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Enriched multiple straight-through coal burners

A pulverized coal burner and enrichment technology, which is applied to burners, burners for burning powder fuel, combustion methods, etc., can solve the problems of difficult layout of large-capacity boilers, affecting the service life of nozzles, and high nozzle temperatures, and achieve maintenance. And easy to operate, eliminate slagging and high temperature corrosion, reduce the effect of reducing atmosphere

Inactive Publication Date: 2003-09-03
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this structure requires a large nozzle area, and it is difficult to arrange large-capacity boilers (units above 200MW); in addition, when the coal type changes greatly, it is easy to cause the temperature of the nozzle to be too high, which will affect the service life of the nozzle

Method used

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  • Enriched multiple straight-through coal burners
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  • Enriched multiple straight-through coal burners

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Embodiment Construction

[0011] Concrete structure and working principle of the present invention are described in detail below in conjunction with accompanying drawing:

[0012] Figure 1 is a schematic diagram of the layout of the burner in the four corners of the boiler furnace. The hypotenuse side of the nozzle 4 is arranged on the fire side 5, the straight side of the nozzle is on the back fire side 6, and the distance between the center line of the burner and the center of the furnace The installation deflection angle is determined by the imaginary cutting circle. The square garden joint head 1 connects the burner square channel and the primary air duct. figure 2 A schematic diagram of the burner structure. It includes a primary air square passage 3, a separation block 2 and a partition 8 arranged in the square passage, a burner nozzle 4, a wedge-shaped baffle 7 arranged in the nozzle and a zigzag multi-strand small nozzle 9 at the outlet of the nozzle ( As shown in Figure 3). Generally, 2-3 b...

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Abstract

A multi-concentration direct-flow coal powder burner for high-capacity boiler features that its 4 corners are tangently arranged, the wedged partition is installed in the concentrated airflow of nozzle, multiple small saw-tooth nozzles are arranged at the outlet of concentrated coal powder for guiding it to a high-temp region to form small flame, which is then used to ignite other coal powder airflow to form greate flame. Its advantages are high combustion stability, small size of nozzle, and less NOx exhaust.

Description

technical field [0001] The invention relates to a direct-flow pulverized coal burner, in particular to a pulverized coal thick-lean burner arranged tangentially at four corners, and belongs to the technical field of combustion equipment. Background technique [0002] For pulverized coal boilers in power stations, the realization of a rich-lean combustion technology (i.e., rich-poor powder combustion technology) has been proved in theory and practice to solve the problem of stable combustion in the furnace, realize low-load oil cut-off and peak-shaving, and reduce NOx in the furnace. X It is a good way to prevent slagging in the furnace and improve the adaptability of coal types. Most of the thick-lean combustion technology is to divide the pulverized coal airflow in the primary air duct into two streams, thick and thin, and send the thick pulverized coal airflow to the space where it is easy to catch fire (such as the high-temperature recirculation area or the fire side of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D1/00
Inventor 徐秀清曾瑞良
Owner TSINGHUA UNIV