CN102869798A - System and method for treatment with concentration of the fumes and gases produced by an electrolytic cell during the production of aluminium - Google Patents
System and method for treatment with concentration of the fumes and gases produced by an electrolytic cell during the production of aluminium Download PDFInfo
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- CN102869798A CN102869798A CN2011800195964A CN201180019596A CN102869798A CN 102869798 A CN102869798 A CN 102869798A CN 2011800195964 A CN2011800195964 A CN 2011800195964A CN 201180019596 A CN201180019596 A CN 201180019596A CN 102869798 A CN102869798 A CN 102869798A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/22—Collecting emitted gases
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- 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
- B01D2257/502—Carbon monoxide
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- 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
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- 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
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
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Abstract
The invention relates to a method and system for treating (22) fumes and gas (15) produced by at least one igneous electrolytic cell (2) during the production of aluminium, the fumes and gas comprising carbon dioxide, dust and hydrogen fluoride, and the treatment system (22) comprising: a collection circuit (24) suitable for collecting at least one portion of the fumes and gas (15) produced by the electrolytic cell (2); and a system for cooling (32) the collected fumes and gas (15), characterised in that said system comprises, on the one hand, a treatment path (38) including a treatment unit (30) suitable for filtering the dust and eliminating at least one portion of the hydrogen fluoride and a capturing unit (50) suitable for capturing at least one portion of the carbon dioxide contained in the cooled fumes and gas (15), and on the other hand, a recycling path (40) suitable for recovering a portion of the cooled fumes and gas (15) and for injecting said fumes and gas back into the electrolytic cell (2) in order to increase the concentration of carbon dioxide in the fumes and gas captured by the capturing unit (50).
Description
Technical field
The present invention relates to utilize smog that electrolyzer produces and concentrated treatment system and the method for gas in the process of producing aluminium.
Background technology
Generally, process smog and the gas that electrolyzer produces by the method for filtering with the aluminum oxide dry method and adsorb, to remove hydrogen fluoride and dust.Sometimes follow desulfurized step after this processing.Yet, the carbonic acid gas (less than 1.5%) that the smog of processing by this way and gas still contain lower concentration.
Existing carbon dioxide collection system can not be processed the carbonic acid gas of lower concentration like this.
Summary of the invention
The purpose of this invention is to provide for the treatment of the smog of electrolyzer generation and the system and method for gas, it can concentrate smog and the gas of planting since then electrolyzer and generate CO
2Concentration be higher than 7% gas, this means CO in the gas that generates
2Concentration is higher than existing CO
2The minimum value that treatment technology is required.
For this purpose, the objective of the invention is for the treatment of the smog that produces in the process of producing aluminium by at least a melting salt (" pyrogene ") electrolyzer and the system of gas, described smog and gas comprise carbonic acid gas, dust and hydrogen fluoride, described treatment system comprises:
-be suitable for collecting the collecting loop of at least a portion of smog that electrolyzer produces and gas;
The smog that-cooling is collected and the system of gas;
-process the path, it comprises: be suitable for filtering dust and remove at least a portion being included in hydrofluoric processing unit in smog and the gas; And the capturing unit that is suitable for catching at least a portion carbonic acid gas contained in the smog of cooling and the gas; And be suitable for reclaiming the part of the smog of cooling and gas and it is expelled to electrolyzer again, to improve the smog of being caught by capturing unit and the recovery path of the gas concentration lwevel in the gas.
In some embodiments of the present invention, treatment system comprises one or more following characteristics:
-dust separation system is in the upstream of cooling system;
-dust separation system is in the recirculation path in cooling system downstream;
-sucking the first system of smog and gas, it is positioned in the processing path of capturing unit upstream; Suck the second system of smog and gas, it is positioned in reclaims in the path; And the Controlling System that is used for the first and second suction systems, its adjusting is re-introduced into the flow velocity of the smog of described electrolyzer and gas and smog that capturing unit is caught and the flow velocity of gas;
-electrolyzer comprises the basically lid of Fluid Sealing;
-each electrolyzer comprises the system that at least one is used to distribute smog and the gas of recovery;
-cooling system comprises the heat exchanger that heat-transfer fluid passes through, and wherein treatment system comprises the recovery unit that can reclaim from heat-transfer fluid heat;
-recovery path and/or collecting loop comprise stopping device.
