Vapor Recovery Units (VRU)

A Vapor Recovery Unit (VRU) is a specialized compression package, which aims to lower emissions levels, while recovering valuable hydrocarbons to be sold or reused as fuel onsite. A package for vapor recovery can capture about 95% of Btu-rich vapors, generating many benefits, guaranteeing less air pollution, and recovering vapors to be used as fuel.

Garo is specialized in designing and engineering tank Vapor Recovery Systems, using liquid ring compressors as the means of compression.

Vapor Recovery Units for Tank Farms or Upstream Process Separators

When crude oil is stored in storage tanks, the vapor space above the liquid will become saturated with VOCs to reach equilibrium.  Changing liquid levels due to loading and unloading of the tank will cause changes in the vapor space.  As the tank is unloaded (drained) vapor must be added into the tank above the liquid to maintain a slightly positive pressure inside the tank to keep it from collapsing as the liquid is evacuated.  As the tank is loaded (filled) the vapor above the liquid must be removed to keep the tank from over pressuring and potentially rupturing.  Ambient temperature changes can also change the vapor pressure inside the tank above the liquid and can lead to venting of the VOC saturated vapor or to air ingress into the tank forming a potentially explosive atmosphere inside the tank.  The VOC containing vapor that is vented through boil-off (hot ambient days) or through loading operations can be recovered and compressed, instead of being released into the atmosphere.

 

Benefits of a VRU

  • Profitability & Reduced Operating Costs: Recovered vapors can be re-ejected in oil wells, sent to users, or used as fuel, resulting in revenue or cost reduction for the facility.
  • Social and Environmental Responsibility: Venting is eliminated and emissions of dangerous pollutants are reduced up to 95%. This demonstrates a commitment to social and environmental responsibility.
Vapor Recovery Unit - Garo Liquid Ring Compressor

Key Features

  • Rugged Design Construction - tolerant of occasional carryover of salt or organic materials
  • Low Maintenance Requirements
  • Cool Running Liquid Ring Technology - ideal for handling salty and sour gases
  • Simplified Process
  • Full automatic system for easy handling & controls of multiple units in operation
  • Global Technical Support & Service


Low Pressure Vapor Recovery

GARO Single-Stage Liquid Ring Compressor 

  • Pressure range: 1 up to 5 Bar A
  • Flow rate range: 1- 5000 Am3/hr per machine
  • Materials: Carbon Steel, Stainless Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, High Nickel-based Alloy
  • Sealing type: dual mechanical seals in back to back or tandem arrangement

High Pressure Vapor Recovery

GARO Two-Stage Liquid Ring Compressor 

  • Pressure range: 1 up to 13 Bar A
  • Flow rate range: 1- 4000 Am3/hr per single compressor
  • Materials: Carbon Steel, Stainless Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, High Nickel-based Alloy
  • Sealing type: dual mechanical seals in back to back or tandem arrangement