LNG Gas Station
ENDURANCE: Your Professional LNG Gas Station Supplier
Chongqing Endurance General Equipment Co.,Ltd is a comprehensive service company integrating manufacturing, installation and maintenance services. We mainly provide customers with energy equipment cleaning service. In addition, we also offer modern industrial greenhouse design and construction, equipment manufacturing and sales, engineering installation and testing services, such as CNG and LNG whole station design and manufacturing. The company's products are safe, stable and reliable in the use of gas station projects in Uzbekistan, Kazakhstan and other cities in China, and are well received by users!
Why Choose Us？
High Quality
Quality assurance is reliable, we have a complete machine test, it will test the reliability, functions, safety of the equipment. Our products are manufactured or executed to a very high standard, using the finest materials and manufacturing processes.
Professional Team
We have an excellent team that provides technology research and development, assembly manufacturing, and after-sales service. We collaborate and communicate effectively with each other, and are dedicated to delivering high quality results. We are capable of handling complex challenges and projects that require our specialized expertise and experience.
Advanced Equipment
Our machines, tools or instruments designed with advanced technology and functionality to perform highly specific tasks with greater precision, efficiency and reliability.
Perfect Service
ENDURANCE is available and dependable to provide support and solutions to customers at all times. We try and respond to all concerns within 24 hours and our teams are always at your disposal in case of any emergencies.
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![Daily 1 Million Cubic Meters Liquefaction Plant]()
Daily 1 Million Cubic Meters Liquefaction PlantA 1 million cubic meter liquefaction plant typically refers to a large liquefied natural gas (LNG) storage and production facility. This type of factory typically consists of multiple large...read more -
![Daily 500000 Cubic Meters Liquefaction Plant]()
Daily 500000 Cubic Meters Liquefaction PlantA 500000 cubic meter liquefaction plant is a large liquefied natural gas (LNG) production facility specifically designed to liquefy and store natural gas. This type of factory is usually located...read more -
![Daily300,000 Cubic Meters Liquefaction Plant]()
Daily300,000 Cubic Meters Liquefaction PlantA liquefaction plant is a production facility that processes natural gas through liquefaction. During this process, natural gas is compressed and cooled, ultimately converting into liquid form....read more -
![Daily 200,000 Cubic Meters Liquefaction Plant]()
Daily 200,000 Cubic Meters Liquefaction PlantA liquefaction plant is a production facility that processes natural gas through liquefaction. During this process, natural gas is compressed and cooled, ultimately converting into liquid form....read more -
![Daily 100,000 Cubic Meters Liquefaction Plant]()
Daily 100,000 Cubic Meters Liquefaction PlantA 100000 cubic meter liquefaction plant is a large-scale liquefied natural gas production facility designed to liquefy natural gas for storage, transportation, and sales. Liquefied natural gas is...read more -
![Daily 50,000 Cubic Meters Liquefaction Plant]()
Daily 50,000 Cubic Meters Liquefaction PlantThe 50000 cubic meter liquefaction plant is a factory specifically designed for the treatment of liquefied gas. The main task of a liquefaction factory is to liquefy natural gas, petroleum gas,...read more -
![Daily 33,000 Cubic Meters Liquefaction Plant]()
Daily 33,000 Cubic Meters Liquefaction PlantThe 33000 cubic meter liquefaction plant is a large liquefied gas production facility specifically designed to liquefy and store natural gas or other gases. The factory is usually equipped with...read more -
![LNG Cryogenic Pressure Vessel]()
LNG Cryogenic Pressure VesselInstallation of standard tanks and non-standard pressure vessels produced by Nike. Our prefabricated storage tank has a capacity of up to 250m3, whether vertical or horizontal, and can withstand...read more -
![LNG Storage Facility]()
LNG Storage FacilityNed is one of the few companies in China that has the ability to design and build large liquefied natural gas storage tanks. Ned can build storage tanks with a capacity of up to 50000 cubic...read more -
![Small-scale LNG Vaporization Skid]()
Small-scale LNG Vaporization SkidSmall liquefied natural gas vaporization sleds are designed specifically for regions with low natural gas consumption demand, such as: Rural or small towns, factories, residential areas,...read more -
![LNG Satellite Station]()
LNG Satellite StationLNG satellite stations are facilities that handle LNG transported from LNG storage terminals through gas tank trucks or trains. The system consists of LNG storage tanks, vaporizers, heat control...read more -
![Standard L-CNG Filling Station]()
Standard L-CNG Filling StationThe standard L-CNG refueling station provides CNG vehicles with filling and trade settlement services, and fills CNG vehicles with compressed natural gas from LNG in tank trucks through processes...read more
LNG gas stations are structurally similar to gasoline and diesel stations in that they have a storage tank, meters, and dispenser. Liquid natural gas (LNG) is stored in a cryogenic tank and then pumped directly to a dispenser for liquid delivery. Storing natural gas as a liquid instead of a gas greatly increases supply flexibility. Natural gas decreases about 600 times in volume when liquefied, which makes transport and storage much more efficient and cost-effective.
