Challenge A tank farm located in Texas needs to comply with TCEQ environmental regulations under 30 TAC Chapter 115 (Subchapter F, Division 3) now require that external vents on a Light Aromatic Distillate petroleum storage tank—containing Volatile Organic Compounds (VOCs) with true vapor pressure ≥ 0.5 psia—be sealed and degassed through a vapor‑tight recirculation system routed to an active control device, […]
Challenge A Gulf Coast Refinery scheduled turnaround required taking the Mid Crude and West LEU process units out of service. To achieve this, the units needed to be depressurized and decontaminated of LEL and H2S. Solution Envent supplied two temporary degassing and vapor control systems to safely and efficiently combust VOCs from the two […]
Project Summary: Vapor Processing System for Refinery Emissions Envent Corporation recently completed a comprehensive vapor processing project in Alberta, Canada, leveraging its team of specialists and engineering staff. The project managed and processed vapors containing Volatile Organic Compounds (VOCs), hydrocarbons, and chlorinated hydrocarbons from a refinery, ensuring compliance with environmental regulations while prioritizing safety and […]
Challenge In anticipation of an increase in benzene emissions regulation, a Canadian facility wanted to proactively reduce their outputs for benzene loading operations. Normally, this facility would load both barges and railcars with liquid benzene for shipment to their customers. They would need to implement a vapor control system that could seamlessly integrate with these […]
Challenge A customer facility had two large runoff tanks filled with several million gallons of high pH water associated with groundwater remediation. The customer wanted to drain both vessels to make room for additional wastewater, but each tank’s contents would need to be treated to a neutral pH prior to discharge. Additionally, sulfur precipitates in […]
Challenge A Canada Refinery required the stripping and cleaning of a butane storage vessel as part of a facility transition to renewable diesel service. Envent was assigned the responsibility of degassing the tank and delivering continuous vapor control to minimize tank atmosphere to non-explosive levels. Furthermore, the tank needed to be inerted to prevent oxygen […]
Challenge: A refinery faced significant challenges with high benzene emissions from its wastewater, exceeding the Benzene Waste Operations NESHAP (BWON) requirements. Crude desalter process water, typically directed to the refinery’s Wastewater Treatment Unit (WWTU), contained high levels of dissolved benzene and phenols. These contaminants were not fully removed during primary treatment, leading to their release […]
Challenge During a scheduled refinery turnaround, a customer needed to safely degas their Selective Hydrocracking Unit to perform critical maintenance. The unit would undergo hot hydrogen stripping to purge residual hydrocarbons, but strict emission control limitations at the facility’s flare stack required an alternative vapor control system for handling high volumes of hydrogen and nitrogen […]
Challenge A customer tasked Envent to create a temporary system allowing for the degassing of an LNG-powered freight vessel while it was docked at port in order to perform critical maintenance on the vessel. The solution would allow the customer to continue standard operations without delay, remove Natural Gas Vapors from within the fuel […]
Challenge A West Coast natural gas transmission and distribution company required inspection & maintenance on a segment of methane pipeline. That section of pipe would need to be drepressured/ evacuated and deinventoried prior to performing the required maintenance. The client did not want to release the natural gas into the atmosphere (~1 Million lbs CO2e), […]
Challenge An Envent customer needed to perform maintenance on their distillation unit, SATS unit, and flare. For this project, the customer rented a temporary flare to combust VOCs while their main flare unit was serviced. The customer came to Envent requesting sour gas scrubbing. H2S levels up to 15,000 ppm were to be expected in […]
Challenge The customer needed to clear their hydrotreater of volatile vapors and product in order to allow manned entry for maintenance activities. During this process, there would be limited availability to use the flare or FGRU to purge vapors from the unit. Additionally, there were high concentrations of hydrogen gas and H2S that needed to […]
