EP2857556A1 - Appareil et procédé de suppression conditionnée de gaz - Google Patents

Appareil et procédé de suppression conditionnée de gaz Download PDF

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Publication number
EP2857556A1
EP2857556A1 EP13187144.4A EP13187144A EP2857556A1 EP 2857556 A1 EP2857556 A1 EP 2857556A1 EP 13187144 A EP13187144 A EP 13187144A EP 2857556 A1 EP2857556 A1 EP 2857556A1
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EP
European Patent Office
Prior art keywords
heat exchanger
duct
ductwork
elements
gas flow
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.)
Withdrawn
Application number
EP13187144.4A
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German (de)
English (en)
Inventor
Peter Verbraak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danieli Corus BV
Original Assignee
Danieli Corus BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Danieli Corus BV filed Critical Danieli Corus BV
Priority to EP13187144.4A priority Critical patent/EP2857556A1/fr
Priority to PCT/EP2014/071082 priority patent/WO2015049311A1/fr
Publication of EP2857556A1 publication Critical patent/EP2857556A1/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the present disclosure relates to an apparatus for the removal of gasses from electrolysis cells by suction comprising a branch duct for each electrolysis cell, a ductwork connecting the branch ducts to a gas treatment centre, a central suction fan providing a gas flow in the branch ducts and the ductwork and a heat exchanger.
  • a system as aforementioned is known from EP 2 407 228 and from El Hani Bouhisten et al, "An innovative compact heat exchanger solution for an aluminium off-gas cooling and heat recovery", Light Metals 2013:793-797 (The Minerals, Metals & Materials Society, 2013 ).
  • Such systems enable control over the temperature of the gas entering gas treatment centre.
  • such systems require a large number of complex heat exchangers, arranged at specific places.
  • the heat exchanger should further be arranged in an upwards gas flow to reduce collection of dust and scaling on the heat exchanger proper.
  • one or more of the heat exchanger elements are removably arranged in the at least one of the branch ducts and the ductwork, in particular being removable on-line, i.e. with the apparatus otherwise functional and possibly in operation, e.g. being accessible from outside the respective duct(s).
  • This facilitates control and/or maintenance of the apparatus, e.g. for cleaning and/or repair.
  • heat exchangers in a flue gas flow in particular heat exchangers around which turbulence tends to occur, suffer from scaling which may be very hard to remove. Further, several removal techniques such as blasting may easily damage the heat exchanger and thus require particular for prevention is required. Moreover, if cleaning is imperfect, residues may provide starting points for accelerated recreation of scaling deposits.
  • the position of the heat exchanger facilitates access and, in particular when arranged in the main duct, the heat exchanger affects substantially the entire gas flow equally, facilitating process control and gas flow properties control, such as providing predictable turbulence and/or content of dust and/or other contaminants entrained in the gas flow.
  • Arrangement of the heat exchanger in other parts of the ductwork facilitates localised control of the gas flow, benefitting overall process parameters.
  • At least part of the heat exchanger is removable from at least one of the branch ducts and the ductwork on a lateral side thereof, e.g. by being slid out of the respective duct.
  • the removable part may be removable per individual heat exchanger element and/or in one or more assemblies of plural heat exchanger elements.
  • the heat exchanger configuration with respect to the number and/or positions of heat exchanger plates may be adapted to varying process conditions.
  • one or more of the heat exchanger elements are attached to a removable duct wall part.
  • the elements may be supported by the wall part in the respective duct and preferably the duct is substantially closed off, e.g. sealed, by the duct wall part.
  • the heat exchanger element(s) and duct wall part may be removed or inserted as a whole and relative positions between the heat exchanger element(s) and the duct wall are well defined.
  • the one or more heat exchanger elements are suspended from the wall part into the respective portion of the duct, which facilitates arranging the heat exchanger element(s) into the duct by hanging it/them into the duct. Closing off the duct prevents leaking of air into the duct and/or leaking of gas out of it.
  • An embodiment may comprise an apparatus for removing the removable part of the heat exchanger from the respective duct portion of the branch ducts and/or the ductwork and possibly transporting the element outside and away from the respective duct portion to a further location, e.g. a - preferably movable- crane or other lifting or hoisting arrangement. This facilitates removal and transport of the respective heat exchanger part.
