CN114086215A - Method for adjusting calibration capacity of electrolytic cell - Google Patents
Method for adjusting calibration capacity of electrolytic cell Download PDFInfo
- Publication number
- CN114086215A CN114086215A CN202110977870.4A CN202110977870A CN114086215A CN 114086215 A CN114086215 A CN 114086215A CN 202110977870 A CN202110977870 A CN 202110977870A CN 114086215 A CN114086215 A CN 114086215A
- Authority
- CN
- China
- Prior art keywords
- electrolytic cell
- aluminum
- anode carbon
- anode
- aluminum electrolytic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
-
- 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
Landscapes
- 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)
Abstract
A method for adjusting the calibration capacity of an electrolytic cell is mainly applied to the electrolytic aluminum industry, the design structure of the aluminum electrolytic cell and the electrolytic aluminum production process. The technical characteristics are as follows: on the basis of keeping the whole current density of the anode carbon blocks of the aluminum electrolytic cell basically unchanged, the calibration capacity of the operation of the online production aluminum electrolytic cell is changed by adjusting the configuration number of the anode carbon blocks of the aluminum electrolytic cell and the conductive area of the cathode molten pool, so that the capacity of the online production aluminum electrolytic cell can adapt to the change of the power supply load of an external power grid and the requirement of limiting technical conditions, and the continuous and stable operation of the aluminum electrolytic cell is ensured.
Description
Technical Field
The invention relates to a method for adjusting the calibration capacity of an electrolytic cell, which is mainly applied to the electrolytic aluminum industry, the design structure of the aluminum electrolytic cell and the electrolytic aluminum production process.
Background
The electrolysis process of the aluminum electrolysis cell is a continuous and stable thermoelectric chemical reaction process. The direct current production power supply system of the aluminum electrolytic cell is a direct current production power supply system of the aluminum electrolytic cell with a plurality of standard capacities connected in series. Once the design calibration capacity of the aluminum electrolysis cell is determined, in order to ensure the continuity of the heat balance and the material balance of the aluminum electrolysis cell and the continuity and the stability of the chemical reaction, an external power grid power supply system capable of providing power energy for the production of the electrolytic aluminum is required to support, and the power supply load of the aluminum electrolysis cell is required to be stable, continuous and reliable.
The electric load of the electrolytic aluminum production series is a relatively stable value, and the load is related to the number of the aluminum electrolysis cells connected and configured on the series connection circuit and the calibration capacity. When the calibration capacity of the aluminum electrolysis cell and the number of the aluminum electrolysis cells are determined, the electricity utilization load of the direct current production system of the electrolytic aluminum production series is determined accordingly. In order to ensure continuous and stable production of the aluminum electrolytic cell, an external power grid power supply system of an electrolytic aluminum production enterprise, which can provide stable power energy, is required to be used for supporting. The continuous safe and stable operation of the electrolytic aluminum production system is restricted by the power supply load and the power supply quality of the external power grid power supply system of the aluminum electrolysis cell production enterprise.
If the power supply load of the external network is reduced due to objective reasons, the direct current production electric quantity load of the electrolytic workshop is reduced; if the load of the external network power supply load of the aluminum electrolytic cell is increased due to objective reasons, the direct current production power load of the electrolytic cell workshop can be increased. Only if the power supply load of the external power grid is matched with the direct current production power load of the electrolytic plant, the running parameters of the equipment of the aluminum electrolytic cell series and the working condition and technical condition of the aluminum electrolytic cell can be relatively stable. This is due to the thermoelectric chemical production characteristics of the aluminum cell production process.
If the heat balance electric energy input of the aluminum electrolytic cell is too low due to the external power grid load, the stability of material balance and heat balance in the aluminum electrolytic cell is damaged, so that the current efficiency of the aluminum electrolytic cell is reduced, the process condition of the aluminum electrolytic cell is also rapidly deteriorated, and even the risk of cell shutdown and the overall production shutdown of the electrolytic series are caused. Therefore, when the load change of the external power grid of the aluminum electrolysis enterprise is reduced or increased, the enterprise needs to be passive but needs to actively take corresponding technical measures to deal with the load change, and the production process of the aluminum electrolysis cell is technically adjusted, and the existing corresponding measures comprise the following two measures:
the method comprises the following steps: if the load of a direct current production power supply system for workshop production is reduced by 10 percent due to the reduction of the external network power supply load, the aluminum electrolysis cells are stopped for processing the aluminum electrolysis cells produced on line according to the quantity of 10 percent of equal proportion, and the aluminum electrolysis production line is withdrawn; when the power supply load of the external network of the aluminum electrolysis cell and the load of the direct current power supply system of the aluminum electrolysis cell can meet the production requirement of the electrolysis cell of the production system of the electrolysis shop, the stopped electrolysis cell is restarted to recover the normal production.