In addition, smog and gas that another object of the present invention produces in the process of producing aluminium for the treatment of at least a melting salt (" pyrogene ") electrolyzer, described smog and gas comprise carbonic acid gas, dust and hydrogen fluoride; Wherein said method may further comprise the steps:
A) collect smog and the gas that electrolyzer produces by at least one collection device;
B) smog and the gas collected by the cooling system cooling;
C) smog and the gas that are cooled off by processing unit processes are to filter dust and to remove at least a portion hydrogen fluoride;
D) catch contained carbonic acid gas in the smog of cooling and the gas by capturing unit;
E) reclaim the smog of cooling and the part of gas, and described part smog and gas are re-introduced in the electrolyzer, to improve the smog of being caught by capturing unit and the gas concentration lwevel in the gas.
In some embodiments, the method comprises following one or more feature:
-the step of dust-separating from the smog collected and gas, described separating step is before the step of cooling smog and gas;
The step of contained dust in the smog of-Separation and Recovery and the gas;
-regulate to be re-introduced into the recovery smog of electrolyzer and the flow velocity of gas, and the step of the flow velocity of the smog of being caught by capturing unit and gas;
-the heat exchanger that flows through by heat-transfer fluid is realized cooling step, and described method also comprises the step that reclaims heat by recovery unit from the heat-transfer fluid of the heat exchanger of flowing through.
Description of drawings
Only as nonrestrictive embodiment, and will understand better the present invention with reference to accompanying drawing by following, wherein:
-Fig. 1 is the sectional view of the treatment system of electrolyzer and first embodiment of the invention;
-Fig. 2 shows the figure of step of the treatment process of first embodiment of the invention;
-Fig. 3 is the sectional view of electrolyzer and treatment system second embodiment of the invention;
-Fig. 4 shows the figure of the step for the treatment of process second embodiment of the invention;
-Fig. 5 is electrolyzer and according to the sectional view of the treatment system of the 3rd embodiment of the present invention;
-Fig. 6 shows the figure according to the step of the treatment process of the 3rd embodiment of the present invention.
The identical mark of identical or similar element use as described below in first, second, and third embodiment for the treatment of system, and only describe once.
Single electrolyzer has been described.Yet treatment system of the present invention is suitable for collecting and processing by dozens of or even hundreds of smog and gases that electrolyzer produces.
Detailed Description Of The Invention
With reference to Fig. 1, treatment system of the present invention comprises fusion electrolysis pond 2, and it comprises parallelepiped container 4, its upper opening with and the bottom support the carbon piece of one or more formation negative electrodes 6.This container 4 comprises electrolytic bath 8, and it is comprised of the aluminum oxide that is dissolved in the sodium aluminum fluoride, and is heated between 950 ℃ and 1000 ℃.One or more anodes immerse in this bath 8.When electric current being applied between anode 10 and the negative electrode 6, alumina decomposition is for the aluminium 12 of the metal bath that forms covered cathode 6 and with each anode 10 reaction and make its progressively oxygen of oxidation.
Regularly from electrolyzer 2, remove aluminium 12.
The top of electrolytic bath 8 is cured, and forms to cover bath 8 and make its heat-insulating shell 14.
The reaction at each anode 10 place can discharge to smog and the gas 15 of the top migration of electrolyzer, described smog and gas comprise pollutent, such as carbon monoxide and carbonic acid gas, sulfurous gas, gaseous hydrogen fluoride (HF), carbon and particle, the dust of aluminum oxide and the compound of fluoridizing.
The decomposition of aluminum oxide can cause the reduction of alumina content in the electrolytic bath 8.When this content was lower than ultimate value, the removable tubular steel axle that is installed between two anodes 10 penetrated shell 14, and aluminum oxide is injected electrolytic bath 8.This axle, hereinafter referred to as a feed appliance 16, can be by transmission mechanism (being preferably pneumatic) the motor-driven shell 14 that penetrates vertically.
The most of smog and the gas 15 that are captured between anode 10 and the shell 14 are emitted by the hole that is penetrated termly shell 14 by a feed appliance 16, and pass the crack that may exist in the shell, finally rest on the lid 20 times on the opening surface of electrolyzer 2.Because lid 20 is not Fluid Sealing, therefore enters from the air of electrolyzer outside and cover 20 times and cool off smog and gas.
