CN111356788A - Apparatus for collecting and removing gas in aluminum reduction cell - Google Patents
Apparatus for collecting and removing gas in aluminum reduction cell Download PDFInfo
- Publication number
- CN111356788A CN111356788A CN201880074515.2A CN201880074515A CN111356788A CN 111356788 A CN111356788 A CN 111356788A CN 201880074515 A CN201880074515 A CN 201880074515A CN 111356788 A CN111356788 A CN 111356788A
- Authority
- CN
- China
- Prior art keywords
- gas
- cap
- height
- additional
- reduction cell
- Prior art date
- 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.)
- Granted
Links
Images
Classifications
-
- 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
Abstract
The present invention relates to the production of aluminium in a reduction cell having a baked anode. An apparatus includes a gas piping system and a gas collection cap. Each of the caps is connected to a horizontal gas conduit by a first passage to form a primary deaeration circuit and to an additional gas conduit by a second passage to form an additional deaeration circuit. The height of each subsequent channel of the main circuit is increased by 16% to 24% of the height of the previous channel, and the height of each subsequent channel of the additional circuit is increased by 24% to 26% of the height of the previous channel. A divider plate is mounted inside the cap. The length of each subsequent plate is reduced by 25% to 35% relative to the preceding plate. The technical effect is to reduce the amount of gas removed from the reduction cell and maintain the degassing efficiency.
Description
Technical Field
The present invention relates to nonferrous metallurgy, and in particular to the production of aluminium in reduction cells with prebaked anodes, and can be used to reduce the amount of gas removed from the reduction cell while maintaining high removal efficiency between and during normal operation when the reduction cell is open (i.e. the hood is opened).
Background
A device is known in which the gas collecting cap is in contact with the housing at the opening of the housing. The object of the invention is to collect the off-gas from the reduction tank in order to remove the off-gas from the aluminum fluoride compound (patent US 4,770,752, 1988).
Disadvantages of the known apparatus include the limitations of the described invention related to the maintenance of the alumina feed system located within the cap and the possible damage during anode replacement due to the cap being located close to the anode and the housing.
An apparatus is known in which a standard amount of process gas is removed between normal operations, and an increased amount of process gas is removed by actuating an additional exhaust fan when the anode casing cover is opened. A divider wall is installed inside the hood to direct the flow upwards into the gas channels to reduce emissions into the potroom (potfrom) (patent No. RU2251593C2, IPCC25C3/20, publication date: 11/15/2000).
A disadvantage of similar arrangements is that when opening the reduction cell, the air flow drawn in under the hood moves the electrolysis gases along the reduction cell and creates a stagnation zone of increased concentration of electrolysis gases under the bottom flange of the collector beam. In these areas, gas escapes into the working area of the potroom through the gaps between the anode rods and the flange and through the gaps between the covers.
As disclosed in patent RU 2553137, C25C3/22, published as 10/h 06/2015, there is known an apparatus for collecting and removing gases from an aluminium reduction cell, comprising a collector beam with top and bottom stiffening rings and double vertical walls, between which, in the top of the collector beam along the vertical walls, a main gas duct channel of variable cross-section is formed with a collector (confusor) located above the anode along the longitudinal axis of the collector beam, one end being fixed to the cowling inlet and the other end having an opening at the bottom stiffening ring, the height of the main gas duct channel increasing towards the end of the collector beam connected to a gas stripping system. Two additional gas duct channels of variable cross-section are positioned symmetrically with respect to the longitudinal axis of the collector beam between the top stiffening ring and the bottom stiffening ring, these gas duct channels being connected to the bottom stiffening ring with a louvered (shutter) equipped concentrator, and being positioned above the anode along the longitudinal axis between the concentrators of the main gas duct channels, wherein each main gas duct channel has a concentrator mounted at the front side in the metal extraction area.