The disadvantage of this measure is that the cost of stopping or restarting the aluminum electrolytic cell is very high, and the damage of the cathode hearth structure of the aluminum electrolytic cell and the shortening of the service life cycle of the aluminum electrolytic cell can be caused along with the change of the thermal balance and the thermal stress in the structure of the aluminum electrolytic cell, which causes the increase of the construction cost of the electrolytic cell overhaul and the energy consumption and material cost of the secondary restart of the aluminum electrolytic cell enterprise.
The other method is that if the total load of the DC power supply system for workshop production is reduced due to the reduction of the power supply load of the external network, in order to ensure the continuous operation of the electrolytic cell, enterprises temporarily sink all the anode carbon blocks on part of the aluminum electrolytic cell, and directly drop the bottom palms of the anode carbon blocks into the aluminum liquid layer after the bottom palms of the anode carbon blocks penetrate the electrolyte liquid layer, so that the anode carbon blocks and the cathode aluminum liquid of the aluminum electrolytic cell are directly connected in a conductive manner without participating in the thermoelectric chemical reaction of the electrolyte liquid layer, and the anode conductive devices of the aluminum electrolytic cells only have the functions of short-circuit conduction of the power supply system and heat preservation of the resistance heat generated by the aluminum liquid layer in the aluminum electrolytic cell in the time period when the power supply load of the external network is reduced. Thereby dealing with the risk of stopping the aluminum electrolysis cell.
The disadvantages of this technical measure are: the aluminum electrolysis cell can play a role in heat preservation and heat balance in a certain time period within a short time of ton without emergency cell stopping. But consumes a large amount of electrical energy to maintain the thermal balance of the aluminum electrolysis cell. The loss of the reactive power consumption is extremely large, and the economic loss is not appreciated. .
The above two methods for coping with the reduction of the external power supply load of the aluminum electrolytic cell have many disadvantages as described above, but it is necessary to adopt the above method for coping with the external grid power supply load.
The electrolytic aluminum production is a high-energy-consumption industry, China is a high-capacity country for electrolytic aluminum, and with the promotion of the policy of double-carbon and energy-saving carbon emission, the electrolytic aluminum production mode mainly based on fossil energy in China is not suitable for the development of the electrolytic aluminum industry. The method is characterized in that the method is mainly used for generating the green new energy, and the green new energy mainly comprising water, electricity, solar energy and wind power has the common characteristics that the method is greatly influenced by natural conditions, the difference fluctuation of the output electric energy is large, the stability is poor, and the method cannot be adapted and matched with the continuous stability of the electrolytic aluminum production process. Therefore, the electrolytic aluminum production enterprises in China urgently need a production process technology which can deal with the power supply load change of the external network of the enterprises and is suitable for the production stability of the electrolytic aluminum so as to ensure the normal production of the electrolytic aluminum enterprises and approach to the green energy direction.
Disclosure of Invention
In order to enable the electrolytic cell for the online production of the electrolytic aluminum enterprises to cope with the situation that the load of an external network power supply system is variable, reduce the negative influence on the production stability of a direct current power supply system and an aluminum electrolytic cell in an electrolytic aluminum production workshop due to the fluctuation of the external network power supply load, and reduce the economic and technical loss brought to the electrolytic aluminum production enterprises due to the shutdown and the startup of the electrolytic cell. The transformation development of electrolytic aluminum production from fossil energy configuration to green new energy configuration is promoted for electrolytic aluminum enterprises. The invention provides a technical scheme for rapidly and reliably ensuring that an aluminum electrolysis cell for online production of an electrolytic aluminum enterprise production system can safely, stably and continuously operate due to the load change of an external power supply grid by an electrolytic aluminum enterprise,
the technical scheme provided by the invention is characterized in that when the external power grid load of an electrolytic aluminum production enterprise changes, the load of an electrolytic cell production direct current power supply system can be matched with the load of the power supply of the external power grid of the enterprise by adjusting the online working configuration quantity of the anode carbon blocks of the aluminum electrolytic cell and readjusting and setting the calibration capacity of the aluminum electrolytic cell on the basis of keeping the anode current density unchanged, so that the online production aluminum electrolytic cell can continuously and stably run. So as to avoid the reduction and the change of the power supply load of the external power grid, the shutdown risk brought to the electrolytic cell and the economic and technical loss.