  • part of the heat exchanger may be removable downwards and the support may be formed to lift the heat exchanger part up into the duct.
  • a lateral side of the duct at a position of at least part of the heat exchanger may be provided with one or more doors or hatches granting access to the interior of the duct, e.g. for inspection, maintenance and/or repair of a heat exchanger part without having to remove the heat exchanger part.
  • Such doors or hatches may also serve for removal of scale fallen from the duct wall and/or hear exchanger.
  • the heat exchanger comprises a plate heat exchanger comprising one or more heat exchanger plates in at least one of the branch ducts and the ductwork.
  • the ductwork comprises a main duct connected to the gas treatment centre and the heat exchanger is arranged the main duct.
  • a heat exchanger plate comprises a generally plate-like body of a highly heat conductive material such as a metal extending into the duct and being coupled with a coolant header having one or more coolant channels for conducting heat away from or towards the heat exchanger plate with the coolant.
  • the plate-like body is generally flat, being significantly larger in two perpendicular directions (length, width) than in a third direction (thickness) perpendicular to the other two directions, defining a general plane.
  • a generally flat object is provided that, when arranged in a gas flow with a large size extending in the gas flow direction, can provide a large surface for (thermal) contact with the gas at a low drag.
  • the plate need not be plane in the strict Cartesian sense and it may be curved in one or more directions so as to provide a shell-like shape.
  • a plate heat exchanger provides a large heat exchanging contact surface in relation to the number of connections to other, differently shaped parts, in particular one or more coolant headers, in comparison with a tube heat exchanger or, in particular, a tube bundle wherein each tube needs a connection to a manifold. Further, the aerodynamic properties of the heat exchanger may be controlled better than with a tube heat exchanger; in particular, turbulence may be more predictable and/or reduced, so that settling of dust and/or scale may be reduced or prevented, while the location of such settling / scaling may be predicted more accurately and appropriate measures may be taken. Moreover, a plate heat exchanger may be cleaned more easily than a tube (bundle) heat exchanger.
  • one or more heat exchanger plates comprise a plate-like body and one or more coolant channel portions integral with it and in particular being arranged adjacent each other in and/or on the plate-like body in at least one of the branch ducts and the ductwork.
  • the coolant channels may have various shapes and in they may be arranged in the direction of the plane in a serpentine pattern.
  • Suitable construction types comprise one or more tubes fixed onto a plate, e.g. by soldering, welding, clamping etc., and/or a number of plate portions attached to each other and structured such that one or more enclosed coolant channels are provided between the attached plate portions, e.g. so-called "coil sheets".
  • Such structuring may be provided by a distribution of spot welds and/or rivets etc., but ribs, corrugations, and/or further structures may also be provided, possibly in combination. This enables a large thermal contact between the gas and the coolant in the duct and it may improve aerodynamic properties like reducing drag.
  • the heat exchanger plates are generally devoid of protrusions like ribs, fins etc. extending into the gas flow, which are customary in traditional heat exchangers, so as to reduce drag.
  • One or more plates may be formed aerodynamically, e.g. wing or foil-like.
  • the heat exchanger may comprise plural heat exchanger elements of different construction and/or one or more dummy elements, preferably arranged on an upstream side of the heat exchanger with respect to (the direction of) the gas flow. This facilitates accommodating different conditions in the gas flow.
  • heat exchangers had generally identical constructions throughout. However, it has been found that the gas flow conditions may vary significantly along the interaction zone of the gas flow and the heat exchanger, e.g. with respect to gas flow velocity, content of dust and/or other entrained matter and/or turbulence. Providing a heat exchanger with heat exchanger elements, e.g. plates, of different construction and/or one or more dummy elements, in particular dummy plates, can significantly improve robustness of the apparatus and the heat transfer process alike.
  • heat exchanger elements e.g. plates
  • a first element may have a plate shape and comprise a plurality of coolant channels and/or one or more coolant channels of significant lengths undulating in or on the heat exchanger plate body, whereas a second plate shaped element comprises significantly less cooling ducts or cooling duct length, e.g. a single U-shaped coolant channel and being otherwise massive but of equal shape as the first plate.
  • a dummy element may be an element of generally similar shape as one or more heat exchanger elements of the heat exchanger, but without (connection to) a coolant channel.
