The invention discloses a process for online increase of a chill pipeline to a refined-desulfurization pre-hydrogenation catalyst. The process comprises a heater, a hydrogenation pre-convertor, a primary hydrogenation convertor, a primary
zinc oxide desulfurizer, a secondary hydrogenation convertor, a secondary
zinc oxide desulfurizer and a chill header
pipe, wherein the heater, the hydrogenationpre-convertor, the primary hydrogenation convertor, the primary
zinc oxide desulfurizer, the secondary hydrogenation convertor and the secondary zinc oxide desulfurizer are arranged sequentially, andthe chill header
pipe is used for conveying chill
coal gas; and a plurality of
branch pipes are arranged on the chill header
pipe, and the other end of each
branch pipe is separately introduced to a trough inlet of the hydrogenation pre-convertor, a trough inlet of the primary hydrogenation convertor and a trough inlet of the secondary hydrogenation convertor so as to control a temperature of a
bed layer. According to the process, through increasing a
coal gas chill header pipe at the trough inlets of the hydrogenation convertors, the catalyst
bed layer is liable to overtemperature during curing or new trough pouring of a replaced raw catalyst, added chill
coal gas is used for cooling the catalyst
bed layer when the temperature of the bed layer rises too fast, so that the problem of shutdown curing is avoided, online curing is achieved, the production output of LNG (
Liquefied Natural Gas) is not affected, and production loss is reduced.