According to the technical scheme: when the calibration capacity of the aluminum electrolysis cell is readjusted by adjusting the configuration quantity of the anode carbon blocks due to the change of the power supply load of an external network, the process parameters of the aluminum electrolysis cell are in a relatively stable numerical state on the basis of meeting the requirement that the current density of the anode carbon blocks in the online work of the aluminum electrolysis cell is basically unchanged and can be allowed, and therefore the continuous and stable operation of the aluminum electrolysis cell and the stability of the current efficiency are ensured.
According to the technical scheme: in order to change the calibration capacity of the aluminum electrolytic cell, the technical conditions of current density, working voltage and the like of the on-line working anode carbon blocks are in a relatively stable numerical state, and when the capacity of the aluminum electrolytic cell is adjusted, the method can be used for adjusting the configuration quantity of the anode carbon blocks fixedly arranged on the anode large bus of the aluminum electrolytic cell in a variable adjustment and increase mode.
According to the technical scheme: a specific method for adjusting the calibration capacity of an electrolytic cell comprises the following steps: when the load of an external grid of an electrolytic aluminum production series is reduced or increased, in order to ensure the continuous and stable operation of the aluminum electrolytic cell produced on line, on the basis of keeping the current density of the anode carbon block of the aluminum electrolytic cell basically unchanged, the calibration capacity of the aluminum electrolytic cell produced on line is changed by using a method for adjusting the online working configuration quantity of the anode carbon block of the aluminum electrolytic cell and the conductive area of a cathode molten pool in equal proportion according to the descending or ascending amplitude of the power supply load of the external grid, so that the calibration capacity of the aluminum electrolytic cell produced on line can be adapted to meet the requirement of the technical condition limited by the change of the power supply load of the external grid. The specific implementation methods include the following five methods:
the method comprises the steps that when the power supply load of an external power grid is reduced, the conductive connection of an aluminum guide rod and an anode large bus at the upper parts of a plurality of groups of anode carbon block steel claw groups on an aluminum electrolytic cell can be separated, an insulating plate is additionally arranged between the conductive connection surfaces of the aluminum guide rod and the anode large bus, and then a small box clamp is used for fixing the anode carbon block steel claw groups on the large bus, so that the anode carbon block steel claw groups are in a non-conductive state, and the bottom palms of the anode carbon blocks are suspended in an aluminum liquid layer or an electrolyte liquid layer in a molten pool of the aluminum electrolytic cell; can not participate in the electrolytic reaction. When the power supply load of an external power grid is changed in an increment mode and the anode conduction needs to be recovered, only the insulating plate between the aluminum guide rod and the anode large bus conduction connection transformer needs to be taken out and then fastened by a small box clamp, so that the conduction is recovered; the anode carbon block is equivalent to a carbon material heat preservation and insulation layer provided with a non-conductive electrolyte layer on the area.
And secondly, when the power supply load of an external power grid is reduced and changed, a plurality of groups of anode carbon block steel claw groups on the aluminum electrolytic cell can be integrally lifted, so that the bottom palm of the anode carbon block is higher than the upper part of the electrolyte liquid layer by a certain distance, and the anode carbon block does not conduct current to the cathode and does not participate in the thermoelectric chemical reaction. After the anode carbon block steel claw group is improved, the covering material and the carbon block on the anode of the group are kept in the original state, so that the functions of heat preservation, heat balance maintenance of the aluminum electrolytic cell and heat dissipation reduction are achieved. When the aluminum electrolysis design calibration capacity needs to be recovered for production, the steel claw group of the aluminum guide rod anode carbon block is only required to sink, so that the bottom palm of the anode carbon block is inserted into the electrolyte layer to participate in the thermoelectric chemical reaction.
And when the power supply load of the external power grid is changed in an increment manner and the anode conduction needs to be recovered, only the steel claw group of the anode carbon block is lifted up, so that the conductive connection between the aluminum guide rod and the anode large bus is recovered.
