Multifunctional atmospheric sampling system and method

Abstract

The invention relates to a multifunctional atmospheric sampling system and method, and belongs to the technical field of environmental monitoring. The atmospheric sampling system comprises a samplinghead, a sampling pipe, an exhaust fan, a sampling system controller and an analyzer, wherein the sampling pipe comprises an outdoor pipe and an indoor pipe, the indoor pipe is provided with a heatingand heat preservation device and a sampling interface, and is provided with a pressure sensor, a temperature sensor, a humidity sensor and a flow velocity sensor; the sampling system controller is provided with a signal acquisition unit and a micro-processing control unit, and the micro-processing control unit comprises a sampling control unit; the sensors are respectively connected with the signal acquisition unit and the micro-processing control unit, and the sampling control unit is connected with the heating device, the exhaust fan and the analyzer. The sampling system provided by the invention can effectively improve the sampling efficiency and the monitoring data quality, and meets the requirements of atmospheric environment monitoring.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and relates to a multifunctional air sampling system and an air sampling method. Background technique [0002] In recent years, with the enhancement of the country's economic strength, the comprehensive and rapid development of scientific and technological productivity, and the continuous development of the automatic monitoring system of ambient air quality, there are more and more automatic monitoring stations for ambient air. The atmospheric sampling system of the ambient air automatic monitoring station is mainly composed of sampling devices and testing instruments. The sampling device introduces air from the outside to complete the collection of ambient air samples, and then uses the testing instruments to detect and analyze the collected air samples. like figure 1 As shown, the structure of the current atmospheric sampling system is relatively simple. The sampling device is...

AI Technical Summary

Problems solved by technology

[0004] 1. The existing sampling system cannot monitor and dynamically control parameters such as humidity, temperature, pressure, and flow rate of the air sample gas in the sampling main pipe, especially in weather conditions such as large internal and external temperature differences and high humidity, which may easily affect the accuracy of monitoring data, such as causing The low monitoring values ​​of VOCs and O3 gas will easily affect the data quality;

[0005] 2. The existing sampling system cannot realize the whole system calibration, mainly because the existing sampling main pipe cannot realize the air tightness inspection function; the poor air tightness of the sampling system will cause the collected gas to be impure and mixed with indoor gas, so that it cannot be guaranteed Accuracy of monitoring data;

[0006] 3. The internal material of the sampling main pipe of the existing sampling system is generally the commonly used Teflon material, the heating effect is slow, and dynamic control of heating cannot be realized

[0007] 4. The existing sampling main pipe is generally 3-5 meters long. After long-term operation, pollutants will adhere to the inner wall. It is not convenient to disassemble the sampling main pipe for each cleaning and maintenance.

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