CN108411341B - Heat balance adjusting system for absorbing unstable new energy and implementation method - Google Patents
Heat balance adjusting system for absorbing unstable new energy and implementation method Download PDFInfo
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- CN108411341B CN108411341B CN201810146726.4A CN201810146726A CN108411341B CN 108411341 B CN108411341 B CN 108411341B CN 201810146726 A CN201810146726 A CN 201810146726A CN 108411341 B CN108411341 B CN 108411341B
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Abstract
A thermal balance adjusting system for absorbing unstable new energy and an implementation method thereof comprise: the device comprises an aluminum electrolytic cell (1), an anode current detection module (3), a flow control module (4), a flow control valve (5), a heat exchanger (6) and a conveying pipe (7); the anode current detection module (3) is arranged at the anode of the aluminum electrolytic cell (1) and used for detecting an anode current signal of the aluminum electrolytic cell and transmitting the anode current signal to the flow control module (4); the flow control module (4) is connected with the anode current detection module (3) and is used for controlling the flow control valve (5); the flow control valve (5) is arranged on the conveying pipe (7) and used for controlling the flow of the heat-conducting medium; the conveying pipe (7) is connected with the aluminum electrolytic cell (1) provided with the converter (6). The technical scheme provided by the invention can realize the adjustment of the heat balance of the aluminum electrolytic cell when the unstable new energy is absorbed, and is beneficial to forming a stable furnace side shape, so that the aluminum electrolytic cell can stably run while the unstable new energy is absorbed.
Description
Technical Field
The invention belongs to the technical field of aluminum electrolysis, and particularly relates to a heat balance adjusting system for consuming unstable new energy and an implementation method thereof.
Background
With the increasing importance of environmental protection in countries of the world, people favor the development and utilization of new energy sources more and more than traditional energy sources such as coal and petroleum. Solar energy, wind energy, ocean energy and the like are unconventional energy sources developed and utilized by means of scientific technology, are typical representatives of new energy sources, and the new energy sources have the characteristics of no pollution and reproducibility, and the new energy sources are used for generating electricity to convert the new energy sources into electric energy so as to realize sustainable development of resources. Although the power generation capacity of new energy sources is increased year by year, the power generation capacity is not stable due to the change of seasons, weather and the like of most new energy sources, and the power transmission and adjustment capacity of a power grid is limited, so that the new energy sources are not effectively consumed.
The aluminum electrolysis is a high-energy-consumption enterprise which is extremely dependent on electric power resources, if the local consumption of the aluminum electrolysis cell on new energy power generation can be realized in an area with rich new energy resources and large aluminum electrolysis capacity, and the local consumption of the aluminum electrolysis cell on wind power generation needs to be realized due to the characteristic of fluctuation of the new energy power generation along with time, so that the aluminum electrolysis cell has the capability of adapting to the instability of the new energy power generation. When the aluminum electrolytic cell consumes new energy, the heat income of the electrolytic cell is changed due to the instability of the consumed electric quantity, the heat balance of the electrolytic cell is damaged, and the aluminum electrolytic cell is difficult to stably operate.
From the view point of heat income and expenditure of the aluminum electrolytic cell, the heat income of the aluminum electrolytic cell mainly comes from the joule heat of the electrolyte melt, and the heat dissipation of the electrolytic cell is mainly concentrated on the upper covering material, the steel claws and the lateral cell shell of the electrolytic cell, wherein the upper heat dissipation accounts for about 50 percent of the total heat dissipation, and the lateral cell shell heat dissipation accounts for about 35 percent of the total heat dissipation. The upper structure of the aluminum electrolytic cell is complex, the structures of a smoke exhaust pipeline, a blanking bin and the like exist, and mass production operations such as blanking, crust breaking, pole changing, anode lifting and the like exist on the upper part, so that the heat balance of the aluminum electrolytic cell is difficult to adjust through the upper part of the aluminum electrolytic cell in the prior art. When the new energy is consumed by the aluminum electrolytic cell, the heat income of the electrolytic cell is changed due to the instability of the consumed electric quantity, the heat balance of the electrolytic cell is damaged, and the aluminum electrolytic cell is difficult to stably operate.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a thermal balance adjusting system for absorbing unstable new energy and a realization method thereof.
