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(shi)燃(ran)(ran)燒(shao)煤的(de)(de)(de)發電廠(chang)將煤磨(mo)成100微米以下的(de)(de)(de)煤粉(fen),用預熱空氣(qi)噴入(ru)爐(lu)膛經(jing)燃(ran)(ran)燒(shao)形(xing)成懸浮狀(zhuang)態,產生混雜有大量(liang)不(bu)燃(ran)(ran)物的(de)(de)(de)高(gao)溫煙(yan)氣(qi),經(jing)集塵裝置捕集就得到了(le)粉(fen)煤灰。粉(fen)煤灰的(de)(de)(de)化學組(zu)成與粘土質相(xiang)似,主要(yao)成分為二(er)(er)氧(yang)化硅(gui)、三(san)(san)氧(yang)化二(er)(er)鋁(lv)、三(san)(san)氧(yang)化二(er)(er)鐵、氧(yang)化鈣(gai)和未(wei)燃(ran)(ran)盡碳。
工作原理
濕粉(fen)煤灰(hui)由(you)供料(liao)(liao)(liao)(liao)(liao)裝(zhuang)置進(jin)(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),實現順流烘干, 粉(fen)煤灰(hui)在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的抄板下(xia)不(bu)斷抄起(qi)、散落呈(cheng)螺(luo)旋行進(jin)(jin)(jin)式實現熱交換,物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)移(yi)動至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的另一(yi)端進(jin)(jin)(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)(jin)(jin)行逆流烘干,物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反(fan)復揚進(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)兩步退一(yi)步的行進(jin)(jin)(jin)方(fang)式,物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)既充分吸(xi)收內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散發(fa)的熱量(liang),又吸(xi)收中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的熱量(liang),同時又延長(chang)了干燥(zao)時間(jian),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)達到干燥(zao)狀態。物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)行至(zhi)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)端而落入外(wai)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)呈(cheng)矩形多回路方(fang)式行進(jin)(jin)(jin),達到干燥(zao)效果的物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)熱風作用下(xia)快速行進(jin)(jin)(jin)排出滾(gun)筒(tong),沒有達到干燥(zao)效果的濕物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)因自重而不(bu)能(neng)快速行進(jin)(jin)(jin),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)矩形抄板內(nei)進(jin)(jin)(jin)行充分干燥(zao),由(you)此(ci)達到干燥(zao)效果,完成干燥(zao)過(guo)程。
設備特點(dian)
該(gai)設(she)(she)備與其他干燥設(she)(she)備相比,生(sheng)產能力(li)大,可連續操作; 結(jie)構簡單,操作方便;故(gu)障(zhang)少,維修費用低;適(shi)用范(fan)圍(wei)廣,流體阻(zu)力(li)小,可以用它干燥顆(ke)料狀物(wu)料,對于那些附著(zhu)性(xing)大的物(wu)料也很(hen)有(you)利(li);操作彈性(xing)大,生(sheng)產上允許產品(pin)的流量有(you)較大波動范(fan)圍(wei),不(bu)會影響產品(pin)的質(zhi)量;清掃(sao)容(rong)易。