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Energy-saving method for denitrogenation of horizontal chained coal fired boiler

A technology for coal-fired boilers and boilers, applied in the field of coal-fired boilers, can solve the problems of complex equipment structure, difficulty in realization, and high cost of nitrogen removal.

Inactive Publication Date: 2008-11-12
北京布鲁斯盖环保科技发展有限公司
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AI Technical Summary

Problems solved by technology

Currently, for NO x The control technology is mainly to remove NO in the flue gas x , when using this traditional denitrification method, the equipment structure is complex and the equipment investment is large. In the process of nitrogen removal, other auxiliary substances need to be added to the flue gas, and the cost of nitrogen removal is relatively high.
For small coal-fired boilers, it is more difficult to achieve with traditional denitrification methods

Method used

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  • Energy-saving method for denitrogenation of horizontal chained coal fired boiler
  • Energy-saving method for denitrogenation of horizontal chained coal fired boiler

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Embodiment Construction

[0017] The horizontal chain coal-fired boiler uses the chain to send the coal into the furnace. Under the chain, the blower is used to provide the air required for coal combustion from the outside of the furnace to the main furnace. It is connected with the main furnace as a heat exchange chamber. The flue gas pipe and the water pipe on the flue gas pipe, the high-temperature flue gas output from the main furnace, transfers heat to the water in the water pipe through the flue gas pipe. The cross-sectional area of ​​the main furnace facing the outlet of the heat exchange chamber will suddenly and gradually decrease. The outlet of the main furnace is trumpet-shaped to reduce the cross-section of the exhaust outlet of the main furnace, so as to accelerate the high-temperature flue gas entering the flue gas pipe in the heating chamber. flow rate. There is a smoke exhaust port on the heating chamber of the boiler, the outlet of the flue gas pipe is connected to the smoke exhaust po...

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Abstract

The invention discloses a denitrogenation energy-saving method of horizontal chain coal-fired boiler, which comprises: (1) feeding the smoke discharged from the smoke channel of boiler into the fan of boiler, and via adjusting the rate between the smoke and the fresh air to control the oxygen content and control the burning speed of coal, therefore, it can realize the control on the temperature of furnace; (2) guiding fresh air into the interface between the main furnace and the heat exchanging chamber, or the part of smoke channel whose temperature is not less than 700Deg. C, to mix the fresh air and the boiler gas discharged from the main furnace, and using the oxygen of fresh air to fully burn the fuel gas of boiler gas. The inventive method can effectively reduce the discharged gas amount of smoke and the NOx content of smoke, to realize the utilization on the left heat of part smoke, and the environment-friendly discharge of industrial boiler.

Description

technical field [0001] The invention relates to the field of coal-fired boilers, in particular to a denitrification and energy-saving technology for horizontal chain coal-fired boilers. Background technique [0002] During the combustion process of coal-fired boilers, the combustion products will contain NO x and other hazardous substances, if will carry NO x The combustion exhaust gas is directly discharged into the air, which will cause great harm to the natural environment. Currently, for NO x The control technology is mainly to remove NO in the flue gas x When using this traditional denitrification method, the equipment structure is complex and the equipment investment is large. In the process of nitrogen removal, other auxiliary substances need to be added to the flue gas, and the cost of nitrogen removal is relatively high. For small coal-fired boilers, it is even more difficult to use traditional denitrification methods. Contents of the invention [0003] Aimin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/56F23L9/00
Inventor 姜宗林郝德麟刘杰克
Owner 北京布鲁斯盖环保科技发展有限公司
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