  • Such relatively robust heat exchanger elements and/or dummy elements may be used at positions in the heat exchanger that are subject to significantly abrasive gas flow portions and/or portions within the apparatus suffering from elevated scaling. Such positions will occur on an upstream side of the heat exchanger with respect to the gas flow direction.
  • one or more heat exchanger elements and/or dummy elements when applicable, may be formed for promotion of scaling and/or deposit of material entrained in the gas flow, such as solid matter and/or matter that solidifies at the normal operating temperature of the respective element. This may be done by providing cavities, ridges and/or turbulence-promoting portions in or on the heat exchanger elements, which may otherwise be formed turbulence-reducing or -preventing. Thus, deposition and scaling on target places is induced and promoted, preventing deposition and scaling in other, possibly more delicate, places. Providing sacrificial heat exchanger elements or dummy elements therefore protects delicate parts and improves overall behaviour and reliability of the apparatus. Moreover, by inducing deposition and/or scaling on the heat exchanger, fouling and wear of filters in the gas treatment centre and/or other downstream portions of the apparatus, with respect to the gas flow, are reduced or prevented.
  • At least one of the heat exchanger elements and/or dummy elements may comprise a dust- and/or scaling repellent coating. This assist preventing deposition of dust in unwanted locations.
  • the combination of scaling/deposition promoting portions and dust allows controlled localisation of scaling, dust collection and the like in the apparatus.
  • the apparatus may comprise a main suction duct connected to the gas treatment centre, wherein at least part of the heat exchanger is preferably arranged in the main suction duct. This allows affecting, in particular cooling, the gas from plural, if not all, electrolysis cells.
  • the heat exchanger is configured to establish a downstream gas temperature in a range of 90-150 degrees Celsius, in particular 100-130 degrees Celsius, more in particular 100-120 degrees Celsius.
  • Such temperatures spare the material of bag filters commonly used in gas cleaning sections of a gas cleaning centre for cleaning electrolysis gases such as produced in electrolysis of aluminium. It has been considered, moreover, that operating temperatures in the range of 100-120 degrees Celsius are optimal for fluoride adsorption at lower temperatures, effectiveness of filtering dust may be improved.
  • Electrolysis processes for manufacturing of aluminium tend to produce (fluoride-containing) gases at temperatures of about 80-100 degrees Celsius in colder climates, whereas in hot climates the gas temperatures of the same processes may be up to about 180-200 degrees Celsius.
  • the present apparatus is useful for thermal conditioning of the gas in either case, be it cooling or heating the gas.
  • the word "coolant” in this text should be understood to comprise any suitable fluid operating medium for transferring heat from or to the heat exchanger element(s), i.e. being either for cooling or rather for heating the heat exchanger element(s).
  • the heat exchanger is a first heat exchanger comprising an operating medium for absorbing and transporting heat from or to the first heat exchanger, the first heat exchanger being coupled with a second heat exchanger comprised in the apparatus for cooling or heating the operating medium, wherein preferably the second heat exchanger is arranged for exchanging heat with a cold reservoir most preferably the environment, in particular losing heat to the environment.
  • the second heat exchanger may comprise a series of open-air heat exchangers, possibly comprising forced air devices such as ventilators.
  • the coolant may be fed through the first and second heat exchangers via forced flowing, e.g. comprising a compressor in a closed circuit.
  • the second heat exchanger may comprise a second operating medium.
  • At least one of the first and second heat exchangers comprises a heat pipe arrangement, wherein the respective coolant is evaporated at one side and condenses at another side and a flow of the coolant is provided by gravity due to density differences between the evaporated coolant and the condensed coolant.
  • Suitable coolants comprise glycol, other hydrocarbons and/or water.
  • At least part of the heat exchanger is arranged as a counterflow heat exchanger. This improves heat exchange between the gas and the heat exchanger.
  • At least part of the heat exchanger is arranged for providing a predetermined temperature distribution with respect to the gas flow direction, wherein in particular part of the heat exchanger is arranged as a co-flowing heat exchanger and another part of the heat exchanger is arranged as a counterflow heat exchanger.
  • a cold zone and/or a hot zone in the gas flow may be provided.
