SEALED DERRICK STRUCTURE FOR POLAR VESSELS

摘要

The present design relates to a sealed derrick structure for polar vessels, wherein an installation space for an exhaust-gas unit is provided on the upper part of the sealed derrick. The sealed derrick structure for polar vessels according to the present design comprises: a sealed derrick; a crown block unit which is formed on an upper part of the sealed derrick, is provided with a crown block on the inside thereof and is formed with an installation working space; and an exhaust-gas unit which is provided in the installation working space, in communication with the outside.