Sampling device and determination method of total particulate matters in exhaust gas

Abstract

The invention relates to a sampling device and a determination method of total particulate matters in exhaust gas. The sampling device comprises a combined heating and sampling gun, a glue gas condenser, a flue gas buffer, a CPM-F filter membrane clamp, a flue gas drier, a flow sensor, a flow automatic tracking and adjusting device and an exhaust device which are successively connected through a connecting pipeline. The sampling device and the determination method provided by the invention are suitable for determining total particulate matters in high humidity exhaust gas in a low concentration FPM emission level and can accurately evaluate the actual emission level of the particulate matters in the high humidity exhaust gas, in particular, the emission condition of fine particulate matters.

Description

technical field [0001] The invention belongs to the field of environmental monitoring, and in particular relates to a sampling device and a measuring method for total particulate matter in waste gas. Background technique [0002] In recent years, the regional complex pollution characterized by atmospheric particulate matter has become increasingly serious, and the problem of atmospheric environmental pollution has attracted unprecedented public attention. Some studies believe that coal-based thermal power generation and industrial boilers are one of the main causes of regional compound pollution, which has attracted extensive attention from scholars at home and abroad on the emission of fine particulate matter from combustion sources. Through the actual measurement and analysis of the particulate matter emission level and emission characteristics of typical fixed pollution sources, the influence of different fuel boilers and different flue gas purification measures on the em...

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Problems solved by technology

[0003] my country's existing monitoring methods for particulate matter in exhaust from stationary pollution sources refer to "Determination of particulate matter in exhaust from stationary pollution sources and sampling methods for gaseous pollutants" (GB / T 16157-1996), as well as the upcoming national standard "Evaluation of low-concentration particulate matter in exhaust gas from stationary pollution sources". Gravimetric Method", these two standards can only collect FPM, neither of which can collect CPM, thus seriously underestimating the actual emission level of particulate matter emitted from high-humidity exhaust gas into the atmosphere

[0004] These two standards preliminarily measure the moisture content of the flue gas before formal sampling, which cannot fully reflect the actual moisture content of the flue gas during the test period, and there are certain errors

In addition, GB / T16157 uses a filter cartridge when sampling, and the loss of debris caused by the loading and unloading of the filter causes the FPM test error

[0005] In the prior art, the FPM particles deposited in the sampling nozzle and the front section of the sampling tube (the front end of the filter membrane) are not recovered, resulting in errors in the FPM test results; after the CPM-F filter membrane clamp, other water-soluble particles in the flue gas are absorbed with ultrapure water. As a part of CPM, the active component expands the measurement range of CPM, resulting in high CPM test results

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