Energy balance and exergy of a vertical cell furnace for lime production
Abstract
This paper aims with methodologies and indicators for evaluating the impacts of freshwater use, the existing methods fundamentally analyze the amount of water used in relation to the impacts caused. Taking into account that there is a recognized need to consider the impacts, specifically on life cycle bases, the problem is that the data is considered insufficient or unreliable in the life cycle databases of water use, in addition not The method for evaluating the impact of the life cycle coincides with regard to the estimated impacts on the use of fresh water. These difficulties are highlighted and the advantages, limitations, differences in the results between different methods are analyzed, and the need for an improved methodology for evaluating the impacts of water use on life cycle bases. Quicklime production is a high energy consumer that is also characterized by high CO2 emissions. This work sets out to develop the energetic and exergetic balance of the limestone calcination process in order to identify the most influential factors in fuel consumption. The results show that the destruction of exergy during due to the combustion of the fuel and the transfer of heat and moment of the process are the most irreversible processes. The results also show that the energy and the exergy contained in the exhaust gases represent the main loss of the process. The combination of these factors represents more than 50% of the energy supplied to the process.Downloads
References
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