Tiny oil ignition whirlwind coal dust burner suitable for meager coal and anthracite coal

Abstract

The invention discloses a micro-oil ignition vortex coal-powder burner used for burning lean coal and blind coal. The invention comprises a vortex burner cylinder made of refractory materials and a guide spiral casing which are connected in series, and the central axes of the two parts overlap with each other. The micro-oil ignition vortex coal-powder burner has the advantages that in the ignition process by using an efficient and big-power gasifying oil gun, the high temperature flame of the oil gun rotationally goes ahead along the tangential direction in the burner cylinder and the coal powder is introduced axially for carrying out vortex burning; a high temperature zone is formed in the burner cylinder so as to realize high temperature splitting and reforging of coal powder volatiles and the thorough burning rate of lean coal can be enhanced; the energy of the high temperature oil flame is collectively released in the burner cylinder so as to directly raise the energy and temperature level of an ignition-unit volume; the burner is beneficial to the heat exchanging of the high temperature off-gas and the coal powder so as to accelerate the firing of coal powder; the burner has low resistance and can be taken as a main burner for normal operation basically without impact on burning structures in the normal operation.

Description

technical field

[0001] The invention relates to a cyclone pulverized coal burner suitable for lean coal and anthracite. Background technique

[0002] The micro-oil ignition pulverized coal burner is an essential part of the micro-oil ignition system. At present, most of the pulverized coal burners used in the micro-oil ignition system are developed based on bituminous coal. Due to the high volatile content of bituminous coal and low ignition temperature, it is easy to be ignited, so the engineering application is good. In my country, the units burning lean coal and anthracite account for a considerable part, so once the micro-oil ignition pulverized coal burner developed based on bituminous coal is used to burn low-quality coal, the pulverized coal burnout rate is very low and the combustion effect is poor. The fuel saving rate will be greatly reduced, and the pulverized coal with a low burnout rate has also brought hidden dangers to the safety of the unit. Contents of the...

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