Apparatus and method for removing grains with combined action of sound wave and additional seed grain

Abstract

The invention relates to a device used for removing absorbable granules PM2.5 based on acoustic wave and with the addition of associative action of seed granules and a method thereof, in particular to a set of devices used for removing the absorbable granules (hereinafter called PM2.5 for short) with grain diameter less than 2.5 micrometers in dusty gas and a method thereof. The device comprises a sound source, an acoustic agglomeration chamber, a feedway for the seed granules, subsequent normal dedusting equipment, etc. When flue gas discharged by various combustion sources or other dusty gas flows through the acoustic agglomeration chamber, fine granules in airflow arise entrainment of different degrees under the action of the acoustic wave, while the added seed granules nearly do not arise entrainment due to relatively large inertia thereof; meanwhile, the fine granules and the seed granules are different in gravity settling and acoustic drift. The three reasons lead to relative movement between the fine granules and the seed granules, thus generating quite high collision rate between the absorbable granules PM2.5 and the seed granules. After the absorbable granules PM2.5 collide with the seed granules, agglomeration happens between the absorbable granules PM2.5 collide with the seed granules; coacervate generated by the agglomeration is further removed by the subsequent normal dedusting equipment.

Description

technical field [0001] The present invention relates to a set of removing inhalable particulate matter (hereinafter referred to as PM) whose particle size is less than 2.5 microns in dusty airflow. 2.5 ) device and method, belonging to the technical field of pollution control equipment manufacturing. Background technique: [0002] In today's particulate matter emission control technology, the traditional method is based on the principles of particle inertia, diffusion, and electrostatic interaction, using conventional removal equipment such as electrostatic precipitators, cyclone separators, bag filters, and ceramic filters to remove particles. Although these devices have achieved very high efficiency in removing particles larger than 5 μm, the fine particulate matter PM 2.5 The removal efficiency is low, and there is still a large amount of fine particles discharged into the atmosphere, which cannot meet the current increasingly stringent environmental protection requireme...

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Problems solved by technology

[0013] Among the patents related to particle removal retrieved above, none of the respirable particles PM can be effectively removed 2.5

The eighth patent is to use ultrasonic vibration method to remove dust. Because the ultrasonic dust removal effect at lower power is poor, and the energy consumption is larger when using higher power ultrasonic, it is difficult to ensure long-term stable and reliable work.

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