Frozen Assets

The importance of accurate moisture analysis in LNG production

 

One of the LNG indsutry's biggest problems is deciding when the process gas is dry enough to be transported without blocking pipes and shutting down the plant. The moisture measurement process requires a carefully considered methodology, traceable calibration standards and a sesnor technology that can be replied upon to deliver high quality data over extended periods of operation.

In a extract from LNG Industry magazine, two separate case studies are examined. The topics discussed include the need for temperature control, the effect of hysteresis, the need for reliable validation techniques and the benefit provided by fast-responding moisture analyzers.

In both examples, inadequate equipment and operating methodology were responsible for significant losses in production:

 

  • The collected data could not be verified because no appropriate validation checks were enforced.
  • The result was moisture buildup in an LNG train, resulting in a frozen chiller stage and controlled plant shut-down.
  • Loss of revenue was estimated at US$200,000.

 

The article continues by analysing the relative performance characteristics of various portable moisture analyzers, employing a range of sensor technologies. The results show how it is practically impossible to validate moisture readings at the low levels required in the LNG industry, without using technology that employs a temperature controlled sensor and effective self-diagnostic tools.

The profits to be made in the LNG industry are huge, and losses associated with poor moisture analysis can be significant. Choosing the right methodology can be worth millions.

For the full story, download the detailed report below.

 

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