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Flue gas denitration device and method

A flue gas and denitrification technology, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of low denitrification efficiency, high operation cost of denitrification process, complex equipment, etc., and achieves small footprint and low operation cost. Low and high economical effect

Active Publication Date: 2015-09-30
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 denitration device and method
  • Flue gas denitration device and method
  • Flue gas denitration device and method

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Embodiment approach

[0099] The flue gas oxidation step of the present invention is to utilize ozone and hydrogen peroxide to synergistically oxidize the low-valent nitrogen oxides in the flue gas in the ozone spray oxidation reaction layer and the hydrogen peroxide spray oxidation reaction layer, and form high-valent nitrogen oxides. Preferably, the flue gas oxidation step of the present invention includes: in the ozone spray oxidation reaction layer, ozone is sprayed downward through an ozone atomizing spray component; in the hydrogen peroxide spray oxidation reaction layer, through hydrogen peroxide atomization spray The shower part sprays hydrogen peroxide downward. The atomization spray process used in the flue gas oxidation step is not particularly limited, and those well-known in the art can be used. According to an embodiment of the present invention, the flue gas oxidation step preferably uses a stainless steel nozzle to inject ozone and hydrogen peroxide. The principle of co-oxidation of...

Embodiment 1

[0137] Pic 4-1 It shows a schematic diagram of the apparatus of Embodiment 1 of the present invention. It can be seen from the figure that the flue gas denitration device of the present invention includes a flue gas inlet 411, a flue gas denitrification device 41, an ozone supply device 45, a hydrogen peroxide supply device 48, and a mist removal device 43. The flue gas denitration equipment 41 includes an ozone spray oxidation reaction layer 44, a hydrogen peroxide spray oxidation reaction layer 47, an absorption spray area 42 and a slurry storage area 410, wherein the ozone spray oxidation reaction layer 44 and the hydrogen peroxide spray oxidation reaction layer 47 All are 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 a...

Embodiment 2

[0150] Figure 4-2 It shows a schematic diagram of the apparatus of Embodiment 2 of the present invention. It can be seen from the figure that the flue gas denitration device of the present invention includes a flue gas inlet 411, a flue gas denitrification device 41, an ozone supply device 45, a hydrogen peroxide supply device 48, and a mist removal device 43. The flue gas denitration equipment 41 includes an ozone spray oxidation reaction layer 44, a hydrogen peroxide spray oxidation reaction layer 47, an absorption spray area 42 and a slurry storage area 410, wherein the ozone spray oxidation reaction layer 44 and the hydrogen peroxide spray oxidation reaction layer 47 All are 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 se...

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Abstract

The invention discloses a flue gas denitration device and method. The flue gas denitration device comprises a flue gas denitration device, an ozone supplement device and a hydrogen peroxide supplement device. The flue gas denitration device comprises an ozone spray oxidation reaction layer, a hydrogen peroxide spray oxidation reaction layer, an absorption spray zone and a slurry storage zone. The ozone spray oxidation reaction layer and the hydrogen peroxide spray oxidation reaction layer are arranged in the absorption spray zone. The flue gas denitration device and method are suitable for denitration integrated treatment on NOX-containing flue gas produced by a coal-fired boiler, a steel sintering machine, pelletizing and an industrial kiln, and solve the problem that the existing flue gas denitration method has a high operation cost, utilizes complex equipment and has low denitration efficiency.

Description

Technical field [0001] The invention relates to a flue gas denitration device and method, in particular to a device and method for removing nitrogen oxides in flue gas. Background technique [0002] Given the nitrogen oxides (NO X ) For adverse effects on the atmospheric environment and damage to people’s health, the Ministry of Environmental Protection will control coal-fired boilers, industrial kilns, and steel sintering pellet equipment NO X The emission is listed as the third key pollution control task after flue gas dust removal and desulfurization. Relevant environmental protection standards are becoming stricter, 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 denitration 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 seco...

Claims

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Application Information

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