Coal powder atomization electric ignition combustor

Abstract

The invention relates to a coal powder atomization electric ignition combustor. The coal powder atomization electric ignition combustor comprises a secondary air ring, a secondary air box body is connected with the secondary air ring through a bolt, a heat preserving body is fixedly connected with an inner cavity of the secondary air ring, an annular groove is formed in the outer side of the heat preserving body, a coal powder atomization diffuser is mounted at the central position of a primary air pipe, a secondary rotational flow body comprises a hollow round table with an air inlet with the large opening diameter and an air outlet with the small opening diameter, an inner wire pie is fixedly connected with the outer side of the heat preserving body, an electric ignition device is arranged in the annular groove in the outer side of the heat preserving body, a third-time air ring is fixedly connected with a flange disc at the outer end of the secondary air ring through a bolt, a third-time air rotational flow blade is arranged between the secondary air ring and the third-time air ring and is welded with the third-time air ring, a primary air pipe is fixedly connected with a secondary air box body, a flame detection device is fixedly connected with a flange on the primary air pipe, and a temperature sensor is fixedly connected with the secondary air ring.

Description

technical field [0001] The invention relates to boiler pulverized coal combustion equipment, in particular to a pulverized coal atomization electric ignition burner. Background technique [0002] Pulverized coal burner refers to equipment that can fully burn pulverized coal in a short period of time and generate high-temperature vortex. According to the application, the pulverized coal burner is divided into: pulverized coal burner for rotary kiln, pulverized coal burner for boiler, pulverized coal burner for asphalt mixing station; and pulverized coal burner for boiler can be divided into single volute according to the structure Swirl burners, double volute swirl burners, axial vane swirl burners, tangential vane burners and once-through burners. [0003] The burner is the key equipment in the boiler combustion system. Not only the pulverized coal is sent into the furnace through the burner, but also the air required for pulverized coal combustion enters the furnace throug...

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Problems solved by technology

[0004] The existing burner structure has the following problems: 1. The burner is ignited by oil or natural gas to ignite pulverized coal, and the ignition is unstable; 2. The combustion is oxygen-enriched combustion, and the content of nitrogen oxides produced is high, which does not meet the national low Nitrogen combustion standard; 3. Incomplete coal combustion leads to waste of coal powder and energy; 4. The flame injected into the furnace by the burner is uneven, resulting in coal powder condensation and uneven heating in the furnace, resulting in defiring

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