The disadvantage of the provided arrangement is that a local increase of sparsity in the anode replacement area is provided in the arrangement without equalizing the sparsity under the whole cover. To this end, additional gas ducts are included, which are connected to an accumulator equipped with automatic shutters. Through these openings, the door for anode replacement is removed and a large amount of air is drawn under the hood, forming and propagating vortices under the entire hood. As a result, the collectors in other areas of the hood cannot manage the removal of the gases and the gases escape into the potroom through leaks in the hood. The provided arrangement does not ensure effective degassing during anode replacement.
The closest invention to the claimed invention is, in terms of technical essence, a device for collecting the hot off-gases occurring during the reduction process disclosed in patent WO 2010/033037a1, IPCC25C3/22, published 3/25/2010, which was selected as prior art. In this arrangement, the degassing cap is located directly above the housing opening and ensures high CO2In increased concentration andlower total gas amounts are removed from the reduction tank at temperatures to reduce the number of gas stripping units and increase the heat exchange potential. In addition, the gas collecting cap has at least two inlets, i.e. the gas collecting cap has a double wall. The inlet velocity between the double walls significantly exceeds the velocity at the center of the cap to provide additional air flow (draft) which creates an artificial air wall, thereby ensuring more efficient collection of exhaust gases and reducing interference from cross flow.
Disadvantages of the prior art devices:
the prior art cap design ensures efficient removal of electrolytic gas by double walls, which create artificial air walls and reduce interference from cross flow. In such a case, the displacement of the cap away from the breaker would render degassing inefficient, and positioning the cap immediately above the housing opening would cause damage to the control mechanisms for reducing the flow of the trough reflector and feeder during operation in aggressive environments.
The desired range for the cap to be positioned over the housing is 10mm to 1000mm, determined by the rate of alumina residue and the possibility of replacing the anode. In order to meet this requirement, the mounting height of the cap should be changed for different operations, which affects the tightness of the means for removing gas.
Effective degassing from the reduction cell requires that an equal amount of gas be removed from all caps positioned below the hood of the reduction cell. This requires equal sparsity at each cap entrance; however, the prior art devices do not have a system for controlling uniform intake of air under the hood of the reduction cell.
In the device disclosed in WO 2010/033037, the cap for process gas collection may be mounted beside the feeder instead of being an integral part of the feeder. In this case, most of the gas will be sucked in at the periphery of the cap; however, this requires uniform air intake along the length of the base of the cap.
When the anodes are replaced, the hood door is opened and the air sucked through the opening formed creates vortices that move the gas into one end of the reduction tank, so that the cap of this area cannot manage the removal of the increased amount of gas. Furthermore, the air wall prevents the intake of cross-air flow, which is formed by large slits formed in the housing from which the electrolyte of the anode is removed.
Thus, the prior art devices do not ensure effective removal of the electrolysis gases between and during normal operation of the reduction cell operation. Furthermore, equipment positioned below the shroud is subject to high stresses from the erosive environment.
Disclosure of Invention
The present invention aims to reduce the heat loss of the off-gas from the reduction tank and to relieve the stress on the gas stripping unit while maintaining the degassing efficiency.
The stress on the gas stripping facility is determined by the amount of gas removed from the reduction tank. The total amount of gas removed from the reduction cell with the baked anode was 3000nm3H to 20000nm3In which only 1% to 2% of the total amount is electrolysis gas and the remainder is air. The efficiency of gas removal from the reduction cell is determined by the efficiency factor of the system that removes gas from the reduction cell. This value is usually 98%.
The technical result of the claimed invention is that the total amount of gas removed from the reduction tank is reduced by several times due to the reduced amount of air, while ensuring the following conditions.
1. The efficiency factor of the degassing system is maintained at 98% or higher between and during normal operation of the reduction cell operation.
2. The aggressive environment does not impose increased stresses on equipment positioned beneath the shroud.
In order to ensure the first condition, the technical solution provided maintains the uniformity of the inlet air along the length of the reduction tank enclosure and along the length of the base of each gas collecting cap, between the regular operations of the reduction tank operation.
