Title: Oxycombustion in transport oxy-combustor

Abstract

A pressurized transport oxy-combustor with different configurations is disclosed. Substantially pure oxygen is fed to the transport oxy-combustor under pressure to combust fossil fuels, generating steam for power generation. The end product is the flue gas containing substantially pure CO2 after moisture condensation. The low excess oxygen necessary to achieve complete combustion in the combustor is scavenged by adding another fuel so that substantially all oxygen fed to the combustor is completely consumed. The capability to operate the transport oxy-combustor as a circulating fluidized bed combustor at very high solids circulation rates makes it unnecessary to use recycled CO2 or flue gas as a means to moderate and control the combustion temperature. The temperature in the combustor is effectively controlled by relatively cooler circulating solids that enter the combustion zone. A small amount of CO2 is recycled for aeration and to convey solids fuel to the combustor.

Inventors:

Vimalchand, Pannalal; Liu, Guohai; Peng, WanWang

Issue Date:

2014-04-08

Research Org.:

Southern Company, Birmingham, AL (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1532089

Patent Number(s):

8689709

Application Number:

13/405,312

Assignee:

Southern Company (Birmingham, AL)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

F - MECHANICAL ENGINEERING F22 - STEAM GENERATION F22B - METHODS OF STEAM GENERATION

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J2208/00141 - Coils
B01J8/0055 - {using cyclones}
B01J8/388 - {externally, i.e. the particles leaving the vessel and subsequently re-entering it}

F - MECHANICAL ENGINEERING F22 - STEAM GENERATION F22B - METHODS OF STEAM GENERATION

F22B1/22 - using combustion under pressure substantially exceeding atmospheric pressure
F22B35/002 - {Control by recirculating flue gases

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  {A CARRIER GAS OR} AIR 

F23C10/10 - the separation apparatus being located outside the combustion chamber
F23C2206/103 - Cooling recirculating particles
F23C2900/10006 - Pressurized fluidized bed combustors

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E20/34 - Indirect CO2 mitigation, i.e. by acting on non CO2 directly related matters of the process, e.g. more efficient use of fuels

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DOE Contract Number:  

NT0000749

Resource Type:

Patent

Resource Relation:

Patent File Date: 2012-02-26

Country of Publication:

United States

Language:

English