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(shao)(shao)煤(mei)(mei)的(de)發電廠(chang)將煤(mei)(mei)磨成100微米(mi)以下的(de)煤(mei)(mei)粉,用預熱(re)空氣(qi)噴入爐膛經燃(ran)(ran)燒(shao)(shao)形成懸浮(fu)狀態(tai),產(chan)生混雜有大量(liang)不燃(ran)(ran)物的(de)高溫(wen)煙氣(qi),經集塵裝置捕(bu)集就得到了(le)粉煤(mei)(mei)灰(hui)。粉煤(mei)(mei)灰(hui)的(de)化(hua)學組(zu)成與(yu)粘土質相似(si),主要成分為二氧化(hua)硅、三氧化(hua)二鋁(lv)、三氧化(hua)二鐵、氧化(hua)鈣(gai)和未燃(ran)(ran)盡(jin)碳。
工作(zuo)原理
濕粉煤灰(hui)由(you)供料(liao)(liao)(liao)(liao)(liao)裝(zhuang)置進(jin)(jin)(jin)入三層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的(de)(de)內(nei)(nei)層(ceng)(ceng),實(shi)現順(shun)流烘干(gan)(gan), 粉煤灰(hui)在內(nei)(nei)層(ceng)(ceng)的(de)(de)抄板下不(bu)斷抄起(qi)、散落(luo)呈(cheng)(cheng)螺(luo)旋(xuan)行(xing)(xing)進(jin)(jin)(jin)式(shi)實(shi)現熱(re)交(jiao)換,物(wu)料(liao)(liao)(liao)(liao)(liao)移(yi)動(dong)至內(nei)(nei)層(ceng)(ceng)的(de)(de)另一(yi)端進(jin)(jin)(jin)入中(zhong)層(ceng)(ceng),進(jin)(jin)(jin)行(xing)(xing)逆流烘干(gan)(gan),物(wu)料(liao)(liao)(liao)(liao)(liao)在中(zhong)層(ceng)(ceng)不(bu)斷地被反復(fu)揚(yang)進(jin)(jin)(jin),呈(cheng)(cheng)進(jin)(jin)(jin)兩(liang)步退(tui)一(yi)步的(de)(de)行(xing)(xing)進(jin)(jin)(jin)方式(shi),物(wu)料(liao)(liao)(liao)(liao)(liao)在中(zhong)層(ceng)(ceng)既充分吸收內(nei)(nei)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)散發的(de)(de)熱(re)量(liang),又吸收中(zhong)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的(de)(de)熱(re)量(liang),同時(shi)又延長了干(gan)(gan)燥(zao)時(shi)間,物(wu)料(liao)(liao)(liao)(liao)(liao)在此(ci)達到(dao)(dao)干(gan)(gan)燥(zao)狀態。物(wu)料(liao)(liao)(liao)(liao)(liao)行(xing)(xing)至中(zhong)層(ceng)(ceng)另一(yi)端而落(luo)入外(wai)層(ceng)(ceng),物(wu)料(liao)(liao)(liao)(liao)(liao)在外(wai)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)內(nei)(nei)呈(cheng)(cheng)矩形多回路方式(shi)行(xing)(xing)進(jin)(jin)(jin),達到(dao)(dao)干(gan)(gan)燥(zao)效果的(de)(de)物(wu)料(liao)(liao)(liao)(liao)(liao)在熱(re)風作用下快速(su)行(xing)(xing)進(jin)(jin)(jin)排(pai)出(chu)滾(gun)筒(tong)(tong)(tong),沒有(you)達到(dao)(dao)干(gan)(gan)燥(zao)效果的(de)(de)濕物(wu)料(liao)(liao)(liao)(liao)(liao)因自重而不(bu)能快速(su)行(xing)(xing)進(jin)(jin)(jin),物(wu)料(liao)(liao)(liao)(liao)(liao)在此(ci)矩形抄板內(nei)(nei)進(jin)(jin)(jin)行(xing)(xing)充分干(gan)(gan)燥(zao),由(you)此(ci)達到(dao)(dao)干(gan)(gan)燥(zao)效果,完成干(gan)(gan)燥(zao)過程。
設備特點
該(gai)設備與其(qi)他干燥(zao)設備相(xiang)比,生產(chan)(chan)能(neng)力大,可連續操(cao)作; 結構(gou)簡單,操(cao)作方(fang)便;故障少,維修費(fei)用(yong)(yong)低;適(shi)用(yong)(yong)范圍廣(guang),流體阻力小,可以用(yong)(yong)它干燥(zao)顆料(liao)狀物料(liao),對(dui)于那(nei)些附著(zhu)性(xing)大的物料(liao)也很有利;操(cao)作彈性(xing)大,生產(chan)(chan)上允(yun)許產(chan)(chan)品(pin)的流量有較(jiao)大波動范圍,不會影響產(chan)(chan)品(pin)的質量;清(qing)掃容(rong)易(yi)。