CN101044267B - Method and system for energy recovery and/or cooling - Google Patents
Method and system for energy recovery and/or cooling Download PDFInfo
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- CN101044267B CN101044267B CN2005800354819A CN200580035481A CN101044267B CN 101044267 B CN101044267 B CN 101044267B CN 2005800354819 A CN2005800354819 A CN 2005800354819A CN 200580035481 A CN200580035481 A CN 200580035481A CN 101044267 B CN101044267 B CN 101044267B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001816 cooling Methods 0.000 title abstract description 25
- 238000011084 recovery Methods 0.000 title abstract description 13
- 239000004411 aluminium Substances 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005868 electrolysis reaction Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 16
- 210000004027 cell Anatomy 0.000 description 14
- 239000002918 waste heat Substances 0.000 description 9
- 239000001307 helium Substances 0.000 description 7
- 229910052734 helium Inorganic materials 0.000 description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000008151 electrolyte solution Substances 0.000 description 5
- 230000003245 working effect Effects 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000012369 In process control Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005297 material degradation process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000005068 transpiration Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
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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)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The present invention relates to a method and a system of energy recovery and/or cooling in at least one electrolysis cells (1) for the production of a metal, in particular aluminium, where the cell(s) is provided with one or more heat exchangers and where a heat exchange medium circulates through said heat exchanger(s) and is further directed to at least one heat conversion unit, such as an open circuit expander turbine (3). The expander turbine is connected with a compressor (2) that supplies the heat exchange medium to the cells (1, 51). In one embodiment, a second expander turbine (40) is connected to a generator (41) that can be applied for production of electricity. The system is substantially self propelled and the heat exchange medium is preferably air applied in an open circuit.
Description
Technical field
The present invention relates to a kind of energy recovery and/or refrigerative method and system that is used to produce the employed electrolyzer of metal, wherein waste heat extracts to cool off said electrolyzer and/or to use waste heat in an advantageous manner from electrolyzer.
Especially, the present invention includes and be used for, and the heat energy that reclaims is converted into such as pressure and also possibly is the energy of other forms such as electric energy at the method and system of Aluminium industry from the electrolyzer recovery waste heat.Say that further the heat exchange medium of rising pressure can be used to produce electric energy and said electric energy is supplied to electrolyzer with the turnout that increases said electrolyzer and/or reduce the power consumption from General Electric Network.The medium that pressurizes for cooling purpose can be imported into electrolyzer.
Background technology
In the production process of aluminium,, the energy consumption that every production one kg aluminium of electrolytic process produces adds the carbon (0.334kg C=3.15kWh theoretically) that consumes about 0.4kg because being approximately the electric energy of 13kWh.The theoretical enthalpy that producing every kg aluminium needs is about 6.4kWh.Therefore, the electric current that flows through electrolytic solution produces too much heat mainly due to the ohmic resistance of electrolytic solution, the loss of energy therefore in electrolyzer, occurs.
At the electrolyzer that is used for producing aluminium, be necessary to make solid-state electrolytic solution solidify flange (ledge) along the sidewall of groove thorax to prevent cell lining material degradation and corrosion.If temperature raises in the electrolyzer, flange should be melted, thereby will receive great influence the work-ing life of electrolyzer.
On the other hand; If electrolyzer temperature is too low; Especially the temperature along bottom of electrolytic tank is too low; Electrolytic solution that negative electrode will progressively be solidified or residue cover, and said electrolytic solution that solidifies and residue have reduced to be used for the active region of distribution of current, and therefore because disadvantageous MHD effect raises resistance and energy efficiency reduces.
Typically, thermal equilibrium and thus the thickness of each electrolyzer flange regulate through the cell resistance of distance between anode and the negative electrode by changing, and be identical for all the electrolytic cell currents intensity in the series connection electrolyzer in a row.In electrolyzer, introduce hot extraction system for be supplied to the electrolyzer energy and each electrolyzer cooled off between keep having any problem aspect the equilibrated.On the other hand, allow operation of cells more neatly like this, comprise and use higher strength of current and the variation of the strength of current that influence cooling conditions or parameter (like external temperature) made preferably react.
