The dehydration device of CNG filling station is a device used to remove water from natural gas. Its main function is to ensure that the water content of natural gas is controlled within a reasonable range during the CNG filling process. Natural gas with too much water will not only affect the gas quality, but also may cause equipment corrosion, freezing and other problems. Therefore, the dehydration device is very critical in CNG filling stations.
Function and Importance:
Remove moisture
Natural gas usually contains a certain amount of moisture, which can cause problems in high-pressure gas systems, such as corrosion of pipes and valves, and even freezing under low temperature conditions, leading to equipment failure. The CNG dehydration unit can remove this moisture to ensure the quality of natural gas.
Ensure gas quality
Excessive moisture may affect the combustion efficiency of the gas, produce incomplete combustion, and affect the effective use of energy. Through dehydration, the calorific value and combustion efficiency of natural gas are guaranteed.
Extend equipment life
Dehydrated natural gas will not cause corrosion or blockage to the equipment of the gas station, thereby reducing the frequency of equipment maintenance and extending the service life of the equipment.
Working principle:
Physical dehydration
The water vapor in natural gas is condensed into liquid water by cooling or temperature reduction. Freezing dehydration is a common physical dehydration method. Usually, a refrigerator is used to cool natural gas to a low temperature, so that the water vapor is condensed and separated from the gas.
Adsorption dehydration
Adsorbent materials (such as molecular sieves) are used to adsorb water in natural gas. This method is common and efficient, and is suitable for CNG filling stations with different gas sources and different pressure conditions. The adsorption method has a good dehydration effect, especially at lower temperatures and pressures.
Chemical dehydration
Use chemical desiccant (such as calcium chloride, etc.) to absorb water in natural gas. This method is often used to deal with situations where the water content in natural gas is high, and can effectively remove water from the gas.
Features and Advantages：
Efficient Dehydration
CNG natural gas dehydration device can efficiently remove moisture from natural gas, ensure that natural gas is free of moisture during the refueling process, and improve combustion efficiency and safety.
Automation Control
Modern CNG filling station dehydration devices are usually equipped with automatic control systems, which can monitor the moisture content in the gas in real time and automatically adjust the working state to ensure that the dehydration effect is always at the best level.
Energy Saving and Environmental Protection
Modern dehydration technology mostly uses energy-saving equipment to reduce energy consumption and reduce the impact on the environment.
High Reliability
The stability and reliability of the dehydration device are crucial to the normal operation of the gas station. Excellent dehydration devices can ensure long-term efficient operation and reduce equipment maintenance and failure rate.
CNG filling station dehydration equipment is one of the key equipment to ensure the quality of compressed natural gas and improve the operating efficiency of the filling station. Whether through freezing, adsorption or chemical methods, the dehydration device is an essential facility to ensure the stable and reliable operation of the CNG filling station.