Black powder particulate contamination in the post-desalter water was driving unsustainable consumption of single use filters and operating costs of almost US$2
million. The related filter waste was excessive – and avoidable.
In order to save costs, the single use Pentair filters were changed from 10 microns to 30 microns in order to move from a 2 to 3 day replacement cycle to 7 days. The cost of each
filter element change-out was $13,000, including disposal.
However, the 30 micron filters were unable to protect the MycelX VOC and crude removal system from the sub-30 micron contamination, rendering it out of service.
The crude tainted water was then sent out for deep well disposal at a cost of $100K/month for 9 months.
Install 2 magnetic separators – 1 on each desalter water line downstream of the settling tank and upstream of the Pentair filter system.
The Pentair filter elements were subsequently changed to 1 micron finishing filters and the filter element change-out interval went from 7 to 120 days. The solids loading dropped to within allowable limits and the MycelX unit went back into operation, eliminating the need for expensive underground disposal.
Downstream, Refinery, Water