Pulverized coal combustion equipment and pulverized coal combustion boiler

Abstract

The invention relates to pulverized coal combustion equipment and a pulverized coal combustion boiler. The pulverized coal combustion equipment comprises a shell, a wind pulverized coal pipeline, a heat source and a smoke assembly, wherein an outlet of the shell is used for communicating with a hearth; the wind pulverized coal pipeline communicates with an inlet of the shell; the heat source is arranged on the shell and used for igniting wind pulverized coal introduced into the shell through the wind pulverized coal pipeline; and the smoke assembly is used for introducing smoke into at least one of the wind pulverized coal pipeline and an ignition area of the heat source. Through the technical means of introducing smoke, the combustion intensity in the pulverized coal combustion equipmentcan be flexibly controlled, and the temperature in the pulverized coal combustion equipment is controlled, so that the coal type adaptability and work condition adaptability of the pulverized coal combustion equipment are improved, overheating and scorification of the pulverized coal combustion equipment are effectively avoided, and safe and efficient combustion of pulverized coal of a power station boiler is realized.

Description

technical field [0001] The invention relates to the field of pulverized coal combustion, in particular to a pulverized coal combustion equipment and a pulverized coal combustion boiler. Background technique [0002] Coal-fired thermal power generation has always been the main force in my country's power industry, and advanced coal-fired power generation technology is the leading direction of thermal power generation. The current coal quality and working conditions of the burner have poor adaptability, and it is difficult to meet the current national conditions with variable coal quality. [0003] 1) The coal type of the current burner has poor adaptability. For example, when the original design is a burner that can ignite low-quality coal, the wind speed in the ignition area is usually designed to ensure ignition. It is easy to slagging or even burn out. Taking a lean-coal boiler in a power plant as an example, after switching to bituminous coal, the four ignition burners ...

AI Technical Summary

Problems solved by technology

When the boiler is at a low load, it is necessary to put in a heat source for stable combustion. At this time, in order to maintain a low load, the amount of fuel input is greatly reduced, but in order to prevent the air powder pipe from being blocked, a certain wind speed (generally above 18m / s) must be maintained. Therefore, the concentration of pulverized coal at this time is relatively low, and the intense combustion in the burner will easily lead to local overheating, resulting in slagging or even burning.

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