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Analysis of a waste-heat boiler by CFD simulation

Abstract

Waste-heat boilers play important roles in the continuous operation of a smelter and in the conservation of energy. However, the fluid flow and heat transfer behaviour has not been well studied, concerning the boiler performance and design. This presentation describes simulated gas flow and heat transfer of a waste-heat boiler in the Outokumpu copper flash smelting process. The governing transport equations for the conservation of mass, momentum and enthalpy were solved with a commercial CFD-code PHOENICS. The standard k-{epsilon} turbulence model and a composite-flux radiation model were used in the computations. The computational results show that the flow is strongly recirculating and distinctly three-dimensional in most part of the boiler, particularly in the radiation section. The predicted flow pattern and temperature distribution were in a good agreement with laboratory models and industrial measurements. The results provide detailed information of flow pattern, the temperature distribution and gas cooling efficiency. The CFD proved to be a useful tool in analysing the boiler operation. (author)
Authors:
Yang, Yongziang; Jokilaakso, A [1] 
  1. Helsinki Univ. of Technology, Otaniemi (Finland)
Publication Date:
Dec 31, 1996
Product Type:
Conference
Report Number:
TKK-V-B117; CONF-9606318-
Reference Number:
SCA: 320304; 360101; PA: FI-97:003308; EDB-97:061563; SN: 97001773816
Resource Relation:
Conference: 3. colloquium on process simulation, Espoo (Finland), 11-14 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 3rd colloquium on process simulation. Proceedings; Jokilaakso, A. [ed.]; PB: 359 p.
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; WASTE HEAT BOILERS; COMPUTERIZED SIMULATION; SMELTING; METAL INDUSTRY; GAS FLOW; HEAT TRANSFER; FLOW MODELS
OSTI ID:
464571
Research Organizations:
Helsinki Univ. of Technology, Otaniemi (Finland). Lab. of Materials Processing and Powder Metallurgy
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE97740683; ISBN 951-22-3092-5; TRN: FI9703308
Availability:
OSTI as DE97740683
Submitting Site:
FI
Size:
pp. 403-415
Announcement Date:
May 14, 1997

Citation Formats

Yang, Yongziang, and Jokilaakso, A. Analysis of a waste-heat boiler by CFD simulation. Finland: N. p., 1996. Web.
Yang, Yongziang, & Jokilaakso, A. Analysis of a waste-heat boiler by CFD simulation. Finland.
Yang, Yongziang, and Jokilaakso, A. 1996. "Analysis of a waste-heat boiler by CFD simulation." Finland.
@misc{etde_464571,
title = {Analysis of a waste-heat boiler by CFD simulation}
author = {Yang, Yongziang, and Jokilaakso, A}
abstractNote = {Waste-heat boilers play important roles in the continuous operation of a smelter and in the conservation of energy. However, the fluid flow and heat transfer behaviour has not been well studied, concerning the boiler performance and design. This presentation describes simulated gas flow and heat transfer of a waste-heat boiler in the Outokumpu copper flash smelting process. The governing transport equations for the conservation of mass, momentum and enthalpy were solved with a commercial CFD-code PHOENICS. The standard k-{epsilon} turbulence model and a composite-flux radiation model were used in the computations. The computational results show that the flow is strongly recirculating and distinctly three-dimensional in most part of the boiler, particularly in the radiation section. The predicted flow pattern and temperature distribution were in a good agreement with laboratory models and industrial measurements. The results provide detailed information of flow pattern, the temperature distribution and gas cooling efficiency. The CFD proved to be a useful tool in analysing the boiler operation. (author)}
place = {Finland}
year = {1996}
month = {Dec}
}