Steel lining plastic storage tank for flow battery

Abstract

The utility model belongs to the field of battery storage tanks, and discloses a steel lining plastic storage tank for a flow battery, which comprises a tank body, a liquid outlet flange and a liquid return flange are arranged on the tank body, the steel lining plastic storage tank further comprises a container, the tank body is arranged in the container, a plurality of supporting pieces are arranged between the tank body and a frame of the container, and an electrical bin is arranged between the container and the tank body. The tank body is arranged in the container, stable support is provided between the container and the tank body through a plurality of supporting pieces, and the stability and the safety of the whole structure are enhanced. And the electrical bin is arranged between the container and the tank body, so that centralized management of electrical equipment is realized, the complexity of electrical connection is reduced, and the safety of the system is improved. Due to the design of the container, the transportation and installation processes are simplified, additional protection and heat preservation functions are provided, and the cost and maintenance difficulty of the system are further reduced. The overall design optimizes the installation, operation and maintenance of the storage tank, and improves the reliability and use efficiency of the system.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery storage tanks, and in particular relates to a steel-lined plastic storage tank for a liquid flow battery. Background Art

[0002] In recent years, with the rapid growth of large-scale energy storage demand, lithium batteries and lead-acid batteries, as the most mature energy storage technologies, still have many limitations, and these limitations are difficult to overcome in a short period of time. Therefore, flow batteries have gradually become a development hotspot. Among them, the development of all-vanadium flow batteries, zinc-bromine flow batteries, and iron-chromium flow batteries is relatively mature. However, the biggest obstacle to the increase in the proportion of flow batteries in new installations is its high installation cost. Only by solving the installation cost problem can flow batteries continue to rise in proportion.

[0003] Steel-lined plastic storage tanks are one of the steel-plastic composite series products, using a special rotational molding process. The specific process is to weld the steel mesh to the surface of the steel body, use pure polyethylene (linear low-density polyethylene LLDPE or high-density polyethylene HDPE) as raw materials, and organically combine the steel plate, steel mesh (tortoise shell) and polyethylene into one through the rotational molding process. This process can overcome many problems in the manufacturing and use of traditional storage tanks, and provide a new solution for flow battery storage tanks.

[0004] In the all-vanadium liquid flow battery system, the electrolyte prefabricated cabin usually adopts the method of container plus welded square tank in the early stage. As the project installation cost gradually decreases, open mold square tank has become the mainstream form of cost reduction and efficiency improvement. However, the manufacturing cycle of welded square tank is long and expensive, and the large number of welds increases the risk of cracking and leakage during transportation and assembly. The open mold square tank has a long mold opening cycle and high mold cost. In addition, when the design changes in the later stage, the mold needs to be repaired or re-molded. During this period, the mold cannot be used for production, which has great restrictions and uncertainties. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the above background technology and provide a steel-lined plastic storage tank for a liquid flow battery, which can improve stability, maintenance convenience and system safety and reduce costs.

[0006] In order to solve the above technical problems, the technical solution proposed by the utility model is:

[0007] A steel-lined plastic storage tank for a liquid flow battery comprises a tank body, on which a liquid outlet flange and a liquid return flange are provided, and also comprises a container, wherein the tank body is placed in the container, a plurality of supporting members are provided between the tank body and a frame of the container, and an electrical compartment is provided between the container and the tank body.

[0008] As a further improvement of the above technical solution:

[0009] An isolation plate is provided on one side of the electrical compartment close to the tank body.

[0010] The container is provided with a hatch, the electrical compartment is located between the hatch and the isolation plate, and the hatch is communicated with the electrical compartment.

[0011] The tank body is provided with a multi-interface flange and a manhole flange, and the container is provided with an inspection port, which corresponds to the multi-interface flange and the manhole flange in upper and lower directions.

[0012] The surface of the tank body is wound with a heating belt, and the inner wall of the container is covered with a rock wool purification board.

[0013] The frame is provided with a plurality of suspension rods, and each of the suspension rods is movably connected to the frame.

[0014] The support member comprises a support foot and a connecting rod.

