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1.冷爐點火后，控制升溫速度10℃/時，直到90—95℃。因為冷爐時油的粘度大，受熱面管內(nèi)流速較低，管壁油膜較厚，傳熱條件差，如升溫速度過快，容易使局部油膜溫度過高。
2.95—110℃范圍是驅(qū)趕系統(tǒng)內(nèi)殘存水分和熱傳導(dǎo)液所含微量水分階段。升溫速度控制在0—5℃/時范圍，視脫水情況決定。當(dāng)膨脹器放空管處排汽量較大，底部有水擊聲，管道振動加速，各處壓力表指針擺動幅度較大時，必須停止升溫，保持恒溫狀態(tài)，必要時可打爐門減弱燃燒。這個階段時間的長短，視系統(tǒng)內(nèi)殘存水分的多少和熱傳導(dǎo)液的質(zhì)量不同而異，短的可以十幾個小時，長的可能達(dá)數(shù)天，在95—110℃之間反復(fù)幾次，才能將水分排凈。不能盲目加快升溫脫水過程，因為一旦系統(tǒng)內(nèi)水分劇烈蒸發(fā)汽化，體積將急劇膨脹，不僅可能引起“突沸”，使油位急劇膨脹而大量噴出，而且可能會使整個系統(tǒng)壓力急劇升高，導(dǎo)致受壓元件破裂，釀成嚴(yán)重事故。
3.當(dāng)爐內(nèi)和管道中響聲變小，循環(huán)油泵不再出現(xiàn)抽空現(xiàn)象(泵出口壓力降至0.1MPa以下，有沉重的喘氣聲)時，以5℃/時的速度再升溫，但不能超過120℃，直到放空管不再有汽體排出為止。此時，壓力表指針停止波動即為脫水合格。
4.脫水過程完成后，以30℃/時的速度繼續(xù)升溫，但仍應(yīng)注意可能會有殘余水蒸發(fā)，隨時停止升溫。當(dāng)溫度達(dá)到210—230℃時要停下來，這時主要為脫出熱傳導(dǎo)液中的烴組份。熱傳導(dǎo)液中烴組分的存在，使閃點降低，一旦泄漏，引起爆燃的可能性就增大。在液相供爐的熱載體爐中，烴組分以氣相存在，會造成“氣阻”，使循環(huán)泵壓不穩(wěn)，流量不降甚到中斷。
中譯英：
1 Boiler ignition, control temperature rising speed of10 DEG C /, until 90℃ - 95 ℃. Because the cold furnace oil viscosity, heating surface tube flow rate is low, the pipe wall oil film thickness, heat transfer conditions, such as temperature rising speed, easy to make the local oil film temperature too high.
2 95- 110℃is driven system residual moisture and heat conduction liquid phase trace moisture. Temperature control in 0℃ - 5 ℃/ range, depending on the dehydration of decision. When the expander discharge pipe at the exhaust amount is larger, at the bottom of a water hammer in pipeline sound, vibration acceleration, pressure gauge pointer swing throughout the large amplitude, must stop heating, remains constant, if necessary, make reduced combustion furnace door. This stage time, depending on the quantity of water remaining inside the system and heat conduction liquid quality vary, short can be a dozen hours, long may be up to several days, at 95- 110 ℃repeated several times, to the water drain. Not blindly to accelerate warming dehydration process, because once the system water intense evaporation, volume expansion, not only may lead to" boil", so the oil level expands quickly emitted large quantities, but also may cause the whole system pressure increases sharply, leading to compression element rupture, causing a serious accident.
3 When the furnace and pipeline noise decrescent, circulating pump no longer appear to phenomenon(the pump outlet pressure to below 0.1MPa, heavy breathing), at 5 ℃/ speed when heating up again, but not more than120 ℃, until there is no longer a steam vent pipe discharge date. At this point, the pressure gauge pointer stop fluctuation is dehydrated qualified.
4 Dehydration process is completed, with 30 ℃/ speed when temperatures continue to rise, but still should notice there may be residual water evaporation, to stop heating. When the temperature reached 210℃ - 230 ℃to stop, then mainly out of heat conduction in liquid hydrocarbon component. Heat conduction liquid hydrocarbon components in existence, the flash point is reduced, once the leakage caused by explosion, the possibility of increasing. In the liquid phase for furnace heat carrier furnace, hydrocarbon component in a gas phase, will result in a " choke", so that the pump pressure instability, flow does not drop even interrupt.
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