Problem

Gas/Gas Turbulent Mixing: Mixing of two different types of natural gas in a large diameter pipeline is not straightforward despite the high velocity, high turbulence and low viscosities. Relying on natural turbulence in a long pipe for mixing results in unrepresentative sampling and long time lags in the control system. Good and fast mixing are essential for continuously monitoring and controlling the Net Heating Value of the gas mixture.

Solution

Gas/Gas Turbulent Mixing: Two Statiflo Motionless Mixers were chosen for installation at a Gas Mixing Station on a major gas transmission system. The parallel lines were 900mm diameter, operating at 32 bar g for mixing Siberian natural gas with regasified Algerian LNG. The Mixers were designed for use in a high velocity, highly turbulent service.

Careful attention to mixing is crucial in situations where even the smallest deviation from good mixing could result in substantial loss of revenue.

Result

Athens area consumers now rely on Statiflo Motionless Mixer technology for the continuous monitoring and control of Net Heating Value of natural gas to their city. The equipment is simple, safe, reliable, without moving parts, requiring no maintenance and is ideally suited for a hazardous duty.