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Combustion technology of low nitrogen oxide

A combustion method and technology for pulverized coal boilers, which are applied in combustion methods, combustion using lump fuel and powder fuel, combustion using liquid fuel and powder fuel, etc., can solve the problem of not considering the control of NOX, etc., to avoid slagging Corrosion problem, low-load stable combustion, and NOx reduction effects

Inactive Publication Date: 2008-11-19
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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The low NO of the pulverized coal boiler provided by the invention x The schematic diagram of the combustion method is shown in figure 1 shown. It is composed of furnace 1, burner 2 and tuyere 3, and there are low NO in the four corners of furnace 1 x Burner LNB2 and tuyere 3, furnace 1 is divided into three areas from bottom to top: main combustion zone 11, reduction zone 12 and burnout zone 13, the four corners of the main combustion zone 11 furnace are provided with burners for feeding pulverized coal airflow in layers 2. Schematic diagram of boiler tangential combustion 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 furnace in the burnout area 13, only the tuyere 4 for feeding the burnout air is provided, and the air volume of about 40% of the secondary air is led to the top of the whole set of burners 2 and ...

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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 Patents(China)
IPC IPC(8): F23C5/32
Inventor 庞开宇
Owner DONGDIAN BURNING APP LIAONING
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