CN118122116A - Ozone desulfurization method for sulfuric acid tail gas - Google Patents
Ozone desulfurization method for sulfuric acid tail gas Download PDFInfo
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- CN118122116A CN118122116A CN202410342848.6A CN202410342848A CN118122116A CN 118122116 A CN118122116 A CN 118122116A CN 202410342848 A CN202410342848 A CN 202410342848A CN 118122116 A CN118122116 A CN 118122116A
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- Prior art keywords
- tail gas
- sulfuric acid
- ozone
- acid tail
- reaction
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 238000000034 method Methods 0.000 title claims abstract description 60
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 18
- 230000023556 desulfurization Effects 0.000 title claims abstract description 18
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 61
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Inorganic materials O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 42
- 238000001816 cooling Methods 0.000 claims description 18
- 239000000428 dust Substances 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 230000035484 reaction time Effects 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000005495 cold plasma Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000012716 precipitator Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002367 phosphate rock Substances 0.000 description 4
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
The invention discloses a sulfuric acid tail gas ozone desulfurization method, which comprises the following steps: step S01: tail gas pretreatment, step S02: ozone generation, step S03: mixing reaction, step S04: reaction product treatment and step S05: and (5) treating residual tail gas. The beneficial effects of the invention are as follows: the sulfuric acid tail gas desulfurization method provided by the invention has the advantages of simple process steps, low cost and easy operation realization, can effectively remove sulfur dioxide in sulfuric acid tail gas, can also utilize the tail gas to regenerate sulfuric acid, reduces the emission of sulfur dioxide into the air, and is suitable for popularization and use, and the sulfuric acid tail gas desulfurization method has the advantages of protecting the environment and simultaneously additionally improving the sulfuric acid yield.
Description
Technical Field
The invention relates to the technical field of sulfuric acid tail gas treatment, in particular to an ozone desulfurization method for sulfuric acid tail gas.
Background
Sulfuric acid is one of the inorganic chemicals with the largest yield, and is widely applied to the production of products such as fertilizers, chemicals, medicines, detergents, water treatment agents and the like. Sulfuric acid production is often used as a marker for measuring the state of industry. But as a chemical industry with high pollution, the sulfuric acid industry discharges a large amount of sulfur dioxide to the atmosphere, which severely pollutes the environment.
At present, the treatment of sulfuric acid tail gas is generally carried out by adopting a lime method, a calcium carbonate method, an ammonia method or a sodium method, the treatment process is complicated, the treatment effect is poor, the treated sulfite washing slurry containing calcium, sodium, ammonia and the like is not fully utilized, and some sulfite washing slurry is even directly used as waste residues to be abandoned, so that secondary pollution is caused; meanwhile, a device for removing magnesium oxide through phosphorite reverse flotation is generally built in the wet-process phosphoric acid production process, a certain amount of inorganic acid such as sulfuric acid or phosphoric acid is required to be added as a conditioner before reverse flotation, and the pH value of the phosphorite slurry is adjusted to 4.0-5.0; every 1 ton of raw phosphorite is treated, 10-25 kg of inorganic acid such as sulfuric acid and phosphoric acid is consumed, the reverse flotation production cost of phosphorite is increased by 4.00-10.00 yuan, the cost is high, and further development and improvement are required.
Disclosure of Invention
The invention aims to provide an ozone desulfurization method for sulfuric acid tail gas, which aims to solve the problems of complex treatment process, poor treatment effect and higher cost of the conventional sulfuric acid treatment method.
The invention realizes the above purpose through the following technical scheme: an ozone desulfurization method for sulfuric acid tail gas, comprising the following steps:
step S01: the method comprises the steps of pretreating the tail gas, cooling the sulfuric acid tail gas by a cooling device, and introducing dust removing equipment to remove suspended particles and solid impurities in the sulfuric acid tail gas;
step S02: ozone generation, wherein an ozone generator is used for generating ozone by oxygen or oxygen molecules in the air;
Step S03: mixing reaction, namely mixing the sulfuric acid tail gas pretreated in the step S01 with the ozone generated in the step S02, and oxidizing sulfur dioxide in the sulfuric acid tail gas by ozone to generate sulfur trioxide;
step S04: treating a reaction product, namely reacting the sulfur trioxide generated in the step S03 with water at a corresponding temperature and pressure to generate sulfuric acid;
step S05: and (3) treating residual tail gas, namely purifying the tail gas which remains after the reaction in the step S05 through the steps of cooling, washing and the like, and then normally discharging.
