Energy-efficient and environmentally advanced configurations for naphtha hydrotreating process

摘要

Systems and methods of hydrotreating different naphtha feed stocks destined for a refining reforming unit and other applications with less energy consumption than conventionally possible, while producing less greenhouse gas emissions, and/or using a lesser number of heaters and correspondingly less capital investment in such heaters, air coolers, and water coolers, are provided. According to the more examples of such systems and methods, such reductions are accomplished by directly integrating a naphtha stripping process section with a naphtha splitting process section. Additional reductions can also be accomplished through directly integrating a naphtha hydrotreat reaction process section with the naphtha stripping process section.

主权项

1. A system to hydrotreat naphtha feedstocks for provision to a refining reforming unit, the system comprising:
a naphtha splitting process section including a naphtha splitter providing heavy naphtha bottom stream product to a refining reforming unit; a naphtha stripping process section including a naphtha stripper providing bottom stream product to the naphtha splitter; a naphtha hydrotreat reaction process section including a reactor unit providing bottom stream product to the naphtha stripper; a process-to-process heat exchanger unit positioned to receive bottom stream product from the naphtha stripper and bottom stream product of heavy naphtha from the naphtha splitter so that the bottom stream product from the naphtha stripper provides heat energy to the bottom stream product from the naphtha splitter; a first conduit operably connected between a bottom stream product outlet port of the naphtha stripper and a first inlet port in the heat exchanger unit; a second conduit operably connected between a first outlet port of the heat exchanger unit and a naphtha stripper bottom stream product receiving inlet port in the naphtha splitter, the second conduit in fluid communication with the first conduit through the heat exchanger unit; a third conduit operably connected between a bottom stream product outlet port of the naphtha splitter and a second inlet port in the heat exchanger unit; and a fourth conduit operably connected between a second outlet port of the heat exchanger unit and a reboiling inlet port in the naphtha splitter, the fourth conduit in fluid communication with the third conduit through the heat exchanger unit, the naphtha splitter, the naphtha stripper, and the heat exchanger unit operably coupled so that when operationally employed the bottom stream product from the naphtha stripper flowing through the first and the second conduits and associated portions of the heat exchanger unit is in thermal communication with the bottom stream product from the naphtha splitter flowing through the third and the fourth conduits and associated portions of the heat exchanger unit to thereby conduct reboiling of the naphtha bottom stream product from the naphtha splitter through use of the bottom stream product from the naphtha stripper.