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Design Innovation Paper

Technical and Economic Feasibility Analysis of Using Concentrated Solar Thermal Technology in the Cement Production Process: Hybrid Approach—A Case Study

[+] Author and Article Information
Ricardo Sebastián González

Cemex Latam Holdings,
Cra 35A # 100-16,
Manizales-Colombia,
Caldas 9027, Colombia
e-mail: ricardosebastian.gonzalez@gmail.com

Gilles Flamant

Processes, Materials, and Solar Energy Laboratory,
PROMES-CNRS,
7, rue du Four Solaire,
Font Romeu-Odeillo-Via 66120, France
e-mail: gilles.flamant@promes.cnrs.fr

SOx are produced under the following reactions: Sulfides + O2 → Oxides + SOx CaSO3 + O2 → CaO + SO2 Sulfides and CaSO3 are contained in raw materials.

Calcined hot meal is the name given by cement process engineers to the pulverized material resulting from the calcination step in the conventional cement process.

1Regional Energy and Alternative Fuels Manager for South & Central America and Caribbean.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received June 4, 2013; final manuscript received January 15, 2014; published online February 20, 2014. Assoc. Editor: Wojciech Lipinski.

J. Sol. Energy Eng 136(2), 025001 (Feb 20, 2014) (12 pages) Paper No: SOL-13-1156; doi: 10.1115/1.4026573 History: Received June 04, 2013; Accepted January 15, 2014; Revised January 15, 2014

This work describes the evaluation of concentrated solar thermal (CST) in a conventional cement plant in order to replace from 40% to 100% of the thermal energy required in the process. By using CST at the calcination process in the cement production line, CO2 emissions can be reduced by 40%. The aim of the study is not to propose a detailed design of the solar process but to examine and quantify the various options in order to define the favorable economic conditions and the technical issues to face in a conventional cement plant aiming: substituting energy sources and achieving continuous operation of the cement plant employing a hybrid mode.

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References

Figures

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Fig. 4

Schematic representation for the hybrid process on general operating mode raw meal fed to the solar receiver

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Fig. 3

Schematic representation for the hybrid process on general operating

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Fig. 2

Monthly averaged DNI at plant A

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Fig. 1

Monthly DNI at plant location

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Fig. 6

Total investment and O&M costs for a 3000 TPD clinker solar cement plant

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Fig. 7

Weight distribution costs for a 3000 TPD clinker conventional cement plant

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Fig. 8

Financial indicators for a 3000 TPD solar cement plant

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Fig. 9

PBT behavior with sensitivity parameters variations

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Fig. 10

IRR behavior with sensitivity parameters variations

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Fig. 11

Control volume for the heat and mass balances of the general operating mode heating up a gas stream

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Fig. 12

Control volume for the heat and mass balances of the general operating mode raw meal fed to the solar receiver

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