CN116555841A - Flexible production system and method for aluminum electrolysis cell - Google Patents
Flexible production system and method for aluminum electrolysis cell Download PDFInfo
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- CN116555841A CN116555841A CN202310611427.4A CN202310611427A CN116555841A CN 116555841 A CN116555841 A CN 116555841A CN 202310611427 A CN202310611427 A CN 202310611427A CN 116555841 A CN116555841 A CN 116555841A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 172
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 172
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 165
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 27
- 238000012806 monitoring device Methods 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000012544 monitoring process Methods 0.000 claims abstract description 24
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims abstract description 15
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims abstract description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 47
- 239000003546 flue gas Substances 0.000 claims description 47
- 238000010438 heat treatment Methods 0.000 claims description 47
- 230000017525 heat dissipation Effects 0.000 claims description 37
- 230000001276 controlling effect Effects 0.000 claims description 33
- 239000000779 smoke Substances 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 239000003507 refrigerant Substances 0.000 claims description 17
- 230000002829 reductive effect Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 12
- 239000004411 aluminium Substances 0.000 claims description 10
- 239000002826 coolant Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 238000004904 shortening Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 description 12
- 238000004590 computer program Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000003860 storage Methods 0.000 description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 9
- 238000010248 power generation Methods 0.000 description 8
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 7
- 238000009826 distribution Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 230000009466 transformation Effects 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000036961 partial effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 239000012530 fluid Substances 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- C25C3/20—Automatic control or regulation of cells
-
- 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 Metals (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application discloses a flexible production system and a flexible production method for an aluminum electrolysis cell, which can be used for adjusting dynamic energy balance in the production process of the aluminum electrolysis cell so as to adapt to power supply fluctuation of clean energy sources. An aluminum electrolysis cell flexible production system comprising: an aluminum electrolysis cell; the upper energy control device is respectively connected with the cell cover plate and the flue of the aluminum electrolysis cell; the side energy control device is connected with a side cell shell of the aluminum electrolysis cell; the monitoring module is respectively connected with the upper energy control device, the lateral energy control device and the aluminum electrolysis cell and comprises an electric energy monitoring device, a temperature monitoring device and a flow monitoring device; the energy balance adjusting module is respectively connected with the upper energy control device and the side energy control device; the material balance adjusting device is connected with a blanking device of the aluminum electrolysis cell, and the blanking device comprises an alumina blanking device and an aluminum fluoride blanking device; and the total control module is respectively connected with the monitoring module, the energy balance adjusting module and the material balance adjusting device.
Description
Technical Field
The application relates to the technical field of aluminum electrolysis, in particular to a flexible production system and method of an aluminum electrolysis cell.
Background
At present, the energy balance of the prebaked cell is critical to the stable operation of the aluminum electrolysis series, the cell can be kept stable only by matching the input energy with the expenditure energy, and the electrolytic production can be kept stable. The aluminium electrolytic tank, especially the large-scale tank, is an electrochemical reaction system with large heat capacity and strong hysteresis, once the hot tank or the cold tank is generated, the original balance state can not be restored in a short time, the energy consumption and the material consumption in the recovery period can be greatly increased, and the indexes such as the service life of the tank are indirectly influenced, for example, accidents such as furnace leakage and tank stopping can be caused if the after-treatment of the sick tank is improper.
The modern aluminum industry is a consumer, and aluminum electrolysis series are generally provided with hundreds of electrolysis cells, so that higher electricity loads need to be supplied. At present, the electric power energy source for producing electrolytic aluminum in China is seriously dependent on coal power, and the coal power occupation ratio in the energy source structure of the electrolytic aluminum is up to 88%. Under the background of a double-carbon strategy, the thermal power consumption is reduced, the use proportion of clean energy is increased, and the method is one of effective paths for green carbon reduction development in the electrolytic aluminum industry in the future.
The development and utilization modes of the clean energy mainly comprise hydroelectric power generation, wind energy utilization, solar energy conversion and the like, and have the characteristics of volatility, seasonality, randomness and the like, for example, the hydroelectric power generation is greatly influenced by seasons, and the wind power generation and the solar power generation are greatly influenced by day and night and weather. For large-scale aluminum electrolysis series, unstable clean energy is adopted for power supply, load fluctuation frequently occurs on the power supply side, the energy balance of the electrolysis tank is easily damaged, and the stable operation of series production is seriously influenced.
Disclosure of Invention
The embodiment of the application provides a flexible production system and a flexible production method for an aluminum electrolysis cell, which can be used for adjusting dynamic energy balance in the production process of the aluminum electrolysis cell so as to adapt to power supply fluctuation of clean energy sources.
In a first aspect of embodiments of the present application, there is provided an aluminum electrolysis cell flexible production system comprising:
an aluminum electrolysis cell;
the upper energy control device is respectively connected with the cell cover plate and the flue of the aluminum electrolysis cell;
the side energy control device is connected with a side cell shell of the aluminum electrolysis cell;
the monitoring module is respectively connected with the upper energy control device, the side energy control device and the aluminum electrolysis cell and comprises an electric energy monitoring device, a temperature monitoring device and a flow monitoring device;
and the energy balance adjusting module is respectively connected with the monitoring module, the upper energy control device and the side energy control device.
In some embodiments, the upper energy control device comprises a first heat exchange device, a refrigerator, and a flue gas flow control device;
the first heat exchange device is respectively connected with the tank cover plate, the refrigerator and the flue, and the flue gas flow control device is connected with the flue;
The refrigerator and the flue gas flow control device are electrically connected with the energy balance adjusting module.
In some embodiments, the first heat exchange device comprises a first hot end, a first cold end, a working medium transmission pipeline, a heat medium flow control device and a refrigerant flow control device, wherein the first hot end is respectively connected with the flue and the working medium transmission pipeline, and the first cold end is respectively connected with the refrigerator and the working medium transmission pipeline;
the flue flow control device comprises a smoke exhaust branch pipe regulating valve, the smoke exhaust branch pipe regulating valve is arranged on a smoke exhaust branch pipe of the flue, and the heat medium flow control device and the flue flow control device share the smoke exhaust branch pipe regulating valve;
the refrigerant flow control device comprises a refrigerant control valve, and the refrigerant control valve is arranged in the refrigerator.
