CN-122000400-A - Novel vanadium redox battery electrolyte serialization production line

CN122000400ACN 122000400 ACN122000400 ACN 122000400ACN-122000400-A

Abstract

The utility model provides a novel vanadium redox battery electrolyte serialization production line, includes electrochemical reaction device, anodal liquid storage pot, negative pole liquid storage pot, reductant preparation reinforced tank group, reductant temporary storage pot, reaction liquid storage pot, solution preparation reinforced tank group, adjusts liquid storage pot, solution regulation reinforced tank group, finished product liquid storage pot and finished product filling weighing device. The method is based on a technical route of preparing the electrolyte by a reduction method, raw materials can be high-purity V 2 O 5 powder, high-purity NH 4 VO 3 powder, VO 2 SO 4 crystals and the like, and can also be vanadium electrolyte solution with a valence higher than 3.5, and the method has the characteristics of high raw material adaptability and wide application range, the reducing agent of the production line is only low-valence vanadium electrolyte, no other elements are introduced, the purity of the vanadium electrolyte is ensured, the reducing agent is produced by the production line, no additional supplement is needed except for adding the reducing agent at the initial starting stage, and the production line has the characteristics of high production speed, good production stability, stable product quality, continuous production, easiness in operation and labor and material conservation.

Inventors

WU XIAOLIANG
HOU SHAOYU
LIU JIANGUO

Assignees

中国科学院金属研究所

Dates

Publication Date: 20260508
Application Date: 20260324

Claims (10)

