Online measurement device for VOCs (Volatile Organic Compounds) concentration

Abstract

The invention provides an online measurement device for VOCs (Volatile Organic Compounds) concentration. The device mainly consists of a measurement unit, a calculation unit, and a display and alarming unit, wherein the measurement unit is used for measuring the temperature of sample gas and the pressure of sampling gas before and after chemical reaction; the calculation unit is used for calculating the concentration of the sample gas according to data measured by a measurement center; and the display and alarming unit is used for displaying the concentration of the sample gas, and giving an alarm when the concentration of the sample gas exceeds a set threshold value. The online measurement device for VOCs concentration has the advantages of simple structure and large measurement range andis safe and reliable.

Description

technical field [0001] The invention relates to an online measuring device for measuring the concentration of volatile organic compounds (Volatile Organic Compounds, VOCs), and belongs to the technical field of concentration measurement of inflammable and explosive gases. Background technique [0002] VOCs refer to those organic chemical substances with a boiling point equal to or less than 250°C, generally derived from fuel combustion, building materials (such as wood-based panels, foam insulation materials), organic solvents, etc. With the rapid development of the economy, the sources of VOCs gas emissions are increasing, and the scale of VOCs emissions is also increasing year by year. It not only seriously threatens human health and induces human diseases; it also directly threatens the natural environment, leading to photochemical pollution. VOCs entering high altitudes can also react with ozone and damage the ozone layer. Therefore, the treatment of VOCs from concentra...

AI Technical Summary

Problems solved by technology

Both PID and FID detectors have experience in the development of VOCs concentration measurement in the factory environment or public environment. However, because the monitoring equipment based on the above two detectors requires complex pretreatment equipment and is inconvenient to operate, it is not suitable for use as industrial process control products. Useful for field workers

The maintenance cycle is short, and the working status of the sensor needs to be tested frequently. The sensor is fragile, and it is difficult to maintain a long life in the harsh production line.

In addition, the cost of the above two detectors is relatively high, and the maintenance cost is even more expensive

[0005] In summary, the PID and FID detector measurement methods have many technical shortcomings, and cannot conduct online continuous measurement of the combustible gas concentration in the VOCs centralized treatment pipeline. Not only is the cost high, but also the operation stability is poor.

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