  • a cold zone may promote solidification and/or deposition of matter entrained in the gas flow.
  • specific portions of the heat exchanger may be dedicated for dust collection, scaling, etc. so that other portions may be spared from such effects.
  • a first portion of the heat exchanger is arranged on an upstream side of the gas flow and serves for cooling the gas flow from an initial, relatively high, temperature to an intermediate, relatively low, temperature, preferably in a counterflow arrangement
  • a second portion of the heat exchanger is arranged downstream of the first heat exchanger portion with respect to the gas flow and serves for heating the gas from the intermediate temperature to an end temperature in between the initial and intermediate temperatures, preferably in a co-flowing arrangement, with a single coolant flow circuit and/or wherein the coolant exit temperature of the first heat exchanger corresponds to the coolant entry temperature of the second heat exchanger portion.
  • condensation of contaminants may be promoted energy efficiently since heat that has been drawn off the incoming gas to cool it to a condensation temperature for the targeted contaminant(s) is returned to the gas to heat the gas so as to provide a gas flow after the heat exchanger of a desired temperature but without the target contaminants.
  • the present apparatus is particularly suitable for electrolytic production of aluminium, especially for such production using a Hault-Heroult-process.
  • a heat exchanger for an apparatus as disclosed herein, comprising a plurality of plate heat exchanger plates and at least one dummy plate.
  • the heat exchanger plates are decouplable from each other, e.g. for inspection, maintenance, repair and/or exchange.
  • Fig. 1 shows an apparatus 1 for the removal of gasses from electrolysis cells 3 by suction comprising a branch duct 5 for each electrolysis cell connected to a ductwork 4, having a manifold 6, a main duct 7 connecting the branch ducts 5 via the manifold 6 and here via optional group ducts 8, to a gas treatment centre 9, a central suction fan 11 providing a gas flow in the ducts and a stack 13 for venting exhaust gases.
  • the electrolysis cells 3 are grouped.
  • the apparatus may comprise tens to hundreds of electrolysis cells 3 arranged in more or fewer groups of electrolysis cells 3 with the ducts 5-8 suitably arranged accordingly.
  • each main duct 7 a plate heat exchanger 15 is arranged, comprising heat exchanger plates extending into the gas flow, as explained below. It should be noted that the heat exchanger may be arranged in other locations as well, in particular in one or more group ducts 8. It is noted that due to the suction, the gas pressure inside the ducts will be lower than the atmospheric pressure outside of the ducts.
  • the electrolysis cells 3, or “pots”, are operated for electrolytic production of aluminium from alumina (aluminium oxide) according to a Hault-Heroult process.
  • alumina aluminium oxide
  • Such process produces hot gases containing fluorides that are sucked from the cells 3 to the gas treatment centre 9 under the influence of the central suction fan 11.
  • Additional suction ductwork such as for boosted suction when opening an electrolysis cell 3 may be provided.
  • Such additional suction ductwork may also comprise a heat exchanger as presently described.
  • Figs. 2A-2C show as a detail of an apparatus according to Fig. 1 an embodiment of the heat exchanger 15 in the duct 7.
  • the heat exchanger 15 is a plate heat exchanger comprising heat exchanger plates 17 in a lumen 19 of the duct 7, which here has a generally rectangular shape.
  • the plates 17 are generally flat and plane extending in two perpendicular directions significantly more than in the third direction perpendicular to both former directions.
  • the plates have a generally rectangular shape but other shapes are conceivable.
  • the heat exchanger plates 17 each comprise one or more coolant channels, being interconnected in series (open arrows) in the gas flow direction (black arrows). Adjacent heat exchanger plates 17 in a direction perpendicular to the gas flow may be interconnected as well, in particular in parallel with respect to the coolant channels. However, individual connection to a coolant circuit of one or more (sets of) heat exchanger plates 17 is also possible.
  • the coolant flows from right to left ( Fig. 2A ), whereas the gas flows oppositely from left to right.
  • hot gas flows into the portion of the duct 7 comprising the heat exchanger 15, and the coolant has a lower temperature than the gas, cooled gas will exit (the duct portion comprising) the heat exchanger 15 and a counterflow heat exchanging arrangement is provided. If the operating medium (“coolant”) flows in the same direction as the gas flow, a co-flowing heat exchanger arrangement is provided.
