泡花堿(jian)(jian)又名(ming)硅酸(suan)鈉(Na2SiO3),水溶液叫做水玻璃,無色(se)(se)、青(qing)綠(lv)色(se)(se)或(huo)棕(zong)色(se)(se)的(de)固(gu)體(ti)(ti)或(huo)粘稠液體(ti)(ti)。 硅酸(suan)鈉是由硅石(石英砂)、純堿(jian)(jian)(或(huo)土堿(jian)(jian))在熔(rong)化窯爐中共熔(rong),冷卻粉(fen)碎制得,其燃料為煤、天然氣、煤氣均可。
泡花堿(jian)生(sheng)(sheng)產原料 泡花堿(jian)生(sheng)(sheng)產工(gong)藝(yi)
泡花堿生(sheng)產原料
生產(chan)泡花堿(jian)(jian)(jian)的原料為石(shi)英砂、純堿(jian)(jian)(jian),將二者按一定比例混(hun)合送至反射窯爐(lu)中(zhong),經高溫煅燒溶(rong)化(hua)(hua)爐(lu)水淬后(hou)包裝即為固(gu)體(ti)泡花堿(jian)(jian)(jian)。固(gu)體(ti)泡花堿(jian)(jian)(jian)有利于運輸、貯存。將固(gu)體(ti)泡花堿(jian)(jian)(jian)在一定溫度、壓力下將其溶(rong)化(hua)(hua)成液體(ti)即為液體(ti)泡花堿(jian)(jian)(jian)。
EINECS號 215-687-4
泡花(hua)堿(jian)生產工藝
泡花(hua)堿(jian)生(sheng)產工藝可(ke)分為干法和濕法兩種,通常所(suo)使用的(de)(de)是干法生(sheng)產固體泡花(hua)堿(jian),再經溶解(jie)轉變成所(suo)需規格的(de)(de)液(ye)體泡花(hua)堿(jian),其轉換率為1∶2.5。
干法生產
將石英砂和鈉鹽(主要指Na2CO3、Na2SO4)攪拌均勻,在1400℃左右的高溫下熔融反應。根據原料不同又分為純堿法和芒硝法。生產過程都包括配料、煅燒、浸溶、濃縮等四道工序。
具(ju)體過程是:
一:配料(liao)與熔(rong)融(rong):純(chun)堿或(huo)芒硝與石英砂按比例,經(jing)攪拌(ban)機(ji)攪均(jun)勻后經(jing)貯槽(cao)、加(jia)(jia)料(liao)斗由(you)螺旋輸送機(ji)加(jia)(jia)入(ru)反射爐或(huo)馬蹄焰(yan)爐進(jin)行熔(rong)融(rong)反應。
二(er):浸溶:熔窯加(jia)入生料時(shi),已熔融的水玻璃即可從下料口流入冷卻(que)槽(cao)中,經小型履(lv)帶式輸送(song)機送(song)入貯料桶內,過磅后(hou)由電(dian)動行車將桶內的玻璃塊吊起倒入滾(gun)筒(tong)內,根據塊子重量(liang)及不同產品規格加(jia)入適量(liang)水,通入蒸汽溶解,蒸汽壓力(li)一(yi)般為(wei)0.4~0.5MPa,液筒(tong)轉速(su)為(wei)2~4r/min,溶解到一(yi)定濃度(du)后(hou)放入沉清槽(cao)內,經自然沉清除去雜質。
三:濃縮(suo):除去雜質后的溶液送(song)到濃縮(suo)槽內進行濃縮(suo),采用(yong)蒸汽間(jian)接加(jia)熱,槽底利用(yong)熔窯煙道氣余熱加(jia)熱,溶液濃縮(suo)至要求濃度時即(ji)為成品。
濕法生產
濕法(fa)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)泡花堿又(you)分為傳(chuan)統濕法(fa)工(gong)藝(yi)(yi)和活(huo)(huo)性(xing)(xing)SiO2常壓生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)工(gong)藝(yi)(yi)兩種(zhong)。傳(chuan)統濕法(fa)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)工(gong)藝(yi)(yi)傳(chuan)統濕法(fa)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)泡花堿產(chan)(chan)(chan)(chan)量高,能耗低(di)(di),勞動強度低(di)(di),原(yuan)料易得(de),但該法(fa)只能生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)模(mo)數小于2.5的(de)(de)產(chan)(chan)(chan)(chan)品(pin),其生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)原(yuan)理(li)是石英砂在高溫燒(shao)堿中(zhong)(zhong)溶(rong)解生(sheng)(sheng)(sheng)成硅酸(suan)鈉。活(huo)(huo)性(xing)(xing)SiO2常壓生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)工(gong)藝(yi)(yi)活(huo)(huo)性(xing)(xing)SiO2常壓生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)泡花堿是在近幾(ji)年(nian)的(de)(de)三(san)廢治理(li)過程中(zhong)(zhong)開(kai)發的(de)(de)一種(zhong)新工(gong)藝(yi)(yi),目前采用(yong)該法(fa)生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)廠家不(bu)多,該法(fa)可生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)模(mo)數為2.2~3.7的(de)(de)任(ren)何(he)產(chan)(chan)(chan)(chan)品(pin)。其機理(li)是利用(yong)工(gong)業生(sheng)(sheng)(sheng)產(chan)(chan)(chan)(chan)中(zhong)(zhong)產(chan)(chan)(chan)(chan)生(sheng)(sheng)(sheng)的(de)(de)副產(chan)(chan)(chan)(chan)品(pin)或(huo)下腳料中(zhong)(zhong)的(de)(de)活(huo)(huo)性(xing)(xing)SiO2(或(huo)硅膠)在常壓下加(jia)熱與燒(shao)堿反(fan)應(ying)生(sheng)(sheng)(sheng)成硅酸(suan)鈉。反(fan)應(ying)方程式與傳(chuan)統濕法(fa)工(gong)藝(yi)(yi)相同。
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