And fourthly, when the power supply load of the external power grid is changed in a decrement way, the conductive connecting surface between the aluminum guide rod at the upper part of the anode carbon block steel claw group and the anode large bus can be separated, the anode carbon block steel claw group is taken out from the molten pool of the aluminum electrolytic cell, the configuration quantity of the anode carbon blocks of the electrolytic cell and the conductive area of the molten pool of the aluminum electrolytic cell are reset by using a method for adjusting the configuration quantity of the anode carbon blocks of the electrolytic cell and the conductive area of the molten pool of the aluminum electrolytic cell on the basis of ensuring that the integral current density of the anode carbon blocks of the aluminum electrolytic cell is not changed, and when the power supply load of the external power grid is changed in an increment way and the original design calibration capacity of the aluminum electrolytic cell needs to be restored, the anode carbon block steel claws are only needed to be reinstalled and configured on the anode large bus, so that the function of the thermoelectric chemical reaction in the molten pool area can be restored.
And fifthly, when the power supply load of an external power grid is reduced and changed, taking the anode carbon blocks with the height lower than the aluminum liquid level and the electrolyte liquid level on the aluminum electrolytic bath for online production, reinstalling and configuring the position area by using a steel claw group of the anode carbon blocks with the height higher than the two levels, enabling the aluminum guide rod of the anode carbon blocks not to be in conductive contact with the anode large bus, and seating the bottom palms of the anode carbon blocks on the cathode carbon blocks. When the power supply load of an external power grid is changed in an increment mode and the original designed and calibrated capacity of the aluminum electrolytic cell needs to be recovered, the steel claw group of the anode carbon block is lifted to an electrolyte layer, and an aluminum guide rod is electrically connected with an anode large bus of the aluminum electrolytic cell, so that the anode carbon block can participate in the thermoelectric chemical reaction of a molten pool area.
According to the technical scheme: in order to seek optimization of process indexes of a single aluminum electrolysis cell and enable the current density of the anode carbon blocks working on line to be always in a relatively optimized numerical state, the number of the anode carbon blocks configured for a plurality of aluminum electrolysis cells in an aluminum electrolysis production power supply system example can be adjusted when the configuration number of the anode carbon blocks of the aluminum electrolysis cells is adjusted.
The implementation purpose of the technical scheme of the invention is as follows: in the production process of the aluminum electrolytic cell, the calibration capacity of the aluminum electrolytic cell can be readjusted by adopting the method of adjusting the configuration quantity of the anode carbon blocks of the aluminum electrolytic cell and adjusting the guide area of the cathode molten pool in time according to the power supply load of the external power grid and the time period, and the continuous and stable production of the aluminum electrolytic cell produced on line is carried out according to the technical conditions set by the load constraint of the external power grid power supply. Therefore, economic and technical losses such as groove stop and start caused by the change of the load of the external network power supply system can be avoided. And the production process of the existing electrolytic aluminum production enterprises can meet the configuration requirement of adopting green energy as electrolytic aluminum energy, and solves the technical problem that the continuous and stable production of the aluminum electrolysis cell for the on-line production of electrolytic aluminum is influenced by the large load fluctuation of an external power supply network in the existing electrolytic aluminum enterprises.
Drawings
FIG. 1 is a front elevation cross-sectional view of an aluminum electrolysis cell structure.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B of fig. 1.
The figures show that: 1 anode carbon block, 2 anode steel claws, 3 aluminum guide rods, 4 small box clamps, 5 aluminum liquid layers, 6 electrolyte liquid layers, 7 anode large buses, 8 cathode carbon blocks, 9 molten pools and 10 electrolytic cell shells.
Detailed Description
The aluminum electrolysis cells 176 with the current calibration capacity of 400KA of the online production system of a certain electrolytic aluminum production enterprise are provided with 48 groups of anode carbon blocks in each cell, and the average current density of the anode carbon blocks is 0.8A/cm2The total number of the anode carbon blocks on line of the electrolysis production system is 8448 blocks calculated according to the average working voltage of 4000 mV.
Under the influence of objective natural conditions, an external power grid can only provide power utilization load which is 90% of the required electric quantity load to an electrolytic aluminum enterprise within a certain time period, so that the load power supply quantity is reduced by 10%, and the aluminum electrolysis cell produced on line by the electrolytic aluminum enterprise is required to operate in a load limiting mode.