  • Fig. 3 is a view similar to that of Fig. 2A part of an embodiment of an apparatus according to Fig. 1 with a heat exchanger 15 and further comprising a crane 21 comprising a hoisting device 23 movable along a monorail 25 or another conveyor for removing the plates 17 from the duct 7 and, in this case, transporting them away.
  • the plates 17 are removable from the duct 7 on a lateral side of the duct 7 and in lateral direction, here, generally in vertical direction.
  • the plates 17 comprise an optional flange 27 and the duct 7 has a wall 29 with slots (not shown) accommodating the plates 17, so that the plates 17 can be inserted into and removed from the duct 7 by the crane 21 through the according slots.
  • the flanges 27 of When inserted into the duct 7, (the flanges 27 of) the plates 17 rest on the duct wall 29.
  • the flanges 27 preferably close off the respective slots, thus effectively forming part of the duct wall.
  • Fastening arrangements e.g. bolts, clamps etc. may be provided. Doors, hatches, valves etc. may be provided to close off one or more slots from which heat exchanger plates 17 have been removed at least partly, preferably fully.
  • the geometry and/or size of the heat exchanger can be adapted to suit particular operation conditions of the apparatus, e.g. the number of electrolysis cells in use, a process temperature and/or an outside temperature, composition of the gas etc.
  • open slots in the duct wall 29 from which heat exchanger plates 17 have been removed may not significantly affect the gas flow in the duct work (5-8) and not lead to leaking of gas from the duct 7 so that doors and the like for closing off slots need not be provided.
  • assemblies of interconnected heat exchanger plates 17 may be made removable as a whole, e.g. as an integrated cassette.
  • the heat exchanger may be of different construction and not comprise heat exchanger plates, but of which one or more heat exchanger elements can still be removed from the respective duct, preferably on and towards a lateral side of the respective duct.
  • one or more heat exchanger tubes or entire cassettes of tube bundles may be removed from the duct for adaptation of the heat exchanger and/or for inspection, maintenance, repair etc.
  • Figs. 4 is a side view of an embodiment of a heat exchanger plate 17 in mid-cross section.
  • the plate 17 has a single coolant channel 31 in a serpentine pattern between connection ports 33 for flowing a fluid operating medium (coolant) through (the coolant channel 31 of) the plate 17.
  • Fig. 5 is a front view (cf. Fig. 2C ) of an assembly 35 of plural heat exchanger plates 17 that are fixed together, forming an integrated cassette, and of which the respective coolant channels 31 are interconnected through a manifold 37.
  • plural heat exchanger plates 17 may be removed from and inserted into the duct 7 in one operation.
  • the number of slots in the duct wall 29 may be reduced compared to arrangements with (manipulation of) single heat exchanger plate 17.
  • Fig. 6 shows, as in Fig. 2B , another embodiment of a heat exchanger 15 in a duct 7 of an apparatus of the type of Fig. 1 .
  • this heat exchanger 15 comprises dummy plates 39 in addition to heat exchanger plates 17.
  • the dummy plates 39 are arranged on an upstream side of the heat exchanger 15 with respect to the gas flow (white arrows), where the gas flow will contain most entrained dust and other contaminants.
  • the dummy plates 39 protect the heat exchanger plates 17 arranged downstream of them from wear. In some embodiments, it may appear that heat exchanger plates 17 further downstream may suffer from wear and/or deposition of contaminants more than plates further upstream.
  • one or more of the affected plates 17 may be formed more robust than adjacent plats 17 and/or be exchanged for dummy plates 39.
  • Embodiments with removable heat exchanger plates as presented herein facilitate optimisation of the geometry of the heat exchanger, also on line in case process parameters change in one or more electrolysis cells 3 or elsewhere in the apparatus 1.
  • Fig. 7 is a scheme of part of an embodiment of an apparatus as disclosed herein otherwise.
  • Fig. 7 shows an arrangement wherein the plate heat exchanger 15, arranged for thermal conditioning of gas with a first temperature G(T1) to gas with a second, different, temperature G(T2) using exchange of heat with an operating medium (coolant) flowing in a closed loop 41.
  • the medium is reconditioned to a default temperature in a second heat exchanger 43, e.g. for exchange to environmental temperature.