The invention provides a heat balance adjusting system for absorbing unstable new energy, which comprises the following steps:
a thermal balance adjustment system that dissipates an unstable new energy source, comprising:
the device comprises an aluminum electrolytic cell 1, an anode current detection module 3, a flow control module 4, a flow control valve 5, a heat exchanger 6 and a conveying pipe 7;
the anode current detection module 3 is arranged at the anode of the aluminum electrolytic cell 1 and used for detecting an anode current signal of the aluminum electrolytic cell and transmitting the anode current signal to the flow control module 4;
the flow control module 4 is connected with the anode current detection module 3 and is used for controlling the flow control valve 5;
the flow control valve 5 is arranged on the conveying pipe 7 and used for controlling the flow of the heat-conducting medium;
the conveying pipe 7 is connected with the aluminum electrolytic cell 1 provided with the heat exchanger 6.
Preferably, the flow control module 4 controls the flow control valve 5 according to the following formula:
in the formula, QRegulating flowM is the flow of the heat exchange medium to be adjusted3/h；QRegulating flowIs the medium flow size under the reference current, m3/h；IDetection ofDetecting the actual current magnitude for absorbing new energy A; i isDatumIs the current magnitude under the reference current, A; eta is a constant and is determined according to the type of new energy consumption, the specific model of the electrolytic cell and the production condition.
Preferably, the method further comprises the following steps:
a return pipe 8, a condenser 9, a heat preservation storage 10 and a connecting pipe 11;
the condenser 9 is arranged between the return pipe 8 and the connecting pipe 11;
the thermal insulation storage 10 is arranged between the connecting pipe 11 and the conveying pipe 7.
Preferably, the method comprises the following steps:
the heat exchanger 6 is connected with the delivery pipe 7 and the return pipe 8 through flanges;
the condenser 9 is connected with the return pipe 8 and the connecting pipe 11 through flanges;
the thermal insulation storage 10 is connected with the connecting pipe 11 and the conveying pipe 7 through flanges.
Preferably, the method comprises the following steps:
the temperature of the return pipe 8 at the outlet end of the heat exchanger 6 is controlled to be 200-400 ℃.
Preferably, the heat conducting medium comprises molten salt;
the temperature of the molten salt in the conveying pipe 7 positioned at the inlet end of the heat exchanger 6 is controlled to be 100-200 ℃.
Preferably, the molten salt comprises:
mixtures of different metal nitrates, different metal chlorides, metal oxides or metal nitrates.
Another objective of the present invention is to provide a method for implementing a thermal balance adjustment system for absorbing unstable new energy, comprising:
when the aluminum electrolytic cell 1 consumes unstable new energy, the anode current detection module 3 detects the anode current of the electrolytic cell and transmits a detected current signal to the flow control module 4;
the flow control module 4 adjusts the molten salt flow control valve 5 according to the magnitude of the current signal, and controls the molten salt entering the heat exchanger 6 from the conveying pipe 7 to enable the aluminum electrolytic cell 1 to dissipate heat in balance.
Preferably, the method further comprises the following steps:
the heated molten salt in the heat exchanger 6 enters a condenser 9 through a return pipe 8; after cooling, the mixture flows into a heat preservation storage 10 through a connecting pipe 11; and flows into the heat exchanger 6 through the duct 7 to be circulated.
Preferably, the method comprises the following steps:
the temperature of the return pipe 8 at the outlet end of the heat exchanger 6 is controlled to be 200-400 ℃.
Preferably, the heat conducting medium comprises molten salt;
the temperature of the molten salt in the conveying pipe 7 positioned at the inlet end of the heat exchanger 6 is controlled to be 100-200 ℃.
