CN115475478A - Symmetrical double-section mercury removal and carbon fixation waste heat recovery integrated device - Google Patents
Symmetrical double-section mercury removal and carbon fixation waste heat recovery integrated device Download PDFInfo
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- CN115475478A CN115475478A CN202211077773.0A CN202211077773A CN115475478A CN 115475478 A CN115475478 A CN 115475478A CN 202211077773 A CN202211077773 A CN 202211077773A CN 115475478 A CN115475478 A CN 115475478A
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- demercuration
- flue gas
- adsorbent
- carbon
- bin
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 89
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 41
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 40
- 239000002918 waste heat Substances 0.000 title claims abstract description 31
- 239000003463 adsorbent Substances 0.000 claims abstract description 79
- 239000003546 flue gas Substances 0.000 claims abstract description 65
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000006243 chemical reaction Methods 0.000 claims abstract description 62
- 239000007787 solid Substances 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002028 Biomass Substances 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 36
- 229910002092 carbon dioxide Inorganic materials 0.000 description 18
- 239000001569 carbon dioxide Substances 0.000 description 18
- 239000002245 particle Substances 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000474 mercury oxide Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 229910000497 Amalgam Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
Abstract
The invention belongs to the field of flue gas, and particularly relates to a symmetrical double-section mercury removal and carbon fixation waste heat recovery integrated device. Comprises a reaction chamber, a demercuration feeding mechanism and a carbon fixing mechanism; the flue gas filtering mechanism divides the reaction chamber into a demercuration reaction bin and a solid carbon reaction bin which are symmetrical, the lower part of the side surface of the demercuration reaction bin far away from the solid carbon reaction bin is connected with a flue gas inlet channel, and the upper part of the side surface is connected with an outlet of the demercuration feeding mechanism; the lower part of the side surface of the carbon fixation reaction bin, which is far away from the demercuration reaction bin, is connected with a flue gas outlet channel, and the upper part of the side surface is connected with an outlet of a carbon fixation mechanism; the lower surface of the reaction chamber upper plate is provided with a plurality of circulating water pipes for recovering waste heat. According to the flue gas purification device, flue gas purification is realized by contacting flue gas with the demercuration adsorbent, carbon emission reduction is realized by contacting the flue gas with the solid carbon adsorbent, and waste heat recycling is realized by collecting waste heat through circulating water in the flue gas circulation process, so that the effects of energy conservation, emission reduction and environment protection are achieved.
Description
Technical Field
The invention belongs to the field of flue gas, and particularly relates to a symmetrical double-section mercury removal and carbon fixation waste heat recovery integrated device.
Background
The artificial mercury emission in China is very high, and most of the artificial mercury emission comes from industrial flue gas, such as coal-fired flue gas released by a coal-fired power plant and non-ferrous metal smelting flue gas released by a non-ferrous metal smelting plant. The mercury has toxicity, volatility, biological enrichment, long-distance migration and the like, and has certain potential safety hazards to human health and environmental safety. Meanwhile, mercury can generate amalgam reaction with the carbon dioxide compression device, so that the device is corroded, and potential safety hazards are caused. At present, the adsorbent demercuration technology is the most widely applied demercuration technology after combustion, and has the advantages of high demercuration efficiency, reproducibility and the like. With the advent of "carbon peak reaching and carbon neutralization" in China, the attention of scholars at home and abroad to carbon dioxide is increasingly strengthened, and carbon dioxide absorption is a way to realize "carbon neutralization" under the background of an era of paying attention to the influence of carbon dioxide on the environment. Meanwhile, the concept of energy conservation and emission reduction is in depth, and the recovery and the reutilization of the waste heat of the flue gas are hot topics.
At present, the existing pollutant control device does not have a mercury and carbon dioxide simultaneous absorption device, mercury or carbon dioxide adsorbed by an adsorbent can be released and recovered under the action of high temperature, and released carbon dioxide can be uniformly compressed and sealed, and because heavy metal element mercury exists in flue gas, the carbon dioxide adsorbent can usually adsorb some mercury, and the mercury can corrode the carbon dioxide compression device, so that the mercury in the flue gas is absorbed very important before the carbon dioxide is absorbed, the device designs that two sections of reaction bins firstly remove mercury and then fix carbon, the heavy metal treatment and carbon emission reduction of the flue gas are realized, and meanwhile, waste heat in the flue gas is recycled.