In the electrolytic aluminum production series, the calibration capacity of the aluminum electrolytic cell during online operation is reduced from 400KA to 360KA by a method for reducing the configuration quantity of the anode carbon blocks of the aluminum electrolytic cell by 10 percent in an equal proportion according to the reduction of the power supply load of an external power grid by 10 percent, and the total quantity of the anode carbon blocks of 176 stations of the electrolytic production system is reduced to 7603 blocks. Not only reduces 5 pieces of anode carbon blocks on average in each aluminum cell, but also does not participate in the electrolytic thermal conductivity chemical reaction.
The method has the advantages that the original traditional operation process for coping with the load change of the external power grid and the electric load of the aluminum electrolysis cell to be stopped can be averagely transferred and evenly distributed to each aluminum electrolysis cell of the online production system, and a plurality of aluminum electrolysis cells do not need to be selected, and the aluminum electrolysis cell is withdrawn from the online production line to be stopped. Thereby reducing the risk of sloshing and the cost of secondary start-up.
Similarly, if the load of the 400KA electrolytic cell is reduced by 20% due to the reduction of the external grid load, and the series of electrolytic aluminum production is carried out, the calibration capacity of the aluminum electrolytic cell during online operation is reduced from 400KA to 320KA by reducing the configuration quantity of the anode carbon blocks of the aluminum electrolytic cell by 20% in an equal proportion according to the reduction of the power supply load of the external grid by 20%, and the total quantity of the anode carbon blocks of 176 of the electrolytic production system is reduced by 6605 blocks. Not only reduces 10 pieces of anode carbon blocks on average in each aluminum cell, but also does not participate in the electrolytic thermal-conductivity chemical reaction.
Similarly, if the grid electricity price of the external power supply system is the peak valley electricity price, the enterprise can also adopt a method for changing and adjusting the online production calibration capacity of the aluminum electrolytic cell, and obtain greater economic benefits on the basis of ensuring the stable operation of the aluminum electrolytic cell, such as peak electricity consumption in daytime, when the electricity price is high, the reduction calibration capacity production is adopted, bottom valley electricity consumption in night time is adopted, and when the electricity price is low, the mode of enlarging the calibration capacity is adopted for electrolytic production.
The specific operation method can be carried out by referring to the following examples. As shown in fig. 1, 2 and 3.
Suppose that: if the power supply load of the external network is reduced by 10%, an aluminum electrolysis plant can configure 48 groups of anodes for aluminum electrolysis cells with 400KA capacity calibrated by the original design, reset the calibrated capacity of the aluminum electrolysis cells to 360KA, and adjust the number of anode carbon blocks of each aluminum electrolysis cell to 36, wherein the adjusting method comprises the following steps: and (3) selecting 4 aluminum guide rods of the anodes by using a multifunctional crown block, loosening the small box clamp on the anode large bus, and lifting the whole anode carbon block steel claw group to ensure that the bottom palm of the anode carbon block is higher than the upper part of the electrolyte liquid layer by a certain distance so as not to conduct current to the cathode and not to participate in the thermoelectric chemical reaction. After the anode carbon block steel claw group is improved, the covering material and the carbon block on the anode of the group are kept in the original state, so that the functions of heat preservation, heat balance maintenance of the aluminum electrolytic cell and heat dissipation reduction are achieved. When the aluminum electrolytic calibration capacity needs to be recovered to 400KA for production, the steel claw group of the aluminum guide rod anode carbon block is only required to sink, so that the bottom palm of the anode carbon block is inserted into the electrolyte layer to participate in the thermoelectric chemical reaction.
Suppose that: if the power supply load of the external network is reduced by 10%, an aluminum electrolysis plant can configure 48 groups of anodes for aluminum electrolysis cells with 400KA capacity calibrated by the original design, reset the calibrated capacity of the aluminum electrolysis cells to 360KA, and adjust the number of anode carbon blocks of each aluminum electrolysis cell to 36, wherein the adjusting method comprises the following steps: the multifunctional crown block is used for selecting 4 aluminum guide rods of the anodes, loosening the small box clamp on the anode large bus, and adding an insulating plate between the aluminum guide rods and the anode large bus to ensure that the anode current is not conducted to the cathode, and 4 groups of anode carbon blocks do not participate in the thermoelectric chemical reaction. At the moment, the cathode carbon blocks and the covering materials are kept in the original state, and only the functions of heat preservation, heat balance maintenance of the aluminum electrolytic cell and heat dissipation reduction are achieved. When the aluminum electrolytic calibration capacity needs to be recovered to 400KA for production, the insulating base plate between the aluminum guide rod and the anode large bus is taken out, so that the anode carbon block participates in the thermoelectric chemical reaction.
