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Obtaining method of combustion characteristics under different perimeter air volumes after boiler renovation

A technology for combustion characteristics and boiler transformation, applied in special data processing applications, instruments, electrical digital data processing, etc.

Active Publication Date: 2017-02-01
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 perimeter air volumes after boiler renovation
  • Obtaining method of combustion characteristics under different perimeter air volumes after boiler renovation
  • Obtaining method of combustion characteristics under different perimeter air volumes after boiler renovation

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] In this embodiment, the following modified boilers are used as simulation calculation objects, and a method for obtaining combustion characteristics under different peripheral air volumes after the modification of the boiler is implemented.

[0048] 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 c...

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Abstract

The invention discloses an acquisition method of a combustion characteristic under different circumference air quantities after boiler improvement, and belongs to the technical field of coal-fired boilers. According to the method, after meshing is carried out on a corner tangential firing boiler added with SOFA air, a structured grid model of the boiler is established, and combustor parameters, boundary condition parameters and coal powder parameters of the boiler are acquired; then, a mathematical model is established on the foundation to carry out combustion analog computation, so that the combustion characteristic of the boiler under different circumference air quantities is acquired. With the method, the combustion condition inside the boiler can accurately reappear, and total information of combustion condition inside the boiler is acquired, thus guidance is provided for low-nitrogen improvement added with SOFA air for the boiler, and comprehensive evaluation is carried out on the effect after 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 peripheral air volumes 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, var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
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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