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Flue gas treatment system and flue gas treatment method for stepped ozone oxidation

A flue gas treatment system, ozone oxidation technology, applied in the direction of gas treatment, chemical instruments and methods, separation methods, etc., can solve problems such as difficult and increase operating costs, the risk of ozone escape, to avoid secondary pollution and reduce ozone The effect of input amount and complete response

Pending Publication Date: 2020-02-28
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before sintering flue gas desulfurization, it is generally at 130-200°C. Further increasing the amount of ozone will not only increase the operating cost and the risk of ozone escape, but also it is difficult to ensure the formation of N at a higher yield. 2 o 5

Method used

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  • Flue gas treatment system and flue gas treatment method for stepped ozone oxidation

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Effect test

Embodiment 1

[0077] This embodiment provides a flue gas treatment method of cascade ozonation, using a flue gas treatment system provided by a specific embodiment to perform cascade ozonation on the flue gas. Described flue gas treatment method comprises:

[0078] (I) The ozone generated by the ozone generator 1 is proportionally distributed to different ozone injection devices through the ozone distribution device 2, and the ozone injection amount distributed by the ozone distribution device 2 to each ozone injection device along the sequence of contact between the flue gas and ozone The gradient decreases, specifically, the ozone distributed to the primary ozone injection device 4 by the ozone distribution device 2 and the NO in the flue gas x The molar ratio is 0.8:1, the ozone distributed by the ozone distribution device 2 to the primary ozone injection device 5 and the NO in the flue gas x The molar ratio is 0.6:1, the ozone distributed by the ozone distribution device 2 to the secon...

Embodiment 2

[0083] This embodiment provides a flue gas treatment method of cascade ozonation, using a flue gas treatment system provided by a specific embodiment to perform cascade ozonation on the flue gas. Described flue gas treatment method comprises:

[0084](I) The ozone generated by the ozone generator 1 is proportionally distributed to different ozone injection devices through the ozone distribution device 2, and the ozone injection amount distributed by the ozone distribution device 2 to each ozone injection device along the sequence of contact between the flue gas and ozone The gradient decreases, specifically, the ozone distributed to the primary ozone injection device 4 by the ozone distribution device 2 and the NO in the flue gas x The molar ratio is 1:1, the ozone distributed by the ozone distribution device 2 to the primary ozone injection device 5 and the NO in the flue gas x The molar ratio is 0.8:1, the ozone distributed by the ozone distribution device 2 to the secondar...

Embodiment 3

[0089] This embodiment provides a flue gas treatment method of cascade ozonation, using a flue gas treatment system provided by a specific embodiment to perform cascade ozonation on the flue gas. Described flue gas treatment method comprises:

[0090] (I) The ozone generated by the ozone generator 1 is proportionally distributed to different ozone injection devices through the ozone distribution device 2, and the ozone injection amount distributed by the ozone distribution device 2 to each ozone injection device along the sequence of contact between the flue gas and ozone The gradient decreases, specifically, the ozone distributed to the primary ozone injection device 4 by the ozone distribution device 2 and the NO in the flue gas x The molar ratio is 1.2:1, the ozone distributed by the ozone distribution device 2 to the primary ozone injection device 5 and the NO in the flue gas x The molar ratio is 1:1, the ozone distributed by the ozone distribution device 2 to the seconda...

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Abstract

The invention provides a flue gas treatment system and a flue gas treatment method for stepped ozone oxidation. The flue gas treatment system comprises an ozone supply unit and a desulfurization and denitrification unit which are connected in sequence, wherein the ozone supply unit comprises an ozone generation device, an ozone distribution device and at least three ozone spraying devices, the ozone generation device is connected with the ozone distribution device, and the ozone distribution device is independently connected with the ozone spraying devices respectively; the desulfurization anddenitrification unit comprises a desulfurization and denitrification device, at least two groups of spraying devices are arranged in the desulfurization and denitrification device in the vertical direction, and an ozone spraying device is arranged below each spraying devices; and an ozone spraying device is arranged on a flue gas inlet pipeline of the desulfurization and denitrification unit. According to the invention, a stepped ozone oxidation flue gas treatment process is adopted, and nitrogen oxide is fully absorbed under the condition of low ozone consumption.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and relates to an ozone oxidation flue gas treatment system and a treatment method, in particular to a cascade ozone oxidation flue gas treatment system and a treatment method. Background technique [0002] With the increasing emphasis on environmental protection, the discharge standards of flue gas pollutants in many industries in my country have become increasingly strict, and desulfurization and dust removal facilities have been basically popularized. In comparison, nitrogen oxides NO x The governance of environmental protection has become the key to restricting the upgrading of environmental protection. my country's iron and steel industry NO x The emissions are second only to power plant boilers and cement kilns, ranking third in the industry. While in the steel industry NO x Among the emissions, more than 50% come from the sintering process. The sintering flue gas has a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/76B01D53/78B01D53/60B01D53/56B01D53/50B01D50/00
CPCB01D50/00B01D53/502B01D53/56B01D53/60B01D53/75B01D53/76B01D53/78B01D2251/104B01D2258/0283Y02A50/20
Inventor 刘勇胡小吐钟璐杨颖欣胡静龄杨森林
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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