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(shi)燃燒煤的(de)發(fa)電廠(chang)將煤磨成(cheng)(cheng)100微米以下的(de)煤粉(fen)，用預熱空氣噴入爐膛經(jing)燃燒形成(cheng)(cheng)懸(xuan)浮狀態(tai)，產生混(hun)雜有大量不燃物的(de)高溫煙氣，經(jing)集塵裝置捕(bu)集就得到了(le)粉(fen)煤灰。粉(fen)煤灰的(de)化(hua)(hua)(hua)學(xue)組成(cheng)(cheng)與(yu)粘土質(zhi)相似，主要成(cheng)(cheng)分(fen)為(wei)二氧化(hua)(hua)(hua)硅、三(san)氧化(hua)(hua)(hua)二鋁、三(san)氧化(hua)(hua)(hua)二鐵、氧化(hua)(hua)(hua)鈣和未(wei)燃盡碳。

工作原理

濕(shi)(shi)粉(fen)煤灰由供料(liao)(liao)(liao)(liao)裝置進(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)內層(ceng)(ceng)(ceng)(ceng),實現(xian)順(shun)流(liu)烘(hong)干(gan)(gan), 粉(fen)煤灰在(zai)內層(ceng)(ceng)(ceng)(ceng)的(de)抄板(ban)下(xia)不(bu)斷抄起(qi)、散(san)落呈螺旋行(xing)(xing)進(jin)式實現(xian)熱交換，物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)移動至(zhi)內層(ceng)(ceng)(ceng)(ceng)的(de)另一端進(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng)(ceng)，進(jin)行(xing)(xing)逆流(liu)烘(hong)干(gan)(gan)，物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反(fan)復揚進(jin)，呈進(jin)兩步退一步的(de)行(xing)(xing)進(jin)方式，物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)既充分吸收(shou)內層(ceng)(ceng)(ceng)(ceng)滾筒(tong)散(san)發的(de)熱量，又吸收(shou)中(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)熱量，同時(shi)(shi)又延長了干(gan)(gan)燥時(shi)(shi)間，物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)此(ci)達到(dao)(dao)干(gan)(gan)燥狀態。物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)行(xing)(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)(ceng)另一端而落入(ru)外層(ceng)(ceng)(ceng)(ceng)，物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)(ceng)滾筒(tong)內呈矩(ju)形多回路方式行(xing)(xing)進(jin)，達到(dao)(dao)干(gan)(gan)燥效(xiao)果的(de)物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)熱風作(zuo)用下(xia)快速行(xing)(xing)進(jin)排出滾筒(tong)，沒(mei)有達到(dao)(dao)干(gan)(gan)燥效(xiao)果的(de)濕(shi)(shi)物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)因自(zi)重而不(bu)能快速行(xing)(xing)進(jin)，物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)此(ci)矩(ju)形抄板(ban)內進(jin)行(xing)(xing)充分干(gan)(gan)燥，由此(ci)達到(dao)(dao)干(gan)(gan)燥效(xiao)果，完成干(gan)(gan)燥過程。

設備特點(dian)

該設(she)備與其他干燥(zao)設(she)備相比(bi)，生(sheng)產(chan)能力(li)大(da)，可(ke)連續操(cao)作(zuo)； 結構簡單，操(cao)作(zuo)方便；故障少，維修費用(yong)(yong)低；適用(yong)(yong)范圍廣，流體阻力(li)小，可(ke)以(yi)用(yong)(yong)它干燥(zao)顆料狀物(wu)料，對(dui)于那些(xie)附著(zhu)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)品的流量有(you)較大(da)波動范圍，不會影響(xiang)產(chan)品的質量；清(qing)掃容易。