High-efficiency iron-chromium flow battery electrolyte preparation equipment

Abstract

The invention discloses high-efficiency iron-chromium flow battery electrolyte preparation equipment in the technical field of electrolyte preparation, which comprises a tank body, the bottom of the tank body is fixedly connected with an electro-deposition chamber, the top of the tank body is fixedly connected with a stirring motor, the tank body comprises a reaction kettle and a primary battery layer, and the top wall of the tank body is fixedly connected with the top wall of the reaction kettle. The periphery of the reaction kettle is fixedly connected with the primary battery layer; a magnetized conductive disc is arranged on the bottom wall of the reaction kettle, and the top side wall of the magnetized conductive disc penetrates through the bottom wall of the reaction kettle, extends into the primary battery layer and is fixedly connected with a plurality of reduction electrodes; a plurality of salt bridges are arranged on the side wall of the reaction kettle, the reaction kettle is communicated with the interior of the primary battery layer through the salt bridges, a transfer pipe communicated with the electro-deposition chamber is arranged in the center of the magnetized conductive disc, a transfer valve is arranged on the transfer pipe, and a liquid outlet pipe is communicated with the side wall of the bottom of the electro-deposition chamber. The iron-chromium flow battery electrolyte is novel and practical, through the primary battery layer and the electrodeposition chamber, dissolution and purification of iron-chromium alloy are accelerated, and the production efficiency and quality of the iron-chromium flow battery electrolyte are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrolyte preparation, in particular to a high-efficiency iron-chromium liquid flow battery electrolyte preparation device. Background Art

[0002] Iron-chromium flow battery energy storage technology is known as one of the longest-lasting and safest electrochemical energy storage technologies. 2+ / Fe 3+ Electron pair and Cr 2+ / Cr 3+ Electrolytes are used as positive and negative active materials, usually with hydrochloric acid as the supporting electrolyte. They are highly stable and can realize flexible customization of power and capacity on demand. They also have the advantages of many cycles, long life, small temperature range restrictions, easy access, and low price. As a carrier of the reaction material, the electrolyte of the iron-chromium flow battery is the capacity unit and an important component of the entire energy storage system. The performance of the electrolyte determines the life, stability, and cost of the energy storage system.

[0003] After a long period of research and optimization, the researchers determined that the optimal solution for the electrolyte composition of the iron-chromium flow battery is 1.0 mol / L FeCl2, 1.0 mol / L CrCl3 and 3.0 mol / L HCl. Under this condition, the synergistic effect of the electrolyte's conductivity, electrochemical activity and transport characteristics is optimal. In the preparation process of the iron-chromium flow battery electrolyte, the factors that can affect the dissolution rate of iron and chromium in hydrochloric acid are nothing more than the contact area of ​​the solute solvent, temperature, hydrochloric acid concentration, etc. Current technology and equipment can already make better use of these factors to accelerate the preparation of the electrolyte, but there is still room for optimization. In addition, the method of purifying the electrolyte in the existing preparation process is often the simplest filtration purification. This method has the problem of only removing undissolved impurities and not reducing other dissolved metal impurities. Summary of the invention

[0004] In order to solve the above-mentioned problems that the preparation speed of the iron-chromium liquid flow battery electrolyte needs to be further optimized and the purification process is difficult to remove other dissolved metal impurities, the purpose of the present invention is to provide a high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment, by arranging a primary cell layer and electrodes on the periphery of the reactor to form a primary cell with the iron-chromium alloy to be dissolved, and the design of the electrodeposition chamber, the dissolution and purification of the iron-chromium alloy is further accelerated, thereby improving the production efficiency and quality of the iron-chromium liquid flow battery electrolyte.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: an efficient iron-chromium liquid flow battery electrolyte preparation device, comprising a tank body, the bottom of the tank body is fixedly connected to an electrodeposition chamber, the top of the tank body is fixedly connected to a stirring motor, the tank body comprises a reactor and a primary battery layer, the top wall of the tank body is fixedly connected to the top wall of the reactor, the top wall of the reactor is connected to a feeding pipe and a liquid injection pipe, and the outer periphery of the reactor is fixedly connected to the primary battery layer;

[0006] The output shaft of the stirring motor passes through the top wall of the tank body and extends into the reactor and is rotatably connected to the fixing ring, and a plurality of stirring blades are fixedly connected to the part of the output shaft of the stirring motor located in the reactor;

[0007] The bottom wall of the reactor is provided with a magnetized conductive disk, and the top side wall of the magnetized conductive disk extends through the bottom wall of the reactor into the galvanic cell layer and is fixedly connected with a plurality of reduction electrodes;

[0008] A plurality of salt bridges are arranged on the side wall of the reactor, and the reactor is connected with the interior of the galvanic cell layer through the salt bridges. A transfer pipe is arranged in the center of the magnetized conductive disk to connect with the electrodeposition chamber, and a transfer valve is arranged on the transfer pipe.