Preferably, the molten salt comprises:
mixtures of different metal nitrates, different metal chlorides, metal oxides or metal nitrates. Preferably, the unstable new energy source comprises: the new energy of wind power generation, solar power generation or geothermal power generation.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
according to the technical scheme, when the electrolytic cell consumes the unstable new energy, the heat dissipation capacity of the electrolytic cell is controlled by detecting the anode current in real time and controlling the fused salt flow at the inlet of the heat exchanger according to the non-distributed current, so that heat exchange can be rapidly and efficiently carried out on the cell shell of the aluminum electrolytic cell, the thermal balance adjustment of the electrolytic cell is realized, the stable furnace wall shape is favorably formed, and the electrolytic cell operates under the stable thermal balance condition when the unstable new energy is consumed.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of a system configuration of an aluminum electrolysis cell shell of the present invention;
FIG. 3 is a schematic view of the system configuration of the entire aluminum electrolysis cell side cell shell of the present invention;
1-aluminum electrolysis cell, 2-side cell shell, 3-anode current detection module, 4-flow control module, 5-flow control valve, 6-heat exchanger, 7-delivery pipe, 8-return pipe, 9-condenser, 10-heat preservation storage and 11-connecting pipe.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
A heat balance adjusting system for absorbing unstable new energy mainly comprises an anode current detection module, a flow control valve, a heat exchanger, a conveying pipe, a return pipe, a connecting pipe, a condenser, a heat preservation storage device and the like.
The shell of the aluminum electrolytic cell is provided with a heat exchanger, and molten salt with low melting point is used as a heat conducting medium in the heat exchanger. Compared with other heat conducting media (such as heat conducting oil, water, liquid metal and the like), the low-melting-point molten salt has the characteristics of strong heat transfer capacity, higher use temperature, high safety and the like, and can quickly carry out heat exchange on the cell shell.
When the aluminum electrolytic cell consumes unstable new energy, the anode current detection module is arranged at the anode of the aluminum electrolytic cell to detect the anode current of the electrolytic cell in real time, and the detected current signal is transmitted to the flow control module.
The flow control module adjusts the molten salt flow control valve according to the real-time current distribution size, and controls the molten salt flow entering the heat exchanger from the conveying pipe, so that the heat dissipation of the electrolytic cell is controlled.
The flow control module comprises three sub-modules: the anode current signal receiving submodule, the flow adjustment calculating submodule and the flow adjustment signal output submodule. The anode current signal receiving submodule is used for receiving the anode current magnitude value obtained by the anode current detection system and then inputting data to the flow adjustment calculation submodule; the flow regulation calculation submodule calculates the flow of the heat exchange medium to be regulated according to the following formula, and then outputs the value signal and controls the opening size of the flow control valve to regulate the flow of the heat exchange medium.
In the formula, QRegulating flowM is the flow of the heat exchange medium to be adjusted3/h；QRegulating flowIs the medium flow size under the reference current, m3/h；IDetection ofDetecting the actual current magnitude for absorbing new energy A; i isDatumIs the current magnitude under the reference current, A; eta is a constant and is determined according to the type of new energy consumption, the specific model of the electrolytic cell and the production condition.
The low-melting-point molten salt heated in the heat exchanger enters the condenser through the return pipe, flows into the heat preservation storage through the connecting pipe for storage after being cooled, and flows into the heat exchanger through the conveying pipe for cyclic application. The composition of the molten salt can be a mixture of different metal nitrates, a mixture of different metal chlorides, metal oxides or metal nitrates, or a mixture of different metal chlorides, metal oxides or metal carbonates.
The melting point of the molten salt is required to be 50-150 ℃.
The temperature of the molten salt in the conveying pipe at the inlet end of the heat exchanger is controlled to be 100-200 ℃; the temperature of a return pipe at the outlet end of the heat exchanger is controlled to be 200-400 ℃.
The temperature in the holding reservoir is ensured to be greater than the melting point of the molten salt.
The flow control valve is arranged on the conveying pipe between the heat preservation storage and the heat exchanger.
The heat exchanger is connected with the conveying pipe and the return pipe, the condenser is connected with the return pipe and the connecting pipe, the heat preservation storage device is connected with the connecting pipe and the conveying pipe through flanges, and the connecting parts are provided with insulating parts.
The consumed unstable new energy comprises all new energy which can be used for power generation and is represented by wind power generation, solar power generation and geothermal power generation.
The schematic diagram of the aluminum cell heat balance adjusting system for absorbing unstable new energy is shown in figure 1,
the shell 2 of the aluminum electrolytic cell 1 is provided with a heat exchanger 6, and molten salt with low melting point is used as a heat conducting medium in the heat exchanger 6. When the wind power is absorbed by the aluminum electrolytic cell, the anode current detection module 3 is arranged at the anode of the aluminum electrolytic cell, the anode current of the electrolytic cell is detected in real time, the detected current signal is transmitted to the flow control module 4, the molten salt flow control valve 5 is adjusted by the flow control module 4 according to the distribution size of the real-time current, and the molten salt flow entering the heat exchanger from the conveying pipe 7 is controlled, so that the heat dissipation of the electrolytic cell is controlled. The molten salt heated in the heat exchanger enters the condenser 9 through the return pipe 8, is cooled, flows into the heat-insulating storage 10 through the connection pipe 11, is stored, and flows into the heat exchanger 6 through the delivery pipe 7 for circulation.
