Low-BTU Gas Streams
Low Inlet Nitrogen Content Gas Streams
Historically, solutions for gas streams that were just out of pipeline specification with regard to nitrogen content (3-10% nitrogen) included:
• Pay a penalty for off-spec gas;
• Blend gas to spec, if blend gas is available;
• If associated with an NGL extraction facility, ethane may be blended with sales gas to meet the inert specification.
Today, we deliver economic solutions for processing low nitrogen gas streams:
• As a stand-alone system behind the expander plant;
• As an integrated part of the existing expander plant.
Project Reference
PROJECT SPECIFICATIONS
Plant Location: Paden, OK, USA
Facility Size: 480 million m³ per year
Gas Source: Conventional low-BTU gas
Plant Type: NitechTM NRU
Inlet Gas: 6 - 9% N2
Project Type: EP plus fabrication of the NRU cold boxes
Completion: May 2008
PROJECT DESCRIPTION
An existing facility with NGL and condensate extraction, the NitechTM NRU is located in Paden, OK, east of Oklahoma City. For this particular facility, condensate, NGL, carbon dioxide and water are removed upstream of the NRU. In November, 2006, a NitechTM NRU to remove nitrogen from a slip stream of facility gas has been designed and constructed. Implementing the NitechTM NRU design allowed the client to more economically market their natural gas product. The Paden NRU utilizes the NitechTM NRU technology in order to reduce the nitrogen levels below the pipeline requirements. The facility was designed to process a portion of the total volume of available higher nitrogen gas to less than 1.0 mole % nitrogen, then blending this low nitrogen stream with the remaining higher nitrogen gas that bypasses the NRU. The total blnded stream meets the pipeline specification of 3.0 mole % nitrogen. By bypassing a substantial amount of gas, the capital cost and operating costs were reduced. Additional equipment purchased and installed included an amine unit and associated compression. BCCK assisted the client with specification of the amine unit and compressors. NG Resources completed the fabrication of the NRU cold boxes. The NRU was installed at the Paden Facility by a third party construction company and continues to operate today.
