Crygogenic LNG Gasoline Pump LNG
LCNG Gas Refuelling Stationcryogenic liquid oxygen nitrogen argon
co2 lng pump workshopLNG LCNG Refueling Station: 25Mpa LNG Transer
Pump SkidOne. Introduction1.1The medium used in this process
system:Liquefied Natural
Gas(LNG) Design
Temperature:-196ºC Working Pressure:
before submersible pump ≤1.6MPa, after pump≤2.0MPa; L-CNG high
pressure pump before≤1.6MPa, after pump≤25MPa;1.2
Physical Parameters of LNG:Average Molecular Weight:17.3Main
Components:methane(CH4)~ 93.6 %,Ethane(C2H6)~4.12 %Vaporization
Temperature: -162.3ºC(atmospheric pressure)Liquid Density:~426
kg/m3 Gas Density:0.772 kg/Nm3 (15.5 ºC) Gas/Liquid Volume
Ratio:~625:1(15.5 ºC)Ignition Point:650 ºCRemarks:As the LNG varies
from place to place, the physical property parameters must be based
on the LNG supplier's.Two.LNG/L-CNG Filling Station Process
Flowchart Unloading Process: Transfer LNG(liquid natural
gas) from the tank truck to the LNG storage tank of the gas station
through the LNG submersible pump skid(including the unloading truck
and the tank booster) at the gas filling station.Pressurization
Process: After unloading, the LNG is pressurized to above 23Mpa by
the LNG high pressure pump skid, and then gasified into CNG(high
pressure natural gas)by the high pressure vaporizer skid(including
high pressure vaporizer, high pressure water bath electric heating
reheater, and sequence control panel), and enter the high pressure
gas cylinder group for storage.Gas Filling Process: When the
pressure in the high pressure gas cylinder group is too low to be
able to refill normally, the high pressure pump restarts and
vaporizes to replenish and pressurize the high pressure gas
cylinder group, and refill the car.Liquid Filling Process: LNG is
pressurized to about 1.6Mpa by the LNG submersible pump skid, and
LNG is filled into the car bottle group through the pipeline and
LNG dispenser.Three.The General Process Flow Chart is as
follows:LNG/L-CNG Refuel Gas Station Equipment: L-CNG High Pressure
Vaporizer Skid LNG/L-CNG Refuel Gas Station Equipment: LNG
Submerged Pump Skid LNG/L-CNG Refuel Gas Station
Control System LNG Dispenser Technical
Specification ItemSpecificationFlow Range3-80kg/minMax Working
Pressure1.6MPaWorking Temperature-30-+55ºCInlet Flow Meter Type1"
low temp mass flow meter E+H/EmersonMeasurement Accuracy±1%Minimum
Reading Graduation Value0.01kg or Nm3,LSingle Measurement
Range0-9999.99kg(or Nm3,L)Cumulative Measurement
Range0-99999999.99kg(or Nm3,L)Filling Hose1" stainless steel soft
pipe 4mReturn Air Hose1/2" stainless steel soft pipe 4mNetworking
InterfaceRS485(use photoelectric isolation 8KV ESD)Electrostatic
Discharge Immunity4class 8KVElectrical Fast Transient Pulse Group
Immunity4 class 4KVSurge Immunity4 class 4KVPower SupplyAC220V
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