Daily 1 Million Cubic Meters Liquefaction Plant

A 1 million cubic meter liquefaction plant typically refers to a large facility for storing and producing liquefied natural gas (LNG). This type of facility typically includes multiple large storage tanks, liquefaction production lines, gas processing equipment, and other auxiliary facilities. Its purpose is to liquefy natural gas for storage, transportation, and sale.

Large-Scale Capacity: A liquefaction plant with a capacity of 1 million cubic meters is usually substantial, capable of storing a large volume of natural gas to meet regional or global demand.

Advanced Technology: These facilities typically employ advanced liquefaction technology to efficiently and safely liquefy natural gas. Additionally, they are equipped with advanced monitoring and safety systems to ensure the production process's safety and stability.

Environmental Friendliness: Natural gas is a clean energy source, producing fewer pollutants when combusted. Therefore, a 1 million cubic meter liquefaction plant usually incorporates environmental protection measures during production to minimize its environmental impact.

High Economic Benefits: Due to the relatively low storage and transportation costs associated with natural gas, a 1 million cubic meter liquefaction plant often yields high economic returns. Furthermore, with the global energy structure evolving, the market demand for natural gas as a clean and efficient energy source continues to rise.

Karamay, Xinjiang 100 × 10⁴Nm ³/ D

Xinjiang Xinjie 100 × 10⁴Nm ³/ D 

Chongqing Qijiang 100 × 10⁴Nm ³/ D

Pretreatment

Dust, slug (water and condensate), hydrogen sulfide (H2S), and mercury (Hg) are removed. These pollutants can cause corrosion and freezing issues, particularly in aluminum heat exchangers.

Acid Gas Removal and Dehydration

Carbon dioxide (CO2) is absorbed and removed from natural gas using an amine absorber (acid gas removal or AGR), and water is removed using an adsorbent. Removing these impurities prevents ice formation during the subsequent liquefaction process.

Removal of Heavy Hydrocarbons

Heavy hydrocarbons (C5+) are fractionated and removed before liquefaction. Natural gas is pre-cooled to approximately -31°F (-35°C) using propane.

Separation and Liquefaction

1. Pre-cooled mixed refrigerant (MR) passing through a high-pressure separator separates into vapor and liquid. Each stream is further cooled, fully liquefied, and sub-cooled in separate tube circuits in the main cryogenic heat exchanger (MCHE).
2. The two sub-cooled MR streams are depressurized, further reducing their temperatures. As the mixed refrigerant vaporizes and flows downward on the shell side of the MCHE, it provides refrigeration for liquefying and sub-cooling the natural gas.
3. The pre-cooled natural gas passes through a separate tube circuit in the MCHE, causing it to liquefy and sub-cool to between -238°F (-150°C) and -260°F (-162°C).
4. The LNG produced flashes at the outlet of the MCHE and in the receiving LNG storage tank, generating flash gas and boil-off gas to fuel mainly the propane and MR gas turbine-driven compression cycles.

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