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)(ran)燒(shao)煤的(de)發電廠將煤磨(mo)成(cheng)100微米(mi)以下的(de)煤粉(fen)，用預熱空氣(qi)噴(pen)入爐膛經燃(ran)(ran)燒(shao)形成(cheng)懸(xuan)浮狀態，產生(sheng)混雜有大量不(bu)燃(ran)(ran)物的(de)高溫煙氣(qi)，經集塵裝置捕集就得到了粉(fen)煤灰。粉(fen)煤灰的(de)化學組成(cheng)與粘土(tu)質相(xiang)似，主要(yao)成(cheng)分為二氧(yang)化硅、三(san)氧(yang)化二鋁、三(san)氧(yang)化二鐵、氧(yang)化鈣(gai)和未燃(ran)(ran)盡碳(tan)。

工作(zuo)原理

濕粉煤(mei)灰由供料(liao)裝置進(jin)(jin)(jin)(jin)入三層(ceng)(ceng)滾筒(tong)(tong)的(de)內層(ceng)(ceng),實(shi)現(xian)順流烘(hong)(hong)干(gan), 粉煤(mei)灰在內層(ceng)(ceng)的(de)抄板(ban)下(xia)不斷抄起、散(san)落(luo)呈螺旋行(xing)(xing)進(jin)(jin)(jin)(jin)式實(shi)現(xian)熱交(jiao)換(huan)，物(wu)(wu)料(liao)移(yi)動至內層(ceng)(ceng)的(de)另一(yi)端進(jin)(jin)(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng)，進(jin)(jin)(jin)(jin)行(xing)(xing)逆流烘(hong)(hong)干(gan)，物(wu)(wu)料(liao)在中(zhong)(zhong)層(ceng)(ceng)不斷地被反復揚進(jin)(jin)(jin)(jin)，呈進(jin)(jin)(jin)(jin)兩步退一(yi)步的(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方式，物(wu)(wu)料(liao)在中(zhong)(zhong)層(ceng)(ceng)既充(chong)分吸(xi)收(shou)內層(ceng)(ceng)滾筒(tong)(tong)散(san)發的(de)熱量，又(you)吸(xi)收(shou)中(zhong)(zhong)層(ceng)(ceng)滾筒(tong)(tong)的(de)熱量，同(tong)時(shi)又(you)延(yan)長了(le)干(gan)燥(zao)(zao)時(shi)間，物(wu)(wu)料(liao)在此達到干(gan)燥(zao)(zao)狀(zhuang)態(tai)。物(wu)(wu)料(liao)行(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)另一(yi)端而(er)落(luo)入外(wai)層(ceng)(ceng)，物(wu)(wu)料(liao)在外(wai)層(ceng)(ceng)滾筒(tong)(tong)內呈矩(ju)形(xing)多(duo)回路方式行(xing)(xing)進(jin)(jin)(jin)(jin)，達到干(gan)燥(zao)(zao)效(xiao)果的(de)物(wu)(wu)料(liao)在熱風作用下(xia)快(kuai)速行(xing)(xing)進(jin)(jin)(jin)(jin)排出滾筒(tong)(tong)，沒有達到干(gan)燥(zao)(zao)效(xiao)果的(de)濕物(wu)(wu)料(liao)因自重而(er)不能(neng)快(kuai)速行(xing)(xing)進(jin)(jin)(jin)(jin)，物(wu)(wu)料(liao)在此矩(ju)形(xing)抄板(ban)內進(jin)(jin)(jin)(jin)行(xing)(xing)充(chong)分干(gan)燥(zao)(zao)，由此達到干(gan)燥(zao)(zao)效(xiao)果，完(wan)成(cheng)干(gan)燥(zao)(zao)過(guo)程(cheng)。

設(she)備特點

該設備與其他干(gan)燥設備相(xiang)比，生產能力(li)(li)大(da)，可連續操(cao)作(zuo)； 結構簡(jian)單，操(cao)作(zuo)方便；故障少(shao)，維修費用(yong)(yong)低；適用(yong)(yong)范(fan)圍(wei)(wei)廣，流體阻(zu)力(li)(li)小(xiao)，可以用(yong)(yong)它(ta)干(gan)燥顆料(liao)狀(zhuang)物料(liao)，對于那些附著性(xing)大(da)的(de)(de)物料(liao)也(ye)很(hen)有利；操(cao)作(zuo)彈性(xing)大(da)，生產上允許產品的(de)(de)流量(liang)有較大(da)波動范(fan)圍(wei)(wei)，不會影(ying)響產品的(de)(de)質(zhi)量(liang)；清掃(sao)容易。