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1771-A2BK
1771-A2BK
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上架日期:2019-08-12 17:06:36
產(chǎn)地:美國
發(fā)貨地:福州
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最少起訂:1個
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    1771-A2BK現(xiàn)貨 in stock! 歡迎來電咨詢~?。?

    1771-A2BK


     大唐南京電廠建設(shè)規(guī)模是2臺660MW超超臨界燃煤發(fā)電機(jī)組。按照大唐集團(tuán)公司的精神和設(shè)計(jì)原則:第一要采用新技術(shù),來提高自動化水平,第二要降低電廠的建設(shè)投資成本,第三在運(yùn)行之后,要進(jìn)行運(yùn)行方式的改革,以實(shí)現(xiàn)減員增效。按照這樣一個原則,在輔助車間的技術(shù)方案選型上,打破了常規(guī)方案的局限,選用了集中控制方案;在硬件平臺的選擇上,將PLC和DCS放在一起進(jìn)行比較,最終經(jīng)過招投標(biāo)選擇了性價比更好,更加適合集中控制應(yīng)用要求的科遠(yuǎn)NT6000分散控制系統(tǒng)。同時在部分系統(tǒng)中,采用了現(xiàn)場總線技術(shù),為現(xiàn)場總線技術(shù)在火電廠的應(yīng)用,進(jìn)行了有益的嘗試。
      1、控制系統(tǒng)配置
      大唐南京電廠全廠輔助系統(tǒng)(車間)集中控制系統(tǒng)的控制范圍包括:綜合泵房、凈水系統(tǒng)、鍋爐補(bǔ)給水系統(tǒng)、兩臺機(jī)組的凝結(jié)水精處理及再生設(shè)備,化學(xué)取樣加藥系統(tǒng)、機(jī)組排水槽、脫硝氨區(qū)、工業(yè)和脫硫廢水處理、生活污水處理、煤泥水處理、暖通、輸煤、除灰系統(tǒng)、除渣、電除塵和脫硫等工藝系統(tǒng)。按照工藝系統(tǒng),控制系統(tǒng)分成水務(wù)控制系統(tǒng)、灰煤渣控制系統(tǒng)、脫硫控制系統(tǒng);其中水務(wù)控制系統(tǒng)監(jiān)控點(diǎn)設(shè)在主控室內(nèi),灰煤渣控制系統(tǒng)、脫硫控系統(tǒng)監(jiān)控點(diǎn)設(shè)在輔控綜合樓,每個監(jiān)控站均為全功能站,能夠監(jiān)控和操作全廠輔網(wǎng)設(shè)備狀態(tài),同時通過權(quán)限設(shè)置不同的用戶,區(qū)別監(jiān)視和操作輸煤、除灰、脫硫等工藝系統(tǒng)設(shè)備,構(gòu)建了一個全廠輔助車間集中控制系統(tǒng)。
      1.1、監(jiān)控點(diǎn)配置
      本工程設(shè)置2個值班監(jiān)控點(diǎn)和3個后備監(jiān)控點(diǎn)。值班監(jiān)控點(diǎn)在正常運(yùn)行時完成對輔助車間各系統(tǒng)的監(jiān)控;后備監(jiān)控點(diǎn)作為調(diào)試、試運(yùn)行、檢修時的后備操作點(diǎn),按無人值班考慮。一個值班監(jiān)控點(diǎn)設(shè)在單元機(jī)組集控室內(nèi), 配置4 套輔助車間控制系統(tǒng)操作員站,監(jiān)控對象為水務(wù)控制系統(tǒng);另一個監(jiān)控值班點(diǎn)設(shè)在輔控綜合樓,配置6 套輔助車間控制系統(tǒng)操作員站,監(jiān)控對象為脫硫、輸煤、除灰渣系統(tǒng)。輔控綜合樓工程師站有脫硫工程師站1 套,輔網(wǎng)工程師站1 套、SIS 接口裝置1 臺,歷史數(shù)據(jù)服務(wù)器1 套。3個后備監(jiān)控點(diǎn)按無人值班考慮,分別為化學(xué)水處理2個后備監(jiān)控點(diǎn)、凝結(jié)水1個后備監(jiān)控點(diǎn)。后備監(jiān)控點(diǎn)用于調(diào)試、檢修及試運(yùn)行期間的操作,具備針對本系統(tǒng)的獨(dú)立監(jiān)控能力與組態(tài)調(diào)試能力。
      1.2、控制器與I/O 配置
      整套控制系統(tǒng)配置25對冗余控制器,IO點(diǎn)配置規(guī)模為13000點(diǎn)左右。
      (1)水務(wù)控制系統(tǒng)配置
      綜合泵房、凈水處理配置1對控制器;
      反滲透、化學(xué)除鹽、再生系統(tǒng)及化學(xué)電源系統(tǒng)配置2 對控制器;
      每臺機(jī)組的凝結(jié)水精處理及汽水取樣配置2 對控制器;
      凝結(jié)水精處理再生配置1對控制器;
      暖通系統(tǒng)配置2對控制器;
      工業(yè)廢水處理及脫硫廢水配置2對控制器。
      在廢水系統(tǒng)中采用了profibus現(xiàn)場總線技術(shù),每條總線上分別有DP、PA設(shè)備組成,DP總線包含的設(shè)備有:馬達(dá)控制器、電磁閥導(dǎo)、電動門執(zhí)行機(jī)構(gòu)等; PA總線包含的設(shè)備有:液位計(jì)、壓力變送器、流量等。替代了傳統(tǒng)IO點(diǎn)300點(diǎn)?,F(xiàn)場總線方案與常規(guī)系統(tǒng)相比,減少了常規(guī)IO模件的使用,減少大量電纜及電纜敷設(shè)工作,能夠獲取總線設(shè)備的大量現(xiàn)場信息,降低了工程造價,縮短了施工和調(diào)試時間,系統(tǒng)可靠性高,診斷信息豐富,便于后期維護(hù)。
      (2)灰煤渣控制系統(tǒng)配置
      輸煤綜合樓、轉(zhuǎn)運(yùn)站、雨水泵配置2對控制器;
      輸煤碼頭、煤倉、煤場配置3對控制器;

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    1771-A2BK

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