LNG

The Kiekens LNG Multiple Nozzle Spray (MNS) and Quench desuperheaters are typically designed and applied to LNG receiving, storage and re-gasification terminals. Two main Boil-Off Gas (BOG) desuperheating applications can be distinguished. Explore the advantages now!

Desuperheaters for LNG Terminals

Kiekens LNG (Cryogenic) Desuperheaters

The Kiekens LNG Multiple Nozzle Spray (MNS) and Quench desuperheaters are typically designed and applied to LNG receiving, storage and re-gasification terminals. Two main Boil-Off Gas (BOG) desuperheating applications can be distinguished

1. Vapor return to LNG carrier system

During unloading of the offshore LNG carrier, the BOG from the onshore LNG storage tanks is sent back tothe carrier via the BOG vapor return line. The BOGfills the void being created in the LNG carrier tanks, thereby preventing tank collapse. The LNG desuperheater reduces and controls the BOG temperature by direct injection of LNG, ensuring undisturbed and safe discharge of the LNG carrier.

2. Re-liquefaction system

The basic principle of the re-liquefaction system is to cool, and re-liquefy the BOG from the storage tanks. The LNG desuperheater, being part of this system- also known as the vapor handling system – plays a vital role in reducing the BOG compressor suction temperature. After the BOG cooling and compression stage, the BOG is re-liquefied in the BOG re- condenser and send back to the storage tanks.

Kiekens-DSH offers two types of LNG desuperheaters:

  • MNS type with integrated liquid control valve for handling large liquid side turn down ratios;
  • Quench type using a separate liquid control valve for handlingmoderate liquid side turn down ratios.

 

The main features of the Kiekens LNG desuperheater are:

  • Single point of injection and fine atomization of cooling liquid;
  • Accurate and stable reduction of BOG temperature;
  • Large liquid side turn-down ratios possible;
  • No static mixer device is required downstream the desuperheater;
  • Body Material in SS316 or SS304;

Enlarged body for MNS type desuperheater to protect actuator/positioner from low temperature.

Other applications

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