Heat accumulating type steel ladle baking system capable of remarkably reducing NOX (nitrogen oxide) and baking method

A baking method and regenerative technology, applied in casting melt containers, metal processing equipment, casting equipment, etc., can solve problems such as pollution and large pollutant emissions, and achieve cost reduction, uniform furnace temperature, and smoke exhaust. The effect of temperature reduction

Inactive Publication Date: 2013-10-16
SHANGHAI BAOSTEEL ENERGY TECH
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  • Abstract
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Problems solved by technology

[0004] The object of the present invention is to provide a kind of can significantly reduce NO X regenerative ladle baking system to solve the NO problem of the regenerative combustion system in the prior art X Large amount of pollutant discharge, leading to serious technical problems of pollution
[0005] Another object of the present invention is to provide the baking method of the above-mentioned regenerative ladle baking system, to solve the NO problem of the regenerative combustion system in the prior art. X Large amount of pollutant discharge, leading to serious technical problems of pollution

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  • Heat accumulating type steel ladle baking system capable of remarkably reducing NOX (nitrogen oxide) and baking method
  • Heat accumulating type steel ladle baking system capable of remarkably reducing NOX (nitrogen oxide) and baking method

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Embodiment Construction

[0026] The present invention adopts a combustion method combining regenerative combustion and rich-lean combustion, which saves energy and reduces NO X The principle of emission is as follows.

[0027] As far as the regenerative combustion method is concerned, the temperature in the furnace is very uniform and the fuel is fully burned, which can greatly reduce the exhaust gas temperature from above 1000°C to below 150°C, fully recover heat, improve production and the surrounding environment, and reduce The heat loss of the flue gas is reduced, and the combustion rate of the combustion is increased, which can save energy and prolong the service life of the ladle.

[0028] As far as the rich-lean combustion method is concerned, it reduces NO by reducing the combustion temperature X production, thereby reducing NO X emissions. The reduction of the combustion temperature comes from two reasons: on the one hand, the excess air acts as a dilution effect, and on the other hand, th...

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Abstract

The invention provides a heat accumulating type steel ladle baking system capable of remarkably reducing NOX and a baking method. The heat accumulating type steel ladle baking system capable of remarkably reducing NOX comprises a steel ladle, at least two combustors, a fuel gas subsystem, a combustion air system, a smoke exhaust subsystem, an air-fuel gas reversing valve and a control subsystem, wherein a heat retainer, at least one concentrated combustion nozzle and at least one light combustion nozzle are arranged in each combustor; and during baking, the fuel gas sprayed out of the concentrated combustion nozzles combusts concentratedly, and simultaneously, the fuel gas sprayed out of the light combustion nozzles combusts lightly. Compared with the prior art, the heat accumulating type combustion is combined with the concentrated combustion and the light combustion, so that the temperature in a furnace is very uniform, NOX pollutants are prevented from being generated, the maximum reduction amount can be higher than 70%, and the problem of high pollution due to the combustion is completely solved by virtue of the combustion manner.

Description

technical field [0001] The invention relates to the technical field of ladle baking, in particular to a combination of regenerative combustion and rich-lean combustion, which can save energy and significantly reduce NO X The regenerative ladle baking system and baking method. Background technique [0002] At present, the regenerative combustion system is generally used for ladle baking. This kind of combustion system has high thermal efficiency and can save energy, but there is NO X Large amount of pollutant discharge, serious pollution defects. [0003] According to Zeldovich's thermal NO X generative theory, NO X The amount of formation is mainly related to the combustion temperature, and basically has an exponential relationship. According to this principle, to reduce NO X To increase the amount of production, it is necessary to reduce the combustion temperature, and the existing regenerative combustion method can preheat the gas and air to 1000°C respectively. Usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/01
Inventor 李雪刘咏梅王芳曹先常潘金荣
Owner SHANGHAI BAOSTEEL ENERGY TECH
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