Decarburization and desulfurization purification system for wellhead natural gas rich in CO2 and H2S

• Main Authors: JING WUQI, FAN JINLONG, FU XIAOLIU, QIU LINJUN, FAN QINGHU, NIE CHENGXIN, ZHANG CHUNCHENG, WAN XIANLIANG
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2024
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING

The utility model relates to a decarburization and desulfurization purification system for wellhead natural gas rich in CO2 and H2S, which comprises a first-stage adsorption tower and a second-stage absorption tower which are connected in series, a first-stage regeneration tower and a second-stage regeneration tower which are connected in series, a dehydration drying device and a booster pump. The desorbed natural gas is treated by a dehydration drying device, the amine-rich liquid is subjected to flash evaporation treatment and then fed into a first-stage regeneration tower and a second-stage regeneration tower, CO2 and H2S are resolved by utilizing high-temperature steam to obtain a lean amine liquid, and the lean amine liquid is pressurized by a booster pump and then fed back to the first-stage adsorption tower and the second-stage absorption tower to be used as a desorption agent. According to the device, a double-tower adsorption regeneration purification process is adopted, the height of tower gas can b