When the electrolyzer that is used to produce aluminium is carried out proper handling, between the strength of current of the electric energy that provides and the output of the aluminium of producing certain proportionlity is arranged substantially.When if electrolyzer is operated under alap voltage, increase that strength of current need keep or even the resistance that increases electrolyzer to keep magnetofluidodynamic stability.Therefore, do not revise if electrolyzer is not carried out other, the energy that is supplied to electrolyzer increases to the quadratic power near output.As a kind of simple thinking, as long as output is increased through waste heat is removed the temperature of controlling electrolyzer from electrolyzer.For example can collect waste heat through allowing heat-eliminating medium in the loop line, to circulate, melt metal is carried out heat exchange in said loop line and electrolyzer and the heat exchanger.This heat exchanger can be arranged in the sidewall of electrolyzer or in the bottom of electrolyzer.
Prior art has proposed the way of several solutions to reclaim or to be utilized in the too much heat that produces in the system aluminium cell.
Usually, part less relatively in the current heat is recovered, and for example is used for preheating feed and anode with approaching common processing temperature 950-965 ℃ of scope.
WO 87/00211 discloses a kind of electrolytic cell assembly that is used for the electrometallurgy purpose, and wherein cooling room has a fraction of base regions that covers cell surface.Between these cooling rooms, have no tangible space, these cooling rooms cover the part of the suitable vast scale of cell surface together.Said cooling room is suitable for receiving the through-flow of heat-eliminating medium, and said heat-eliminating medium is controlled to be used for each cooling room one by one.Said heat-eliminating medium is preferably helium, and the heat that extracts can be converted into electric energy through the turbo that drives generator.
Purport of the present invention is that heat-eliminating medium circulates in a loop line of each single production electrolyzer, therefore identical medium both be used for heat energy transmission also as the working medium of mover, so that heat energy is converted into electric energy.Said loop line under high pressure uses helium as working medium.This will increase proportion and reduce speed and reduced gas friction for given rate of cooling.Helium and air ratio have higher unit mass thermal capacity and lower viscosity and higher heat conductivity.Therefore, can increase for the rate of heat transfer of designated area and the temperature difference and because the transmission of the heat-eliminating medium of necessary amounts through throat reduced frictionloss.Thereby, can reduce all cooled regions and the extremely minimum size of active region in the heat exchanger, stay the Free Region of largest portion for the main purpose of producing aluminium.
Relevant WO 87/00211 sixty-four dollar question is to comprise all relevant members; As the loop line of devices such as heat exchanger, recuperator, compressor, turbo must be have bubble-tight preventing that working gas from revealing to atmosphere, thereby cause significant cost.The working gas of some types is than expensive.If use helium and said loop are not absolute seal; The leakage that adds up through invisible aperture almost is along with the time means the loss of expense, and the loss of said expense has surpassed because the producing again and because the income that obtains of the improvement of cool electrolysis cells in process control effectively of electric energy.
WO 01/94667 discloses a kind of method that is used to produce the electrolyzer of aluminium and is used on sidewall, keeping the wall shell and is used to reclaim electric energy.At least the partial sidewall of electrolyzer comprises one or more transpiration cooling panels, and said panel forms the element of first circulation loop.Three single loop lines be used to dump low-temperature energy to atmospheric unit and be designated as total solution.
For each electrolyzer, need:
A) a plurality of elementary heat traps (showing the unit of 14 parallel connections in the drawings), the liquid metal that uses boiling temperature are used for collecting heat energy from said electrolyzer as medium.
B) rare gas element is preferably used in loop line, and said loop line is used for from the condensation of the liquid metal of the evaporation of the different units in first loop, collecting heat energy.
