煤粉灰(hui)烘干機(ji)是煤粉經高(gao)溫(wen)燃燒后形成(cheng)的一(yi)種似火山灰(hui)質混合材(cai)料。

它是燃(ran)(ran)燒煤(mei)的發電廠將(jiang)煤(mei)磨(mo)成(cheng)(cheng)(cheng)(cheng)100微米以下的煤(mei)粉(fen)(fen)，用預熱(re)空氣噴入爐膛經燃(ran)(ran)燒形成(cheng)(cheng)(cheng)(cheng)懸浮狀態，產生(sheng)混(hun)雜有大量不燃(ran)(ran)物的高溫煙氣，經集塵裝置捕集就得到了粉(fen)(fen)煤(mei)灰。粉(fen)(fen)煤(mei)灰的化學(xue)組成(cheng)(cheng)(cheng)(cheng)與粘土(tu)質相似(si)，主要成(cheng)(cheng)(cheng)(cheng)分為二氧(yang)(yang)化硅、三(san)氧(yang)(yang)化二鋁、三(san)氧(yang)(yang)化二鐵、氧(yang)(yang)化鈣和未(wei)燃(ran)(ran)盡碳。

工作原理

濕粉煤(mei)灰(hui)由供料(liao)(liao)裝置進(jin)(jin)(jin)入三(san)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng),實現(xian)順流烘(hong)干(gan), 粉煤(mei)灰(hui)在(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)抄板下(xia)不斷(duan)抄起、散(san)落(luo)呈螺旋行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)式實現(xian)熱(re)交(jiao)換，物料(liao)(liao)移(yi)動(dong)至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)另一(yi)端進(jin)(jin)(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)(jin)行(xing)(xing)(xing)(xing)逆流烘(hong)干(gan)，物料(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不斷(duan)地被反復揚進(jin)(jin)(jin)，呈進(jin)(jin)(jin)兩(liang)步(bu)退一(yi)步(bu)的(de)(de)(de)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)方式，物料(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)散(san)發的(de)(de)(de)熱(re)量(liang)，又(you)吸收中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)(de)熱(re)量(liang)，同時又(you)延長了干(gan)燥時間，物料(liao)(liao)在(zai)此達(da)到(dao)(dao)干(gan)燥狀態。物料(liao)(liao)行(xing)(xing)(xing)(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)端而落(luo)入外層(ceng)(ceng)(ceng)(ceng)(ceng)，物料(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈矩(ju)形(xing)多回路方式行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)，達(da)到(dao)(dao)干(gan)燥效(xiao)果的(de)(de)(de)物料(liao)(liao)在(zai)熱(re)風(feng)作用下(xia)快速行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)排出滾筒(tong)，沒有達(da)到(dao)(dao)干(gan)燥效(xiao)果的(de)(de)(de)濕物料(liao)(liao)因自(zi)重而不能快速行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)，物料(liao)(liao)在(zai)此矩(ju)形(xing)抄板內(nei)進(jin)(jin)(jin)行(xing)(xing)(xing)(xing)充分干(gan)燥，由此達(da)到(dao)(dao)干(gan)燥效(xiao)果，完(wan)成干(gan)燥過程(cheng)。

設備特點

該設備與其他(ta)干(gan)燥(zao)設備相比，生產(chan)能力(li)大(da)，可(ke)連續(xu)操作(zuo)(zuo)； 結構簡單(dan)，操作(zuo)(zuo)方便(bian)；故障少(shao)，維修(xiu)費(fei)用低；適用范圍廣，流體阻力(li)小，可(ke)以用它(ta)干(gan)燥(zao)顆(ke)料狀物料，對(dui)于那(nei)些附著性(xing)大(da)的(de)物料也很有利；操作(zuo)(zuo)彈性(xing)大(da)，生產(chan)上允許產(chan)品的(de)流量有較大(da)波(bo)動范圍，不會影響(xiang)產(chan)品的(de)質(zhi)量；清掃(sao)容易。