In some embodiments, the temperature monitoring device comprises a heat medium temperature monitoring device and a refrigerant temperature monitoring device, wherein the heat medium temperature monitoring device is arranged in a smoke exhaust branch pipe of the flue, and the refrigerant temperature monitoring device is arranged in the refrigerator;
the flow monitoring device comprises a heating medium flow monitoring device and a cooling medium flow monitoring device, wherein the heating medium flow monitoring device is arranged in the smoke exhaust branch pipe of the flue, and the cooling medium flow monitoring device is arranged in the refrigerator.
In some embodiments, the side energy control device comprises a plurality of second heat exchange devices disposed on the side wall shells between the cradle racks of the aluminum electrolysis cell;
one of the inlet and the outlet of each second heat exchange device is connected in parallel with a first circulation main pipeline through a regulating pump, the other of the inlet and the outlet of each second heat exchange device is connected in parallel with a second circulation main pipeline, and the first circulation main pipeline and the second circulation main pipeline are used for being communicated with a heat exchange circulation system.
In some embodiments, the first circulation header line is in communication with a second cold end of the heat exchange circulation system while the second heat exchange device is in a heat rejection state, the second circulation header line is in communication with a second hot end of the heat exchange circulation system;
and under the condition that the second heat exchange device is in a heat preservation state, the first circulating main pipeline is communicated with the second hot end, and the second circulating main pipeline is communicated with the second cold end.
In some embodiments, the conditioning pumps of different ones of the second heat exchange devices are controlled independently of each other.
In some embodiments, the aluminum electrolysis cell flexible production system further comprises:
the material balance adjusting device is connected with the discharging device of the aluminum electrolysis cell;
the total control module is respectively connected with the monitoring module, the material balance adjusting device and the energy balance adjusting module;
the blanking device comprises an alumina blanking device and an aluminum fluoride blanking device;
the electric energy monitoring device comprises an electricity inlet side current and voltage collector and an electricity outlet measuring current and voltage collector of the aluminum electrolysis cell.
In a second aspect of the embodiments of the present application, there is provided a flexible production method of an aluminum electrolysis cell, applied to the flexible production system of an aluminum electrolysis cell according to the first aspect, the method comprising:
the method comprises the steps of acquiring current and voltage of an electricity inlet side of an aluminum electrolysis cell acquired by an electric energy monitoring device through a monitoring module, and approving fluctuation of heating power of the aluminum electrolysis cell;
and respectively controlling an upper energy control device and/or a side energy control device by an energy balance adjusting module based on the fluctuation condition of the heating power so as to adjust the temperature of a cell cover plate, the temperature of a flue and/or the temperature of a side of the aluminum electrolysis cell.
In some embodiments, where the upper energy control device comprises a first heat exchange device, a refrigerator and a flue gas flow control device,
The energy balance adjusting module is used for respectively controlling the upper energy control device and/or the lateral energy control device based on the fluctuation condition of the heating power so as to adjust the temperature of the cell cover plate, the temperature of the flue and the temperature of the lateral part of the aluminum electrolysis cell, and the energy balance adjusting module comprises the following components:
under the condition that the heating power is increased by a first threshold value, controlling the first heat exchange device to be connected to the refrigerator through the energy balance adjusting module, and/or controlling the smoke flow control device to increase the smoke emission;
under the condition that the heating power is reduced by a second threshold value, controlling the first heat exchange device to be connected into the flue through the energy balance adjusting module, and/or controlling the flue gas flow control device to reduce the flue gas emission;
and/or the number of the groups of groups,
in case the side energy control means comprise a plurality of second heat exchange means,
the energy balance adjusting module is used for respectively controlling the upper energy control device and/or the lateral energy control device based on the fluctuation condition of the heating power so as to adjust the temperature of the cell cover plate, the temperature of the flue and the temperature of the lateral part of the aluminum electrolysis cell, and the energy balance adjusting module comprises the following components:
under the condition that the heating power is increased by the first threshold value, the energy balance adjusting module is used for controlling the first circulation main pipeline to be communicated with the second cold end of the heat exchange circulation system, and the second circulation main pipeline is communicated with the second hot end of the heat exchange circulation system;
Controlling the first circulation main pipeline to be communicated with the second hot end through the energy balance adjusting module under the condition that the heating power is reduced by the second threshold value, wherein the second circulation main pipeline is communicated with the second cold end;
and/or the number of the groups of groups,
in the case where the flexible production system of aluminium electrolysis cells comprises a material balance adjustment device,
the energy balance adjusting module is used for respectively controlling the upper energy control device and/or the lateral energy control device based on the fluctuation condition of the heating power so as to adjust the temperature of the cell cover plate, the temperature of the flue and the temperature of the lateral part of the aluminum electrolysis cell, and the energy balance adjusting module comprises the following components:
under the condition that the heating power is increased by the first threshold value, controlling and shortening the blanking time interval of the blanking device through the material balance adjusting device;
and under the condition that the heating power is reduced by the second threshold value, controlling and prolonging the blanking time interval of the blanking device through the material balance adjusting device.
According to the flexible production system of the aluminum electrolysis cell, the total control module can monitor the input energy of the aluminum electrolysis cell in real time, namely the change of the heating power of the system, when the power supply current fluctuates within a certain range, the material balance adjusting device can automatically adjust the consumption rate of materials such as aluminum oxide, aluminum fluoride and the like, the energy balance adjusting module can automatically adjust the heat dissipation power proportion distribution of each area of the aluminum electrolysis cell system, the dynamic energy balance and the material balance under the condition of the current transformation can be quickly established by the electrolysis cell, the requirements of flexible production of the aluminum electrolysis can be optimally met within a controllable range, the stable operation of the electrolysis cell under the fluctuation of the power supply load can be realized, the power supply fluctuation of clean energy sources can be adapted, and the normal production of the aluminum electrolysis is not influenced.