For second loop line, need the independent pump said gas that is used to circulate.
The intention of being explained with " 45% or higher efficient heat energy is converted into electric energy " according to WO 01/94667; The service temperature of obvious said pump must be higher; Roughly about 800-900 ℃, and heat exchanger and recuperator must be very effective, and rare gas element can be helium or hydrogen.
The reliable pump that can under these conditions, operate can face many technical matters, no matter and install or operation all can face the problem that cost increases basically.
C) the 3rd loop line, (using second loop line of rare gas element) is used for collecting heat energy from several electrolyzers.
For the 3rd loop line, compressor and expansion turbine machine are in turning axle and the transition function combination of the mechanical energy of driving generator with pump function with thermal power transfer.In said the 3rd loop line, also comprise and be used to dump low-temperature energy to atmospheric recuperator and water cooler.
According to the present invention, can overcome one or more shortcomings, complicacy and the deficiency of prior art as in appended claims, describing in detail.
Summary of the invention
The present invention relates to from electrolysis production groove recovered energy.Especially, the present invention is suitable for the cooling of electrolyzer and the process of heat recuperation and production aluminium.
Main purpose of the present invention and WO 87/00211 are similar with WO01/94667, and the present invention is based on control converts mechanical energy into from electrolyzer removal waste heat and with the major part of said heat energy needs.
Mechanical energy can relatively easily be converted into the potential energy of electric energy, pressurized air and/or other form used in the commercial run.
Similar with WO 87/00211, have only with a kind of working medium not only to be used for that the refrigerating industry process is used but also as using at the working medium that is used for the heat energy of collecting is converted into the mover of mechanical energy.
Yet difference with the prior art of the present invention is:
The present invention is based on and use the certainly driving cooling system of air, and use another kind of working medium (being preferably rare gas element) in the prior art as working medium.
Air is unique heat-eliminating medium that in open system, can carry out reasonable operation.For other heat-eliminating medium that is different from air, said system must operate in closed-circuit system to prevent that working medium is to atmospheric a large amount of losses.
If leakage change suddenly greatly or along with the time becomes greatly, working medium will have problems to atmospheric loss in the operating process of closed-circuit system.Because cooling system should be continuously and not operated intrusively by the electrolytic cell operation life-span, any leakage all can accumulate the loss of (like helium or other) of a large amount of (costliness) cooling/working mediums easily, has increased the cost of system operation thus.
Some leakages can be repaired and can not produced too many problem, in case but electrolyzer in operating process, come down to repair with revealing with the relevant most of cracks that interconnect of cooling room and they.
Because the heat-eliminating medium in the open system should end in the ambient atmosphere all the time, open system and closed-circuit system more more are not easy to reveal.The most of cracks that in work-ing life, occur will be negligible to the influence that the electrolyzer refrigerating function causes with leaking, and can reduce the output of the energy (electric energy, pressurized air or the like) that is reclaimed in the time of still many certainly.
Up to the present, air is avoided as the heat-eliminating medium in the throat, as long as said passage is made of metal and is combined in the cooling plate of the side that is used for electrolyzer.Temperature on the internal surface of cooling channel can surpass once in a while metallic alloy can with the temperature of airborne oxygen reaction.
If the diameter of optimization passage and length are to be suitable for using air but not rare gas element, air will be collected the waste heat energy of necessary amount, the situation of similar use rare gas element.With the situation contrast of using helium, the use of air will cause only edge increase aspect channel diameter, passage length and frictionloss.
But, if air uses the most important advantage that is obtained to be, be preferably used for the member of recirculated air through the cooling channel Already in the turbocharger in open loop, typically be used for reclaiming wasted energy from the waste gas of diesel motor.The good reliability of turbocharger and having long work-ing life.Because turbocharger uses as industrial components for a long time, the cost of unit cell is relatively low.
