煤粉灰烘干機是(shi)煤粉經高溫燃(ran)燒后形成的一種似火山灰質(zhi)混合材(cai)料。
它(ta)是燃(ran)燒(shao)煤的發電廠將煤磨(mo)成(cheng)100微米以下的煤粉,用預熱空(kong)氣(qi)噴入爐膛(tang)經(jing)燃(ran)燒(shao)形成(cheng)懸浮狀態,產生混(hun)雜有大量(liang)不(bu)燃(ran)物的高溫煙氣(qi),經(jing)集塵裝置(zhi)捕集就得到了粉煤灰。粉煤灰的化(hua)學組(zu)成(cheng)與粘土質相似,主(zhu)要成(cheng)分為二氧(yang)(yang)化(hua)硅(gui)、三(san)氧(yang)(yang)化(hua)二鋁、三(san)氧(yang)(yang)化(hua)二鐵、氧(yang)(yang)化(hua)鈣(gai)和未燃(ran)盡碳。
工作原(yuan)理(li)
濕粉煤灰由供料(liao)(liao)(liao)(liao)(liao)裝置進(jin)(jin)入(ru)三層(ceng)(ceng)滾筒(tong)的(de)內(nei)(nei)層(ceng)(ceng),實(shi)現順流烘干, 粉煤灰在(zai)(zai)(zai)內(nei)(nei)層(ceng)(ceng)的(de)抄板下不(bu)(bu)斷抄起(qi)、散落呈螺旋行(xing)進(jin)(jin)式實(shi)現熱(re)(re)交(jiao)換,物(wu)料(liao)(liao)(liao)(liao)(liao)移動(dong)至(zhi)內(nei)(nei)層(ceng)(ceng)的(de)另(ling)一端進(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng),進(jin)(jin)行(xing)逆流烘干,物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)不(bu)(bu)斷地(di)被反復揚進(jin)(jin),呈進(jin)(jin)兩(liang)步退(tui)一步的(de)行(xing)進(jin)(jin)方式,物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)既充(chong)(chong)分吸(xi)收內(nei)(nei)層(ceng)(ceng)滾筒(tong)散發的(de)熱(re)(re)量(liang)(liang),又吸(xi)收中(zhong)(zhong)層(ceng)(ceng)滾筒(tong)的(de)熱(re)(re)量(liang)(liang),同(tong)時(shi)又延長了干燥(zao)(zao)時(shi)間,物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)此達(da)(da)到(dao)干燥(zao)(zao)狀態。物(wu)料(liao)(liao)(liao)(liao)(liao)行(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)另(ling)一端而落入(ru)外層(ceng)(ceng),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)外層(ceng)(ceng)滾筒(tong)內(nei)(nei)呈矩(ju)形多回路方式行(xing)進(jin)(jin),達(da)(da)到(dao)干燥(zao)(zao)效果的(de)物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)熱(re)(re)風作用下快速(su)行(xing)進(jin)(jin)排(pai)出滾筒(tong),沒有達(da)(da)到(dao)干燥(zao)(zao)效果的(de)濕物(wu)料(liao)(liao)(liao)(liao)(liao)因自(zi)重(zhong)而不(bu)(bu)能(neng)快速(su)行(xing)進(jin)(jin),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)此矩(ju)形抄板內(nei)(nei)進(jin)(jin)行(xing)充(chong)(chong)分干燥(zao)(zao),由此達(da)(da)到(dao)干燥(zao)(zao)效果,完成干燥(zao)(zao)過程(cheng)。
設備特點
該設備與其他干燥設備相比,生產能力(li)大(da)(da),可(ke)連(lian)續(xu)操作; 結(jie)構簡單,操作方便(bian);故障少(shao),維(wei)修費用低;適用范圍(wei)廣,流體阻力(li)小,可(ke)以用它干燥顆料狀物料,對(dui)于(yu)那(nei)些(xie)附著性(xing)大(da)(da)的物料也很有(you)利;操作彈性(xing)大(da)(da),生產上允許(xu)產品的流量有(you)較大(da)(da)波動范圍(wei),不會影(ying)響(xiang)產品的質量;清掃容易。