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Obtaining method of combustion characteristics under different coal mill combinations after boiler reconstruction

A technology of coal pulverizer combination and combustion characteristics, applied in the direction of combustion method, control of combustion, regulation of fuel supply, etc.

Active Publication Date: 2016-09-28
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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  • Obtaining method of combustion characteristics under different coal mill combinations after boiler reconstruction
  • Obtaining method of combustion characteristics under different coal mill combinations after boiler reconstruction
  • Obtaining method of combustion characteristics under different coal mill combinations 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 coal mill combinations after the boiler modification 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 combusti...

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Abstract

The invention discloses a method for obtaining combustion characteristics under different coal mill combinations after the boiler improvement, and belongs to the technical field of coal-fired boilers. The method includes the steps of after grid dividing is carried out on a tangentially fired boiler with added SOFA air through the improvement, building a structured grid model of the boiler, obtaining combustor parameters, boundary condition parameters and pulverized coal parameters of the boiler, then building a mathematical model on the basis to carry out combustion analog calculation, and obtaining the combustion characteristics of the boiler under the different coal mill combinations. By means of the method, combustion conditions in the boiler can be accurately shown, comprehensive information of the combustion conditions in the boiler can be obtained, guidance is accordingly provided for the low-nitrogen improvement that the SOFA air is added in the boiler, and comprehensive evaluation is accordingly carried out on the effects after the low-nitrogen improvement.

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 coal mill combinations after the boiler is transformed. 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,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N5/00F23N1/02
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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