電廠煙氣脫硫塔,電廠專用脫硫塔

 電廠煙(yan)氣脫(tuo)硫(liu)塔塔底(di)板(ban)采(cai)用自動火焰(yan)切割機下(xia)料(liao)，等離子切割機開孔，嚴禁使用手工方(fang)式。拼裝底(di)板(ban)采(cai)用重物擠壓(ya)逐步點焊(han)的(de)方(fang)式，將(jiang)D29號板(ban)先焊(han)于底(di)梁鋼板(ban)上，用銷(xiao)釘(ding)確(que)保底(di)板(ban)與小梁貼緊(jin)，對(dui)塞焊(han)點進行焊(han)接，確(que)保底(di)板(ban)與混凝土接觸密實、無突(tu)起，水平度(du)(du)小于2mm。在格柵支撐梁方(fang)框內底(di)板(ban)平整(zheng)度(du)(du)不大于3mm／m；將(jiang)焊(han)縫(feng)(feng)磨(mo)平，搭接焊(han)縫(feng)(feng)、角(jiao)焊(han)縫(feng)(feng)打磨(mo)成半徑不大于5mm的(de)圓弧過渡；所有(you)焊(han)縫(feng)(feng)作100%抽真空檢(jian)查；所有(you)焊(han)縫(feng)(feng)作100%PT/MT檢(jian)查。

        3.4壁板及加固圈組裝

        壁板(ban)卷制在金屬組(zu)合場進(jin)(jin)行(xing)(xing)。首先硬(ying)化(hua)場地鋪(pu)設(she)平臺，平臺水平度(du)不(bu)大于于2mm，再進(jin)(jin)行(xing)(xing)卷板(ban)機的(de)就(jiu)位工作(zuo)(zuo)，25T汽車吊(diao)配(pei)合作(zuo)(zuo)業。壁板(ban)下料不(bu)能按吸收塔直(zhi)徑下，應該考慮切割縫和焊接縫；卷制時要制作(zuo)(zuo)胎具預壓邊，并計(ji)算弧板(ban)的(de)弦長，保證卷制弧度(du)（制做檢驗弧板(ban)，對每(mei)塊板(ban)進(jin)(jin)行(xing)(xing)檢查）。

        已卷好的壁板應放置在專(zhuan)用圓弧板支(zhi)架上。在運(yun)輸(shu)、存放過程中(zhong)嚴禁平放，防止(zhi)變形。立式(shi)放置應設有防傾倒措施。

使用經(jing)緯儀(yi)(yi)和水平儀(yi)(yi)進行測量，確保(bao)塔體(ti)中(zhong)心基點(dian)的位(wei)置(zhi)準確。以中(zhong)心基點(dian)為準在(zai)(zai)底(di)板上劃出殼體(ti)安裝圓(yuan)周線，在(zai)(zai)底(di)板上劃出殼體(ti)內(nei)(nei)圓(yuan)（13100mm）和外圓(yuan)(13110+12mm)圓(yuan)周線。并設置(zhi)內(nei)(nei)外圓(yuan)定位(wei)板，每6°一塊(kuai)，共60塊(kuai)。如此(ci)方法焊接(jie)筒體(ti)13節以下壁板的定位(wei)卡塊(kuai)。

        以(yi)吸收塔(ta)底板(ban)(ban)(ban)(ban)中心(xin)為圓(yuan)(yuan)心(xin)，以(yi)6469mm為半徑(jing)，均勻布置12根φ159×8  L＝7.2m的(de)(de)管子，兩側(ce)各掛兩只5T倒鏈(lian)，做(zuo)為塔(ta)體頂(ding)部三節壁板(ban)(ban)(ban)(ban)吊裝及(ji)(ji)限(xian)位之用(yong)(yong)(yong)。利用(yong)(yong)(yong)內外圓(yuan)(yuan)定(ding)位板(ban)(ban)(ban)(ban)將(jiang)單塊圈(quan)(quan)(quan)板(ban)(ban)(ban)(ban)固(gu)定(ding)好，圈(quan)(quan)(quan)板(ban)(ban)(ban)(ban)縱(zong)縫(feng)間用(yong)(yong)(yong)正反(fan)螺旋扣做(zuo)臨時連(lian)接(jie)(jie)，用(yong)(yong)(yong)銷釘調(diao)整(zheng)(zheng)兩圈(quan)(quan)(quan)的(de)(de)錯(cuo)邊。待全部頂(ding)圈(quan)(quan)(quan)壁板(ban)(ban)(ban)(ban)圍(wei)攏后(hou)，圈(quan)(quan)(quan)板(ban)(ban)(ban)(ban)合(he)圍(wei)處應為搭接(jie)(jie)狀態(tai)，調(diao)整(zheng)(zheng)好縱(zong)縫(feng)坡(po)口(kou)間隙及(ji)(ji)圈(quan)(quan)(quan)板(ban)(ban)(ban)(ban)上口(kou)水(shui)平度及(ji)(ji)壁板(ban)(ban)(ban)(ban)的(de)(de)垂(chui)直(zhi)度后(hou)，切(qie)割封(feng)口(kou)板(ban)(ban)(ban)(ban)，再(zai)用(yong)(yong)(yong)對口(kou)器連(lian)接(jie)(jie)最后(hou)一(yi)道焊(han)(han)縫(feng)。進(jin)(jin)行(xing)第一(yi)圈(quan)(quan)(quan)壁板(ban)(ban)(ban)(ban)的(de)(de)水(shui)平度、垂(chui)直(zhi)度總體檢驗，合(he)格后(hou)點焊(han)(han)環(huan)形加強(qiang)筋，然后(hou)進(jin)(jin)行(xing)壁板(ban)(ban)(ban)(ban)縱(zong)縫(feng)的(de)(de)焊(han)(han)接(jie)(jie)。第一(yi)圈(quan)(quan)(quan)壁板(ban)(ban)(ban)(ban)找平達(da)到規范要(yao)求(qiu)(qiu)后(hou)，方可安裝下一(yi)圈(quan)(quan)(quan)壁板(ban)(ban)(ban)(ban)。要(yao)求(qiu)(qiu)沿筒體壁板(ban)(ban)(ban)(ban)圓(yuan)(yuan)周等分8至12點分別(bie)測(ce)量垂(chui)直(zhi)度、水(shui)平度、直(zhi)徑(jing)偏差以(yi)及(ji)(ji)圓(yuan)(yuan)弧曲率(lv)，分別(bie)不大于2mm，1.5mm，±8mm，5mm／m。