Method for acquiring combustion characteristics under different proportions of CCOFA and SOFA after boiler improvement

A technology for combustion characteristics and boiler transformation, which is applied in the direction of combustion method, combustion control, air supply adjustment, etc.

Active Publication Date: 2014-08-06
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

However, at present, there is no method that can simulate the combustion situation in the boiler after the low-nitrogen transformation of the boiler, so as to provide guidance for the low-nitrogen transformation of the boiler and conduct a comprehensive evaluation of the effect of the low-nitrogen transformation

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  • Method for acquiring combustion characteristics under different proportions of CCOFA and SOFA after boiler improvement
  • Method for acquiring combustion characteristics under different proportions of CCOFA and SOFA after boiler improvement
  • Method for acquiring combustion characteristics under different proportions of CCOFA and SOFA after boiler improvement

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Embodiment Construction

[0047] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] In this embodiment, the following modified boilers are used as simulation calculation objects, and the method for obtaining combustion characteristics under different ratios of CCOFA wind and SOFA wind after the boiler transformation is implemented.

[0049] The boiler is 660MW, subcritical pressure, once reheated, single steam drum, control cycle, four-corner injection combustion double tangential combustion coal-fired boiler, the boiler body is as follows figure 1 shown. The open-air layout is adopted, and the boiler is a product of ABB-CE company. The combustion pulverizing system is a medium-speed grinding direct blowing type, and a straight-line wide adjustment ratio swing burner is used. The cross section of the burner is as follows: figure 2 shown. Four DC swing burners are arranged at the four corners of the boiler in a tan...

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Abstract

The invention discloses a method for acquiring combustion characteristics under different proportions of CCOFA and SOFA after boiler improvement and belongs to the technical field of coal-fired boilers. The method comprises the steps of performing mesh generation on an improved corner tangential firing boiler with SOFA increased, establishing a structural mesh model of the boiler and acquiring a combustor parameter, a boundary condition parameter and a coal dust parameter of the boiler; establishing a mathematical model, and performing combustion analog computation to obtain combustion characteristics of the boiler under different proportions of CCOFA and SOFA. By means of the method, combustion conditions in the boiler can reproduce accurately, comprehensive information of combustion conditions in the boiler can be acquired, guidance is provided for low nitrogen transformation in increasing SOFA of the boiler, and comprehensive evaluation is performed on effect after low nitrogen transformation is performed on the boiler.

Description

technical field [0001] The invention relates to the technical field of coal-fired boilers, in particular to a method for obtaining combustion characteristics under different ratios of CCOFA air and SOFA air after boiler transformation. Background technique [0002] With the grim situation of environmental governance, my country's NOx emission restrictions will become increasingly strict. The Ministry of Environmental Protection has promulgated the "Technical Policy on Nitrogen Oxide Prevention and Control in Thermal Power Plants", and it is clear that during the "Twelfth Five-Year Plan" period, China will fully promote the reduction of NOx in my country. Prevention work. At present, there are mainly two technologies for controlling NOx in power plant boilers at home and abroad: one is to control the generation, which is mainly to change the combustion conditions of coal through various technical means in the combustion process, thereby reducing the amount of NOx generated, th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N3/00
Inventor 李德波徐齐胜刘亚明沈跃良
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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