The originator of SCV’s for vaporisation of LNG and the pioneer of many cryogenic fluid vaporisation applications, T-Thermal designed and supplied the very first submerged combustion system in 1965. Today, with our sister company, Selas Fluid, we have over 300 LNG vaporisers installed world wide for both peak shaving and base load applications.
Application
Selas Linde's vaporisers focus primarily on the heating and/or vaporisation of cryogenic and low temperature fluids. Though we have experience with oxygen, nitrogen, ethylene, ammonia, and propane, our vaporiser systems have most frequently been applied for vaporisation of LNG in base-load and peak-shaving regasification facilities.
LNG for Base and Peak Load Service
Liquefied natural gas, commonly called LNG, is easily transported overseas to receiving terminals and stored in insulated tanks before use. The liquid is then heated and converted to ordinary natural gas prior to direct transport to market. Selas Linde's vaporiser systems are used to vaporise LNG before transmission into natural gas pipelines to meet utility needs. For base-load service, operation of the vaporiser is the primary means of LNG vaporisation on a continuous basis. Typically, vaporisers for base load service utilize a large single burner to minimize emissions and have vaporisation capacities up to 200 t/h. In addition, SCV's can be installed and operated utilizing an available warm water supply either independently or to supplement the burner firing rate.
Design Principles
The submerged combustion vaporiser is an indirect fired heat exchanger with the burner and process tube coil contained within a single vessel. The design is based on the submerged exhaust principle whereby the burner combustion products are discharged into a water bath, which is used as the heat transfer media for vaporising the LNG in the tube coil.
Advantages
Since the first installation in 1965, over 300 units supplied worldwiede to date.
Average thermal efficiency over 99%
No ice build-up on tubes
Rapid start-up and shut down without process upset
No flame impingement on LNG coils
Fuel savings due to high thermal efficiency
Easily integrated with supplemental heat sources
Reference
Customer:
National Grid Grain LNG
Plant Location:
Isle Of Grain, Kent, UK
Capacity:
LNG Vaporisation capacity of 173 t/h
Additional Information:
Design with efficiency >99%
With integrated hot water cogeneration capability.
Scope of Work:
Design, Engineering, Procurement with Supervision of erection, commissioning, start-up and Training.
