CN112897474A - Sulfur trioxide purifying device - Google Patents
Sulfur trioxide purifying device Download PDFInfo
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- CN112897474A CN112897474A CN202110165551.3A CN202110165551A CN112897474A CN 112897474 A CN112897474 A CN 112897474A CN 202110165551 A CN202110165551 A CN 202110165551A CN 112897474 A CN112897474 A CN 112897474A
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- acid
- sulfur trioxide
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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
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
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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
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
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Abstract
The invention relates to the technical field of tail gas treatment, in particular to a device for purifying sulfur trioxide, which comprises a dust remover, a washing tower, a demister and a nicotinic acid absorption tower which are sequentially connected, wherein the washing tower and the nicotinic acid absorption tower are also sequentially connected with a circulating tank and a nicotinic acid cooler, 98% sulfuric acid solution is respectively arranged at the bottoms of the dust remover and the demister, 98% sulfuric acid solution is arranged in the circulating tank, and the nicotinic acid cooler provides cooled acid liquor for the washing tower or the nicotinic acid absorption tower through an acid divider. According to the device for purifying sulfur trioxide, impurities and particles in the flue gas can be removed and absorbed through multiple purification of the dust remover, the demister and the like; in addition, the temperature of the fuming sulfuric acid is adjusted according to the circulating cooling water in the nicotinic acid cooler, so that the fuming sulfuric acid can fully absorb sulfur trioxide in the flue gas, and the generated waste gas returns to a large system for purification without harming the environment.
Description
Technical Field
The invention relates to the technical field of tail gas treatment, in particular to a device for purifying sulfur trioxide.
Background
The main source of atmospheric pollution is the emission of industrial waste gases, the most important sources include power plant flue gases, furnace flue gases, steel-making tail gases, and non-ferrous metal smelting tail gases. Among them, sulfur trioxide is one of the important pollutants. Sulfur trioxide is an oxide of sulfur with the molecular formula SO3It has a strong pungent odor and reacts to sulfuric acid in water, which is one of the major sources of acid rain formation.
The ideal situation is that sulfur trioxide in the flue gas is purified and recovered by a set of flue gas purification device, so that the pollution emission can be reduced, and the purified sulfur trioxide gas can be used for producing electronic-grade sulfuric acid by a direct absorption method. At present, a wet purification process is mainly adopted for nonferrous smelting flue gas, namely, the high-temperature nonferrous smelting flue gas is directly reduced to be below 150 ℃ in a water spraying, temperature reducing and quenching mode. In the process, the arsenic trioxide can be desublimated and separated out, and the acid is promoted to condense, so that the sludge mixed with the arsenic trioxide, the waste acid and the dust is finally obtained. However, impurities in the flue gas in the technology cannot be radically removed, so that the purity of sulfur trioxide cannot be guaranteed, and a raw material cannot be provided for high-quality sulfuric acid, so that a device for purifying sulfur trioxide is urgently needed.
Disclosure of Invention
The invention provides a device for purifying sulfur trioxide, aiming at solving the problem that the existing sulfur trioxide purification device can not remove impurities in flue gas and can not obtain high-purity sulfur trioxide, and the device can be used for obtaining high-purity sulfur trioxide and reducing air pollution.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a purify sulfur trioxide's device, includes dust remover, scrubbing tower, defroster and the nicotinic acid absorption tower that connects gradually, scrubbing tower and nicotinic acid absorption tower still have connected gradually circulation groove and nicotinic acid cooler, the bottom of dust remover and defroster all is provided with 98% sulfuric acid solution, and the inside of circulation groove is provided with 98% sulfuric acid solution, the nicotinic acid cooler provides the acidizing fluid after the cooling through dividing sour ware to scrubbing tower or nicotinic acid absorption tower.
Preferably, the gas outlet of the dust remover is connected with the gas inlet of the washing tower through a pipeline, the gas outlet of the washing tower is connected with the gas inlet of the demister through a pipeline, the gas outlet of the demister is connected with the gas inlet of the nicotinic acid absorption tower through a pipeline, the acid outlet of the washing tower is connected with the acid inlet of the washing circulation tank through a pipeline, and the acid outlet of the nicotinic acid absorption tower is connected with the acid inlet of the absorption circulation tank through a pipeline.
