Iranian Chemical Engineering Journal

Iranian Chemical Engineering Journal

Improving Sustainability in Cement Manufacturing Through Waste Heat Recovery (Case Study: Khash Cement Company)

Document Type : Original Article

Authors
1 PhD. in Chemical Engineering, University of Sistan and Baluchestan
2 Professor of Chemical Engineering, University of Sistan and Baluchestan
3 Associate Professor of Chemical Engineering, University of Sistan and Baluchestan
4 Assistant Professor of Chemical Engineering, University of Sistan and Baluchestan
5 Assistant Professor of Chemical Engineering, Iranshahr Branch, Islamic Azad University, Iranshahr, Iran
Abstract
In this study, the potential for waste heat recovery in the 2600-ton-per-day rotary kiln system of Khash Cement Plant was investigated. A comprehensive mass and energy balance was conducted using operational data. Results indicate that around 40% of the input energy is lost through heat dissipation. The main sources of energy loss are: preheater exhaust gases (28.8%), hot air discharged from the grate cooler (3.6%), and radiation and convection losses from the kiln surface (5%). Two recovery strategies were evaluated: (1) utilizing preheater and cooler exhaust gases through a Waste Heat Recovery System (WHRS) to generate electricity, and (2) recovering heat from the kiln surface using a heat exchanger. Implementing these solutions could increase the thermal efficiency of the system from 50.6% to 67.5%, contributing significantly to energy conservation, operational cost reduction, and environmental sustainability.
Keywords
Subjects

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