PM2.5 feeding system and method thereof

Abstract

The invention discloses a PM2.5 feeding system and a method thereof. A vibrating screen feeder, an aerosol dust raising device, an aerosol buffer tank and diluter, a PM2.5 separator, a draught fan and an aerosol buffer tank are sequentially connected; a returning charge outlet of the aerosol buffer tank, a returning charge air flow control valve, a returning charge air flow meter and a vibrating-screen-level gas inlet at the bottommost layer of the vibrating screen feeder are sequentially connected; air flow supplied by the air compressor is divided into two ways by an air supplying air flow control valve of the air compressor, one way of the air flow is connected with an air inlet of the aerosol buffer tank and diluter through a diluter compressed air supplying control valve and a diluter compressed air supplying air flow meter, and the other way of the air flow is connected with an air inlet of the aerosol dust raising device through a dust raising device jet flow air pressure control valve and a dust raising device jet flow air pressure meter. According to the invention, mineral particles or carbonaceous particles which are collected actually act as particle sources, so that higher-concentration PM2.5 aerosol is generated automatically, continuously and stably, and the aerosol can be cut with accurate particle size.

Description

technical field [0001] The invention relates to an aerosol particle generating system, in particular to a PM 2.5 Feeding system and method thereof. Background technique [0002] The aerosol particle generation system can not only be used for the study of the physical and chemical characteristics of particles, the charging mechanism of particles, and the mechanism of condensation and removal of particles, but also plays an important role in the research of simulating the atmospheric environment and simulating the flue gas environment of power plants. At present, the aerosol particle generation system is mainly divided into two types of technology, one uses combustion to directly generate particles, and the other uses collected dust particles as a particle source for particle dusting. [0003] In the technology of directly generating particles by combustion, carbon black particles are mainly generated by burning methane or propane gas with oxygen. This aerosol has small parti...

AI Technical Summary

Problems solved by technology

Among them, the screw feeding system and the vibrating feeding system make the particles enter the pipeline to form aerosol through the screw rotation and vibration respectively, and the negative pressure suction injection system directly sucks the particles into the pipeline by forming a negative pressure state. Forming aerosols, all three can form stable aerosols to a certain extent, but the disadvantage is that they lack selectivity for particle size and cannot form aerosols with specific particle size requirements

The fluidized bed feeding system is to blow a certain flow of gas at the bottom of the bed, and through the action of air force and the gravity of the particles themselves, the particles will keep rolling up and down, and finally the particles with smaller mass will escape to form aerosol. This technology In theory, it is selective to particles, but in actual operation, the input gas flow cannot be well controlled, and it is easy to cause the escape of large particles

The water vapor evaporation carrying technology is to soak the particles in the liquid phase, heat the liquid phase so that the liquid phase carries part of the particles during the evaporation process, and then dry the liquid phase in the later stage to obtain the dry particle state. This technology can obtain particle However, it is easy to destroy the original physical and chemical properties of the particles during the process of particle infiltration and the process of drying the liquid phase in the later stage

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