The compressor part of turbocharger is compressed to the density bigger than atmosphere with air from envrionment temperature and pressure, shows that air will reduce through the speed reduction and the frictionloss in passage of cooling channel.Air is through after the cooling channel, and temperature raises.Friction causes the loss of pressure and after the expansion turbine machine of air admission turbocharger, additional lip temperature raises.Cool electrolysis cells under the said condition, turbo is more than the needed mechanical energy of operate compressor with the mechanical energy that produces.
Therefore, the waste heat of recovery can be converted into pressure energy and be converted into electric energy in one embodiment.This conversion can be carried out in Thermal Motor, turbo etc.Said turbo can be used to Driven Compressor, generator etc.
Selectively, heat energy can be used to produce steam to drive steam turbine plant.In one embodiment of the invention, the energy of recovery is back to the same electrolyzer of harvest energy.In another embodiment, the Conversion of energy system service is in a plurality of electrolyzers or public electric wire net.Heat exchange loop is preferably open.
Description of drawings
Further explain the present invention through accompanying drawing and instance, in the accompanying drawings:
Fig. 1 discloses first embodiment, and wherein the aluminium cell of energy from the Conversion of energy unit reclaims,
Fig. 2 discloses second embodiment that is used for from an electrolyzer recovered energy,
Fig. 3 discloses the 3rd embodiment of the energy recovery that is used to comprise a burner,
Fig. 4 discloses the 4th embodiment that is used to comprise two unitary energy recoverys of Conversion of energy,
Fig. 5 discloses and has been used to use a Conversion of energy unit from the 5th embodiment more than an electrolyzer recovered energy,
Fig. 6 discloses the 6th embodiment from a plurality of electrolyzer recovered energies that is used to use common electric energy generator,
Fig. 7 discloses the 7th embodiment that is used for from a plurality of electrolyzer recovered energies, and at least a portion of a cold junction in wherein said loop is a common.
Embodiment
As shown in Figure 1, system aluminium cell 1 is provided with the pipeline 6,8 that is used for circulatory mediator.Pipeline 6 is arranged on the cold junction in loop, and pipeline 8 is arranged on the hot junction.Said medium can be a gas, is preferably air, also can use other gas with suitable character.In electrolyzer, be provided with the heat exchanger (not shown).
The medium of the heating of coming out from electrolyzer is transferred into expansion turbine machine 3, and said expansion turbine machine 3 for example mechanically is connected with compressor 2 through axle 4.The outlet of compressor 2 preferably is connected to pipeline 6 via a vacuum breaker 7, with medium circulation to the heat exchanger that is arranged in the electrolyzer 1.Said compressor has the inlet 5 that outside air is got into, and preferably after through strainer and the adjusting of mist eliminator (not shown), gets into.Before vapor pipe 9 of air admission, throttling valve 10 can be set at the outlet side of turbo.
Fig. 2 based on identical principle as shown in Figure 1, a branch road with valve 20 between pipeline just is set in addition, said valve 20 is with lead electrolyzer 1 or derive from electrolyzer 1 of medium.The effect that comprises the branch road of valve 20 be make medium through bypass from cold junction directly to the hot junction, and do not pass the heat exchanger in the electrolyzer, said valve can the controlled chilling medium flowing through electrolyzer 1, and controlled chilling effect by this way.
Fig. 3 based on principle as shown in Figure 2, pipeline comprises burner 30 at place, the hot junction of electrolyzer 1 in addition.Said burner is supplied to the gas that contains oxygen via the above branch road of mentioning, like air.The effect of burner is the energy level (temperature) of rising from the gas of electrolyzer recovery, more reliably reaches effective operation to guarantee the expansion turbine machine.Said burner can keep the temperature in of expansion turbine machine on constant level, and irrelevant with the electrolyzer outlet temperature.In addition, burner can be used under the electricity price condition with higher of electrical network or the insufficient situation of electric energy.
