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Safety monitoring and evaluating system for wall temperature of heating surface in boiler

An evaluation system and safety monitoring technology, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve the problems of numerical simulation result verification, uncertainty of result reliability, and inability to achieve real-time performance, so as to reduce monitoring deviation , Accurate online real-time feedback of wall temperature changes, and the effect of improving calculation accuracy

Pending Publication Date: 2021-09-07
ZHEJIANG UNIV +1
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Problems solved by technology

The disadvantage of this method is that it cannot achieve real-time performance, and the numerical simulation results have not been verified, so the reliability of the results cannot be determined

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  • Safety monitoring and evaluating system for wall temperature of heating surface in boiler
  • Safety monitoring and evaluating system for wall temperature of heating surface in boiler

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Embodiment Construction

[0033] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] A safety monitoring and evaluation system for heating surface wall temperature in a boiler includes an online calculation module for furnace tube wall temperature and a wall temperature safety evaluation display module.

[0035] The furnace tube wall temperature online calculation module, the specific steps are as follows:

[0036] S1: Collect real-time status parameters of boiler operation through the remote monitoring platform, including furnace structure parameters, coal quality parameters, burner operation status, flue gas temperature, flue gas flow rate, working medium temperature, working medium flow rate, and working medium pressure;

[0037] S2: Substituting the above parameters into the online prediction model of the flue gas flow field distribution in the boiler based on the numerical simulation of the full working conditions and the n...

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Abstract

The invention discloses a boiler internal heating surface wall temperature safety monitoring and evaluating system, which comprises a boiler tube wall temperature online calculation module and a wall temperature safety evaluation display module, and is characterized in that the boiler tube wall temperature online calculation module is used for calculating the boiler tube wall temperature; and the wall temperature safety evaluation display module is used for performing real-time wall temperature display, overtemperature region early warning display and historical data comprehensive display on a result obtained by the furnace tube wall temperature online calculation module. The system adopts a four-dimensional combination method of a mechanism model, a mathematical model, numerical simulation and a field test, corrects a numerical simulation result by using test data, and comprehensively considers thermal deviation and hydraulic deviation to calculate the temperature of each metal pipe wall by means of data processing optimization methods such as a neural network and a particle swarm optimization algorithm. Real-time monitoring and operation evaluation of wall temperatures of different regions under different working conditions are realized, and the safety and economical efficiency of power plant operation are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of boiler safety monitoring, and in particular relates to a boiler furnace tube safety state evaluation system for boiler inner wall temperature monitoring. Background technique [0002] In recent years, the power industry has developed rapidly, and coal-fired units in power plants are rapidly developing towards large capacity and high parameters. However, due to the large capacity of boilers and the increase of steam parameters, the uneven distribution of flue gas parameters and the unevenness of steam make water cooling The wall and superheater pipes are prone to local thermal deviations, and the problem of over-temperature leakage and explosion of the water-cooled wall in the upper part of the boiler furnace and the superheater has become increasingly prominent. This not only seriously affects the safe operation of the unit, but also causes huge economic losses to the power plant. It can be seen that, On-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06F30/28G06F111/10G06F119/08
CPCG06F30/27G06F30/28G06F2111/10G06F2119/08
Inventor 吴燕玲周懿钟崴楼玉民鲍听严小华李培周永刚
Owner ZHEJIANG UNIV
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