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W flame boiler provided with turbulent burners and direct flow burners

A swirl burner and burner technology, which is applied in the field of W flame boilers and pulverized coal boilers, can solve problems such as flow field deflection, and achieve the effects of short combustion stroke, good burnout effect and short residence time

Active Publication Date: 2019-06-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of deflection of the flow field in the W flame boiler furnace, the present invention proposes a W flame boiler arranged with a swirl burner and a direct flow burner

Method used

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  • W flame boiler provided with turbulent burners and direct flow burners
  • W flame boiler provided with turbulent burners and direct flow burners
  • W flame boiler provided with turbulent burners and direct flow burners

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specific Embodiment approach 1

[0015] Specific implementation mode one: combine Figure 1-Figure 3 Describe this embodiment, a W-flame boiler with a swirl burner and a once-through burner in this embodiment, which includes an upper furnace 1, a lower furnace 2, a front furnace arch 3, a rear furnace arch 4 and a plurality of graded furnaces. Wind spout 8. It also includes a plurality of swirl burners 5 and a plurality of direct-flow burners 6, and each swirl burner 5 includes a primary air passage I 9, a secondary air passage I 10 and blades 11, a primary air passage I 9 and a secondary air passage. The air channel I 10 is coaxially arranged, the secondary air channel I 10 is set outside the primary air channel I 9, the blades 11 are arranged in the secondary air channel I 10, and each DC burner 6 includes a primary air channel II 16 and a secondary air channel II 16. The air channel II 17, the primary air channel II 16 and the secondary air channel II 17 are arranged coaxially, and the secondary air chann...

specific Embodiment approach 2

[0016] Specific implementation mode two: combination Figure 3-4 Describe this embodiment, a W-flame boiler with a swirl burner and a once-through burner in this embodiment, it also includes a plurality of exhaust gas nozzles 7, and the plurality of exhaust gas nozzles 7 are installed at the front along the width direction of the furnace. On the wall 12, a plurality of exhaust gas nozzles 7 are installed on the rear wall 13 along the width direction of the furnace, and the exhaust gas nozzles 7 are arranged above the graded air nozzle 8. Other methods are the same as in the first embodiment.

specific Embodiment approach 3

[0017] Specific implementation mode three: combination Figure 3-4 Describe this embodiment, a W-flame boiler with a swirl burner and a once-through burner in this embodiment, it also includes a plurality of exhaust gas nozzles 7, and the plurality of exhaust gas nozzles 7 are installed at the front along the width direction of the furnace. On the furnace arch 3, multiple exhaust gas nozzles 7 on the front furnace arch 3 are arranged between multiple swirl burners 5 and the front wall 12, and multiple exhaust gas nozzles 7 are installed on the rear furnace arch 4 along the furnace width direction , the plurality of exhaust gas nozzles 7 on the rear furnace arch 4 are arranged between the plurality of once-through burners 6 and the rear wall 13 . Other methods are the same as in the first embodiment.

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Abstract

The invention discloses a W flame boiler provided with turbulent burners and direct flow burners and relates to a pulverized coal boiler, and belongs to the technical field of boiler combustion. The Wflame boiler provided with the turbulent burners and the direct flow burners aims to solve the problem the flow field in the W flame boiler deflects. The W flame boiler provided with the turbulent burners and the direct flow burners comprises an upper hearth, a lower hearth, a front furnace arch, a rear furnace arch and a plurality of graded air spray ports, and further comprises the plurality ofturbulent burners and the plurality of direct flow burners; each turbulent burner comprises a primary air channel I, a secondary air channel I and blades; the secondary air channels are arranged outside the primary channels in a sleeving manner; the blades are arranged in the secondary air channels I; each direct flow burner comprises a primary air channel II and a secondary air channel II; the upper hearth is arranged above the lower hearth; the front furnace arch is provided with one row of the turbulent burners in the hearth width direction; the rear furnace arch is provided with one row of the direct flow burners in the hearth width direction; and a plurality of the graded air spray ports are formed in a front wall in the hearth width direction, and a plurality of the graded air sprayports are formed in a rear wall in the hearth width direction.

Description

technical field [0001] The invention relates to a pulverized coal boiler, in particular to a W-flame boiler arranged with a swirl burner and a direct-flow burner, and belongs to the technical field of boiler combustion. Background technique [0002] In China, anthracite reserves account for 10% of the total proven coal reserves. Anthracite has a high degree of coalification, low volatile content, difficult ignition and poor burnout performance. W Flame Boiler is a boiler specially designed for burning anthracite. The combustion in the pulverized coal furnace forms a "W" shaped flame, which increases the residence time of pulverized coal particles in the furnace and helps the pulverized coal to burn out. At present, the number of W-flame boilers in my country accounts for more than 80% of the number of W-flame boilers in the world. [0003] However, due to the asymmetry of the W flame boiler's own structure, the flame shape of the lower furnace often cannot form a symmetric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/08F23C7/00F23L9/00
Inventor 陈智超王青祥闫天舒张鑫曾令艳李争起
Owner HARBIN INST OF TECH
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