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Composite type multifunctional straight-flow combustor

A multi-functional, burner technology, applied in the direction of burners, burners burning powder fuel, combustion methods, etc., can solve the problems of affecting combustion stability, large rotational momentum of secondary air, and reducing combustion efficiency, etc., to achieve low flying The effects of ash slag combustible content, low nitrogen oxide emissions, and wide application range of coal quality

Inactive Publication Date: 2005-11-16
甘肃省电力试验研究所 +1
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  • Claims
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AI Technical Summary

Problems solved by technology

At present, in order to prevent slagging, some boilers adopt a low heat load of the furnace, but this leads to an increase in the cost of the boiler and a reduction in combustion efficiency; The large rotational momentum of the wind and the turbulent dispersion of coal powder particles lead to the concentric reverse shear system is still prone to slagging when burning coal with a very low ash melting point and strong slagging tendency, and it is easy to affect the combustion stability

Method used

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  • Composite type multifunctional straight-flow combustor
  • Composite type multifunctional straight-flow combustor
  • Composite type multifunctional straight-flow combustor

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Embodiment Construction

[0009] The composite multi-functional direct-flow burner has performance regulating air III nozzle 5, secondary air nozzle 4, primary air nozzle 1 with coal powder level concentration on the upper and lower sides and back fire side tapered, performance regulating air II nozzle 3, upper and lower sides and back fire side The primary air nozzle 1 and the secondary air nozzle 4 of the pulverized coal level density that gradually shrinks on the back fire side, and the primary air nozzle 1 of the pulverized coal level density that gradually shrinks on the upper and lower sides and the back fire side are provided with performance adjustment air I nozzle 2 on the back fire side, The primary air nozzle 1 axis deviates from the secondary air nozzle 4 axis, the performance adjustment air II nozzle 3 adopts a folding nozzle, and a part of the flow channel is bent to the side of the water cooling wall.

[0010] The taper angle of the primary air nozzle 1 is 2-15 degrees, the angle between ...

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Abstract

The invention discloses a compound multifunctional DC burner, containing in turn performance adjusting wind spout III, secondary wind spout, coal powder horizontal shade primary wind spout, performance adjusting wind spout II, coal powder horizontal shade primary wind spout, and secondary wind spout, there is a performance adjusting wind spout I on the against-fire side of the primary wind spout, the axes of the primary wind spout and performance adjusting wind spout III drift off that of the secondary wind spout and lean to the facing-fire side, and the performance adjusting wind spout II folds toward water-cooled wall from parts of the runners of the secondary wind spout. It has advantages of wide coal applied range, preventing water-cooled wall from clogging (coking), high-temperature corrosion resistance, low load stable combustion, low-nitrogen oxide discharge, self-adjusting performance, etc.

Description

technical field [0001] The invention relates to a composite multifunctional direct-flow burner. Background technique [0002] Furnace slagging accidents often occur in pulverized coal combustion boilers due to reasons such as coal type, furnace structure and combustion system, which affect the safe and economical operation of the boiler. Especially for boilers burning coal with low ash melting point and strong slagging tendency, slagging accidents are especially prone to occur. At present, in order to prevent slagging, some boilers adopt a low heat load of the furnace, but this leads to an increase in the cost of the boiler and a reduction in combustion efficiency; The large rotational momentum of the wind and the turbulent dispersion of pulverized coal particles lead to the slagging of the concentric reverse tangential system when burning coal with a very low ash melting point and a strong slagging tendency, and it is easy to affect the combustion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/00
Inventor 孙国俊周昊岑可法
Owner 甘肃省电力试验研究所
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