Abstract
This paper discusses the demister scaling issue in (MSF) 2 x 5000 m(3)/day Sidi Krir Desalination Unit's site, and how like this issue affects directly in the performance of this system and in production rate too, which decreases gradually till 50%, in addition the unscheduled outage costs for acid cleaning or replacement of these demister sheets by new ones.
The fixing of an online cleaning system during operation was proposed using the flow of condensate brine heater discharge pumps through two headers are fixed at the both lateral side of those stages in which the scaled demisters were recorded. The proposed system will maintain the performance and saves the costs of chemical cleaning and the unscheduled outage of the system. The technical and economical advantages of this proposal are highlighted.