Fig. 4 discloses the 4th embodiment based on principle as shown in Figure 3.In Fig. 4, the hot junction in loop of leaving electrolyzer 1 also has the extra turbo 40 that is connected with the generator 41 that is arranged on said vapor pipe downstream except having burner 30 and having the turbo 3 of vapor pipe 9.Said embodiment can make the electric energy of recovery be back to electrolyzer to support electrolytic process.
In Fig. 5, show embodiment based on the principle of embodiment as shown in Figure 3.Except the element of embodiment as shown in Figure 3, one or more extra electrolyzers 51 are connected in parallel to fundamental circuit through pipeline 52 (cold junction) and the pipeline 53 (hot junction) that is communicated with pipeline 6 and pipeline 8 respectively.At cold junction, said electrolyzer 1, the junction between 51 are provided with T-valve 50 to be controlled at the amount of the circulatory mediator in the adjacent channel.The advantage that a plurality of electrolyzers are connected to same energy recovery unit is that a plurality of electrolyzers will be to helping to make the actual performance of single electrolyzer impartial, and reclaims the unit and will have more stable operational condition.Say that further using a more large-scale compressor/turbine unit is that a plurality of electric tank workings can reduce cost of investment.But a shortcoming is that said electrolyzer needs more complicated pipeline system.In the cold junction of electrolyzer rather than hot junction valve is set and will reduce investment significantly.
Fig. 6 is based on the principle that combines the embodiment as shown in Figure 5 of a plurality of electrolyzers 1,51 through pipeline 52,53, and wherein hot junction pipeline 8 comprises burner, has the expansion turbine machine of vapor pipe 9.Said vapor pipe also is connected with the second expansion turbine machine 40 that drives a generator 41.Said embodiment can make the electric energy of recovery be back to electrolyzer to support electrolytic process.
Fig. 7 openly has the device of two electrolyzers 1,51, and said two electrolyzers 1,51 are interconnection at their cold junction.Said two electrolyzers 1,51 have a compressor 2,72 and expansion turbine machine 3,73 devices, and wherein said expansion turbine machine is via axle 4,74 Driven Compressor.Said electrolyzer further has the cold junction pipeline 6,76 that connects compressor 2,72 and electrolyzer 1,51 and is connected the hot junction of electrolyzer 1,51 and the hot junction pipeline 8,78 of turbo 3,73.
In the pipeline 6,76 at loop cold junction place, be provided with T- valve 81,82, said T-valve allows remaining media cold, pressurization to distribute.The said cold medium that distributes is collected in a pipeline 80, and by the pressure converting unit 70 that further leads and be connected with generator 71.Excessive pressurized air more than in two electrolyzers can be connected to pipeline 80.Said pressure converting unit can be the expansion engine such as producer gas engine, air turbine etc.The advantage of this embodiment is that the air that temperature is lower transmits, rather than has higher temperature like the air in the discharge shown in the preceding instance in pipeline 80.
The air that temperature is lower is compared with the higher air of temperature, and the volume of per unit mass is less.For given stream pipe geometrical shape and given mass rate, reduced ducted gas velocity like this.Compare with transmitting the higher air of temperature, reduced frictionloss.Because temperature is lower, need less and more cheap thermal insulation material just can keep thermosteresis lower.
Can confirm size, be used for pressurized air and typically be the overvoltage of 3-5 crust to reach like the described Thermal Motor of above embodiment (turbocharger or compressor/expansion turbine machine).Thus, temperature is increased to from envrionment temperature and typically is 200-300 ℃.Because said temperature is higher than envrionment temperature, when heat-eliminating medium got into the cooling channel, the material pressure that causes owing to temperature shock reduced.Air compressed is distributed between a plurality of heat exchangers that comprise the cooling channel, and said heat exchanger preferably is the type among the patented claim NO 20031220 that is included in the applicant.Said air compressed is extracted waste heat from electrolyzer, and therefore makes the sidewall cooling.
