A method for assembling a factory modular prefabricated floating roof

Abstract

The invention discloses a method for assembling a modular prefabricated floating roof in a factory. The floating roof is divided into multiple modules, each module is prefabricated in the factory, and then transported into a storage tank, and the multiple modules and components are assembled according to the structure of the floating roof. Carry out on-site assembly, welding and installation to form a factory modular prefabricated floating roof. The invention greatly reduces on-site work intensity and working time, improves the installation work efficiency of the floating roof, adopts the method of opening a gap in the tank wall or tank roof as the installation channel for the installation of the floating roof, and facilitates the staff to perform assembly, welding and inspection operations .

Description

technical field [0001] The invention relates to the field of floating roofs, in particular to an assembly method of factory modularized prefabricated floating roofs. Background technique [0002] At present, the external floating roof of the storage tank is a single-disc or double-disc steel floating roof welded on site. All are prefabricated, welded and painted on site. The construction period is long; the construction conditions are poor, easily affected by weather and seasons, and the construction quality is difficult to guarantee; the space in the floating cabin is small, and it is easy to cause major safety accidents when welding and painting operations in the narrow space; 2006 At around 19:20 on October 28, 2010, an explosion occurred during the painting of the floating roof of a 100,000-square-meter crude oil storage tank under construction in Dushanzi, Xinjiang, killing 12 people and injuring 12 others. [0003] At present, the main types of internal floating roof...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: because it enters from the DN600 manhole, the skins are very narrow, there are many joints between the skins, the joints connected by bolts and adhesives are not reliable, and people on the floating roof Disturbances when walking or lifting the floating roof will cause leakage at the seams

This will lead to an increase in VOC emissions; there is a gas phase space between the skin and the liquid surface, which is a safety hazard and will also cause an increase in VOC emissions; the volatile gas in the gas phase space between the inner floating roof and the tank roof will condense. Accumulated on the upper surface of the skin to form an effusion that cannot be removed; when a fire breaks out, the skin will deform due to heat, the adhesive will fail when heated, the joints between the skins will crack, and oil and gas will overflow from the cracks. to intensify the fire

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