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Technical Brief

Retrofit of a Bubbling Fluidized Bed Pilot Plant From Air Combustion to Oxyfuel Combustion

[+] Author and Article Information
Gabriel M. Faé Gomes

Department of Process Engineering,
Fundação de Ciência e Tecnologia do Estado
Rio Grande do Sul (CIENTEC),
2277 Indústria Avenue,
Cachoeirinha/RS/94930-230, Brazil;
e-mail: gabriel-gomes@cientec.rs.gov.br

Antônio C. F. Vilela

Universidade Federal do Rio Grande do Sul (UFRGS),
Bento Gonçalves Avenue,
9500 – Posto Alegre,/RS,
Setor 6
Centro de Tecnologia
Sala 222 03306-000, Brazil
e-mail: vilela@ufrgs.br

Guilherme P. da Silva Priebe

Fundação de Ciência e Tecnologia do Estado
Rio Grande do Sul (CIENTEC),
2277 Indústria Avenue,
Cachoeirinha/RS 94930-230, Brazil
e-mail: guilherme-priebe@cientec.rs.gov.br

Leandro Dalla Zen

Fundação de Ciência e Tecnologia do Estado
Rio Grande do Sul (CIENTEC),
2277 Indústria Avenue,
Cachoeirinha/RS 94930-230, Brazil
e-mail: dallazen@cientec.rs.gov.br

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received December 26, 2013; final manuscript received October 16, 2014; published online November 7, 2014. Assoc. Editor: Kevin M. Lyons.

J. Energy Resour. Technol 137(3), 034501 (May 01, 2015) (7 pages) Paper No: JERT-13-1348; doi: 10.1115/1.4028861 History: Received December 26, 2013; Revised October 16, 2014; Online November 07, 2014

When using fluidized bed in oxyfuel combustion, process parameters must be adjusted to maintain combustion and control air leakage into the system as there are important changes in gases properties, flow, and temperature. In this sense, this work makes a description of the retrofit of air combustion to oxyfuel combustion in a 0.25 MWth bubbling fluidized pilot plant. Process parameters were analyzed and mass and energy balances were developed to compare air and oxyfuel combustion. Air leakage and fluidization showed to be important to control when proceeding transition to oxyfuel combustion and temperature increase was consequence of radiation mechanism changes.

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References

Figures

Grahic Jump Location
Fig. 1

Combustion and oxyfuel combustion pilot plant flowchart

Grahic Jump Location
Fig. 2

Control volume for mass and energy balances

Grahic Jump Location
Fig. 3

H values for each fan power

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