Boiler section two-dimensional temperature field reconstruction algorithm based on maximum radiation signal intensity monitoring

Abstract

The invention discloses a boiler section two-dimensional temperature field reconstruction algorithm based on maximum radiation signal intensity monitoring. Three infrared temperature measurement sensors are arranged on each of a left wall and a rear wall of a boiler; the average temperature value and the maximum temperature value are recorded as Ta and Tm respectively; the highest temperature grid position of the global temperature field is positioned at the intersection position of i and k; the temperature value of the Tik is taken as a known value to be substituted into a solving equation set, then an ART algebraic iteration algorithm is used for temperature field reconstruction, and a reconstruction field 1 is formed; actually measured temperature values of all positioned infrared probes are taken as known values to be substituted into the solving equation set, then temperature field reconstruction is carried out by using an ART algorithm to obtain a reconstruction field 2, and the reconstruction field 2 is a final temperature field; the infrared probe can measure the average value and the maximum value of the current path temperature at the same time, temperature field reconstruction is carried out based on the improved ART reconstruction algorithm corrected by the maximum radiation signal, and the goodness of fit between the reconstructed temperature field and the actual temperature field is ensured.

Description

technical field [0001] The invention relates to the technical field of boiler temperature monitoring, in particular to a boiler cross-sectional two-dimensional temperature field reconstruction algorithm based on maximum radiation signal intensity monitoring. Background technique [0002] With the rapid development of industrial Internet, cloud computing, mobile applications, artificial intelligence and other technologies, industrial production has begun to accelerate towards digitization, informationization and intelligence. my country has also released "Made in China 2025", which requires the deep integration of informatization and industrialization to lead and drive the development of the entire manufacturing industry. Significant progress has been made in the digitization, networking, and intelligence of the manufacturing industry. It has become a consensus that intelligence is an inevitable trend of future industrial development. [0003] The combustion process inside t...

AI Technical Summary

Problems solved by technology

[0004]In the traditional temperature field reconstruction algorithm, the equations about discrete grid temperature established according to the average temperature of each path are typical ill-conditioned equations, simply using algebraic A certain degree of "distortion" will appear in the reconstruction of the iterative reconstruction algorithm

Figure 1 shows a common 300MW power plant Boiler furnace temperature measurement system layout, that is, three infrared probes are arranged on two adjacent furnace walls to monitor the average temperature of the current path in real time. In this paper, the ART algebraic iterative CT reconstruction algorithm is used to reconstruct the assumed temperature field. The reconstruction results and reconstruction errors As shown in Figure 1, it can be seen that the ART algorithm is used There is a certain degree of deviation between the reconstructed temperature field distribution and the original temperature field distribution. Although the relative size of the temperature distribution on the cross-section can be reflected, the maximum value of the temperature on each path has a large deviation. Afterwards, the maximum temperature in the temperature field decreased from 1800°C to 1683°C. This deviation of the maximum temperature will cause large errors in the safety alarm and intelligent operation of the boiler, and affect the safe and economical operation of the boiler.

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