CN1872667A - Method for preparing vitriol from flue gas - Google Patents
Method for preparing vitriol from flue gas Download PDFInfo
- Publication number
- CN1872667A CN1872667A CN 200610021240 CN200610021240A CN1872667A CN 1872667 A CN1872667 A CN 1872667A CN 200610021240 CN200610021240 CN 200610021240 CN 200610021240 A CN200610021240 A CN 200610021240A CN 1872667 A CN1872667 A CN 1872667A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- stack gas
- gas
- sulfuric acid
- nitrogen oxides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title abstract description 8
- 239000003546 flue gas Substances 0.000 title abstract description 8
- 239000007864 aqueous solution Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 30
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 19
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 13
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract 6
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 235000011149 sulphuric acid Nutrition 0.000 description 3
- 239000001117 sulphuric acid Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 208000012839 conversion disease Diseases 0.000 description 2
- -1 nitrogen oxide compound Chemical class 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000003637 basic solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
This invention discloses a method for producing sulfuric acid from flue gas. The method comprises: (1) absorbing and treating flue gas containing sulfur dioxide with an aqueous solution of the oxidant to obtain sulfuric acid; (2) converting nitrogen oxides in the flue gas into nitric acid. The method can remove sulfur dioxide and nitrogen oxides from the flue gas, thus can solve the problem of environmental pollution caused by flue gas discharge. Besides, the method can utilize sulfur dioxide and nitrogen oxides in the flue gas, thus can save resources and energy.
Description
Technical field
What the present invention relates to is a kind ofly to prepare the vitriolic method with the stack gas that contains sulfurous gas.
Background technology
With coal, gas, wet goods industrial enterprise, when particularly being the energy, in the stack gas that the burning back is discharged, mostly contain SO with the coal as the energy
2Directly can cause serious environmental pollution problems such as acid rain after the discharging, therefore all need do to discharge after the purifying treatment.This purifying treatment generally all is to adopt basic solution to absorb, and all is difficult at present utilize for the lower absorption liquid of these concentration, is actually a kind of waste to useful resources.
On the other hand, traditional sulfuric acid manufacture method all is to adopt to obtain SO by sulfur burning
2After, under the situation of catalyzer and heating, convert thereof into SO again
3, water absorbs and obtains sulfuric acid again, the process complexity, and energy consumption is also big.
Summary of the invention
In view of the foregoing, the present invention will provide a kind of utilization to contain SO
2Stack gas prepare the vitriolic method, both solved the problem of environmental pollution of flue gas emissions, useful resources is fully utilized, and also save energy greatly of this preparation method.
The present invention prepares the vitriolic method with stack gas, is to obtain after the stack gas that will contain sulfurous gas absorbs processing with the aqueous solution that contains oxygenant.
Because SO
2Be a kind of very easily water-soluble material, generally, the water of 1 volume can dissolve the SO of 40 volumes
2So SO in the stack gas
2After entering the aqueous solution that contains oxygenant, except that can being absorbed fully by water rapidly, make sulfurous acid be oxidized into sulfuric acid rapidly under the effect of oxygenant that simultaneously can also be in water.According to SO in the stack gas
2The difference of content absorbs the also corresponding difference of vitriolic amount that the back is generated.Stack gas circulated with this aqueous solution that contains oxygenant absorb to handle, just can make to be absorbed in the solution and to improve gradually, obtain the sulphuric acid soln of required content's index and/or corresponding uses through the sulfuric acid content of oxidizing reaction conversion generation.Test shows that this absorption and conversion reaction process are very rapid, can finish usually in 1 to several minutes.And also will obviously help reaction with the comparatively high temps that stack gas is brought and carry out and finish.After the absorption that circulates is handled, transform the sulfuric acid concentration that generates in the solution and can reach 60%～80%.
Owing to how also to contain mechanical particulate matter in the stack gas, though after above-mentioned absorption is handled, also can be trapped in the treatment soln by " washing ", then according to using needs, again resulting corresponding sulphuric acid soln being made suitable filtration treatment can be removed, but the inventive method is still making otherwise in advance, and the purified gas that carries out after the dedusting as modes such as electric precipitation commonly used at present is good as raw material.
Another advantage of aforesaid method of the present invention is, to the small amount of nitrogen oxide compound that also may contain usually in the stack gas, as common NO, NO
2Deng, too can be oxidized and transform into nitric acid and removed clean fully.
Operable oxygenant in above-mentioned said absorption treatment soln, can be can be water-soluble various oxygenants, as permanganate (potassium, sodium salt etc.), dichromate (potassium, sodium salt etc.), hydrogen peroxide, and the aqueous solution etc. that is dissolved with ozone.Serve as preferred wherein to select aqueous hydrogen peroxide solution, not only inexpensive and conveniently be easy to get, and also it promptly is transformed into water after reacting, and does not have aftertreatment and secondary pollution problem.
Use aqueous hydrogen peroxide solution when absorbing treatment soln, necessity that the content of hydrogen peroxide in the solution generally is not particularly limited, but from improving the security and the consideration that reduces cost is that 5%～20% the aqueous solution is good with the weight content of use hydrogen peroxide.
Normal pressure or pressurize also help increasing the solubleness of gas in water, and the pressure of the stack gas when therefore absorbing processing is good with the scope of normal pressure～0.6Mpa.
