CN102530888B - Method for preparing sulfuric acid by using sulfur dioxide - Google Patents
Method for preparing sulfuric acid by using sulfur dioxide Download PDFInfo
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- CN102530888B CN102530888B CN2012100209516A CN201210020951A CN102530888B CN 102530888 B CN102530888 B CN 102530888B CN 2012100209516 A CN2012100209516 A CN 2012100209516A CN 201210020951 A CN201210020951 A CN 201210020951A CN 102530888 B CN102530888 B CN 102530888B
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Abstract
A method for preparing sulfuric acid by using sulfur dioxide includes the following steps: (1) purifying sulfur dioxide gas to remove dust; (2) leading the purified sulfur dioxide gas to pass through sulfur dioxide absorption solvent to form rich sulfur dioxide solvent and poor sulfur dioxide gas; (3) extracting sulfur dioxide from the rich sulfur dioxide solvent through heating to form poor sulfur dioxide absorption solvent and high-concentration sulfur dioxide gas; (4) leading the high-concentration sulfur dioxide gas and oxygen to react in at least two contact segments; (5) transmitting partial sulfur dioxide gas and sulfur trioxide gas coming out from a non-tail-end contact segment back to a first contact segment to be mixed with the high-concentration sulfur dioxide and oxygen; and (6) transmitting gas coming out from a tail end contact segment into an absorber to generate sulfuric acid. The method leads conversion efficiency of converting sulfur dioxide to sulfur trioxide to be improved, lays the foundation for preparation of sulfuric acid, and improves concentration of the prepared sulfuric acid.
Description
Technical field
The present invention relates to a kind of method of preparing sulfuric acid by using sulfur dioxide.
Background technology
Sulfuric acid is the highest chemical of output in the world, produces in the world at present approximately 700000 tons, sulfuric acid every day, is a kind of important chemical industrie raw material.
In with anhydrite, producing the process of cement, can produce a large amount of sulfurous gas, make good use of this a part of sulfurous gas, not only can increase the benefit of enterprise, and the discharge of the fine solution SO 2 tail gas of energy, alleviate the burden of enterprise aspect curbing environmental pollution.
At present, contact process is the common method for preparing sulfuric acid and oleum, generally comprises three steps, and namely (1) generates sulfurous gas by the sulfur-bearing raw material; (2) oxidizing sulfur dioxide is generated to sulphur trioxide; (3) sulphur trioxide is contacted with water or the vitriol oil, generate sulfuric acid or oleum.
But the concentration of the sulfurous gas produced in the process of anhydrite production cement is on the low side, its enrichment is more difficult, makes in this way, and the sulfurous gas utilization ratio is on the low side, and on the other hand, the concentration of product sulfuric acid is on the low side, can not reach the requirement of putting on market.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiencies in the prior art, provides a kind of, and the sulfurous gas utilization ratio is high, and can improve the method for the preparing sulfuric acid by using sulfur dioxide of final sulfuric acid product concentration.
The present invention solve the technical problem the technical scheme adopted, and a kind of method of preparing sulfuric acid by using sulfur dioxide comprises the following steps:
(1) sulfur dioxide gas is carried out to purifying treatment, remove dust wherein;
(2) will pass through the sulfurous gas lyosorption through the sulfur dioxide gas that step (1) purifies, form rich sulfurous gas solvent and poor sulfur dioxide gas; Described sulfurous gas lyosorption is the ethyl phosphonic acid diethyl ester;
(3) rich sulfurous gas solvent is heated to 30-100 ℃, from rich sulfurous gas solvent, extracting sulfurous gas, forms the high density sulfur dioxide gas of poor sulfurous gas lyosorption and sulfurous gas volume percent >=10%;
(4) the high density sulfur dioxide gas of step (3) gained sulfurous gas volume percent >=10% and oxygen are reacted at least two (preferably three) contact segments, described contact segment includes catalyzer;
Described catalyzer preferably is mixed with specific surface area>=200m
2The vanadium oxide of the silicon oxide of/g or Lithium Sulphate (weight of preferential oxidation silicon is the 60-80% of total catalyst weight, more preferably the weight of silicon oxide be total catalyst weight 70%); The preferred specific surface area of described silicon oxide is 400-500m
2The silicon oxide of/g;
(5) will send back the first contact segment from out the sulfurous gas that accounts for volume of gas 40-60% and sulfur trioxide gas non-end contact segment, with high density sulfur dioxide gas and the oxygen mix of sulfur dioxide concentration >=10%;
(6) out sulfur trioxide gas in the end contact segment is sent in resorber, with the strong sulfuric acid response of mass concentration >=98%, generated oleum.
