GBA selects and designs Regenerative Thermal Oxidizers (RTOs) to properly dispose VOC laden lean streams, characterized by a very low Lower Heating Value, in a very energy-efficient manner, through an effective energy recovery in a ceramic heat exchanger package, guaranteeing at the same time regulatory compliance to flue gases emission limits.
Typical applications refer to gaseous waste effluent from a Vapor Recovery Unit (VRU), or streams generated from vessel tanks’ breathing and/or any other emission sources, characterized vapor/gaseous streams with very low concentrations of VOCs.
Our RTOs are designed to attain a minimum DRE of at least 99.5% on VOC emissions and, thanks to the very high heat recovery from hot effluents, with minimal support gas usage in a single forced draft burner – which provides heat to the regenerator beds during the start-up cycle and as needed during the operation to maintain thermal equilibrium at balance temperature. VOC oxidation occurs at high temperature, typically in the range 800-925°C [1472-1697°F], with 1 second residence time as minimum.
The selection of use three canisters, instead of two as some other suppliers do, is based upon the design optimization done by GBA with the aim to avoid fluctuations (read as discontinuity and/or intermittence) in the emission levels during automatic switch-over of operation from one canister to another.
Moreover, this design choice has the advantage to build a unit, ready for future more severe legislations and able to guarantee that emissions are always in compliance with laws without discontinuities/emission picks, that may occur during transition of operation.