CN220110772U - Flue gas carbon dioxide trapping device - Google Patents
Flue gas carbon dioxide trapping device Download PDFInfo
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- CN220110772U CN220110772U CN202321052160.1U CN202321052160U CN220110772U CN 220110772 U CN220110772 U CN 220110772U CN 202321052160 U CN202321052160 U CN 202321052160U CN 220110772 U CN220110772 U CN 220110772U
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- CN
- China
- Prior art keywords
- reaction kettle
- flue gas
- leaching
- absorption
- carbon dioxide
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- 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.)
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 239000003546 flue gas Substances 0.000 title claims abstract description 58
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 40
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 40
- 238000010521 absorption reaction Methods 0.000 claims abstract description 61
- 238000002386 leaching Methods 0.000 claims abstract description 50
- 239000002893 slag Substances 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 14
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract description 24
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 24
- 229910052749 magnesium Inorganic materials 0.000 abstract description 24
- 239000011777 magnesium Substances 0.000 abstract description 24
- 235000019270 ammonium chloride Nutrition 0.000 abstract description 12
- 239000002904 solvent Substances 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 16
- 229910000019 calcium carbonate Inorganic materials 0.000 description 8
- 239000011575 calcium Substances 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- -1 flue gas carbon dioxide Chemical class 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to a flue gas carbon dioxide capturing device, which comprises a leaching reaction kettle and an absorption reaction kettle, wherein a stirrer is arranged in the leaching reaction kettle, a feed inlet is arranged at the top of the leaching reaction kettle, an inlet is arranged at the upper part of a side wall, a slag hole and a leaching liquid outlet are arranged at the bottom of the leaching reaction kettle, a slag hole is arranged at the bottom of the absorption reaction kettle, an absorption liquid outlet is arranged at the lower part of the side wall, an absorption liquid inlet is arranged at the upper part of the side wall, and the absorption liquid inlet is communicated with the leaching liquid outlet of the leaching reaction kettle; the top of the absorption reaction kettle is provided with a flue gas inlet and a tail gas outlet, and the flue gas carbon dioxide trapping device further comprises a flue gas inlet pipe which stretches into the inner bottom of the absorption reaction kettle through the flue gas inlet. The device takes the ammonium chloride leaching solution of magnesium reducing slag as the absorption liquid for absorbing carbon dioxide in flue gas, can realize the permanent sealing of carbon dioxide, and the solution after the adsorption reaction can be used as the leaching solution of magnesium reducing slag for recycling, thereby solving the problems of high energy consumption and large loss of trapping solvent commonly existing in the prior art.
Description
Technical Field
The utility model relates to a flue gas carbon dioxide trapping device, and belongs to the technical field of environmental engineering.
Background
Fossil fuel power plant flue gas is a long-term stable emission source of carbon dioxide, and the amount of carbon dioxide emitted by the flue gas accounts for about 30% of the total emission. Therefore, the method for capturing, sealing and utilizing the carbon dioxide in the flue gas is a main way for reducing the emission of greenhouse gases.
The magnesium reducing slag is industrial waste slag generated by smelting magnesium by a silicothermic process, and the production of 1t of raw magnesium generates 5.5-10t of magnesium reducing slag according to statistics. In recent years, the production scale of raw magnesium is continuously expanded, so that the yield of magnesium reduction slag is continuously increased. At present, magnesium reducing slag is basically piled up in open air, a large amount of dust can be generated to pollute the environment, and meanwhile, the moisture absorption of the magnesium slag can cause environmental problems such as soil hardening, alkalization and the like. The content of calcium in the magnesium reducing slag is higher, the magnesium reducing slag can be used for absorbing carbon dioxide in flue gas and generating calcium carbonate with economic benefit, and the magnesium reducing slag has great significance in solving the pollution problem of the magnesium reducing slag while reducing emission.
In the prior art, the flue gas carbon dioxide trapping device has the common problems of high energy consumption and large trapping solvent loss. Therefore, there is a need to design a new flue gas carbon dioxide capture device to solve the problems in the prior art.
Disclosure of Invention
The utility model aims to provide a novel flue gas carbon dioxide trapping device, aiming at the problems of high energy consumption and large trapping solvent loss of the flue gas carbon dioxide trapping device in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the flue gas carbon dioxide capturing device comprises a leaching reaction kettle and an absorption reaction kettle, wherein a stirrer is arranged in the leaching reaction kettle, a feed inlet is arranged at the top of the leaching reaction kettle, an inlet is arranged at the upper part of the side wall, and a slag outlet and a leaching liquid outlet are arranged at the bottom of the side wall;
the bottom of the absorption reaction kettle is provided with a slag hole, the lower part of the side wall is provided with an absorption liquid outlet, the upper part of the side wall is provided with an absorption liquid inlet, and the absorption liquid inlet is communicated with a leaching liquid outlet of the leaching reaction kettle through a pipeline and a pump; the top of the absorption reaction kettle is provided with a flue gas inlet and a tail gas outlet;
the flue gas carbon dioxide trapping device further comprises a flue gas inlet pipe, and the flue gas inlet pipe stretches into the inner bottom of the absorption reaction kettle through a flue gas inlet of the absorption reaction kettle.