The present invention passes through the sulfurous gas lyosorption by sulfurous gas, then from the sulfurous gas lyosorption, discharging sulfurous gas, improve the concentration of sulfurous gas, the concentration of sulfurous gas is increased to>=10%, then make it by least two contact segments, sulfurous gas and oxygen are fully reacted, generate sulphur trioxide, meanwhile, make the contact segment portion gas out of non-end again add the first contact segment, can, so that the concentration of sulfurous gas further increases, be greater than 200m by being mixed with specific surface area
2The vanadium oxide of the silicon oxide of/g or Lithium Sulphate, can strengthen catalytic efficiency, boosts productivity.
These measures strengthen the concentration of sulfurous gas, and making Sulphur Dioxide is the transformation efficiency raising of sulphur trioxide, for the preparation of sulfuric acid, lays a good foundation simultaneously, has improved the concentration of the oleum of preparation.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
The present embodiment comprises the following steps:
(1) sulfur dioxide gas is carried out to purifying treatment, remove dust wherein;
(2) will pass through sulfurous gas lyosorption ethyl phosphonic acid diethyl ester through the sulfur dioxide gas that step (1) purifies, form rich sulfurous gas solvent and poor sulfur dioxide gas;
(3) rich sulfurous gas solvent is heated to 80 ℃, from rich sulfurous gas solvent, extracting sulfurous gas, forms the high density sulfur dioxide gas of poor sulfurous gas lyosorption and sulfurous gas volume percent >=10%;
(4) high density sulfur dioxide gas and the oxygen of step (3) gained sulfurous gas volume percent >=10% are reacted in two contact segments, described contact segment includes catalyzer;
Described catalyzer is for being mixed with specific surface area at 200-300m
2The vanadium oxide of the silicon oxide of/g; The weight of described silicon oxide is 70% of total catalyst weight;
(5) from out the sulfurous gas that accounts for volume of gas 50% and sulfur trioxide gas the second contact segment, send back the first contact segment, with high density sulfur dioxide gas and the oxygen mix of sulfur dioxide concentration >=10%;
(6) out sulfur trioxide gas in the end contact segment is sent in resorber, with the mass concentration sulfuric acid reaction that is 98.3%, generating mass concentration is 99.6% sulfuric acid.
Embodiment 2
In the present embodiment step (3), Heating temperature is 50 ℃;
In step (4), described contact segment is three, and the catalyzer comprised in contact segment is for being mixed with specific surface area at 400-500m
2The Lithium Sulphate of the silicon oxide of/g;
Other steps are identical with embodiment 1.
The mass concentration of the final vitriol oil product of the present embodiment is 99.8%.
Claims (5)
1. the method for a preparing sulfuric acid by using sulfur dioxide, is characterized in that, comprises the following steps:
(1) sulfur dioxide gas is carried out to purifying treatment, remove dust wherein;
(2) will pass through the sulfurous gas lyosorption through the sulfur dioxide gas that step (1) purifies, form rich sulfurous gas solvent and poor sulfur dioxide gas; Described sulfurous gas lyosorption is the ethyl phosphonic acid diethyl ester;
(3) rich sulfurous gas solvent is heated to 30-100 ℃, from rich sulfurous gas solvent, extracting sulfurous gas, forms the high density sulfur dioxide gas of poor sulfurous gas lyosorption and sulfurous gas volume percent >=10%;
(4) high density sulfur dioxide gas and the oxygen of step (3) gained sulfurous gas volume percent >=10% are reacted at least three contact segments, described contact segment includes catalyzer;
(5) will send back the first contact segment from out the sulfurous gas that accounts for volume of gas 40-60% and sulfur trioxide gas non-end contact segment, with high density sulfurous gas and the oxygen mix of sulfur dioxide concentration >=10%;
(6) out sulfur trioxide gas gas in the end contact segment is sent in resorber, with the strong sulfuric acid response of mass concentration >=98%, generated oleum.
