CN104386653A - Method for producing liquid sulfur dioxide by using sulfur-containing flue gas - Google Patents
Method for producing liquid sulfur dioxide by using sulfur-containing flue gas Download PDFInfo
- Publication number
- CN104386653A CN104386653A CN201410577530.2A CN201410577530A CN104386653A CN 104386653 A CN104386653 A CN 104386653A CN 201410577530 A CN201410577530 A CN 201410577530A CN 104386653 A CN104386653 A CN 104386653A
- Authority
- CN
- China
- Prior art keywords
- sulfur
- gas
- sulfur dioxide
- sulfuric acid
- liquid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/60—Isolation of sulfur dioxide from gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a method for producing liquid sulfur dioxide by using sulfur-containing flue gas and belongs to the technical field of chemical engineering and environment protection. The method comprises the following steps: a, absorbing the sulfur-containing flue gas by desulfurization absorption liquid to obtain a sulfur-containing absorption liquid; b, adding sulfuric acid into the sulfur-containing absorption liquid, and performing decomposition to obtain acidolysis liquid and SO2 gas containing steam; c, spraying and drying the SO2 gas containing the steam by using the sulfuric acid till the water content of the SO2 gas is smaller than or equal to 0.2 g/Nm<3>; d, pressurizing, de-oiling and liquefying the dried SO2 gas under the pressure condition of 0.25-0.7 MPa to obtain the liquid sulfur dioxide. The method has the benefits that a flue gas desulfurization byproduct is the liquid sulfur dioxide, so that the economic benefits of the flue gas are remarkably improved, and secondary pollution is avoided.
Description
Technical field
The invention belongs to chemical engineering and environmental protection technical field, be specifically related to a kind of method utilizing sulfur-containing smoke gas to produce sulfur dioxide liquid.
Background technology
China's sulphur dioxide emission are huge, cause severe contamination to atmospheric environment, exceeded the self-purification capacity of China's atmospheric environment, the year Precipitation pH region that is less than 5.6 accounts for 40% of area, cause tremendous economic to lose, have a strong impact on China's ecotope and people ' s health.SO
2the formation of discharge and acid rain is mainly derived from the fields such as fire coal, metallurgy, chemical industry.
Along with the development of Technological Economy, going deep into of circular economy concept, ammonia-process desulfurization technique highlights its advantage, except desulfuration efficiency is high, also has and removes part NO
xability.
The ammonia process of desulfurization is ammonium sulfate byproduct mainly, and product is single.
Sulfur dioxide liquid is a kind of important industrial chemicals, is widely used in the industrial sectors such as organic dye, plastics, synthon, medicine, agricultural chemicals.Domestic printing and dyeing, auxiliary agent vat powder production in consumption very large.For the ease of transport and storage, major part is the form supply user of sulfur dioxide gas being processed into sulfur dioxide liquid.
Summary of the invention
Main purpose of the present invention is to provide a kind of sulfur-containing smoke gas that utilizes and produces the method for sulfur dioxide liquid, can effectively make the sulfur-bearing conversion in flue gas be sulfur dioxide liquid, thus reaches and do not produce pollution, improves the object of flue gas economic benefit.
The technical solution used in the present invention is a kind of method utilizing sulfur-containing smoke gas to produce sulfur dioxide liquid, and the method comprises the following steps:
A, sulfur-containing smoke gas to be absorbed through desulfurization absorption liquid, obtain sulfur-bearing absorption liquid;
B, above-mentioned sulfur-bearing absorption liquid is added sulfuric acid decompose, obtain acid hydrolysis solution and the SO containing water vapor
2gas;
C, by the described SO containing water vapor
2gas sulfuric acid spray drying, to SO
2gas water content≤0.2g/Nm
3;
D, by dried SO
2gas pressurizes under the pressure condition of 0.25 ~ 0.7MPa, oil removing, and liquefaction, obtains sulfur dioxide liquid.
As preferably, in described step a, desulfurization absorption liquid is ammonium sulphite.
As preferably, the concentration adding sulfuric acid in described step b is 90% ~ 98.5% (volume ratio).
As preferably, in described step c, the amount of sulfuric acid spray is 120m
3/ h ~ 160m
3/ h.
As preferably, in drying, nanofiber mist eliminator in described step c, is adopted to remove dry SO
2the acid mist brought in gas process.
Add the decomposition reaction that sulfuric acid carries out decomposing as follows:
For making sub-salt decompose completely, the sulfuric acid added must be over the calculated value of above-mentioned chemical reaction, to guarantee that imonium salt decomposes completely.
Beneficial effect of the present invention is:
(1) flue gas desulfurization byproduct is sulfur dioxide liquid, significantly improves the economic benefit of flue gas, does not produce secondary pollution, reaches the object of recycling economy.
