Ammonia concentration analysis for the steam condenser by combining two phase flow CFD simulation with condensation and process simulation

Abstract

Ammonia corrosion in alumi-brass tubes in steam condensers can be a serious problem. It generally occurs in the high ammonia concentration area. In this case, it is planned to replace the alumi-brass tubes by higher grade material, such as cupronickel. Therefore, it is important to minimize the area to be replaced in order to keep the equipment cost down. It is known that the ammonia concentration is related to the degree of corrosion damage. We propose a hybrid analysis method to obtain ammonia concentration by combining two-phase flow Computational Fluid Dynamics (CFD) analysis and network analysis by a chemical engineering process simulator for the tube bundle. Ammonia concentration obtained by the simulation is therefore used to determine the area to be replaced by the higher grade material tubes.

Investigation of the corrosion behavior of aluminum bronze alloy in alkaline environment

“…The current density in the anodic and cathodic branches of all samples was significantly increased at pH = 10.5 compared to the reference sample. Therefore, due to further changes in the anodic branch, the dissolution of copper and the release of metal cations occurred more on the metal surface, which is consistent with the inductively coupled plasma results [33–34].…”