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Spliting arranging method for new three area burner of tangential circle boiler

A technology of tangential combustion and burners, which is applied in the direction of burners, burners, and combustion methods for burning powder fuels. It can solve the problem of the large influence of pulverized coal airflow burnout, restricting the development of fuel staged low NOx combustion technology, and the inability to take into account denitrification effect and combustion efficiency, to achieve the effect of reducing NOx emissions and improving the uneven distribution of flame temperature

Inactive Publication Date: 2006-06-14
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing fuel staged combustion technology cannot do this, and it is helpless to use about 15% of the fuel volume as the reburning fuel; at the same time, the reburning zone is separated from the main combustion zone by a certain distance, and it is arranged on the top of the burner to face the coal. The burnout effect of the powder flow is very large
As a result, the fuel staged low NOx combustion technology cannot take into account the denitrification effect and combustion efficiency at the same time, which has become a fatal flaw in its development and seriously limits the development of fuel staged low NOx combustion technology

Method used

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  • Spliting arranging method for new three area burner of tangential circle boiler
  • Spliting arranging method for new three area burner of tangential circle boiler
  • Spliting arranging method for new three area burner of tangential circle boiler

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Referring to Fig. 3, the present embodiment has 5 layers of primary air nozzles (represented by numeral 1), 3 layers of secondary air nozzles (represented by numeral 2), 2 layers of top burn-off air nozzles (represented by numeral 3), and 2 layers of The body burns out the air nozzle (represented by numeral 4). Among them, the primary air nozzle, the secondary air nozzle and the top burn-off air nozzle are arranged at the existing positions at the four corners of the furnace, which are called the main burner, and the arrangement method from bottom to top is 2 / 1 / 2 / 1 / 2 / 1 / 1 / 1 / 3 / 3, the split overburning air nozzle is arranged somewhere in the middle of the horizontal direction of the 4 walls of the furnace wall ( figure 2 4 and 4 in Figure 3), called the auxiliary burner. Among them, the 5-layer burner nozzle (2 / 1 / 2 / 1 / 2) in the lower part of the main burner constitutes a stable combustion zone; the 3-layer primary air nozzle (1 / 1 / 1) and the 2-layer auxiliary burner in th...

Embodiment 2

[0045] Referring to Fig. 4, the present embodiment has 5 layers of primary air nozzles (represented by number 1), 3 layers of secondary air nozzles (represented by number 2), 2 layers of top burn-off air nozzles (represented by number 3), and 2 layers of sub-air nozzles. The body burns out the air nozzle (represented by numeral 4). Among them, the primary air nozzle, the secondary air nozzle and the top burn-off air nozzle are arranged at the existing positions at the four corners of the furnace, which are called the main burner, and their arrangement from bottom to top is 2 / 1 / 2 / 1 / 1 / 2 / 1 / 1 / 3 / 3, the split burn-off air nozzle is arranged somewhere in the middle of the horizontal direction of the 4 walls of the furnace wall ( figure 2 4 and 4 in Figure 4), called the auxiliary burner. Among them, the 5 layers of burner nozzles (2 / 1 / 2 / 1) in the lower part of the main burner form a stable combustion zone; the 3 layers of primary air nozzles and the 1 layer of secondary air nozzle...

Embodiment 3

[0047] Referring to Fig. 5, the present embodiment has 6 layers of primary air nozzles (represented by numeral 1), 3 layers of secondary air nozzles (represented by numeral 2), 2 layers of top burn-off air nozzles (represented by numeral 3), and 3 layers of sub-air nozzles. The body burns out the air nozzle (represented by numeral 4). Among them, the primary air nozzle, the secondary air nozzle and the top burn-off air nozzle are arranged at the existing positions at the four corners of the furnace, which are called the main burner, and the arrangement method from bottom to top is 2 / 1 / 2 / 1 / 2 / 1 / 1 / 1 / 1 / 3 / 3, the split burn-off air nozzle is arranged somewhere in the middle of the horizontal direction of the 4 walls of the furnace wall ( figure 2 4 and 4 in Figure 5), called the auxiliary burner. Among them, the 5-layer burner nozzle (2 / 1 / 2 / 1 / 2) in the lower part of the main burner constitutes a stable combustion zone; the 4-layer primary air nozzle (1 / 1 / 1 / 1) and the 3-layer auxi...

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Abstract

The invention discloses tangential firing boiler new three zones burner split arrangement type. The includes the following steps: dividing combustion process into three zones that stable combustion zone, combustion and reducing zone, and full combustion zone by gas coal type arrangement plus once wind centralizing arrangement plus fission OFA plus top OFA arrangement type; complementing combustion air in time by fission OFA arrangement; the deep hypoxia cryogenic combustion of the initial stage coal dust air flow and the deep fuel of the combustion and reducing zone are fractional combustion. This successfully solves the abuse that the current low NOx combustion technique denitrifying effect is bad. Secondary burn-out wind complementing type can greatly reduce the influence of the new three zones burner fission arrangement type on the combustion efficiency. Thus this can successfully solves the problem of taking account of the current NOx combustion technique and the combustion efficiency at the same time. It is the burner arrangement type with better denitrifying effect.

Description

technical field [0001] The invention relates to a boiler combustion system, in particular to a split arrangement of a new three-zone burner of a tangential combustion boiler. Background technique [0002] Almost all coal-fired boilers in power stations in my country have adopted low-NOx air staged combustion technology, but the application effect is not ideal. Among them, the NOx emissions of high-volatile coal-fired boilers can basically be controlled at 650mg / m 3 Around or lower, the NOx emission of low volatile coal-fired boilers is basically still at 1000mg / m 3 around or higher. From a technical point of view, this is related to the existing technical measures of low NOx air staged combustion technology. The existing technical measures fail to effectively control the excess air ratio at the initial stage of combustion, thus restricting the denitrification effect of the low NOx air staged combustion technology. On the other hand, deepening the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/32F23D1/02
Inventor 王春昌王月明蒋敏华
Owner XIAN THERMAL POWER RES INST CO LTD
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