(liao)(liao)行(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另一端(duan)(duan)而落(luo)入外(wai)層(ceng)(ceng)(ceng)(ceng),物(wu)(wu)(wu)料(liao)(liao)在(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒內(nei)(nei)呈(cheng)矩形(xing)多回路方式(shi)行(xing)(xing)進(jin)(jin)(jin),達(da)(da)到(dao)干(gan)燥(zao)效果(guo)的(de)物(wu)(wu)(wu)料(liao)(liao)在(zai)熱風作用下快速(su)行(xing)(xing)進(jin)(jin)(jin)排出滾(gun)筒,沒(mei)有達(da)(da)到(dao)干(gan)燥(zao)效果(guo)的(de)濕(shi)(shi)物(wu)(wu)(wu)料(liao)(liao)因自重而不(bu)能快速(su)行(xing)(xing)進(jin)(jin)(jin),物(wu)(wu)(wu)料(liao)(liao)在(zai)此矩形(xing)抄(chao)板內(nei)(nei)進(jin)(jin)(jin)行(xing)(xing)充分干(gan)燥(zao),由此達(da)(da)到(dao)干(gan)燥(zao)效果(guo),完成干(gan)燥(zao)過程。
設備特點
該設(she)備(bei)與(yu)其他(ta)干燥(zao)設(she)備(bei)相比,生產能力大(da),可連續操作(zuo); 結構簡(jian)單,操作(zuo)方便;故障少(shao),維修(xiu)費用(yong)(yong)低;適用(yong)(yong)范圍廣(guang),流體(ti)阻力小,可以用(yong)(yong)它干燥(zao)顆(ke)料(liao)狀物料(liao),對(dui)于(yu)那些附著性大(da)的(de)物料(liao)也(ye)很有利;操作(zuo)彈性大(da),生產上允許產品的(de)流量有較大(da)波動范圍,不會影(ying)響產品的(de)質量;清掃(sao)容易。