Method for boiler combustion optimization with combination of irreversible thermodynamics

Abstract

The invention discloses a method for boiler combustion optimization with the combination of the irreversible thermodynamics. The method is characterized by comprising the following steps that (1) when combustion optimization adjustment is conducted on a boiler, each time of parameter adjustment serves as an original working condition, overall modeling is conducted on the researched boiler, numerical simulation is conducted on the working conditions on the basis of a CFX platform, the carbon contact in fly ash and the emission value of NOx in each working condition can be given according to a simulation result, and original data required by calculation of radiation entropy generation and convection entropy generation can be obtained; (2) radiation entropy generation, conversion entropy generation and flow-resistance entropy generation of a heat-receiving face are calculated; (3) overall entropy generation of the heat-receiving face, the boiler heat efficiency, the carbon contact in the fly ash and the emission value of NOx serve as objective functions, and a combustion model is optimized through a least square support vector machine. According to the method, the irreversible thermodynamics is combined with boiler combustion optimization, so that the boiler can be better guided for actual operation.

Description

technical field [0001] The invention belongs to the field of combustion adjustment or control, and in particular relates to a boiler combustion optimization method incorporating irreversible thermodynamics. Background technique [0002] The safe, economical and stable operation of power plant boilers plays a pivotal role in the entire power plant, and the combustion system is an important part of power plant boilers, and the quality of its combustion conditions largely determines the economical operation of boiler equipment and even the entire power plant. Therefore, strengthening the optimization of boiler combustion conditions has become one of the most important contents and purposes of boiler operation. [0003] At present, the combustion optimization of the boiler is aimed at ensuring the safety of the boiler, improving the thermal efficiency of the boiler and reducing pollutant emissions, etc., and obtaining the optimal combustion method by adjusting various parameters...

AI Technical Summary

Problems solved by technology

But so far, these studies are only limited to qualitative analysis, and the research results are mainly used to evaluate the thermal performance of the heat exchanger and optimize the design of the heat exchanger, and are rarely used to guide the actual operation of the power plant.