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)燒煤(mei)的(de)發電(dian)廠(chang)將煤(mei)磨成100微米以下的(de)煤(mei)粉,用預熱(re)空氣噴入爐膛(tang)經燃(ran)(ran)燒形成懸浮狀態,產生混雜有(you)大(da)量不燃(ran)(ran)物(wu)的(de)高(gao)溫(wen)煙(yan)氣,經集塵裝置(zhi)捕集就得到了粉煤(mei)灰。粉煤(mei)灰的(de)化學組成與粘(zhan)土質相(xiang)似,主要成分為二氧(yang)化硅、三氧(yang)化二鋁、三氧(yang)化二鐵、氧(yang)化鈣和未燃(ran)(ran)盡碳。
工作(zuo)原理(li)
濕(shi)粉煤(mei)灰由(you)供料(liao)(liao)裝置(zhi)進(jin)(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)滾筒(tong)(tong)的內層(ceng)(ceng)(ceng),實現順流烘(hong)(hong)干(gan)(gan), 粉煤(mei)灰在內層(ceng)(ceng)(ceng)的抄(chao)(chao)板下不斷抄(chao)(chao)起、散落呈螺旋行(xing)進(jin)(jin)(jin)(jin)式(shi)實現熱(re)交(jiao)換,物(wu)(wu)料(liao)(liao)移動至內層(ceng)(ceng)(ceng)的另一(yi)端進(jin)(jin)(jin)(jin)入(ru)中層(ceng)(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)逆(ni)流烘(hong)(hong)干(gan)(gan),物(wu)(wu)料(liao)(liao)在中層(ceng)(ceng)(ceng)不斷地被(bei)反(fan)復揚進(jin)(jin)(jin)(jin),呈進(jin)(jin)(jin)(jin)兩步(bu)(bu)退一(yi)步(bu)(bu)的行(xing)進(jin)(jin)(jin)(jin)方式(shi),物(wu)(wu)料(liao)(liao)在中層(ceng)(ceng)(ceng)既充(chong)分吸收內層(ceng)(ceng)(ceng)滾筒(tong)(tong)散發的熱(re)量(liang),又吸收中層(ceng)(ceng)(ceng)滾筒(tong)(tong)的熱(re)量(liang),同時又延(yan)長了(le)干(gan)(gan)燥(zao)時間(jian),物(wu)(wu)料(liao)(liao)在此達到(dao)干(gan)(gan)燥(zao)狀(zhuang)態。物(wu)(wu)料(liao)(liao)行(xing)至中層(ceng)(ceng)(ceng)另一(yi)端而落入(ru)外層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)(liao)在外層(ceng)(ceng)(ceng)滾筒(tong)(tong)內呈矩形(xing)多回路方式(shi)行(xing)進(jin)(jin)(jin)(jin),達到(dao)干(gan)(gan)燥(zao)效(xiao)果的物(wu)(wu)料(liao)(liao)在熱(re)風作用(yong)下快速行(xing)進(jin)(jin)(jin)(jin)排出滾筒(tong)(tong),沒有達到(dao)干(gan)(gan)燥(zao)效(xiao)果的濕(shi)物(wu)(wu)料(liao)(liao)因自重而不能快速行(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)料(liao)(liao)在此矩形(xing)抄(chao)(chao)板內進(jin)(jin)(jin)(jin)行(xing)充(chong)分干(gan)(gan)燥(zao),由(you)此達到(dao)干(gan)(gan)燥(zao)效(xiao)果,完成干(gan)(gan)燥(zao)過(guo)程(cheng)。
設備特(te)點(dian)
該設備與其他(ta)干燥設備相比,生產(chan)能力大(da),可(ke)(ke)連續(xu)操作; 結(jie)構簡單,操作方便(bian);故障少(shao),維修費用低;適用范圍廣(guang),流(liu)體阻力小(xiao),可(ke)(ke)以用它干燥顆料(liao)狀(zhuang)物料(liao),對于那些(xie)附著性(xing)大(da)的(de)物料(liao)也很(hen)有利;操作彈性(xing)大(da),生產(chan)上允許(xu)產(chan)品(pin)的(de)流(liu)量(liang)有較大(da)波動范圍,不會(hui)影(ying)響產(chan)品(pin)的(de)質量(liang);清掃容易。