Chwan Yee, Foo (2003) Maximising water recovery through water pinch technology: the water cascade table. In: Environmnet Conference, 2003, Pulau Pinang.
The environmental impact of industrial wastewater and higher cost of raw are serious challenges facing the chemical process industries nowadays. From the focus on the end-of-pipe treatment in the 1970s, chemical manufactures have increasingly emphasized on the waste minimisation policies where pollutants are mitigated at the source. Less pollutant translates into less raw water cost as well as reduced wastewater treatment cost. One of the key techniques addressing the systematic design of water recovery network is the well-known water pinch technique. This paper will demonstrate a newly developed tool called the water table (WCT) to establish the minimum utility (water) requirement for a maximum water recovery (MWR) network. This tool has been adapted from water surplus diagram which has overcome the previous assumed mass transfer model for water-using operations. Yet, the WCT which is tabulated in nature, has overcome the tedious graphical drawing exercise and inaccuracy problem associated with water surplus diagram. A downstream petrochemical case study of acrylonitrile (AN) production plant will be used to illustrate this newly developed tool. Prior to network design, the WCT locates the minimum water consumption as well as the waste water generation for MWR network for this process.
|Item Type:||Conference or Workshop Item (Paper)|
|Uncontrolled Keywords:||water minimisation, maximum water recovery, water cascade table, minimum utility target|
|Deposited By:||Liza Porijo|
|Last Modified:||08 Feb 2012 04:40|
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