Features of High Flow LNG Dispenser
The LNG dispenser has high energy density. The natural gas contained in the same volume of LNG vehicle storage tanks is 2.5 times that of CNG cylinders. At present, large-scale LNG trucks in foreign countries can continuously travel 1000-1300 kilometers at one time, which is very suitable for long-distance transportation.
The construction cost and operating cost of the LNG dispenser are low. Compared with CNG refueling stations, LNG refueling stations do not require expensive multi-stage compressor units with a large floor area, which greatly reduces the initial investment and operating costs of the gas refueling stations. Compared with CNG filling stations, the one-time investment for LNG filling station construction is reduced by about 30%, and daily operation and maintenance costs are reduced by nearly 50%.
The construction of LNG dispensers is flexible and convenient. The main advantage of LNG refueling station is that it is free from the restriction of natural gas pipeline transmission network, and the construction of the station is more flexible, and the station can be built wherever it is needed.
The economic benefits of the LNG dispenser are significant. Because the price of LNG is lower than that of gasoline and diesel, and because LNG is completely burned, does not produce carbon deposits, does not dilute lubricating oil, it can effectively reduce the wear of parts and extend the life of automobile engines, so LNG has significant economic benefits.
Compared with LPG and CNG, the LNG dispenser also has the characteristics of high safety performance and low emission pollution.
Working Principle of High Flow LNG Dispenser
LNG from LNG tank enters into LNG dispenser through pipeline and flows through mass flow meter, cryogenic pneumatic valves, liquid flexible hose, LNG coupling nozzle, and is filled into LNG cylinder. Liquid Mass flow meter will meter parameters of gas such as density and mass.
Excess BOG gas inside LNG cylinder will be returned back to LNG station system through gas nozzle, gas flexible hose, gas phase mass flow meter (optional), cryogenic check valve, recycle piping. Gas phase mass flow meter will meter parameters of BOG gas such as density and mass.
Data from both flow meters will be transmitted to computer controller, and computer controller will deduct the amount metered by gas phase flow meter from the amount metered by liquid phase flow meter, and displays result to operators and consumers through LCD screen.
Computer controller will provide dynamic monitoring of the status of liquid phase flow meter. In case the liquid temperature, gas and liquid conditions, density etc cannot meet the filling requirement, the system will start pre-cooling automatically through recycling until it meets the filling requirements.
Precautions for the Use of Storage Tanks in High Flow LNG Dispensers
For storage tanks with double-root valves, the valve near the storage tank should be normally open.
When unloading the truck, it is recommended that the limit filling volume of the storage tank of the LNG dispenser is not more than 90% of the effective volume (the manufacturer gives it as 85%-95% of the geometric volume), and the use margin cannot be less than 10%.
