Owing to their excellent vapour–liquid and thermal distribution, Shell HD trays function equally well as top distribution and interbed distribution trays to aid full catalyst utilisation throughout the reactor. Also, unlike other distributors’ designs that require a deep layer of inert distributive packing, Shell HD trays enable the reactor beds to be filled with active catalyst.
Shell’s proprietary nozzle design harnesses vapour momentum to create overlapping coverage, which improves wetting, even in severe fouling applications. In addition to improved production performance, the mechanical configuration of each tray is engineered for easy boltless access, cleaning and catalyst loading, all of which improve turnaround time significantly.
Shell HD trays enable the reactor to operate efficiently for a wide range of feed rates and types (typically −70 to +50% of the normal operating feed rate). This is true for both liquid and gas feeds, although operation with gas feed only is also viable.
In addition to improving catalyst utilisation thereby enabling a longer cycle length, higher throughput or improved product specification, the optimised mechanical design of the HD trays provides a shorter and safer installation time.
Upcoming fuel trends demand new hydroprocessing methods. Shell Global Solutions strives to equip refiners to meet these trends using proprietary reactor internals technology.
Shell HD trays have the potential to vastly improve refiners’ cycle lengths through slower catalyst deactivation, lower inlet temperatures (as required for stringent product specifications) and improved thermal distribution. Documented case studies have demonstrated higher throughput capacity and the ability to process heavier feeds. In one case, Shell HD trays offered up to 30% higher utilisation of the catalyst for hydrotreating reactors and up to 50% more for hydrocracking reactors. Ultimately, Shell HD trays offer improved reactor performance while minimising capital expenditure and investment costs.
Have you considered how you can:
- Increase cycle length and throughput?
- Improve catalyst usage?
- Increase production despite heavier feedstock?
- Develop new, quality products that meet clean fuel specifications?
- Improve safety and cut turnaround times during and after a revamp?
- Process more difficult feeds?
If you answered yes to any of these questions, Shell Global Solutions would like to discuss with you how to help improve your operations and boost your margin. Contact us.