The two methods are more suitable for the calibration capacity adjustment of the aluminum electrolytic cell with small load change of the external power supply grid and off-peak power utilization. The method has the advantage that the design calibration capacity of the aluminum electrolytic cell can be quickly adjusted
If the difference of the load is larger when the external network supplies power and reduces the load, or the time period is longer. The following method is suggested. If the aluminum electrolytic cell with the designed and calibrated 400KA capacity needs to be changed to 320KA again for online operation, each aluminum electrolytic cell is provided with 48 groups of anodes and 40 groups of anode carbon blocks for online operation, 4 groups of anode carbon block steel claw groups can be selected on two end faces of the aluminum electrolytic cell respectively, an aluminum guide rod and a large cathode bus are disconnected and are in a non-conducting state, and then the bottom palm of the cathode carbon block is located on the cathode carbon block at the bottom of a molten pool of the aluminum electrolytic cell. At the moment, the anode carbon blocks which do not participate in the thermoelectric chemical reaction are used at the two ends of the aluminum electrolytic cell, the side furnace wall of the aluminum electrolytic cell is thickened, the conductive area of a molten pool of the aluminum electrolytic cell is reduced, the capacity of the aluminum electrolytic cell is reduced, and under the working condition, the aluminum electrolytic cell can be ensured to be capable of producing the aluminum electrolytic cell on line stably and continuously for a long time only by adjusting the material supply balance of alumina of the aluminum electrolytic cell under the condition that the current density is not changed, and higher current efficiency is kept. If the calibration capacity of the originally designed 400kA aluminum electrolytic cell needs to be recovered, during production, the anode carbon block steel claw groups are lifted, and the conductive connection between the aluminum guide rod and the anode large bus is recovered, so that the bottom palm of the anode carbon block enters an electrolyte layer to participate in a thermoelectric chemical reaction.
If the calibrated capacity of the aluminum electrolytic cell is reduced and adjusted, the conductive connection between the aluminum guide rod (3) at the upper part of the anode carbon block steel claw group and the anode large bus can be separated, and the anode carbon block steel claw group is taken out from the aluminum electrolytic cell molten pool (10), so that the area of the thermoelectric chemical reaction molten pool (1) area corresponding to the bottom palm of the anode carbon block (1) of the aluminum electrolytic cell is relatively reduced and is in an idle state.
The method has the advantages that if the calibrated capacity of the aluminum electrolytic cell needs to be increased and adjusted, and the anode conduction needs to be recovered, the anode carbon block steel claw group is only required to be reinstalled and configured on the anode large bus of the aluminum electrolytic cell, so that the thermoelectric chemical reaction function of the area is recovered.
When the anode carbon block is used for adjusting the calibration capacity of the aluminum electrolytic cell, if the non-conductive anode carbon block is located at the upper part of the cathode carbon block at the aluminum outlet end or the flue end of the aluminum electrolytic cell, which is equivalent to the fact that the thickness of the side furnace wall at the end part is increased, the length size of the molten pool of the aluminum electrolytic cell is shortened, and the area of the molten pool of the aluminum electrolytic cell is reduced. If the non-conductive anode carbon block is positioned at the upper part of the cathode carbon block in the middle of the aluminum electrolytic cell, the carbon anode carbon block partition wall for the aluminum electrolytic cell is equivalently used for dividing a molten pool of the aluminum electrolytic cell into two parts, and the arrangement of the partition wall can not only reduce the area of the molten pool of the aluminum electrolytic cell. But also can adjust the horizontal current and the magnetic current field of the aluminum electrolytic cell.