Shown in signal among Fig. 1 and part, electrolyzer 2 also comprises for the system 21 that distributes smog and gas.For example, this distribution system 21 is placed in the opening surface of electrolyzer for example and covers between 20.As described below, it can distribute smog and gas in the electrolyzer 2 that reinjects.For example, it for example is made of several pipelines and/or nozzle.
In the first embodiment of the present invention, treatment system 22 comprises for collecting the smog that produced by one or more electrolyzers 2 and the loop 24 of gas, and the first heat exchange loop 26.
Collecting loop 24 comprises: be used for the collection device 28 of smog and gas 15, it can produce lower pressures and suction for 20 times at smog and gas 15 between they and the shell 14 at lid, and the processing unit 30 that is used for these smog and gas 15.
The smog that processing unit 30 is discharged and the amount of the gaseous hydrogen fluoride in the gas 15 are less than 0.5mg/Nm
3The amount of dust is less than 5mg/Nm in the smog that processing unit 30 is discharged and the gas 15
3
At least a portion fluorided alumina of processing smog and gas 15 generations by processing unit 30 is introduced into electrolyzer 2 by a feeder 16.
This heat exchange loop 26 comprises heat exchanger 32 and is used for retrieving recovery unit 34 from the heat of heat-transfer fluid.This heat exchange loop 26 is by the heat-transfer fluid circulation, and the smog of being discharged by collection device 28 in heat exchanger 32 and gas 15 circulation before they pass through processing unit 30.
Heat-transfer fluid by heat exchanger 32 heating can be used to, and for example, produces electricity by ORC (Organic Rankin Cycle) generator.For example, heat-transfer fluid is made of water, oil or rare gas element.
Then, collecting loop 24 branches 36 are processing path 38 (be also referred to as and process pipeline 38) and the recovery path 40 (being also referred to as recovery channel 40) of smog and gas.A recovery Path-collection part, the normally smog of most of cooling and gas and with its electrolyzer 2 that reinjects.For example, reclaiming path 40 is made of the pipeline that is connected to branch 36 and electrolyzer 2.Therefore this recovery concentrated gas also improves wherein CO
2Content.
In the present embodiment, reclaim path 40 and be placed in the downstream of processing unit 30 and the upstream of capturing unit 50.
The first suction system 42 and the second suction system 44 are placed in respectively to be processed path 38 and reclaims path 40.For example, they may comprise fan.
The first suction system 42 and the second suction system 44 are by Controlling System 46 controls, and it can regulate the smog of the electrolyzer 2 that reinjects and flow velocity and the process of gas processed the smog in path 38 and the flow velocity of gas.
Generally speaking: Q
T=Q
Re+ Q
C,
Q wherein
C=Q
F+ Q
R
Q
TBy the first suction system 42 and the smog of the second suction system 44 suctions and the overall flow rate of gas;
Q
ReThe smog that in electrolyzer, reclaims by described the second suction system 44 and the flow velocity of gas;
Q
RThe smog of electrolytic bath 8 generations and the flow velocity of gas;
Q
FIt is the flow velocity of the air from the electrolyzer external suction to inside;
Q
CBy the smog of the first suction system 42 suctions and the flow velocity of gas.
Overall flow rate Q
TApproximate 7000 to 10,000Nm
3/ h/ electrolyzer is by the flow velocity Q of the first suction system 42 suctions
C Approximate Q
T1/10.This flow velocity maximum can be adjusted to Q
T1/2.
Controlling System 46 can improve the flow velocity of the first suction system 42 air amounts, and can stop suction system 44 when lid 20 is opened to change anode 10.
By opening the stopping device 61 that is configured in the collecting loop 24 fully, Controlling System 46 can improve the air velocity that is sucked by the first suction system 42, and, when the lid 20 on the electrolyzer is opened to change anode 10, can closes fully and be placed in the stopping device 60 that reclaims path 40.Stopping device 60 and 61 can be valve or dividing plate.For example, they are by Controlling System 46 controls.
If the flow velocity that is sucked by the first suction system 42 and the second suction system 44 is stable, is not the perfect fluid sealing even cover so 20, also can control the air velocity that is drawn into electrolyzer 2 inside from the outside.