[0009] The bottom wall of the electrodeposition chamber is sloped, the side wall of the bottom of the electrodeposition chamber is connected with a liquid outlet pipe, and one side of the bottom wall of the electrodeposition chamber close to the liquid outlet pipe is lower than the other side.

[0010] The principle of the basic scheme is: raw materials such as pure water, hydrochloric acid, and iron-chromium alloy powder are respectively put into the reactor through the feeding pipe and the liquid injection pipe for dissolution, and the stirring motor drives multiple stirring blades to stir the liquid in the reactor, so that the iron-chromium alloy powder is dissolved faster;

[0011] Even the undissolved powder will rotate and accumulate in the center of the bottom of the reactor under the combined action of the high-speed liquid jet and gravity, and contact the magnetic conductive disk with magnetism to form a discrete and moving iron-chromium alloy electrode. Since the reduction electrode in the galvanic layer uses a metal with lower metal activity than iron and chromium, and is connected to the iron-chromium alloy electrode through the magnetized conductive disk, the electrolyte environment of the two electrodes is connected through multiple salt bridges on the reactor wall, forming a galvanic battery system as a whole, in which the iron-chromium alloy powder contacting the magnetized conductive disk is the oxidation electrode;

[0012] At this time, since the iron-chromium alloy is more active, a potential difference is formed with the reduction electrode in the galvanic cell system. The electrons automatically flow from the iron-chromium alloy to the reduction electrode through the magnetized conductive disk. The iron-chromium alloy loses electrons and is accelerated to be oxidized and dissolved in hydrochloric acid. The electrons obtained by the reduction electrode are introduced into the H + and 2H + +e - =The reduction reaction of H2 produces hydrogen;

[0013] The iron-chromium liquid flow battery electrolyte obtained after stirring and dissolving flows into the electrodeposition chamber through the transfer pipe in the center of the magnetized conductive disk for further processing, and is finally collected and stored through the liquid outlet pipe connected to the bottom side wall of the electrodeposition chamber.

[0014] The beneficial effects of the basic scheme are: 1. Based on the basic factors affecting the dissolution of metals in acid, combined with the galvanic cell structure in electrochemistry, an iron-chromium galvanic cell dissolution system was constructed, and the dissolution rate was further accelerated with a simple structural design.

[0015] 2. Dissolving iron-chromium through the principle of galvanic cell does not require the addition of extreme physical factors, and there are very few restrictions on temperature, pressure and raw materials, and no more waste will be incurred to increase the dissolution rate.

[0016] 3. Hydrogen will be produced as a byproduct during the operation of the iron-chromium primary battery dissolution system. Hydrogen can be stored and sold to create economic value, and can also be used in the subsequent electrolyte treatment process, thereby increasing the recovery efficiency of materials and energy used in the iron-chromium primary battery dissolution system, reducing resource waste, and benefiting the ecological environment.

[0017] Furthermore, the liquid outlet pipe is connected to a filter pump, and the filter pump is respectively connected to a liquid storage pipe and a sewage discharge pipe.

[0018] The beneficial effect of the basic scheme is that the iron-chromium flow battery electrolyte dissolved in the reactor and purified in the electrodeposition chamber may still contain solid impurities of iron-chromium alloy or other metals, so when the electrolyte is collected through the liquid outlet pipe, a filter pump is needed to filter the electrolyte to ensure the purity of the electrolyte. The vertical filter pump used here can separate the filtrate and sludge, and the filter holes are not easily blocked.

[0019] Furthermore, the reduction electrodes in the galvanic cell layer are perpendicular to the magnetized conductive disk and arranged in a circular ring shape, and a plurality of reduction electrode rings are fixedly connected to the middle and top of the reduction electrode. The metal constituting the reduction electrode and the reduction electrode ring has a lower metal activity than iron and chromium.

