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Sintering flue gas energy-saving type denitrification system

A sintering flue gas, energy-saving technology, applied in the energy industry, climate sustainability, energy efficiency improvement, etc., can solve the problems of high operating costs, low denitrification efficiency, etc., and achieve the effect of saving gas

Active Publication Date: 2015-07-22
孙慕文
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Problems solved by technology

"A sintering denitrification system and its method for removing nitrogen oxides" (CN103157356A), the method adopted is that during the sintering process, the wind box flue gas with high concentration of nitrogen oxides in the sintering machine is drawn out, and by adding natural gas, it returns to the The corresponding sintered material surface chemically reacts with the nitrogen oxides in the flue gas to achieve denitrification. This method has high operating costs and low denitrification efficiency

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  • Sintering flue gas energy-saving type denitrification system

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like figure 1 As shown, a sintering flue gas energy-saving denitrification system of the present invention mainly includes a sintering machine, an annular cooler, a large flue (2), an intermediate circulation fan (3), a separation valve (4) in the middle and front section of the large flue, a sintering Air cover in the middle section of the machine (8), air cover in the rear section of the sintering machine (10), denitrification flue (13), separation valve in the middle and rear section of the large flue duct (14), medium and high temperature dust collector (15), denitration device (17), Heat exchanger (18), electrostatic precipitator (21), main exhaust fan (20), install the separation valve (4) in the front section of the large flue passage and the separation valve in the middle and rear section of the large flue passage ( 14), the large flue is divided into t...

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Abstract

The invention discloses a sintering flue gas energy-saving type denitrification system. The sintering flue gas energy-saving type denitrification system comprises a denitrification device, a heat exchanger, a circulating fan and an ammonification device. The sintering flue gas energy-saving type denitrification system fully uses waste heat of a sintering process, the sintering flue gas efficient denitrification is achieved, and the flue gas waste heat is recovered. The sintering flue gas energy-saving type denitrification system can greatly reduce nitrogen oxide discharge amount of sintering flue gas and improve the waste heat recovery level of the sintering process.

Description

technical field [0001] The invention relates to a sintering process environmental protection and energy-saving system, in particular to an energy-saving denitrification process and device used in the sintering process of iron and steel enterprises. Background technique [0002] At present, in the process of iron and steel production, the energy consumption of the sintering process accounts for about 12% of the total energy consumption, ranking second only to the ironmaking process. The flue gas discharged from the sintering process contains a large amount of nitrogen oxides. According to According to the emission standard of air pollutants in steel and pellet industry (GB28662-2-12), sintering flue gas needs to be denitrified. At present, the mature denitrification process is SCR method, the required flue gas temperature is 300-380°C, but the sintered flue gas is 100-150°C, so if the sintered flue gas is directly denitrified, a large amount of coal gas is required to heat th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F27D15/02
CPCY02P10/25Y02P80/15
Inventor 孙慕文
Owner 孙慕文
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