Nitrogen separation column systems

A system for separating nitrogen from hydrocarbon streams, the system comprising:

• a distillation column comprising:
• an inlet configured to receive a hydrocarbon feed stream comprising nitrogen and at least 50 mol % hydrocarbons;
• and
• a plurality of trays or packed beds located below the inlet and configured to separate the hydrocarbon feed stream into vapor and liquid;
• and
• a heat exchange system coupled to a bottom end of the distillation column, wherein the heat exchange system comprises one or more heat exchangers configured to heat the liquid to separate liquefied natural gas from the liquid while simultaneously achieving mass transfer in the heat exchange system to produce a product.

A system for separating nitrogen from hydrocarbon streams, the system comprising:

• a housing comprising:
• an inlet configured to receive a hydrocarbon feed stream comprising nitrogen and at least 50 mol % hydrocarbons;
• and
• a separation section, wherein the inlet is configured to direct the hydrocarbon feed stream into the separation section, wherein the separation section is configured to separate the hydrocarbon feed stream into vapor and liquid;
• a first heat exchange system located at a top of the housing, wherein the first heat exchange system comprises one or more heat exchangers configured to cool the vapor to separate nitrogen from the vapor while simultaneously achieving mass transfer in the first heat exchange system to produce a first product;
• and
• a second heat exchange system located at a bottom of the housing, wherein the second heat exchange system comprises one or more heat exchangers configured to heat the liquid to separate liquefied natural gas from the liquid while simultaneously achieving mass transfer in the second heat exchange system to produce a second product.