To ensure the second condition, the collecting caps are positioned so that the means for feeding the alumina are outside the intake zone, while for said positioning-outside the intake zone, the design of the caps ensures a uniform intake along the length of the base of each collecting cap.
In one of the embodiments, the problem posed is solved by an apparatus for collecting and removing gases in an aluminium reduction cell, comprising: a gas piping system comprising a horizontal main gas pipe and an additional gas pipe configured to cut in/out the main gas pipe and the additional gas pipe; and gas collection caps, wherein each gas collection cap is connected to the horizontal main gas conduit by a first channel to form a main degassing circuit and to the additional vertical gas conduit by a second channel to form an additional degassing circuit. The height of each subsequent first passage of the primary circuit increases along the gas flow by 16% to 24% of the height of the previous first passage, and the height of each subsequent second passage of the additional circuit increases along the gas flow by 24% to 26% of the height of the previous second passage. A separator plate is mounted at the bottom of the inner surface of the longitudinal side of the at least one gas collecting cap in the direction of the gas flow, the separator plate having a length of not more than 50% of the height of the gas collecting cap, wherein at least two separator plates are mounted symmetrically on each side of the central axis of the gas collecting cap and the length of each subsequent plate in the direction of the central axis of the cap is reduced by 25% to 35% relative to the preceding plate.
According to one embodiment of the proposed invention, the cap is made in the form of a concentrator.
According to one embodiment of the proposed invention, the main circuit and the additional circuit are combined at the top of the cap.
According to one embodiment of the proposed invention, the distance between the separator plates is at least 15% of the length of the base of the collecting cap.
Additionally, there is provided a system for collecting and removing gases in an aluminium reduction cell, the system comprising: a reduction cell comprising at least an anode and an electrolyte shell breaker; a cover of the reduction tank, the cover being constituted by a removable cover; a gas piping system comprising a horizontal main gas pipe and an additional gas pipe configured to cut in/out the main gas pipe and the additional gas pipe; and a gas collection cap positioned below the hood of the reduction cell, between the electrolyte shell breakers, along the longitudinal axis of the reduction cell to form a gas entry area at the center of the reduction cell. A guide element mounted horizontally inside the removable cover with respect to the electrolyte housing and configured to guide the gas flow into the gas intake area; wherein each of the gas collection caps is connected to the horizontal main gas conduit by a first channel to form a main degassing circuit and to the additional vertical gas conduit by a second channel to form an additional degassing circuit. The height of each subsequent first passage of the primary circuit increases along the gas flow by 16% to 24% of the height of the previous first passage, and the height of each subsequent second passage of the additional circuit increases along the gas flow by 24% to 26% of the height of the previous second passage. A separator plate is mounted at the bottom of the inner surface of the longitudinal side of the at least one gas collection cap in the direction of gas flow, the separator plate having a length no greater than 50% of the height of the gas collection cap. At least two separator plates are symmetrically mounted on each side of the central axis of the collecting cap, the length of each subsequent plate being reduced by 25% to 35% in the direction of the central axis of the cap with respect to the preceding plate.
According to one embodiment of the proposed invention, the gas collection cap in the system is positioned above the electrolyte housing at a distance equal to 0.5 to 1.5 of the height of the new anodes of the reduction cell.
According to one embodiment of the proposed invention, the height of the cap with respect to the electrolyte level is equal to 1.5 to 2 of the height of the new anode.
In addition, a reduction cell is provided that includes the above-described apparatus for collecting and removing gases in an aluminum reduction cell.
The embodiments set forth herein are not the only possible embodiments. Various modifications and improvements are envisaged without departing from the scope of the invention as defined by the independent claims.
Drawings
The essence of the invention is illustrated by the following figures.
Figure 1 shows a general view of a reduction cell including means for collecting and removing gas.
Figure 2 shows the arrangement of the elements of the structure for collecting and removing the gas inside the reduction cell.
Figure 3 shows the elements of the primary and additional deaeration circuits.
Fig. 4 shows an embodiment of a guide element in the form of a projection of the device for collecting and removing gases (cross-sectional view of the reduction cell).