As a preferable scheme, an isolation plate is arranged above the interior of the dust remover, a plurality of filters are arranged below the isolation plate, the tops of the filters penetrate through the isolation plate to be fixed, a mother acid tank is connected below the filters, and analytically pure sulfuric acid is arranged in the mother acid tank.
Preferably, an acid distributor is arranged at the top of the washing tower, and a packing layer is arranged below the acid distributor.
Preferably, an acid inlet is arranged below the washing circulation tank, an acid outlet is arranged at the top of the washing circulation tank, and the acid outlet is connected with a circulation pump.
As a preferable scheme, a separation plate is arranged above the inner part of the demister, a plurality of filters are arranged below the separation plate, the tops of the filters penetrate through the separation plate to be fixed, a mother acid tank is connected below the filters, and analytically pure sulfuric acid is arranged in the mother acid tank.
Preferably, an acid distributor is arranged at the top of the nicotinic acid absorption tower, and a packing layer is arranged below the acid distributor.
Preferably, an acid inlet is arranged below the absorption circulation tank, an acid outlet is arranged at the top of the absorption circulation tank, and the acid outlet is connected with a circulation pump.
As a preferred scheme, a cooling pipeline is arranged in the nicotinic acid cooler, the cooling pipeline is of a bent structure, and two ends of the cooling pipeline are respectively connected with an acid inlet and an acid outlet of the nicotinic acid cooler.
Preferably, the filters in the dust remover are cylindrical, one filter is positioned in the center of the dust remover, the other filters are arranged along the inner side of the dust remover in the circumferential direction, and the mother acid tank is cylindrical.
Preferably, the acid distributor comprises a pipeline and a plurality of spray heads below the pipeline, and the spray heads are uniformly distributed on the pipeline.
The invention has the beneficial effects that:
according to the device for purifying sulfur trioxide, impurities and particles in the flue gas can be removed and absorbed through multiple purification of the dust remover, the demister and the like; in addition, the temperature of the fuming sulfuric acid is adjusted according to the circulating cooling water in the nicotinic acid cooler, so that the fuming sulfuric acid can fully absorb sulfur trioxide in the flue gas, and the generated waste gas returns to a large system for purification without harming the environment.
As a preferable scheme of the invention, the dust remover is provided with a plurality of filters, so that impurity and particulate matters in the flue gas can be better removed.
As a preferable scheme of the invention, the acid distributor comprises a pipeline and a plurality of spray heads below the pipeline, so that the acid liquid can be uniformly sprayed above the packing layer.
As a preferable scheme of the invention, the cooling pipeline inside the nicotinic acid cooler is of a bent structure, so that the acid liquid can flow through the nicotinic acid cooler for a longer time and can be cooled more fully.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for purifying sulfur trioxide of the present invention.
FIG. 2 is a schematic structural diagram of a dust remover in the sulfur trioxide purification device of the present invention.
FIG. 3 is a schematic view showing the structure of a partition plate, a filter and a mother acid tank in an apparatus for purifying sulfur trioxide of the present invention.
In the attached drawings, 1, a dust remover; 12. A separator plate; 14. A filter; 15. a mother acid tank; 2. a washing tower; 22. an acid distributor; 23. a filler layer; 3. A circulation tank; 32. A circulation pump; 4. a demister; 5. a nicotinic acid absorption tower; 7. a nicotinic acid cooler; 75. And (6) cooling the pipeline.
Detailed Description
The present invention is described in detail below with reference to specific examples, but the scope of the present invention is not limited to the following examples, and any technical solutions that can be conceived by those skilled in the art based on the present invention and the common general knowledge in the art are within the scope of the present invention.
As shown in fig. 1 to 3, the device for purifying sulfur trioxide of the present embodiment includes a dust collector 1, a washing tower 2, a demister 4 and a nicotinic acid absorption tower 5 which are connected in sequence, the washing tower 2 and the nicotinic acid absorption tower 5 are both connected in sequence with a circulation tank 3 and a nicotinic acid cooler 7, and the nicotinic acid cooler 7 provides cooled acid liquid to the washing tower 2 or the nicotinic acid absorption tower 5 through an acid distributor 22.
