煤粉(fen)(fen)灰烘干機是(shi)煤粉(fen)(fen)經高(gao)溫燃燒后形成的一種似(si)火山灰質(zhi)混合材料。
它是(shi)燃(ran)燒煤(mei)的發(fa)電廠將煤(mei)磨成100微(wei)米以下(xia)的煤(mei)粉(fen),用預熱空氣噴(pen)入爐膛經燃(ran)燒形成懸浮狀態(tai),產生(sheng)混雜有(you)大量不(bu)燃(ran)物的高溫煙氣,經集塵裝(zhuang)置捕集就得到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的化(hua)學組(zu)成與粘土(tu)質相似,主(zhu)要(yao)成分為二(er)氧化(hua)硅、三氧化(hua)二(er)鋁(lv)、三氧化(hua)二(er)鐵、氧化(hua)鈣(gai)和未燃(ran)盡(jin)碳。
工(gong)作原理
濕粉煤灰由供料(liao)(liao)(liao)(liao)裝置進(jin)入三層(ceng)(ceng)(ceng)滾筒的(de)(de)(de)(de)內(nei)層(ceng)(ceng)(ceng),實現順(shun)流(liu)烘干(gan), 粉煤灰在(zai)內(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)(de)抄(chao)板(ban)下不斷(duan)抄(chao)起、散落呈(cheng)螺旋行(xing)(xing)(xing)(xing)進(jin)式實現熱交換(huan),物(wu)(wu)料(liao)(liao)(liao)(liao)移(yi)動至內(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)(de)另(ling)(ling)一端進(jin)入中(zhong)層(ceng)(ceng)(ceng),進(jin)行(xing)(xing)(xing)(xing)逆(ni)流(liu)烘干(gan),物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)不斷(duan)地被反復揚進(jin),呈(cheng)進(jin)兩步退一步的(de)(de)(de)(de)行(xing)(xing)(xing)(xing)進(jin)方式,物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)既充(chong)分(fen)吸收(shou)內(nei)層(ceng)(ceng)(ceng)滾筒散發的(de)(de)(de)(de)熱量,又吸收(shou)中(zhong)層(ceng)(ceng)(ceng)滾筒的(de)(de)(de)(de)熱量,同時又延長(chang)了干(gan)燥(zao)時間(jian),物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)此達(da)(da)到(dao)(dao)干(gan)燥(zao)狀態。物(wu)(wu)料(liao)(liao)(liao)(liao)行(xing)(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)另(ling)(ling)一端而落入外層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾筒內(nei)呈(cheng)矩(ju)形(xing)多(duo)回路方式行(xing)(xing)(xing)(xing)進(jin),達(da)(da)到(dao)(dao)干(gan)燥(zao)效(xiao)果的(de)(de)(de)(de)物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)熱風作用下快速行(xing)(xing)(xing)(xing)進(jin)排出(chu)滾筒,沒有達(da)(da)到(dao)(dao)干(gan)燥(zao)效(xiao)果的(de)(de)(de)(de)濕物(wu)(wu)料(liao)(liao)(liao)(liao)因自(zi)重而不能(neng)快速行(xing)(xing)(xing)(xing)進(jin),物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)此矩(ju)形(xing)抄(chao)板(ban)內(nei)進(jin)行(xing)(xing)(xing)(xing)充(chong)分(fen)干(gan)燥(zao),由此達(da)(da)到(dao)(dao)干(gan)燥(zao)效(xiao)果,完成干(gan)燥(zao)過程。
設(she)備特(te)點(dian)
該設(she)備(bei)與其他干(gan)燥設(she)備(bei)相比,生產能力大,可連續操作; 結(jie)構簡單,操作方便;故障少,維修費(fei)用(yong)低;適用(yong)范圍廣,流體(ti)阻力小,可以用(yong)它(ta)干(gan)燥顆料(liao)狀物(wu)料(liao),對于那些附著性大的物(wu)料(liao)也很有利(li);操作彈性大,生產上允許產品的流量有較(jiao)大波動范圍,不會影(ying)響產品的質量;清掃容易(yi)。