Silk screen electrostatic transducer-based flame monitoring device and method

Abstract

The invention discloses a silk screen electrostatic transducer-based flame monitoring device and method that belong to the technical field of flame monitoring. The flame monitoring device is multilayer silk screen electrode arrays that are arranged in a combustion chamber in a parallel manner so as to detect charged particles and fine particles near a cross section of a flame, and therefore an overall flame can be monitored. The silk screen electrode arrays are formed by a plurality of independent thread-shaped metal electrodes, insulating layers are plated on surfaces of the metal electrodes, and two electrodes on nodes of a silk screen are not mutually or electrically connected. Inductive charge signals output by the silk screen electrodes are conditioned and collected via an embedded signal processing module, and a static chromatography imaging algorithm is used for subjecting space charge distribution in the combustion chamber to three dimensional reconstructing operation; characteristic parameters such as flame speed, scintillation frequency, stability, flame front positions and the like can be measured via statistical analysis, cross correlation operation, parameter estimation and data fusion. The flame monitoring device and method can provide a technical means for flame characteristic research and on-line monitoring of an industrial combustion system.

Description

technical field [0001] The invention belongs to the technical field of flame monitoring, in particular to a flame monitoring device and method based on a wire mesh electrostatic sensor. Background technique [0002] Combustion process widely exists in electric power, metallurgy, chemical industry, transportation, food and other industries. Real-time monitoring of combustion flame is beneficial to improve thermal efficiency, safety and environmental protection of combustion system. After years of development, flame monitoring methods based on different principles and technologies have been proposed at home and abroad, including contact detection technologies such as thermocouple-based temperature detectors and ionization detectors, as well as acoustic methods, optical methods based on photoelectric, imaging, and spectral sensors. Non-contact detection technology such as law. Most of the existing detection technologies use the thermal, acoustic and optical properties of the f...

AI Technical Summary

Problems solved by technology

Most of the existing detection technologies use the thermal, acoustic and optical properties of the flame to obtain quantitative or qualitative information of the flame, including temperature distribution, flicker frequency, geometric characteristics (morphology, volume, surface area, jet angle, etc.), brightness, free radical concentration, etc. Distribution, soot concentration distribution, flame front profile, etc., but the electrical characteristics of the flame are rarely used for parameter measurement. It is precisely because of the lack of effective means to measure the flame space electric field that people know little about the electrical characteristics of the flame.

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