Drawings
FIG. 1 is a schematic block diagram of a flexible production system for aluminum electrolysis cells according to an embodiment of the present application;
FIG. 2 is a schematic partial side view of an aluminum electrolysis cell provided in an embodiment of the present application;
FIG. 3 is a schematic partial front view of an aluminum electrolysis cell provided in an embodiment of the present application;
FIG. 4 is a schematic block diagram of another flexible production system for aluminum electrolysis cells provided in accordance with an embodiment of the present application;
fig. 5 is a schematic flow chart of a flexible production method of an aluminum electrolysis cell according to an embodiment of the application.
Detailed Description
In order to better understand the technical solutions provided by the embodiments of the present specification, the following detailed description of the technical solutions of the embodiments of the present specification is made through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined with each other without conflict.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "two or more" includes two or more cases.
The energy balance of the aluminum electrolysis cell is crucial for the stable operation of the aluminum electrolysis series, the electrolysis cell can be kept stable only by matching the input energy with the expenditure energy, and the electrolysis production can be kept stable. The aluminium electrolytic tank, especially the large-scale tank, is an electrochemical reaction system with large heat capacity and strong hysteresis, once the hot tank or the cold tank is generated, the original balance state can not be restored in a short time, the energy consumption and the material consumption in the recovery period can be greatly increased, and the indexes such as the service life of the tank are indirectly influenced, for example, accidents such as furnace leakage and tank stopping can be caused if the after-treatment of the sick tank is improper. The modern aluminum industry is a consumer, and aluminum electrolysis series are generally provided with hundreds of electrolysis cells, so that higher electricity loads need to be supplied. At present, the electric power energy source for producing electrolytic aluminum in China is seriously dependent on coal power, and the coal power occupation ratio in the energy source structure of the electrolytic aluminum is up to 88%. Under the background of a double-carbon strategy, the thermal power consumption is reduced, the use proportion of clean energy is increased, and the method is one of effective paths for green carbon reduction development in the electrolytic aluminum industry in the future. At present, the development and utilization modes of clean energy mainly comprise hydroelectric power generation, wind energy utilization, solar energy conversion and the like, and have the characteristics of volatility, seasonality, randomness and the like, for example, the hydroelectric power generation is greatly influenced by seasons, and the wind power generation and the solar power generation are greatly influenced by day and night and weather. For large-scale aluminum electrolysis series, unstable clean energy is adopted for power supply, load fluctuation frequently occurs on the power supply side, the energy balance of the electrolysis bath is easily damaged, and the stable operation of series production is seriously influenced.
In view of the foregoing, embodiments of the present application provide a flexible production system and method for an aluminum electrolysis cell, which can perform dynamic energy balance adjustment in the production process of the aluminum electrolysis cell so as to adapt to power supply fluctuation of clean energy.
In a first aspect of the embodiments of the present application, there is provided a flexible production system for an aluminum electrolysis cell, and fig. 1 is a schematic block diagram of the flexible production system for an aluminum electrolysis cell according to the embodiments of the present application. As shown in fig. 1, the aluminum electrolysis cell flexible production system comprises: aluminum electrolysis cell 100, upper energy control device 200, side energy control device 300, monitoring module 400, and energy balance adjustment module 500. The upper energy control device 200 is respectively connected with the cell cover plate 110 and the flue 120 of the aluminum electrolysis cell 100; the side energy control device 300 is connected with the side 130 of the aluminum electrolysis cell; the monitoring module 400 is respectively connected with the upper energy control device 200, the side energy control device 300 and the aluminum electrolysis cell 100, and the monitoring module 400 comprises an electric energy monitoring device 410, a temperature monitoring device 420 and a flow monitoring device 430; the energy balance adjustment module 500 is connected to the monitoring module 400, the upper energy control device 200, and the side energy control device 300, respectively. The upper energy control device 200 may control the temperature and materials of the upper portion of the aluminum electrolysis cell 100, which includes the cell cover plate 110 and the flue 120, and the flue 120 may be used for discharging the flue gas. The side energy control device 300 may control the temperature of the side 130 of the aluminum electrolysis cell 100, the side 130, i.e., the side of the aluminum electrolysis cell 100, may include an exterior sidewall, as well as devices or components mounted on the sidewall, and the like. The monitoring module 400 can monitor the electricity consumption condition of the aluminum electrolysis cell 100 through the electric energy monitoring device 410, monitor the temperature of the corresponding position of the aluminum electrolysis cell 100 through the temperature monitoring device 420, and monitor the flow of the feeding, discharging and discharging smoke of the aluminum electrolysis cell 100 through the flow monitoring device 430. It should be noted that, the monitoring module 400 may also be connected to the upper energy control device 200, the side energy control device 300 and the energy balance adjustment module 500, so that the monitored data may be transmitted to the upper energy control device 200, the side energy control device 300 and the energy balance adjustment module 500, the energy balance adjustment module 500 may issue a control command to the upper energy control device 200 and the side energy control device 300 according to the received monitoring data, and the upper energy control device 200 and the side energy control device 300 may make corresponding adjustments according to the corresponding devices or structures of the control command to control the aluminum electrolysis cell 100.
According to the flexible production system of the aluminum electrolysis cell, the power consumption condition, the operation temperature and the operation flow data of the aluminum electrolysis cell 100 are monitored in real time through the monitoring module 400, the energy balance adjusting module 500 can analyze the data monitored by the monitoring module 400 and then issue an adjusting control instruction, the control instruction can be analyzed through the instructions of the upper energy control device 200 and the side energy control device 300, so that the flow, the temperature and the like of the corresponding device or structure of the aluminum electrolysis cell 100 are adjusted, the dynamic energy balance adjustment of the aluminum electrolysis cell is realized, the dynamic energy balance and the material balance under the condition of current transformation are quickly established, the requirement of flexible production of the aluminum electrolysis cell is optimally met in a controllable range, the stable operation of the aluminum electrolysis cell under the fluctuation of power supply load is realized, the power supply fluctuation of clean energy sources can be adapted, and the normal production of the aluminum electrolysis is not influenced.
