系統(tǒng)組成 循環(huán)水泵是燃機(jī)電廠的主要輔機(jī)之一,其正常出力對電站的安全正常運行有重要意義循環(huán)水泵的控制歷來是電站控制中的重要問題。 燃機(jī)循泵系統(tǒng)由以下結(jié)構(gòu)組成,如圖1。 [align=center] 圖1 燃機(jī)循環(huán)系統(tǒng)[/align] 兩臺循環(huán)水泵分別抽取通過欄污柵的海水,并入一根循環(huán)水母管,經(jīng)過二次濾網(wǎng)再次過濾,送入汽機(jī)凝汽器循環(huán)水系統(tǒng)。由于循泵出口無法安裝逆止閥,每臺循泵后都有出口液壓蝶閥作為循環(huán)水管和循泵的隔離,防止倒水。循泵的冷卻水用于循泵電機(jī)冷卻,采用閉式循環(huán),經(jīng)過冷卻水箱,通過3臺2運1備的冷卻水泵分兩路分別對循泵電機(jī)進(jìn)行冷卻。 可編程控制器(Programmable Logic Controller),簡稱為PLC,由于其高可靠性,便捷的通訊接口,簡易方便的安裝設(shè)計等特點,廣泛的應(yīng)用于各種工業(yè)邏輯控制領(lǐng)域。燃機(jī)循泵控制系統(tǒng)也采用了以微處理為基礎(chǔ)的可編程控制器和工控機(jī)構(gòu)成監(jiān)控系統(tǒng)??刂品绞讲捎肅RT操作員站進(jìn)行監(jiān)視控制,通過CRT畫面和鍵盤對整個工藝系統(tǒng)進(jìn)行監(jiān)視和控制,實現(xiàn)對循環(huán)水系統(tǒng)的數(shù)據(jù)采集,處理,圖象顯示,報警,制表和自動順序控制,完成相關(guān)輔助系統(tǒng)的調(diào)節(jié)功能及局部系統(tǒng)的邏輯控制和聯(lián)鎖保護(hù)。根據(jù)目前的運行管理情況及考慮今后的管理發(fā)展方象,程序控制系統(tǒng)及被控設(shè)備均按有人和無人化值班方式設(shè)計和配置,并預(yù)留遠(yuǎn)程通訊接口以備今后與其他控制系統(tǒng)實現(xiàn)數(shù)據(jù)通訊和遠(yuǎn)方監(jiān)控。
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FANUC MAIN CIRCUIT BOARD A20B-1001-0120 TESTED AND 120 DAY WARRANTY
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FINE SODICK CIRCUIT BOARD PCB_SGC-01C_SGC01C_SGC-01C(BS2) V13_PC 4181345
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Fischer & Porter 686B461U01 Circuit Board
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