In fact, Q
F=Q
T-Q
Re-Q
R
Work as Q
T＞Q
Re, slight negative pressure is kept and during from the smog that reclaims path 40 and gas well distributed in the top of electrolyzer, for the electrolyzer that is equipped with standard cap, and the risk minimization that smog and gas are overflowed laterally from the inboard of electrolyzer 2.
As a kind of modification, the treatment system 22 of first embodiment of the invention does not comprise Controlling System 46.In this case, lid 20 is attached to each other in basically airtight mode, thereby the restriction air is from electrolyzer 2 outside introducings.In order to reach this purpose, for example, lid 20 is crooked and is surrounded by the liner that can bear high temperature.Therefore, therefore the sealing of electrolyzer 2 is reinforced, and escapes into beyond the electrolyzer so that the outside air that sucks minimizes and prevent to derive from the smog and the gas that reclaim path 40.
Processing path 38 comprises the gas purifier 48 based on seawater or alkaline solution, or some can be by absorbing and the smog of chemical reaction Transformatin unit 30 discharges and the sulfurous gas (SO in the gas 15
2) other system, be used for catching the capturing unit 50 of carbonic acid gas, be used for taking away through the residual smog of pure qi (oxygen) and the flue 52 of gas.
When they left gas purifier 48, the sulfurous gas that smog and gas 15 comprise was less than 30mg/Nm
3
Therefore, reclaim the upstream that path 40 is placed in capturing unit 50.
Collect smog and gas 15 with the aluminium of being produced 70,000 to 100 per ton, 000Nm by collection device 28
3Speed be inhaled into.They contain 200-500mg/Nm
3Dust, 150-400mg/Nm
3Gaseous hydrogen fluoride, 1.5-4g/Nm
3Sulfurous gas, 100-200g/Nm
3Carbonic acid gas and 10-16g/Nm
3Carbon monoxide.
With reference to Fig. 2, the treatment process of first embodiment of the invention starts from step 100, wherein collects smog and gas 15 by collection device 28.
In step 102, the smog of collection and gas 15 are by heat exchanger 32.Make smog and gas 15 coolings.Simultaneously, by the smog of heat exchanger 32 and the heat-transfer fluid in the gas heat hot exchange loop 26.
Then, in step 104, processing unit 30 is by filtering out dust and removing most gaseous hydrogen fluoride and process smog and gas.The fluorided alumina that then, will be produced by processing unit 30 through at least part of by a feeder 16 electrolytic bath 8 that reinjects.
In step 106, with a part, normally most smog and gas 15 of being discharged by processing unit 30 is drawn into recovery path 40 by the second suction system 44.Then electrolyzer 2 reinjects this part smog and gas.The top that this part smog that will process in step 104 by distribution system 21 and gas 15 are distributed in electrolyzer.This part smog and gas 15 by heat exchanger 32 coolings make smog and gas 15 coolings of discharging from electrolytic bath 8.This part smog and the gas electrolyzer that reinjects has improved CO in the smog collected by collection device 28 and the gas 15
2Concentration.Its result makes the CO from these gas and smog
2Catch 50 and become easily, and can greatly reduce to process the size of sulphur dioxide treatment device 48, by processing path 38 and the first suction system 42, it can process the common smaller portions of the overall flow rate of discharging electrolyzer.
In step 108, by gas purifier 48 via the part sulfurous gas in absorption and chemical reaction removal smog and the gas 15.
In step 110, by absorbing or other technologies (membrane filtration) partial CO 2 that capturing unit 50 is removed in smog and the gas 15.
At last, in step 112, taken away by flue 52 from smog and gas 15 that capturing unit 50 is discharged.
In step 114, it occurs in step 100 between 112, and Controlling System 46 can be regulated the flow velocity of the smog that is re-introduced into electrolyzer 2 and gas and be brought gas purifier 48 into and the smog of capturing unit 50 and the flow velocity of gas.Therefore, Controlling System 46 can be controlled the smog of processing in the processing path 38 and the concentration of contaminants in gas.
Advantageously, recovery path 40 can be cooled off smog and the gas of being discharged by electrolytic bath 8 and be improved by the smog of processing path 38 processing and the concentration of contaminants in gas (particularly carbonic acid gas).
Advantageously, treatment system 22 can reduce the size of gas purifier 48.