In some embodiments, the upper energy control device 200 includes a first heat exchange device, a refrigerator, and a flue gas flow control device; the first heat exchange device is respectively connected with the tank cover plate, the refrigerator and the flue, and the flue gas flow control device is connected with the flue; the refrigerator and the smoke flow control device are electrically connected with the energy balance adjusting module. The first heat exchange device comprises a first hot end, a first cold end, a working medium transmission pipeline, a heating medium flow control device and a cooling medium flow control device, wherein the first hot end is respectively connected with the flue and the working medium transmission pipeline, and the first cold end is respectively connected with the refrigerator and the working medium transmission pipeline; the flue flow control device comprises a smoke exhaust branch pipe regulating valve, the smoke exhaust branch pipe regulating valve is arranged on a smoke exhaust branch pipe of the flue, and the heat medium flow control device and the flue flow control device share the smoke exhaust branch pipe regulating valve; the refrigerant flow control device comprises a refrigerant control valve which is arranged in the refrigerator.
Illustratively, the slot cover plate 110 may be a cavity structure, the refrigerator may provide a refrigerant to the first heat exchange device, and may be conveyed to the first heat exchange device through the working medium transmission pipeline and the first cold end, and the first heat exchange device may be communicated with the cavity of the slot cover plate 110, so as to implement cooling of the slot cover plate 110. The flue gas discharged in the flue 120 is usually a gas fluid mixed with solid and gas at a temperature higher than room temperature, the temperature can be hundreds of degrees celsius or even be more than one thousand degrees celsius, the flue gas discharged in the flue 120 can be recycled as a heating medium, and the flue gas is transmitted to a first heat exchange device through a working medium transmission pipeline and a first hot end, so that the heating temperature rise or heat preservation of the tank cover plate is realized. The heat medium flow control device can control the flow of the heat medium, namely the flow of the flue gas flowing into the first heat exchange device, and can be connected with the smoke exhaust branch pipe regulating valve for controlling the flow of the flue gas in the smoke exhaust branch pipe. The refrigerant flow control device can control the flow of the refrigerant, for example, the refrigerant can be cold air generated by a refrigerator, and the refrigerant flow control device can control the flow of the cold air which is introduced into the first heat exchange device.
Exemplarily, fig. 2 is a schematic partial side view of an aluminum electrolysis cell provided in an embodiment of the present application; fig. 3 is a schematic partial front view of an aluminum electrolysis cell provided in an embodiment of the present application. Referring to fig. 2 and 3, a cell cover plate 110 covers the top of the aluminum electrolysis cell 100, a surface close to the aluminum electrolysis cell 100 may be referred to as an inner layer 111, a surface far from the aluminum electrolysis cell may be referred to as an outer layer 112, the outer layer 112 may be provided with a plurality of reinforcing ribs 114 to increase the strength of the cell cover plate 110, and high temperature resistant felt sealing strips are attached to two ends of the cell cover plate 110 perpendicular to the inner layer 111 and the outer layer 112. The trough cover plate 110 may be made of aluminum or aluminum alloy plate or other materials, and the trough cover plate 110 may be of other shapes, without limitation.
For example, referring to fig. 2 and 3, the inlet 115 and the outlet 113 may be through holes provided on the slot cover plate 110, the inlet 115 and the outlet 113 are communicated with the cavity of the slot cover plate 110, the inlet 115 and the outlet 113 are also communicated with the first heat exchange device, the inlet 115 is used for introducing heat medium flue gas or cool medium air, the outlet 113 is used for guiding out the heat medium flue gas or cool medium air, and the cavity of the slot cover plate 110 may be used as a heat exchange cavity. The first connection head 101 may be a straight or three-way connection head, and the first connection head 101 may be used to connect the inlet 115 with the first heat exchanging device. The second connection head 102 may be used to connect the outlet 113 with the first heat exchange device.
Illustratively, referring to fig. 2 and 3, the bowl cover 110 further includes a lower insulating plate 116, an upper insulating plate 117, fins 118, and a thermal insulation coating 119.
Illustratively, referring to fig. 2 and 3, the working medium transmission pipeline includes a first pipeline 103, a second pipeline 104, an air outlet main 105, an air outlet branch 106, an air inlet branch 107, an air inlet main 108, and a refrigerator 109 induced draft fan 33. The first heat exchange device may be disposed within the cavity of the pocket plate 110, the first connection 101 may be connected to a first cold or hot end of the first heat exchange device, the inlet 115 may be a first cold or hot end, and the outlet 113 may be a first hot or cold end. The air outlet main pipe 105 is connected with a smoke exhaust branch pipe through a first pipeline 103, and an induced draft fan is arranged on the first pipeline 103; the air intake manifold 108 is connected with the smoke exhaust branch pipe through a second pipeline 104, and an induced draft fan and a refrigerator are arranged on the second pipeline 104. When the first heat exchange device is in a heat dissipation state and/or a heat preservation state, a draught fan on the refrigerator and/or the second pipeline 104 is started, cold air and/or hot medium smoke is introduced into the cavity of the tank cover plate 110 through the air inlet main pipe 108, and after heat exchange, the cold air and/or the hot medium smoke passes through the air outlet main pipe 105 and the first pipeline 103, and is discharged to the electrolytic tank smoke exhaust branch pipe under the action of the draught fan.
