Adjustment and optimization method and system for combustion of power plant boiler

A boiler combustion and optimization method technology, applied in the field of thermal power plants, can solve problems such as emissions, large nitrogen oxides, and environmental hazards

Active Publication Date: 2016-01-27
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a thermal power plant boiler combustion adjustment optimization method and system with accurate combustion adjustment to reduce the NOx emissions

Method used

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  • Adjustment and optimization method and system for combustion of power plant boiler
  • Adjustment and optimization method and system for combustion of power plant boiler
  • Adjustment and optimization method and system for combustion of power plant boiler

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Embodiment Construction

[0023] Such as figure 1 As shown, a thermal power plant boiler combustion adjustment optimization method, including steps:

[0024] S100: Keep the boiler load stable, adjust the oxygen quantity at the outlet of the economizer in the boiler, and determine the optimal operating oxygen quantity of the boiler.

[0025] The economizer refers to the heating surface in the tail flue of the boiler that heats the boiler feed water into saturated water under the drum pressure. Since the operating environment and operating conditions of boilers under different load conditions will be quite different, in order to achieve accurate adjustment and optimization of boiler combustion in thermal power plants, it is necessary to conduct separate studies for different loads. Specifically, firstly, adjust the oxygen quantity at the outlet of the economizer, take the oxygen quantity at the outlet of the economizer as the control parameter, and realize the change of the total air volume by changing ...

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Abstract

The invention provides an adjustment and optimization method and system for combustion of a power plant boiler. The method comprises the steps that the load of the boiler is kept stable, the oxygen amount of an outlet of a coal economizer in the boiler is adjusted, and the optimal running oxygen amount of the boiler is determined; the boiler is kept in the optimal running oxygen amount, an SOFA valve opening degree changing test is carried out on the boiler, and the optimal oxygen amount of the boiler under the current load and an SOFA valve opening degree set are obtained; a control function of the boiler is modified according to the optimal oxygen amount under the current load and the SOFA valve opening degree set; a thermal state adjusting test is carried out on the boiler so that the boiler can be in the optimal running work condition under the current load; and the load of the boiler is adjusted, the operation is repeatedly executed, and the optimal running work condition of the boiler under different loads is obtained. In the whole process, based on the actual combustion condition of the combustion boiler, by means of the optimal running oxygen amount, the optimal oxygen amount, the SOFA valve opening degree set and the heat state adjustment, accurate adjustment and optimization on combustion of the power plant boiler are achieved, and nitrogen oxide emission is reduced.

Description

technical field [0001] The invention relates to the technical field of thermal power plants, in particular to a combustion adjustment and optimization method and system for boilers in thermal power plants. Background technique [0002] A thermal power plant is a factory that uses coal, oil, and natural gas as fuel to produce electric energy. Its basic production process is: the fuel is burned in a boiler to heat water to make steam, and the chemical energy of the fuel is converted into heat energy. The steam pressure drives the steam turbine to rotate. The thermal energy is converted into mechanical energy, and then the steam turbine turns the generator, which converts the mechanical energy into electrical energy. [0003] A modern thermal power plant is a large and complex factory that produces electricity and heat. It consists of the following five systems: ① fuel system, ② combustion system, ③ soda system, ④ electrical system, ⑤ control system. In the above system, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N5/00
Inventor 李德波曾庭华廖永进刘亚明徐齐胜陈磊
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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