Further, in the step S01, the dust removing device is one of a particulate filter, an electric precipitator, or a settling chamber.
Further, the specific method for generating ozone in the step S02 is one of a corona discharge method, an ultraviolet radiation method, or a cold plasma method.
Further, the reaction temperature in the step S03 is 120-180 ℃ and the reaction time is 1-2min.
Further, the reaction temperature in the step S04 is 200-250 ℃ and the reaction time is 10-15min.
Compared with the prior art, the invention has the beneficial effects that: the sulfuric acid tail gas desulfurization method provided by the invention has the advantages of simple process steps, low cost and easy operation realization, can effectively remove sulfur dioxide in sulfuric acid tail gas, can also utilize the tail gas to regenerate sulfuric acid, reduces the emission of sulfur dioxide into the air, and is suitable for popularization and use, and the sulfuric acid tail gas desulfurization method has the advantages of protecting the environment and simultaneously additionally improving the sulfuric acid yield.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The method for desulfurizing sulfuric acid tail gas by ozone, which is shown in the figure 1, comprises the following steps:
step S01: the method comprises the steps of pretreating the tail gas, cooling the sulfuric acid tail gas by a cooling device, and introducing dust removing equipment to remove suspended particles and solid impurities in the sulfuric acid tail gas;
step S02: ozone generation, wherein an ozone generator is used for generating ozone by oxygen or oxygen molecules in the air;
Step S03: mixing reaction, namely mixing the sulfuric acid tail gas pretreated in the step S01 with the ozone generated in the step S02, and oxidizing sulfur dioxide in the sulfuric acid tail gas by ozone to generate sulfur trioxide;
step S04: treating a reaction product, namely reacting the sulfur trioxide generated in the step S03 with water at a corresponding temperature and pressure to generate sulfuric acid;
step S05: and (3) treating residual tail gas, namely purifying the tail gas which remains after the reaction in the step S05 through the steps of cooling, washing and the like, and then normally discharging.
The dust removing equipment in the step S01 is one of a particulate filter, an electric dust remover or a sedimentation chamber; the specific generation method of ozone in the step S02 is one of a corona discharge method, an ultraviolet radiation method or a cold plasma method; the reaction temperature in the step S03 is 120-180 ℃ and the reaction time is 1-2min; the reaction temperature in the step S04 is 200-250 ℃ and the reaction time is 10-15min.
The invention is illustrated by the following more specific examples.
Embodiment one:
an ozone desulfurization method for sulfuric acid tail gas, comprising the following steps:
step S01: the method comprises the steps of pretreating the tail gas, cooling the sulfuric acid tail gas by a cooling device, and introducing dust removing equipment to remove suspended particles and solid impurities in the sulfuric acid tail gas;
step S02: ozone generation, wherein an ozone generator is used for generating ozone by oxygen or oxygen molecules in the air;
Step S03: mixing reaction, namely mixing the sulfuric acid tail gas pretreated in the step S01 with the ozone generated in the step S02, and oxidizing sulfur dioxide in the sulfuric acid tail gas by ozone to generate sulfur trioxide;
step S04: treating a reaction product, namely reacting the sulfur trioxide generated in the step S03 with water at a corresponding temperature and pressure to generate sulfuric acid;
step S05: and (3) treating residual tail gas, namely purifying the tail gas which remains after the reaction in the step S05 through the steps of cooling, washing and the like, and then normally discharging.
The dust removing equipment in the step S01 is one of a particulate filter, an electric dust remover or a sedimentation chamber; the specific generation method of ozone in the step S02 is one of a corona discharge method, an ultraviolet radiation method or a cold plasma method; the reaction temperature in the step S03 is 120 ℃, and the reaction time is 1min; the reaction temperature in the step S04 is 200 ℃, and the reaction time is 10min.
Embodiment two:
an ozone desulfurization method for sulfuric acid tail gas, comprising the following steps:
step S01: the method comprises the steps of pretreating the tail gas, cooling the sulfuric acid tail gas by a cooling device, and introducing dust removing equipment to remove suspended particles and solid impurities in the sulfuric acid tail gas;
step S02: ozone generation, wherein an ozone generator is used for generating ozone by oxygen or oxygen molecules in the air;
Step S03: mixing reaction, namely mixing the sulfuric acid tail gas pretreated in the step S01 with the ozone generated in the step S02, and oxidizing sulfur dioxide in the sulfuric acid tail gas by ozone to generate sulfur trioxide;
step S04: treating a reaction product, namely reacting the sulfur trioxide generated in the step S03 with water at a corresponding temperature and pressure to generate sulfuric acid;
step S05: and (3) treating residual tail gas, namely purifying the tail gas which remains after the reaction in the step S05 through the steps of cooling, washing and the like, and then normally discharging.
