Low-nitrogen oxide combustion technique and device

A low-nitrogen oxide, high-tech technology, applied in the direction of burners, combustion methods, combustion equipment, etc., can solve the problems of exhaust gas in the furnace, additional costs, oxidant mixing, etc., to reduce wear and maintenance costs, and reduce production costs , The effect of reducing the exhaust gas potential

Inactive Publication Date: 2008-10-29
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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  • Abstract
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Problems solved by technology

[0003] However, this conventional combustion has the major disadvantage that the furnace exhaust gas circulating in the furnace plant is not completely mixed with the oxidizing agent, so that the regulated emission of nitrogen oxides in the exhaust gas can on...

Method used

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  • Low-nitrogen oxide combustion technique and device
  • Low-nitrogen oxide combustion technique and device
  • Low-nitrogen oxide combustion technique and device

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Embodiment Construction

[0047] The furnace installation as shown in Figure 1 comprises a refractory lining 1 surrounding the combustion chamber with exhaust gas openings 19 and a chimney 2 for exhausting the furnace exhaust gas, as well as ducts 3 and a burner module 4 with a burner 5 passing through The pipe 7 is connected to the injector 6 and to a heat exchanger 8 arranged in the chimney 2 .

[0048] When the furnace exhaust gas flowing out of the combustion chamber through the exhaust gas opening 19 flows around the heat exchanger 8, it is first cooled and then flows out of the furnace equipment through the chimney 2.

[0049] Gaseous oxygen used as oxidant at a temperature from -20° C. to 40° C. and a pressure from 0.2 to 40 bar flows into the heat exchanger 8 through the inlet 9 .

[0050] The heat exchanger 8 is designed as a recuperator or regenerator, the oxygen flowing through the heat exchanger 8 is heated by the furnace exhaust gas flowing around the heat exchanger 8, and flows through th...

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Abstract

The invention relates to a process and an apparatus for low-NOx combustion with at least one burner (5) using fuel and oxidizing agent and/or furnace off-gases and/or carbon dioxide and/or steam. The low-NOx combustion according to the invention can be used in conventional melting and holding furnaces, in particular in aluminium holding furnaces or rotary drum furnaces and glass-melting furnaces,with the potential for considerable economies to be made.

Description

technical field [0001] The present invention relates to a process and device for low nitrogen oxide combustion using fuel and oxidant and / or furnace exhaust gas and / or carbon dioxide and / or steam. Background technique [0002] In the known low-NOx combustion, the furnace exhaust gas drawn in by the blower surrounds the burner flame, thereby reducing the flame temperature and thus the heat emission of NOx. [0003] However, this conventional combustion has the major disadvantage that the furnace exhaust gas circulating in the furnace plant is not completely mixed with the oxidant, so that the prescribed emissions of nitrogen oxides in the exhaust gas can only be achieved at additional cost. [0004] With the known low NOx combustion, high investment is unavoidable, and additional costs are required for maintenance of equipment, especially heavy-duty blowers and piping. Additionally, external energy is required to operate the blower. Contents of the invention [0005] It i...

Claims

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Application Information

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IPC IPC(8): F23C9/08F23L7/00F23L15/04
CPCY02E20/344F23L7/005C03B5/235F23L15/04Y02E20/348F23C2900/09002F23C9/08F23D2900/00004F23L7/007Y02E20/34F23C9/006F23C9/06F23C7/06F23J11/00
Inventor H·克德尔L·巴克斯M·阿登多夫
Owner LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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