In some embodiments, the side energy control device 300 includes a plurality of second heat exchange devices disposed on the side wall shells between the cradle racks of the aluminum electrolysis cell 100; one of the inlet and the outlet of each second heat exchange device is connected in parallel with the first circulation main pipeline through the regulating pump, the other of the inlet and the outlet of each second heat exchange device is connected in parallel with the second circulation main pipeline, and the first circulation main pipeline and the second circulation main pipeline are used for being communicated with a heat exchange circulation system. Under the condition that the second heat exchange device is in a heat dissipation state, the first circulation main pipeline is communicated with the second cold end of the heat exchange circulation system, and the second circulation main pipeline is communicated with the second hot end of the heat exchange circulation system; and under the condition that the second heat exchange device is in a heat preservation state, the first circulation main pipeline is communicated with the second hot end, and the second circulation main pipeline is communicated with the second cold end. The regulating pumps of the different second heat exchange devices are controlled independently of each other.
In some embodiments, fig. 4 is a schematic block diagram of another aluminum electrolysis cell flexible production system provided by an example of the present application. As shown in fig. 4, the aluminum electrolysis cell flexible production system further comprises: the material balance adjusting device 600 is connected with the discharging device 140 of the aluminum electrolysis cell 100; the total control module 700 is respectively connected with the monitoring module 400, the material balance adjusting device 600 and the energy balance adjusting module 500; the blanking device 140 may include an alumina blanking device and an aluminum fluoride blanking device, alumina and aluminum fluoride being reaction materials of the aluminum electrolysis cell; the electrical energy monitoring device 410 may include an in-side current voltage collector and an out-side electrical current voltage collector of the aluminum electrolysis cell 100.
In some embodiments, the material balance adjusting device 600 can adjust the consumption rate of alumina and aluminum fluoride, and under the condition of current transformation, the material balance adjusting device 600 automatically adjusts the blanking rate of alumina and aluminum fluoride according to the current efficiency, the material unit consumption, the blanking capacity and other parameters of the aluminum electrolysis cell, and adds alumina and aluminum fluoride into the electrolysis cell according to different time intervals, so as to meet the flexible production process of the current transformation aluminum electrolysis.
Referring to fig. 2 and 3, the temperature monitoring device may include a heat flux meter for feeding back the heat dissipation power distribution based on the heat flux density of the target surface of the aluminum electrolysis cell. Illustratively, the surface of the aluminum cell system is divided into grids by taking the position of a cradle 71 as a horizontal axis coordinate point and the areas of the cathode and the anode of the aluminum cell as the vertical axis, the heat flux density of the grid surface of each area of the cathode and the anode of the aluminum cell is tested by adopting a heat flux meter, and the heat dissipation power distribution proportion of each area of the aluminum cell is quantitatively fed back. The flow monitoring device 430 comprises a flue gas temperature on-line monitoring device 31, the upper energy control device 200 can be connected with a flue gas branch pipe regulating valve 32, and the flue gas temperature on-line monitoring device 31 and the flue gas branch pipe regulating valve 32 are arranged on a flue gas branch pipe 3 of the aluminum electrolysis cell. The change of the temperature and flow of the flue gas is monitored in real time, and the change is transmitted to the monitoring module 400 in a wireless or wired mode, so that the heat taken away by the flue of the electrolytic cell is monitored in real time. The upper energy control device 200 adjusts the flow of the flue gas through the flue gas exhaust branch pipe regulating valve of the electrolytic cell, controls the heat taken away by the flue gas, and maintains the energy balance of the electrolytic cell.
For example, referring to fig. 2 and 3, the side energy control device 300 may be connected to a plurality of second heat exchange devices 5, the second heat exchange devices 5 being disposed on the side wall shells 7 between the cradle racks 71 of the aluminium electrolysis cell; one of the inlet and the outlet of each second heat exchange device 5 is connected in parallel with the first circulation header 52 by the regulating pump 51, the other of the inlet and the outlet of each second heat exchange device 5 is connected in parallel with the second circulation header 53, and the first circulation header 52 and the second circulation header 53 are for communication with the heat exchange circulation system 54.
The monitoring module 400 collects system voltage signals on the electricity inlet side and the electricity outlet side of the aluminum electrolysis cell, and the electric energy monitoring device 410 can monitor the change of the input energy of the aluminum electrolysis cell in real time, namely monitor the change of the heating power of the aluminum electrolysis cell, and the total control module 700 correspondingly adjusts the material balance adjusting device and the energy balance adjusting module according to the changed heating power and the material consumption rate under the current change condition so as to quickly establish dynamic energy balance and material balance.
Illustratively, with the second heat exchange device 5 in a heat-dissipating state, the first circulation header 52 communicates with the cold end of the heat exchange circulation system 54, and the second circulation header 53 communicates with the hot end of the heat exchange circulation system 54; in the case where the second heat exchange device 5 is in a heat-preserving state, the first circulation main pipe 52 is connected to the hot end of the heat exchange circulation system 54, and the second circulation main pipe 53 is connected to the cold end of the heat exchange circulation system 54. The adjusting pumps 51 of the different second heat exchanging devices 5 are controlled independently of each other, and can adjust the heat dissipation amount of the corresponding side wall of the tank.
In a second aspect of the embodiments of the present application, there is provided a flexible production method of an aluminum electrolysis cell, which is applied to the flexible production system of an aluminum electrolysis cell according to the first aspect, and fig. 5 is a schematic flow chart of the flexible production method of an aluminum electrolysis cell provided in the embodiments of the present application. As shown in fig. 5, the flexible production method of the aluminum electrolysis cell comprises the following steps:
s801: the method comprises the steps of acquiring current and voltage of an electricity inlet side of an aluminum electrolysis cell acquired by an electric energy monitoring device through a monitoring module, and approving fluctuation of heating power of the aluminum electrolysis cell;
s802: the upper energy control device and/or the side energy control device are/is controlled by the energy balance adjusting module respectively based on the fluctuation condition of heating power so as to adjust the temperature of the cell cover plate, the temperature of the flue and/or the temperature of the side of the aluminum electrolysis cell.
In some embodiments, where the upper energy control device includes a first heat exchange device, a refrigerator, and a flue gas flow control device, step S802 may include:
and under the condition that the heating power is increased by a first threshold value, controlling the first heat exchange device to be connected into the refrigerator through the energy balance adjusting module.
