Method for representing and diagnosing combustion instability

An unstable and unstable combustion technology, applied in the field of combustion, can solve the problems of lack, poor timeliness, and no phase space prior information of chaotic time series, etc., to reduce economic losses, reliable detection, and simple and feasible methods. Effect

Inactive Publication Date: 2010-06-23
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

The core of phase space reconstruction technology is the determination of embedding dimension and time delay. At present, there is no general algorithm suitable for various chaotic time series. There is a certain subjectivity, the reason is that we do not have any prior information about the phase space of the chaotic time series, so we lack a clear goal to measure the effect of phase space reconstruction, and a large number of experimental data prove that this method Real-time, poor timeliness

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  • Method for representing and diagnosing combustion instability
  • Method for representing and diagnosing combustion instability
  • Method for representing and diagnosing combustion instability

Examples

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Embodiment 1

[0027] A reverberatory furnace for copper refining in a smelting plant monitors the combustion process in real time, collects real-time patterns of combustion flames through frame collectors and image collectors, and after image processing, converts color images into grayscale images and saves the grayscale pattern data , according to the attached figure 2 In this way, the nonlinear time series sparse samples are extracted from the pattern along the evolution direction of the flame. For the extracted time series, calculate with the help of the computer program for calculating 0-1Test, and draw the 0-1Test evolution diagram of the real-time pattern. Analyze the drawn k-c diagram. If the value of k is dense near 0 (individual scattered points are not considered), it means that the entire combustion state is in a non-chaotic state and is unstable (as shown in Figure 3(a)). If the value of k is dense near 1 (individual scattered points are not considered), it means that the who...

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Abstract

The invention discloses a method for representing and diagnosing combustion instability, which is mainly applied to real-time monitoring, process and safety control technology of combustion equipment, such as a power station boiler, an industrial boiler and the like related to the combustion instability. The method comprises the following steps of: (1) acquiring a real-time pattern by utilizing a color CCD camera and an image acquisition card; (2) performing gray processing on the real-time pattern through digital image processing; and (3) extracting a sparse sample of a nonlinear time sequence of the pretreated flame real-time pattern. The detected result is acquired by a method for judging chaos 0-1 Test of a nonlinear power system so as to judge the combustion instability. The method is used for detecting the flame instability of any combustion equipment, is simple and practicable, can nimbly, rapidly and reliably detect the combustion situation in a combustion chamber in real time, provides a reliable and practical method for diagnosing the combustion instability of the combustion equipment, such as the power station boiler, the industrial boiler and the like.

Description

technical field [0001] The invention relates to a method combining combustion technology, computer technology, digital image processing technology and nonlinear dynamic system theory. The invention belongs to the technical field of real-time monitoring and process and safety control of power station boilers and industrial furnaces, and is specifically an effective method for diagnosing combustion instability of all combustion equipment involving power station boilers and industrial furnaces. Background technique [0002] The combustion flame is the most direct reflection of whether the combustion state is stable. Unstable combustion will not only reduce thermal efficiency, but also generate noise and pollution. In extreme cases, it will cause fire extinguishing in the furnace. Improper handling will induce furnace explosion and cause industrial accidents. Therefore, whether the combustion state of the furnace flame is stable or not is directly related to the safety and econ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/60F23N5/08G06K9/46
Inventor 王华孙辉王仕博徐建新
Owner KUNMING UNIV OF SCI & TECH
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