Nikkiso Clean Energy & Industrial Gases Group

Nitrogen Gas Generators (LGN & TGN)

Overview
Description
Specifications
Brochures

The LGN Series N2 Cryogenic Gas Generators can produce from 600 to 2500 Nm3/hr of high purity gaseous nitrogen by cryogenic distillation of ambient air. Our LGN Series nitrogen gas generators require a small supply of liquid nitrogen for process refrigeration and purification, eliminating the need for a turboexpander. These plants feature a compact, modular design, automatic process control designed for unattended operation, remote access and control, and easy access for maintenance tasks. The LGN Series consists of three modules: an Air Compressor Module (ACM) that provides the process air, a Warm Equipment Module (WEM) that purifies the process air, a Cold Box Module  (CBM) that houses the distillation equipment.

The LGN series plants produce high purity gaseous nitrogen (600 – 1000 Nm³/hr) by cryogenic distillation of atmospheric air. The generator is a liquid assist type and features a compact and modular design.

The plant utilizes an air compressor to provide feed air that operates above the gas Nitrogen delivery pressure.  A small amount of liquid Nitrogen is necessary to be added to the top tray of the distillation column to provide additional refrigeration required for the plant to make up for the cold box heat loss.

The plant layout is configured to provide maximum efficiency and ease of maintenance. The plant consists of three modules, an Air Compressor Module (ACM) that provides process air, a Warm Equipment Module (WEM) that purifies compressed air and a Cold Box Module (CBM) that houses the distillation equipment.

Our TGN Series Nitrogen Generators are designed to provide up to 5000 Nm3/hr of high quality gaseous nitrogen with cryogenic purity. This nitrogen generation plant is self-refrigerated, using an in-house designed and fabricated NIKKISO ACD Turboexpander to produce process refrigeration.  A small amount of liquid nitrogen is also produced to provide additional product for demands and backup. Like the LGN, the TGN Series consists of three modules: an Air Compressor Module (ACM), a Warm Equipment Module (WEM) and a Cold Box Module (CBM). Each of these three modules are pre-wired and pre-piped for ease of installation. Also like the LGN, the TGN Series features automatic process control for unattended operation, further simplifying operation.

The TGN series plants produce high gaseous nitrogen by cryogenic distillation of atmospheric air. In addition, they also produce a small amount of liquid nitrogen to store for peaking or back-up purposes. The TGN series plants are efficient, reliable, and compact.

The TGN series plant utilizes a waste gas expansion cycle using a Turboexpander to produce gaseous and liquid nitrogen. The layout is configured to provide maximum efficiency and ease of maintenance. The plant consists of three modules, an Air Compressor Module (ACM) that provides process air, a Warm Equipment Module (WEM) that purifies compressed air and a Cold Box Module (CBM) that houses the distillation equipment. These modules are pre-wired and pre-piped for ease of installation.

Both the LGN and TGN Series plants can be installed within a few days.

Features & Benefits

  • Automatic process control
  • Designed for unattended operation
  • Once the plant is started and running, the air separation process, purity control and all the subsystems external to cold box are fully automatic.
  • Nikkiso Cosmodyne PLC based control system provides efficient, user-friendly graphic interface for remote, local or unattended operation
  • Automatic control of all primary plant functions
  • State-of-the-art analytical instrumentation package
  • Dual, high performance turboexpanders with removable cartridge style rotating elements
  • Proven molecular sieve type air clean-up system
  • Closed Loop Evaporative Cooling System
  • 50 or 60 Hertz Electrical System
  • Product Storage Tanks
  • Cylinder Charging Systems
  • Liquid Transfer Pump Systems
  • Other customized features for site specific requirements

 

Applications

  • Emerging Markets
  • Remote Locations
  • Medical
  • Industrial
  • Oil Field
  • Military
  • Metal Processing
  • Glass
  • Food

Services

  • On-site or in-factory operator training
  • Installation and commissioning assistance
  • Extended warranty package
  • Service package
  • Aftermarket spare parts support
  • Aftermarket technical support

LGN & TGN Performance Table