HH-6200 Online VOCs Monitoring System

The HH-6200 online VOCs monitoring system consists of a sampling probe, heated pipeline, pretreatment unit, VOCs analyzer, and electrical control unit. During measurement, the pre-installed sampling pump in the cabinet extracts the sample, which passes through the sampling probe, high-temperature heated pipeline, and filter before entering the VOCs analyzer. The entire gas path is maintained at 120°C with heated tracing. The sample gas is drawn into the analyzer by the sampling pump. When the sample loop is filled, it first undergoes atmospheric equilibrium. Then, the internal ten-port valve of the analyzer switches, and the carrier gas (N2) pushes the sample into the chromatographic column. Different organic compounds in the sample gas are separated by the chromatographic column and reach the FID detector at different retention times (qualitative analysis). The higher the response of the FID detector, the higher the concentration of specific pollutants in the sample (quantitative analysis).

1. The sampling pipeline and flow-assisting components are constructed with inert materials to minimize sample adsorption, ensuring high data credibility.
2. The system features an automatic purging function that removes dust from the filter surface, extending the filter's service life.
3. The hydrogen generator is equipped with a built-in liquid level detector and pressure sensor, enabling automatic water replenishment, shutdown in case of water shortage, and automatic gas production cessation upon FID flameout. The entire system includes an FID flameout alarm function to ensure station safety.
4. The system interface directly displays the average pollutant concentration and hourly emissions from the previous hour, providing intuitive data for user reference.
5. Customization is available to measure total emissions (non-methane total hydrocarbons) while simultaneously monitoring characteristic pollutants based on user requirements.
6. Through precise control, the analyzer achieves accurate usage of small gas volumes for various gases. Except for the carrier gas, which uses high-purity bottled nitrogen, other auxiliary gases are supplied by gas generators, enabling long-term low-cost gas production and reducing operational and maintenance expenses.

The HH-6200 online VOCs monitoring system is compatible with multiple pretreatment technologies, enabling real-time monitoring of volatile organic compounds (including methane, non-methane total hydrocarbons, benzene series, etc.) in gases. It can also be expanded to monitor various other volatile components (such as alcohols, ketones, esters, aldehydes, and other organic compounds) according to customer requirements. The system consists of a pretreatment system, chromatographic main unit (FID), hydrogen generator, air purifier, human-machine interface, and other components. Depending on different monitoring requirements, it can be integrated with online monitoring equipment for temperature, pressure, flow, particulate matter, humidity, etc., forming a comprehensive system to meet the VOCs monitoring needs of various industries such as petrochemicals, pharmaceuticals, automotive manufacturing, furniture manufacturing, semiconductor manufacturing, printing, and spray painting.

The HH-6200 online VOCs monitoring system is widely applied in online monitoring of organized organic waste gas emissions in industries such as petrochemicals, printing, and spray painting, as well as in organic waste gas recovery and online monitoring before/after treatment.

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