The collected energy of common only part is to overcome the pressure-losses in the cooling channel.In some passages, have some cracks and little leakage, it will cause the pressure-losses.When air was heated, the volume of air increased.Therefore, the mechanical energy that in the swelling part of Thermal Motor, produces is more than the mechanical energy that Driven Compressor needs.This means that the part overvoltage that only need before swelling part, exist is with Driven Compressor.
We have following selection at this:
A) generator can be connected to Thermal Motor.Decompressor will produce electric energy at present.
B) can be connected with compressor, produce pressurized air.
C) hydro-pump can produce the hydraulic pressure ability.
D) second decompressor is connected with first decompressor, and between two separate units, distributes total pressure potential thus.
Further say, be to be understood that the turbocharger unit is preferably the type that can buy on the market, similar with use in the turbocharger unit of heavy motor truck with turbocharging internal-combustion engines or motor peculiar to vessel.Therefore, through using commercial modules can make cost maintain feasible level.
The motor generator (not shown) can directly be driven or driven the effect of auxiliary pumping/compression when needing with box lunch via the transmission of the axle through turbocharger.When entry condition or when a large amount of heat, must, electrolyzer just have this needs when removing.Further say, when possibility, can utilize generator to extract excessive energy.Therefore, motor generator can pass through controls such as computingmachine, and is used for control agent flowing through electrolyzer thus.
Claims (14)
1. one kind is used for producing electrolyzer (1, the 51) recovered energy and/or the refrigerative method of aluminium at least one; Wherein said electrolyzer is provided with one or more heat exchangers; And its air is through said heat exchanger circulation and further be directed to expansion turbine machine (3); Said expansion turbine machine (3) mechanically is connected with compressor (2) through an axle (4)
It is characterized in that,
Said compressor (2) is supplied to said electrolyzer (1,51) with the air of rising pressure; Thereby carry out heat exchange and cool off said electrolyzer from the mode and the said electrolyzer that drive with basic; Motor generator mechanically is connected with said compressor (2) with said expansion turbine machine (3), and motor generator further is arranged to control air flowing through electrolyzer.
2. the method for claim 1,
It is characterized in that,
Said air is conducted through burner (30) before getting into said expansion turbine machine (3), the temperature of the said air that is used to raise.
3. the method for claim 1,
It is characterized in that,
Remaining cold air is conducted through valve (81,82) to the air of said rising pressure outside the said electrolyzer (1,51) being supplied to, and gets into the converting unit (70) that heat/pressure is converted into electric energy again.
4. one kind is used for producing electrolyzer (1, the 51) recovered energy and/or the refrigerative system of aluminium at least one; Wherein said electrolyzer has one or more heat exchangers; And its air is through said heat exchanger circulation and further be directed to expansion turbine machine (3); Said expansion turbine machine (3) mechanically is connected with compressor (2) through an axle (4)
It is characterized in that,
The air of said compressor (2) supply rising pressure; Be used for carrying out heat exchange with said electrolyzer (1,51); Motor generator mechanically is connected with said compressor (2) with said expansion turbine machine (3), and motor generator further is arranged to control air flowing through electrolyzer.
5. system as claimed in claim 4,
It is characterized in that,
Said air circulates in a loop (5,6,8,9), and said loop is open to environment.
6. system as claimed in claim 4,
It is characterized in that,
One burner (30) is arranged between said electrolyzer (1,51) and the said expansion turbine machine (3).
7. system as claimed in claim 4,
It is characterized in that,
One second expansion turbine machine (40) is arranged on the downstream of said expansion turbine machine (3).
8. system as claimed in claim 7,
It is characterized in that,
The said second expansion turbine machine (40) is connected with a generator (41), is used to produce electric energy.
9. system as claimed in claim 8,
It is characterized in that,
The electric energy of said generation is returned to said electrolyzer or utility network.
