汽輪機(jī)高壓加熱器文獻(xiàn)及其翻譯畢業(yè)論文(文件)
【正文】 uts forward corresponding countermeasures. Keywords: high pressure heater。 There will be in operation by the unit loads of mutation, pump failure, bypass switching caused the sudden pressure and temperature, these would give high add damage. Therefore, in addition to the high add design, manufacture and installation must ensure that quality outside, still in operation and maintenance etc, and take the necessary measures to ensure the longterm safety of operation of high added.2. the existing problems In order to ensure the safety of coalfired power plants ManFa, each high economic add all should is in operation. If because of the failure, should according to GaoJiaShi must be discontinued with specified high manufacturing Numbers and discontinuation of relationships, or according 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?；?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)。 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。 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。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。2．22．3究其三大通病之根源，都是由于高加疏水會(huì)產(chǎn)生
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