汽輪機(jī)高壓加熱器文獻(xiàn)及其翻譯畢業(yè)論文-免費(fèi)閱讀
【正文】 因此，希望通過以上的措施對策，提高電廠對高加投用的重視，并切實(shí)開展各項(xiàng)有關(guān)的改進(jìn)工作。如果高加采用隨機(jī)啟停的方式，其中重要的是溫升、溫降率的控制，因?yàn)闇厣?、溫降的速度直接影響焊縫受到的熱應(yīng)力。將高加疏水閥裝到疏水進(jìn)入下一設(shè)備的進(jìn)口附近，如將高加疏水閥由零米層移至除氧器平臺，對防止疏水在管道內(nèi)汽化而引起的三大通病有一定作用。當(dāng)無水位運(yùn)行時(shí)，上一級的蒸汽通過疏水管道直接進(jìn)入下一級高加的汽側(cè)，從而使部分高參數(shù)的蒸汽取成了下一級較低參數(shù)的蒸汽，降低了回?zé)嵝Ч?，且破壞了各加熱器間的正常參數(shù)關(guān)系。 水位計(jì)及水位訊號裝置不能正常運(yùn)行 水位計(jì)漏是各電廠的普遍問題，我廠原老廠的高加水位計(jì)經(jīng)常出現(xiàn)泄露現(xiàn)象，某電廠1號機(jī)高加自投運(yùn)以來一直漏，電接點(diǎn)投運(yùn)后不久即壞，看不準(zhǔn)，反映水位計(jì)與實(shí)際情況不符?！ 「呒映鋈肟谒腋舭逍孤?。如因故障必須停用高加時(shí)，應(yīng)按照制造廠規(guī)定的高加停用臺數(shù)和負(fù)荷的關(guān)系，或根據(jù)汽輪機(jī)抽汽壓力來確定機(jī)組的允許最大出力。關(guān)鍵詞：高壓加熱器；泄漏；投入率；對策 Leak。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 heater the normal parameter relation between. While steam, water flows through the smuggling of succoth bundle tail water cooling section special bundle erosion hazard is great. In addition, this two phase flow will also serious scour hydrophobic pipelines and accessories, and causes vibration of succoth, especially pipe elbow and scanty water regulator damage is bigger. Therefore, the plants should be prohibited from running without water. Longterm Automatic adjustment can meet various thermal running conditio
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