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The future of the liquid air separation plant cold energy industry

The future of the liquid air separation plant cold energy industry
Oct 31, 2025
Author: DEAR AST

Traditional LNG receiving stations use seawater open-frame vaporisers or submerged combustion vaporisers to vaporise LNG, which not only wastes valuable cold energy but also produces localised low temperature pollution of the nearby sea. The air separation temperature range is between -190C - 150C and the LNG vaporisation temperature is -162C, which matches the liquid air separation plant temperature range. The use of LNG's high quality low temperature cold energy for liquid air separation plant can significantly reduce energy consumption according to the temperature zone gradient, which is part of the energy saving and resource reduction advocated by the state.

Dear air separation's latest generation of intelligent liquid air separation plant combined with Dear air separation has the advantage of energy-saving technology, compared with traditional liquid air separation plant energy consumption can be reduced by an average of 15%, saving customers tens of millions of dollars per year.

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The non-power consuming option for liquid air separation plants can be used for full liquid air separation plants,where the produced liquid is sold off. This approach is currently available for most LNG receiving stations. For air separation units with a large cold capacity, the liquid air can be pressurised to 6baA in a vacuum storage tank, and then heat exchanged through a heat exchanger, instead of the air compressor, directly into the cold box for distillation. At the same time in the cold b...
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1. Before connecting the pipe orifice of each container, clean white cloth shall be used to tie the orifice to prevent grease and dirt from entering. 2. When welding in the cold box and in the condensing evaporator, it is strictly forbidden for flame or arc to touch the surface of vessels and pipes. 3. The containers, valves, pipes and corresponding supports in the cold box, the surface of the cold box and the foundation surface shall not be stained with grease after installation, otherwise, degreasing treatment shall be carried out.
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