Mobile Oil Treaters (MOT) are oil treaters with moderate crude handling capacities of approximately 5000 BOPD. Designing MOTs is challenging due to severe space constraints, as the vessels are mounted on trailers. Here, a complete design for a 5000 BOPD, two-stage desalter featuring a unique partitioned vessel has been presented. The design addresses several key aspects, including salt and material balances over oil and water streams and dehydration efficiencies. Additionally, detailed specifications for the vessel design and electrode configuration are provided. This work aims to establish a systematic calculation procedure for desalters in Mobile Oil Treaters.
Type of IP
Category of Patent
Department
- Effective crude oil emulsion residence time (τo) is approximately 38 min for the 5000 BOPD
- Desalter can be used with a further increase in flowrate up to 7000-8000 BOPD if the effective oil residence time that reduces to 20 min is sufficient
- Overall 20 cm clearance is provided to prevent the chain formation between the electrode and the vessel
- Recycling water from the outlet of the second separator stage to mix with the crude oil before entering the first separator stage offers the advantage of reducing the amount of water needed from an external supply
- Partitioned vessel design removes fabrication and space issues associated with two separate units (vessels) as in conventional two stage desalters
- Offers several advantages such as simplicity, ease of operation, controllability, and significant process intensification
2
The process and design parameters along with the material and salt balance have been identified and explained.
Oil industry
This invention can be used for the efficient treatment of crude oil recovered from oil wells in both off shore and on shore oil fields