Application of water pinch technology for water and wastewater minimization in aluminum anodizing industries

Abstract

AB STRACT:This study aims to describe the application of water pinch technology in industrial water consumption management in aluminum anodizing industry. Water pinch analysis is a systematic technique for designing, optimization and retrofitting of energy, mass and water recovery networks. The selection of different operations existing in an industry has an important role in correctness of application of pinch technology. Water usages in anodizing industry are various, but researches have been shown that, it has the best efficiency on the selection of rinsing chambers to pinch technology. There are different methods in pinch technology mostly based on mass transfer of single or multiple contaminants. In this research, a new method is used to select effective contaminant to be applied to pinch analysis. This research is based on Mann and Liu's method in single contaminant. But "the guide for classification of raw water, wastewater and recycled water for industrial and recreation" is chosen to use a complex of index contaminants as a single contaminant. This method is very simple and applicable for various industrial processes. By an index contaminant like total dissolved solids, the water usage reduced about 6.7 %. Using pinch technology and this new approach in three rinsing chambers, water usage reduced about 14.4 %.

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“…Эти модели для проектирования или синтеза систем используют упрощённую целевую функцию, определяемую доминирующими в задаче проблемами. Примеры Aggregated models включают: a) модели для предсказания минимума потребления при минимальном количестве элементов в теплообменных [58] и массообменных сетях в условиях перегрузки [59]; b) набор ограничений, основанный на Pinchметоде [60]; c) модели процесса дистилляция для минимизации стоимости потребления [61]; d) реакторные сетевые модели для максимизации выходного продукта [62].…”

Scientific and Technological Bases for Design of Industrial Enterprise’s Resource-Saving Water Management Systems

“…An efficient technique to fulfill the design tasks is the water pinch method, which is a modification of the thermodynamic pinch method for designing of economically optimal resource-saving integrated water management systems. The application of water pinch method is fruitful in designing of water-supply and water-disposal systems as well [17][18][19]. It helps to re-organize the traditional straight-flow system of WUCP to repeatedly-serial one, that will provide the significant reduction of the specific flowrates of fresh water consumption and wastewater disposal.…”

Optimization of Water Reuse Network Using Water Pinch Technology (WPT) by Considering Single Contaminant for Kaduna Refinery and Petrochemical Company, Nigeria

“…The processes that use large amount of water rate such as cooling tower, Ion exchangers, and Service water used in desalter, fuel carbon cracking, Lube plant, caustic treating and laboratory in the refinery were selected [15][16][17][18][19]. They use total rate of 565 m 3 /h which is equivalent to 82.5% of the total water rate used by the refinery.…”