Method and device for removal of atmospheric fine particles

Abstract

The invention discloses a method and device for removal of atmospheric fine particles. Air is introduced into a reaction chamber, and ultrasonic atomization humidification is carried out to enable rapid growth of fine particles, a pulsed corona discharge device generates negative ions and free radicals to make fine particles charged, coagulation is accelerated and heterogeneous reaction is carriedout; an aerosol is further introduced into a spiral generator, under the action of a centrifugal force, liquid drops constantly entrain, dissolve and scour fine particles in the airflow, and accumulated liquid flows back to form a liquid film, the wet deposition process of atmospheric fine particles is strengthened continuously, and finally PM2.5 flows out from the lower end of the spiral generator along with the liquid drops. The method and device provided by the invention utilize the hygroscopic growth characteristics of atmospheric fine particles and the natural sedimentation process to remove atmospheric fine particles, are simple and efficient, not only can realize efficient removal of PM2.5 from the air, but also can purify formaldehyde and other gaseous pollutants in the air, and also have the functions of inactivating bacteria and viruses in the air, humidifying the air and the like.

Description

technical field [0001] The invention relates to a method and device for removing atmospheric fine particles, in particular to a method and device for removing fine particles for air purification, and belongs to the technical field of air purification devices. Background technique [0002] Solid particles or droplets with an aerodynamic diameter less than or equal to 2.5 μm in the atmosphere are collectively referred to as PM 2.5 , is scientifically classified as fine particulate matter. Atmospheric fine particles can stay in the atmosphere for a long time due to their small size and light weight. At the same time, due to their large specific surface area, they can absorb more harmful substances such as viruses, bacteria, and heavy metals. Atmospheric fine particles can directly enter the alveoli of the human body with breathing, and remain in the lungs forever, endangering the human nervous system, cardiovascular system and reproductive system. They are the particulate poll...

AI Technical Summary

Problems solved by technology

[0003] Thanks to PM 2.5 It can easily pass through the filter screen, and the traditional air purification methods and devices based on the principle of adsorption filtration are ineffective or too expensive for the removal of ultrafine particles

Due to the extremely low charging efficiency of the particle size range of 0.1-1μm, the removal efficiency of the electrostatic precipitator method is not high. At the same time, the traditional electrostatic precipitator rapping method will also cause the secondary release of the collected fine particles

The latest popular conceptual negative ion air purification method is to generate negative ions and use the diffusivity of the air to actively combine with fine particles in the air, causing them to coagulate and settle. Although in principle it can play a certain role in purification, negative ions can only adhere to Particles cannot remove pollutants and easily lead to problems such as excessive ozone, the air purification effect is not obvious, and the user experience is not good

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