The flue gas discharge amount can be increased by controlling the flue gas flow control device.
And under the condition that the heating power is reduced by a second threshold value, controlling the first heat exchange device to be connected into the flue through the energy balance adjusting module.
The exhaust emission can be reduced by controlling the exhaust flow control device.
In case the side energy control means comprises a plurality of second heat exchanging means, step S802 may comprise:
and under the condition that the heating power is increased by the first threshold value, the energy balance adjusting module is used for controlling the first circulation main pipeline to be communicated with the second cold end of the heat exchange circulation system, and the second circulation main pipeline is communicated with the second hot end of the heat exchange circulation system.
And under the condition that the heating power is reduced by the second threshold value, the energy balance adjusting module is used for controlling the first circulation main pipeline to be communicated with the second hot end, and the second circulation main pipeline is communicated with the second cold end.
In the case where the flexible production system of aluminum electrolysis cells includes a material balance adjustment device, step S802 may include:
under the condition that the heating power is increased by a first threshold value, the material balance adjusting device is used for controlling and shortening the blanking time interval of the blanking device.
And under the condition that the heating power is reduced by a second threshold value, the material balance adjusting device is used for controlling and prolonging the blanking time interval of the blanking device.
The first threshold value and the second threshold value may be set according to the specific balance requirements of the flexible production of the aluminium electrolysis cell. For example, the first threshold may be 20kW and the second threshold may be 25kW, which is illustrative only and not intended to be limiting in any way.
Illustratively, in the steady state of the aluminum electrolysis cell, the system energy input into the aluminum electrolysis cell balances the electrochemical reaction energy expended in the aluminum electrolysis process and the energy lost in the heat dissipation of the cell system. Industrial aluminium electrolysis uses carbon anodes to produce high temperature molten aluminium when the anode product is pure CO 2 The theoretical energy consumption of aluminum electrolysis is 6.32kWh/kg when in gas. The comprehensive energy consumption of the large-scale aluminum electrolysis cell is close to 13kWh/kg at present, but the gap is still quite large compared with the theoretical value, so the thermodynamic efficiency of the aluminum electrolysis cell is lower, and about 50% of energy is lost from the surface heat dissipation of the electrolytic cell system. Under the condition of serial current change, the energy input into the electrolytic tank changes along with the change, if the heat dissipation of the surface of the aluminum electrolysis tank system is not matched, the aluminum electrolysis tank can shift to a hot stroke or a cold strokeThe stroke, such as the situation of too high or low bath temperature, can generate abnormal bath conditions such as hot bath or cold bath and the like when serious, and bring adverse effects to electrolytic production. The energy balance system of the aluminum electrolysis cell is an object for realizing energy balance regulation and control, and is selected on a closed interface formed between the electrolysis cell and the space environment. The static distribution and dynamic change of the heat dissipation energy of the aluminum cell system on the interface are the external appearance of the fluctuation of the cell condition of the aluminum cell, and the range of the heat dissipation power of each area on the surface of the large-scale aluminum cell system at present is as follows: the unit is expressed by voltage (V), the heat dissipation capacity of the smoke in the anode region is 0.28V-0.50V, the heat dissipation capacity of the groove cover plate is 0.38V-0.60V, the heat dissipation capacity of the side part of the cathode region is 0.4V-0.65V, and the heat dissipation capacity of the side part of the cathode region is 25-40%. Wherein, the surface heat dissipation of the anode is contained in the system, and indirectly influences the heat dissipation capacity of the flue gas and the tank cover plate.
Illustratively, the input energy of the aluminum electrolysis cell is a precondition for adjusting the energy balance of the electrolysis cell, and the electric energy monitoring device 410 collects system voltage signals at the anode guide rod 11 of the anode 1 at the power inlet side and the steel bar of the cathode 2 at the power outlet side of the electrolysis cell system, and monitors the change of the input energy of the electrolysis cell, namely the change of the heating power of the system in real time.
Illustratively, in the case of a 10% intensified current, i.e. a fluctuation in which the current value on the feed side increases by 10%, the aluminium electrolysis cell operating current reaches 550kA within the safety range allowed by the anode current density and the busbar current density. Under the condition that the pole pitch is kept unchanged, the total control module 700 controls the monitoring module 400 to collect the system voltage as 3.455v, and the approved system heating power is increased by 82.0kW. In the case where the first threshold is 20kW, 82kW exceeds 20kW, the adjustment of the enhanced heat dissipation may be performed.
The total control module 700 intervenes in time in the material balance adjusting device 600, the material balance adjusting device 600 automatically adjusts the consumption rate of aluminum oxide and aluminum fluoride, shortens the blanking time interval of aluminum oxide and aluminum fluoride, increases the total consumption amount of aluminum oxide, and meets the normal operation of the aluminum electrolysis cell under the intensified current.
The total control module 700 intervenes in time in the energy balance adjustment module 400, and the energy balance adjustment module 500 refers to the thermal characteristics of the aluminum electrolysis cell, and increases the heat dissipation power of the system by adjusting the flue gas flow control device and the side energy control device.
On-line adjustment electrolysis trough flue gas is through the heat of taking away of flue, through electrolysis trough exhaust gas branch pipe governing valve 32 adjustment flue gas flow, increases the flue gas and takes away heat 52.0kW, and flue gas flow heat dissipation adjustment is 199.5kW, accounts for 20.4% of total heat dissipation, satisfies the thermodynamic characteristics of electrolysis trough upper portion flue gas.
The second heat exchange device 5 connected with the side energy control device has an inlet arranged on the first circulation main pipeline 52 in parallel through the regulating pump 51, and an outlet arranged on the second circulation main pipeline 53 in direct parallel. The first circulation main pipeline 52 is communicated with the cold end of the heat exchange circulation system 54, and the second circulation main pipeline 53 is communicated with the hot end 54 of the heat exchange circulation system; the second heat exchange device 5 increases the heat exchange power of the side part of the electrolytic tank by 30.0kW through adjusting the pump 51, the heat dissipation of the side melt zone is adjusted to be 218.3kW, and the heat dissipation accounts for 22.4% of the total heat dissipation, thereby meeting the thermal characteristics of the side melt zone of the electrolytic tank.