10. system as claimed in claim 4,
It is characterized in that,
Cold air by said compressor (2,72) pressurization expands in expansion engine (70), and said expansion engine (70) drives a generator (71).
11. system as claimed in claim 4,
It is characterized in that,
Said heat exchanger is processed by stupalith.
12. system as claimed in claim 4,
It is characterized in that,
Said heat exchanger is processed by silit.
13. system as claimed in claim 4,
It is characterized in that,
The pressure of air that gets into heat exchanger at 3bar between the 5bar.
14. system as claimed in claim 4,
It is characterized in that,
The temperature of the air of entering heat exchanger is between 200 ℃ to 300 ℃.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20043884A NO331938B1 (en) | 2004-09-16 | 2004-09-16 | Method and system for energy recovery and / or cooling |
| NO20043884 | 2004-09-16 | ||
| PCT/NO2005/000330 WO2006031123A1 (en) | 2004-09-16 | 2005-09-09 | A method and a system for energy recovery and/or cooling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101044267A CN101044267A (en) | 2007-09-26 |
| CN101044267B true CN101044267B (en) | 2012-11-14 |
Family
ID=35057611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800354819A Expired - Fee Related CN101044267B (en) | 2004-09-16 | 2005-09-09 | Method and system for energy recovery and/or cooling |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20070261826A1 (en) |
| EP (1) | EP1805350A1 (en) |
| CN (1) | CN101044267B (en) |
| AU (1) | AU2005285621B2 (en) |
| BR (1) | BRPI0515342A (en) |
| CA (1) | CA2580038C (en) |
| NO (1) | NO331938B1 (en) |
| RU (1) | RU2384655C2 (en) |
| WO (1) | WO2006031123A1 (en) |
| ZA (1) | ZA200702194B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101610048B (en) * | 2008-06-16 | 2011-04-20 | 湖南晟通科技集团有限公司 | Device for using waste heat of aluminum electrolytic cell |
| CN101610047B (en) * | 2008-06-16 | 2011-04-20 | 湖南晟通科技集团有限公司 | Wind cooling type aluminum electrolytic cell waste heat utilizing device |
| CN101610046B (en) * | 2008-06-16 | 2011-04-20 | 湖南晟通科技集团有限公司 | Method for utilizing waste heat of aluminum electrolyzing cell |
| CN101880898B (en) * | 2009-05-04 | 2013-01-02 | 厦门热工环保系统工程有限公司 | Method for recovering flue gas waste heat of aluminum electrolysis cell |
| EP2360296B1 (en) | 2010-01-21 | 2017-03-15 | General Electric Technology GmbH | A method of ventilating an aluminium production electrolytic cell |
| WO2012136796A2 (en) | 2011-04-08 | 2012-10-11 | Bhp Billiton Aluminium Technologies Limited | Heat exchange elements for use in pyrometallurgical process vessels |
| CN103469253A (en) * | 2013-10-10 | 2013-12-25 | 郑州大学 | Forced heat transferring type aluminum electrolyzing groove |
| CN105220177B (en) * | 2014-06-30 | 2017-12-08 | 沈阳铝镁设计研究院有限公司 | Aluminium cell forced ventilation residual heat using device and Application way |
| CN104562086B (en) * | 2015-02-03 | 2017-09-19 | 奉新赣锋锂业有限公司 | A kind of temperature-adjustable metal lithium electrolytic bath |
| CN108866574B (en) * | 2018-09-05 | 2020-06-12 | 辽宁石油化工大学 | Heat exchange device for aluminum electrolytic cell |
| CN112126948A (en) * | 2020-09-24 | 2020-12-25 | 河南中孚铝业有限公司 | Lateral furnace side repairing system of aluminum electrolytic cell |
