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The Minox process was developed by Minox and Norsk Hydro’s Research center back in 1985-1990.
The first unit was delivered to Statoil’s Snorre A Platform in 1991. Since then the process has been continuously improved and optimized and has proven to be a very efficient, robust and reliable way to deoxygenate water. To date about 30 systems have been supplied world-wide.
Minox®Compact – 2-Stage de-oxygenation process of sea-water
A key process feature is the method of contacting the nitrogen stream with the water in static mixers where co-current turbulent flow is achieved, producing highly efficient mixing of water and gas, simultaneously striping the disolved oxygen from the water – to very low concentrations. Does not require any scavenger chemicals.
In all Minox deaeration systems, the nitrogen stripping gas is circulated in a closed loop and regenerated over our chemical reactor, where a purity of at least 99.995 % is achieved.
The low system weight combined with flexible, skid mounted design allows for customization in accordance with the customers’ specifications. Each unit can be tailor made to fit into a given space which makes it possible to install on existing platforms, or when conventional deaeration systems are being upgraded.
The Minox®Tower
Based upon the same basic principle of cycling & purifying nitrogen gas, this system offers a competitive alternative to vacuum & fuel gas de-aerators, yielding a very low residual O2 content. In this system the contacting between the nitrogen stream & the water is done through counter–current flow over a packed bed of structured packing. The system can operate under atmospheric, or a few bar pressure. The danger related to using natural gas as stripping gas is removed.
It is even possible to convert existing vacuum or fuel gas towers into Minox®Tower and makes it possible to increase water flow through the tower. The system allows for a residual O2 content down to 20 ppb or less, without applying scavenger chemicals.
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