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Title: Apparatus, components and operating methods for circulating fluidized bed transport gasifiers and reactors

Abstract

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.

Inventors:
; ;
Issue Date:
Research Org.:
Southern Company Services, Inc., Birmingham, AL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1171097
Patent Number(s):
8,961,629
Application Number:
12/969,997
Assignee:
Southern Company Services, Inc. (Birmingham, AL)
DOE Contract Number:  
FC21-90MC25140
Resource Type:
Patent
Resource Relation:
Patent File Date: 2010 Dec 16
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS

Citation Formats

Vimalchand, Pannalal, Liu, Guohai, and Peng, Wan Wang. Apparatus, components and operating methods for circulating fluidized bed transport gasifiers and reactors. United States: N. p., 2015. Web.
Vimalchand, Pannalal, Liu, Guohai, & Peng, Wan Wang. Apparatus, components and operating methods for circulating fluidized bed transport gasifiers and reactors. United States.
Vimalchand, Pannalal, Liu, Guohai, and Peng, Wan Wang. Tue . "Apparatus, components and operating methods for circulating fluidized bed transport gasifiers and reactors". United States. https://www.osti.gov/servlets/purl/1171097.
@article{osti_1171097,
title = {Apparatus, components and operating methods for circulating fluidized bed transport gasifiers and reactors},
author = {Vimalchand, Pannalal and Liu, Guohai and Peng, Wan Wang},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {2}
}

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