Disclosure of Invention
The invention aims to provide a symmetrical double-section integrated device for mercury removal and carbon fixation waste heat recovery.
The technical solution for realizing the purpose of the invention is as follows: a symmetrical double-section integrated device for mercury removal and carbon fixation waste heat recovery comprises a reaction chamber, a mercury removal feeding mechanism and a carbon fixation mechanism;
the flue gas filtering mechanism divides the reaction chamber into a demercuration reaction bin and a solid carbon reaction bin which are symmetrical, the lower part of the side surface of the demercuration reaction bin far away from the solid carbon reaction bin is connected with a flue gas inlet channel, and the upper part of the side surface is connected with an outlet of the demercuration feeding mechanism; the lower part of the side surface of the carbon fixation reaction bin far away from the demercuration reaction bin is connected with a flue gas outlet channel, and the upper part of the side surface of the carbon fixation reaction bin is connected with an outlet of a carbon fixation mechanism; the lower surface of the reaction chamber upper plate is provided with a plurality of circulating water pipes for recovering waste heat.
Further, the demercuration feeding mechanism comprises a demercuration bin, a demercuration adsorbent and a screw feeder I;
the demercuration adsorbent is placed in a demercuration bin and conveyed to the demercuration reaction bin through a screw feeder I.
Further, the carbon fixing mechanism comprises a screw feeder II, a carbon fixing adsorbent and a carbon fixing bin;
the solid carbon adsorbent is placed in the solid carbon storage bin and is conveyed to the solid carbon reaction bin through the screw feeder II.
Further, the demercuration adsorbent is ammonium chloride modified biomass coke, activated carbon or transition metal oxide.
Furthermore, the diameter of the flue gas inlet channel does not exceed 1/8 of the height of the reaction chamber, and the distance from the flue gas inlet channel to the bottom of the reaction chamber is 1/8 of the height of the reaction chamber.
Further, the carbon fixing adsorbent is a molecular sieve, mesoporous silica or clay.
Furthermore, the diameter of the flue gas outlet channel does not exceed 1/8 of the height of the reaction chamber, and the distance from the flue gas outlet channel to the bottom of the reaction chamber is 1/8 of the height of the reaction chamber.
Further, the flue gas filtering mechanism is a filter screen arranged in the reaction chamber.
Further, the device also comprises a mercury removal adsorbent recovery device and a solid carbon adsorbent recovery device;
the demercuration adsorbent recovery devices are respectively arranged at the bottoms of the two sides of the flue gas filtering mechanism and are respectively used for recovering the demercuration adsorbent and the solid carbon adsorbent.
Furthermore, a bin gate is arranged on the side surface of the reaction chamber, and the mercury removal adsorbent and the solid carbon adsorbent are recovered by opening and closing the bin gate.
Compared with the prior art, the invention has the remarkable advantages that:
(1) The application provides a solid carbon waste heat recovery integrated device of demercuration can realize the solid carbon of demercuration, does not contain mercury in guaranteeing the flue gas simultaneously before solid carbon, can avoid mercury to corrode the potential safety hazard that carbon dioxide compressor arrangement caused when retrieving carbon dioxide and recycling.
(2) The application provides a solid carbon waste heat recovery integrated device of demercuration realizes flue gas waste heat recovery through setting up circulating pipe for flue gas waste heat realizes recycling, thereby reaches energy saving and emission reduction's effect.
(3) The application provides a demercuration solid carbon waste heat recovery integrated device can realize the cyclic utilization of adsorbent through retrieving demercuration adsorbent and solid carbon adsorbent, and the mercury of retrieving simultaneously and carbon dioxide resource can be recycled.
Drawings
FIG. 1 is a schematic structural view of a symmetrical mercury removal and carbon fixation waste heat recovery integrated device.
The method comprises the following steps of 1-demercuration bin, 2-demercuration adsorbent, 3-screw feeder I, 4-flue gas inlet channel, 5-reaction chamber, 6-demercuration adsorbent recovery device, 7-solid carbon adsorbent recovery device, 8-flue gas outlet channel, 9-screw feeder II, 10-solid carbon adsorbent, 11-solid carbon bin, 12-circulating water pipe I, 13-circulating water pipe II, 14-flue gas filtering mechanism, 15-demercuration reaction bin and 16-solid carbon reaction bin.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
The device is designed with two sections of reaction bins to firstly remove mercury and then fix carbon, thereby realizing heavy metal treatment and carbon emission reduction of the flue gas, and simultaneously recycling waste heat in the flue gas.
