Changed hydrogen scheme
Hydrogen-bearing gas (HBG) has been given new life at the Refinery. It is returned to the operation process instead of being burnt in the furnaces of the production units.
Due to the heterogeneous feedstock the hydrogen consumption at the hydrotreatment units widely varies. A positive hydrogen balance is maintained at the plant in order to avoid hydrogen deficiency in case of the sharp consumption increase. The excess hydrogen is discharged via GO-2 Unit to the flare system, which leads to hydrogen losses, increased load on the flare system and decreased calorific value of fuel gas in the industrial network.
In order to avoid HBG blowdown to the flare, it was decided to set the lines to transfer
HBG from GO-2 Unit of Shop No. 9 to Pressure Swing Adsorption (PSA) Unit of Shop No. 1. When implementing the scheme the existing pipelines were used, which made it possible to reduce the costs significantly. All works were completed in May 2022.
—PSA Unit allows to remove hydrogen, an individual component, from hydrogen-bearing gas and transfer it to the hydrotreatment units. Prior to this, HBG with high hydrogen content was blown down to the flare system, then transferred via Gas Compression and Fractionation Unit to the fuel system and finally burnt in the furnaces of the production units, — sums up Rail Abdrakhmanov, Chief Pre-production Specialist of the Production Department. — In general, the scheme made it possible to reduce the gas amount sent to the flare system, the load on the compressor equipment of Gas Compression and Fractionation Unit, the losses of the gas sent to the flare and the hydrogen losses.
In the near future, we are planning to implement a similar scheme to remove HBG, which is to be blown down, from L-16-1 Unit.
For reference:
Gazprom neftekhim Salavat is one of the largest oil refining and petrochemical complexes in Russia. The Complex was founded in 1948.
The Company is integrated into the Gazprom system. It has the basic advantage: consolidating on a single site a full cycle of crude hydrocarbons processing, petrochemistry and mineral fertilizers production. The Company comprises the Oil Refinery, Gas & Chemical Plant and the Monomer Plant.
Gazprom neftekhim Salavat produces more than 150 items, over 50% of which are bulk products including motor gasoline, diesel fuel, fuel oil, styrene, polystyrene, low density polyethylene, high density polyethylene, DOP plasticizer, butyl alcohols, sulphur, ammonia, urea, acrylic acid, butyl acrylate etc.
The products are shipped to all federal subjects of the country. Export supplies of oil products are mainly directed to European and CIS countries. Petro- and gas chemicals are exported to over 30 CIS and non-CIS countries and the largest volumes are shipped to Kazakhstan, Germany, Great Britain, the Netherlands, Poland, Belgium, Finland etc.
High quality of Gazprom neftekhim Salavat output is confirmed by certificates of conformity to ISO 9001 and 14001, the international standards of quality and environmental safety.
Enlarged photo (JPG, 478 KB)