煤(mei)粉(fen)灰烘干機是煤(mei)粉(fen)經(jing)高溫燃(ran)燒后形成(cheng)的一種似(si)火(huo)山灰質混合材料。
它是燃(ran)燒(shao)煤(mei)的(de)發電(dian)廠將煤(mei)磨成(cheng)100微米(mi)以下的(de)煤(mei)粉(fen),用預熱(re)空氣噴入爐膛(tang)經燃(ran)燒(shao)形成(cheng)懸浮狀(zhuang)態,產(chan)生混(hun)雜(za)有大量不燃(ran)物的(de)高溫煙氣,經集(ji)塵裝置捕集(ji)就得到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的(de)化學(xue)組成(cheng)與粘(zhan)土質相似,主要成(cheng)分(fen)為二氧化硅、三氧化二鋁、三氧化二鐵、氧化鈣和未燃(ran)盡碳。
工作(zuo)原理
濕粉煤灰由供料(liao)(liao)(liao)裝置(zhi)進入三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng),實(shi)現順流烘干(gan)(gan), 粉煤灰在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)抄(chao)板下不(bu)斷抄(chao)起、散落(luo)呈(cheng)螺(luo)旋行(xing)進式實(shi)現熱交換,物料(liao)(liao)(liao)移動至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)另(ling)一端進入中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進行(xing)逆流烘干(gan)(gan),物料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反(fan)復揚進,呈(cheng)進兩步退一步的(de)(de)行(xing)進方式,物料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既充分吸收(shou)內(nei)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)散發的(de)(de)熱量,又吸收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)熱量,同時又延長了干(gan)(gan)燥(zao)(zao)(zao)時間,物料(liao)(liao)(liao)在(zai)(zai)此達到(dao)干(gan)(gan)燥(zao)(zao)(zao)狀態。物料(liao)(liao)(liao)行(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另(ling)一端而(er)落(luo)入外(wai)層(ceng)(ceng)(ceng)(ceng),物料(liao)(liao)(liao)在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈(cheng)矩(ju)形(xing)多回路方式行(xing)進,達到(dao)干(gan)(gan)燥(zao)(zao)(zao)效果(guo)的(de)(de)物料(liao)(liao)(liao)在(zai)(zai)熱風(feng)作用下快速行(xing)進排出滾筒(tong),沒有達到(dao)干(gan)(gan)燥(zao)(zao)(zao)效果(guo)的(de)(de)濕物料(liao)(liao)(liao)因自重(zhong)而(er)不(bu)能(neng)快速行(xing)進,物料(liao)(liao)(liao)在(zai)(zai)此矩(ju)形(xing)抄(chao)板內(nei)進行(xing)充分干(gan)(gan)燥(zao)(zao)(zao),由此達到(dao)干(gan)(gan)燥(zao)(zao)(zao)效果(guo),完成干(gan)(gan)燥(zao)(zao)(zao)過程(cheng)。
設備特點(dian)
該設備與其(qi)他(ta)干(gan)燥設備相比,生產(chan)能(neng)力大(da)(da),可(ke)連續操(cao)作(zuo); 結構簡單(dan),操(cao)作(zuo)方便;故障少(shao),維修費用(yong)(yong)低;適用(yong)(yong)范圍廣(guang),流體阻力小,可(ke)以用(yong)(yong)它干(gan)燥顆料(liao)狀物(wu)料(liao),對于那些(xie)附著性大(da)(da)的物(wu)料(liao)也很(hen)有利(li);操(cao)作(zuo)彈性大(da)(da),生產(chan)上(shang)允許(xu)產(chan)品的流量(liang)有較大(da)(da)波動范圍,不會影響產(chan)品的質量(liang);清掃容易。