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)燒(shao)煤(mei)的發(fa)電廠將煤(mei)磨成(cheng)100微米(mi)以下的煤(mei)粉(fen),用預熱空氣噴入爐膛經燃(ran)燒(shao)形成(cheng)懸浮狀態(tai),產生混雜有大量不燃(ran)物的高溫煙氣,經集塵裝置捕集就得(de)到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的化學組成(cheng)與粘土質相似,主(zhu)要成(cheng)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)盡碳。
工作(zuo)原理(li)
濕粉煤灰由(you)供料裝置進(jin)(jin)(jin)(jin)(jin)入三層(ceng)滾(gun)筒(tong)的(de)(de)內層(ceng),實(shi)現順(shun)流(liu)烘(hong)干, 粉煤灰在內層(ceng)的(de)(de)抄板(ban)下不(bu)斷抄起、散(san)落呈(cheng)(cheng)螺旋行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)式(shi)實(shi)現熱(re)交換(huan),物(wu)(wu)(wu)(wu)料移動至(zhi)內層(ceng)的(de)(de)另(ling)(ling)一端(duan)進(jin)(jin)(jin)(jin)(jin)入中層(ceng),進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)逆流(liu)烘(hong)干,物(wu)(wu)(wu)(wu)料在中層(ceng)不(bu)斷地(di)被反復揚進(jin)(jin)(jin)(jin)(jin),呈(cheng)(cheng)進(jin)(jin)(jin)(jin)(jin)兩步退一步的(de)(de)行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)方式(shi),物(wu)(wu)(wu)(wu)料在中層(ceng)既充(chong)分(fen)吸收(shou)內層(ceng)滾(gun)筒(tong)散(san)發的(de)(de)熱(re)量,又吸收(shou)中層(ceng)滾(gun)筒(tong)的(de)(de)熱(re)量,同時(shi)又延長了干燥(zao)時(shi)間,物(wu)(wu)(wu)(wu)料在此(ci)(ci)達(da)到干燥(zao)狀態。物(wu)(wu)(wu)(wu)料行(xing)(xing)至(zhi)中層(ceng)另(ling)(ling)一端(duan)而落入外(wai)(wai)層(ceng),物(wu)(wu)(wu)(wu)料在外(wai)(wai)層(ceng)滾(gun)筒(tong)內呈(cheng)(cheng)矩(ju)形多回(hui)路(lu)方式(shi)行(xing)(xing)進(jin)(jin)(jin)(jin)(jin),達(da)到干燥(zao)效(xiao)(xiao)果(guo)的(de)(de)物(wu)(wu)(wu)(wu)料在熱(re)風作用下快速行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)排(pai)出滾(gun)筒(tong),沒有達(da)到干燥(zao)效(xiao)(xiao)果(guo)的(de)(de)濕物(wu)(wu)(wu)(wu)料因自重而不(bu)能(neng)快速行(xing)(xing)進(jin)(jin)(jin)(jin)(jin),物(wu)(wu)(wu)(wu)料在此(ci)(ci)矩(ju)形抄板(ban)內進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)充(chong)分(fen)干燥(zao),由(you)此(ci)(ci)達(da)到干燥(zao)效(xiao)(xiao)果(guo),完(wan)成干燥(zao)過程。
設備特點
該設備與其他干燥設備相比,生(sheng)產能力大(da)(da),可連(lian)續(xu)操(cao)作(zuo); 結構(gou)簡(jian)單,操(cao)作(zuo)方(fang)便(bian);故(gu)障(zhang)少,維修費用(yong)低;適用(yong)范(fan)圍(wei)廣(guang),流體(ti)阻力小,可以用(yong)它干燥顆料狀(zhuang)物料,對于那些(xie)附著性大(da)(da)的(de)物料也很有利;操(cao)作(zuo)彈(dan)性大(da)(da),生(sheng)產上(shang)允許產品(pin)的(de)流量(liang)有較大(da)(da)波動范(fan)圍(wei),不會影響產品(pin)的(de)質量(liang);清掃容易。