When the pressure of the storage tank of the LNG dispenser is high, it is not necessarily a problem with the storage tank. The heat leakage and liquid storage time of the entire system should be considered. Generally, when the pressure exceeds 1.1 MPa, it is necessary to discharge and release the pressure. Long-term exposure to high pressure will affect the life of the interlayer vacuum of the storage tank.
When there is a lot of long-term "sweating" or frost in the storage tank of the LNG dispenser, and the pressure keeps rising rapidly, the vacuum failure should be considered, emergency treatment should be carried out, and the pressure in the tank should be manually discharged.
The storage tank of the LNG dispenser is recommended to conduct a vacuum test every other year. When the storage tank is a hot tank, the vacuum degree is less than 1Pa, and when the storage tank is a cold tank, the vacuum degree is less than 0.5Pa (0.00375TOF) as qualified.
The storage tank of the LNG dispenser cannot be transported with liquid, and the LNG liquid in the tank should be discharged when it is out of service for a long time.
The storage tank of the LNG dispenser is pressure vessel equipment.
- Better internal distribution and optimisation of resources: Cryogenic tanks are very versatile, allowing for the installation of a centralised network for the optimal distribution of the different cryogenic gases used. An important advantage of this type of tank is that there is no gas return to the plant, as is the case with other systems such as cylinders. It goes without saying that this translates into resources saved.
- Improved loading process: The loading of the gases into the cryogenic tanks is done using vaporisers. The major benefit of this system is that the liquid gas passes directly from the production plant to the user, avoiding sudden movements and improving stability and safety.
- Higher purity: The gas stored in cryogenic tanks maintains a higher level of purity than in other storage systems, as it always remains isolated in a hermetically sealed tank meaning that no possibility exists of contamination with any external agents.
- Increased safety: Risks are kept to a minimum, as the gas remains isolated in hermetically sealed, stable tanks with no contact with the outside world. Cylinder transfer within the facilities is avoided, avoiding unnecessary hazards.
Low Temperature Resistance
The boiling point of liquefied natural gas at normal pressure is -160°C. LNG chooses low-temperature and normal-pressure storage method, which reduces the temperature of natural gas below the boiling point, so that the operating pressure of the liquid storage tank is slightly higher than normal pressure. Compared with the high-pressure normal-temperature storage method, it can greatly reduce the thickness of the tank wall and improve safety performance. Therefore, LNG requires liquid storage tanks to have good low temperature resistance and excellent cold retention performance.
High Safety Requirements
As the tank stores low-temperature liquids, once an accident occurs in the storage tank, the refrigerated liquid will evaporate in a large amount, and the amount of vaporization is about 300 times that of the original refrigeration state, forming an air mass that will automatically detonate in the atmosphere. Therefore, API, BS and other specifications all require storage tanks to adopt a double-wall structure. Using the sealing concept, when the first layer of tank leaks, the second layer of tank can completely seal the leaking liquid and vapor to ensure storage safely.
Special Materials
The inner tank wall requires low temperature resistance, and 9Ni steel or aluminum alloy is generally used, and the outer tank wall is prestressed reinforced concrete.
Strict Insulation Measures
Since the temperature difference between the inside and outside of the tank can be as high as 200℃, to keep the temperature inside the tank at -160℃, the tank body must have good cold insulation performance, and high-performance cold insulation materials are filled between the inner tank and the outer tank. The cold insulation material at the bottom of the tank must have sufficient pressure-bearing performance.
Good Seismic Performance
Generally, the seismic requirements of buildings are to crack without falling under the specified earthquake load. To ensure the safety of storage tanks under accidental loads, storage tanks must have good seismic performance. For LNG storage tanks, it is required to not collapse or crack under the specified seismic load. For this reason, the selected construction site should generally avoid the earthquake fracture zone. Before construction, the storage tank should be subjected to seismic tests to analyze the structural performance of the storage tank under dynamic conditions to ensure that the tank body is not damaged under a given seismic intensity.