Fig. 5 shows an embodiment of a guide element made in the form of a plate (cross-sectional view of the reduction cell) of the device for collecting and removing gases.
Figure 6 shows the arrangement of the separator plates in the collecting cap (cross-sectional view of the cap).
Fig. 7 shows a longitudinal view of the primary deaeration circuit with the gas collecting cap and the additional deaeration circuit.
Detailed Description
The apparatus for collecting and removing gas is installed in the reduction tank. A reduction cell is a plant for producing aluminium by reducing a melt, and generally comprises an anode, a point alumina feeder with a crusher, a collector beam with a gas duct and a gas collecting cap, and a hood. All structural elements of the claimed device are fixed to the collector beam 1. The cover of the reduction cell 2 is made of a separate cover, inside which the guide element 3 is mounted firmly horizontally in relation to the electrolyte envelope of the melt. The guide elements may be structurally made in the form of plates or projections (fig. 4 and 5) made of the material used to make the cover, such as aluminum. The number of guide elements is determined by the velocity of the flow between the guides and it is necessary to ensure that the gas flow velocity is higher than 2m/s and lower than 7m/s in order to exclude gases escaping from the reduction cell and to carry the alumina away from the shell surface. The position and length of the guide elements are determined by the configuration of the shroud and the uniform flow provided around the anode.
The gas collection cap 4 is positioned along the longitudinal axis of the reduction cell below the hood of the reduction cell, between electrolyte shell breakers above the anodes 5 and between breakers 6 to form a gas inlet zone in the center of the reduction cell.
Each gas collection cap 4 is connected to a horizontal main gas duct 9 by a first channel 8 to form a main degassing circuit and to an additional vertical gas duct 10 by a second channel 8' to form an additional degassing circuit (fig. 3). The height of each subsequent first passage of the primary circuit increases along the gas flow by 16% to 24% of the height of the previous first passage, and the height of each subsequent second passage of the additional circuit increases along the gas flow by 24% to 26% of the height of the previous second passage. The main horizontal gas duct 9 and the additional horizontal gas duct 10 are connected to an electrolysis plant degassing system (not shown).
A separator plate is mounted at the bottom of the inner surface of the longitudinal side of the at least one gas collection cap in the direction of gas flow, the separator plate having a length of no more than 50% of the height of the gas collection cap (fig. 7). The separator plates are firmly fixed on either side of the central axis of the collecting cap, the length of each subsequent plate being reduced by 25% to 35% in the direction of the central axis of the cap with respect to the preceding plate. The plates are symmetrically positioned with respect to the central axis of the cap to ensure the same air intake conditions along the length of the cap base. The number of plates needs to be at least two on each side of the central axis to eliminate stagnation areas in the cap. The divider plate installed in this way divides the volume of the cap into regions (channels) having equal velocities at the base of the cap, without forming stagnation regions through which gas is not removed, to ensure the same intake efficiency at the center and periphery of the cap. The width of each parallel channel should preferably be at least 15% of the length of the cap base. The effect obtained allows positioning the cap between the crushers with the means for feeding alumina outside the gas intake zone and therefore with a minimum of stress from the aggressive environment.
The inventors have unexpectedly found that the effect of uniform air intake at the base of the cap cannot be obtained for different plate positions and sizes.
Thus, an increase in the length of the plate or directing the plate towards the centre of the cap results in collision of the flows from the channels and thus a positive pressure zone is formed. In this case, the gas escapes back into the hood. Positioning the plate on top of the cap results in increased speed in withdrawing the cap. As a result, the aerodynamic resistance of the cap increases and therefore the stress on the gas stripping resistance also increases. Since in this case, regions of different degrees of sparseness are formed at the cap inlet, the intake unevenness at the cap base also increases. Furthermore, an air wall similar to that in prior art devices may be formed to prevent gas ingress at the periphery of the cap.
