Integrally Geared (IG) Compression for cryogenic, high pressure BOG handling – A novel approach to increase reliability, efficiency and lower CAPEX and OPEX costs.
Managing excess boil off gas (BOG) is a critical process along the LNG value chain. Whether in transportation, transfer and/or offloading, when the temperature of LNG increases BOG is created. Managing BOG is key to maintaining tank pressure as well as the integrity of the stored product.
Emerging technologies in tank construction and compression technologies have allowed for the capture and reliquifaction of BOG. Previously the excess gas would be flared off into the environment, where today we can capture the excess gas, compress it and return it to storage.
Using their experience with integrally-geared turbocompressor technology, Atlas Copco Gas and Process has engineered a six-stage compressor to handle excess BOG. This compact, efficient turbocompressor features two cryogenic stages and four warm stages mounted on a shared gearbox and skid, reducing machine complexity while allowing a single BOC compressor to handle the duty of two or more beam-type compressors.
In this presentation, the viewer will get an overview of integrally-geared technology, as well as the construction and details for this application.