When the method is used, firstly, magnesium reducing slag and ammonium chloride solution are added into a leaching reaction kettle, stirring is started, calcium element in the magnesium reducing slag is extracted and separated, calcium-containing leaching liquor and filter residues are obtained, the filter residues are discharged from a slag outlet, the calcium-containing leaching liquor enters the absorption reaction kettle through a pipeline and a pump and is used as absorption liquor to absorb carbon dioxide in flue gas, the flue gas is contacted with the absorption liquor through a flue gas inlet pipe, stirring is started, after full absorption reaction, calcium carbonate precipitation and ammonium chloride solution are generated, the calcium carbonate precipitation is discharged from the slag outlet, industrial application (such as ink, rubber, paper making and other industries) can be carried out after refining, the ammonium chloride solution enters the leaching reaction kettle from the absorption liquor outlet through the pipeline and the pump and is used for leaching the magnesium reducing slag, recycling of leaching liquor and trapping solvent (absorption liquor) is realized, and finally, tail gas is discharged from a tail gas outlet at the top of the absorption reaction kettle.
The reaction of magnesium reducing slag and ammonium chloride solution in the leaching reactor is as follows:
Ca 2 SiO 4 (s)+4NH 4 Cl→2CaCl 2 +2NH 3 ·H 2 O+SiO 2
the chemical reaction taking place in the absorption reactor is as follows:
CaCl 2 +(NH 4 ) 2 CO 3 →CaCO 3 ↓+2NH 4 Cl
further, a gas distributor is arranged in the absorption reaction kettle and comprises a hollow annular pipe and a connecting pipe arranged on the annular pipe, a plurality of air outlet holes are formed in the annular pipe, one end of the connecting pipe is communicated with the annular pipe, and the other end of the connecting pipe is communicated with an outlet of the flue gas inlet pipe.
Further, a stirrer is further arranged in the absorption reaction kettle, and a pH meter port and a thermometer port are arranged at the middle lower part of the side wall of the absorption reaction kettle.
Further, an eyepiece opening, a liquid level meter opening and a manhole are arranged at the top of the absorption reaction kettle.
Further, a filter screen is arranged at the leaching solution outlet of the leaching reaction kettle.
The beneficial effects are that:
(1) The utility model discloses a flue gas carbon dioxide capture device, which takes ammonium chloride leaching solution of magnesium reducing slag as absorption liquid (capture solvent) for absorbing carbon dioxide in flue gas to generate a calcium carbonate product with economic value, and realizes the permanent storage of carbon dioxide, and the solution after adsorption reaction is rich in ammonium chloride, so that the device can be used as leaching solution of magnesium reducing slag for recycling, solves the problems of high energy consumption and high capture solvent loss commonly existing in the flue gas carbon dioxide capture device in the prior art, and is beneficial to environmental protection.
(2) The flue gas carbon dioxide trapping device can realize the on-site sealing and storage of emission source carbon dioxide according to local conditions, and has wide application prospect.
Drawings
FIG. 1 is a schematic diagram of the structure of a flue gas carbon dioxide capture device of the present utility model;
fig. 2 is a schematic structural view of a gas distributor according to the present utility model.
Detailed Description
The present utility model will be specifically described with reference to examples below in order to make the objects and advantages of the present utility model more apparent. It should be understood that the following text is intended to describe only one or more specific embodiments of the utility model and does not limit the scope of the utility model strictly as claimed.
Example 1
The structure of the flue gas carbon dioxide capturing device is shown in fig. 1, the flue gas carbon dioxide comprises a leaching reaction kettle 1 and an absorption reaction kettle 2, a stirrer 3 is arranged in the leaching reaction kettle, a feed inlet 5 is arranged at the top of the leaching reaction kettle, an inlet 4 is arranged at the upper part of the side wall, a slag outlet 6 and a leaching liquid outlet 7 are arranged at the bottom of the leaching reaction kettle, and a filter screen is arranged at the leaching liquid outlet;
the bottom of the absorption reaction kettle 2 is provided with a slag hole 11, the lower part of the side wall is provided with an absorption liquid outlet 10, the upper part of the side wall is provided with an absorption liquid inlet 15, and the absorption liquid inlet 15 is communicated with the leaching liquid outlet 7 of the leaching reaction kettle 1 through a pipeline and a pump; the top of the absorption reaction kettle 2 is provided with a flue gas inlet and a tail gas outlet 9;
the flue gas carbon dioxide trapping device further comprises a flue gas inlet pipe 8, the flue gas inlet pipe 8 extends into the inner bottom of the absorption reaction kettle 2 through a flue gas inlet of the absorption reaction kettle, a gas distributor 12 is arranged in the absorption reaction kettle 2 and comprises a hollow annular pipe and a connecting pipe arranged on the annular pipe, a plurality of air outlet holes are formed in the annular pipe, one end of the connecting pipe is communicated with the annular pipe, and the other end of the connecting pipe is communicated with an outlet of the flue gas inlet pipe 8.
