Improved thermal power plant boiler temperature field reconstruction temperature measuring algorithm

Abstract

The invention discloses an improved thermal power plant boiler temperature field reconstruction temperature measuring algorithm. The improved thermal power plant boiler temperature field reconstruction temperature measuring algorithm comprises the following steps that firstly, a sound wave propagation path ordinary differential equation mathematical model of sound waves in a non-uniform temperature field in a hearth is derived according to the target requirement and the propagation characteristic of the sound waves in the non-uniform temperature field, by means of the functional extremum problem and geodesic problem and on the basis of the Fermat principle; secondly, an ordinary differential equation is solved through a shooting method, the nonlinearity two-point boundary value problem of the sound wave propagation path mathematical model is converted into an ordinary initial value problem, approaching is achieved by setting different initial values in an iteration mode, and the numerical solution of the sound wave propagation path is worked out through the numerical value; thirdly, on the basis of sound wave propagation path correction, the acoustic CT algorithm is called, the sound wave propagation path in an original algorithm is improved according to a linear processing method, and the temperature field reconstruction and the like are carried out by introducing the actual sound wave propagation path bent through the effect of the non-uniform temperature field.

Description

technical field [0001] The invention relates to an improved thermal power plant boiler temperature field reconstruction temperature measurement algorithm, which belongs to the field of thermal power plant acoustic temperature measurement. Background technique [0002] In coal-fired boilers of large-scale thermal power plants, the distribution of temperature field is one of the important parameters reflecting the combustion process and equipment status. It is not only of great significance for boiler control and combustion diagnosis, but also directly affects the ignition of pulverized coal, Burnout, as well as boiler economy and safety, also affects pollutant emissions. The distribution of the temperature field in the furnace can reflect the combustion operation in the furnace, provide a reliable basis for the operation of the operator, and provide a temperature signal in the furnace for the automatic device of thermal control. If the distribution of the temperature field i...

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Problems solved by technology

[0005] Purpose of the invention: In view of the problems and deficiencies in the prior art above, the purpose of the present invention is to provide an improved temperature field reconstruction algorithm for temperature measurement. For the difficulty in temperature measurement inside the furnace, the existing acoustic temperature field reconstruction algorithm calculates the temperature measurement The problem of inaccurate results, further improve the accuracy of temperature field reconstruction, so as to obtain more accurate temperature field distribution

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