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Combustion technology of low nitrogen oxide

A combustion technology, a technology of the main combustion zone, applied in the direction of the combustion chamber, combustion method, combustion equipment, etc., can solve the problems such as NOX control, avoid slagging and corrosion problems, realize low-load stable combustion, and reduce NOX effects

Inactive Publication Date: 2006-04-12
DONGDIAN BURNING APP LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These units, especially units with a capacity of 200MW and below, have basically not considered the control of NO due to the limitation of historical conditions. X measures, now facing the situation of a large amount of payment and even huge charges

Method used

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  • Combustion technology of low nitrogen oxide
  • Combustion technology of low nitrogen oxide
  • Combustion technology of low nitrogen oxide

Examples

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Embodiment 1

[0023] The low NO provided by the present invention X Schematic diagram of the combustion technology figure 1 shown. It consists of a furnace (1), a burner (2), and a tuyere (3). There are low NO X The burner LNB (2) and the tuyere (3), the furnace (1) is divided into three areas from bottom to top: the main combustion zone (11), the reduction zone (12) and the burnout zone (13), and the main combustion zone (11 ) The four corners of the furnace are provided with burners (2) that feed the pulverized coal airflow according to the layers. The schematic diagram of the tangential combustion of the boiler is as follows figure 2 As shown, the tuyere (3) for secondary air is set above and below each layer of burners (2), and the horizontal layout of the secondary air is shown in image 3 As shown, on the four corners of the burner hearth of the burnout zone (13), only the tuyeres (4) for feeding the burnt out air are set, and the air volume of about 40% of the secondary air is le...

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PUM

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Abstract

A low-Nox combustion technology features that the combustion box is divided into primary combustion region, reduction region and burning off region from bottom to top. In the primary combustion region, the multi-layer horizontal coal powder combustion technique is used. In the reduction region the under-oxygen reduction technique is used. The burn0off air is fed into the burning off region. The jet direction of the secondary wind among each two burner layers is deflected clockwise by 10-15 deg. relative to the jet direction of primary wind and coal powder stream. The excessive coefficient of air in reduction region is 1.0. The horizontal direction of burn-off windjet is deflected anticlockwise by 5-10 deg. relative to the jet direction of primary wind. Its advantages are stable and uniform combustion, and low release of Nox.

Description

Technical field: [0001] The present invention relates to combustion technology. Background technique: [0002] Coal resources occupy an important position in China's primary energy composition, accounting for about 90% of the proven mineral energy resources. According to experts' prediction, by 2010, coal will still account for about 60% of China's primary energy consumption, and by 2050, coal will account for about 50%. There will be no fundamental changes in time. [0003] As of 2000, the area of ​​acid rain in my country has accounted for 30% of the country's land area, and only 1 / 3 of the cities have reached the air quality standard. 70% of the rivers flowing through the cities have been polluted to varying degrees. China's coal-based energy consumption structure has caused serious deterioration of the quality of the atmospheric environment and paid a high price in the economy. The use of clean energy to prevent the deterioration of the ecological environment has becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C1/12F23C7/00F23C6/04F23C3/00
Inventor 庞开宇
Owner DONGDIAN BURNING APP LIAONING
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