Self-adaptive control method and system of combustion of multiple types of coal of boiler

Abstract

The invention discloses a self-adaptive control method of combustion of multiple types of coal of a boiler. The method includes the steps that a boiler combustion test is carried out by adopting the various preset types of coal to acquire boiler operation control parameters; a plurality of boiler operation control modes corresponding to the various preset types of coal are formed; a boiler operation control mode corresponding to an actual type of coal for combustion is called in a boiler control system to control the boiler. The invention further discloses a self-adaptive control system of combustion of the multiple types of coal of the boiler. When the type of coal, for combustion, of the boiler is changed, the boiler operation control mode corresponding to the actual type of coal for combustion is called, and therefore the speed and precision of operation adjustment of low-nitrogen combustion of multiple types of coal of a pulverized coal boiler are improved. The self-adaptive control method and system of combustion of the multiple types of coal of the boiler can prevent misoperation, reduce the workload of manual adjustment, improve the optimal control effect significantly and improve the safety, economy and environment protection performance of boiler operation, and boiler operation can be fast and effectively adjusted.

Description

technical field [0001] The invention relates to the technical field of boiler combustion, in particular to an adaptive control method for multi-coal combustion of a boiler and an adaptive control system for multi-coal combustion of a boiler. Background technique [0002] The emission of nitrogen oxides (such as NO, NO2 and N2O, collectively referred to as NOx) produced by coal combustion is one of the main sources of air pollutants. There are strict requirements for the control of NOx emissions during the boiler combustion process. The main factors affecting the generation and emission of NOx in pulverized coal boilers are the type of coal, the nitrogen content of coal, the combustion method, the volumetric heat load of the boiler, the structure of the burner, and the operating air volume; among them, the structure of the burner and the operating air volume The impact is more significant. [0003] The principles adopted to control the generation and emission of NOx during t...

AI Technical Summary

Problems solved by technology

However, many power plant boilers have to use non-design coal types, and they are non-design coal types with large differences in combustion characteristics in different regions, and the quality of coal combustion is getting worse and worse.

In addition, the wide application of low NOx combustion technology has brought a series of problems to the boiler operation: unstable combustion or even fire extinguishing, increased carbon content in fly ash, reduced combustion efficiency, increased coal consumption for power generation, difficulty in controlling steam temperature characteristics, and severe slagging , burst tubes, etc. affect the safe, economical and environmentally friendly operation of the boiler

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