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)燒煤(mei)的(de)發電廠將煤(mei)磨成(cheng)100微(wei)米以(yi)下的(de)煤(mei)粉(fen)(fen),用預熱空氣(qi)噴(pen)入爐(lu)膛(tang)經(jing)燃(ran)燒形成(cheng)懸浮狀態,產生混(hun)雜有大量不(bu)燃(ran)物的(de)高溫煙氣(qi),經(jing)集塵裝置(zhi)捕集就得到了粉(fen)(fen)煤(mei)灰。粉(fen)(fen)煤(mei)灰的(de)化學(xue)組成(cheng)與粘土質(zhi)相似,主要成(cheng)分為(wei)二(er)氧(yang)化硅、三(san)氧(yang)化二(er)鋁、三(san)氧(yang)化二(er)鐵、氧(yang)化鈣和未燃(ran)盡(jin)碳。
工作原(yuan)理
濕粉(fen)煤灰由供料裝置進(jin)(jin)(jin)(jin)入三層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)內(nei)(nei)層(ceng)(ceng),實現順(shun)流烘干(gan), 粉(fen)煤灰在(zai)內(nei)(nei)層(ceng)(ceng)的(de)抄板下不(bu)斷(duan)抄起(qi)、散(san)落呈螺旋行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)式(shi)實現熱交(jiao)換,物(wu)(wu)料移動至內(nei)(nei)層(ceng)(ceng)的(de)另一(yi)端進(jin)(jin)(jin)(jin)入中(zhong)層(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)逆(ni)流烘干(gan),物(wu)(wu)料在(zai)中(zhong)層(ceng)(ceng)不(bu)斷(duan)地被反復揚進(jin)(jin)(jin)(jin),呈進(jin)(jin)(jin)(jin)兩步(bu)退一(yi)步(bu)的(de)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)方式(shi),物(wu)(wu)料在(zai)中(zhong)層(ceng)(ceng)既充(chong)分吸(xi)收(shou)內(nei)(nei)層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)散(san)發的(de)熱量,又吸(xi)收(shou)中(zhong)層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)熱量,同時又延長了干(gan)燥(zao)時間,物(wu)(wu)料在(zai)此達(da)到干(gan)燥(zao)狀(zhuang)態。物(wu)(wu)料行(xing)(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)另一(yi)端而(er)落入外(wai)層(ceng)(ceng),物(wu)(wu)料在(zai)外(wai)層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)內(nei)(nei)呈矩形多回路方式(shi)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin),達(da)到干(gan)燥(zao)效(xiao)果的(de)物(wu)(wu)料在(zai)熱風作用下快速(su)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)排出滾(gun)(gun)筒(tong)(tong),沒有(you)達(da)到干(gan)燥(zao)效(xiao)果的(de)濕物(wu)(wu)料因自重而(er)不(bu)能快速(su)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)料在(zai)此矩形抄板內(nei)(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)充(chong)分干(gan)燥(zao),由此達(da)到干(gan)燥(zao)效(xiao)果,完成干(gan)燥(zao)過(guo)程(cheng)。
設備特點(dian)
該設(she)(she)備(bei)與其他干(gan)燥設(she)(she)備(bei)相比,生產(chan)能力(li)(li)大,可連續操(cao)作; 結構簡(jian)單,操(cao)作方便;故障(zhang)少(shao),維修費(fei)用低;適(shi)用范(fan)圍廣,流體(ti)阻力(li)(li)小,可以用它干(gan)燥顆料(liao)狀物料(liao),對于那些附著性(xing)大的物料(liao)也很有利;操(cao)作彈性(xing)大,生產(chan)上允許產(chan)品的流量有較(jiao)大波(bo)動范(fan)圍,不會影(ying)響產(chan)品的質量;清掃容(rong)易。