On the morning of November 9, the pre-sulphurization of catalyst for new RLG plant in Anqing Petrochemical Refinery was completed, and DMDS was started as a vulcanizing agent at this project with an amount of about 6.75 tons.
Since the catalyst in the presence of a sulfide state has a higher hydrogenation activity and stability, and RLG device loaded catalyst, protective agent, refining agent and cracking agent containing active metal are Mo-Ni-based metal oxide to Therefore, when the device is put into trial run, it will be pre-vulcanized to transform the active metal MoO3 and NiO of the catalyst into the metal sulphide with higher activity and stability.
In order to ensure the smooth operation of pre-vulcanization, the device prepared enough DMDS curing agent as soon as possible to arrange on-site monitoring of the relevant personnel to ensure that power is readily available for curing agent tank D-113 and curing agent pump P-106. Start vulcanizer pump P-106, according to the provisions of sulfur injection rate into the system vulcanizing agent DMDS. During the installation of special rotation equipment, control the amount of curing agent DMDS injection, to maintain the smooth injection of sulfur pump P-106. Wear air breathing apparatus, every half an hour to take a sample of recycled hydrogen, check the level of vulcanizer tank every hour, according to the concentration of hydrogen sulfide in circulating hydrogen and hydrogen sulfide decreased per hour, adjust and record sulfur injection Volume.At the same time, strict temperature program, control the outlet temperature of the furnace, closely observe the changes in the temperature of the reactor bed and system pressure changes, found abnormalities, and timely measures.In addition, timely adjustment of new hydrogen compressor to the system into The amount of sulfur injection, effluent, hydrogen sulfide concentration in circulating gas, sulfur concentration in water, the amount of new hydrogen supplement, exhaust emissions and other data through the early morning of the 9th, Analysis determined the effect of catalyst presulfiding meet the technical requirements, the end of pre-vulcanization.
