煤(mei)粉(fen)灰烘干機是煤(mei)粉(fen)經高(gao)溫燃(ran)燒后形(xing)成的一種(zhong)似火山(shan)灰質混合材(cai)料。
它是燃(ran)(ran)燒煤(mei)(mei)的(de)發(fa)電廠將煤(mei)(mei)磨成(cheng)100微(wei)米以下的(de)煤(mei)(mei)粉,用預熱空氣噴入(ru)爐膛(tang)經燃(ran)(ran)燒形成(cheng)懸浮狀(zhuang)態(tai),產(chan)生混雜有大量不(bu)燃(ran)(ran)物(wu)的(de)高溫煙氣,經集塵(chen)裝置捕集就得到了(le)粉煤(mei)(mei)灰(hui)。粉煤(mei)(mei)灰(hui)的(de)化學組成(cheng)與粘土質相似,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)化鈣和未燃(ran)(ran)盡(jin)碳。
工作原理
濕粉(fen)煤灰(hui)(hui)由(you)供料(liao)(liao)(liao)裝(zhuang)置進(jin)(jin)入三(san)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)內(nei)(nei)層(ceng)(ceng)(ceng),實(shi)現(xian)順(shun)流烘(hong)干(gan)(gan), 粉(fen)煤灰(hui)(hui)在內(nei)(nei)層(ceng)(ceng)(ceng)的(de)抄板下(xia)不(bu)斷(duan)抄起、散(san)落呈(cheng)螺旋(xuan)行(xing)進(jin)(jin)式(shi)實(shi)現(xian)熱(re)交換,物(wu)(wu)料(liao)(liao)(liao)移動(dong)至(zhi)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)另一端進(jin)(jin)入中(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)行(xing)逆流烘(hong)干(gan)(gan),物(wu)(wu)料(liao)(liao)(liao)在中(zhong)層(ceng)(ceng)(ceng)不(bu)斷(duan)地被反(fan)復(fu)揚(yang)進(jin)(jin),呈(cheng)進(jin)(jin)兩步(bu)(bu)退一步(bu)(bu)的(de)行(xing)進(jin)(jin)方(fang)式(shi),物(wu)(wu)料(liao)(liao)(liao)在中(zhong)層(ceng)(ceng)(ceng)既充分吸收內(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)散(san)發的(de)熱(re)量,又吸收中(zhong)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)熱(re)量,同時又延長了干(gan)(gan)燥(zao)時間,物(wu)(wu)料(liao)(liao)(liao)在此(ci)達到干(gan)(gan)燥(zao)狀態(tai)。物(wu)(wu)料(liao)(liao)(liao)行(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)另一端而落入外(wai)層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)(liao)(liao)在外(wai)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)內(nei)(nei)呈(cheng)矩(ju)形(xing)多回路方(fang)式(shi)行(xing)進(jin)(jin),達到干(gan)(gan)燥(zao)效果的(de)物(wu)(wu)料(liao)(liao)(liao)在熱(re)風作用下(xia)快速行(xing)進(jin)(jin)排出滾(gun)(gun)筒(tong)(tong),沒有達到干(gan)(gan)燥(zao)效果的(de)濕物(wu)(wu)料(liao)(liao)(liao)因(yin)自重而不(bu)能快速行(xing)進(jin)(jin),物(wu)(wu)料(liao)(liao)(liao)在此(ci)矩(ju)形(xing)抄板內(nei)(nei)進(jin)(jin)行(xing)充分干(gan)(gan)燥(zao),由(you)此(ci)達到干(gan)(gan)燥(zao)效果,完成(cheng)干(gan)(gan)燥(zao)過程。
設備特點(dian)
該設(she)(she)備(bei)(bei)與其他干(gan)燥設(she)(she)備(bei)(bei)相比(bi),生(sheng)產(chan)能力(li)大(da),可(ke)連續操(cao)作(zuo); 結構(gou)簡單,操(cao)作(zuo)方便;故(gu)障少,維(wei)修費用(yong)低;適用(yong)范圍廣,流體阻力(li)小,可(ke)以用(yong)它(ta)干(gan)燥顆料狀物(wu)料,對于那些附著性大(da)的物(wu)料也很有(you)利;操(cao)作(zuo)彈性大(da),生(sheng)產(chan)上允(yun)許產(chan)品(pin)的流量(liang)有(you)較大(da)波(bo)動范圍,不會影響產(chan)品(pin)的質量(liang);清(qing)掃容易。