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System and method for flue gas denitration and white smoke plume-removal of sintering machine

A sintering machine and flue gas technology, which is applied in the field of flue gas purification, can solve the problem of not being able to find the temperature window, and achieve the effect of improving performance and efficiency

Pending Publication Date: 2019-02-12
武汉立为工程技术有限公司
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Problems solved by technology

90% of the desulfurization projects adopt the wet limestone-gypsum method, and the traditional selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) processes cannot find a suitable temperature window

Method used

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  • System and method for flue gas denitration and white smoke plume-removal of sintering machine

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Embodiment Construction

[0029] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0030] like Figure 1 to Figure 2 As shown, a system for flue gas denitrification and whitening of sintering machine provided by the embodiment of the present invention includes GGH heat exchange system 1, hot stove mixing system 2, ammonia water direct injection system 3 and SCR reaction system 5. The GGH exchange system The raw flue gas inlet 13 at the bottom of the thermal system 1 is connected to the desulfurization tower 6, the raw flue gas outlet 11 at the top of the GGH heat exchange system 1 is connected to the hot blast stove mixing system 2, and the other end of the hot blast stove mixing system 2 is connected to the ammonia water direct Injection system 3, the other end of the ammonia water direct injection syst...

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Abstract

The invention discloses a system and a method for flue gas denitration and white smoke plume-removal system of a sintering machine. The system comprises a GGH (gas gas heater) heat exchange system, ahot blast stove mixing system, an ammonia water direct spraying system and an SCR (selective catalytic reduction) reaction system. The method is based on the system. The system and the method have theadvantages that a denitration technology and a system thereof are designed on the basis of an original desulfurizing system for flue gas, so that the denitration technology and the equipment adoptedthereof can be organically combined into a complete technology system; by designing the structure of the equipment adopted by the denitration technology and controlling the installation parameters, the temperature requirement superior to that required by the denitration technology can be met, so that the overall denitration property and efficiency are improved; while the oxynitride is removed, thewhite smoke plume can be eliminated.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a system and method for denitrification and whitening of flue gas from a sintering machine. Background technique [0002] At present, the main methods of flue gas denitrification in China include selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR), wet complexation absorption technology, liquid phase oxidation-absorption technology, gas phase oxidation-absorption technology, etc., among which The first two methods are widely used in power plants, cement and other industries. However, due to the high reaction window temperature (at least above 300°C), and the sintering (pellet) flue gas is different from the power plant flue gas, there is no high-temperature section, and the temperature is below 200°C, so SCR and SNCR technologies are used in metallurgy (sintering and Pellet) industry application is very difficult. [0003] At present, sin...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/56
CPCB01D53/8631B01D53/90B01D2251/2062B01D2258/0283
Inventor 张新敏候奎
Owner 武汉立为工程技术有限公司
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