Black Liquor Recovery Boiler Performance Improving Through Exergy and Energy Analysis
National Wood and Paper Factories produce materials that are called “Black Liquor” during the process of pulp production from woods by chemical methods and this product is used by a recovery boiler due to high heat value in order to produce steam which is necessity for process and recycle the chemicals. Nowadays, one of the existent requirements of this part of industry is improvement the performance of such type of boilers which have special designing and different operation conditions because of its used fuel.
Black Liquor Recovery Boiler Performance Improving Through Exergy and Energy Analysis
National Wood and Paper Factories produce materials that are called “Black Liquor” during the process of pulp production from woods by chemical methods and this product is used by a recovery boiler due to high heat value in order to produce steam which is necessity for process and recycle the chemicals. Nowadays, one of the existent requirements of this part of industry is improvement the performance of such type of boilers which have special designing and different operation conditions because of its used fuel. One of the available methods in this field is applying thermal equilibrium. Because there hasn’t been considered the irrevocability of process and equipment during thermal equilibrium (first law of thermodynamic), this paper deal with existing irreversibility and its place of occurrence in Black liquor-recovery boiler in one of national wood and paper factories by doing energy and exergy analysis. Exergy waste points have been detected in the studied boiler by applying mass, energy and exergy balance. At the end of study the necessary approaches are provided to use energy in this equipment better and also improve its performance.
