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Flue gas desulphurization-denitration integrated device and method

A technology for desulfurization, denitrification and flue gas, which is applied in chemical instruments and methods, separation methods, and air quality improvement. problems, to achieve the effect of saving ozone consumption, low operating cost and small footprint

Inactive 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

CN103463978A added H on the basis of CN102327735A 2 o 2 Catalytic decomposition device that makes H 2 o 2 Decomposition produces OH, but this method uses many and complicated equipment outside the tower, occupies a large area, and increases investment and operating costs
However, the process also uses the main oxidant H 2 o 2 Injected into the flue, it is difficult to provide H at the flue 2 o 2 The most suitable conditions for oxidation, and this method will O 3 As an activator, O is underutilized 3 The advantages of strong oxidizing properties, while also the O 3 injected into the flue, O 3 Ineffective decomposition occurs under the influence of dust and temperature, resulting in the highest total denitrification efficiency of only about 60%

Method used

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Embodiment approach

[0105] 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 ...

Embodiment 1

[0146] Pic 4-1 A 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 desulfurization and denitrification integrated device of the present invention includes flue gas desulfurization and denitrification equipment 41 , ozone supply equipment 45 and hydrogen peroxide supply equipment 48 . The flue gas desulfurization and denitrification 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 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 a...

Embodiment 2

[0159] 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 desulfurization and denitrification integrated device of the present invention includes flue gas desulfurization and denitrification equipment 41 , ozone supply equipment 45 and hydrogen peroxide supply equipment 48 . The flue gas desulfurization and denitrification 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 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...

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Abstract

The invention discloses a flue gas desulphurization-denitration integrated device and method. The flue gas desulphurization-denitration integrated device comprises a flue gas desulphurization-denitration device, an ozone supplement device and a hydrogen peroxide supplement device. The flue gas desulphurization-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 desulphurization-denitration integrated device and method are suitable for desulphurization-denitration integrated treatment on SO2- and 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 desulphurization-denitration integrated method has a high operation cost, utilizes complex equipment and has low denitration efficiency.

Description

technical field [0001] The invention relates to an integrated device and method for flue gas desulfurization and denitrification, in particular to an integrated device and method for simultaneously removing sulfur dioxide and nitrogen oxides in flue gas. Background technique [0002] Given sulfur dioxide (SO 2 ) and nitrogen oxides (NO X ) adverse effects on the atmospheric environment and damage to people's health, the Ministry of Environmental Protection will control SO 2 and NO X The emission of pollution is listed as a key pollution control work, and the relevant environmental protection standards are becoming increasingly stringent. For SO 2 and NO X Separate removal treatment requires the introduction of multiple sets of equipment, high investment and large land occupation. Therefore, in recent years, various new control technologies for multi-pollutants in flue gas have emerged continuously. on SO 2 and NO X During removal, NO X removal than SO 2 much more d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/60
CPCY02A50/20
Inventor 童裳慧
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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