汽輪機高壓加熱器文獻及其翻譯畢業(yè)論文-文庫吧在線文庫
【正文】 to the load to determine the steam extraction pressure steam turbine unit of allowable maximum output. Plant high add in actual operation of the main problems existing in the below. water supply auto bypass device sealing design not beautiful Import represent valves casing bypass sleeve clearance place leakage. Found in operation, 15 high temperature with its exports than the original export ℃ temperature low around 6. After the overhaul into water temperature obviously increase, shortly after, but running back to the original relatively low value. Overhaul its seal, found by plugging material was washed run, and certainly some pits scouring by water into inner seriously. So according to the original design of the seal clearance will lose its practical significance, and now will manufacturers in the overhaul of the original ~ mm to mm, and gap with highpressure airproof material change, the effect is good.High add entrances water room clapboard leakage. A power plant in operation of water supply temperature unit obviously low (℃ for 240 ℃) design value. Found in VSD repair gateway water board is very big, and impact, gap between inner cavity with clapboard leave, make water to shortcircuit, after the flood water temperature, obviously rises, can reach 230 ℃. scanty water system automatically puttinginservice proactively adverse We plant of the 8th high add, hydrophobic automatic can39。 countermeasures1. preface Steam turbine thermal heating system is adopted to improve the unit operation of the important means of economic. Back to heat heating system operation reliability and performance directly affected the height, plete unit operation of economy TouRuLv is economic indicators heater in important evaluation indexes. As coalfired power plants to the large capacity, high parameter unit development, high pressure heater add) (hereinafter referred to as high as water supply under pressure and temperature rise accordingly。前言 汽輪機采用回?zé)峒訜嵯到y(tǒng)是提高機組運行經(jīng)濟性的重要手段之一。2．1檢修中發(fā)現(xiàn)出入口水室間隔板被沖擊，縫隙很大，且隔板與筒壁間留有空洞，使給水短路，后加以封死后，給水溫度明顯上升，可達230℃。 關(guān)于高加疏水系統(tǒng) 解決高加疏水系統(tǒng)的三大通病———堵塞、振動及磨損是確保高加安全運行、提高高加投入率的重要因素。另外，這兩相流體還會嚴(yán)重沖刷疏水管道及其附件，并產(chǎn)生振動，尤其對疏水管彎頭及疏水調(diào)節(jié)閥損害較大。對現(xiàn)存的疏水管道特別是彎頭的沖蝕損害，可將調(diào)節(jié)閥后的管道和全部疏水管的彎頭壁加厚，彎頭還可采用局部擴容減速或襯管，用三通代替90176。哈爾濱鍋爐廠建議溫升不大于3～5℃／min，溫降不大于1．7℃／min，上海輔機廠提出的規(guī)定2℃／min和1．2℃／min?！镀啓C運行》，編寫：遼寧省電力工業(yè)局，中國電力出版社出版，出版日期：1995年4月。高加停用對熱耗影響 根據(jù)部頒的高加運行維護手冊，對部分國產(chǎn)汽輪機組作了計算，停用高加時機組熱耗將增加。高加隨機啟動時，負(fù)荷逐漸增加，抽汽溫度、壓力、流量及加熱器水溫是逐漸上升的，金屬的溫升可控
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