Portable diesel vehicle particle sampling apparatus capable of being connected with commercial PM sampler

Abstract

The invention discloses a portable diesel vehicle particle sampling apparatus capable of being connected with a commercial PM sampler. The sampling apparatus includes: an tail gas heat-preservation connection pipeline, which is used for maintaining temperature of tail gas and feeding the tail gas into a diluting pipeline; a pure air inlet pipeline, which can filter external air and feeds the air into the diluting pipeline after throttle; the diluting pipeline used for mixing and diluting the tail gas with air; an exhaust apparatus used for discharging the mixed gas in the diluting pipeline; asampling pipeline, which has a sampling inlet arranged on the central axis of the middle-back section of the diluting pipeline and is faced to the direction of an air flow, and a tail end connected toa sampling head sealing cover; the sampling head sealing cover, which has a space for accommodating a sampling head of the commercial PM sampler, is sealed relative to exterior, and can be communicated with the sampling pipeline and the commercial PM sampler in a sealing manner. The sampling apparatus can simulate the actual process of generation of particle matters, and satisfies demand of isokinetic sampling, is high in convenience, and can satisfy demand of in-site sampling for a large number of vehicles.

Description

technical field [0001] The invention relates to a portable diesel vehicle particulate matter sampling device, in particular to a portable diesel 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 high i...

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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