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Layout method of separation of thick and thin coal pulverized coal in double-fireball octagonal direct-flow burners

A technology of concentration separation and burner, applied in the direction of combustion method, combustion chamber, combustion type, etc., can solve problems such as inability to adapt to anthracite combustion, low heat load, etc., achieve good air supply conditions, reduce secondary air speed, and reduce emissions. amount of effect

Active Publication Date: 2016-05-04
SHANGHAI BOILER WORKS
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  • Description
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  • Application Information

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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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  • Layout method of separation of thick and thin coal pulverized coal in double-fireball octagonal direct-flow burners
  • Layout method of separation of thick and thin coal pulverized coal in double-fireball octagonal direct-flow burners
  • Layout method of separation of thick and thin coal pulverized coal in double-fireball octagonal direct-flow burners

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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] 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 fu...

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Abstract

The present invention provides an anthracite-fired double-fireball octagonal direct-flow burner coal dust separation arrangement, which is characterized in that eight groups of burners are arranged in each boiler, and the eight groups of burners are located at the same elevation, of which four groups of burners are located in the furnace An imaginary tangent circle is formed inside, and another four sets of burners form another imaginary tangent circle in the furnace. Each group of burners is divided into two groups in the vertical direction. The first group of burners is called "primary air / thick coal powder" burner, and the second group of burners is called "primary air / light coal powder" burner. The invention can make the thermal load qHr of the wall surface of the burner area higher under the premise of satisfying the thermal power of the whole boiler, ensure the timely ignition of the anthracite pulverized gas flow and the stable combustion of the boiler without oil input and low load.

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