Advantageously, treatment system 22 can reduce to process the duct size of path 38 and flue 52.
Advantageously, treatment system 22 can be by the use recovered energy of heat exchanger 32.
As shown in Figure 3, the treatment system 54 of second embodiment of the invention is similar to the treatment system of the first embodiment, but except following: have the dust separation system 56 in the collection path 24 that is placed in interchanger 32 upstreams, and processing unit 30 is to process the part in path 38 rather than collecting loop 24, and branch 36 is positioned at the upstream of processing unit 30.Therefore, in unit 30, reclaim a large amount of smog and gas before the processing.
Its result, recovery path 40 in the present embodiment is placed in the upstream of processing unit 30 and capturing unit 50.
Advantageously, embodiments of the present invention have reduced the dirt in the heat exchanger 32.
Advantageously, treatment system 2 can reduce the size 20 of gas purifier 48.
With reference to Fig. 4, treatment process second embodiment of the invention starts from the step 100 of collecting smog and gas 15 by collection device 28.
Then, in step 101, separation system 56 is dust-separating from smog and gas.
In step 102, smog and the gas 15 of being discharged by separation system pass through heat exchanger 32.Cooling smog and gas 15 also adds hot heat transfer fluid.
Then, in step 106, in reclaiming path 40, reclaim a part of being discharged by heat exchanger 32, common most of smog and gas by the suction of the second suction system 44.Then, this part smog and gas are re-introduced into electrolyzer 2.
At last, in step 104, by filtering out dust and removing most gaseous hydrogen fluoride, processing unit 30 is processed smog and the gas that is sucked by the first suction system 42.Fluorided alumina is then injected in the electrolytic bath 8.
Second embodiment of the invention, the step 108 for the treatment of process to the step 108 of step 114 and the treatment process of first embodiment of the invention to 114 identical.
As shown in Figure 5, except dust separation system 56 is arranged on the recovery path 40 rather than collecting loop 24 in heat exchanger downstream, similar to treatment system second embodiment of the invention according to the treatment system 58 of the 3rd embodiment of the present invention.
Advantageously, this can prevent that dust from returning electrolyzer.
With reference to figure 6, the situation after filtration step 101 occurs in the step 102 of cooling off smog and gas and the step 106 that reclaims smog and gas in reclaiming path 40, similar to treatment process second embodiment of the invention according to the treatment process of the 3rd embodiment of the present invention.
In this manual, term " recovery " refers to a part, is generally most smog and gas and is re-introduced in the electrolyzer, but might not mean before the electrolyzer that reinjects these smog and gas are processed.
Claims (17)
1. treatment system (22,54,58), be used for smog and gas (15) that at least one fusion electrolysis pond (2) produces when producing aluminium, described smog and gas comprise carbonic acid gas, dust and hydrogen fluoride, and described treatment system (22,54,58) comprising:
-collecting loop (24) is suitable for collecting at least a portion smog and the gas (15) that described electrolyzer (2) produces;
-for the system (32) of cooling off collected smog and gas (15);
Wherein, described treatment system comprises processes path (38), and it comprises: processing unit (30), and it is suitable for contained at least a portion hydrogen fluoride in the smog that filters dust and remove cooling and the gas; Capturing unit (50), it is suitable for catching the smog of cooling and at least a portion carbonic acid gas in the gas (15); Reclaim path (40), it is suitable for reclaiming the part of the smog of cooling and gas and with its electrolyzer that reinjects (2), thereby improves the smog of being caught by capturing unit (50) and the concentration of carbon dioxide in gas.
2. treatment system as claimed in claim 1 (22) wherein reclaims path (40) and is placed in the downstream of processing unit (30) and the upstream of capturing unit (50).
3. treatment system as claimed in claim 1 (54) wherein reclaims the upstream that the path is placed in processing unit (30) and capturing unit (50).
4. such as claim 1 or 3 described treatment systems (54), comprise the dust separation system (56) that is placed in cooling system (32) upstream.
5. such as claim 1 or 3 described treatment systems (58), comprise the dust separation system (56) in the recovery path (40) that is placed in cooling system (32) downstream.