Specifically, the gas outlet of the dust remover 1 is connected with the gas inlet of the washing tower 2 through a pipeline, the gas outlet of the washing tower 2 is connected with the gas inlet of the high-efficiency demister 4 through a pipeline, the gas outlet of the demister 4 is connected with the gas inlet of the nicotinic acid absorption tower 5 through a pipeline, the acid outlet of the washing tower 2 is connected with the acid inlet of the washing circulation tank 3 through a pipeline, and the acid outlet of the nicotinic acid absorption tower 5 is connected with the acid inlet of the absorption circulation tank 3 through a pipeline.
An isolation plate 12 is arranged above the interior of the dust remover 1, a plurality of filters 14 are arranged below the isolation plate 12, the tops of the filters 14 penetrate through the isolation plate 12 for fixing, and a mother acid groove 15 is connected below the filters 14; the filters 14 are cylindrical, one filter 14 is positioned in the center of the high-temperature dust collector 1, and the other filters 14 are circumferentially arranged along the inner side of the high-temperature dust collector 1; due to the action of the isolation plate 12, the flue gas can only enter the top of the high-temperature dust remover through the filter 14, and the filter element of the filter 14 is a PET (polyethylene terephthalate) fiber filter element, so that impurities in the flue gas can be well filtered and attached to the surface of the filter 14; the mother acid tank 15 is cylindrical, analytically pure sulfuric acid is arranged in the mother acid tank, the upper part of the mother acid tank is connected with the filter 14 through a pipeline, when high-temperature flue gas enters the dust remover 1, the analytically pure sulfuric acid volatilizes and adheres to the surface of the filter 14 to form acid dew, impurities on the surface of the filter 14 are dissolved, and the service life of the filter 14 is prolonged; the bottom of the dust remover 1 is provided with 98 percent refined sulfuric acid solution, impurities falling off after acid dew is dissolved can be removed and absorbed, and the 98 percent sulfuric acid solution needs to be replaced periodically, so that the cleanness and the purity of sulfur trioxide are ensured.
The top of the washing tower 2 is provided with an acid distributor 22, a packing layer 23 is arranged below the acid distributor 22, the acid distributor 22 comprises a pipeline and a plurality of spray heads below the pipeline, the spray heads are uniformly distributed on the pipeline, acid liquor from the washing circulation tank 3 can be uniformly sprayed on the packing layer 23 through the acid distributor 22, the packing of the packing layer 23 in the washing tower 2 is quartz ceramic packing, so that the acid liquor on the packing layer 23 and flue gas passing through an air inlet can be sufficiently combined, and impurities and particles in the flue gas can be removed and absorbed.
An acid inlet is formed in the lower left of the washing circulating tank 3, an acid outlet is formed in the top of the washing circulating tank 3, the acid outlet is connected with a circulating pump 32, and 98% refined sulfuric acid solution is arranged in the washing circulating tank 3.
The inside top of defroster 4 is provided with division board 12, the below of division board 12 is provided with a plurality of filters 14, division board 12 is passed at the top of filter 14 and is fixed, the below of filter 14 is connected with mother acid groove 15, and mother acid groove 15 is inside to be provided with the pure sulphuric acid of analysis, filter 14 is cylindrical, and one of them filter 14 is located high-efficient defroster 4's central authorities, other filters 14 arrange along high-efficient defroster 4 inboard circumference. The bottom of the demister 4 is also provided with 98% refined sulfuric acid solution, which can remove and absorb impurities falling off after the acid dew is dissolved.
The top of the nicotinic acid absorption tower 5 is provided with an acid distributor 22, a packing layer 23 is arranged below the acid distributor 22, and the packing of the packing layer 23 in the nicotinic acid absorption tower 5 is tetrafluoro packing.
An acid inlet is formed in the lower left of the absorption circulation tank 3, an acid outlet is formed in the top of the absorption circulation tank 3, the acid outlet is connected with a circulation pump 32, and 98% refined sulfuric acid solution is arranged in the absorption circulation tank 3.
The inside cooling pipeline 75 that is provided with of nicotinic acid cooler 7, cooling pipeline 75 is the bending structure, and its both ends connect the acid inlet and the acid outlet of nicotinic acid cooler 7 respectively.
