CN104941418A - Preoxidation method for adsorbing and processing high concentration nitrogen oxide exhaust gas - Google Patents
Preoxidation method for adsorbing and processing high concentration nitrogen oxide exhaust gas Download PDFInfo
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- CN104941418A CN104941418A CN201510357852.0A CN201510357852A CN104941418A CN 104941418 A CN104941418 A CN 104941418A CN 201510357852 A CN201510357852 A CN 201510357852A CN 104941418 A CN104941418 A CN 104941418A
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- high concentration
- exhaust gas
- nitrogen oxide
- concentration nitrogen
- ozone
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Abstract
The invention discloses a preoxidation method for adsorbing and processing high concentration nitrogen oxide exhaust gas. Firstly, ozone is added into the high concentration nitrogen oxide exhaust gas at once in a direction of a dehumidifying device output pipeline vertical to the flowing direction of air flow and is mixed after the high concentration nitrogen oxide exhaust gas is dehumidified to dry, the oxidation time is guaranteed to be 6-15 seconds, and the molar ratio of the addition quantity of the ozone and nitrogen oxides is 3:1. The preoxidation method for adsorbing and processing the high concentration nitrogen oxide exhaust gas dehumidifies high concentration nitrogen oxides in gold wet smelting and oxidizes and preprocesses by adding the ozone, and effectively improves oxidation rate of nitric oxide by optimizing oxidizing condition and selecting high efficient strong oxidizer, thereby greatly improving subsequent absorption processing effect.
Description
Technical field
The present invention relates to the method for pre-oxidizing that a kind of high concentration nitrogen oxide absorbs process, particularly a kind of method for pre-oxidizing improving gold hydrometallurgy middle and high concentration nox adsorption treatment effect.
Background technology
Gold hydrometallurgy nitric acid divides silver, removal of impurities, the molten gold of chloroazotic acid, reduction process to produce high concentration nitrous oxides exhaust gas, and generation is large instantaneously, has strong impulse smell, and toxicity is large, and in numerous waste gas pollution control and treatment, NOx difficulty is maximum, is the arch-criminal of atmosphere pollution.
Domestic and international present stage process gold smelting waste gas high concentration nitrogen oxide generally adopts liquid absorption method.Absorbent can select water, acid, alkali lye, aciduria cellulose solution, ammoniacal liquor, ferrous EDTA liquid complexing solution etc.Adopt which kind of adsorbent all reduce along with NO volume fraction nox adsorption removal efficiency and increase, namely the higher NOx absorptivity of NO oxygenation efficiency is better; What under gold wet processing condition, NO oxidation not it is generally acknowledged is easy, the reason that mainly water capacity is excessive.Ozone is a kind of high-efficient oxidant, can effectively promote NO oxygenation efficiency.
Summary of the invention
The object of this invention is to provide the method for pre-oxidizing that a kind of high concentration nitrous oxides exhaust gas absorbs process,
The method is: first by high concentration nitrous oxides exhaust gas through removal moisture drying, then add ozone immediately at dehumidification equipment export pipeline and air current flow vertical direction and mix, and ensureing that oxidization time is 6-15 second, the addition of ozone and the mol ratio of nitrogen oxide are 3:1, improve NO oxygenation efficiency.
Beneficial effect of the present invention:
Gold hydrometallurgy middle and high concentration nitrogen oxide, through dehumidifying and adding ozone oxidation pretreatment, by optimizing oxidizing condition and selecting efficient strong oxidizer, effectively promotes NO oxygenation efficiency, thus improves subsequent absorption treatment effect greatly.
Detailed description of the invention
The method is: the high concentration nitrous oxides exhaust gas got rid of from reactor is first through removal moisture drying, then add ozone immediately at dehumidification equipment export pipeline and air current flow vertical direction and mix, and ensure that oxidization time is 6-15 second, the addition of ozone and the mol ratio of nitrogen oxide are 3:1, can improve NO oxygenation efficiency, the highly difficult nitrous oxides exhaust gas after pre-oxidation treatment enters subsequent absorption treatment system again.
Claims (1)
1. a high concentration nitrous oxides exhaust gas absorbs the method for pre-oxidizing processed, the method is: first by high concentration nitrous oxides exhaust gas through removal moisture drying, then add ozone immediately at dehumidification equipment export pipeline and air current flow vertical direction and mix, and ensureing that oxidization time is 6-15 second, the addition of ozone and the mol ratio of nitrogen oxide are 3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510357852.0A CN104941418A (en) | 2015-06-25 | 2015-06-25 | Preoxidation method for adsorbing and processing high concentration nitrogen oxide exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510357852.0A CN104941418A (en) | 2015-06-25 | 2015-06-25 | Preoxidation method for adsorbing and processing high concentration nitrogen oxide exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104941418A true CN104941418A (en) | 2015-09-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510357852.0A Pending CN104941418A (en) | 2015-06-25 | 2015-06-25 | Preoxidation method for adsorbing and processing high concentration nitrogen oxide exhaust gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN104941418A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421388A (en) * | 2018-05-02 | 2018-08-21 | 中国恩菲工程技术有限公司 | The denitrification apparatus and method of denitration of the molten gold of wet method and/or Rong Yin workshop sections flue gas |
| CN108465359A (en) * | 2018-05-02 | 2018-08-31 | 中国恩菲工程技术有限公司 | The denitrification apparatus and method of denitration of the molten gold of wet method and/or Rong Yin workshop sections flue gas |
| CN108579370A (en) * | 2018-05-02 | 2018-09-28 | 中国恩菲工程技术有限公司 | The denitrification apparatus and method of denitration of the molten gold of wet method and/or Rong Yin workshop sections flue gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0585025B1 (en) * | 1992-08-25 | 1998-01-14 | Idemitsu Kosan Company Limited | Exhaust gas purifying catalyst |
| CN103977681A (en) * | 2014-06-06 | 2014-08-13 | 长沙奥邦环保实业有限公司 | Denitration method for high-concentration nitric oxide flue gas |
| CN204365118U (en) * | 2014-12-22 | 2015-06-03 | 盐城市名鼎环保设备有限公司 | A kind of simultaneous SO_2 and NO removal system based on optical excitation ozone associating wet scrubbing |
-
2015
- 2015-06-25 CN CN201510357852.0A patent/CN104941418A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0585025B1 (en) * | 1992-08-25 | 1998-01-14 | Idemitsu Kosan Company Limited | Exhaust gas purifying catalyst |
| CN103977681A (en) * | 2014-06-06 | 2014-08-13 | 长沙奥邦环保实业有限公司 | Denitration method for high-concentration nitric oxide flue gas |
| CN204365118U (en) * | 2014-12-22 | 2015-06-03 | 盐城市名鼎环保设备有限公司 | A kind of simultaneous SO_2 and NO removal system based on optical excitation ozone associating wet scrubbing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421388A (en) * | 2018-05-02 | 2018-08-21 | 中国恩菲工程技术有限公司 | The denitrification apparatus and method of denitration of the molten gold of wet method and/or Rong Yin workshop sections flue gas |
| CN108465359A (en) * | 2018-05-02 | 2018-08-31 | 中国恩菲工程技术有限公司 | The denitrification apparatus and method of denitration of the molten gold of wet method and/or Rong Yin workshop sections flue gas |
| CN108579370A (en) * | 2018-05-02 | 2018-09-28 | 中国恩菲工程技术有限公司 | The denitrification apparatus and method of denitration of the molten gold of wet method and/or Rong Yin workshop sections flue gas |
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Application publication date: 20150930 |
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| WD01 | Invention patent application deemed withdrawn after publication |