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煙氣擋板門設計原則及技術要求
點擊數:1909    更新時間:2021-5-28    收藏此頁

      擋板門常用(yong)(yong)于電廠或其(qi)它行(xing)業(ye)中的(de)煙管、風(feng)道(dao)(dao)中做截流(liu)(liu)介(jie)質用(yong)(yong),風(feng)門(men)(men)(fēng mén)啟閉(bi)角度(du)(angle)90℃,風(feng)道(dao)(dao)擋(dang)板(ban)門(men)(men)或煙道(dao)(dao)擋(dang)板(ban)門(men)(men),擋(dang)板(ban)門(men)(men)具有全開全關(guan)(guan)兩(liang)個功能(neng),使系統某一管路介(jie)質全部流(liu)(liu)通(tong)或關(guan)(guan)閉(bi)。煙氣脫硫擋(dang)板(ban)門(men)(men)是工業(ye)使用(yong)(yong)廣泛的(de)產品。擋(dang)板(ban)門(men)(men)生產廠家地(di)理位置優越,處于亞(ya)歐大陸橋東(dong)橋頭堡(bao)—連云(yun)港市境內,交通(tong)便利,離(li)機場、火車站、港口(kou)只有幾公里,國家幾條高(gao)速公路通(tong)過本(ben)地(di),本(ben)廠熱(re)忱歡(huan)迎國內新(xin)老(lao)用(yong)(yong)戶來連觀光(guang)旅游(you),洽談貿易,共創美好未(wei)來。 擋(dang)板(ban)門(men)(men)葉(xie)片采用(yong)(yong)鋼(gang)板(ban)模壓成(cheng)形(xing)(xing)或鑄造成(cheng)形(xing)(xing),截面流(liu)(liu)線形(xing)(xing)葉(xie)片確保介(jie)質壓損極(ji)小,框架(jia)(framework)采用(yong)(yong)鋼(gang)板(ban)模壓成(cheng)形(xing)(xing)、型鋼(gang)焊接成(cheng)形(xing)(xing)或鑄造成(cheng)形(xing)(xing),葉(xie)片與(yu)主軸之間采用(yong)(yong)專用(yong)(yong)緊固件(jian)連接,關(guan)(guan)閉(bi)擋(dang)板(ban)風(feng)門(men)(men)安裝(ān zhuāng)在(zai)管道(dao)(dao)上后(hou),葉(xie)片關(guan)(guan)閉(bi)時,其(qi)前后(hou)的(de)密(mi)封(seal)率可達99%以(yi)上,可以(yi)拆(chai)卸任(ren)何(he)部件(jian),并保證在(zai)工作狀態下可以(yi)方便地(di)檢修或更(geng)換部件(jian)。 
      煙(yan)(yan)氣(qi)擋(dang)板門(men)是脫(tuo)(tuo)(tuo)硫(liu)裝置進(jin)入(ru)和退出(chu)運行(Windows)的重要設備,分為煙(yan)(yan)氣(qi)脫(tuo)(tuo)(tuo)硫(liu)(FGD)主煙(yan)(yan)氣(qi)擋(dang)板(包(bao)括(kuo)原煙(yan)(yan)氣(qi)擋(dang)板門(men)和凈煙(yan)(yan)氣(qi)擋(dang)板門(men))和旁路(lu)煙(yan)(yan)氣(qi)擋(dang)板。 在脫(tuo)(tuo)(tuo)硫(liu)系統正(zheng)常運行的情況下,從鍋爐(Boilers)電除塵器尾部出(chu)來的煙(yan)(yan)氣(qi),經(jing)FGD系統入(ru)口擋(dang)板門(men)至升壓風機后(hou)(hou),再由煙(yan)(yan)氣(qi)換(huan)熱(re)器降溫進(jin)入(ru)吸收(shou)塔(ta),脫(tuo)(tuo)(tuo)硫(liu)后(hou)(hou)的煙(yan)(yan)氣(qi)被(bei)煙(yan)(yan)氣(qi)換(huan)熱(re)器加熱(re)(heating )到80℃左右,經(jing)FGD出(chu)口煙(yan)(yan)氣(qi)擋(dang)板門(men)進(jin)入(ru)煙(yan)(yan)囪(cong)。       
      