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Pulverized coal shade separate arrangement mode of direct-current burner with double fireballs

A technology of concentration separation and burner, applied in burners, combustion methods, burners burning powder fuel, etc., can solve the problems of inability to adapt to anthracite combustion, low heat load, etc., and achieve good air supply conditions and secondary air speed. Reduced, adaptable effect

Active Publication Date: 2013-05-08
SHANGHAI BOILER WORKS
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Problems solved by technology

It can be seen that since each group of burners 8 is arranged at intervals along the vertical direction with 12 primary air pulverized coal nozzles 5, the heat load q on the wall surface of the burner area in this arrangement Hr Low, can not meet the requirements of anthracite combustion

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  • Pulverized coal shade separate arrangement mode of direct-current burner with double fireballs
  • Pulverized coal shade separate arrangement mode of direct-current burner with double fireballs
  • Pulverized coal shade separate arrangement mode of direct-current burner with double fireballs

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Embodiment Construction

[0024] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0025] to combine Figure 4 and Figure 5 To describe this embodiment, Figure 4 for Figure 5 I-I sectional view, Figure 5 for Figure 4 Section view of II-II.

[0026] The present invention provides an anthracite double-fireball octagonal direct-flow burner with a separation arrangement of pulverized coal concentration and light, including a boiler body 1, a furnace 2, a coal mill 3, a pulverized coal separator 4, a pulverized coal pipeline 5, and a primary air / concentration furnace. Pulverized coal nozzle 6, primary air / light coal pulverized nozzle 7, secondary air nozzle 8, pulverized coal thick-lean separator 13. Each boiler body 1 is equipped with six coal mills 3, namely the first coal mill A, the second coal mill B, the third coal mill C, the fourth coal mill D, the fifth coal mill E and The sixth coal mill F. The...

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Abstract

The invention provides a pulverized coal shade separate arrangement mode of a direct-current burner with double fireballs for burning anthracite coal. The pulverized coal shade separate arrangement mode is characterized in that each boiler is provided with eight groups of burners; the eight groups of burners are at the same level; four groups of burners form an imaginary circle inside a hearth; the other four groups of burners form another imaginary circle inside the hearth; each group of burners are divided into two small groups in the vertical direction; the first small group of burners are named as 'primary air / thick pulverized coal' burners; and the second small group of burners are named as 'primary air / thin pulverized coal' burners. The thermal load qHr of the wall surface of a burner zone is high under the premise of ensuring the power of the entire boiler; and timely inflaming of anthracite pulverized coal air flow and low-load stable combustion of the boiler without oil can be ensured.

Description

technical field [0001] The invention relates to an arrangement method for separation of concentration and light of pulverized coal of a double-fireball octagonal direct-flow burner which uses anthracite, and belongs to the technical field of pulverized coal combustion devices. Background technique [0002] my country's proven coal reserves are about 640 billion tons, of which low-volatile anthracite accounts for about 14.6% of the total coal reserves. my country's thermal power plants burn anthracite accounts for about 3% of the total coal used for power generation, and this figure is still increasing. Anthracite has low volatile content, low hydrogen content, high ignition temperature, and slow flame propagation speed. If the combustion organization is not good, it is prone to unstable low-load combustion, and when the coal quality deteriorates, the boiler is prone to flameout under high load. Combustion efficiency is also generally lower. [0003] At present, W-flame boi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/08F23K3/02
CPCF23K3/02F23C5/08F23C6/00F23D1/02F23C5/10F23C6/047F23C2201/101Y02E20/34
Inventor 张建文乌晓江熊杰马胜
Owner SHANGHAI BOILER WORKS
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