Liquefied natural gas (LNG) contains a large amount of high-grade cold energy, which has a high economic value. With the current rapid growth of LNG users in China and the intensification of global energy supply constraints, the rational use of LNG cold energy is particularly important for energy conservation.
As China's demand for LNG increases, more LNG receiving stations will be built in coastal areas, where LNG will be gasified and delivered to users as urban residential gas, industrial fuel and chemical raw materials. In the process of LNG gasification, about 83k of low temperature energy is generated. Usually this cold energy is absorbed by the air or seawater through the gasifier, and the cold energy contained in it is not utilised, resulting in a huge waste of energy. If this cold energy is utilised. If this cold energy is used, huge energy savings can be made. From the perspective of energy conservation, it is important to actively seek and make efficient use of cold energy.
Natural gas is a high quality energy source. It has a high calorific value, is clean and has low combustion pollution. Its main component is methane, in order to facilitate the transport of its liquefied liquefaction temperature is generally in 150 ℃ to 161 ℃.
Dear Air Separation uses LNG cold energy in the form of liquid oxygen, liquid nitrogen and liquid argon. liquid air separation plant for liquid nitrogen and liquid argon. According to the principle of using low temperature cold energy as low as possible, liquid air separation plant is the most effective and reasonable way of using LNG cold energy.
