Although industry standards and operating specifications such as ISO 15403:2000(E) stipulate the dew point of compressed natural gas in gas filling stations. However, the impact of moisture in natural gas systems is not always immediately apparent. Although the dew point of the pipeline system under online pressure may have reached -40°C, compression will increase the dew point of natural gas. When the pressure of natural gas rises, the dew point value also rises. Therefore, although when the natural gas in the pipeline system reaches the compressor, the dew point value is already very low, but when the natural gas passes through the compressor outlet, the dew point value will greatly increase. This requirement can be seen in the ISO 15403:2000(E) standard: Natural gas dryers must be installed in NGV filling stations, especially in areas where the temperature will drop in winter.

SP Solution:

1. Drying process: the raw material gas enters the dehydration device from the air inlet and removes solid impurities, liquid water and a small amount of hydrocarbons through the pre-filter, and then passes through the adsorption bed to remove the gaseous water to meet the requirements of the finished product. Finally, the particulate dust is removed through the post filter and leaves the dehydration device through the air outlet. At this point, the processed high-quality, dry and clean product gas enters the downstream equipment (compressor).

2. Regeneration process: Electric heating closed-cycle zero-emission regeneration process is adopted. That is, the medium heated to about 200°C in the regeneration system is pressurized by the circulating fan, and the adsorption bed layer is desorbed and analyzed. The desorption medium with high water content discharges the desorbed water to the storage tank through cooling and separation, and the dry desorption medium enters the circulating fan to perform desorption analysis and regeneration on the adsorption bed again and again.

SP  Advantages:

ØIt is widely used in all aspects of natural gas extraction, transportation, and gas filling.

ØThe filtration efficiency is as high as 99.99%.

Ø The equipment is fully automatic and easy to maintain.