The gas collection cap 4 is mounted over the electrolyte housing, for example, at a distance equal to 0.5 to 1.5 of the height of the new anode, and the height of the hood is equal to 1.5 to 2.0 of the height of the new anode. An increase in hood height will increase the amount of air in the removed gas, and degassing will require sparsity to increase to the level present in currently designed reduction cells, where the stress of the gas stripping plant is increased and heat losses are increased. In case of a reduction in the amount, the anode cannot be replaced.
In one of the embodiments devised in the course of the development of the invention, the gas-collecting cap is made in the form of a concentrator, which is a device in which the channels are gradually narrowed, which increases the speed of the gas to be removed and reduces the loss of energy spent on degassing. The cap height was 800mm and the base length was 1800mm and the base width was 170 mm. The divider plates were fixed at a height of 30mm from the cap base and oriented along the side walls, forming parallel channels for the air flow. The length of the first plate is 400mm, which is 50% of the height of the cap. The second and third plates are 260mm and 170mm in length, respectively. The rectangular shape of the base of the cap is defined by the positioning mechanism required to perform the anode replacement and feed the alumina under the hood, the cap covering the entire space in the center of the reduction cell between the anodes, excluding the space for operating the breakers and feeders. The width of each of the parallel channels is 180 mm. The cap was mounted at a height of 50mm above the anode.
The apparatus operates as follows. Between normal operation of the reduction cell operation, gas entering under the hood of the reduction cell 2 through the enclosure opening pierced by the breakers 6 mixes with air entering through hood leaks and is drawn into the cap 4 of the main horizontal gas duct 9 for degassing and further into the potroom degassing system (not shown). The divider plate 7 in the cap 4 distributes the airflow evenly over the cap base. By varying the height of the channels 8 and 8' to the main gas duct, distributing the resistance along the length of the main horizontal gas duct 9, it is possible to ensure a uniform gas flow distribution between the caps 4. The cap 4 is preferably positioned above the housing, between the breakers 6, at a height of 0.5 to 1.5 of the height of the anode 5, to ensure sparsity sufficient for complete removal of the gas.
When performing operations on the reduction cell involving partially opening the reduction cell, air is drawn under the hood 2 and mixed with the anode gas to form vertical and horizontal vortices. The guiding element 3 fixed to the inside of the cover breaks up the vortex and guides it to the cap 4. When an operation is performed, such as replacing the anode, gas is removed simultaneously through the main gas duct 9 and the additional gas duct 10. Thus, the sparsity under the hood can be increased by a factor of 3 to 4, which is sufficient to remove gas when the hood is partially opened. Known mechanisms, such as dampers, cut in and out the main gas duct and the additional gas duct.
The claimed apparatus is achieved with a 2 to 4 fold reduction in the amount of gas removed from one reduction cell due to the combined effects of reducing the amount of gas to be removed, redistributing the gas flow into the gas inlet zone and positioning the cap close to the location where the electrolysis gas is discharged below the hood. The degassing efficiency factor obtained is 98% to 99%, depending on the operation carried out by the reduction cell.
The cap is installed under the hood near the location where the electrolytic gas is discharged, the degassing efficiency is increased with a smaller amount of removed gas, and the height at which the cap is installed above the electrolyte housing ensures the possibility of anode replacement without damaging the cap. The internal plate of the cap ensures uniform air intake along the length of the base of the cap.
The cap is included in both the primary and supplemental degassing systems to ensure effective degassing between and during normal operations.
Said variation of the height of the channels connected to the caps ensures an efficient operation of all caps, i.e. an efficient degassing along the length of the reduction cell.
The main gas conduit and the additional gas conduit are connected to the cap at the top of the cap (at the concentrator apex). The speed of the flow at the outlet of the concentrator has reached equilibrium and cutting into the additional circuit will not change the characteristics of the gas flow inside the concentrator, i.e. will not affect the intake uniformity at the base of the cap. The gas redistribution in the circuit is proportional to the sparsity in the circuit and the cross-sectional area of the gas conduits.
