Solid dust aerosol generation device and method

Abstract

The invention provides a solid dust aerosol generation device and method. The aerosol generation device comprises an ash storage chamber, a mixing chamber, a Venturi tube and a rotating disk; the rotating disk is arranged between the ash storage chamber and the mixing chamber; a plurality of conveying pits are arranged on the side surface of the rotating disk, the conveying pits on the side surface of the rotating disk are filled with dust particles in the ash storage chamber and then enter the mixing chamber from the top of the rotating disk, the conveying pits return to the ash storage chamber from the bottom of the rotating disk, and negative pressure is generated in the mixing chamber by gasflow passing through the Venturi tube, so that the dust is absorbed from the mixing chamber andcan form stable aerosol after being sprayed out of the Venturi tube along with the gasflow. The solid dust aerosol generation device is more suitable for being used under the conveying conditions of fine dust and low-flow dust, is simple and compact in structure, low in cost and high in precision; the generated solid dust aerosol is distributed uniformly and has stable quality.

Description

technical field [0001] The invention relates to the fields of environmental science and medicine, in particular to a small-sized solid dust aerosol generating device that can be used in technical fields such as air purification and medicine, and can adjust the mass flow rate of dust transportation; it can generate dust aerosols with a specified mass concentration, It is used to test the purification efficiency of air purification devices, conduct medicine spray experiments, etc. Background technique [0002] Due to the development of society, the demand for the use of thermal energy by human beings continues to rise, and the emission of fine particulate matter from combustion has increased sharply; the pollution of particulate matter in the environment has become more and more serious, especially the increase in the concentration of fine particulate matter in the atmosphere. Environmental science and medicine are widely concerned. In the field of environmental science in th...

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Problems solved by technology

[0006] This kind of aerosol generator has the following disadvantages: the dust cannot be replenished at any time, which means that the aerosol cannot be continuously generated; since the dust cannot be uniform particles, the blown aerosol is not uniform, and it is easy to appear fine aerosol particles that start to be sent If there are too many, there will be more coarse particles of aerosol sent out; as the dust in the tank decreases, although the spray flow rate remains the same, the dust contained in it will become less and less, that is, the mass flow rate of dust particles is unstable

This device also has obvious defects: firstly, the dust weighing system of the whole system is open, which will cause dust pollution; It is difficult to complete the dust transportation with stable and uniform small flow rate (for example, according to the experimental requirements in GB / T 32085.1-2015 Automotive Air Conditioning Filter Part 1: Dust Filtration Test, the dust transportation volume only needs 0.375g / min); the final negative pressure The gas path of the generator and the mixing chamber after powder spraying are parallel and communicated, which will cause part of the aerosol to be drawn from the negative pressure generator, causing environmental pollution

Such as: a system that can stably generate dust aerosols (201510404938.4); the disadvantage of this device is that it cannot continuously produce ash, and the experiment must be stopped after the dust is used up and refilled

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