Modelling and analysis of a vacuum deaerator

• Main Author: Hussain, Mohd Azlan
• Format: Conference or Workshop Item
• Published: Publ by Univ of Auckland School of Engineering 1990
• Subjects: TA Engineering (General). Civil engineering (General); TP Chemical technology
• Online Access: http://eprints.um.edu.my/7102/; http://www.scopus.com/inward/record.url?eid=2-s2.0-0025623631&partnerID=40&md5=7609363496ca1d5347679658ca983ef1

A deaerator can be used to remove dissolved gases in water for many industrial processes by use of vacuum. The water normally contains non-ionized gases such as oxygen, argon, methane and ionized gases such as carbon dioxide and hydrogen sulphide, which tend to make the water 'sour'. A description of the deaeration process therefore requires the application of the theory of mass transfer and dissociation reactions, which can be complex if these gases co-exist together. In this study, equilibrium models based on mass balances and equilibrium relationships were developed to calculate the concentration and simultaneous gas removal in the effluent liquid stream at each stage. These models include consideration for the formation and ionization of the ionized gases in solution. These models together with various other data and correlations described in this paper formed the basis of the program to evaluate and simulate the deaeration of gases in water using vacuum.