6. such as each described treatment system of claim 1 to 5 (22,54,58), comprise the first system (42) that is used for sucking smog and gas in the processing path (38) that is placed in capturing unit (50) upstream; Be placed in the second system (44) that is used for sucking smog and gas (15) that reclaims in the path (40); And the Controlling System (46) that is used for (44) of the first (42) and second suction system, it is suitable for adjusting and is re-introduced into the flow velocity of the smog of described electrolyzer (2) and gas (15) and smog that capturing unit (50) is caught and the flow velocity of gas (15).
7. such as each described treatment system of claim 1 to 6 (22,54,58), comprise at least one electrolyzer (2), it comprises the lid (20) with the sealing of fluid sealing mode basically.
8. such as each described treatment system of claim 1 to 6 (22,54,58), comprise at least one electrolyzer (2), it comprises the system (21) that at least one is used to distribute smog and the gas (15) of recovery.
9. such as each described treatment system of claim 1 to 8 (22,54,58), wherein said cooling system (32) comprises the heat exchanger that heat-transfer fluid passes through, and wherein said treatment system (22,54,58) comprises the recovery unit (34) that is suitable for reclaiming from heat-transfer fluid heat.
10. such as claim 1 to 9 treatment system (22,54,58) as described in each, wherein reclaim path (40) and/or collecting loop (24) and comprise stopping device (60,61)
11. the smog that produces in producing the process of aluminium for the treatment of at least one fusion electrolysis pond (2) and the method for gas (15), described smog and gas comprise carbonic acid gas, dust and hydrogen fluoride, said method comprising the steps of:
A) collect smog and the gas (15) that (100) are produced by described electrolyzer (2) by at least one collection device (28);
B) smog and the gas collected by cooling system (32) cooling (102);
Wherein said method is further comprising the steps of:
C) process smog and the gas that cool off (104) by processing unit (30), to filter dust and to remove at least a portion hydrogen fluoride;
D) catch the smog of (110) cooling and the carbonic acid gas in the gas (15) by capturing unit (50);
E) reclaim the part of the smog of (106) cooling and gas (15) and it is re-introduced into electrolyzer (2), to improve smog that capturing unit catches and the gas concentration lwevel in the gas.
12. treatment process as claimed in claim 11, wherein said recycling step (106) are at treatment step (104) afterwards and catch step (110) and carry out before.
13. treatment process as claimed in claim 11, wherein said recycling step (106) are at treatment step (104) before and catch step (110) and carry out before.
14. such as claim 11 and 13 each described treatment processs, it comprises dust separation step (101), it is for separating of collected smog and the dust in the gas, and described separating step carries out before in the step (102) of cooling smog and gas (15).
15. such as claim 11 and 13 each described treatment processs, it comprises dust separation step (101), it is for separating of the dust in the smog that reclaims and the gas.
16. such as each described treatment process of claim 11 to 15, the method comprises for regulating and reclaiming and the smog of the electrolyzer that reinjects (2) and the flow velocity of gas, and the step (114) of the flow velocity of the smog of catching by capturing unit (50) and gas.
17. such as each described treatment process in the claim 11 to 16, the heat exchanger (32) that wherein said cooling step (102) flows through by heat-transfer fluid realizes that described method also comprises the step (102) that is reclaimed heat by recovery unit (34) from the heat-transfer fluid that flows through described heat exchanger (32).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1053112 | 2010-04-23 | ||
| FR1053112A FR2959137B1 (en) | 2010-04-23 | 2010-04-23 | SYSTEM AND METHOD FOR THE TREATMENT WITH CONCENTRATION OF SMOKE AND GAS PRODUCED BY AN ELECTROLYTIC TANK IN THE MANUFACTURE OF ALUMINUM |