The invention discloses a symmetrical double-section mercury removal and carbon fixation waste heat recovery integrated device, which comprises: demercuration feed bin system: the adsorbent is used for containing the adsorbent and providing the adsorbent for demercuration; demercuration spiral feed system: the device is used for conveying the adsorbent in the storage bin, so that the adsorbent is mixed with the flue gas to adsorb mercury in the flue gas; demercuration adsorbent recovery unit: used for recycling the adsorbent and recycled after treatment. The solid carbon device includes: solid carbon feed bin system: the device is used for containing the adsorbent and providing the adsorbent for carbon fixation; solid carbon spiral feed system: the device is used for conveying the adsorbent in the storage bin, so that the adsorbent is mixed with the flue gas to adsorb carbon dioxide in the flue gas; solid carbon adsorbent recovery unit: used for recycling the adsorbent and recycled after treatment. And the flue gas filtering system is used for filtering particle impurities introduced into the solid carbon side from the mercury removal side and preventing the solid carbon adsorbent from being polluted. And the waste heat recovery system is used for collecting the waste heat of the flue gas and exchanging the waste heat of the circulating water and the flue gas.
With reference to fig. 1, the symmetrical double-stage integrated device for mercury removal and carbon fixation waste heat recovery provided by the invention comprises a mercury removal device, a carbon fixation device, a flue gas filtration system, a waste heat recovery system, a mercury removal adsorbent recovery device and a carbon fixation adsorbent recovery device.
The demercuration device comprises the following parts: the demercuration bin system consists of the following parts: the device comprises a demercuration bin 1, a demercuration adsorbent 2, a screw feeder 3, a demercuration reaction bin 15 and a flue gas inlet channel 4; the carbon fixing device comprises the following parts: the device comprises a screw feeder 9, a solid carbon adsorbent 10, a solid carbon bin 11 and a solid carbon reaction bin 16; a flue gas filtering system 14, a flue gas outlet channel 8; the waste heat recovery system consists of the following parts: a circulating water pipe 12, a circulating water pipe 13; a demercuration adsorbent recovery unit 6; and a solid carbon adsorbent recovery device 7.
Flue gas enters a demercuration reaction bin 15 through a flue gas inlet channel 4, the demercuration adsorbent 2 is conveyed to the demercuration reaction bin 15 under the action of a screw feeder 3 to remove mercury in the flue gas, the flue gas after demercuration is filtered to remove possible entrained adsorbent particles and some particulate matter impurities through a flue gas filtering system 14 and enters a solid carbon reaction bin 16, a solid carbon adsorbent 10 conveys the solid carbon adsorbent to the solid carbon reaction bin 16 under the action of a screw feeder 9 to adsorb carbon dioxide in the flue gas, and the flue gas after adsorption is discharged into the atmosphere through a flue gas outlet channel 8. The flue gas carries out waste heat recovery with circulating water pipe 12 and circulating water pipe 13 in the process from flue gas inlet channel 4 to flue gas outlet channel 8. After a certain time, the adsorbent is recovered by the mercury removal adsorbent recovery device 6 and the solid carbon adsorbent recovery device 7, and the adsorbent is recycled after certain treatment.
The demercuration adsorbent is one or more of ammonium chloride modified biomass coke, activated carbon and transition metal oxide, and the particle diameter of the demercuration adsorbent is 150-200 meshes.
The demercuration adsorbent recovery device is characterized in that an openable bin door is installed at the lower end of the demercuration reaction bin, and the adsorbent is recovered by opening and closing the bin door. The adsorbent recovered by the mercury removal adsorbent recovery device can be recycled after being treated by a thermal regeneration method and a chemical regeneration method.
The solid carbon adsorbent is one or more of inorganic solid adsorbents such as molecular sieve, mesoporous silica, clay and the like, and the particle diameter of the solid carbon adsorbent powder is less than 100 microns. The solid carbon adsorbent recovery device is characterized in that an openable bin gate is arranged at the lower end of the demercuration reaction bin, and the adsorbent is recovered through the bin gate.
