HYDROCARBON GAS PREPARATION SYSTEM FOR SUPPLY TO THE DEMETHANIZER (OPTIONS) Russian patent published in 2023 - IPC B01D3/28 C10L3/10 F25J3/02 F25J3/08 

FIELD: oil and gas industry.

SUBSTANCE: auxiliary equipment for distillation towers used in the oil and gas industry. Two options of the hydrocarbon gas preparation system are proposed, which in both options includes separators 1-3, distillation tube 4 and reducing devices 5-7. In the second option, the system additionally includes fourth separator 8 and reducing device 9. During the operation of the first option, hydrocarbon gas is fed into separator 1, where it is separated into gas and the residue, which is reduced in device 5 and separated in separator 2 into the gas withdrawn from the system and the residue, which is fed into the upper part of demethanizer 10 along the first line from the bottom. The gas from the separator 1 is sent to distillation tube 4, in which, under reflux conditions, it is separated into gas and residue, which is reduced in device 6 and fed into the upper part of demethanizer 10 along the second line from the bottom. The gas from distillation tube 4 is sent to separator 3, where it is separated into the gas discharged from the system and the residue, which is fed into the upper part of demethanizer 10 through the third line from the bottom. According to the second option of the system operation, the residue from distillation tube 4 after device 6 is separated in separator 8 into the gas discharged from the system and the residue, which is fed into the upper part of demethanizer 10 through the second line from the bottom.

EFFECT: reduction of ethane losses with dry stripped gas and reduction of the diameter of the upper part of the demethanizer.

2 cl, 2 dwg, 2 ex