Retractable closed sweep-off resuspension smoke chamber and its detection method

Abstract

The invention provides a stretchable closed sweeping resuspension smog box, comprising a body and a sealed cavity (2); the sealed cavity (2) is embedded into the body; the stretchable closed sweepingresuspension smog box further comprises an operation window (5) and an observation window (10); the operation window (5) and the observation window (10) are both arranged on the wall of the sealed cavity (2). The tank body is a strict closed tank body, and a high pressure resistant material and a pressure resistant design are used to greatly reduce the use amount of flushing nitrogen. The air in the tank body is isolated from the outside air. After being pumped with a vacuum pump, the tank body can reach a high level of vacuum, and then the inner wall of the closed tank is flushed with nitrogen, so that the consumption of nitrogen is greatly reduced and a relatively clean experimental environment is ensured in the tank body. Particles swept away and suspended on blades do not leak, but form a stable aerosol in the closed tank body, which ensures the test accuracy and reliability.

Description

technical field [0001] The invention relates to a smoke box, in particular to a retractable closed sweep-off resuspension smoke box and a detection method thereof. Background technique [0002] As the level of urbanization increases and the scale of cities continues to expand, air pollution in cities, especially megacities, is on the rise, and the air quality situation is further deteriorating. As an important component of haze formation, aerosol is a colloidal dispersion system in which solid or liquid small particles are dispersed and suspended in a gas medium. Its dispersed phase is solid or liquid small particles with a size of 0.001-100 microns. Urban vegetation is the only living infrastructure in the city, which can play a role in reducing atmospheric pollutants such as particulate matter. Plant leaves and branches can directly intercept and hold atmospheric dust and keep it out of the atmospheric environment; at the same time, plant communities (forest belts, fores...

AI Technical Summary

Problems solved by technology

But its disadvantage is that the air used to blow up the particles on the blades is not pure, and the blown-off particles are directly blown away, unable to form a stable aerosol structure, so it has a great impact on the accuracy of the measurement. The test results with great uncertainty

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