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Concentric axial flow low nitrogen oxide sleeve combustor

A low-nitrogen oxide, concentric shaft technology, applied in the direction of burners, lighting and heating equipment, etc., can solve the problems of low-nitrogen combustion, etc., and achieve the effects of convenient installation and arrangement, strong ignition stability and high combustion efficiency

Inactive Publication Date: 2016-08-31
SHANGHAI POWER EQUIP RES INST
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, many industrial boilers adopt the mixed combustion method of gas-inferior-quality coal. The boiler adopts the mixed-firing method at the initial stage of ignition and low-load operation, and uses the method of purely burning inferior coal for high-load operation. At present, most coal-fired industrial boilers do not use low-quality coal. NO X burner, so there is still a gap in low-nitrogen combustion in the field of mixed combustion of gas and low-quality coal

Method used

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  • Concentric axial flow low nitrogen oxide sleeve combustor
  • Concentric axial flow low nitrogen oxide sleeve combustor
  • Concentric axial flow low nitrogen oxide sleeve combustor

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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] The present invention is based on following two basic principles:

[0026] 1. Swirl combustion method

[0027] The swirling jet has a forward axial velocity and a circumferential tangential velocity, so after leaving the nozzle and entering the space, the swirling flow expands forward in a spiral motion to form a radial flow shape. In the actual combustion process, it is affected by the furnace The effect of the wall is that the rotating airflow is closed, the expansion angle is relatively large, and there is a recirculation zone caused by negative pressure at the outlet. The maximum axial velocity of the swirling air falls very quickly, resulting in a shorter range. Due to the large expansion angle and the recirculation zone in the center, the swirling air flow at the burner nozzle has a stronger ability to entrain the s...

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Abstract

The invention provides a concentric axial flow low nitrogen oxide sleeve combustor characterized by comprising a main combustor and an over fire air mechanism arranged above the main combustor; the main combustor comprises a primary air powder airflow pipeline and a secondary air pipeline arranged outside the primary air powder airflow pipeline; the over fire air mechanism comprises coaxially arranged an inner direct current air pipe and an outer eddy flow air pipe; the gas-inferior coal co-combustion NOX combustor is simple in structure, convenient in installation, low in NOX generation amount, strong in ignite stability, and high in combustion efficiency.

Description

technical field [0001] The invention relates to a burner for co-combusting gas-inferior coal in an industrial coal-fired boiler, which is used for cleaning coal and reducing atmospheric NO X emissions. Background technique [0002] my country's industrial boilers are mainly coal-fired. By the end of 2012, there were 467,000 coal-fired industrial boilers in use, with a total capacity of 1.78 million steam tons and an annual consumption of about 700 million tons of raw coal, accounting for more than 18% of the country's total coal consumption. . The overall energy efficiency level of my country's coal-fired industrial boilers is low, and its actual operating efficiency is about 15 percentage points lower than the international advanced level, which has great energy-saving potential. At the same time, the emission intensity of coal-fired industrial boilers is relatively high and is an important source of pollution. The annual emissions of soot, sulfur dioxide, and nitrogen oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D17/00
CPCF23D17/005F23D2204/20
Inventor 何翔魏增涛周文台王克
Owner SHANGHAI POWER EQUIP RES INST
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