Claims (3)
1. A method for adjusting the calibration capacity of an electrolytic cell is a technical scheme of an aluminum electrolytic cell production system for dealing with the change of the power supply load of an external power grid, and is characterized in that: when the load of an external grid of an electrolytic aluminum production series is reduced or increased, in order to ensure the continuous and stable operation of the aluminum electrolytic cell produced on line, on the basis of keeping the current density of the anode carbon blocks of the aluminum electrolytic cell basically unchanged, the configuration quantity of the anode carbon blocks of the aluminum electrolytic cell and the conductive area of a cathode molten pool are adjusted in equal proportion according to the descending or ascending amplitude of the power supply load of the external grid, and the calibration capacity of the aluminum electrolytic cell produced on line is changed, so that the calibration capacity of the aluminum electrolytic cell produced on line can be adapted to meet the requirement of the technical condition limited by the change of the power supply load of the external grid, and the specific method comprises one of the following five options:
the method comprises the following steps: when the power supply load of an external power grid is reduced and changed, the conductive connection of the aluminum guide rods at the upper parts of a plurality of groups of anode carbon block steel claw groups on the aluminum electrolytic cell and the anode large bus can be separated, an insulating plate is added between the conductive connection surfaces of the aluminum guide rods and the anode large bus, and then a small box clamp is used for fixing the anode carbon block steel claw groups on the large bus, so that the anode carbon block steel claw groups are in a non-conductive state, and the bottom palms of the anode carbon blocks are suspended in an aluminum liquid layer or an electrolyte liquid layer in a molten pool of the aluminum electrolytic cell; can not participate in the electrolytic reaction; when the power supply load of an external power grid is changed in an increment mode and the anode conduction needs to be recovered, only the insulating plate between the aluminum guide rod and the anode large bus conduction connection transformer needs to be taken out and then fastened by a small box clamp, so that the conduction is recovered; the anode carbon block is equivalent to a carbon material heat preservation and insulation layer provided with a non-conductive electrolyte layer on the area;
the method 2 comprises the following steps: when the power supply load of an external power grid is reduced and changed, a plurality of groups of anode carbon block steel claw groups on the aluminum electrolytic cell can be integrally lifted, so that the bottom palm of the anode carbon block is higher than the upper part of an electrolyte liquid layer by a certain distance, the anode carbon block does not conduct current to a cathode and does not participate in a thermoelectric chemical reaction; when the aluminum electrolysis design calibration capacity needs to be recovered for production, only the steel claw group of the aluminum guide rod anode carbon block needs to be sunk, so that the bottom palm of the anode carbon block is inserted into the electrolyte layer to participate in the thermoelectric chemical reaction;
the method 3 comprises the following steps: when the power supply load of an external power grid is reduced and changed, the conductive connection between the aluminum guide rod and the anode large bus at the upper part of the anode carbon block steel claw group can be disconnected, so that the anode carbon block is in a non-conductive state, the anode carbon block sinks and is positioned on the cathode of the aluminum electrolytic cell, at the moment, the non-conductive anode carbon block sinks, the heat insulation function of a partition wall or the function of adjusting the distribution of a magnetic current field is realized, and when the power supply load of the external power grid is increased and the anode conduction needs to be recovered, the anode carbon block steel claw group only needs to be lifted, so that the conductive connection between the aluminum guide rod and the anode large bus is recovered.
The method 4 comprises the following steps: when the power supply load of the external power grid is changed in an increment mode, the anode carbon block steel claw is only required to be installed and configured on the anode large bus again to recover the thermoelectric chemical reaction function of the molten pool area by using the anode carbon block steel claw.
The method 5 comprises the following steps: when the power supply load of an external power grid is reduced and changed, the anode carbon blocks with the height lower than the aluminum liquid level and the electrolyte liquid level in the online production of the anode carbon blocks on the aluminum electrolytic cell can be taken out from the electrolytic cell, a steel claw group of the anode carbon blocks with the height higher than the two levels is used for being reinstalled and configured in the position area, an aluminum guide rod of the anode carbon blocks is not in conductive contact with a large anode bus, and the bottom palms of the anode carbon blocks are located on the cathode carbon blocks. When the power supply load of an external power grid is changed in an increment mode and the original designed and calibrated capacity of the aluminum electrolytic cell needs to be recovered, the steel claw group of the anode carbon block is lifted to an electrolyte layer, and an aluminum guide rod is electrically connected with an anode large bus of the aluminum electrolytic cell, so that the anode carbon block can participate in the thermoelectric chemical reaction of a molten pool area.
