What are the energy-saving and emission-reduction measures for gasoline hydrogenation units, naphtha aromatization units, aromatic hydrocarbon plants, diesel hydrogenation units, and dry gas hydrogen production units?
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As the title suggests: What are the energy-saving and emission-reduction measures for gasoline hydrogenation units, naphtha aromatization units, aromatic hydrocarbon plants, diesel hydrogenation units, and dry gas hydrogen production units?
For diesel hydrogenation units, if the process design is already perfect, then extra attention should be paid to operational details, such as using efficient catalysts； Control the cold hydrogen valve position ； Control the medium-pressure steam flow rate at the turbine inlet ； The new hydrogen engine (reciprocating type) features a stepless load control system ； Air-cooled motors are controlled using frequency conversion ； Control the oxygen content in the furnace ； Control high-pressure water injection volume ； Use the crude oil filter, etc., as normal.
Naphtha aromatization can use steam condensate as a heat source for the absorber and the depropanizer reboilers, thereby saving steam. In gasoline hydrogenation, heat transfer oil can be used to supply heat to the reboilers of the pre-distillation tower and the stripping tower, thereby enabling effective utilization of the excess dry gas available in the refinery. In my case, tin-based burners are used with heat transfer oil furnaces, and this setup yields very good results with a high heat utilization rate.
Adjustment of the clearance in the new hydrogen generator for diesel hydrogenation
I think the raw material filtration system before the hydrogenation unit is also a technological improvement that helps save energy and reduce emissions. As far as I know, many raw material filtration systems these days use tubular automatic backwashing filtration. However, in practice, backwashing occurs frequently, the pressure drop in the reactor rises rapidly, the amount of water used for backwashing is large, resulting in low efficiency and high operating costs. Many companies basically go straight to cross-line. Fundamentally, it is impossible to remove the gelatin, causing the reactor to tip easily. If this is improved, it would also count as energy conservation and emission reduction.
Optimize process operations, make rational use of heat sources, employ energy-saving equipment, and increase automation