汽輪機高壓加熱器文獻及其翻譯畢業(yè)論文(完整版)
【正文】 制在較小范圍內(nèi)，減少了管系與管板的溫差，可避免管系脹口松弛和管系膨脹不均而引起的漏泄。若原設(shè)計疏水通流面積過小，或由于疏水溫度過高及疏水管布置不合理造成壓降太大使疏水在流動中汽化而造成的疏水不暢，也可考慮擴大疏水調(diào)節(jié)閥窗口面積。 ?。?）維持高加運行的正常水位，是保證高加正常運行的重要條件。后將高加的疏水調(diào)節(jié)閥移至除氧器平臺，這有助于克服疏水管彎頭沖蝕嚴重，管道振動大等問題。檢修中發(fā)現(xiàn)，其密封用堵料被沖跑，且筒壁被水沖刷成坑洼嚴重。2 elbow, tee instead with stainless steel elbow instead of carbon steel elbow, do regular inspection change in time.About high adding startstop Due to the unit is slippery parameters, so startstop high add can along with unit and startstop. High add random startup, load increasing gradually, steam extraction temperature, pressure, and flow rate and the rising water heater is the temperature, metal can be controlled in small range, reduce the pipe and tube plate of temperature, can avoid the pipe to bilge mouth relax and pipe leakage uneven and cause inflation.Of course in high water add startstop control, not once pipe leakage operating more nervous. If high plus using random startstop the ways in which important is normal temperature, temperature drop rate of temperature control, because of the speed and temperature drop directly affected by the thermal stress of the weld. According to experience, usually in the temperature change for export judgement basis. Harbin boiler temperature not greater than suggestion 3 ~ 5 ℃ / min, temperature drop is not more than 170 ℃ / min, Shanghai auxiliary equipment factory proposed regulations ℃ / min and 2 ℃ / min. The temperature drop limit, is due to less than temperature rise, always first stop when the discontinuation of the steam extraction, and water heater, now still through wall temperature higher than water temperature, cold water flows through the pipe, the first in the pipe cooling contraction, easy and tube plate on the bination of causing damage. Taizhou power plant, its high add reflect bundle leakage usually occurs in high add after discontinuation in operation, so not only should attach great importance to speed, also cannot ignore temperature control of temperature drop rate.3. To add discontinuation heat consumption of high impactAccording to the high add operation care for some homemade, maintenance manual calculation steam turbine unit, GaoJiaShi discontinuation heat consumption will increase.4. last word:Whether to add put into operation high unit loads and efficient influence is very big. So, it is hoped that through the above measures of high power countermeasure, and enhance the onset of attention and with all relevant im
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