Strict Construction Requirements
Welds of storage tanks must be subjected to 100% magnetic particle testing (MT) and 100% vacuum tightness testing (VBT). It is necessary to strictly select cold insulation materials and follow the prescribed procedures during construction. In order to prevent the concrete from cracking, post-tensioned pre-stress construction is adopted, and the verticality of the tank wall is very strict.
The Maintenance and Inspection of Cryogenic LNG Tanks
- There’s a fair bit of legislation that governs the industry’s use of LNG cryogenic tanks. They have to be operated and maintained in a manner that’s in compliance of these regulations.
- Only designated competent persons are qualified to maintain and manage the LNG cryogenic tanks. The industry abides by these regulations. As such, static tanks should put through inspections at regular intervals. Routine maintenance and periodic formal examination should also carried out.
- The maintenance and inspection regime has to be created so that it can be ensured that the tank is in a position to allow safe operation at all periods of time between the formal examinations.
- Periodic inspection and testing is also required for transportable tanks and this can only be performed by an inspection body. These inspections and examinations have to be documented and the records have to be retained for the life of the tank.
- There’s a duty of care that the industry needs to abide by when they own use LNG cryogenic tanks. Responsible gas suppliers will only fill an LNG cryogenic tank once they are satisfied that it is safe to do so.
Working Process of LNG Liquefaction Plant
Pretreatment
Remove dust and slug (water and condensate) along with hydrogen sulfide (H2S) and mercury (Hg). These pollutants can cause corrosion and freezing problems, especially in aluminum heat exchangers.
Acid Gas Removal and Dehydration
Carbon dioxide (CO2) is absorbed and removed from natural gas with an amine absorber (acid gas removal or AGR) and remove water using an adsorbent. The removal of these impure substances prevents ice from forming during the subsequent liquefaction process.
Remove Heavy Hydrocarbons
Heavy hydrocarbons (C5+) are removed by fractionation before liquefaction. Natural gas is pre-cooled to about -31°F (-35°C) by propane.
Separation and Liquefaction
- Pre-cooled mixed refrigerant (MR) moving through a high-pressure separator separates into a vapor and liquid. Each stream is cooled further, fully liquefied, and sub-cooled in separate tube circuits in the main cryogenic heat exchanger (MCHE).
- The two sub-cooled MR streams are let down in pressure, 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.
- The pre-cooled natural gas moves through a separate tube circuit in the MCHE, causing it to liquefy and sub-cool to between -238°F (-150°C) to -260°F (-162°C).
- The LNG end flash at the outlet of the MCHE and in the receiving LNG storage tank, generates flash gas and boil-off gas to make up the fuel gas needed mainly by the propane and MR gas turbine driven compression cycles.
Large-Scale Capacity
A liquefaction plant with a capacity of 500,000 cubic meters can handle vast quantities of natural gas, meeting significant energy demands and ensuring a stable energy supply.
High-Tech Equipment
To liquefy and store natural gas, a plant of this scale requires sophisticated equipment such as liquefiers, storage facilities, and transportation systems. These devices are characterized by high efficiency and reliability to maintain the plant's stable operation.
Stringent Environmental Standards
Liquefied natural gas is a clean energy source with minimal pollutants during combustion. Therefore, a 500,000 cubic meter liquefaction plant must adhere to strict environmental regulations to minimize its environmental impact.
Automation
To enhance production efficiency and reduce costs, plants of this size typically employ highly automated processes, including automation control, monitoring, and alarm systems to ensure safe and efficient operations.
Safety Measures
Given the flammable and explosive nature of liquefied natural gas, safety is paramount in a 500,000 cubic meter liquefaction plant. This entails rigorous safety protocols, fire protection systems, and emergency plans to safeguard both the facility and its employees.
Strategic Location
These plants are often strategically positioned near natural gas production areas or transportation hubs to minimize transportation costs and enhance efficiency, thereby offering customers more convenient and reliable services.
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