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(mei)(mei)的(de)發電(dian)廠將煤(mei)(mei)磨(mo)成(cheng)100微米(mi)以(yi)下的(de)煤(mei)(mei)粉(fen),用(yong)預熱空氣噴入爐膛經(jing)燃(ran)(ran)燒(shao)形成(cheng)懸浮狀態(tai),產(chan)生混雜(za)有大(da)量不燃(ran)(ran)物的(de)高溫煙氣,經(jing)集塵裝(zhuang)置捕集就得到了粉(fen)煤(mei)(mei)灰(hui)。粉(fen)煤(mei)(mei)灰(hui)的(de)化(hua)學組成(cheng)與粘土質(zhi)相似,主要成(cheng)分為二氧化(hua)硅、三(san)氧化(hua)二鋁、三(san)氧化(hua)二鐵、氧化(hua)鈣和未(wei)燃(ran)(ran)盡碳(tan)。
工作原理
濕粉(fen)煤灰由(you)供(gong)料(liao)(liao)(liao)裝(zhuang)置進(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)的內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),實現順流(liu)烘干(gan)(gan)(gan), 粉(fen)煤灰在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的抄板下(xia)不(bu)斷(duan)抄起、散落呈螺旋行(xing)(xing)(xing)進(jin)(jin)(jin)式(shi)實現熱交換(huan),物(wu)料(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的另一端進(jin)(jin)(jin)入(ru)中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)(jin)(jin)行(xing)(xing)(xing)逆流(liu)烘干(gan)(gan)(gan),物(wu)料(liao)(liao)(liao)在(zai)(zai)中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷(duan)地被反復(fu)揚進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩步退(tui)一步的行(xing)(xing)(xing)進(jin)(jin)(jin)方式(shi),物(wu)料(liao)(liao)(liao)在(zai)(zai)中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)既充(chong)分吸收(shou)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)散發的熱量(liang),又(you)吸收(shou)中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)的熱量(liang),同時又(you)延長(chang)了干(gan)(gan)(gan)燥時間(jian),物(wu)料(liao)(liao)(liao)在(zai)(zai)此(ci)達(da)(da)到(dao)干(gan)(gan)(gan)燥狀態。物(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)至中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)另一端而(er)落入(ru)外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)料(liao)(liao)(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)內(nei)呈矩形多回路方式(shi)行(xing)(xing)(xing)進(jin)(jin)(jin),達(da)(da)到(dao)干(gan)(gan)(gan)燥效(xiao)果(guo)的物(wu)料(liao)(liao)(liao)在(zai)(zai)熱風作用下(xia)快(kuai)速行(xing)(xing)(xing)進(jin)(jin)(jin)排出滾(gun)(gun)筒(tong),沒有達(da)(da)到(dao)干(gan)(gan)(gan)燥效(xiao)果(guo)的濕物(wu)料(liao)(liao)(liao)因自重而(er)不(bu)能快(kuai)速行(xing)(xing)(xing)進(jin)(jin)(jin),物(wu)料(liao)(liao)(liao)在(zai)(zai)此(ci)矩形抄板內(nei)進(jin)(jin)(jin)行(xing)(xing)(xing)充(chong)分干(gan)(gan)(gan)燥,由(you)此(ci)達(da)(da)到(dao)干(gan)(gan)(gan)燥效(xiao)果(guo),完成干(gan)(gan)(gan)燥過程(cheng)。
設備特點(dian)
該設備(bei)與其他干燥(zao)設備(bei)相比,生產能力大,可連續操(cao)作; 結構(gou)簡單,操(cao)作方(fang)便;故障少,維(wei)修費用低;適用范(fan)圍(wei)廣,流(liu)體阻力小,可以用它干燥(zao)顆料狀物料,對于那些附著性(xing)大的物料也很(hen)有利;操(cao)作彈性(xing)大,生產上(shang)允許產品(pin)的流(liu)量有較大波(bo)動范(fan)圍(wei),不會影響產品(pin)的質量;清掃容易。