1. A novel vanadium battery electrolyte continuous production line is characterized by comprising a reducing agent preparation area, a reducing agent temporary storage area, a solution preparation area, a solution regulation area and a finished product filling area, wherein an electrochemical reaction device, an anode liquid storage tank, a cathode liquid storage tank and a reducing agent preparation charging tank group are arranged in the reducing agent preparation area, a reducing agent temporary storage tank is arranged in the reducing agent temporary storage area, a reaction liquid storage tank and a solution preparation charging tank group are arranged in the solution preparation area, a regulation liquid storage tank and a solution regulation charging tank group are arranged in the solution regulation area, a finished product liquid storage tank and a finished product filling weighing device are arranged in the finished product filling area, the anode liquid storage tank is connected with the anode of the electrochemical reaction device through a circulation pipeline, the cathode liquid storage tank is connected with the cathode of the electrochemical reaction device through a circulation pipeline, liquid inlets of the anode liquid storage tank and the cathode liquid storage tank are connected with a reducing agent preparation charging tank group through pipelines, liquid outlets of the cathode liquid storage tanks are communicated with liquid inlets of the reducing agent temporary storage tanks through pipelines, liquid outlets of the reducing agent temporary storage tanks are output through two paths, a liquid storage tank is communicated with the reaction liquid inlets of the regulation liquid storage tank and the other liquid storage tank through the regulation liquid inlets, the other liquid inlets are communicated with the reaction liquid inlets through the regulation liquid inlets of the two liquid inlets of the regulation liquid storage tank through the other liquid inlets, the liquid outlet of the liquid storage tank is adjusted to be communicated with the liquid inlet of the finished product liquid storage tank through a pipeline, and the liquid outlet of the finished product liquid storage tank is connected with a finished product filling weighing device.
2. The novel vanadium redox battery electrolyte continuous production line according to claim 1, wherein the novel vanadium redox battery electrolyte continuous production line adopts a PLC automatic control system.
3. The novel vanadium redox battery electrolyte continuous production line is characterized in that the electrochemical reaction device adopts an electrolytic pile powered by a direct current power supply, the finished product filling and weighing device adopts a bucket structure or a tank structure, when the finished product filling and weighing device is of a tank structure, the finished product filling and weighing device adopts a steel lining type storage tank structure or a glass fiber reinforced plastic winding type storage tank structure, and the weighing mode of the finished product filling and weighing device comprises a weight mode and a volume mode.
4. The novel vanadium redox battery electrolyte continuous production line according to claim 1 is characterized by further comprising a gas recovery area, wherein a gas recovery device is arranged in the gas recovery area, exhaust ports of the positive electrode liquid storage tank, the negative electrode liquid storage tank, the reducing agent temporary storage tank, the reaction liquid storage tank and the adjustment liquid storage tank are all communicated with the gas recovery device through pipelines, and exhaust modes adopted by the positive electrode liquid storage tank, the negative electrode liquid storage tank, the reducing agent temporary storage tank, the reaction liquid storage tank and the adjustment liquid storage tank are natural exhaust modes or low-pressure air exhaust modes.
5. The novel vanadium redox battery electrolyte continuous production line according to claim 1 is characterized in that a cooling device is arranged in a matched mode for the positive electrode liquid storage tank, the negative electrode liquid storage tank, the reducing agent temporary storage tank, the reaction liquid storage tank and the adjustment liquid storage tank, and the cooling device adopts a water cooling heat exchanger or an air cooling heat exchanger.
6. The novel vanadium redox battery electrolyte continuous production line according to claim 1, wherein a liquid pump, a filter, a control valve and a detection instrument are arranged on a circulation pipeline between the positive electrode liquid storage tank and the positive electrode of the electrochemical reaction device, a circulation pipeline between the negative electrode liquid storage tank and the negative electrode of the electrochemical reaction device, a pipeline between a liquid outlet of the negative electrode liquid storage tank and a liquid inlet of a reducing agent temporary storage tank, a pipeline between a liquid outlet of the reducing agent temporary storage tank and a liquid inlet of a reaction liquid storage tank, a pipeline between a liquid outlet of the reaction liquid storage tank and a liquid inlet of an adjustment liquid storage tank, a pipeline between a liquid outlet of the adjustment liquid storage tank and a liquid inlet of a finished product liquid storage tank, and a pipeline between a liquid outlet of the finished product liquid storage tank and a finished product filling weighing device, wherein the liquid pump adopts a magnetic pump, the filter adopts a single-stage filter or a multi-stage filter, and the detection instrument comprises a flowmeter, a thermometer and a pressure gauge.
7. The novel vanadium redox battery electrolyte continuous production line is characterized in that stirring devices and liquid level sensors are arranged on a positive liquid storage tank, a negative liquid storage tank, a reducing agent temporary storage tank, a reaction liquid storage tank, an adjustment liquid storage tank and a finished product liquid storage tank in a matched mode, the stirring devices are motor-driven blade type stirring machines, and the liquid level sensors are contact type liquid level sensors or non-contact type liquid level sensors.
8. The novel vanadium redox battery electrolyte continuous production line of claim 1, wherein the positive electrode liquid storage tank, the negative electrode liquid storage tank, the reducing agent temporary storage tank, the reaction liquid storage tank, the adjustment liquid storage tank and the finished product liquid storage tank all adopt steel lining type storage tank structures or glass fiber reinforced plastic winding type storage tank structures, waste discharge ports are formed in the bottom of the tank body, and a corrosion-resistant layer is arranged on the surface of the inner wall of the tank body.
9. The novel vanadium redox battery electrolyte continuous production line is characterized in that a valence state monitoring device is arranged on each of the negative electrode liquid storage tank and the adjusting liquid storage tank in a matched mode, the valence state monitoring device comprises a potentiometric titration measuring system and a spectrophotometry measuring system, a concentration monitoring device is arranged on the adjusting liquid storage tank in a matched mode, a heating device is arranged on the reaction liquid storage tank in a matched mode, and the heating device is an in-tank electric heating wire device or an out-tank electric heating sleeve device.
10. The novel vanadium redox battery electrolyte continuous production line of claim 1, wherein the solution preparation charging tank group comprises a solid charging tank and a liquid charging tank, a charging port of the reaction liquid storage tank is communicated with discharging ports of the solid charging tank and the liquid charging tank, and a reaction mode in the reaction liquid storage tank is solid-liquid reaction or liquid-liquid reaction.

