Online monitoring system for volatile organic compounds

A. Instrument principle

The instrument adopts a dedicated chromatographic column combination, center cutting and blowback technology, and hydrogen flame ionization detector(FID)The combined technology is used for the detection of total hydrocarbons, methane, and benzene derivatives, and the samples are kept warm throughout the entire process180After filtering and collecting the quantitative ring at ℃, switch the injection valve and separate the samples into the chromatographic column under the drive of the carrier gas. Among them, the total hydrocarbons of the road enterFIDDetected in the detector that the second sample gas and methane are fromPQSeparation in chromatographic column, entering5AIn the chromatographic column, after switching the valve position, hydrocarbons are blown back and methane entersFIDDetected by the detector. The third sample of benzene, toluene, xylene, ethylbenzene, etc. is separated in a capillary column and entersFIDThe detector detected that after switching the valve position, the heavy hydrocarbon components were blown back and vented.

B. Instrument features

Adopting center cutting and back blowing technology;

Using a dedicated chromatographic column combination, with no residue and high sensitivity;

The instrument has a power on self-test function, gas cut-off protection function, automatic restart function upon power failure, and alarm function to ensure system safety and stability;

Using automatic electronic flow control technology（EPC）Control carrier gas, air, and hydrogen with high precision（0.01psi）Good repeatability and reproducibility;

Full process high-temperature heat tracing sample transmission, high temperatureFIDDetect and avoid high boiling pointsVOCsAdsorption and condensation, more accurate measurement;

Continuous operation without maintenance design, automatic cycle operation upon startup, truly online analysis;

L Full process flow path insulation design, no water condensation, avoiding component corrosion and degradation, suitable for high temperatures/high humidity/Corrosive working conditions;

monitoring parameters

Total hydrocarbons, methane, benzene, toluene, xylene, meta xylene, para xylene, isopropylbenzene, etc

Scope of application

Online monitoring of organized organic waste gas emissions from industries such as petrochemicals, printing, and spraying

Before organic waste gas recovery and treatment/Post online monitoring

Online monitoring at the factory boundary

Technical Specifications