[0020] The beneficial effect of the basic scheme is that when the iron-chromium galvanic cell dissolution system is working, the reduction electrode and the connected reduction electrode ring are all immersed in the reduction electrolyte. The setting of the reduction electrode ring greatly increases the contact area between the reduction electrode and the reduction electrolyte, which means that the electron exchange efficiency between the reduction electrode and the reduction electrolyte is increased, the working efficiency of the galvanic cell is enhanced, and the foundation is laid for improving the iron-chromium dissolution scale of the entire system.

[0021] Furthermore, the magnetized conductive disk is subjected to a magnetization treatment.

[0022] The beneficial effect of the basic scheme is that discrete and moving iron-chromium alloy powder needs to collide with the magnetized conductive disk to become a component of the oxidation electrode and the galvanic cell layer to form a galvanic cell. The whole process is random, and the magnetized conductive disk has magnetic properties, which can increase the contact efficiency with iron and also have a positive effect on the contact with chromium. This design improves the stability of the entire iron-chromium galvanic cell dissolution system and ensures the working efficiency of the galvanic cell system.

[0023] Furthermore, electrode grooves are fixedly connected to both side walls of the electrodeposition chamber, and cables penetrating the side walls of the electrodeposition chamber are fixedly connected to the outer sides of the electrode grooves. The cables are electrically connected to batteries and voltage controllers, and the batteries and voltage controllers are electrically connected.

[0024] The beneficial effects of the basic scheme are as follows: the iron-chromium liquid flow battery electrolyte obtained after the dissolution of iron-chromium enters the electrodeposition chamber through a transfer pipe for purification treatment, and the electrolyte is bidirectionally charged and discharged according to the electrodeposition principle of metal ions and the equilibrium potential of the corresponding metal impurities through the electrode slots designed on both sides of the electrodeposition chamber and the power supply and control components connected to them. In this process, the corresponding metal impurities will be precipitated from the electrolyte and condensed on the electrode slots on both sides. The dissolved metal impurities are purified by the chemical method of electrodeposition, which makes up for the lack of chemical purification treatment process of the iron-chromium liquid flow battery electrolyte and improves the quality of the prepared iron-chromium liquid flow battery electrolyte.

[0025] Furthermore, the electrode groove is in a semicircular arc shape, and a plurality of electrode sheets perpendicular to the electrode groove are arranged on the electrode groove.

[0026] The beneficial effects of the basic scheme are: the electrode trough and the multi-layer electrode sheets fixedly connected thereto greatly increase the contact area between the electrolyte and the electrode during the electrodeposition process, ensuring the efficiency and quality of the iron-chromium liquid flow battery electrolyte purification.

[0027] Furthermore, the tank body also includes a hydrogen collection layer, the inner periphery of the hydrogen collection layer is fixedly connected to the outer wall of the primary battery layer, and the top of the primary battery layer is fixedly connected to a plurality of hydrogen collection gas pumps connected to the hydrogen collection layer.

[0028] The beneficial effects of the basic scheme are as follows: a hydrogen collection layer is provided outside the primary battery layer, and during the operation of the iron-chromium primary battery dissolution system, a reduction reaction occurs around the reduction electrode and the reduction electrode ring of the primary battery layer and hydrogen is produced, and the hydrogen is separated from the reduction electrolyte of the primary battery layer and gathered in the top space of the primary battery layer, and the hydrogen collection pump can pump the hydrogen on the top of the primary battery layer into the hydrogen collection layer for enrichment and short-term storage for subsequent iron-chromium liquid flow battery electrolyte treatment; based on such a multi-layer design, not only can the primary battery principle be used to accelerate the oxidation and dissolution of iron-chromium, but the reduced product hydrogen produced will not be wasted, thereby increasing the energy consumed in the preparation of the iron-chromium liquid flow battery electrolyte and material recovery, and improving the economic benefits of the entire preparation equipment.

[0029] Furthermore, the outer wall of the bottom of the hydrogen collection layer is connected to several hydrogen delivery pipes, which extend from the inner outer wall of the hydrogen collection layer to the top of the hydrogen collection layer. The other end of the hydrogen delivery pipe is connected to a three-way air pump, and one end of the three-way air pump is connected to a hydrogenation pipe, which is connected to the top of the side wall of the electrodeposition chamber.