Description

Novel vanadium redox battery electrolyte serialization production line Technical Field The invention belongs to the technical field of energy storage flow battery electrolyte production, and particularly relates to a novel vanadium redox battery electrolyte continuous production line. Background The energy storage of the all-vanadium redox flow battery has the characteristics of intrinsic safety, long charge and discharge cycle life, recyclable electrolyte, good life cycle economy, environmental friendliness and the like, and is considered as one of the best choices of high-power, large-capacity and long-time energy storage technology in the industry. The electrolyte is a core component of the vanadium battery and is also an energy storage carrier of the vanadium battery. At present, the production mode of the vanadium battery electrolyte mainly comprises the following steps: ① . In the process of preparing the vanadium battery electrolyte by the reduction method, vanadium pentoxide (V 2O5) or ammonium metavanadate (NH 4VO3) is generally used as a raw material, and due to poor solubility of the vanadium pentoxide and the ammonium metavanadate in sulfuric acid solution, the solution and the electrolyte preparation of vanadium ions are realized by adding a reducing agent (such as oxalic acid, ethanol, tartaric acid, formic acid, acetic acid and other inorganic reagents or H 2S、SO2、H2, CO and other inorganic gases) and carrying out heat treatment. The electrolyte prepared by the process is in a 4-valence state generally, and the prepared electrolyte is required to be reduced to 3.5-valence state by an electrolysis cell stack. Although the technology for preparing the vanadium battery electrolyte by the process is mature, the added reducing agent is easy to form residues, and the quality of the finished electrolyte is further affected. ② . In an electrolytic tank, vanadium pentoxide (V 2O5) or ammonium metavanadate (NH 4VO3) and sulfuric acid suspension are taken as a negative electrode reaction solution, sulfuric acid solution is taken as a positive electrode reaction solution, direct current is introduced, so that vanadium ions are subjected to oxidation-reduction reaction on the surface of an electrode, and the negative electrode is electrolyzed to obtain the 3.5-valence vanadium electrolyte. However, the method has the defects of large electrolytic side reaction, low electrolytic efficiency and high energy consumption. ③ . The extraction method is to prepare the electrolyte by utilizing vanadium-containing solution and preparing the vanadium electrolyte in a short process. Adding a specific extractant into the vanadium-containing solution to enable vanadium ions to be selectively transferred into an extraction phase, transferring the vanadium ions into a stripping solution through operations such as stripping, further processing to obtain a vanadium electrolyte, and then obtaining the 3.5-valence vanadium electrolyte through electrolysis. However, the vanadium concentration in the vanadium-containing solution in this method is low and contains a large amount of metal impurities such as iron, manganese, aluminum, copper, calcium, potassium, etc., nonmetallic impurities such as silicon, etc., are difficult to completely remove, and the residue of the extractant during extraction and back extraction is unavoidable. Disclosure of Invention Aiming at the problems existing in the prior art, the invention provides a novel continuous production line of vanadium battery electrolyte, which is based on a technical route of preparing the electrolyte by a reduction method, and the production line has the characteristics of high production speed, good production stability, stable product quality, continuous production, easy operation and manpower and material resource conservation, and can be used for preparing high-purity V 2O5 powder, high-purity NH 4VO3 powder, VO 2SO4 crystal and the like, and also can be used for preparing vanadium electrolyte solution with a valence state higher than 3.5. In order to achieve the aim, the invention adopts the following technical scheme that the novel vanadium battery electrolyte continuous production line comprises a reducing agent preparation area, a reducing agent temporary storage area, a solution preparation area, a solution regulation area and a finished product filling area, wherein an electrochemical reaction device, an anode liquid storage tank, a cathode liquid storage tank and a reducing agent preparation charging tank group are arranged in the reducing agent preparation area, a reducing agent temporary storage tank is arranged in the reducing agent temporary storage area, a reaction liquid storage tank and a solution preparation charging tank group are arranged in the solution preparation area, a regulating liquid storage tank and a solution regulation charging tank group are arranged in the solution regulation area, a finished product liquid storage tank and a finished p