Multi-bluff body air-coal separating pulverized coal combustion device

Abstract

The invention relates to a pulverized coal combustor, in particularly to a multi-bluff body air-coal separating pulverized coal combustion device which is used for a four-corner tangentially-fired pulverized coal boiler. The multi-bluff body air-coal separating pulverized coal combustion device is characterized in that fixed separating baffle blocks I are arranged on a combustor inlet elbow lower cylinder and a combustor inlet elbow upper cylinder in a combustor inlet elbow, a fixed separating baffle block II is arranged in a space between the combustor inlet elbow lower cylinder and the combustor inlet elbow upper cylinder, and a fixed separating baffle block III is arranged in front of a pulverized coal concentrator; a combustor nozzle is provided with two to four layers of bluff bodies. According to the multi-bluff body air-coal separating pulverized coal combustion device disclosed by the invention, the effect of reducing the oxynitride emission concentration is increased by about 40% on the premise of the effect of reducing the oxynitride emission concentration of an original air-coal separating pulverized coal combustor, and the oxynitride emission concentration is reduced from below 300mg / Nm<3> (6% of O2) of the original air-coal separating pulverized coal combustor into below 200mg / Nm<3> (6% of O2) of the multi-bluff body air-coal separating pulverized coal combustion device.

Description

Technical field [0001] The present invention involves a kind of coal burner, which is specifically a multi -blunt body that is used to burn coal boiler with a multi -blunt body. Background technique [0002] The thickness of the coal powder is widely used in the coal flood boilers of the power plant. The form of the thickness of the coal also has various forms, but basically the level of the level is separated.However, for the current domestic power station boiler burning coal quality cannot reach the design value, and a large amount of inferiority of inferior tobacco coal, poverty coal, or smoke -free coal power station boiler, the existing level of burning technology does not as much as possible to reach the low and low NO. X , Anti -slag and high temperature corrosion, long service life and other indicators cannot meet the production operation requirements of power plants, so it is imminent to solve the above problems. Invention content [0003] The purpose of the present inv...

AI Technical Summary

Problems solved by technology

However, for domestic power plant boilers whose combustion coal quality cannot reach the design value, and power plant boilers that burn a large amount of low-quality bituminous coal, lean coal, or anthracite, the existing level of thick-lean combustion technology cannot fully achieve stable combustion and low NO X , anti-slagging and high-temperature corrosion, long service life and other indicators cannot meet the production and operation requirements of power plants, so it is imminent to solve the above problems

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