overview
The fixed pollution source online monitoring system consists of a volatile organic compound monitoring subsystem, a flue gas parameter (temperature, pressure, flow rate, humidity, oxygen) monitoring subsystem, and a data acquisition and processing subsystem. A temperature pressure flow integrated monitoring instrument is installed on the chimney to measure the temperature, pressure, and flow rate of flue gas. At the same time, a sampling probe is installed for gas sampling. The sample gas is introduced into the main system inside the analysis cabin through a heat tracing pipeline for organic matter and humidity measurement. Install monitoring software in the main system to monitor and summarize temperature and pressure flow, gas concentration information, and working status information. At the same time, generate reports, store data, record historical data, and communicate with the enterprise testing center, website, LED display screen, and environmental protection department through networking. Meets the technical requirements of the VOCs online monitoring system for fixed pollution sources in China.
Design Principle
The overall design complies with the requirements of HJ 1012-2018 Technical Requirements and Testing Methods for Portable Monitoring Instruments for Total Hydrocarbons, Methane and Non Methane in Environmental Air and Waste Gas, with high accuracy and strong comparability.
Qualitative and quantitative monitoring of total hydrocarbons, methane/non methane total hydrocarbons in ambient air and pollution source exhaust gases using gas chromatography and hydrogen flame ionization methods.
Design Features
Stainless steel sampling pipeline reduces measurement errors caused by sample adsorption and avoids the risk of gas leakage after repeated heating and cooling of the fluorine tube.
The three-stage filtration design effectively captures particles such as dust, impurities, and crystals, avoiding damaging effects on the analysis system.
The total heat method design ensures no condensation from sampling to analysis, avoiding the attachment of high boiling point substances, improving measurement accuracy, slowing down component corrosion, and enhancing system reliability.
Strong detection capability, using hydrogen flame ionization detector (FID) instead of conventional photoionization detector (PID). Compared with PID, FID has more response factors, especially for alkane substances that PID cannot respond to, and has higher measurement accuracy, wider linear range, and stronger anti pollution ability.
L featured system design, which can use a set of analytical instruments to alternately detect samples before and after treatment, and report removal efficiency.
Customized vacuum acceleration design can effectively remove residual gas in the system, achieving stability in a single cycle. Within 5 minutes, testing of samples before and after treatment can be completed, and the removal efficiency can be reported.
Special software design, embedded with SMS warning module. In case of abnormal situations such as data exceeding the standard, relevant personnel such as environmental protection, enterprise, and operation and maintenance can be notified by SMS.
The design style is compact, with the characteristics of small size, light weight, and small footprint, which reduces installation difficulty and cost, and makes installation more flexible.
system configuration
The supporting equipment for the Mingqin GCD 9300 VOCs pollution source online monitoring instrument mainly includes sampling probes, heat tracing pipelines, temperature and pressure flow, zero gas generators, hydrogen generators, and other accessories.
TECHNICAL INDEX
The overall system uses intelligent software operation mode, integrating automation functions such as data display, parameter setting, automatic calibration of standard gas, self starting after power failure, and alarm prompts. The operation interface is simple and intuitive.
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