The positioning of the caps between the breakers at a height equal to 0.5 to 1.5 of the height of the anodes allows the replacement of the anodes without damaging the structural elements of the device for removing gases and reduces the impact of the temperature and of the abrasive particles on the normal operation of the breakers and feeders of the reduction tank.
Claims (11)
1. An apparatus for collecting and removing gases in an aluminium reduction cell, the apparatus comprising:
a gas piping system comprising a horizontal main gas pipe and an additional gas pipe configured to cut in/out the main gas pipe and the additional gas pipe; and
a gas collection cap;
wherein each of the gas collection caps is connected to a horizontal main gas conduit by a first channel to form a main degassing circuit and to an additional vertical gas conduit by a second channel to form an additional degassing circuit; wherein the height of each subsequent first passage of the primary circuit increases along the gas flow by 16% to 24% of the height of the previous first passage, and the height of each subsequent second passage of the additional circuit increases along the gas flow by 24% to 26% of the height of the previous second passage;
wherein a separator plate is arranged at the bottom of the inner surface of the longitudinal side of at least one gas collecting cap along the direction of the gas flow, and the length of the separator plate is not more than 50% of the height of the gas collecting cap;
wherein at least two separator plates are symmetrically mounted on each side of a central axis of the gas collecting cap, the length of each subsequent plate being reduced by 25% to 35% in the direction of the central axis of the cap with respect to the preceding plate.
2. The device of claim 1, wherein the primary circuit and the additional circuit are combined at a top of the cap.
3. The device of claim 1, wherein the cap is made in the form of a concentrator.
4. The apparatus of claim 1, wherein the distance between the divider plates is at least 15% of the length of the base of the funnel.
5. A system for collecting and removing gases in an aluminum reduction cell, the system comprising:
a reduction cell comprising at least an anode and an electrolyte shell breaker,
a cover of the reduction tank, the cover being comprised of a removable cover;
a gas piping system comprising a horizontal main gas pipe and an additional gas pipe configured to cut in/out the main gas pipe and the additional gas pipe;
a gas collection cap positioned below the hood of the reduction cell between the electrolyte shell breakers along a longitudinal axis of the reduction cell to form a gas entry area in a center of the reduction cell;
wherein a guide element is mounted horizontally inside the removable cover with respect to the electrolyte housing, the guide element being configured to guide a gas flow into the air intake region;
wherein each of the gas collection caps is connected to a horizontal main gas conduit by a first channel to form a main degassing circuit and to an additional vertical gas conduit by a second channel to form an additional degassing circuit; wherein the height of each subsequent first passage of the primary circuit increases along the gas flow by 16% to 24% of the height of the previous first passage, and the height of each subsequent second passage of the additional circuit increases along the gas flow by 24% to 26% of the height of the previous second passage;
wherein a separator plate is arranged at the bottom of the inner surface of the longitudinal side of at least one gas collecting cap along the direction of the gas flow, and the length of the separator plate is not more than 50% of the height of the gas collecting cap;
wherein at least two separator plates are symmetrically mounted on each side of a central axis of the gas collecting cap, the length of each subsequent plate being reduced by 25% to 35% in the direction of the central axis of the cap with respect to the preceding plate.
6. The system of claim 5, wherein the cap is made in the form of a concentrator.
7. The system of claim 5, wherein the gas collection cap is positioned above the electrolyte housing at a distance equal to 0.5 to 1.5 of the height of a new anode.
8. The system of claim 5, wherein the height of the hood relative to the level of the electrolyte is equal to 1.5 to 2 of the height of a new anode.
9. The system of claim 5, wherein the primary circuit and the additional circuit are combined at a top of the cap.
10. The system of claim 5, wherein the distance between the divider plates is at least 15% of the length of the base of the funnel.
