Abstract: A coal tar processing project with slurry-bed hydrogenation unit as the leader adopts the full hydrogenation routing. In order to reduce hydrogen loss and energy consumption of hydrogen system, the design of hydrogen system in the whole plant is optimized. Such as setting reasonable operation pressure of refinery hydrogen network, recovering hydrogen from hydrogen-rich gas discharged by hydrogenation units, optimizing hydrogen purification scheme of the coal to hydrogen production system, and centralized supply of high-pressure new hydrogen, et al. Based on the coal tar processing capacity of 1.5 MM TPY, about 77 600 dam³ of hydrogen can be recovered from the hydrogen-rich gas discharged by hydrogenation units every year, and 8 000~16 000 dam³ of hydrogen can be multi recovered from the coal to hydrogen system. At same time, the methane in the coal to hydrogen production system can be recovered to produce LNG. The optimized design scheme can not only reduce the project investment, reduce the operation cost of the unit and improve economic benefits, but also improve the stability and reliability of unit operation.

Key words: coal tar processing project, hydrogen system, pressure of new hydrogen network, hydrogen rich emission gas, coal to hydrogen production system, centralized new hydrogen supply

摘要： 介绍了以悬浮床加氢装置为龙头的工艺装置,采用全加氢路线加工煤焦油时,在设计过程中为减少炼油厂氢气损失、降低氢气系统能耗,通过设定合理的炼油厂氢气管网运行压力、回收各加氢装置排放富氢气体中的氢气、煤制氢系统氢气提纯方案优化、集中供应高压新氢等设计优化,以1.5 Mt/a煤焦油加工量计算,每年可回收各加氢装置排放富氢气中氢气约77 600 dam³,多回收煤制氢系统氢气8 000~16 000 dam³,同时回收煤制氢系统中的甲烷生产液化天然气,不仅有利于减少项目投资、降低工厂运行成本、提高经济效益,而且可以提高工厂运行的稳定性和可靠性。

关键词: 煤焦油加工项目, 氢气系统, 新氢管网压力, 富氢排放气体, 煤制氢系统, 集中供应新氢