US Patent No. 10,138,425

DELAYED COKE DRUM QUENCH SYSTEMS AND METHODS HAVING REDUCED ATMOSPHERIC EMISSIONS


Patent No. 10,138,425
Issue Date November 27, 2018
Title Delayed Coke Drum Quench Systems And Methods Having Reduced Atmospheric Emissions
Inventorship John D. Ward, Katy, TX (US)
Richard Heniford, Katy, TX (US)
Scott Alexander, Billings, MT (US)
Assignee Bechtel Hydrocarbon Technology Solutions, Inc., Houston, TX (US)

Claim of US Patent No. 10,138,425

1. A system for reducing atmospheric emissions of hydrocarbon vapors in a delayed coke drum quench overflow system, which comprises:an overflow drum connected to a blowdown header line for reducing hydrocarbon vapors and producing a vapor overflow remainder and a liquid overflow remainder;
an overflow tank, connected to the overflow drum by a liquid overflow remainder line, for separating at least one of skim oil, water, coke fines, and tank vapor from the liquid overflow remainder;
an overflow drum vapor line in fluid communication with the overflow drum for transmitting the vapor overflow remainder to a steam line; and
a tank vapor line in fluid communication with the overflow tank for transmitting the tank vapor to an overflow ejector, wherein the overflow ejector includes an inlet in fluid communication with the tank vapor line and an outlet in fluid communication with the steam line for reducing the pressure in the overflow tank to 0 psig.