When the flue gas enters from the air inlet of the dust remover 1, the flue gas enters the upper part of the dust remover 1 through the PET polyester fiber filter 14, the flue gas after first filtration enters the washing tower 2 through the pipeline from the air outlet of the dust remover 1, then a filler layer 23 in the washing tower 2 is combined with 98% refined sulfuric acid solution to remove and absorb impurities in the flue gas, the dust removal efficiency of the dust remover 1 is more than or equal to 98%, the diameter of the dust fog quantity at the outlet of the dust remover 1 is less than 1 mu m, and the temperature is less than or equal to 190 ℃. The 98% refined sulfuric acid solution is firstly pumped out by a circulating pump 32, then is cooled by a nicotinic acid cooler 7, and finally is sprayed by an acid separator 22 to flow downwards to a packing layer 23, the flue gas filtered by the 98% refined sulfuric acid solution enters a demister 4 from a gas outlet of a washing tower 2, the temperature of the flue gas entering the high-efficiency demister is less than or equal to 110 ℃, the flue gas is filtered again by a fiber filter in the demister 4, the efficiency of the demister 4 is more than or equal to 98%, then the flue gas enters a nicotinic acid absorption tower 5 through a pipeline, the flue gas entering the nicotinic acid absorption tower 5 is fully purified, then the 98% refined sulfuric acid in an absorption circulating tank 3 is pumped to the acid separator 22 by the circulating pump to be sprayed, the sulfur trioxide gas in the nicotinic acid absorption tower 5 is absorbed and concentrated to form fuming sulfuric acid, the sulfur trioxide is recycled, and the gas after being separated returns to a large.
The above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the invention, so that equivalent changes or modifications in the structure, features and principles described in the present invention should be included in the claims of the present invention.
Claims (10)
1. The utility model provides a purify sulfur trioxide's device, its characterized in that, is including dust remover (1), scrubbing tower (2), defroster (4) and the nicotinic acid absorption tower (5) that connect gradually, scrubbing tower (2) and nicotinic acid absorption tower (5) still all have connected gradually circulation groove (3) and nicotinic acid cooler (7), the bottom of dust remover (1) and defroster (4) all is provided with 98% sulfuric acid solution, and the inside of circulation groove (3) is provided with 98% sulfuric acid solution, nicotinic acid cooler (7) provide the acidizing fluid after the cooling through dividing sour ware (22) to scrubbing tower (2) or nicotinic acid absorption tower (5).
2. The device for purifying sulfur trioxide according to claim 1, characterized in that the gas outlet of the dust collector (1) is connected with the gas inlet of the washing tower (2) through a pipeline, the gas outlet of the washing tower (2) is connected with the gas inlet of the demister (4) through a pipeline, the gas outlet of the demister (4) is connected with the gas inlet of the nicotinic acid absorption tower (5) through a pipeline, the acid outlet of the washing tower (2) is connected with the acid inlet of the washing circulation tank (3) through a pipeline, and the acid outlet of the nicotinic acid absorption tower (5) is connected with the acid inlet of the absorption circulation tank (3) through a pipeline.
3. The device for purifying sulfur trioxide according to claim 1, characterized in that a partition board (12) is arranged above the inside of the dust collector (1), a plurality of filters (14) are arranged below the partition board (12), the tops of the filters (14) penetrate through the partition board (12) for fixing, a mother acid tank (15) is connected below the filters (14), and analytically pure sulfuric acid is arranged in the mother acid tank (15).
4. The apparatus for purifying sulfur trioxide according to claim 1, characterized in that the scrubbing tower (2) is provided with an acid separator (22) at the top and a packing layer (23) below the acid separator (22).
5. The device for purifying sulfur trioxide according to claim 2, characterized in that an acid inlet is arranged below the washing circulation tank (3), and an acid outlet is arranged at the top of the washing circulation tank (3), and the acid outlet is connected with a circulation pump (32).
6. The device for purifying sulfur trioxide according to claim 1, characterized in that a partition plate (12) is arranged above the inside of the demister (4), a plurality of filters (14) are arranged below the partition plate (12), the tops of the filters (14) penetrate through the partition plate (12) for fixing, a mother acid tank (15) is connected below the filters (14), and analytically pure sulfuric acid is arranged in the mother acid tank (15).
7. The device for purifying sulfur trioxide according to claim 4, characterized in that the top of the nicotinic acid absorption tower (5) is provided with an acid separator (22), and a packing layer (23) is arranged below the acid separator (22).
8. The device for purifying sulfur trioxide according to claim 2, characterized in that an acid inlet is arranged below the absorption circulation tank (3), an acid outlet is arranged at the top of the absorption circulation tank (3), and the acid outlet is connected with a circulation pump (32).
