ГРАСИС

Hydrocarbon plants (associated petroleum gas treatment)

Membrane technology based hydrocarbon plants are set to resolve a complex of tasks related to the treatment of associated petroleum gas (APG), regulation of the composition of gases bearing hydrocarbons, carbon dioxide, hydrogen sulfide, nitrogen and other components, as well as disposal of APG.

The Design and Engineering Departments of Grasys JSC have developed the breakthrough technology based on the brand-new custom-designed and patented CarboPEEK membrane having all the required technical and performance characteristics.

The plants have a very small weight and footprint as compared with conventional technologies which, in combination with moderate capital expenditure, helps considerably reduce the payoff period.

In addition, this technology is characterized by the enhanced energy efficiency, as it has low steel intensity and fairly insignificant capital expenditure unlike the alternative technologies. CarboPEEK membrane based APG treatment plants consume nearly no electric power during operation.

Currently, associated petroleum gas in remote and small fields is often diverted to flaring. This is explained by its high content of heavy hydrocarbons rendering impossible the use of such gas as a fuel for gas-fired reciprocating plants and gas turbine power plants. The use Grasys CarboPEEK membrane technology for associated petroleum gas treatment allows to significantly improve associated gas quality by reducing the concentration of heavy hydrocarbons and sulfur-bearing impurities, while completely eliminating aerosols, condensed moisture (dry stripped gas) and solid particles. The degree of associated petroleum gas treatment may vary depending on feed gas quality and customer requirements.

Grasys membrane plants allow significantly reducing gas dew point for both moisture (dry stripped gas) and hydrocarbons, in particular up to the requirements of OST 51.40–93 for cold climatic regions. This helps to resolve the most common problems — excessive gas dew point temperature for hydrocarbons and moisture during gas transportation and recovery from underground gas storage facilities, as well as to dispose of APG at the site or transfer it to gas processing plants.

Grasys designed membrane allows removing primarily hydrogen sulfide, moisture and carbon dioxide from gas, together with heavy hydrocarbons. Grasys membrane plants are capable of treating H2S-bearing gas to the requirements allowing its use as a fuel gas for gas-fired reciprocating plants and gas turbine power plants, oil heating furnaces and boiler houses. In certain cases, gas may be treated up to the requirements of OST 51.40–93.

High-technology Grasys membrane plants allow regulating the calorific value of mine gas and associated petroleum gas with high nitrogen content and conditioning them for use as a fuel for gas-fired reciprocating plants and gas turbine power plants, boiler houses.