Standard Particle Generator

Abstract

The invention relates to the field of calibrating dust concentration and powder particle size, in particular to a standard particle generating device. The standard particle generating device comprises a gas distribution mechanism, a boiling-type particle screening device and a bucket-type particle separating device, wherein the boiling-type particle screening device and the bucket-type particle separating device are sequentially and vertically arranged; the boiling-type particle screening device comprises a shell, at least one layer of screen mesh, and an air blowing mechanism; the screen mesh is arranged in the shell; the air blowing mechanism is connected with the shell, and is used for enabling particles on the screen mesh to be in a fluidized boiling state; the bucket-type particle separating device comprises a separating tank; a negative pressure suction-separation mechanism is connected between the upper end of the separating tank and the lower end of the separating tank; the air blowing mechanism and the negative pressure suction-separation mechanism are both connected with the gas distribution mechanism; the shell of the boiling-type particle screening device is connected with the separating tank through an outlet which is formed in the lower part of the boiling-type particle screening device. According to the standard particle generating device, the problems of low efficiency and poor quality of existing standard particle fabrication are solved.

Description

technical field [0001] The invention relates to the field of dust concentration and particle size calibration, in particular to a standard particle generating device. Background technique [0002] The dust test wind tunnel is required to simulate the dust environment when calibrating and verifying the basic error of the dust concentration sensor, so that the dust generating device is required to send dust into the wind tunnel. According to the regulations of MT / T1102-2009 mine dust concentration sensor, the particle diameter of pulverized coal should be less than 74 μm, of which the particles smaller than 10 μm account for 10% to 15%, and the particles smaller than 30 μm account for 47% to 50%. According to the above-mentioned standards, standard particles are mostly used in the verification of online particle size distribution analyzers. In the prior art, standard sieves are generally used to obtain test granules through multiple sieving methods. Although the production of...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a standard particle generating device to solve the problems of low production efficiency and poor quality of existing standard particles

Images