9. The apparatus for purifying sulfur trioxide according to claim 3, characterized in that the filters (14) in the dust separator (1) are cylindrical, one of the filters (14) is located in the center of the dust separator (1), the other filters (14) are arranged circumferentially along the inside of the high temperature dust separator (1), and the mother acid tank (15) is cylindrical.
10. The apparatus for purifying sulfur trioxide according to claim 7, characterized in that the acid separator (22) comprises a pipe and a plurality of spray heads below the pipe, which spray heads are evenly distributed over the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110165551.3A CN112897474B (en) | 2021-02-06 | 2021-02-06 | Device for purifying sulfur trioxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110165551.3A CN112897474B (en) | 2021-02-06 | 2021-02-06 | Device for purifying sulfur trioxide |
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| CN112897474A true CN112897474A (en) | 2021-06-04 |
| CN112897474B CN112897474B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110165551.3A Active CN112897474B (en) | 2021-02-06 | 2021-02-06 | Device for purifying sulfur trioxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115535971A (en) * | 2021-06-29 | 2022-12-30 | 杭州瑞佑科技有限公司 | Method for preparing high-purity electronic grade sulfuric acid from waste sulfuric acid solution |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2027048A1 (en) * | 1990-10-05 | 1992-04-06 | John Mcfarland | Demister candle assembly |
| JPH1095603A (en) * | 1996-09-24 | 1998-04-14 | Mitsui Eng & Shipbuild Co Ltd | Recovery of sulfuric acid from waste sulfuric acid and apparatus for recovering sulfuric acid |
| CN105217580A (en) * | 2015-09-18 | 2016-01-06 | 花垣县强桦矿业有限责任公司 | A kind of electrolytic manganese residues high temperature desulfurizing enriched flue gas prepares the method for sulfuric acid |
| CN106430117A (en) * | 2016-10-21 | 2017-02-22 | 河池市生富冶炼有限责任公司 | Method for preparing analytical pure sulfuric acid by using smelting flue gas |
| CN207221634U (en) * | 2017-04-18 | 2018-04-13 | 江苏沃德凯环保科技有限公司 | A kind of rare-earth smelting exhaust gas cleaner |
| CN208829265U (en) * | 2018-07-25 | 2019-05-07 | 安徽华尔泰化工股份有限公司 | A kind of purification sulfur trioxide process units |
| CN209548876U (en) * | 2018-12-29 | 2019-10-29 | 汶瑞机械(山东)有限公司 | It is a kind of efficiently to wash net and residual alkali displacement apparatus |
-
2021
- 2021-02-06 CN CN202110165551.3A patent/CN112897474B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2027048A1 (en) * | 1990-10-05 | 1992-04-06 | John Mcfarland | Demister candle assembly |
| JPH1095603A (en) * | 1996-09-24 | 1998-04-14 | Mitsui Eng & Shipbuild Co Ltd | Recovery of sulfuric acid from waste sulfuric acid and apparatus for recovering sulfuric acid |
| CN105217580A (en) * | 2015-09-18 | 2016-01-06 | 花垣县强桦矿业有限责任公司 | A kind of electrolytic manganese residues high temperature desulfurizing enriched flue gas prepares the method for sulfuric acid |
| CN106430117A (en) * | 2016-10-21 | 2017-02-22 | 河池市生富冶炼有限责任公司 | Method for preparing analytical pure sulfuric acid by using smelting flue gas |
| CN207221634U (en) * | 2017-04-18 | 2018-04-13 | 江苏沃德凯环保科技有限公司 | A kind of rare-earth smelting exhaust gas cleaner |
| CN208829265U (en) * | 2018-07-25 | 2019-05-07 | 安徽华尔泰化工股份有限公司 | A kind of purification sulfur trioxide process units |
| CN209548876U (en) * | 2018-12-29 | 2019-10-29 | 汶瑞机械(山东)有限公司 | It is a kind of efficiently to wash net and residual alkali displacement apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115535971A (en) * | 2021-06-29 | 2022-12-30 | 杭州瑞佑科技有限公司 | Method for preparing high-purity electronic grade sulfuric acid from waste sulfuric acid solution |
| CN115535971B (en) * | 2021-06-29 | 2024-02-09 | 杭州瑞佑科技有限公司 | Method for preparing high-purity electronic grade sulfuric acid from waste sulfuric acid solution |
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| CN112897474B (en) | 2023-09-29 |
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