[0030] The beneficial effect of the basic scheme is that the hydrogen that is temporarily stored and enriched in the hydrogen collection layer can be pumped into the electrodeposition chamber by a three-way gas pump through a hydrogen transfer pipe, and play a role in the electrodeposition purification process of the iron-chromium liquid flow battery electrolyte. This is because the iron-chromium dissolution process in the preparation of the iron-chromium liquid flow battery electrolyte and the redox reaction that occurs in the subsequent electrodeposition purification process can easily reduce the hydrogen ions dissolved in the electrolyte and form hydrogen to "evolve hydrogen". Therefore, hydrogen is introduced and enriched in the electrodeposition chamber to inhibit the occurrence of hydrogen evolution, and it is possible to further "dissolve hydrogen" in the iron-chromium liquid flow battery electrolyte, which is beneficial to improving the quality of the electrolyte and increasing the capacity limit and cycle life of the iron-chromium liquid flow battery electrolyte when it is subsequently used in the iron-chromium liquid flow battery.

[0031] Furthermore, the third end of the three-way air pump is connected to a hydrogen storage pipe, and the hydrogen storage pipe is connected to a hydrogen storage tank.

[0032] The beneficial effect of the basic scheme is that after the electrolyte is purified, the excess hydrogen can be pumped into the hydrogen storage tube through a three-way air pump and then stored in the hydrogen storage tank. The stored hydrogen can be used for the turnover of the iron-chromium liquid flow battery electrolyte preparation equipment, or it can be used as a by-product to create economic value. This design further expands the production function of the iron-chromium liquid flow battery electrolyte preparation equipment, improves resource utilization efficiency, and promotes the green and environmental protection progress of chemical production equipment.

[0033] Furthermore, an eddy current coil is wound around the output shaft of the stirring motor and extends to the bottom of the output shaft.

[0034] The beneficial effects of the basic scheme are: the eddy current coil wound on the output shaft can directly heat and keep the iron powder warm by energizing and rotating according to the eddy current effect, thereby ensuring the dissolution efficiency of iron chromium in hydrochloric acid, and can help reduce the use and power consumption of other heating equipment, further promoting the improvement of the energy utilization efficiency of the entire iron-chromium liquid flow battery electrolyte preparation equipment and saving electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is an axonometric view of an efficient iron-chromium liquid flow battery electrolyte preparation device in an embodiment of the present invention.

[0036] Figure 2 It is a front cross-sectional view of a high-efficiency iron-chromium liquid flow battery electrolyte preparation device in an embodiment of the present invention.

[0037] Figure 3This is a top cross-sectional view of the interior of a tank body of a high-efficiency iron-chromium liquid flow battery electrolyte preparation device in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following is further described in detail through specific implementation methods:

[0039] The figure marks in the drawings of the specification include: tank body 1, reactor 2, primary battery layer 3, hydrogen collection layer 4, stirring motor 5, feeding pipe 6, injection pipe 7, fixing ring 8, stirring fan blade 9, magnetized conductive disk 10, conversion tube 11, transfer valve 12, reduction electrode 13, reduction electrode ring 14, salt bridge 15, three-way air pump 16, hydrogenation pipe 17, hydrogen collection pump 18, hydrogen transmission pipe 19, hydrogen storage pipe 20, electrodeposition chamber 21, electrode slot 22, electrode sheet 23, cable 24, battery 25, voltage controller 26, liquid outlet pipe 27, filter pump 28, sewage pipe 29, liquid storage pipe 30, eddy current coil 31.

[0040] Example 1

[0041] Basically as attached Figure 1-Figure 3 As shown: a high-efficiency iron-chromium liquid flow battery electrolyte preparation device, including a tank body 1, the bottom of the tank body 1 is fixedly connected to an electrodeposition chamber 21, the top of the tank body 1 is fixedly connected to a stirring motor 5, the tank body 1 includes a reactor 2 and a primary battery layer 3, the top wall of the tank body 1 is fixedly connected to the top wall of the reactor 2, the top wall of the reactor 2 is connected to a feeding pipe 6 and a liquid injection pipe 7, and the periphery of the reactor 2 is fixedly connected to the primary battery layer 3;

[0042] The output shaft of the stirring motor 5 passes through the top wall of the tank body 1 and extends into the reactor 2 and is rotatably connected to the fixing ring 8. The output shaft of the stirring motor 5 located in the reactor 2 is fixedly connected to a plurality of stirring blades 9. The output shaft of the stirring motor 5 is wound with an eddy current coil 31 and extends to the bottom end of the output shaft.

