Ethane plus and HHH process for NGL recovery

摘要: The present invention relates to methods for separating and recovering ethane, propane heavier components from a feed gas, e.g. raw natural gas or refinery petroleum plant stream petrochemical stream. These employ common new concept which is the use of turbo-expander shaft compressor generate reflux requirement cryogenic absorber distillation columns. power absorbed by always high enough so that generation specific compression through expander subsequent cooling, condensation sub-cooling can be easily maintained. allows higher pressure lower demethanizer/de-ethanizer column thus eliminating pump at bottom. ultimately results in residue utilities consumption. as such 99+% recovery NGL