With the rapid development of industrialization, the problem of air pollution is becoming more and more serious. Among them, non-methane total hydrocarbons (NMHCs) are one of the main air pollutants, and their emission control and monitoring have become an important part of environmental protection work. In order to achieve continuous monitoring of non-methane total hydrocarbons, related technical equipment is constantly being developed and improved. In this paper, we will focus on the basic principles, characteristics and precautions in the monitoring process of the continuous monitoring system for non-methane total hydrocarbons.
1. Basic principles of continuous monitoring system for non-methane total hydrocarbons.
The continuous monitoring system of non-methane total hydrocarbons is mainly based on chromatography technology, which realizes the continuous monitoring of non-methane total hydrocarbons through chromatographic analysis. The system mainly includes a sampling probe, a sample transfer line, a chromatography analyzer, and a data acquisition and processing unit.
1. Sampling probe: used to collect gas samples from the environment.
2. Sample transfer pipeline: transfer the gas sample collected by the sampling probe to the chromatography analyzer.
3. Chromatography analyzer: separate and analyze the gas samples transmitted to obtain the content of each component.
4. Data acquisition and processing unit: collect, process and store the data obtained by the chromatographic analyzer, and generate monitoring reports at the same time.
2. Characteristics of continuous monitoring system for non-methane total hydrocarbons.
1. Continuous monitoring: The continuous monitoring system of non-methane total hydrocarbons can realize the continuous monitoring of non-methane total hydrocarbons in the environment and grasp the pollution status in time.
2. High degree of automation: The system realizes the full automation of sampling, analysis, data acquisition and processing, and reduces human operation errors.
3. High sensitivity: The continuous monitoring system of non-methane total hydrocarbons has high sensitivity and can detect lower concentrations of non-methane total hydrocarbons.
4. Good stability: The components of the system are stable and reliable, which ensures the stability and accuracy of the monitoring data.
3. Precautions in the process of continuous monitoring of non-methane total hydrocarbons.
1. Periodic calibration: In order to ensure the accuracy and reliability of the monitoring data, the continuous monitoring system of non-methane total hydrocarbons needs to be calibrated regularly. It is generally recommended to perform a monthly calibration.
2. Maintenance: All components of the system need to be maintained regularly to ensure their normal operation. If any abnormalities are found, they should be dealt with in a timely manner.
3. Avoid interference: In the monitoring process, the influence of external interference on the monitoring results should be avoided as much as possible. If a source of interference is found, measures should be taken to eliminate the interference in a timely manner.
4. Data processing: The collected data needs to be processed and analyzed correctly in order to obtain accurate monitoring results. At the same time, corresponding monitoring reports should be generated according to actual needs.
IV. Conclusions. As an advanced monitoring technology, the continuous monitoring system of non-methane total hydrocarbons plays an important role in environmental protection. Through the introduction of the system, we can understand its basic principle, characteristics and precautions in the monitoring process. In practical application, the continuous monitoring system of non-methane total hydrocarbons will help to improve the level of environmental monitoring and provide strong support for environmental protection.