| PCT/FR2011/050896 WO2011131901A1 (en) | 2010-04-23 | 2011-04-19 | System and method for treatment with concentration of the fumes and gases produced by an electrolytic cell during the production of aluminium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102869798A true CN102869798A (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800195964A Pending CN102869798A (en) | 2010-04-23 | 2011-04-19 | System and method for treatment with concentration of the fumes and gases produced by an electrolytic cell during the production of aluminium |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN102869798A (en) |
| FR (1) | FR2959137B1 (en) |
| NO (1) | NO20121033A1 (en) |
| WO (1) | WO2011131901A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141155A (en) * | 2014-07-10 | 2014-11-12 | 湖州织里荣华铝业有限公司 | Electrolytic aluminum exhaust gas treatment device |
| CN107502922A (en) * | 2017-10-23 | 2017-12-22 | 常宁市华兴冶化实业有限责任公司 | A kind of system and method for electrolytic aluminium waste gas disposal |
| CN109423662A (en) * | 2017-08-28 | 2019-03-05 | 沈阳铝镁设计研究院有限公司 | The cooling of aluminum electrolytic residual electrode carbon block and the device and application method for collecting exhaust gas |
| CN112122294A (en) * | 2020-09-17 | 2020-12-25 | 郑州轻冶科技股份有限公司 | Aluminum electrolysis residual anode cooling and purifying device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9234286B2 (en) * | 2012-05-04 | 2016-01-12 | Alstom Technology Ltd | Recycled pot gas pot distribution |
| FR3029537B1 (en) * | 2014-12-08 | 2016-12-09 | Rio Tinto Alcan Int Ltd | ELECTROLYSIS FACTORY AND METHOD FOR TREATING TANK GASES |
| CN108854505A (en) * | 2018-06-17 | 2018-11-23 | 曾文飞 | A kind of electrolytic aluminium waste Flash Gas Compression Skid System and processing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5832712A (en) * | 1994-02-15 | 1998-11-10 | Kvaerner Asa | Method for removing carbon dioxide from exhaust gases |
| US6655150B1 (en) * | 1999-02-19 | 2003-12-02 | Norsk Hydro Asa | Method for removing and recovering CO2 from exhaust gas |
| DE102007043331A1 (en) * | 2007-08-16 | 2009-02-19 | Hitachi Power Europe Gmbh | Cooled NaOH flue gas scrubber |
| WO2010033037A1 (en) * | 2008-09-19 | 2010-03-25 | Norsk Hydro Asa | A device for collection of hot gas from an electrolysis process, and a method for gas collection with said device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2848875B1 (en) * | 2002-12-18 | 2005-02-11 | Pechiney Aluminium | METHOD AND DEVICE FOR TREATING ELECTROLYTIC CELL EFFLUENTS FOR ALUMINUM PRODUCTION |
-
2010
- 2010-04-23 FR FR1053112A patent/FR2959137B1/en active Active
-
2011
- 2011-04-19 CN CN2011800195964A patent/CN102869798A/en active Pending
- 2011-04-19 WO PCT/FR2011/050896 patent/WO2011131901A1/en active Application Filing
-
2012
- 2012-09-14 NO NO20121033A patent/NO20121033A1/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5832712A (en) * | 1994-02-15 | 1998-11-10 | Kvaerner Asa | Method for removing carbon dioxide from exhaust gases |
| US6655150B1 (en) * | 1999-02-19 | 2003-12-02 | Norsk Hydro Asa | Method for removing and recovering CO2 from exhaust gas |
| DE102007043331A1 (en) * | 2007-08-16 | 2009-02-19 | Hitachi Power Europe Gmbh | Cooled NaOH flue gas scrubber |
| WO2010033037A1 (en) * | 2008-09-19 | 2010-03-25 | Norsk Hydro Asa | A device for collection of hot gas from an electrolysis process, and a method for gas collection with said device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141155A (en) * | 2014-07-10 | 2014-11-12 | 湖州织里荣华铝业有限公司 | Electrolytic aluminum exhaust gas treatment device |
| CN109423662A (en) * | 2017-08-28 | 2019-03-05 | 沈阳铝镁设计研究院有限公司 | The cooling of aluminum electrolytic residual electrode carbon block and the device and application method for collecting exhaust gas |
| CN107502922A (en) * | 2017-10-23 | 2017-12-22 | 常宁市华兴冶化实业有限责任公司 | A kind of system and method for electrolytic aluminium waste gas disposal |
| CN112122294A (en) * | 2020-09-17 | 2020-12-25 | 郑州轻冶科技股份有限公司 | Aluminum electrolysis residual anode cooling and purifying device |
Also Published As
| Publication number | Publication date |
|---|---|
| NO20121033A1 (en) | 2012-12-17 |
| WO2011131901A1 (en) | 2011-10-27 |
| FR2959137B1 (en) | 2015-07-03 |
| FR2959137A1 (en) | 2011-10-28 |
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Application publication date: 20130109 |