FGD進口(kou)(kou)煙(yan)(yan)(yan)氣(qi)(qi)擋(dang)(dang)(dang)(dang)板(ban)(ban)(Tailgate)門(men)(men)(men)安(an)裝(ān zhuāng)在FGD系統(system)的進口(kou)(kou)煙(yan)(yan)(yan)道內(nei),濕(shi)(shi)電(dian)出口(kou)(kou)煙(yan)(yan)(yan)氣(qi)(qi)擋(dang)(dang)(dang)(dang)板(ban)(ban)門(men)(men)(men)安(an)裝在濕(shi)(shi)電(dian)出口(kou)(kou)煙(yan)(yan)(yan)道內(nei),其(qi)均(jun)由雙層煙(yan)(yan)(yan)氣(qi)(qi)擋(dang)(dang)(dang)(dang)板(ban)(ban)門(men)(men)(men)組(zu)成,當關閉(bi)擋(dang)(dang)(dang)(dang)板(ban)(ban)門(men)(men)(men)時,雙層煙(yan)(yan)(yan)氣(qi)(qi)擋(dang)(dang)(dang)(dang)板(ban)(ban)門(men)(men)(men)之間連(lian)接密(mi)(mi)(mi)封(seal)空氣(qi)(qi),防(fang)止煙(yan)(yan)(yan)氣(qi)(qi)泄漏到FGD及濕(shi)(shi)電(dian)系統內(nei),以保證(zheng)FGD及濕(shi)(shi)電(dian)系統內(nei)的防(fang)腐(fu)襯膠等不受破壞(huai)。為使所有(you)(you)擋(dang)(dang)(dang)(dang)板(ban)(ban)門(men)(men)(men)在設(she)(she)(she)計(ji)(Design)壓力及設(she)(she)(she)計(ji)溫度(du)(du)下具有(you)(you)100%的氣(qi)(qi)密(mi)(mi)(mi)性,擋(dang)(dang)(dang)(dang)板(ban)(ban)門(men)(men)(men)設(she)(she)(she)有(you)(you)密(mi)(mi)(mi)封空氣(qi)(qi)間隙,并配有(you)(you)密(mi)(mi)(mi)封空氣(qi)(qi)站(包括(kuo)密(mi)(mi)(mi)封風(feng)(feng)機(ji)及備用風(feng)(feng)機(ji)),一般(ban)需(xu)要保證(zheng)密(mi)(mi)(mi)封氣(qi)(qi)的壓力高于煙(yan)(yan)(yan)氣(qi)(qi)側壓力500~1250pa。因為百(bai)葉密(mi)(mi)(mi)封不是很(hen)嚴密(mi)(mi)(mi),為防(fang)止冷風(feng)(feng)進入煙(yan)(yan)(yan)氣(qi)(qi)系統造成低溫(dī wēn)腐(fu)蝕(shi)(釋(shi)義:指腐(fu)爛(lan)、消失、侵蝕(shi)等),需(xu)要在密(mi)(mi)(mi)封風(feng)(feng)機(ji)出口(kou)(kou)設(she)(she)(she)置二(er)級(ji)電(dian)加熱(heating )器(qi),由于空氣(qi)(qi)加熱后密(mi)(mi)(mi)度(du)(du)(單位:g/cm3或kg/m3)發生了變化(hua),可以解(jie)決(jue)露點問題(ti),從而防(fang)止酸腐(fu)蝕(shi)的問題(ti),另外還能防(fang)止受熱不均(jun)導致的機(ji)械損壞(huai)。
      為(wei)了保證鍋(guo)爐的(de)安(an)(an)全(safe)運行(xing)(xing),對煙道(flue pipe)擋板(ban)(ban)(ban)(ban)(Tailgate)的(de)啟閉有著嚴格(ge)的(de)要求(qiu),擋板(ban)(ban)(ban)(ban)門(men)(men)(men)的(de)電動執行(xing)(xing)器(final controlling element)要求(qiu)安(an)(an)全保險,其(qi)速度要求(qiu)能(neng)滿足電廠和引(yin)風機的(de)運行(xing)(xing)要求(qiu),一(yi)般煙氣擋板(ban)(ban)(ban)(ban)門(men)(men)(men)的(de)開啟時間要求(qiu)為(wei)16~70S,所有擋板(ban)(ban)(ban)(ban)門(men)(men)(men)要求(qiu)操作(operate)靈活、可靠且(qie)方便檢修。煙氣脫硫(liu)擋板(ban)(ban)(ban)(ban)門(men)(men)(men)通常(chang)采用雙層(ceng)百(bai)葉窗式,除(chu)每層(ceng)擋板(ban)(ban)(ban)(ban)門(men)(men)(men)上配(pei)有密(mi)(mi)封(feng)元件(jian)外,通常(chang)還(huan)向兩(liang)層(ceng)擋板(ban)(ban)(ban)(ban)門(men)(men)(men)的(de)空腔內通入密(mi)(mi)封(feng)氣,以進(jin)一(yi)步(bu)提高擋板(ban)(ban)(ban)(ban)門(men)(men)(men)的(de)密(mi)(mi)封(feng)性。 日(ri)常(chang)檢修的(de)重點在于機械(machinery)部分(fen)的(de)靈活和可靠,需要清除(chu)(clear away)擋板(ban)(ban)(ban)(ban)內部積灰,清洗密(mi)(mi)封(feng)(seal)件(jian)、軸(zhou)套、齒輪及軸(zhou)承(cheng),還(huan)要校對控制(control)器、調節(adjust)器、加油裝(zhuang)置等等。

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