Under the condition of 10% of intensified current, the energy balance adjusting module adjusts the corresponding heat dissipation proportion of the smoke flow control device and the lateral energy control device according to the increased heating power, so that the dynamic energy balance of the electrolytic tank under the condition of variable current is quickly established, and the flexible production operation of aluminum electrolysis is realized in a controllable range.
Illustratively, the aluminum electrolysis cell operating current was adjusted to 400kA with a 20% reduction in current. Under the condition that the polar distance is kept unchanged, the total control module collects the system voltage to be 2.513v, and the system heating power is reduced by 120.0kW.
The total control module intervenes in time in the material balance adjusting device, the material balance adjusting device automatically adjusts the consumption rate of aluminum oxide and aluminum fluoride, the blanking time interval of the aluminum oxide and the aluminum fluoride is prolonged, the total consumption amount of the aluminum oxide is reduced, and the normal operation of the aluminum electrolysis cell under the condition of reducing current is met.
The total control module intervenes in time in the energy balance adjustment module, and the energy balance adjustment module refers to the thermal characteristics of the aluminum electrolysis cell, and reduces the heat dissipation power of the system through the control of the heat dissipation capacity of the flue gas flow control device 32 and the second heat exchange device 5 by the side energy control device 300 and the upper energy control device 200.
The flue gas flow control device adjusts the heat taken away by the flue gas of the aluminum electrolysis cell on line, adjusts the flue gas flow through the flue gas discharge branch pipe regulating valve 32 of the electrolysis cell, reduces the flue gas to take away the heat by 70.0kW, and the heat dissipation of the flue gas flow is adjusted to 78.2kW, and accounts for 10.1% of the total heat dissipation, and the heat dissipation of the upper part of the electrolysis cell is greatly reduced.
The second heat exchange device 5 connected with the side energy control device has an inlet arranged on the first circulation main pipeline 52 in parallel through the regulating pump 51, and an outlet arranged on the second circulation main pipeline 53 in direct parallel. The first circulation main pipeline 52 is communicated with the hot end of the heat exchange circulation system 54, and the second circulation main pipeline 53 is communicated with the cold end of the heat exchange circulation system 54; the second heat exchange device 5 reduces the side heat exchange power of the aluminum electrolysis cell by 50.0kW through adjusting the pump 51, and the heat dissipation of the side melt zone is adjusted to 138.3kW, which accounts for 17.8% of the total heat dissipation. And the heat preservation of the side melt area of the electrolytic tank is enhanced through the hot end compensation of the heat exchange circulating system, and the normal furnace wall thickness of the electrolytic tank is maintained.
Under the condition of reducing the current by 20%, the energy balance adjusting module adjusts the corresponding heat dissipation proportion of the smoke flow control device and the lateral energy control device according to the reduced heating power, so that the dynamic energy balance of the electrolytic tank under the condition of changing the current is quickly established, and the flexible production operation of aluminum electrolysis is realized in a controllable range.
The embodiments described above are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The energy balance state of the aluminum electrolysis cell changes along with the change of the material balance state, the material balance adjusting device automatically adjusts the consumption rate of aluminum oxide and aluminum fluoride under the current transformation condition, and the aluminum oxide and the aluminum fluoride are added into the electrolysis cell according to the changed time interval, so that the flexible production operation of aluminum electrolysis under the current transformation is satisfied.
Reasonable heat dissipation of each area of the aluminum electrolysis cell system is the basis of stable operation of the aluminum electrolysis cell, the surface of the aluminum electrolysis cell system is subjected to grid division by energy balance simulation and test, and the heat dissipation power distribution characteristics of each area of the aluminum electrolysis cell are quantitatively fed back. The energy balance adjusting module dynamically adjusts the heat dissipation power distribution of each area of the electrolytic tank according to the thermal characteristic distribution of the electrolytic tank and the heat flow feedback of each module under the current-changing condition, and maintains the stable operation of the electrolytic tank.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-readable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Embodiments also provide a computer program product comprising computer software instructions that, when run on a processing device, cause the processing device to perform a process of a flexible production method of an aluminium electrolysis cell.
The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer readable storage media can be any available media that can be stored by a computer or data storage devices such as servers, data centers, etc. that contain an integration of one or more available media. Usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid State Disks (SSDs)), among others.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus, device, and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
While preferred embodiments of the present description have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present specification without departing from the spirit or scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims and the equivalents thereof, the present specification is also intended to include such modifications and variations.
Claims (10)
1. A flexible production system for an aluminum electrolysis cell, comprising:
an aluminum electrolysis cell;
the upper energy control device is respectively connected with the cell cover plate and the flue of the aluminum electrolysis cell;
the side energy control device is connected with a side cell shell of the aluminum electrolysis cell;
the monitoring module is respectively connected with the upper energy control device, the side energy control device and the aluminum electrolysis cell and comprises an electric energy monitoring device, a temperature monitoring device and a flow monitoring device;
and the energy balance adjusting module is respectively connected with the monitoring module, the upper energy control device and the side energy control device.
2. The flexible production system of aluminum electrolysis cell according to claim 1,
the upper energy control device comprises a first heat exchange device, a refrigerator and a smoke flow control device;
the first heat exchange device is respectively connected with the tank cover plate, the refrigerator and the flue, and the flue gas flow control device is connected with the flue;
the refrigerator and the flue gas flow control device are electrically connected with the energy balance adjusting module.
3. The flexible production system of aluminum electrolysis cell according to claim 2,
The first heat exchange device comprises a first hot end, a first cold end, a working medium transmission pipeline, a heat medium flow control device and a refrigerant flow control device, wherein the first hot end is respectively connected with the flue and the working medium transmission pipeline, and the first cold end is respectively connected with the refrigerator and the working medium transmission pipeline;
the flue flow control device comprises a smoke exhaust branch pipe regulating valve, the smoke exhaust branch pipe regulating valve is arranged on a smoke exhaust branch pipe of the flue, and the heat medium flow control device and the flue flow control device share the smoke exhaust branch pipe regulating valve;
the refrigerant flow control device comprises a refrigerant control valve, and the refrigerant control valve is arranged in the refrigerator.
4. The flexible production system of aluminum electrolysis cell according to claim 3,
the temperature monitoring device comprises a heating medium temperature monitoring device and a cooling medium temperature monitoring device, the heating medium temperature monitoring device is arranged in the smoke exhaust branch pipe of the flue, and the cooling medium temperature monitoring device is arranged in the refrigerator;
the flow monitoring device comprises a heating medium flow monitoring device and a cooling medium flow monitoring device, wherein the heating medium flow monitoring device is arranged in the smoke exhaust branch pipe of the flue, and the cooling medium flow monitoring device is arranged in the refrigerator.
5. The flexible production system of aluminum electrolysis cell according to claim 1,
the side energy control device comprises a plurality of second heat exchange devices which are arranged on side wall cell shells between cradle frames of the aluminum electrolysis cell;
one of the inlet and the outlet of each second heat exchange device is connected in parallel with a first circulation main pipeline through a regulating pump, the other of the inlet and the outlet of each second heat exchange device is connected in parallel with a second circulation main pipeline, and the first circulation main pipeline and the second circulation main pipeline are used for being communicated with a heat exchange circulation system.
6. The flexible production system of aluminum electrolysis cell according to claim 5,
when the second heat exchange device is in a heat dissipation state, the first circulation main pipeline is communicated with a second cold end of the heat exchange circulation system, and the second circulation main pipeline is communicated with a second hot end of the heat exchange circulation system;
and under the condition that the second heat exchange device is in a heat preservation state, the first circulating main pipeline is communicated with the second hot end, and the second circulating main pipeline is communicated with the second cold end.
7. The flexible production system of aluminum electrolysis cell according to claim 6,
the regulating pumps of the different second heat exchange devices are controlled independently of each other.
8. The flexible production system of aluminum electrolysis cell according to any one of claims 1 to 7, further comprising:
the material balance adjusting device is connected with the discharging device of the aluminum electrolysis cell;
the total control module is respectively connected with the monitoring module, the material balance adjusting device and the energy balance adjusting module;
the blanking device comprises an alumina blanking device and an aluminum fluoride blanking device;
the electric energy monitoring device comprises an electricity inlet side current and voltage collector and an electricity outlet measuring current and voltage collector of the aluminum electrolysis cell.
9. A flexible production method for an aluminum electrolysis cell, characterized by being applied to the flexible production system for an aluminum electrolysis cell according to any one of claims 1 to 8, comprising:
the method comprises the steps of acquiring current and voltage of an electricity inlet side of an aluminum electrolysis cell acquired by an electric energy monitoring device through a monitoring module, and approving fluctuation of heating power of the aluminum electrolysis cell;
and respectively controlling an upper energy control device and/or a side energy control device by an energy balance adjusting module based on the fluctuation condition of the heating power so as to adjust the temperature of a cell cover plate, the temperature of a flue and/or the temperature of a side of the aluminum electrolysis cell.
10. The flexible production process of aluminum electrolysis cell according to claim 9,
in case the upper energy control means comprises a first heat exchange means, a refrigerator and a flue gas flow control means,
the energy balance adjusting module is used for respectively controlling the upper energy control device and/or the lateral energy control device based on the fluctuation condition of the heating power so as to adjust the temperature of the cell cover plate, the temperature of the flue and the temperature of the lateral part of the aluminum electrolysis cell, and the energy balance adjusting module comprises the following components:
under the condition that the heating power is increased by a first threshold value, controlling the first heat exchange device to be connected to the refrigerator through the energy balance adjusting module, and/or controlling the smoke flow control device to increase the smoke emission;
under the condition that the heating power is reduced by a second threshold value, controlling the first heat exchange device to be connected into the flue through the energy balance adjusting module, and/or controlling the flue gas flow control device to reduce the flue gas emission;
and/or the number of the groups of groups,
in case the side energy control means comprise a plurality of second heat exchange means,
the energy balance adjusting module is used for respectively controlling the upper energy control device and/or the lateral energy control device based on the fluctuation condition of the heating power so as to adjust the temperature of the cell cover plate, the temperature of the flue and the temperature of the lateral part of the aluminum electrolysis cell, and the energy balance adjusting module comprises the following components:
Under the condition that the heating power is increased by the first threshold value, the energy balance adjusting module is used for controlling the first circulation main pipeline to be communicated with the second cold end of the heat exchange circulation system, and the second circulation main pipeline is communicated with the second hot end of the heat exchange circulation system;
controlling the first circulation main pipeline to be communicated with the second hot end through the energy balance adjusting module under the condition that the heating power is reduced by the second threshold value, wherein the second circulation main pipeline is communicated with the second cold end;
and/or the number of the groups of groups,
in the case where the flexible production system of aluminium electrolysis cells comprises a material balance adjustment device,
the energy balance adjusting module is used for respectively controlling the upper energy control device and/or the lateral energy control device based on the fluctuation condition of the heating power so as to adjust the temperature of the cell cover plate, the temperature of the flue and the temperature of the lateral part of the aluminum electrolysis cell, and the energy balance adjusting module comprises the following components:
under the condition that the heating power is increased by the first threshold value, controlling and shortening the blanking time interval of the blanking device through the material balance adjusting device;
and under the condition that the heating power is reduced by the second threshold value, controlling and prolonging the blanking time interval of the blanking device through the material balance adjusting device.
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| CN202310611427.4A CN116555841A (en) | 2023-05-24 | 2023-05-24 | Flexible production system and method for aluminum electrolysis cell |
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