11. A reduction cell comprising the apparatus for collecting and removing gas of claim 1.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2017140384 | 2017-11-20 | ||
| RU2017140384A RU2668617C1 (en) | 2017-11-20 | 2017-11-20 | Device for collection and removal of gases in aluminium electrolysis cell |
| PCT/RU2018/050084 WO2019098888A1 (en) | 2017-11-20 | 2018-07-26 | Device for collecting and removing gases in an aluminum electrolysis cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111356788A true CN111356788A (en) | 2020-06-30 |
| CN111356788B CN111356788B (en) | 2022-07-05 |
Family
ID=63798231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880074515.2A Active CN111356788B (en) | 2017-11-20 | 2018-07-26 | Apparatus for collecting and removing gas in aluminum reduction cell |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN111356788B (en) |
| CA (1) | CA3082087C (en) |
| NO (1) | NO20200539A1 (en) |
| RU (1) | RU2668617C1 (en) |
| WO (1) | WO2019098888A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20190343A1 (en) * | 2019-03-14 | 2020-09-15 | Norsk Hydro As | Arrangement for collection of hot gas from an electrolysis process, and a method for such gas collection |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419611A (en) * | 2000-03-24 | 2003-05-21 | 皮奇尼铝公司 | Implantation of installations of an electrolysis plant for producing aluminium |
| CN1520501A (en) * | 2001-06-25 | 2004-08-11 | ����˹��ķ(��ʿ)����˾ | Process and device for transport of gas |
| CN101641462A (en) * | 2007-03-22 | 2010-02-03 | 阿尔斯托姆科技有限公司 | Flue gas cooling and cleaning system |
| 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 |
| CN201485516U (en) * | 2009-08-10 | 2010-05-26 | 山东滨州渤海活塞股份有限公司 | Double-channel alloy aluminum electrolysis flue gas purifying dust collector |
| CN201793776U (en) * | 2010-06-29 | 2011-04-13 | 沈阳铝镁设计研究院 | Gas collecting pipeline system with aluminum cell and double smoke pipes |
| CN102312253A (en) * | 2010-06-29 | 2012-01-11 | 沈阳铝镁设计研究院有限公司 | Double-flue pipe gas-collecting pipeline system of aluminum electrolytic tank and control method |
| CN102995064A (en) * | 2012-12-24 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Collecting device of smoke in electrolysis |
| RU2553137C1 (en) * | 2014-01-23 | 2015-06-10 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Device for gases collecting and removing from aluminium electrolyser |
| CN105154921A (en) * | 2015-09-30 | 2015-12-16 | 东北大学设计研究院（有限公司） | Ash removal device and method for flues of electrolytic cell |
| CN106149007A (en) * | 2015-04-22 | 2016-11-23 | 沈阳铝镁科技有限公司 | Aluminum electrolyzing cell used multistage stand alone type gas collection lower flue structure |
| RU2603524C1 (en) * | 2015-06-15 | 2016-11-27 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Device for collection and removal of gases from aluminium electrolysis cell |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174483A (en) * | 1981-04-17 | 1982-10-27 | Sumitomo Light Metal Ind Ltd | Method and device for continuous measurement of current efficiency of aluminum electrolyzing cell |
| SU1025756A1 (en) * | 1981-11-26 | 1983-06-30 | Всесоюзный Научно-Исследовательский И Проектный Институт Алюминиевой,Магниевой И Электродной Промышленности | Apparatus for catching gases released in producing aluminium by electrolysis |
| RU2468127C1 (en) * | 2011-05-10 | 2012-11-27 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Device for collection and evacuation of anode gases from under electrolytic cell shelter with annealed anodes |
-
2017
- 2017-11-20 RU RU2017140384A patent/RU2668617C1/en active
-
2018
- 2018-07-26 CA CA3082087A patent/CA3082087C/en active Active
- 2018-07-26 CN CN201880074515.2A patent/CN111356788B/en active Active
- 2018-07-26 WO PCT/RU2018/050084 patent/WO2019098888A1/en active Application Filing
-
2020
- 2020-05-08 NO NO20200539A patent/NO20200539A1/en unknown
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419611A (en) * | 2000-03-24 | 2003-05-21 | 皮奇尼铝公司 | Implantation of installations of an electrolysis plant for producing aluminium |
