Flue gas denitrification device and method

A flue gas and denitrification technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of low denitration efficiency, high operation cost of denitration process, complicated equipment, etc., and achieve small footprint and operating cost. Low and high economical effects

Active Publication Date: 2018-06-19
ZHONGJING ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device and method of the present invention are especially suitable for coal-fired boilers, iron and steel sintering machines, pellets, industrial kilns, etc. X The denitrification treatment of flue gas can solve the problems of high operating cost, complicated equipment and low denitrification efficiency of the current flue gas denitrification process

Method used

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  • Flue gas denitrification device and method
  • Flue gas denitrification device and method
  • Flue gas denitrification device and method

Examples

Experimental program
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Effect test

Embodiment approach

[0099]The flue gas oxidation step of the present invention is to use ozone and hydrogen peroxide to synergistically oxidize low-valent nitrogen oxides in the flue gas in the ozone spray oxidation reaction layer and hydrogen peroxide spray oxidation reaction layer to form high-valent nitrogen oxides. Preferably, the flue gas oxidation step of the present invention includes: in the ozone spray oxidation reaction layer, spray ozone downward through the ozone atomization spray part; in the hydrogen peroxide spray oxidation reaction layer, spray The shower unit sprays hydrogen peroxide downwards. The atomization and spraying process used in the flue gas oxidation step is not particularly limited, and those well known in the art can be used. According to one embodiment of the present invention, the flue gas oxidation step preferably uses stainless steel nozzles to spray ozone and hydrogen peroxide. The synergistic oxidation principle of ozone and hydrogen peroxide is as described a...

Embodiment 1

[0137] Pic 4-1A schematic diagram of the device of Example 1 of the present invention is shown. It can be seen from the figure that the flue gas denitrification device of the present invention includes a flue gas inlet 411 , flue gas denitrification equipment 41 , ozone supply equipment 45 , hydrogen peroxide supply equipment 48 and demister equipment 43 . Flue gas denitrification equipment 41 comprises ozone spray oxidation reaction layer 44, hydrogen peroxide spray oxidation reaction layer 47, absorption spray area 42 and slurry storage area 410, wherein, ozone spray oxidation reaction layer 44 and hydrogen peroxide spray oxidation reaction layer 47 They are all located in the absorption spray area 42. The absorption spray area 42 includes a first absorption spray layer 413 , a second absorption spray layer 414 and a third absorption spray layer 415 . The hydrogen peroxide spray oxidation reaction layer 47 is located between the first absorption spray layer 413 and the se...

Embodiment 2

[0150] Figure 4-2 A schematic diagram of the device of Example 2 of the present invention is shown. It can be seen from the figure that the flue gas denitrification device of the present invention includes a flue gas inlet 411 , flue gas denitrification equipment 41 , ozone supply equipment 45 , hydrogen peroxide supply equipment 48 and demister equipment 43 . Flue gas denitrification equipment 41 comprises ozone spray oxidation reaction layer 44, hydrogen peroxide spray oxidation reaction layer 47, absorption spray area 42 and slurry storage area 410, wherein, ozone spray oxidation reaction layer 44 and hydrogen peroxide spray oxidation reaction layer 47 They are all located in the absorption spray area 42. The absorption spray area 42 includes a first absorption spray layer 413 , a second absorption spray layer 414 and a third absorption spray layer 415 . The ozone spray oxidation reaction layer 44 is located between the first absorption spray layer 413 and the second abs...

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PUM

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Abstract

The invention discloses a flue gas denitrification device and method. The flue gas denitrification device of the present invention includes flue gas denitrification equipment, ozone supply equipment and hydrogen peroxide supply equipment, etc., wherein, the flue gas denitrification equipment includes ozone spray oxidation reaction layer and hydrogen peroxide spray oxidation reaction layer, absorption spray zone and slurry storage zone, the ozone spray oxidation reaction layer and the hydrogen peroxide spray oxidation reaction layer are all set in the absorption spray zone. The flue gas denitrification device and method of the present invention are suitable for the denitrification treatment of flue gas containing NOX such as coal-fired boilers, steel sintering machines, pellets, industrial kilns, etc., and can solve the problems of high operating cost, complicated equipment and low denitrification efficiency of the current flue gas denitrification process. Not a high question.

Description

technical field [0001] The invention relates to a flue gas denitrification device and method, in particular to a device and method for removing nitrogen oxides in flue gas. Background technique [0002] Given that nitrogen oxides (NO X ) adverse effects on the atmospheric environment and damage to people's health, the Ministry of Environmental Protection will control the NO X Emissions of pollutants are listed as the third key pollution control work after flue gas dust removal and desulfurization. Relevant environmental protection standards are becoming increasingly stringent, from the previous 400mg / Nm 3 (general area), 200mg / Nm 3 (Key areas) increased to 200mg / Nm 3 、100mg / Nm 3 . [0003] At present, the mainstream denitrification technology is selective catalytic reduction denitrification technology (SCR) or selective non-catalytic reduction denitrification technology (SNCR). The SCR method has high denitrification efficiency and low secondary pollution, but the equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/86B01D53/56
Inventor 童裳慧
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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