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。
它是燃燒煤的(de)發電(dian)廠將煤磨成(cheng)100微米以下的(de)煤粉(fen)(fen),用(yong)預熱空(kong)氣(qi)噴(pen)入爐膛經(jing)燃燒形成(cheng)懸浮(fu)狀(zhuang)態,產生混雜有(you)大量不燃物的(de)高溫煙氣(qi),經(jing)集(ji)塵裝置捕集(ji)就得到了粉(fen)(fen)煤灰。粉(fen)(fen)煤灰的(de)化學組成(cheng)與粘土質(zhi)相似,主要成(cheng)分為二(er)氧化硅、三氧化二(er)鋁、三氧化二(er)鐵、氧化鈣和(he)未燃盡碳。
工作(zuo)原理
濕粉煤(mei)灰由(you)供(gong)料(liao)(liao)裝置進(jin)(jin)入(ru)三(san)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)的(de)(de)內(nei)層(ceng)(ceng),實現(xian)(xian)順流烘干(gan), 粉煤(mei)灰在(zai)內(nei)層(ceng)(ceng)的(de)(de)抄板下不(bu)(bu)斷抄起、散落呈螺旋行(xing)進(jin)(jin)式(shi)實現(xian)(xian)熱(re)交換,物(wu)(wu)料(liao)(liao)移動至內(nei)層(ceng)(ceng)的(de)(de)另(ling)一(yi)(yi)端進(jin)(jin)入(ru)中(zhong)層(ceng)(ceng),進(jin)(jin)行(xing)逆流烘干(gan),物(wu)(wu)料(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)不(bu)(bu)斷地被反復揚進(jin)(jin),呈進(jin)(jin)兩步(bu)退一(yi)(yi)步(bu)的(de)(de)行(xing)進(jin)(jin)方(fang)式(shi),物(wu)(wu)料(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)既充(chong)分吸(xi)收(shou)內(nei)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)散發的(de)(de)熱(re)量,又(you)吸(xi)收(shou)中(zhong)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)的(de)(de)熱(re)量,同時(shi)又(you)延長了(le)干(gan)燥(zao)(zao)時(shi)間,物(wu)(wu)料(liao)(liao)在(zai)此達(da)(da)到干(gan)燥(zao)(zao)狀態。物(wu)(wu)料(liao)(liao)行(xing)至中(zhong)層(ceng)(ceng)另(ling)一(yi)(yi)端而落入(ru)外層(ceng)(ceng),物(wu)(wu)料(liao)(liao)在(zai)外層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)內(nei)呈矩(ju)形多回路方(fang)式(shi)行(xing)進(jin)(jin),達(da)(da)到干(gan)燥(zao)(zao)效果的(de)(de)物(wu)(wu)料(liao)(liao)在(zai)熱(re)風作用下快速行(xing)進(jin)(jin)排出(chu)滾(gun)筒(tong)(tong)(tong)(tong),沒有達(da)(da)到干(gan)燥(zao)(zao)效果的(de)(de)濕物(wu)(wu)料(liao)(liao)因(yin)自重而不(bu)(bu)能快速行(xing)進(jin)(jin),物(wu)(wu)料(liao)(liao)在(zai)此矩(ju)形抄板內(nei)進(jin)(jin)行(xing)充(chong)分干(gan)燥(zao)(zao),由(you)此達(da)(da)到干(gan)燥(zao)(zao)效果,完成干(gan)燥(zao)(zao)過程。
設備特點
該設備與其他干(gan)燥設備相(xiang)比,生(sheng)產(chan)能力(li)大(da),可連續操(cao)作(zuo); 結構簡單,操(cao)作(zuo)方便;故障少,維修費(fei)用(yong)低;適用(yong)范(fan)圍(wei)廣,流(liu)體(ti)阻力(li)小(xiao),可以用(yong)它(ta)干(gan)燥顆料(liao)(liao)狀物料(liao)(liao),對于(yu)那些附著(zhu)性大(da)的(de)物料(liao)(liao)也(ye)很有利;操(cao)作(zuo)彈性大(da),生(sheng)產(chan)上(shang)允許產(chan)品(pin)(pin)的(de)流(liu)量有較(jiao)大(da)波(bo)動(dong)范(fan)圍(wei),不會影(ying)響產(chan)品(pin)(pin)的(de)質量;清掃(sao)容易。