On-line particle size distribution measuring device and method based on array sonic transducer

Abstract

The invention discloses an on-line particle size distribution measuring device and method based on an array sonic transducer, which belongs to the technical scope of gas-solid two-phase flow on-line measurement. The on-line particle size distribution measuring device adopts the structure that a sound emission detection test piece with a plurality of sound emission detecting units is mounted on a gas-solid two-phase flow pipeline, a particle collision vibration member generates a sound emission signal, a piezoelectric film sensor detects the sound emission signal, sound insulation rubber is arranged between the vibration member and the sound emission detection test piece, and an embedded data processing module is adopted to process and analyze the sound emission signal to obtain the particle size distribution information. Each sound emission detecting unit can measure the particle size distribution of particles in the local space, and together with fusion of all local information in a pipeline, the integral particle size distribution of the particles in the pipeline can be obtained, thereby providing measurement data for powder flow behavior research and industrial field on-line diagnosis.

Description

Technical field [0001] The invention belongs to the technical range of on-line measurement of gas-solid two-phase flow, and particularly relates to an on-line measurement device and method for particle size distribution based on an array acoustic sensor. Background technique [0002] Powder particles are the most common form of materials and products in the process industry. They are widely used in many industrial fields such as medicine, food, chemical industry, and metallurgy. The material properties of the powder can be characterized by multiple parameters such as density, shape, size, hardness, porosity, and dispersion. The particle size is an important parameter that determines the quality and performance of the product. For example, the particle size of the preparation will directly affect the drug The effectiveness, stability and safety of the cement. The strength, fluidity, coagulation and hardening process of cement are closely related to the particle size of the powder....

AI Technical Summary

Problems solved by technology

At present, the common particle size measurement methods are still difficult to achieve online measurement of particle size in pneumatic conveying pipelines. For example, the sieving method is cumbersome to operate, takes a long time, and the measurement results are seriously lagging behind. The optical measurement method has harsh environmental requirements and is difficult to adapt to industrial sites.

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