| CN113774431B (en) * | 2021-10-26 | 2024-07-12 | 中国华能集团清洁能源技术研究院有限公司 | Heat management system and method for alkaline hydrogen production electrolytic tank |
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| US4222841A (en) * | 1979-04-23 | 1980-09-16 | Alumax Inc. | Hall cell |
| WO1987000211A1 (en) * | 1985-07-09 | 1987-01-15 | H-Invent A/S | Cell arrangement for electrometallurgical purposes, in particular aluminun electrolysis |
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| US422841A (en) * | 1890-03-04 | Irving m | ||
| US4154055A (en) * | 1977-03-25 | 1979-05-15 | Ford Motor Company | Indirect Brayton energy recovery system |
| US4136516A (en) * | 1977-06-03 | 1979-01-30 | General Electric Company | Gas turbine with secondary cooling means |
| US4473754A (en) * | 1982-07-26 | 1984-09-25 | Williams International Corporation | Waste heat power generation system |
| JPS6183897A (en) * | 1984-09-28 | 1986-04-28 | Asahi Glass Co Ltd | Ceramic heat exchanging unit |
| GB2216191B (en) * | 1988-03-31 | 1992-08-12 | Aisin Seiki | Gas turbine cogeneration apparatus for the production of domestic heat and power |
| GB9211405D0 (en) * | 1992-05-29 | 1992-07-15 | Nat Power Plc | A compressor for supplying compressed gas |
| US5813215A (en) * | 1995-02-21 | 1998-09-29 | Weisser; Arthur M. | Combined cycle waste heat recovery system |
| US6318066B1 (en) * | 1998-12-11 | 2001-11-20 | Mark J. Skowronski | Heat exchanger |
| NO318012B1 (en) * | 2003-03-17 | 2005-01-17 | Norsk Hydro As | Structural elements for use in an electrolytic cell |
-
2004
- 2004-09-16 NO NO20043884A patent/NO331938B1/en not_active IP Right Cessation
-
2005
- 2005-09-09 US US11/662,279 patent/US20070261826A1/en not_active Abandoned
- 2005-09-09 RU RU2007114050/02A patent/RU2384655C2/en not_active IP Right Cessation
- 2005-09-09 BR BRPI0515342-5A patent/BRPI0515342A/en not_active IP Right Cessation
- 2005-09-09 CN CN2005800354819A patent/CN101044267B/en not_active Expired - Fee Related
- 2005-09-09 WO PCT/NO2005/000330 patent/WO2006031123A1/en active Application Filing
- 2005-09-09 EP EP05783822A patent/EP1805350A1/en not_active Withdrawn
- 2005-09-09 AU AU2005285621A patent/AU2005285621B2/en not_active Ceased
- 2005-09-09 CA CA2580038A patent/CA2580038C/en not_active Expired - Fee Related
-
2007
- 2007-03-15 ZA ZA200702194A patent/ZA200702194B/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4222841A (en) * | 1979-04-23 | 1980-09-16 | Alumax Inc. | Hall cell |
| WO1987000211A1 (en) * | 1985-07-09 | 1987-01-15 | H-Invent A/S | Cell arrangement for electrometallurgical purposes, in particular aluminun electrolysis |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101044267A (en) | 2007-09-26 |
| US20070261826A1 (en) | 2007-11-15 |
| AU2005285621B2 (en) | 2010-05-27 |
| RU2384655C2 (en) | 2010-03-20 |
| CA2580038C (en) | 2012-11-06 |
| RU2007114050A (en) | 2008-10-27 |
| AU2005285621A1 (en) | 2006-03-23 |
| EP1805350A1 (en) | 2007-07-11 |
| NO331938B1 (en) | 2012-05-07 |
| ZA200702194B (en) | 2008-09-25 |
| WO2006031123A1 (en) | 2006-03-23 |
| BRPI0515342A (en) | 2008-07-22 |
| CA2580038A1 (en) | 2006-03-23 |
| NO20043884L (en) | 2006-03-17 |
| NO20043884D0 (en) | 2004-09-16 |
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