The dust removing equipment in the step S01 is one of a particulate filter, an electric dust remover or a sedimentation chamber; the specific generation method of ozone in the step S02 is one of a corona discharge method, an ultraviolet radiation method or a cold plasma method; the reaction temperature in the step S03 is 150 ℃, and the reaction time is 1.5min; the reaction temperature in the step S04 is 225 ℃, and the reaction time is 12min.
Embodiment III:
an ozone desulfurization method for sulfuric acid tail gas, comprising the following steps:
step S01: the method comprises the steps of pretreating the tail gas, cooling the sulfuric acid tail gas by a cooling device, and introducing dust removing equipment to remove suspended particles and solid impurities in the sulfuric acid tail gas;
step S02: ozone generation, wherein an ozone generator is used for generating ozone by oxygen or oxygen molecules in the air;
Step S03: mixing reaction, namely mixing the sulfuric acid tail gas pretreated in the step S01 with the ozone generated in the step S02, and oxidizing sulfur dioxide in the sulfuric acid tail gas by ozone to generate sulfur trioxide;
step S04: treating a reaction product, namely reacting the sulfur trioxide generated in the step S03 with water at a corresponding temperature and pressure to generate sulfuric acid;
step S05: and (3) treating residual tail gas, namely purifying the tail gas which remains after the reaction in the step S05 through the steps of cooling, washing and the like, and then normally discharging.
The dust removing equipment in the step S01 is one of a particulate filter, an electric dust remover or a sedimentation chamber; the specific generation method of ozone in the step S02 is one of a corona discharge method, an ultraviolet radiation method or a cold plasma method; the reaction temperature in the step S03 is 180 ℃, and the reaction time is 2min; the reaction temperature in the step S04 is 250 ℃, and the reaction time is 15min.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (5)
1. The sulfuric acid tail gas ozone desulfurization method is characterized by comprising the following steps of:
step S01: the method comprises the steps of pretreating the tail gas, cooling the sulfuric acid tail gas by a cooling device, and introducing dust removing equipment to remove suspended particles and solid impurities in the sulfuric acid tail gas;
step S02: ozone generation, wherein an ozone generator is used for generating ozone by oxygen or oxygen molecules in the air;
Step S03: mixing reaction, namely mixing the sulfuric acid tail gas pretreated in the step S01 with the ozone generated in the step S02, and oxidizing sulfur dioxide in the sulfuric acid tail gas by ozone to generate sulfur trioxide;
step S04: treating a reaction product, namely reacting the sulfur trioxide generated in the step S03 with water at a corresponding temperature and pressure to generate sulfuric acid;
step S05: and (3) treating residual tail gas, namely purifying the tail gas which remains after the reaction in the step S05 through the steps of cooling, washing and the like, and then normally discharging.
2. The method for ozone desulfurization of sulfuric acid tail gas according to claim 1, wherein the dust removing device in the step S01 is one of a particulate filter, an electric precipitator or a settling chamber.
3. The method for ozone desulfurization of sulfuric acid tail gas according to claim 1, wherein the specific method for generating ozone in the step S02 is one of a corona discharge method, an ultraviolet radiation method and a cold plasma method.
4. The method for ozone desulfurization of sulfuric acid tail gas according to claim 1, wherein the reaction temperature in the step S03 is 120-180 ℃ and the reaction time is 1-2min.
5. The method for ozone desulfurization of sulfuric acid tail gas according to claim 1, wherein the reaction temperature in the step S04 is 200-250 ℃ and the reaction time is 10-15min.
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|---|---|---|---|
| CN202410342848.6A CN118122116A (en) | 2024-03-25 | 2024-03-25 | Ozone desulfurization method for sulfuric acid tail gas |
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| CN202410342848.6A CN118122116A (en) | 2024-03-25 | 2024-03-25 | Ozone desulfurization method for sulfuric acid tail gas |
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| CN118122116A true CN118122116A (en) | 2024-06-04 |
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| CN202410342848.6A Pending CN118122116A (en) | 2024-03-25 | 2024-03-25 | Ozone desulfurization method for sulfuric acid tail gas |
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