The composition of the molten salt can be a mixture of different metal nitrates, a mixture of different metal chlorides, metal oxides and metal nitrates, or a mixture of different metal chlorides, metal oxides and metal carbonates. The melting point of the molten salt is required to be 50-150 ℃.
The temperature of the molten salt in the conveying pipe 7 at the inlet end of the heat exchanger 6 is controlled to be 100-200 ℃; the temperature of the return pipe 8 at the outlet end of the heat exchanger 6 is controlled to be 200-400 ℃. The temperature in the holding reservoir 10 is ensured to be greater than the melting point of the molten salt.
The flow control valve 5 is mounted on the duct 7 between the insulated reservoir 10 and the heat exchanger 6. The heat exchanger 6 is connected with the delivery pipe 7 and the return pipe 8, the condenser 9 is connected with the return pipe 8 and the connecting pipe 11, the heat preservation storage device 10 is connected with the connecting pipe 11 and the delivery pipe 7 through flanges, and the connecting parts are provided with insulating parts.
Another objective of the present invention is to provide a method for implementing a thermal balance adjustment system for absorbing unstable new energy, comprising:
when the aluminum electrolytic cell 1 consumes unstable new energy, the anode current detection module 3 detects the anode current of the electrolytic cell and transmits a detected current signal to the flow control module 4;
the flow control module 4 adjusts the molten salt flow control valve 5 according to the magnitude of the current signal, and controls the molten salt entering the heat exchanger 6 from the conveying pipe 7 to enable the aluminum electrolytic cell 1 to dissipate heat in balance.
Further comprising:
the heated molten salt in the heat exchanger 6 enters a condenser 9 through a return pipe 8; after cooling, the mixture flows into a heat preservation storage 10 through a connecting pipe 11; and flows into the heat exchanger 6 through the duct 7 to be circulated.
Further, the method comprises the following steps:
the temperature of the return pipe 8 at the outlet end of the heat exchanger 6 is controlled to be 200-400 ℃.
The heat conducting medium comprises molten salt;
the temperature of the molten salt in the conveying pipe 7 positioned at the inlet end of the heat exchanger 6 is controlled to be 100-200 ℃.
Wherein the molten salt comprises:
mixtures of different metal nitrates, different metal chlorides, metal oxides or metal nitrates.
An unstable new energy source comprising: the new energy of wind power generation, solar power generation or geothermal power generation.
Specifically, example 1: the schematic diagram of the system configuration scheme of the side cell shell of the aluminum electrolytic cell is shown in fig. 2 and fig. 3, the heat exchanger 6 is only installed on the side cell shell of the aluminum electrolytic cell, when the aluminum electrolytic cell absorbs unstable new energy, the anode current detection module 3 detects the anode current of the electrolytic cell in real time, the detected current signal is transmitted to the flow control module 4, the flow control module 4 adjusts the molten salt flow control valve 5 according to the distribution size of the real-time current, and controls the flow of the molten salt entering the heat exchanger from the conveying pipe 7, so that the heat dissipation of the electrolytic cell is controlled, and the shape of the furnace side is in a relatively stable state. The molten salt heated in the heat exchanger enters the condenser 9 through the return pipe 8, is cooled, flows into the heat-insulating storage 10 through the connecting pipe 11 for storage, and flows into the heat exchanger 6 through the delivery pipe 7 for circulation.
As will be appreciated by one skilled in the art, 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-usable storage media having computer-usable program code embodied therewith, including but not limited to disk storage, CD-ROM, optical storage, and the like.
