Portable sampling and measuring system for particles discharged by mobile pollution source, and method thereof

Abstract

The invention relates to a portable sampling and measuring system for particles discharged by a mobile pollution source, and a method thereof. The sampling and measuring system comprises an air compressor, a drier, a filter, a heater, a particle sampling and measuring module and a sampling probe. The outlet of the air compressor is connected with the inlet of the drier, and the outlet of the drieris connected with the inlet of the filter. The particle sampling and measuring module comprises a dilution module, an electric discharging module, a mixing module, a separating module and an electrometer. The system and the method have the advantages of overcoming of the disadvantages in the prior art, realization of sampling and measurement of high-temperature and high-concentration particles discharged by the mobile pollution source, and keeping of a stable dilution ratio.

Description

technical field [0001] The invention relates to the technical field of mobile pollution source environmental monitoring, in particular to a portable mobile pollution source emission particulate matter sampling and measurement system and method. Background technique [0002] Aerosols generated during combustion and other industrial processes typically have a wide range of properties. Particle concentration, temperature, and relative humidity vary greatly during the same process. The particle distribution changes with the characteristics of the aerosol, and phenomena such as flocculation, condensation, and nucleation occur during the sampling process. Extracting effective samples from such a process puts forward higher requirements on the applied sampling equipment. In order to obtain an effective result, the dilution rate, dilution temperature, and residence time must be strictly controlled. [0003] In response to the problem of particulate emissions from internal combu...

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Problems solved by technology

However, the full-flow dilution sampling system is large in volume, high in manufacturing cost, and high in use cost, so it cannot be used in vehicles.

Chinese patent CN100395533C discloses a fixed combustion source emission particulate matter dilution sampling system, using two-stage dilution, which separates the first-stage dilution and the second-stage dilution, which will not only increase the transmission loss of the pipeline but also increase the volume of the sampling system It is difficult to achieve portability. In addition, the secondary dilution only uses multiple injection holes, which will make the dilution air flow uneven and it is difficult to ensure the stability of the dilution ratio.

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