[0043] The bottom wall of the reactor 2 is provided with a magnetized conductive disk 10. The magnetized conductive disk 10 is subjected to magnetization treatment. The top side wall of the magnetized conductive disk 10 passes through the bottom wall of the reactor 2 and extends into the galvanic cell layer 3 and is fixedly connected with a plurality of reduction electrodes 13. The reduction electrodes 13 are perpendicular to the magnetized conductive disk 10 and are arranged in a circular ring shape. The middle and top of the reduction electrode 13 are fixedly connected with a plurality of reduction electrode rings 14. The metal constituting the reduction electrode and the reduction electrode ring has a metal activity lower than that of iron and chromium. The side wall of the reactor 2 is provided with a plurality of salt bridges 15. The reactor 2 is connected with the inside of the galvanic cell layer 3 through the salt bridges 15. A transfer pipe is provided in the center of the magnetized conductive disk 10 to connect with the electrodeposition chamber 21. A transfer valve 12 is provided on the transfer pipe.

[0044] The bottom wall of the electrodeposition chamber 21 is sloped, and the bottom side wall of the electrodeposition chamber 21 is connected to a liquid outlet pipe 27. The side of the bottom wall of the electrodeposition chamber 21 close to the liquid outlet pipe 27 is lower than the other side. The liquid outlet pipe 27 is connected to a filter pump 28, and the filter pump 28 is respectively connected to a liquid storage pipe 30 and a sewage pipe 29; electrode grooves 22 are fixedly connected to both side walls of the electrodeposition chamber 21, and the electrode grooves 22 are semicircular. A plurality of electrode sheets 23 perpendicular to the electrode grooves 22 are provided on the electrode grooves 22. Cables 24 that penetrate the side walls of the electrodeposition chamber 21 are fixedly connected to the outside of the electrode grooves 22, and the cables 24 are electrically connected to a battery 25 and a voltage controller 26, and the battery 25 and the voltage controller 26 are electrically connected.

[0045] The specific implementation process is as follows: raw materials such as pure water, hydrochloric acid, and iron-chromium alloy powder are respectively fed into the reactor 2 through the feeding pipe 6 and the injection pipe 7 for dissolution, the stirring motor 5 drives a plurality of stirring blades 9 to stir the liquid in the reactor 2, and the eddy current coil 31 on the output shaft of the stirring motor 5 is energized to heat and keep the reactor 2 warm by utilizing the turbine effect, so that the iron-chromium alloy powder is accelerated to dissolve;

[0046] The undissolved powder will rotate and accumulate in the center of the bottom of the reactor 2 due to the combined effect of the high-speed liquid jet brought by the stirring and the gravity, and will randomly contact the magnetized conductive disk 10 to form a discrete and moving iron-chromium alloy electrode. The magnetic conductive disk 10 can increase the contact efficiency between the iron-chromium alloy powder and the conductive disk, improve the stability of the iron-chromium alloy electrode, and lay the foundation for the subsequent formation of the primary battery system. Since the reduction electrode 13 in the primary battery layer 3 uses a metal with lower metal activity than iron and chromium, and is connected to the iron-chromium alloy electrode through the magnetized conductive disk 10, the electrolyte environment of the two electrodes is connected through multiple salt bridges 15 on the wall of the reactor 2, forming a primary battery system, in which the iron-chromium alloy powder contacting the magnetized conductive disk 10 is the oxidation electrode;

[0047] At this time, since the iron-chromium alloy is more active, a potential difference is formed with the reduction electrode 13 in the primary battery system. The electrons from the iron-chromium alloy automatically flow through the magnetized conductive disk 10 into the reduction electrode 13 and the reduction electrode ring 14. The iron-chromium alloy loses electrons and is accelerated to be oxidized and dissolved in the hydrochloric acid. The electrons obtained by the reduction electrode 13 are introduced into the H of the reduction electrolyte. + and 2H + +e - =H2 reduction reaction produces hydrogen, so the original battery system that accelerates the dissolution of iron-chromium alloy powder does not need to add extreme physical factors, the equipment restrictions are small, and the by-product hydrogen produced can be recycled or stored to create economic value;

