On-line powder flowing measurement device and method based on array type static sensor

Abstract

The invention discloses an on-line powder flowing measurement device and method based on an array type static sensor in a technical range of on-line measurement of gas-solid two-phase flows. A static sensing detection sheet is mounted on a gas-solid two-phase flow pipeline and provided with a plurality of static sensing units; each static sensing unit is provided with two to three strip-shaped metal electrodes and corresponding signal amplifying circuits; when particles flow through adjacent electrodes, similar static sensing signals can be generated; an embedded type data processing module is used for performing synchronous sampling and mutual correlation calculation on static sensing signals of adjacent electrodes, so that the particle flowing speed and the particle relative volume concentration are obtained; and each static sensing unit can measure the instantaneous speed and the instantaneous concentration of particles in a local space where the unit is located and fuse all local information in the pipeline, so that the space average speed, the space average concentration and the instantaneous quality / volume flow of the particles in the pipeline are obtained, and measuring data are provided for a power flowing characteristic research and industrial site on-line diagnosis.

Description

technical field [0001] The invention belongs to the technical scope of on-line measurement of gas-solid two-phase flow, and in particular relates to an on-line measurement device and method for powder flow based on an array type electrostatic sensor. Background technique [0002] Pneumatic conveying is an effective method of using airflow to convey powdery and granular materials in pipelines. It is widely used in many industrial fields such as electric power, metallurgy, chemical industry, environmental protection, and medicine. There are interface effects and relative velocities in gas-solid two-phase flow, and the phase interface is randomly variable in time and space, resulting in extremely complex flow characteristics. So far, people's understanding of the flow mechanism of gas-solid two-phase flow is still quite limited. In order to make a reasonable and accurate explanation of the powder flow phenomenon, effectively monitor the operation status of equipment, and optimi...

AI Technical Summary

Problems solved by technology

The measurement of gas-solid two-phase flow parameters is an internationally recognized problem. After years of research and exploration, measurement methods for powder flow parameters based on different principles and technologies have been proposed at home and abroad, such as constant velocity sampling method, optical method, microwave method, Ultrasonic method, process tomography, electrostatic method, etc. These technologies are mainly developed for the on-line continuous measurement of powder flow parameters in the industrial field. They cannot perform systematic and comprehensive measurement of powder flow parameters, so they cannot provide accurate information on powder flow parameters. Exhaustive data for scientific studies of flow properties and laws

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