LNG Plant

Here's information about " LNG Plant". If you have any doubts, please contact me .

 +86-022-87890750
 +8618602695112


This unit is applicable to wellhead natural gas pretreatment, including dehydration, hydrocarbon recovery, compression, storage transportation and pressure regulation project, meeting the requirement of skid mounted vehicular design, manufacture, and simple, flexible loading and installation at the well site.
Natural Gas Processing Plant - another step in gas processing is to remove the NGL from a gas stream. To remove the NGLs, the gas is cooled until the NGL condenses.


Supply scope of LNG Plant

Technical process of LNG plant covers pretreatment (purification), liquefaction, storage, loading and auxiliary system etc. Main processes are feed gas purification and liquefaction.
Feed gas purification process will be based on conditions of gas source, including filtration, heavy hydrocarbon desorption, acid gas desorption, dehydration, demercuation,etc.
Options of liquefaction process are natural gas throttling, nitrogen, azoxymenthane expansion natural gas expansion, multistep refrigerating cycle, MRC refrigeration, dimethylmethane precooling+MRC refrigeration etc.
LNG filling station is exclusively designed to provide fueling infrastructure for LNG vehicles or vessels, and can fulfill unloading, storage, metering etc.

Process of LNG Plant

After compression, the feed gas is processed by dehydration and heavy hydrocarbon separation units. Please see the attached PFD. Process description is detailed as follows:
  • Feed gas compress unit
After measuring, the feed gas flows into the compress unit, and boosts the pressure to 2.4Mpag, pressurized gas flows into the dehydration unit.

  • Dehydration unit
Pressurized gas flows into the dehydration unit. Dehydration unit adopts isobaric drying process, and consists of dehydrating tower, regenerator heater, regenerator cooler, regenerator gas liquid separator and dry air filter.
After pressurization, the feed gas is divided into two steams by flow regulator. 25% of one steam is used as regeneration gas, after regeneration work, flows back to the entrance and merges with the rest 75%, flows into the dehydrating tower.
Isotonic drying process flow is as follows (take dehydrating tower A as example):
Gas accounting for 75% of the total feed gas flows by sequencing valve directly to dehydrating tower A, moisture in the gas is adsorbed by the adsorbent in the dehydration tower, while the gas not adsorbed completes purification, through sequencing valve goes into the dust filter (to prevent adsorbent dust going into the de-mercury column). When the adsorbed impurities mass transfer front edge (called adsorption front) arrives at outlet reserved section, turns off the dehydrating tower A inlet valve A and purify air outlet valve, stops the adsorption. The adsorption bed turns into the regeneration process. When dehydrating tower A is in state of purification, the other two dehydrating towers B and C are in the regeneration process (one in hot wind state, the other in the cold wind state).



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