May 24, 2012

BHS implements largest ever candle filter plant for amine solution

Two activated carbon modules are a major component of the modular candle filter plant in Turkmenistan. The modular construction principle enabled the BHS candle filter plant to be erected on site in a minimum of time. One of the two candle filter plants for amine solution with a filter area of 80 m² immediately before shipment. Erection of the new gas processing plant at the South Ýolöten natural gas field in Turkmenistan. The new gas processing plant at the South Ýolöten natural gas field in Turkmenistan.

Two activated carbon modules are a major component of the modular candle filter plant in Turkmenistan. The modular construction principle enabled the BHS candle filter plant to be erected on site in a minimum of time. One of the two candle filter plants for amine solution with a filter area of 80 m² immediately before shipment. Erection of the new gas processing plant at the South Ýolöten natural gas field in Turkmenistan. The new gas processing plant at the South Ýolöten natural gas field in Turkmenistan.

BHS-Sonthofen delivered a compact candle filter plant to Turkmenistan in 2011. With an hourly capacity of 300 m³ of amine solution, it is the largest filter plant that BHS has ever built for this application. The project demonstrates once again that BHS has successfully accomplished the evolution from a manufacturer of individual filter components to a supplier of complete plants.

BHS has supplied the filter plant of modular design as part of the crude gas cleaning stage for natural gas production in the South Ýolöten gas field, one of the world’s largest natural gas fields in the South East of Turkmenistan. It is used for cleaning and refining the crude gas in the amine sweetening process step.

For Jürgen Maurer, sales director for the filtration technology division at BHS-Sonthofen, the order represents a milestone in the company’s history: “Whereas we previously used to supply mostly individual filter plants, we now additionally offer our customers the entire spectrum of plant construction from design through to commissioning – including the piping and steel structure, for example, as well as the complete process control engineering. We are thus opening up new market segments as we are now addressing a broader range of customers."

Featuring a filter area of about 80 m² each, the candle filters remove coarse impurities such as piping abrasion from the lean amine, thereby protecting from foreign matter the actual core of the plant, the activated carbon filters for the adsorption process, which were also supplied by BHS, and preventing the formation of foam in the actual amine scrubber. The candle filters regenerate approximately 150 m³ of amine solution per CF filter unit every hour, about a third of which is additionally cleaned in activated carbon filters.

The scope of supply also includes the pre-coat station, the activated carbon filter units, a downstream polishing filter, all pumps and fittings as well as the entire measuring and control technology. The plant is integrated into the customer's process control system.

In the amine sweetening process, the sour gas impurities such as carbon dioxide (CO2 and H2S) are absorbed in a lean amine scrubber and adsorbed by an activated carbon filter. The amine suspension is clarified by the BHS filter systems. They filter solid particles – piping abrasion and dust for example – and thus considerably lengthen the life of the amine solution.

The plant was shipped to Turkmenistan in 2011 in fifteen 40-foot containers. The modular construction principle enabled the plant to be erected in a minimum of time.

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