(2) production cost of sulfur dioxide liquid can significantly be reduced.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, one detailed description is done to the method for the invention and device, but not as limitation of the present invention.
Embodiment 1
A, by sulfur-containing smoke gas, (concentration containing sulfurous gas is 13210mg/Nm
3) absorb through ammonium sulfite solution (concentration is 254g/L), obtain sulfur-bearing absorption liquid; Sulfur dioxide concentration in sulfur-containing smoke gas after absorbing is 30mg/Nm
3.
B, sulfur-bearing absorption liquid added concentration of volume percent be 95% sulfuric acid decompose, obtain acid hydrolysis solution and the SO containing water vapor
2gas;
C, by the SO containing water vapor
2gas sulfuric acid spray drying, to SO
2gas water content≤0.2g/Nm
3; The amount of sulfuric acid spray is 140m
3/ h.In drying, adopt nanofiber mist eliminator to remove dry SO
2the acid mist brought in gas process.
D, by dried SO
2gas pressurizes under the pressure condition of 0.25 ~ 0.7MPa, oil removing, and liquefaction, obtains sulfur dioxide liquid.Output is 116.14kg/h.
Embodiment 2
A, by sulfur-containing smoke gas, (concentration containing sulfurous gas is 14035mg/Nm
3) absorb through ammonium sulfite solution (concentration is 245g/L), obtain sulfur-bearing absorption liquid; Sulfur dioxide concentration in sulfur-containing smoke gas after absorbing is 35mg/Nm
3.
B, sulfur-bearing absorption liquid added concentration of volume percent be 90% sulfuric acid decompose, obtain acid hydrolysis solution and the SO containing water vapor
2gas;
C, by the SO containing water vapor
2gas sulfuric acid spray drying, to SO
2gas water content≤0.2g/Nm
3; The amount of sulfuric acid spray is 160m
3/ h.In drying, adopt nanofiber mist eliminator to remove dry SO
2the acid mist brought in gas process.
D, by dried SO
2gas pressurizes under the pressure condition of 0.25 ~ 0.7MPa, oil removing, and liquefaction, obtains sulfur dioxide liquid.Output is 117.33kg/h.
Embodiment 3
A, by sulfur-containing smoke gas, (concentration containing sulfurous gas is 14655mg/Nm
3) absorb through ammonium sulfite solution (concentration is 251g/L), obtain sulfur-bearing absorption liquid; Sulfur dioxide concentration in sulfur-containing smoke gas after absorbing is 40mg/Nm
3.
B, sulfur-bearing absorption liquid added concentration of volume percent be 98.5% sulfuric acid decompose, obtain acid hydrolysis solution and the SO containing water vapor
2gas;
C, by the SO containing water vapor
2gas sulfuric acid spray drying, to SO
2gas water content≤0.2g/Nm
3; The amount of sulfuric acid spray is 120m
3/ h.In drying, adopt nanofiber mist eliminator to remove dry SO
2the acid mist brought in gas process.
D, by dried SO
2gas pressurizes under the pressure condition of 0.25 ~ 0.7MPa, oil removing, and liquefaction, obtains sulfur dioxide liquid.Output is 115.67kg/h.
In above-mentioned enforcement, contain the SO of water vapor with sulfuric acid spray drying
2gas, sulfuric acid used utilizes concentration to be that the vitriol oil of 95% ~ 98% (volume ratio) carries out drying.Another ammonium sulfite solution can substitute with the sub-salts solution containing ammonium sulphite, ammonium bisulfite and ammonium sulfate.
Embodiment 4
A, by sulfur-containing smoke gas, (concentration containing sulfurous gas is 13210mg/Nm
3) absorb through sub-salts solution, obtain sulfur-bearing absorption liquid; Sulfur dioxide concentration in sulfur-containing smoke gas after absorbing is 30mg/Nm
3.In this sub-salts solution, the content of ammonium sulphite is 254g/L, the content of ammonium bisulfite is 80g/L, the content of ammonium sulfate is 146g/L.
B, sulfur-bearing absorption liquid added concentration of volume percent be 95% sulfuric acid decompose, obtain acid hydrolysis solution and the SO containing water vapor
2gas;
C, by the SO containing water vapor
2gas sulfuric acid spray drying, to SO
2gas water content≤0.2g/Nm
3; The amount of sulfuric acid spray is 140m
3/ h.In drying, adopt nanofiber mist eliminator to remove dry SO
2the acid mist brought in gas process.
D, by dried SO
2gas pressurizes under the pressure condition of 0.25 ~ 0.7MPa, oil removing, and liquefaction, obtains sulfur dioxide liquid.Output is 166.14kg/h.