[0048] The iron-chromium flow battery electrolyte obtained after stirring and dissolving flows into the electrodeposition chamber 21 through the transfer pipe in the center of the magnetized conductive disk 10 for purification treatment. The electrolyte is bidirectionally charged and discharged according to the electrodeposition principle of metal ions and the equilibrium potential of the corresponding metal impurities through the electrode slots 22 designed on both sides of the electrodeposition chamber 21 and the power supply and control components connected thereto. In this process, the corresponding metal impurities will be precipitated from the electrolyte and condensed on the electrode slots 22 on both sides. The electrode slots 22 and the plurality of electrode sheets 23 fixedly connected thereto greatly increase the contact area between the electrolyte and the electrode during the electrodeposition process, thereby ensuring the efficiency and quality of the iron-chromium flow battery electrolyte purification. The dissolved metal impurities are purified by the chemical method of electrodeposition, thereby completing the deficiency of the chemical purification process of the iron-chromium flow battery electrolyte and improving the quality of the prepared iron-chromium flow battery electrolyte.

[0049] The iron-chromium flow battery electrolyte dissolved in the reactor 2 and purified by the electrodeposition chamber 21 may still contain solid impurities of iron-chromium alloy or other metals. Therefore, when collecting the electrolyte through the liquid outlet pipe 27 connected to the bottom side wall of the electrodeposition chamber 21, it is necessary to use a filter pump 28 to filter the electrolyte to ensure the purity of the electrolyte. The vertical filter pump 28 used here can separate the filtrate and sludge, and the filter holes are not easily blocked. Finally, the finished iron-chromium flow battery electrolyte flows into the liquid storage tank through the liquid storage pipe 30 for storage.

[0050] Example 2

[0051] The difference from the above embodiment is that the tank body 1 also includes a hydrogen collection layer 4, the inner periphery of the hydrogen collection layer 4 is fixedly connected to the outer wall of the original battery layer 3, the top of the original battery layer 3 is fixedly connected to a plurality of hydrogen collection gas pumps connected to the hydrogen collection layer 4, the outer side wall of the bottom of the hydrogen collection layer 4 is connected to a plurality of hydrogen transmission pipes 19, the hydrogen transmission pipes 19 extend from the inner outer wall of the hydrogen collection layer 4 to the top of the hydrogen collection layer 4, the other end of the hydrogen transmission pipe 19 is connected to a three-way air pump 16, one end of the three-way air pump 16 is connected to a hydrogenation pipe 17, the hydrogenation pipe 17 is connected to the top of the side wall of the electrodeposition chamber 21, the third end of the three-way air pump 16 is connected to a hydrogen storage pipe 20, and the hydrogen storage pipe 20 is connected to a hydrogen storage tank.

[0052] The specific implementation process is as follows: a hydrogen collection layer 4 is also sheathed outside the primary battery layer 3. During the operation of the iron-chromium primary battery dissolution system, a reduction reaction occurs around the reduction electrode 13 and the reduction electrode ring 14 of the primary battery layer 3 and hydrogen is generated. The hydrogen is separated from the reduction electrolyte of the primary battery layer 3 and gathered in the top space of the primary battery layer 3. The hydrogen collection pump can pump the hydrogen at the top of the primary battery layer 3 into the hydrogen collection layer 4 for enrichment and short-term storage; the hydrogen enriched in the hydrogen collection layer 4 is pumped to the electrodeposition chamber 21 by the three-way air pump 16 through the hydrogen delivery pipe 19, and is purified by the electrodeposition of the iron-chromium liquid flow battery electrolyte. The oxidation-reduction reaction in the iron-chromium dissolution process and the subsequent electroplating purification process of the iron-chromium flow battery electrolyte can easily reduce the hydrogen ions dissolved in the iron-chromium flow battery electrolyte and form hydrogen gas to "emit hydrogen". Therefore, hydrogen gas is introduced into the electroplating chamber 21 and enriched to inhibit the occurrence of hydrogen evolution, and it is possible to further "dissolve hydrogen" in the iron-chromium flow battery electrolyte, which is beneficial to improve the quality of the electrolyte and increase the capacity limit and cycle life of the iron-chromium flow battery electrolyte when it is subsequently used in the iron-chromium flow battery.

