Portable gasoline car particulate matter sampling device can be connected with commercial PM sampling instrument

Abstract

The invention discloses a portable gasoline car particulate matter sampling device can be connected with commercial PM sampling instrument. The portable gasoline car particulate matter sampling devicecan be connected with commercial PM sampling instrument comprises a tail gas thermal insulation connecting pipe used for thermal insulation of tail gas and introducing the tail gas into a dilution pipeline, a pure air intake pipeline used for filtering external air and introducing filtered external air into the dilution pipeline, the dilution pipeline used for mixing dilution of tail gas with thepure air, an air-discharging device which is arranged at the end of the dilution pipeline and is used for discharging the mixed gas in the dilution pipeline, a sampling pipeline which is provided with a sampling port in the middle back segment central axis of the dilution pipeline facing a gas flow coming direction and is provided with a tail end connected with a sampling head sealing cover; thesampling head sealing cover is provided with a space used for accommodating a commercial PM sampling instrument sampling head, is sealed, is capable of realizing sealing communication with the sampling pipeline and the commercial PM sampling instrument. The portable gasoline car particulate matter sampling device is capable of simulating particulate matter forming practical process and satisfyingconstant speed sampling requirements, is high in convenience, and is capable of satisfying on-site and large amount automobile sampling requirements.

Description

technical field [0001] The invention relates to a portable gasoline vehicle particulate matter sampling device, in particular to a portable gasoline vehicle particulate matter sampling device capable of connecting with a commercial PM sampler. Background technique [0002] The gaseous matter and particulate matter emitted by the engine are one of the main harmful pollutants in the environment. In order to control and treat atmospheric environmental pollution, the sampling and analysis of automobile exhaust are indispensable. At present, the sampling of pollutants emitted by automobiles is mainly based on gas, while the sampling of particulate matter is relatively lacking. Because the particulate matter emitted by automobiles has the characteristics of solid and liquid coexistence, and the temperature is high, its sampling is still difficult. Although large-scale laboratory samplers can accurately sample particulate matter, they are large in size, poor in portability, and hi...

AI Technical Summary

Problems solved by technology

Although large-scale laboratory samplers can accurately sample particulate matter, they are large in size, poor in portability, and high in cost, making it difficult to adapt to the needs of on-site and large-scale vehicle sampling, and some direct filter membrane sampling or similar devices are difficult to simulate the formation of particulate matter The actual process and isokinetic sampling requirements

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