Feasibility study of prestressed concrete pressure vessels for coal gasifiers

Conference · Sun Dec 31 23:00:00 EST 1978

OSTI ID:6042857

Oland, C. B.; Greenstreet, W. L.; Callahan, J. P.

The use of prestressed concrete pressure vessels (PCPVs) for gasifiers in coal conversion systems has been examined. Conceptual designs for commercial-sized vessels were developed based on an output of 2.64 x 10/sup 8/ MJ/day for the HYGAS process gasifier and 1.32 x 10/sup 8/ MJ/day for the Synthane process gasifier. Circular cylindrical configurations were employed for the single-cavity vessels. Geometry of the liners was essentially the same as proposed for the commercial steel vessel in both cases. Liners for both gasifiers are protected from the process temperature and the deleterious effects of the process media by refractory lining systems. Two liner designs were developed for each type of gasifier based on a hot-liner system and a cold-liner system. The hot-liner is designed to operate at a temperature above the dew point of the process fluid. Insulating concrete is used between the steel liner and the structural concrete. Anchorage is provided by steel anchor studs welded to the liner. The studs extend through the insulating concrete and are embedded into the structural concrete. The refractory is anchored by stainless steel to the inside of the steel liner. Finned tubes through which cooling water is circulated to remove excess heat are located between the insulating concrete and structural concrete. The cold liner, which is restricted to temperatures below the dew point of the process fluid, was selected as the backup design. Each vessel is posttensioned by circumferential strand windings which are confined and anchored in steel-lined precast concrete channels on the outside surface of the PCPV. Linear tendon clusters which are housed in steel ducts provide the axial prestressing. Results of these studies show that the use of prestressed concrete vessels in applications where large, heavy-walled, steel vessels are required is feasible. The advantages of concrete over steel vessels for gasifiers are directly related to vessel size.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6042857
• Report Number(s): CONF-790802--42
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
36 MATERIALS SCIENCE
360600 -- Other Materials
BUILDING MATERIALS
COAL GASIFICATION
COAL GASIFICATION PLANTS
CONCRETES
CONTAINERS
ECONOMICS
FEASIBILITY STUDIES
GASIFICATION
HYGAS PROCESS
INDUSTRIAL PLANTS
MATERIALS
PRESSURE VESSELS
PRESTRESSED CONCRETE
SNG PROCESSES
SYNTHANE PROCESS
THERMOCHEMICAL PROCESSES