缠绕管式换热器在连续重整装置中的应用

Application of Spiral Wound Heat Exchanger in CCR Unit

连续重整装置是以石脑油为原料,在催化剂作用下生产芳烃和高辛烷值汽油组分的重要装置,同时还为加氢装置提供大量的廉价氢源。在连续重整装置中,重整进料换热器的选型对产品结构和经济效益都有重要影响。洛阳石化70×10~4t/a连续重整装置选用板壳式换热器,内漏严重,用缠绕管式换热器替代板壳式换热器,既能满足装置的传热要求,拥有优良的传热工艺性能,又具有耐高温高压、抗操作波动的特点,是连续重整装置中较为理想的高效、高可靠性设备。缠绕管式换热器替代板壳式换热器,节省成本553万元;装置3.5MPa蒸汽和燃料气消耗量明显减少,同时产品结构得到优化,提高了主产品氢气和重整汽油的产率以及重整汽油的辛烷值;重整生成油液体收率可以达到84%左右,芳烃含量可以达到77%左右,每年为企业综合节能创效8681.7万元。

Continuous catalytic reforming （CCR） unit is an important unit which converts naphtha into aro- matics and high octane gasoline components in the presence of catalysts.Also it supplies a large amount of cheap hydrogen for hydrogenation unit.The selection of feed heat exchanger for CCR unit greatly influences the product mix and economic benefit.Hate and shell heat exchanger Company for its 700kt/a CCR unit,but serious inner leakage was found.S isfy the heat transfer requirements of the unit,has excellent of high temperature resistance ,high pressure resistance and was selected by SINOPEC Luoyang piral wound heat exchanger can sat- heat transfer performance ,and has characteristics operation fluctuation resistance,so it is an ideal device with high efficiency and high reliability for CCR unit.Replacing the plate and shell heat exchanger with spiral wound heat exchanger can reduce the cost by 5.53 million Yuan,remarkably reduce the consump- tions of 3.5MPa steam and fuel gas,optimize the product mix ,and improve the yields of main product hydro- gen and reformed gasoline and the octane number of reformed gasoline.The liquid yield of reformate may reach 84%,the aromatic content may reach 77%,and a comprehensive energy saving benefit of 86.871 mil- lion Yuan can be created annually for the enterprise.