Piping Vibration - The process Solution Case Study

Problem

A major petrochemical facility was experiencing vibration problems with a piping system, which consisted of piping, pumps, a static mixer, and a heat exchanger. KHE was contracted to perform a mechanical and process analysis of the vibrating system. The client was willing to accept a process solution under two conditions. First, it had to be the most economical solution; and second, the quality of the product had to be maintained.

Solution

KHE developed a structural dynamics model of the piping system using the CAESAR II pipe stress tool. The results of this analysis indicated extensive supporting would be required to solve the problem. KHE created a FLUENT computational fluid dynamics model of mixer area. The model contained several species that were reacting. An assessment of all data suggested that flashing flow was occurring in a local area. Therefore, KHE redesigned the mixer.

Results

The problem was solved for a minimal cost. The plant started up the unit with improved product quality and vibration within acceptable limits.