[0053] After the electrolyte is purified, excess hydrogen can be pumped into the hydrogen storage pipe 20 through the three-way air pump 16 and stored in the hydrogen storage tank. The stored hydrogen can be used for the turnover of the iron-chromium liquid flow battery electrolyte preparation equipment, or it can be used as a by-product to create economic value. This design further expands the production function of the iron-chromium liquid flow battery electrolyte preparation equipment, improves resource utilization efficiency, and promotes the green and environmental protection progress of chemical production equipment.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A high-efficiency iron-chromium liquid flow battery electrolyte preparation device, characterized in that: It comprises a tank body, the bottom of the tank body is fixedly connected with an electrodeposition chamber, the top of the tank body is fixedly connected with a stirring motor, the tank body comprises a reactor and a primary battery layer, the top wall of the tank body is fixedly connected with the top wall of the reactor, the top wall of the reactor is connected with a feeding pipe and a liquid injection pipe, and the periphery of the reactor is fixedly connected with the primary battery layer; The output shaft of the stirring motor passes through the top wall of the tank body and extends into the reactor and is rotatably connected to the fixing ring, and a plurality of stirring blades are fixedly connected to the part of the output shaft of the stirring motor located in the reactor; The bottom wall of the reactor is provided with a magnetized conductive disk, and the top side wall of the magnetized conductive disk extends through the bottom wall of the reactor into the galvanic cell layer and is fixedly connected with a plurality of reduction electrodes; A plurality of salt bridges are arranged on the side wall of the reactor, and the reactor is connected with the interior of the galvanic cell layer through the salt bridges. A transfer pipe is arranged in the center of the magnetized conductive disk to connect with the electrodeposition chamber, and a transfer valve is arranged on the transfer pipe. The bottom wall of the electrodeposition chamber is sloped, the side wall of the bottom of the electrodeposition chamber is connected with a liquid outlet pipe, and one side of the bottom wall of the electrodeposition chamber close to the liquid outlet pipe is lower than the other side.

2. The high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment according to claim 1 is characterized in that: The liquid outlet pipe is connected with a filter pump, and the filter pump is respectively connected with a liquid storage pipe and a sewage discharge pipe.

3. The high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment according to claim 2, characterized in that: The reduction electrodes in the galvanic cell layer are perpendicular to the magnetized conductive disk and arranged in a circular ring shape. The middle and top of the reduction electrode are fixedly connected with a number of reduction electrode rings. The metal constituting the reduction electrode and the reduction electrode ring is less active than iron and chromium.

4. The high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment according to claim 3 is characterized in that: The magnetized conductive disk is magnetized.

5. The high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment according to claim 4, characterized in that: Electrode grooves are fixedly connected to both side walls of the electrodeposition chamber, and cables penetrating the side walls of the electrodeposition chamber are fixedly connected to the outer sides of the electrode grooves. The cables are electrically connected to batteries and voltage controllers, and the batteries and voltage controllers are electrically connected.

6. The high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment according to claim 5, characterized in that: The electrode groove is semicircular in shape, and a plurality of electrode sheets perpendicular to the electrode groove are arranged on the electrode groove.

7. The high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment according to claim 6, characterized in that: The tank body also includes a hydrogen collection layer, the inner periphery of the hydrogen collection layer is fixedly connected to the outer wall of the primary battery layer, and the top of the primary battery layer is fixedly connected to a plurality of hydrogen collection gas pumps connected to the hydrogen collection layer.

8. The high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment according to claim 7, characterized in that: The outer wall at the bottom of the hydrogen collection layer is connected to several hydrogen delivery pipes, which extend from the inner outer wall of the hydrogen collection layer to the top of the hydrogen collection layer. The other end of the hydrogen delivery pipe is connected to a three-way air pump, and one end of the three-way air pump is connected to a hydrogenation pipe, which is connected to the top of the side wall of the electrodeposition chamber.

9. The high-efficiency iron-chromium liquid flow battery electrolyte preparation equipment according to claim 8, characterized in that: The third end of the three-way air pump is connected with a hydrogen storage pipe, and the hydrogen storage pipe is connected with a hydrogen storage tank.

10. The high-efficiency iron-chromium liquid flow battery electrolyte preparation device according to claim 9, characterized in that: An eddy current coil is wound around the output shaft of the stirring motor and extends to the bottom of the output shaft.

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