| CN1520501A (en) * | 2001-06-25 | 2004-08-11 | ����˹��ķ(��ʿ)����˾ | Process and device for transport of gas |
| CN101641462A (en) * | 2007-03-22 | 2010-02-03 | 阿尔斯托姆科技有限公司 | Flue gas cooling and cleaning system |
| 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 |
| CN201485516U (en) * | 2009-08-10 | 2010-05-26 | 山东滨州渤海活塞股份有限公司 | Double-channel alloy aluminum electrolysis flue gas purifying dust collector |
| CN201793776U (en) * | 2010-06-29 | 2011-04-13 | 沈阳铝镁设计研究院 | Gas collecting pipeline system with aluminum cell and double smoke pipes |
| CN102312253A (en) * | 2010-06-29 | 2012-01-11 | 沈阳铝镁设计研究院有限公司 | Double-flue pipe gas-collecting pipeline system of aluminum electrolytic tank and control method |
| CN102995064A (en) * | 2012-12-24 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Collecting device of smoke in electrolysis |
| RU2553137C1 (en) * | 2014-01-23 | 2015-06-10 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Device for gases collecting and removing from aluminium electrolyser |
| CN106149007A (en) * | 2015-04-22 | 2016-11-23 | 沈阳铝镁科技有限公司 | Aluminum electrolyzing cell used multistage stand alone type gas collection lower flue structure |
| RU2603524C1 (en) * | 2015-06-15 | 2016-11-27 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Device for collection and removal of gases from aluminium electrolysis cell |
| CN105154921A (en) * | 2015-09-30 | 2015-12-16 | 东北大学设计研究院（有限公司） | Ash removal device and method for flues of electrolytic cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CA3082087A1 (en) | 2019-05-23 |
| CN111356788B (en) | 2022-07-05 |
| NO20200539A1 (en) | 2020-05-08 |
| RU2668617C1 (en) | 2018-10-02 |
| WO2019098888A1 (en) | 2019-05-23 |
| CA3082087C (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2436872C2 (en) | Entrapping system and method of emissions from electrolysis unit | |
| AU2009292735B2 (en) | A device for collection of hot gas from an electrolysis process, and a method for gas collection with said device | |
| CN111356788B (en) | Apparatus for collecting and removing gas in aluminum reduction cell | |
| CN103370219A (en) | Exhaust device for fuel cell vehicle | |
| EP1252373B1 (en) | A method and device for operating an electrolytic cell | |
| CN214881745U (en) | Water circulation cooling device for steel production | |
| CN104955315B (en) | A kind of electronic control module radiator | |
| CN211182284U (en) | Battery box | |
| RU2553137C1 (en) | Device for gases collecting and removing from aluminium electrolyser | |
| CN210951803U (en) | Water-retaining plate structure for condensation part of air conditioning unit | |
| CN204793740U (en) | Low -voltage distribution cabinet casing with wind channel | |
| CN211151292U (en) | Dust removal switch board | |
| CN110613996B (en) | Self-adaptive water mist dust removal system for casting workshop | |
| CN103203264A (en) | Airflow transportation method for vertical roller mill airflow device of cement raw material slag | |
| NO20111050A1 (en) | Method and apparatus for enclosing cell gases in an electrolytic aluminum cell | |
| CN201594971U (en) | Radiating device for high-voltage frequency converters | |
| CN112827992A (en) | Side ventilation type fume chamber | |
| KR101502769B1 (en) | Barrier facility of continuous casting plant | |
| CN213147466U (en) | Air inlet flow guide device of cooling tower | |
| CN202973948U (en) | Novel long shrinkable port type blowing-type mechanical draft cooling tower | |
| CN218626451U (en) | Pressure regulator and single-hole carbonization chamber pressure regulator | |
| CN212921160U (en) | Equipment mounting platform and battery charging and replacing bin | |
| CN216972584U (en) | Gas recovery device of steel converter | |
| CN217240333U (en) | High-protection oil-immersed cascade SVG device | |
| CN217857123U (en) | Ventilation cooling system for ultraviolet curing furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |