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1.常减压工段减压炉管辐射段吹蒸汽,减小炉管结焦,减压炉辐射管由于直接受燃烧火焰,炉膛温度常常在790-800℃之间,因此炉管很易结焦。结焦厚达25毫米,严重地影响了开工周期。自在辐射管上接1 1/2“蒸汽管线后,吹入蒸汽,结焦情况大大改善。目前结焦厚度降至2-3毫米。因此操作末期压力降有了显著的下降,原来操作末期原油泵压力8公斤/厘米~2,现在已降到3.5-4公斤/厘米~2。2.减压塔顶改用3~#锭子油打回流,改善了馏分分割。过去减压塔用含蜡柴油打回流,
1. Atmospheric decompression section vacuum tube furnace radiation section blowing steam to reduce the tube coke, vacuum furnace radiation tube due to direct combustion flame, the furnace temperature is often between 790-800 ℃, so the tube is easy to coking. Caking thick 25 mm, seriously affected the start-up cycle. After the free radiant tube is connected to the 1 1/2 ”steam line, the steam is blown in and the coke condition is greatly improved. At present, the thickness of the coke is reduced to 2-3 mm, so the pressure drop at the end of operation has been significantly reduced. Pressure 8 kg / cm ~ 2, has now dropped to 3.5-4 kg / cm ~ 2.2. Decompression tower to use 3 ~ # spindle oil back to play to improve the fractionation. In the past vacuum tower with waxy diesel Fight back flow