Little oil burner of double-sided ignition combination blunt body

Abstract

The invention discloses a little oil burner of a double-sided ignition combination blunt body. A primary air pipeline is communicated with a secondary coal dust combustion chamber through a section of coal dust concentrator formed by a tapered pipeline with a throat part formed through invagination, a primary coal dust combustion chamber is arranged in the secondary coal dust combustion chamber, and the secondary coal dust combustion chamber extends into a tertiary coal dust combustion chamber. The upper side surface and the lower side surface of the tertiary coal dust combustion chamber connected with the secondary coal dust combustion chamber are provided with a plurality of secondary air inlets in equal intervals, an upper oil combustion chamber and a lower oil combustion chamber are arranged on the primary coal dust combustion chamber after aslant penetrating through the secondary coal dust combustion chamber, a combination blunt body is arranged at the port of the secondary coal dust combustion chamber, and a plurality of through-flow holes are arranged on the upper surface and the lower surface of the second coal dust combustion chamber positioned in the tertiary coal dust combustion chamber. By adopting the top and bottom arrangement of two oil guns, coal dust entering into the primary coal dust combustion chamber are ignited in a double side way, which strengthens turbulent mass and heat exchange of coal dust current and oil flame to rapidly heat the coal dust and form a fire curtain, thereby prolonging the residence time of the coal dust and strengthening the ignition process.

Description

technical field [0001] The invention relates to a pulverized coal burner, in particular to a double-sided ignition combination blunt body micro-oil ignition burner. Background technique [0002] The micro-oil ignition and combustion-supporting technology can realize the boiler ignition with a small amount of oil when the boiler is cold-started, and use a small amount of oil to stabilize the boiler combustion when the boiler is shut down, low load and ultra-low load. This combustion technology is generally When used in high volatile coal, the fuel saving effect can generally reach more than 90%. But for anthracite and lean coal with low volatile content, it can only achieve about 60% fuel-saving effect, and its application is greatly restricted. In the past, the micro-oil ignition burner generally adopted the method of arranging oil guns on one side, so the heating of the pulverized coal was heated on one side; this resulted in a long heating time and required a longer size ...

AI Technical Summary

Problems solved by technology

But for low-volatile anthracite and lean coal, it can only achieve about 60% fuel-saving effect, and its application is greatly limited

In the past, the micro-oil ignition burner generally adopts the method of arranging oil guns on one side, so the heating of the pulverized coal is heated on one side; this results in a long heating time, requiring a longer size of the entire pulverized coal burner

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