DSolv-EX Cleaning Application
equip> 300,000 bpd Refinery | Equipment Cleaned | FCCU Main Fractionator Tower
Delta Tech Service’s DT-1000 (chemical) and a vapor cleaning process was chosen as the preferred method for degassing and degreasing during this major FCCU shutdown. Additionally, the use of Delta Tech Service’s DSolv-EX was selected to be added to the LCO(light cycle oil) flush during the de-inventory phase while shutting down the unit. DSolve-EX is Delta Tech Service’s proprietary heavy oil degreaser. In this application, DSolv-EX acted as an enhancer to the LCO flush.
The refinery wanted as much coke as possible removed from the bottom of the tower so maintenance could begin immediately in an oil free environment. The main fractionator was a critical path on the turnaround due to the amount of scheduled maintenance. Staying on, or getting ahead of schedule, was critical. The vapor phase cleaning took less than 12 hours.
“We have never had results like this in the past. We are used to seeing several feet or rock hard coke in our main fractionator.”
~ Unit Owner
Upon completion of the vapor phase cleaning using DT-1000, all captured samples tested hydrocarbon, H2S and benzene free. Contractors and refinery professionals were able to enter the vessels without delay as expected. After gaining entry to the tower, the only coke left in the bottom was light and flaky.
Historically it took 5 to 7 shifts of mechanical cleaning to remove the coke from the main fractionator. This refinery had less than a shift of easy shoveling after using DSolv-EX as an LCO enhancer. This allowed the refinery to begin maintenance well ahead of schedule and wrap up the turnaround early.
“The residual coke in the bottom was light and oil free. A little sweeping and a few buckets, and we were done.”
~ Unit Owner
“You guys were great to work with. From planning to setup to execution. It felt like a partnership.”
~ Unit Owner
- No wastewater issues occurred
- No safety issues occurred
- No environmental releases
- No exposures to hazardous or toxic gases/vapors
Exceptional People | Specialized Equipment | Leading Edge Chemistry
The value is clear. Delta Tech Service has the experience, proprietary chemistry, processes and equipment to delivery world decontamination results during your next turnaround or outage.
Please feel free to reach out to one of their highly skilled team members with any questions or inquiries on services that can be tailored to your specific needs at (707) 745-2080.