Adopt the stack gas after aforesaid method of the present invention is handled, both thoroughly removed SO wherein
2With the material of serious environment pollutions such as oxynitride, also can remove mechanicalness particulate matter wherein and contain CO
2Purge gas, can further send to according to different needs and purposes and handle accordingly, and one the step promptly can directly obtain the sulphuric acid soln of desired concn, need not more treatment step and other energy and cost consumption, solved the problem of environmental pollution and comprehensive utilization of resources simultaneously, and saved the energy greatly, comprehensive benefit is remarkable.
Embodiment by the following examples is described in further detail foregoing of the present invention again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following example.Do not breaking away under the above-mentioned technological thought situation of the present invention, various replacements or change according to ordinary skill knowledge and customary means are made all should comprise within the scope of the invention.
Embodiment
To behind conventional electric precipitation, (efficiency of dust collection generally 〉=95%) contain CO
2Be about 15%～25% (v), SO
2Be about 0.01%～0.12% (v), N
2And small amount of nitrogen oxide compound, temperature be 100 ℃～150 ℃ stack gas, is the H of 5%～20% (wt) with content down in normal pressure～0.6Mpa
2O
2Solution spraying absorbs, and makes the stack gas cooling simultaneously, is beneficial to follow-up utilization and handles.This spray absorbent solution recycles, and will to reach sulfuric acid content be that 60%～70% absorption treatment soln is removed replacing.Absorb the stack gas that is cleaned after the processing, can send to and do further to utilize to handle.
Claims (4)
1. prepare the vitriolic method with stack gas, it is characterized in that obtaining after the stack gas that will contain sulfurous gas absorbs processing with the aqueous solution that contains oxygenant.
2. as claimed in claim 1ly prepare the vitriolic method, it is characterized in that said oxygenant is a hydrogen peroxide with stack gas.
3. as claimed in claim 2ly prepare the vitriolic method with stack gas, the weight content that it is characterized in that hydrogen peroxide in the said solution is 5%～20%.
4. as claimed in claim 1ly prepare the vitriolic method, it is characterized in that the pressure that said work absorbs the stack gas of handling is normal pressure～0.6Mpa with stack gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100212405A CN100463847C (en) | 2006-06-23 | 2006-06-23 | Method for preparing vitriol from flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100212405A CN100463847C (en) | 2006-06-23 | 2006-06-23 | Method for preparing vitriol from flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1872667A true CN1872667A (en) | 2006-12-06 |
| CN100463847C CN100463847C (en) | 2009-02-25 |
Family
ID=37483298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100212405A Expired - Fee Related CN100463847C (en) | 2006-06-23 | 2006-06-23 | Method for preparing vitriol from flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100463847C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029108A (en) * | 2010-11-07 | 2011-04-27 | 湖南新恒光科技有限公司 | Method and process for recovering sulfur dioxide from absorption tail gas in production process of sulfuric acid |
| CN102228776A (en) * | 2011-05-23 | 2011-11-02 | 威海恒邦化工有限公司 | Method and apparatus for removing sulfur dioxide from sulfuric acid industrial tail gas, and for recovering sulfuric acid |
| CN101842147B (en) * | 2007-08-23 | 2013-03-27 | 卡尔斯鲁厄技术研究院 | Method of Purifying Exhaust Gas |
| CN103084044A (en) * | 2013-01-30 | 2013-05-08 | 程爱平 | Device for preparing sulfuric acid used for adjusting circulating cooling water by utilizing boiler stove smoke |
| CN104649235A (en) * | 2013-11-20 | 2015-05-27 | 绿美企业有限公司 | Method, equipment and system for producing sulfuric acid |
| CN107164629A (en) * | 2017-04-25 | 2017-09-15 | 昆明理工大学 | A kind of aluminium scrap base hydrogenation catalyst processing method based on microwave oxygen-enriched air roasting |
| CN111992015A (en) * | 2020-07-24 | 2020-11-27 | 中国瑞林工程技术股份有限公司 | Flue gas desulfurization method and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050084454A (en) * | 2002-12-21 | 2005-08-26 | 할도르 토프쉐 에이/에스 | Process for removal of so2 from off-gases by reaction with h2o2 |
-
2006
- 2006-06-23 CN CNB2006100212405A patent/CN100463847C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101842147B (en) * | 2007-08-23 | 2013-03-27 | 卡尔斯鲁厄技术研究院 | Method of Purifying Exhaust Gas |
| CN102029108A (en) * | 2010-11-07 | 2011-04-27 | 湖南新恒光科技有限公司 | Method and process for recovering sulfur dioxide from absorption tail gas in production process of sulfuric acid |
| CN102228776A (en) * | 2011-05-23 | 2011-11-02 | 威海恒邦化工有限公司 | Method and apparatus for removing sulfur dioxide from sulfuric acid industrial tail gas, and for recovering sulfuric acid |
| CN103084044A (en) * | 2013-01-30 | 2013-05-08 | 程爱平 | Device for preparing sulfuric acid used for adjusting circulating cooling water by utilizing boiler stove smoke |
| CN104649235A (en) * | 2013-11-20 | 2015-05-27 | 绿美企业有限公司 | Method, equipment and system for producing sulfuric acid |
| CN104649235B (en) * | 2013-11-20 | 2017-11-21 | 绿美企业有限公司 | Method, equipment and system for producing sulfuric acid |
| CN107164629A (en) * | 2017-04-25 | 2017-09-15 | 昆明理工大学 | A kind of aluminium scrap base hydrogenation catalyst processing method based on microwave oxygen-enriched air roasting |
| CN111992015A (en) * | 2020-07-24 | 2020-11-27 | 中国瑞林工程技术股份有限公司 | Flue gas desulfurization method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100463847C (en) | 2009-02-25 |
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Granted publication date: 20090225 Termination date: 20150623 |
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