2. the method for preparing sulfuric acid by using sulfur dioxide according to claim 1, is characterized in that, in step (4), described catalyzer is for being mixed with specific surface area>=200m
2The vanadium oxide of the silicon oxide of/g or Lithium Sulphate.
3. the method for preparing sulfuric acid by using sulfur dioxide according to claim 2, is characterized in that, the weight of silicon oxide is the 60-80% of total catalyst weight.
4. the method for preparing sulfuric acid by using sulfur dioxide according to claim 3, is characterized in that, the weight of silicon oxide is 70% of total catalyst weight.
5. according to the method for one of claim 2-4 described preparing sulfuric acid by using sulfur dioxide, it is characterized in that, the specific surface area of described silicon oxide is 400-500m
2/ g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100209516A CN102530888B (en) | 2012-01-31 | 2012-01-31 | Method for preparing sulfuric acid by using sulfur dioxide |
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| CN2012100209516A CN102530888B (en) | 2012-01-31 | 2012-01-31 | Method for preparing sulfuric acid by using sulfur dioxide |
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| CN102530888A CN102530888A (en) | 2012-07-04 |
| CN102530888B true CN102530888B (en) | 2013-11-27 |
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| CN108726541B (en) * | 2018-05-28 | 2020-06-09 | 哈尔滨工业大学 | Method for preparing sodium bisulfate by resource utilization of coal chemical industry waste gas and waste water |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057212A (en) * | 1990-06-08 | 1991-12-25 | 底古萨股份公司 | Catalyst for oxidation of sulfur dioxide |
| CN1228715A (en) * | 1996-09-03 | 1999-09-15 | 孟山都公司 | Selective removal and recovery of sulfur dioxide from effluent gases using organic phosphorous solvents |
| CN1382105A (en) * | 1999-10-22 | 2002-11-27 | 孟山都公司 | Process for production of sulfur |
| CN1384805A (en) * | 1999-11-01 | 2002-12-11 | 孟山都公司 | Method for making sulfur trioxide, sulfuric acid, and oleum from sulfur dioxide |
| CN102059039A (en) * | 2010-12-03 | 2011-05-18 | 中国瑞林工程技术有限公司 | Fume purification equipment and preparation method of sulfuric acid |
-
2012
- 2012-01-31 CN CN2012100209516A patent/CN102530888B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057212A (en) * | 1990-06-08 | 1991-12-25 | 底古萨股份公司 | Catalyst for oxidation of sulfur dioxide |
| CN1228715A (en) * | 1996-09-03 | 1999-09-15 | 孟山都公司 | Selective removal and recovery of sulfur dioxide from effluent gases using organic phosphorous solvents |
| CN1382105A (en) * | 1999-10-22 | 2002-11-27 | 孟山都公司 | Process for production of sulfur |
| CN1384805A (en) * | 1999-11-01 | 2002-12-11 | 孟山都公司 | Method for making sulfur trioxide, sulfuric acid, and oleum from sulfur dioxide |
| CN102059039A (en) * | 2010-12-03 | 2011-05-18 | 中国瑞林工程技术有限公司 | Fume purification equipment and preparation method of sulfuric acid |
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Effective date of registration: 20160902 Address after: An Industrial Park Economic Development Zone, Changde City, Hunan province Linli County 415200 Patentee after: Hunan Fu Xiang new type building material Co., Ltd. Address before: 410005, 12 floor, Haidong mansion, Furong Road, Changsha, Hunan Patentee before: Liu Liwen |