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Title: Sensitivity study of a full-scale industrial spray-injected fluidized bed reactor

Abstract

The industrial fluidized bed reactor (FBR) described here is designed to convert an aqueous solid laden stream into a consistent solid product material. Additionally, the FBR is heated to 650 °C and the aqueous reactant is spray-atomized into the fluidized bed, converting it into a granular solid through a series of heterogeneous chemical reactions. The objective of this study is to use the MFiX two-fluid model as a screening tool to investigate the effects of off-nominal conditions for the purpose of establishing performance guidelines. This information will be helpful to assess whether the identified boundaries of the system are steep or gradual. Initially, 13 independent operating parameters were sampled in a one-at-a-time manner using high, low, and base values and ranked against a set of performance criteria. Five operating parameters were found to have the largest effect (bed particle size, bed particle density, coal particle size, spray feed flow rate, and fluidizing gas flow rate) on three quantities of interest—bed differential temperature, solids velocity, and bed voidage. Latin hypercube sampling was used to generate a minimal number of random values for various combinations of input parameters. The spray feed flow rate was the most significant parameter for the temperature differences,more » and the coal particle and bed particle size were significant contributors. The bed particle size had the largest effect on the low velocity of the bed particles, with the coal particle size as a contributing second effect. The high solid packing shows the coal particle size with the largest effect, and significant secondary contributions from the feed flow rate and fluidizing gas flow rate. Finally, the fits to the five-dimensional Gaussian Process models were 0.7797, 0.8664, and 0.9440 for the temperature, velocity, and solids packing respectively.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1477232
Report Number(s):
INL/JOU-17-43106-Rev000
Journal ID: ISSN 0032-5910
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
Powder Technology
Additional Journal Information:
Journal Volume: 334; Journal Issue: C; Journal ID: ISSN 0032-5910
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; fluidized bed reactor; gaussian process model; response surface; CFD; MFiX; Sparse Latin-hypercube sampling

Citation Formats

Abboud, Alexander W., and Guillen, Donna Post. Sensitivity study of a full-scale industrial spray-injected fluidized bed reactor. United States: N. p., 2018. Web. doi:10.1016/j.powtec.2018.04.065.
Abboud, Alexander W., & Guillen, Donna Post. Sensitivity study of a full-scale industrial spray-injected fluidized bed reactor. United States. doi:10.1016/j.powtec.2018.04.065.
Abboud, Alexander W., and Guillen, Donna Post. Thu . "Sensitivity study of a full-scale industrial spray-injected fluidized bed reactor". United States. doi:10.1016/j.powtec.2018.04.065. https://www.osti.gov/servlets/purl/1477232.
@article{osti_1477232,
title = {Sensitivity study of a full-scale industrial spray-injected fluidized bed reactor},
author = {Abboud, Alexander W. and Guillen, Donna Post},
abstractNote = {The industrial fluidized bed reactor (FBR) described here is designed to convert an aqueous solid laden stream into a consistent solid product material. Additionally, the FBR is heated to 650 °C and the aqueous reactant is spray-atomized into the fluidized bed, converting it into a granular solid through a series of heterogeneous chemical reactions. The objective of this study is to use the MFiX two-fluid model as a screening tool to investigate the effects of off-nominal conditions for the purpose of establishing performance guidelines. This information will be helpful to assess whether the identified boundaries of the system are steep or gradual. Initially, 13 independent operating parameters were sampled in a one-at-a-time manner using high, low, and base values and ranked against a set of performance criteria. Five operating parameters were found to have the largest effect (bed particle size, bed particle density, coal particle size, spray feed flow rate, and fluidizing gas flow rate) on three quantities of interest—bed differential temperature, solids velocity, and bed voidage. Latin hypercube sampling was used to generate a minimal number of random values for various combinations of input parameters. The spray feed flow rate was the most significant parameter for the temperature differences, and the coal particle and bed particle size were significant contributors. The bed particle size had the largest effect on the low velocity of the bed particles, with the coal particle size as a contributing second effect. The high solid packing shows the coal particle size with the largest effect, and significant secondary contributions from the feed flow rate and fluidizing gas flow rate. Finally, the fits to the five-dimensional Gaussian Process models were 0.7797, 0.8664, and 0.9440 for the temperature, velocity, and solids packing respectively.},
doi = {10.1016/j.powtec.2018.04.065},
journal = {Powder Technology},
number = C,
volume = 334,
place = {United States},
year = {2018},
month = {4}
}

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