  • an optional storage tank 45 for storing and possibly replenishing and/or refreshing an amount of the medium via suitable system 47 (not shown) and an optional pump 49 for propelling the medium are provided as well. At least the pump 49 may be arranged in another position in the arrangement.
  • Fig. 8 shows a simplified apparatus 1, wherein coolant from the first heat exchanger 15 is evaporated in the first heat exchanger 15, the resulting vapour rises through a conduit 51 to the second heat exchanger 43 in which the coolant is condensed to a liquid phase.
  • the resultant liquid flows back through the conduit 51 by gravity to the first heat exchanger 15 to start the cycle anew.
  • Such heat pipe operation principle obviates compressors and/or other active flow-generating devices and it may reduce numbers of conduits for establishing a coolant flow (pipes, hoses, etc.).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP13187144.4A 2013-10-02 2013-10-02 Appareil et procédé de suppression conditionnée de gaz Withdrawn EP2857556A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13187144.4A EP2857556A1 (fr) 2013-10-02 2013-10-02 Appareil et procédé de suppression conditionnée de gaz
PCT/EP2014/071082 WO2015049311A1 (fr) 2013-10-02 2014-10-01 Appareil et procédé pour l'élimination conditionnée de gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13187144.4A EP2857556A1 (fr) 2013-10-02 2013-10-02 Appareil et procédé de suppression conditionnée de gaz

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EP2857556A1 true EP2857556A1 (fr) 2015-04-08

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EP13187144.4A Withdrawn EP2857556A1 (fr) 2013-10-02 2013-10-02 Appareil et procédé de suppression conditionnée de gaz

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EP (1) EP2857556A1 (fr)
WO (1) WO2015049311A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106894050A (zh) * 2015-12-18 2017-06-27 沈阳铝镁设计研究院有限公司 保温通风型电解厂房结构

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222841A (en) * 1979-04-23 1980-09-16 Alumax Inc. Hall cell
GB2268189A (en) * 1992-06-17 1994-01-05 Mitsubishi Electric Corp Reducing electrolytic corrosion in plate-type heat exchanger and production by brazing
US5855757A (en) * 1997-01-21 1999-01-05 Sivilotti; Olivo Method and apparatus for electrolysing light metals
US6893619B1 (en) * 2000-09-13 2005-05-17 Ford Global Technologies, Llc Plate-frame heat exchange reactor with serial cross-flow geometry
CN101435089A (zh) * 2008-12-03 2009-05-20 北京佰能电气技术有限公司 一种电解槽低温烟气余热利用的系统和方法
EP2407228A1 (fr) 2010-07-14 2012-01-18 Alstom Technology Ltd Unité de nettoyage des gaz et procédé de nettoyage des gaz
CN202849556U (zh) * 2012-08-31 2013-04-03 林州市林丰铝电有限责任公司 电解烟气余热回收换热器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222841A (en) * 1979-04-23 1980-09-16 Alumax Inc. Hall cell
GB2268189A (en) * 1992-06-17 1994-01-05 Mitsubishi Electric Corp Reducing electrolytic corrosion in plate-type heat exchanger and production by brazing
US5855757A (en) * 1997-01-21 1999-01-05 Sivilotti; Olivo Method and apparatus for electrolysing light metals
US6893619B1 (en) * 2000-09-13 2005-05-17 Ford Global Technologies, Llc Plate-frame heat exchange reactor with serial cross-flow geometry
CN101435089A (zh) * 2008-12-03 2009-05-20 北京佰能电气技术有限公司 一种电解槽低温烟气余热利用的系统和方法
EP2407228A1 (fr) 2010-07-14 2012-01-18 Alstom Technology Ltd Unité de nettoyage des gaz et procédé de nettoyage des gaz
CN202849556U (zh) * 2012-08-31 2013-04-03 林州市林丰铝电有限责任公司 电解烟气余热回收换热器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EL HANI BOUHABILA ET AL.: "An innovative compact heat exchanger solution for an aluminium off-gas cooling and heat recovery", LIGHT METALS, 2013, pages 793 - 797

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106894050A (zh) * 2015-12-18 2017-06-27 沈阳铝镁设计研究院有限公司 保温通风型电解厂房结构

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