汽輪機(jī)高壓加熱器文獻(xiàn)及其翻譯畢業(yè)論文(參考版)
2025-06-25 17:28本頁面
【正文】 作者簡介：生于62年12月，畢業(yè)于新疆電力學(xué)校，有著25年的工作及培訓(xùn)經(jīng)驗(yàn)，94年在汽機(jī)專業(yè)任技術(shù)員，2002年成立教培中心任汽機(jī)專業(yè)培訓(xùn)專責(zé),2005年8月調(diào)安全監(jiān)察部任汽機(jī)安全專責(zé),2006年2月到生產(chǎn)管理部至今.。參考文獻(xiàn)：《汽輪機(jī)設(shè)備及系統(tǒng)》，作者：吳季蘭，中國電力出版社出版，出版日期： 1998年。結(jié)束語：高加是否投入運(yùn)行對機(jī)組負(fù)荷和經(jīng)濟(jì)性的影響是很大的。3.把溫降限制值小于溫升值，是由于停用時(shí)，總是先停抽汽，而給水仍通過加熱器，此時(shí)管壁溫度高于給水溫度，較冷的給水流經(jīng)管子，使管子首先冷卻收縮，容易在管子和管板的結(jié)合面上造成破壞。根據(jù)經(jīng)驗(yàn)，通常以出口水溫的變化為判斷依據(jù)。 當(dāng)然高加啟停中水位不易控制，一旦管系泄漏操作比較緊張。 關(guān)于高加的啟停 由于機(jī)組采用滑參數(shù)啟停，故高加可以隨同機(jī)組同時(shí)啟停。彎頭，用不銹鋼彎頭代替碳鋼彎頭，做到定期檢查及時(shí)更換。 ?。?）減緩對疏水管道彎頭的沖蝕?！ 。?）改變疏水閥的位置?！ 。?）加大疏水通流面積。因此，各電廠應(yīng)禁止長期無水位運(yùn)行。而蒸汽夾帶水珠流經(jīng)管束尾部，特別對疏水冷段管束沖蝕危害甚大。水位過低或無水位運(yùn)行，對高加的經(jīng)濟(jì)安全運(yùn)行造成很大危害。運(yùn)行中應(yīng)注意以下問題。究其三大通病之根源，都是由于高加疏水會(huì)產(chǎn)生兩相流體的流動(dòng)。2．42．3疏水管沖刷嚴(yán)重，振動(dòng)很大，其碳鋼彎頭頻繁被沖壞。2．2某電廠機(jī)組在運(yùn)行中給水溫度212．2℃明顯偏低（設(shè)計(jì)值為240℃）。這樣按原設(shè)計(jì)的密封間隙便失去其實(shí)際意義，現(xiàn)廠家在檢修中將原0．70～0．80 mm的間隙減至0．35 mm，并換用高壓密封材料，效果尚好。在檢修后投運(yùn)后，給水溫度明顯提高，但運(yùn)行后不久即回復(fù)到原較低值。 給水自動(dòng)旁路裝置密封設(shè)計(jì)不佳 進(jìn)口聯(lián)成閥殼體內(nèi)旁路套筒間隙處漏。發(fā)電廠高加在實(shí)際運(yùn)行中存在的主要問題如下。 存在的問題 為了確?；鹆Πl(fā)電廠的安全經(jīng)濟(jì)滿發(fā)，各高加均應(yīng)投入運(yùn)行。為此，除了在高加的設(shè)計(jì)、制造和安裝時(shí)必須保證質(zhì)量外，還要在運(yùn)行維護(hù)等方面采取必要的措施，才能確保高加的長期安全運(yùn)行?；?zé)峒訜嵯到y(tǒng)的運(yùn)行可靠性和運(yùn)行性能的高低，直接影響整套機(jī)組的運(yùn)行經(jīng)濟(jì)性，加熱器的投入率是經(jīng)濟(jì)指標(biāo)中重要的一項(xiàng)考核指標(biāo)。 1 s platform, which helps to overe scanty conduit elbow erosion serious, the problems of pipeline vibration. water meter and water level signal devices cannot normal operation Water meter each power plant is the mon leakage problem of old factory, our original high water position idea often appear leak phenomenon, some power station 1 machine has been added into high since a leak, electricity substation contacts shortly after bad, see not, reflecting water meter with reality. about high add scanty water system Deal with high add drain system the three mon fault blocking, vibration and wear is to ensure safe operation, high added an important TouRuLv high plus improve factors. Investigate third big failing, are the root of due to high add hydrophobic will produce twophase fluid flow. According to concerning material is introduced from singlephase flow, when fluid for twophase flow, the flow velocity will expand 20 times above, resistance increase exponentially. We should pay attention to the following problems in operation. (1) maintain high added to the operation level, is to guarantee the normal operation of the high plus important condition. Water is too low or high water level and operate in economic security caused great harm. When no water at runtime, by the steam trap directly into the next level high piping and steam side, thus making the steam take part high parameters under low level became the steam, reduces the parameters of hot effect and damage to each heat
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