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Obtaining method of combustion characteristics under different loads after boiler reconstruction

A technology of combustion characteristics and boiler transformation, which is applied in the field of coal-fired boilers to achieve the effects of high accuracy, good agreement and guaranteed effectiveness

Active Publication Date: 2017-01-04
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

Method used

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  • Obtaining method of combustion characteristics under different loads after boiler reconstruction
  • Obtaining method of combustion characteristics under different loads after boiler reconstruction
  • Obtaining method of combustion characteristics under different loads after boiler reconstruction

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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 a method for obtaining combustion characteristics under different loads after the modification of the boiler 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 tangential combustion manner....

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Abstract

The invention discloses a method for acquiring combustion characteristics under different loads 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 loads. 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 loads after boiler reconstruction. 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, that is, various low NOx tech...

Claims

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Application Information

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Patent Type & Authority Patents(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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