Comprehensive energy-saving method for boiler or industrial furnace and kiln

An industrial and kiln technology, applied in the field of comprehensive energy saving, can solve the problems of oxygen-enriched air combustion that cannot achieve energy saving effect, large blast and induced air volume, and inability to accurately adjust the air volume coordination, etc.

Inactive Publication Date: 2007-10-03
吴仲贤 +1
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AI Technical Summary

Problems solved by technology

[0003] When the boiler or kiln uses oxygen-enriched air with an oxygen content of more than 23% to support combustion, the amount of oxygen-enriched air used is relatively small, and the original blast volume and induced air volume of the boiler or kiln are relatively large, so that the added oxygen-enriched air Poor combustion support
If it is manually adjusted by the operator, it is impossible to accurately adjust the various air volumes.
Especially when the thermal load of the boiler or kiln changes, such as manually adjusting the fuel volume, ventilation volume, and heated medium volume of the boiler or kiln, it cannot be adjusted accurately with the thermal load change, resulting in insufficient oxygen-enriched air combustion. to the energy-saving effect

Method used

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  • Comprehensive energy-saving method for boiler or industrial furnace and kiln

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Effect test

Embodiment 1

[0009] The present invention is implemented in the boiler, and the control system is designed and installed according to the present invention. When the combustion-supporting oxygen-enriched air is added to the boiler furnace, the intelligent control system starts to adjust the combustion-supporting air volume and the original blower and induced draft fan, and detects the furnace temperature, heated medium (such as steam) temperature, flow, pressure, and exhaust gas temperature and other parameters. When the heat load increases and the amount of fuel increases, the intelligent control system will automatically increase the pressure of the combustion-supporting air, increase the linear velocity of the combustion-supporting air to make it greater than the smoke overnight, and use a frequency converter to properly adjust the induced air volume, and at the same time use the exhaust gas temperature The parameter is used as the second reference quantity for the adjustment of the ind...

Embodiment 2

[0011] The present invention is implemented in the chemical raw material sodium silicate molten pool furnace, and an automatic control system is designed and installed according to the present invention. When the combustion-supporting oxygen-enriched air is added to the hearth of the molten pool furnace, the intelligent control system detects the field parameters, and then starts to adjust the combustion-supporting air volume and the original blower, and detects parameters such as the furnace temperature, the temperature of the heated medium, and the exhaust gas temperature. When the heat load increases, the amount of fuel increases, and the intelligent control system automatically increases the combustion-supporting oxygen-enriched air pressure by 1.6KPa according to the amount of fuel increase. The parameter is used as the second reference quantity for adjusting the blast volume, so that the melting pool furnace can work in the optimal energy-saving area. Conversely, when th...

Embodiment 3

[0013] Implement the present invention in the cement rotary kiln, design and install the control system according to the present invention. In this system, according to the established adjustment model of the combustion conditions of the rotary kiln, under the adjustment of the automatic control system, the combustion-supporting oxygen-enriched air is added to the pulverized coal burner of the cement rotary kiln to reduce the original air volume of pulverized coal injection, so that The powdered coal sprayed out by the burner accelerates the combustion speed and burnout degree, improves the combustion intensity of the flame, and also reduces the formation of nitrogen oxides and reduces the NOx component in the exhaust gas of the rotary kiln. In the application of the new dry-process cement rotary kiln, the burner of the precalciner kiln must also be adjusted, and the secondary and tertiary air volumes are adjusted by the intelligent control system to ensure the special flame co...

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Abstract

The present invention is comprehensive energy-saving method for boiler and industrial furnace and kiln. The present invention adopts one system comprising an oxygen-rich air supply device, an in-site sensor, a data transmission device, an automatic intelligent controller and an executor in regulating air quantity, fuel quantity, heated medium, etc for boiler and industrial furnace and kiln, so as to reach comprehensive energy-saving effect. In condition of changing heat load, the system can regulate air quantity, fuel quantity, heated medium, etc to follow the heat load change for reaching excellent oxygen-rich air combustion supporting effect. The present invention has been applied practically.

Description

Technical field: [0001] The present invention is a comprehensive energy-saving method for boilers or industrial kilns. Specifically, when using oxygen-enriched air for combustion, by adjusting the original ventilation of the boiler or industrial kiln, it matches with the oxygen-enriched combustion air, and comprehensively adjusts the furnace fuel. It is an automatic control method that improves thermal efficiency and saves fuel. Background technique: [0002] Various methods of separating oxygen from air to obtain oxygen-enriched air, such as membrane separation method, partial pressure method, cryogenic method, etc., have been very mature, and the use of oxygen-enriched air as combustion-supporting air for boilers or industrial kilns has been proven. It can achieve good results, which is especially obvious in plateau anoxic areas. [0003] When the boiler or kiln uses oxygen-enriched air with an oxygen content of more than 23% to support combustion, because the amount of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N1/02F23N1/08F27D19/00
CPCY02E20/34
Inventor 吴仲贤邓卉戎李芃杨刚王文哲闵航
Owner 吴仲贤
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