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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 processor, 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.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (2)
1. A thermal balance adjustment system for absorbing unstable new energy, comprising: the device comprises an aluminum electrolytic cell (1), an anode current detection module (3), a flow control module (4), a flow control valve (5), a heat exchanger (6) and a conveying pipe (7);
the anode current detection module (3) is arranged at the anode of the aluminum electrolytic cell (1) and used for detecting an anode current signal of the aluminum electrolytic cell and transmitting the anode current signal to the flow control module (4);
the flow control module (4) is connected with the anode current detection module (3) and is used for controlling the flow control valve (5);
the flow control valve (5) is arranged on the conveying pipe (7) and used for controlling the flow of the heat-conducting medium;
the conveying pipe (7) is connected with the aluminum electrolytic cell (1) provided with the heat exchanger (6);
the flow control module (4) controls the flow control valve (5) according to the following formula:
in the formula, QRegulating flowM is the flow of the heat exchange medium to be adjusted3/h；QRegulating flowIs the medium flow at the reference current, m3/h；IDetection ofDetecting the actual current magnitude for absorbing new energy A; i isDatumAt a reference currentThe current magnitude, A; eta is a constant and is determined according to the type of new energy consumption, the specific model of the electrolytic cell and the production condition;
further comprising:
a return pipe (8), a condenser (9), a heat preservation storage device (10) and a connecting pipe (11);
the condenser (9) is arranged between the return pipe (8) and the connecting pipe (11);
the heat preservation storage (10) is arranged between the connecting pipe (11) and the conveying pipe (7);
the method comprises the following steps:
the heat exchanger (6) is connected with the delivery pipe (7) and the return pipe (8) through flanges;
the condenser (9) is connected with the return pipe (8) and the connecting pipe (11) through flanges;
the heat preservation storage (10) is connected with the connecting pipe (11) and the conveying pipe (7) through flanges;
the method comprises the following steps:
the temperature of a return pipe (8) positioned at the outlet end of the heat exchanger (6) is controlled to be 200-400 ℃;
the heat conducting medium comprises molten salt;
the temperature of the molten salt in the conveying pipe (7) positioned at the inlet end of the heat exchanger (6) is controlled to be 100-200 ℃;
the molten salt comprises at least one of:
mixtures of different metal nitrates, different metal chlorides, metal oxides or metal nitrates.
2. The method of claim 1 implemented by a thermal balance adjustment system to absorb the new source of unstable energy, comprising:
when the aluminum electrolytic cell (1) consumes unstable new energy, the anode current detection module (3) detects the anode current of the electrolytic cell and transmits a detected current signal to the flow control module (4);
the flow control module (4) adjusts the molten salt flow control valve (5) according to the magnitude of the current signal, and controls a heat-conducting medium entering the heat exchanger (6) from the conveying pipe (7) to enable the heat dissipation of the aluminum electrolytic cell (1) to be balanced;
further comprising:
the heated heat-conducting medium in the heat exchanger (6) enters a condenser (9) through a return pipe (8); after cooling, the mixture flows into a heat preservation storage (10) through a connecting pipe (11); and flows into the heat exchanger (6) through the conveying pipe (7) for circulation;
the method comprises the following steps:
the temperature of a return pipe (8) positioned at the outlet end of the heat exchanger (6) is controlled to be 200-400 ℃;
the heat conducting medium comprises molten salt;
the temperature of the molten salt in the conveying pipe (7) positioned at the inlet end of the heat exchanger (6) is controlled to be 100-200 ℃.
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| CN112210794B (en) * | 2019-07-10 | 2021-12-21 | 郑州轻冶科技股份有限公司 | Aluminum electrolysis energy balance adjusting method and system based on molecular ratio and aluminum electrolysis cell |
| CN212655864U (en) * | 2019-07-10 | 2021-03-05 | 郑州轻冶科技股份有限公司 | Aluminum electrolytic cell capable of realizing superheat degree control |
| CN112210793B (en) * | 2020-10-19 | 2022-06-10 | 郑州轻冶科技股份有限公司 | Aluminum electrolytic cell with heat pipe heat exchanger on side part |
| CN113337850B (en) * | 2021-06-21 | 2024-01-23 | 中国铝业股份有限公司 | Electrolytic tank energy balance control system and method |
| CN113913873B (en) * | 2021-10-12 | 2023-09-05 | 东北大学 | Aluminum electrolysis cell capable of serving as flexible load and heat balance control method thereof |
| CN115029735B (en) * | 2022-05-26 | 2024-01-30 | 中南大学 | Aluminum electrolysis heat balance regulating and controlling device and method for new energy consumption |
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