2. Method for adjusting the nominal capacity of an electrolytic cell according to claim 1, characterized in that
When the configuration quantity of the anodes of the aluminum electrolytic cell is utilized to adjust the calibration capacity of the aluminum electrolytic cell, the non-conductive anode carbon blocks are positioned at the upper parts of the cathode carbon blocks at the aluminum outlet end or the flue end of the aluminum electrolytic cell, which is equivalent to increase the thickness of the side furnace wall at the end part, the length size of a molten pool of the aluminum electrolytic cell is shortened, and the area of the molten pool of the aluminum electrolytic cell is reduced; the non-conductive anode carbon block is located at the upper part of the cathode carbon block in the middle of the aluminum electrolytic cell, which is equivalent to dividing a molten pool of the aluminum electrolytic cell into two parts by a carbon anode carbon block partition wall, and the arrangement of the partition wall can not only reduce the area of the molten pool of the aluminum electrolytic cell, but also adjust the horizontal current and the magnetic current field of the aluminum electrolytic cell.
3. A method for adjusting the nominal capacity of an electrolytic cell according to claim 1, characterized in that: when the external grid load of the electrolytic aluminum production series is reduced or increased, the configuration quantity of the anode carbon blocks of the online-production aluminum electrolytic cell is adjusted by using a method of adjusting the configuration quantity and the configuration quantity of the anode carbon blocks of the online-production aluminum electrolytic cell in equal proportion according to the reduction or increase amplitude of the external grid power supply load, so that the calibration capacity of the online-production aluminum electrolytic cell is realized, and the online-production electrolytic cell production system can meet the requirement of the external grid power supply load change limiting technical condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110977870.4A CN114086215A (en) | 2021-08-16 | 2021-08-16 | Method for adjusting calibration capacity of electrolytic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110977870.4A CN114086215A (en) | 2021-08-16 | 2021-08-16 | Method for adjusting calibration capacity of electrolytic cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114086215A true CN114086215A (en) | 2022-02-25 |
Family
ID=80296330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110977870.4A Pending CN114086215A (en) | 2021-08-16 | 2021-08-16 | Method for adjusting calibration capacity of electrolytic cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114086215A (en) |
-
2021
- 2021-08-16 CN CN202110977870.4A patent/CN114086215A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113249738B (en) | Novel water electrolysis hydrogen production system and operation method thereof | |
| CN103545905B (en) | A kind of photovoltaic direct-current micro-grid energy coordination control method | |
| CN112803472A (en) | Direct-current coupling hydrogen production system and control method thereof | |
| JP6936179B2 (en) | Hydrogen production system | |
| CN102234819B (en) | Preheating starting method for aluminium electrolysis cell | |
| KR102306918B1 (en) | Renewable energy hybrid power generation system, and power generation method therefor | |
| CN111668847B (en) | Power optimization distribution method and system for cross-cell photovoltaic absorption | |
| CN108574277B (en) | Power electronic system model of large-scale water electrolysis hydrogen production equipment | |
| CN101358358B (en) | Single anode shunt and regulation apparatus electrolyzed by multiple anodes cell and method | |
| US20230043491A1 (en) | Off-grid electrolysis control method and device thereof independent of grid | |
| CN114997544A (en) | Method and system for optimizing and configuring capacity of hydrogen optical storage charging station | |
| CN105734612B (en) | A kind of method that unstable wind-powered electricity generation is dissolved using electrolysis series | |
| AU2011204683B2 (en) | Bottom structure of electrolytic cell | |
| CN201898365U (en) | Energy supply system for multiple power supplies | |
| CN114086215A (en) | Method for adjusting calibration capacity of electrolytic cell | |
| CN101024884A (en) | Non-merged-net wind-driven power-supplying method and apparatus of high energy-consumption industry | |
| CN105656179A (en) | Data center with function of utilizing novel energy and low PUE (power usage effectiveness) value | |
| CN114086214A (en) | Method for adjusting calibration capacity of electrolytic cell | |
| CN111354966B (en) | Energy storage unit of all-vanadium redox flow battery system and method for improving direct-current side voltage of energy storage unit | |
| CN206692745U (en) | Electrolysis unit | |
| CN201210660Y (en) | Residue heat utilization apparatus for aluminum cell | |
| CN110896215A (en) | Comprehensive optimization configuration method for current-limiting reactor and circuit breaker of direct-current power distribution system | |
| CN207259609U (en) | First of potline work area groove is met an urgent need short-circuiting means | |
| CN207259608U (en) | Potline work area end platform groove is met an urgent need short-circuiting means | |
| CN202148356U (en) | Electrolysis and electrodeposition process current short circuit device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |