Method for boiler combustion optimization with combination of irreversible thermodynamics

A technology of boiler combustion and optimization methods, applied in the direction of controlling combustion, lighting and heating equipment, etc., can solve problems such as rarely guiding power plants

Active Publication Date: 2014-07-23
STATE GRID CORP OF CHINA +2
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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 performa

Method used

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Embodiment Construction

[0101] The present invention will be further described in detail below in conjunction with specific embodiments.

[0102] The steps to optimize the boiler combustion model with the boiler combustion optimization method incorporating irreversible thermodynamics are as follows:

[0103] (1) Carry out offline modeling, and construct a 3D simulation model according to the specific structure of the actual power plant boiler. The specific boiler operating parameters are obtained through the DCS system, or directly obtained through online measurement of instruments and equipment, and these parameters are used as initial conditions for numerical simulation of the furnace. Such parameters include: primary air speed, secondary air speed, tertiary air speed, primary air temperature, secondary air temperature, tertiary air temperature, burner swing angle, furnace negative pressure, elemental analysis and industrial analysis of fuel.

[0104] Numerical simulation results can directly obta...

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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...

Claims

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Application Information

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IPC IPC(8): F23N5/00
Inventor 米翠丽高欣张姣闫晓沛
Owner STATE GRID CORP OF CHINA
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