The absorption reaction kettle is internally provided with a stirrer, the middle lower part of the side wall of the absorption reaction kettle is provided with a pH meter port 14 and a thermometer port 13, the pH value and the temperature of the reaction liquid are conveniently monitored, and the top of the absorption reaction kettle is provided with an eyepiece port, a liquid level meter port and a manhole.
The operation of the flue gas carbon dioxide capturing device of this embodiment is as follows:
firstly adding magnesium reducing slag and ammonium chloride solution into a leaching reaction kettle 1, starting stirring, extracting and separating calcium element in the magnesium reducing slag, finishing leaching reaction, obtaining calcium-containing leaching solution and filter residues, discharging the filter residues from a slag outlet, introducing the calcium-containing leaching solution into an absorption reaction kettle 2 from a leaching solution outlet 7 through a pipeline and a pump, taking the calcium-containing leaching solution as absorption liquid to absorb carbon dioxide in flue gas, fully contacting the flue gas with the absorption liquid through a flue gas inlet pipe 8 and a gas distributor 12, starting stirring, fully absorbing and reacting (determining whether the reaction is complete by testing the pH value of the reaction liquid) to generate calcium carbonate precipitate and ammonium chloride-enriched solution, discharging the calcium carbonate precipitate from the slag outlet, refining the calcium carbonate precipitate, and then carrying out industrial application, wherein the ammonium chloride-enriched solution enters the leaching reaction kettle 1 from an absorption liquid outlet 10 through a pipeline and a pump, recycling the leaching solution and a trapping solvent (absorption liquid) are realized, and finally discharging tail gas from a tail gas outlet 9 at the top of the absorption reaction kettle 2.
The flue gas carbon dioxide capture device of the embodiment takes the ammonium chloride leaching solution of the magnesium reducing slag as the absorption liquid (capture solvent) for absorbing carbon dioxide in flue gas to generate a calcium carbonate product with economic value, so that the permanent storage of carbon dioxide is realized, and the solution after the adsorption reaction is rich in ammonium chloride, so that the device can be used as the leaching solution of the magnesium reducing slag again for recycling, and the problems of high energy consumption and large capture solvent loss commonly existing in the flue gas carbon dioxide capture device in the prior art are solved, and the device is beneficial to environmental protection.
While the embodiments of the present utility model have been described in detail with reference to the drawings, the present utility model is not limited to the above embodiments, and it will be apparent to those skilled in the art that various equivalent changes and substitutions can be made therein without departing from the principles of the present utility model, and such equivalent changes and substitutions should also be considered to be within the scope of the present utility model.
Claims (5)
1. The flue gas carbon dioxide capturing device is characterized by comprising a leaching reaction kettle and an absorption reaction kettle, wherein a stirrer is arranged in the leaching reaction kettle, a feed inlet is arranged at the top of the leaching reaction kettle, an inlet is arranged at the upper part of the side wall, and a slag outlet and a leaching liquid outlet are arranged at the bottom of the side wall;
the bottom of the absorption reaction kettle is provided with a slag hole, the lower part of the side wall is provided with an absorption liquid outlet, the upper part of the side wall is provided with an absorption liquid inlet, and the absorption liquid inlet is communicated with a leaching liquid outlet of the leaching reaction kettle through a pipeline and a pump; the top of the absorption reaction kettle is provided with a flue gas inlet and a tail gas outlet;
the flue gas carbon dioxide trapping device further comprises a flue gas inlet pipe, and the flue gas inlet pipe stretches into the inner bottom of the absorption reaction kettle through a flue gas inlet of the absorption reaction kettle.
2. The flue gas carbon dioxide capturing device according to claim 1, wherein a gas distributor is arranged in the absorption reaction kettle, the gas distributor comprises a hollow annular pipe and a connecting pipe arranged on the annular pipe, a plurality of air outlet holes are arranged on the annular pipe, one end of the connecting pipe is communicated with the annular pipe, and the other end of the connecting pipe is communicated with an outlet of the flue gas inlet pipe.
3. The flue gas carbon dioxide capturing device according to claim 1, wherein a stirrer is further arranged in the absorption reaction kettle, and a pH meter port and a thermometer port are arranged at the middle lower part of the side wall of the absorption reaction kettle.
4. The flue gas carbon dioxide capture device of claim 1, wherein an eyepiece port, a level gauge port and a manhole are provided on the top of the absorption reactor.
5. The flue gas carbon dioxide capture device of any one of claims 1 to 4, wherein a screen is provided at the leach liquor outlet of the leach reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321052160.1U CN220110772U (en) | 2023-05-05 | 2023-05-05 | Flue gas carbon dioxide trapping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321052160.1U CN220110772U (en) | 2023-05-05 | 2023-05-05 | Flue gas carbon dioxide trapping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220110772U true CN220110772U (en) | 2023-12-01 |
Family
ID=88917213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321052160.1U Active CN220110772U (en) | 2023-05-05 | 2023-05-05 | Flue gas carbon dioxide trapping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220110772U (en) |
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2023
- 2023-05-05 CN CN202321052160.1U patent/CN220110772U/en active Active
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