Dilution sampling device for flue gas under high-humidity condition and sampling method of dilution sampling device

Abstract

The invention relates to a dilution sampling device for flue gas under the high-humidity condition and a sampling method of the dilution sampling device. A PM10 whirlwind cutter, a first-level PM2.5 whirlwind cutter, a flue gas insulation and dehumidification device, a sampling airflow flowmeter, a first-level diluter, a second-level diluter, a second-level PM2.5 whirlwind cutter, a particulate filter, a flue gas mixing device, a flue gas flowmeter, a flue gas flow control valve and a sampling pump are connected in sequence, compressed air produced by an air compressor is divided into three paths through a compressed air buffering and processing device, one path is connected with the flue gas mixing device through a drying air flow control valve, a drying airflow flowmeter and the flue gasinsulation and dehumidification device, one path is connected with the first-level diluter through a first-level dilution airflow control valve and a first-level dilution airflow flowmeter, and one path is connected with the second-level diluter through a second-level dilution airflow control valve, a second-level dilution airflow flowmeter, the first-level diluter, and a second-level dilution airflow pressure gage. According to the dilution sampling device for the flue gas under the high-humidity condition, flue gas capturable particulate matters and condensable particulate matters under thehigh-humidity condition are sampled.

Description

technical field [0001] The invention relates to a high-humidity flue gas particle sampling system, in particular to a high-humidity flue gas dilution sampling device and a sampling method thereof. Background technique [0002] Sampling and detection of flue gas particulate matter can not only be used for research on the generation and control characteristics of flue gas pollutants, but also plays an important role in the analysis of particle properties, the impact of air pollution, and source apportionment, especially in the removal performance of particulate matter and source apportionment. The field has great application prospects. [0003] Particulate matter is divided into captureable particulate matter and condensable particulate matter. Condensable particulate matter refers to particulate matter that is in a gaseous state in the flue gas environment and is formed after entering the atmosphere and undergoing a dilution and cooling process. At present, domestic sampling...

AI Technical Summary

Problems solved by technology

However, the above sampling methods are all applicable to the sampling of particulate matter in conventional flue gas, such as the Chinese patent application number 201410810925.2. Sampling of particulate matter in air, the aerodynamic and filtration characteristics of particulate matter can be severely affected by saturated humidity conditions

For ultra-low emission retrofit projects, due to the extremely low concentration of particulate matter in the tail gas of wet desulfurization or wet electrostatic precipitator, errors in particulate matter sampling will seriously affect the final test results

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