Apparatus, components and operating methods for circulating fluidized bed transport gasifiers and reactors
The improvements proposed in this invention provide a reliable apparatus and method to gasify low rank coals in a class of pressurized circulating fluidized bed reactors termed "transport gasifier." The embodiments overcome a number of operability and reliability problems with existing gasifiers. The systems and methods address issues related to distribution of gasification agent without the use of internals, management of heat release to avoid any agglomeration and clinker formation, specific design of bends to withstand the highly erosive environment due to high solid particles circulation rates, design of a standpipe cyclone to withstand high temperature gasification environment, compact design of seal-leg that can handle high mass solids flux, design of nozzles that eliminate plugging, uniform aeration of large diameter Standpipe, oxidant injection at the cyclone exits to effectively modulate gasifier exit temperature and reduction in overall height of the gasifier with a modified non-mechanical valve.
- Research Organization:
- Southern Company Services, Inc., Birmingham, AL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC21-90MC25140
- Assignee:
- Southern Company Services, Inc. (Birmingham, AL)
- Patent Number(s):
- 8,961,629
- Application Number:
- 12/969,997
- OSTI ID:
- 1171097
- Resource Relation:
- Patent File Date: 2010 Dec 16
- Country of Publication:
- United States
- Language:
- English
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