The Vapor Combustion Units (VCU) from GBA are expressly designed to conduct thermal oxidation of hydrocarbons and volatile organic compounds (VOCs), which might result from vapors expelled by “end-of-pipe” activities, such as storage tank out-breathing, ship loading, truck/rail car loading, etc. or coming from vapor recovery units when cannot meet emission guarantees.
Waste gas/vapor streams are routed via a gas blower, passing through one or more staging butterfly valves, including a detonation arrestor near burners, and delivered to our proprietary gas burners, in correspondence of which the mixture is ignited by pilot burners, permanently lit to ensure flame stability and safety.
The burners are internally equipped with anti-flashback devices, suitably designed to prevent flash-backs at low loads, and/or when high hydrogen content is present in the gas mixture.
To minimize electrical power consumption, GBA designs VCUs as Natural draft units, wherein the combustion/quench air are provided through air louvers, located at stack base. A small air blower is generally added to ensure safe pre-purge operation and to support combustion at minimum firing.
In our proven technology, the destruction rate efficiency (DRE) on VOCs is achieved by appropriate residence time, effective mixing, and constant temperature monitoring of the exhaust gas exiting the stack.