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(ta)是燃燒煤的(de)發電廠將煤磨成(cheng)100微(wei)米以下(xia)的(de)煤粉,用預熱空氣噴入爐膛(tang)經燃燒形成(cheng)懸浮(fu)狀態(tai),產生(sheng)混雜有大量不燃物(wu)的(de)高溫煙氣,經集(ji)塵裝置捕集(ji)就得到(dao)了粉煤灰。粉煤灰的(de)化(hua)學組成(cheng)與粘土質相似,主要(yao)成(cheng)分為(wei)二氧化(hua)硅、三氧化(hua)二鋁、三氧化(hua)二鐵、氧化(hua)鈣(gai)和未燃盡碳。
工(gong)作原理
濕(shi)(shi)粉(fen)煤灰由供料(liao)(liao)(liao)裝置進(jin)(jin)入(ru)三(san)層(ceng)(ceng)滾筒(tong)(tong)(tong)的內(nei)(nei)(nei)層(ceng)(ceng),實現順流(liu)烘干(gan)(gan)(gan), 粉(fen)煤灰在(zai)內(nei)(nei)(nei)層(ceng)(ceng)的抄(chao)板(ban)下(xia)(xia)不(bu)斷抄(chao)起、散(san)落(luo)呈螺旋(xuan)行(xing)進(jin)(jin)式實現熱(re)(re)交換,物(wu)(wu)料(liao)(liao)(liao)移動至內(nei)(nei)(nei)層(ceng)(ceng)的另(ling)一端(duan)進(jin)(jin)入(ru)中(zhong)層(ceng)(ceng),進(jin)(jin)行(xing)逆(ni)流(liu)烘干(gan)(gan)(gan),物(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)不(bu)斷地被反復揚進(jin)(jin),呈進(jin)(jin)兩步(bu)退(tui)一步(bu)的行(xing)進(jin)(jin)方(fang)式,物(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)既充分吸收內(nei)(nei)(nei)層(ceng)(ceng)滾筒(tong)(tong)(tong)散(san)發的熱(re)(re)量,又吸收中(zhong)層(ceng)(ceng)滾筒(tong)(tong)(tong)的熱(re)(re)量,同時又延(yan)長(chang)了干(gan)(gan)(gan)燥(zao)(zao)時間,物(wu)(wu)料(liao)(liao)(liao)在(zai)此達(da)(da)到干(gan)(gan)(gan)燥(zao)(zao)狀(zhuang)態。物(wu)(wu)料(liao)(liao)(liao)行(xing)至中(zhong)層(ceng)(ceng)另(ling)一端(duan)而落(luo)入(ru)外(wai)層(ceng)(ceng),物(wu)(wu)料(liao)(liao)(liao)在(zai)外(wai)層(ceng)(ceng)滾筒(tong)(tong)(tong)內(nei)(nei)(nei)呈矩形多(duo)回路方(fang)式行(xing)進(jin)(jin),達(da)(da)到干(gan)(gan)(gan)燥(zao)(zao)效(xiao)果的物(wu)(wu)料(liao)(liao)(liao)在(zai)熱(re)(re)風作用下(xia)(xia)快速行(xing)進(jin)(jin)排出滾筒(tong)(tong)(tong),沒有達(da)(da)到干(gan)(gan)(gan)燥(zao)(zao)效(xiao)果的濕(shi)(shi)物(wu)(wu)料(liao)(liao)(liao)因自重而不(bu)能(neng)快速行(xing)進(jin)(jin),物(wu)(wu)料(liao)(liao)(liao)在(zai)此矩形抄(chao)板(ban)內(nei)(nei)(nei)進(jin)(jin)行(xing)充分干(gan)(gan)(gan)燥(zao)(zao),由此達(da)(da)到干(gan)(gan)(gan)燥(zao)(zao)效(xiao)果,完成干(gan)(gan)(gan)燥(zao)(zao)過程(cheng)。
設備(bei)特(te)點(dian)
該設備與其他干(gan)(gan)燥設備相比(bi),生產(chan)(chan)能(neng)力大,可連續操(cao)作; 結(jie)構簡單,操(cao)作方(fang)便;故障少,維修費(fei)用低(di);適用范(fan)圍廣,流體阻力小,可以(yi)用它干(gan)(gan)燥顆料狀(zhuang)物料,對于那(nei)些附著(zhu)性大的物料也很(hen)有利(li);操(cao)作彈(dan)性大,生產(chan)(chan)上(shang)允許產(chan)(chan)品的流量有較大波動范(fan)圍,不會影響產(chan)(chan)品的質量;清(qing)掃容易。