High-efficient trapping system for micro-nano powder dust in air

Abstract

The invention discloses an efficient trapping system of micro-nanometer dust in the air. The invention comprises an air trapping opening, a filter core, a sprayer, a big and small flow micro pump, an atomizing nozzle, a liquid storage chamber, trapping liquid, a baffle and a vacuum pump, which construct an air flow route and a liquid circulation route, the system designs the air containing dust and the trapping liquid to experience four different absorption and trapping processes continuously, so as to realize efficient trapping of the micrometer and nanometer dust composed of various grains. By changing the variety of the trapping liquid or adjusting the hydrophile-lipophile balance (HLB) value of the trapping liquid, and improving the wettability of the trapping liquid and the nano dust in the air, micro nanometer fiber, thin sheet dust and other solid dust particles of various forms, containing micro-nano particles, can be efficiently trapped. The invention designs a plurality of air-liquid continuous contact processes, the air containing dust and the trapping liquid are only mixed and absorbed in the system, thus efficiently trapping nano dust in various dust density environment air including occupation workplaces.

Description

[0001] —Technical field [0002] The invention belongs to the collection technology of micron and nanometer dust, in particular to a system for wet high-efficiency collection of submicron and nanoscale dust scattered in the air environment by using a collection liquid. Two background technology [0003] Micro-nano dust refers to particles, fibers or flakes with at least one-dimensional particle size of micron, submicron or nanometer level floating and flying in the air. The scattering of these dusts in the air can cause many discomforts to the human body, such as asthma and silicosis. At present, most of the domestic research on the impact of dust or aerosol on the human body and the development and use of related dust collection and detection instruments only stay at the micron scale (such as PM10, PM2.5), and it is considered that submicron and nanoscale dust It enters and exits the respiratory tract like air components, and will not stay in the respiratory tract, let alone...

AI Technical Summary

Problems solved by technology

The main disadvantage of this technology (instrument) is that it is greatly affected by the environmental humidity and the type of dust material. The amount of static electricity and the type of charge on high humidity and different material particles are different, which seriously affects its collection efficiency and test accuracy.

At the same time, the technology has a low collection efficiency for nano-dust in production sites with high concentrations and large changes in environmental factors

In addition, this technique requires prior knowledge or estimation of particle shape and density for further analytical determination, which is difficult for nanoscale particles

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