BOTTOM UNHEADING DEVICE AND METHOD FOR VERTICAL VESSELS

摘要

BOTTOM UNHEADING DEVICE AND METHOD FOR VERTICAL VESSELS An unheading device adapted for unheading vertical vessels such as coking drums and a method for remotely operating the device. The unheading device includes a cover unit for attachment to a lower flange of a coking drum which is fastened by a plurality of swing bolts that are disconnected by remotely operated detensioning equipment, and frame device which can lower the cover unit and a carriage that moves it laterally to one side. A chute attached to the frame can be raised into engagement with the coking drum lower flange for removal of coke from the drum. Following such coke removal, the chute is lowered and the cover unit is moved laterally and remotely reconnected to the coking drum lower flange. Also disclosed is a method for remotely operating the unheading device.