Cojetix sampling systems reduce costs for refinery
A
Jiskoot product story
Edited by the Engineeringtalk editorial team
Jul 22, 2009
The marine terminal of a northwest US refinery is benefitting in terms of accuracy and cost savings following the installation of two Cojetix sampling systems by Jiskoot.
The two systems replaced the old inline samplers that had failed the water injection certification testing as prescribed in the API 8.2, Appendix A.
The new Cojetix sampling systems have been certified for custody transfer by water injection in accordance with the API 8.2 sampling standards.
In the water-injection proving tests the Cojetix systems achieved a deviation of 0.0014 per cent - 0.0009 per cent against the API acceptance criteria of 0.1489 per cent - 0.1531 per cent for this application.
This provides a reduction in measurement uncertainty resulting in significant annual savings of USD1.3m to USD3.4m (GBP792,000-GBP2m) per year based on crude at USD40/bbl.
Due to space restrictions on the marine dock, the system's Jetmix pumps are mounted on a separate skid away from the fast loop sampling cabinets.
In operation, the crude oil is withdrawn using the large opening take-off quill and pumped to the return Jetmix nozzle assembly to mix the crude being offloaded through the loading arms.
The Jetmix nozzle has a number of specially designed jets that re-inject the crude at high velocity in the vertical lines.
Most importantly, the maximum energy is added during the lowest flow rates when the water concentration is the highest.
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