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)煤的發(fa)電廠將煤磨(mo)成(cheng)100微米以下的煤粉(fen),用預(yu)熱(re)空(kong)氣噴入爐膛經(jing)燃(ran)(ran)燒(shao)形成(cheng)懸浮狀態(tai),產(chan)生(sheng)混(hun)雜有大量(liang)不燃(ran)(ran)物的高溫煙氣,經(jing)集塵裝置(zhi)捕(bu)集就得到了粉(fen)煤灰。粉(fen)煤灰的化(hua)(hua)學組成(cheng)與(yu)粘土質相似,主(zhu)要成(cheng)分為二(er)氧化(hua)(hua)硅(gui)、三(san)氧化(hua)(hua)二(er)鋁、三(san)氧化(hua)(hua)二(er)鐵、氧化(hua)(hua)鈣和(he)未燃(ran)(ran)盡(jin)碳。
工(gong)作原理
濕粉煤(mei)灰(hui)由(you)供(gong)料(liao)(liao)(liao)裝置(zhi)進(jin)(jin)(jin)(jin)入(ru)三(san)層(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)內(nei)(nei)層(ceng)(ceng)(ceng),實(shi)現(xian)(xian)順流(liu)烘(hong)干(gan)(gan)(gan)(gan), 粉煤(mei)灰(hui)在內(nei)(nei)層(ceng)(ceng)(ceng)的(de)抄(chao)板下不(bu)斷(duan)抄(chao)起、散落呈(cheng)螺旋行(xing)(xing)進(jin)(jin)(jin)(jin)式實(shi)現(xian)(xian)熱交換,物(wu)料(liao)(liao)(liao)移動(dong)至內(nei)(nei)層(ceng)(ceng)(ceng)的(de)另(ling)一(yi)端進(jin)(jin)(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)逆流(liu)烘(hong)干(gan)(gan)(gan)(gan),物(wu)料(liao)(liao)(liao)在中(zhong)層(ceng)(ceng)(ceng)不(bu)斷(duan)地被反復揚進(jin)(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)(jin)兩步退一(yi)步的(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方(fang)式,物(wu)料(liao)(liao)(liao)在中(zhong)層(ceng)(ceng)(ceng)既充分吸收內(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)筒(tong)散發的(de)熱量,又(you)吸收中(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)熱量,同時(shi)又(you)延(yan)長了干(gan)(gan)(gan)(gan)燥時(shi)間,物(wu)料(liao)(liao)(liao)在此達到干(gan)(gan)(gan)(gan)燥狀(zhuang)態。物(wu)料(liao)(liao)(liao)行(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)另(ling)一(yi)端而(er)落入(ru)外(wai)層(ceng)(ceng)(ceng),物(wu)料(liao)(liao)(liao)在外(wai)層(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)(nei)呈(cheng)矩(ju)形多(duo)回路方(fang)式行(xing)(xing)進(jin)(jin)(jin)(jin),達到干(gan)(gan)(gan)(gan)燥效果的(de)物(wu)料(liao)(liao)(liao)在熱風作用(yong)下快(kuai)速(su)行(xing)(xing)進(jin)(jin)(jin)(jin)排(pai)出滾(gun)筒(tong),沒(mei)有達到干(gan)(gan)(gan)(gan)燥效果的(de)濕物(wu)料(liao)(liao)(liao)因自重而(er)不(bu)能快(kuai)速(su)行(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)料(liao)(liao)(liao)在此矩(ju)形抄(chao)板內(nei)(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)充分干(gan)(gan)(gan)(gan)燥,由(you)此達到干(gan)(gan)(gan)(gan)燥效果,完成干(gan)(gan)(gan)(gan)燥過程(cheng)。
設備特點(dian)
該設(she)備與其他干燥設(she)備相比,生產能力(li)(li)大,可(ke)連(lian)續(xu)操(cao)作; 結構(gou)簡單,操(cao)作方便;故障少(shao),維修費用低;適(shi)用范圍(wei)廣,流體阻力(li)(li)小(xiao),可(ke)以用它干燥顆料(liao)狀物料(liao),對于那些附著(zhu)性大的物料(liao)也很有利;操(cao)作彈性大,生產上允許產品的流量(liang)有較大波動范圍(wei),不會影(ying)響(xiang)產品的質量(liang);清掃(sao)容(rong)易。