Energy and exergy analyses of a raw mill in a cement production

Utlu, Zafer; Söğüt, M. Ziya; Hepbaşlı, Arif; Oktay, Zuhal

doi:10.1016/j.applthermaleng.2005.11.016

Cited by 109 publications

(50 citation statements)

References 13 publications

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“…Rasul et al [7] identified the thermal energy conservation opportunities on the basis of energy and exergy balances of the kiln and cooler systems of an existing cement industry. Utlu et al [8] using actual operational data in a cement plant, performed the energy and exergy analysis of the raw mill and raw materials preparation unit in a cement plant for evaluating its performance. Sogut et al [9] investigated the trass mill process of a similar cement industry for the first time in terms of energy and exergy balances.…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analysis in an asphalt plant’s rotary dryer

Peinado

Vega

García-Hernando

et al. 2011

Applied Thermal Engineering

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a b s t r a c tIn this paper, energy and exergy analyses of a rotary dryer employed in a Hot Mix Asphalt (HMA) plant for heating and drying of the aggregates in the mixture is presented. In the analysis, the exergy method in addition to the more conventional energy analysis, is employed to identify and evaluate the ther modynamic losses. The results show that, at design conditions, the plant performs with energy and exergy efficiencies of 0.89 and 0.18, respectively. The energy losses are mainly due to the flue gases. The exergy distribution indicates that the combustion and the heat transfer at different temperatures in the burner yield the highest exergy destruction in the process. A parametric study is conducted for the plant under various operational production parameters, including different humidities of the aggregates and filler content in aggregates, working temperatures and ambient conditions, in order to determine the parameters that affect the plant performance. It is shown that the solids humidity has a great impact on energy requirements. A better and sustainable use of the heat source employed in the dryer is proposed to avoid the high irreversibilities found. Furthermore, operating corrections in the mix or in the exhaust gas temperature are proposed to optimize the performance of the plant.

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Section: Introductionmentioning

confidence: 99%

Energy and exergy analysis in an asphalt plant’s rotary dryer

Peinado

Vega

García-Hernando

et al. 2011

Applied Thermal Engineering

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“…Some research activities have been performed in order to analyze and control energy efficiency in energy-intensive sectors [14]- [16]- [17]. These analyses are mostly driven by economic evaluations; as a matter of fact, in these sectors energy is responsible for a major part of the total production cost.…”

Section: Approaches To Energy Efficient Manufacturingmentioning

confidence: 99%

Introducing Energy Performances in Production Management: Towards Energy Efficient Manufacturing

Cannata

Taisch

2010

IFIP Advances in Information and Communication Technology

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Abstract.Energy consumption is one of the main economic, environmental and societal issues. As stated by recent researches, manufacturing plays a major role in energy consumption. To react to this situation and to go towards Energy Efficient Manufacturing, several initiatives are on-going. One relevant lever that is discussed in this paper and that should be taken into consideration is production management. Present production planning and control policies, which are used to optimize manufacturing processes, do not take into consideration energy efficiency. In this paper, we investigate energy efficiency performance indicators on one side and production scheduling and control practices on the other side. The purpose is to highlight this research gap in literature and start defining next steps towards Energy Efficient Manufacturing.

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“…To address these challenges, there is great interest in optimising the cement production process (Copertaro et al 2015, Utlu et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of the Temperature and the Concentration Profiles of an Industrial Rotary Kiln Used in Clinker Production

Rodrigues

Soares

Junior

et al. 2017

An. Acad. Bras. Ciênc.

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Cement is one of the most used building materials in the world. The process of cement production involves numerous and complex reactions that occur under different temperatures. Thus, there is great interest in the optimization of cement manufacturing. Clinker production is one of the main steps of cement production and it occurs inside the kiln. In this paper, the dry process of clinker production is analysed in a rotary kiln that operates in counter flow. The main phenomena involved in clinker production is as follows: free residual water evaporation of raw material, decomposition of magnesium carbonate, decarbonation, formation of C 3 A and C 4 AF, formation of dicalcium silicate, and formation of tricalcium silicate. The main objective of this study was to propose a mathematical model that realistically describes the temperature profile and the concentration of clinker components in a real rotary kiln. In addition, the influence of different speeds of inlet gas and solids in the system was analysed. The mathematical model is composed of partial differential equations. The model was implemented in Mathcad (available at CCA/UFES) and solved using industrial input data. The proposal model is satisfactory to describe the temperature and concentration profiles of a real rotary kiln.

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Energy and exergy analyses of a raw mill in a cement production

Cited by 109 publications

References 13 publications

Energy and exergy analysis in an asphalt plant’s rotary dryer

Energy and exergy analysis in an asphalt plant’s rotary dryer

Introducing Energy Performances in Production Management: Towards Energy Efficient Manufacturing

Dynamic Analysis of the Temperature and the Concentration Profiles of an Industrial Rotary Kiln Used in Clinker Production

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