Finally it should be noted that, above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although with reference to above-described embodiment to invention has been detailed description, those skilled in the art are to be understood that, still can modify to the present invention or equivalent replacement, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in right of the present invention.
Claims (5)
1. utilize sulfur-containing smoke gas to produce a method for sulfur dioxide liquid, it is characterized in that: the method comprises the following steps:
A, sulfur-containing smoke gas to be absorbed through desulfurization absorption liquid, obtain sulfur-bearing absorption liquid;
B, above-mentioned sulfur-bearing absorption liquid is added sulfuric acid decompose, obtain acid hydrolysis solution and the SO containing water vapor
2gas;
C, by the described SO containing water vapor
2gas sulfuric acid spray drying, to SO
2gas water content≤0.2g/Nm
3;
D, by dried SO
2gas pressurizes under the pressure condition of 0.25 ~ 0.7MPa, oil removing, and liquefaction, obtains sulfur dioxide liquid.
2. a kind of method utilizing sulfur-containing smoke gas to produce sulfur dioxide liquid according to claim 1, is characterized in that: in described step a, desulfurization absorption liquid is ammonium sulphite.
3. a kind of method utilizing sulfur-containing smoke gas to produce sulfur dioxide liquid according to claim 1, is characterized in that: the concentration adding sulfuric acid in described step b is 90% ~ 98.5% (volume ratio).
4. a kind of method utilizing sulfur-containing smoke gas to produce sulfur dioxide liquid according to claim 1, is characterized in that: in described step c, the amount of sulfuric acid spray is 120m
3/ h ~ 160m
3/ h.
5. a kind of method utilizing sulfur-containing smoke gas to produce sulfur dioxide liquid according to claim 1, is characterized in that: in drying, adopt nanofiber mist eliminator to remove dry SO in described step c
2the acid mist brought in gas process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410577530.2A CN104386653A (en) | 2014-10-24 | 2014-10-24 | Method for producing liquid sulfur dioxide by using sulfur-containing flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410577530.2A CN104386653A (en) | 2014-10-24 | 2014-10-24 | Method for producing liquid sulfur dioxide by using sulfur-containing flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104386653A true CN104386653A (en) | 2015-03-04 |
Family
ID=52604636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410577530.2A Pending CN104386653A (en) | 2014-10-24 | 2014-10-24 | Method for producing liquid sulfur dioxide by using sulfur-containing flue gas |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049184A (en) * | 2009-10-27 | 2011-05-11 | 中国石油化工股份有限公司 | Method for treatment of high-SO2-concentration and low-oxygen-content flue gas |
| CN102580484A (en) * | 2012-02-27 | 2012-07-18 | 中南大学 | Method for purifying and recovering smoke containing sulfur dioxide |
| CN102652895A (en) * | 2012-05-08 | 2012-09-05 | 杭州三耐环保科技有限公司 | Method for recovering sulfur dioxide in flue gas |
| CN103349900A (en) * | 2013-07-22 | 2013-10-16 | 云南亚太环境工程设计研究有限公司 | Method for desulfurating and denitrating simultaneously |
| CN103480245A (en) * | 2013-10-09 | 2014-01-01 | 中国恩菲工程技术有限公司 | Equipment for preparing liquid sulfur dioxide by utilizing sulfur dioxide flue gas |
| CN103861439A (en) * | 2014-03-25 | 2014-06-18 | 云南亚太环境工程设计研究有限公司 | Method for simultaneously desulfurizing, denitrating and purifying flue gas |
-
2014
- 2014-10-24 CN CN201410577530.2A patent/CN104386653A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049184A (en) * | 2009-10-27 | 2011-05-11 | 中国石油化工股份有限公司 | Method for treatment of high-SO2-concentration and low-oxygen-content flue gas |
| CN102580484A (en) * | 2012-02-27 | 2012-07-18 | 中南大学 | Method for purifying and recovering smoke containing sulfur dioxide |
| CN102652895A (en) * | 2012-05-08 | 2012-09-05 | 杭州三耐环保科技有限公司 | Method for recovering sulfur dioxide in flue gas |
| CN103349900A (en) * | 2013-07-22 | 2013-10-16 | 云南亚太环境工程设计研究有限公司 | Method for desulfurating and denitrating simultaneously |
| CN103480245A (en) * | 2013-10-09 | 2014-01-01 | 中国恩菲工程技术有限公司 | Equipment for preparing liquid sulfur dioxide by utilizing sulfur dioxide flue gas |
| CN103861439A (en) * | 2014-03-25 | 2014-06-18 | 云南亚太环境工程设计研究有限公司 | Method for simultaneously desulfurizing, denitrating and purifying flue gas |
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Application publication date: 20150304 |
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