The solid carbon adsorbent does not contain heavy metal element mercury, so that potential safety hazards caused by mercury corroding the carbon dioxide compression device can be avoided when the carbon dioxide is recycled.
The flue gas filtering system is used for filtering particle impurities introduced from the demercuration side to the solid carbon side to prevent the solid carbon adsorbent from being polluted;
the device can realize integration of mercury removal and carbon fixation waste heat recovery, the device and the method have good mercury removal efficiency and carbon dioxide absorption efficiency, the waste heat recovery realizes energy conservation and emission reduction, and the system equipment is simple and economical.
Claims (10)
1. A symmetrical double-section integrated device for mercury removal and carbon fixation waste heat recovery is characterized by comprising a reaction chamber (5), a mercury removal feeding mechanism and a carbon fixation mechanism;
the flue gas filtering mechanism (14) divides the reaction chamber (5) into a demercuration reaction bin (15) and a carbon fixation reaction bin (16) which are symmetrical, the lower part of the side surface of the demercuration reaction bin (15) far away from the carbon fixation reaction bin (16) is connected with the flue gas inlet channel (4), and the upper part of the side surface is connected with the demercuration feeding mechanism outlet; the lower part of the side surface of the carbon-fixing reaction bin (16) far away from the demercuration reaction bin is connected with a flue gas outlet channel (8), and the upper part of the side surface is connected with an outlet of a carbon-fixing mechanism; the lower surface of the upper plate of the reaction chamber (5) is provided with a plurality of circulating water pipes for recovering waste heat.
2. The device according to claim 1, wherein the demercuration feeding mechanism comprises a demercuration bin (1), a demercuration adsorbent (2) and a screw feeder I (3);
the demercuration adsorbent (2) is placed in the demercuration bin (1) and is conveyed to the demercuration reaction bin (15) through the screw feeder I (3).
3. The device according to claim 2, wherein the carbon fixation mechanism comprises a screw feeder II (9), a carbon fixation adsorbent (10) and a carbon fixation bin (11);
the solid carbon adsorbent (10) is placed in the solid carbon bin (1) and is conveyed to the solid carbon reaction bin (16) through the screw feeder II (9).
4. The device according to claim 3, wherein the demercuration adsorbent (2) is ammonium chloride modified biomass coke, activated carbon or transition metal oxide.
5. The apparatus according to claim 4, characterized in that the diameter of the flue gas inlet channel (4) does not exceed 1/8 of the height of the reaction chamber (5), and the height from the bottom of the reaction chamber (5) is 1/8 of the height of the reaction chamber (5).
6. The device according to claim 5, wherein the solid carbon adsorbent (10) is a molecular sieve, mesoporous silica or clay.
7. The apparatus according to claim 6, characterized in that the diameter of the flue gas outlet channel (8) does not exceed 1/8 of the height of the reaction chamber (5) and the height from the bottom of the reaction chamber (5) is 1/8 of the height of the reaction chamber (5).
8. The apparatus according to claim 1, characterized in that the flue gas filtering means (14) is a filter screen arranged inside the reaction chamber.
9. The apparatus according to claim 1, further comprising a demercuration adsorbent recovery apparatus (6) and a solid carbon adsorbent recovery apparatus (7);
the mercury removal adsorbent recovery devices (6) are respectively arranged at the bottoms of the two sides of the flue gas filtering mechanism (14) and are respectively used for recovering the mercury removal adsorbent and the solid carbon adsorbent.
10. The apparatus of claim 9, wherein the reaction chamber is provided with a door at the side, and the recovery of the demercuration adsorbent and the solid carbon adsorbent is realized by opening and closing the door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211077773.0A CN115475478A (en) | 2022-09-05 | 2022-09-05 | Symmetrical double-section mercury removal and carbon fixation waste heat recovery integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211077773.0A CN115475478A (en) | 2022-09-05 | 2022-09-05 | Symmetrical double-section mercury removal and carbon fixation waste heat recovery integrated device |
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| Publication Number | Publication Date |
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| CN115475478A true CN115475478A (en) | 2022-12-16 |
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| CN202211077773.0A Pending CN115475478A (en) | 2022-09-05 | 2022-09-05 | Symmetrical double-section mercury removal and carbon fixation waste heat recovery integrated device |
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