On-line aerosol carbon component collecting analyser

Abstract

The invention relates to an on-line aerosol carbon component collecting analyser. The analyser is characterized by comprising two parts, namely a carrier gas circuit system and a sampling-analyzing gas circuit system, wherein the carrier gas circuit system comprises a He gas circuit, a He-purge gas circuit, a He/Ox gas circuit and a He/CH4 gas circuit; and the sampling-analyzing gas circuit system comprises a sampling gas circuit, an analyzing-oxidizing furnace and an analyzing gas circuit. The on-line aerosol carbon component collecting analyser can continuously collect an atmospheric aerosol sample on line, chooses or automatically sets a temperature rise program according to needs and analyzes carbon components in the atmospheric aerosol by using a laser transmission method and a correction method. Besides, the on-line aerosol carbon component collecting analyser has the advantages of strong practicability, low running cost, convenient management, suitability for laboratory researches and environment-protection automatic monitoring stations all over China and capability of acquiring realer and more accurate carbon component data of the atmospheric aerosol.

Description

technical field [0001] The invention relates to an environmental quality monitoring instrument, in particular to an online aerosol carbonaceous component collection and analysis instrument. Background technique [0002] Carbonaceous components in atmospheric aerosols usually account for 10-70% of the mass concentration of atmospheric fine particles, and are an important component of atmospheric fine particles. It can be divided into three categories: organic carbon (Organic Carbon, OC), elemental carbon (Elemental Carbon, EC) and carbonic acid carbon (Carbonate Carbon, CC). OC mainly comes from the emissions of the primary combustion process and biological emissions, as well as the products that enter the particulate state after the chemical reaction between volatile organic compounds in the atmosphere and oxidizing substances in the atmosphere. EC, also known as carbon black (Black Carbon, BC), mainly comes from the incomplete combustion of carbon-containing fuels. CC mai...

AI Technical Summary

Problems solved by technology

However, the Sunset OC / EC analyzer still has the following problems in practical application: 1. The H-type quartz heating furnace of Sunset is prone to breakage during maintenance operations such as replacing catalysts and furnace wires, and cannot continue to be used

2. In the process of analyzing samples, Sunset uses too much cylinder gas, especially a large amount of internal standard gas He / CH 4 Empty directly without being utilized

3. During the heating process, because there is a certain distance between the thermocouple and the quartz membrane, the quartz membrane cannot be directly contacted, so the collected temperature data does not reflect the real information on the quartz membrane

4. The control software of the Sunset OC / EC analyzer cannot change the parameters of the analysis method in time according to the needs of the user, and the numerical calculation software lacks the processing of standard data, so that the user can only obtain the parameters of the standard curve through other calculation tools for numerical calibration

5. Since the air pollution in my country is different from that in foreign countries, and the composition and properties of atmospheric aerosols are also different, it is inappropriate to use instruments and method parameters developed abroad to study the pollution status of atmospheric aerosols in my country, and The high cost of Sunset online OC / EC analyzer makes it difficult to promote and apply it in China

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