Compressed Natural Gas Analyzer for Vehicles

Detailed standards on the necessity of gas quality testing at refueling stations:

I. Regulatory Requirements According to the national standard "Specifications for Compressed Natural Gas for Vehicles" GB18407-2022, there are clear gas quality requirements for vehicle natural gas. Refueling stations must comply with these regulations by conducting quality tests on incoming natural gas to ensure it meets national standards.  II. Natural Gas Composition and Characteristics Natural gas is a gaseous mixture primarily composed of methane, containing small amounts of alkanes such as ethane, propane, and butane, as well as impurities like carbon dioxide, oxygen, nitrogen, hydrogen sulfide, and moisture. If these impurities exceed standards, they can impact the safe operation of natural gas refueling stations. For example, when free water in natural gas is not completely removed, hydrogen sulfide in the accumulated water can easily cause cylinder corrosion, increasing safety risks.

II. Testing Content Gas quality testing at refueling stations mainly includes the following aspects:

1.Moisture Content Testing in Natural Gas: The moisture content in natural gas needs to be strictly controlled to avoid issues such as corrosion and icing caused by excessive moisture.

2.Oil Content: Oil contamination in natural gas also needs to be controlled, as excessive oil can affect the combustion efficiency of natural gas and the safe operation of equipment.

3.Impurities: Impurities in natural gas, such as particulate matter and dust, also need to be filtered and tested to ensure the natural gas entering the refueling station is clean.

4.Hydrogen Sulfide Content: Hydrogen sulfide is a toxic gas, and its content must be below the specified standard to avoid harm to human health and the environment.

III. Testing Methods and Equipment Refueling stations are typically equipped with online gas quality monitoring devices such as moisture analyzers and hydrogen sulfide online monitors to monitor various parameters of natural gas in real time. However, in practical applications, some refueling stations may fail to install or use these monitoring devices as required, which increases safety risks. Therefore, refueling stations should strengthen the maintenance and management of these devices to ensure their normal operation and accurate detection.

IV. Daily Management and Maintenance In addition to regular gas quality testing, refueling stations also need to strengthen daily management and maintenance of equipment. For example, regularly cleaning the inlet filter screens, maintaining compressors, and purging storage equipment. These measures help ensure the normal operation of equipment and the stable quality of natural gas. In summary, gas quality testing at refueling stations is one of the important measures to ensure the safe operation of natural gas refueling stations. Refueling stations should strictly comply with national regulations and standard requirements, conducting quality testing and control of incoming natural gas to ensure it meets national standards and customer needs.

Compressed Natural Gas Analyzer for VehiclesProduct Description:

The GC-7850 fully automatic gas calorific value analyzer is a high-performance instrument newly launched by Shanghai Xuansheng Scientific Instrument Co., Ltd. It is mainly used for detecting nitrogen, carbon dioxide, methane, ethane, propane, butane, pentane, and C6+ in LNG mixed with liquid LNG, and can calculate the gasification rate based on density.

The instrument features a stylish appearance and elegant design; equipped with a 12-inch display screen that shows rich and intuitive content; compact size, lightweight, and portable, making it suitable for both LNG user laboratory testing and analysis, as well as for gas companies to carry the instrument to multiple user sites for testing.

The instrument is very easy to operate, and even personnel who have never used such an instrument can learn it quickly. Insert the gas sample bag into the 'sample inlet' of the instrument, press "start," and the instrument runs automatically (automatic sampling, automatic analysis, automatic signal collection, no manual intervention required). The test results are automatically calculated within 10 minutes.