关键词: 下吹式热氢汽提, 连续液相柴油加氢装置, 环保停工

Abstract: Plenty of condensate still existed in the bottom pipeline of the up-flowing reactor of the continuous liquid-phase diesel hydrogenation plant of Anqing Petrochemical Company after the shutdown of the hot hydrogen stripping. This has brought great environmental and safety hazards to the plant site. Aiming at such problem, this paper analyzed the limitations of the up-flowing reactor in the process of shutdown. Based on the lessons drawn from the past shutdown maintenance, a down-blowing hot hydrogen stripping process solution was proposed boldly. The proposal provided the detailed operation flow, operation steps, operation difficulties and countermeasures of the down-blowing type, which was implemented during the plant overhaul shutdown in 2019. The implementation results showed that adopting the down-blowing hot hydrogen stripping process solved the problem of residual condensate at the bottom of the reactor completely, and the plant r

Key words: down-blowing hot hydrogen stripping, continuous liquid-phase diesel hydrogenation unit, shutdown for environmental protection