| 摘要 |
<p>An natural gas processing plant allows for recovery of at least 98% of butane and heavier hydrocarbons, and about 60 to 80% of propane hydrocarbons from a rich feed gas stream with a single fractionator that operates at two different pressures, that receives a chilled gas from a turboexpander in the upper fractionator and a C5+ liquid in the lower section, while producing a C2- vapor stream in the lower section that is used as reflux to the upper section. Most typically, contemplated configurations and methods operate without the use of external refrigeration.</p> |