[0015] The support legs are connected between the side of the tank body and the frame, and the support legs extend in a direction perpendicular to the length of the container.

[0016] An arc plate is provided at one end of the supporting foot close to the tank body, and the arc plate is provided with an arc surface that fits the tank body.

[0017] The connecting rod is connected between the end of the tank body and the frame, and an acute angle is formed between the connecting rod and the frame.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The tank body is placed in a container, and a stable structure is formed between the tank body and the frame of the container through multiple supporting parts, which increases the structural strength and service life of the storage tank.

[0020] The use of steel-lined plastic materials improves the corrosion resistance of storage tanks, meets the requirements of acid and alkali corrosion resistance, reduces the cost of purchasing containers and the assembly process of storage tanks and containers, and significantly reduces production and assembly costs.

[0021] An electrical compartment is set between the container and the tank, which enables centralized management of electrical equipment, reduces the complexity of electrical connections, and improves the safety and reliability of the electrical system.

[0022] The container structure can be designed with insulation layer, heating and temperature maintenance, and secondary leak prevention, which further improves the safety and practicality of the system.

[0023] The high utilization rate of the tank space in the container makes the pipeline design and pump installation easier, and the overall design simplifies the installation and transportation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a steel-lined plastic storage tank for a liquid flow battery.

[0026] Figure 2 This is a schematic diagram of the appearance structure of a steel-lined plastic storage tank for liquid flow batteries.

[0027] Figure 3 It is a schematic diagram of the structure of the tank.

[0028] Legend:

[0029] 1. Tank body; 11. Liquid outlet flange; 12. Liquid return flange; 13. Multi-interface flange; 14. Manhole flange; 2. Container; 21. Hatch door; 22. Inspection port; 23. Hanging rod; 3. Frame; 4. Support member; 41. Support foot; 411. Arc plate; 42. Connecting rod; 5. Electrical compartment; 51. Isolation plate. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0031] Unless otherwise defined, all professional terms used below have the same meaning as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present utility model.

[0032] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0033] Example: Figure 1-Figure 3As shown, the steel-lined plastic storage tank for liquid flow batteries of this embodiment includes a tank body 1, on which a liquid outlet flange 11 and a liquid return flange 12 are provided, and a container 2 is also provided. The tank body 1 is placed in the container 2, and a plurality of support members 4 are provided between the tank body 1 and the frame 3 of the container 2, and an electrical compartment 5 is provided between the container 2 and the tank body 1. First, the tank body 1 is placed in the container 2, and a plurality of support members 4 are used to form a stable structure between the tank body 1 and the frame 3 of the container 2, thereby increasing the structural strength and service life of the storage tank. At the same time, the use of steel-lined plastic materials improves the corrosion resistance of the storage tank and meets the requirements of acid and alkali corrosion resistance. The lining plastic material is LLDPE, the lining plastic thickness is 6mm, the operating temperature range is -5℃~100℃, and the temperature needs to be maintained above -10℃ to avoid low-temperature brittleness. Through the integrated design, the cost of purchasing the container 2 and the assembly process of the storage tank and the container 2 are reduced, and the production and assembly costs are significantly reduced.

[0034] Secondly, an electrical compartment 5 is provided between the container 2 and the tank body 1, so that electrical equipment can be centrally managed, reducing the complexity of electrical connections and improving the safety and reliability of the electrical system. At the same time, the container 2 can be designed with insulation layer, heating and temperature maintenance, and secondary leakage prevention, further improving the safety and practicality of the system. The high space utilization rate of the tank body 1 in the container 2 makes the pipeline design and pump installation easier, and the overall design simplifies the installation and transportation process.

[0035] Taking the 30-foot container of the 1MWh system of the all-vanadium liquid flow battery containing 30m³ electrolyte as an example, the cost of the steel-lined plastic storage tank is basically the same as that of the prefabricated tank of the open mold square tank, and the cost is reduced by 35% compared with the prefabricated tank of the welded square tank. The steel-lined plastic solution is flexible in design and adjustment, eliminating the assembly process of the storage tank and container 2, and the output can reach 10 per day, which is the same as the open mold square tank. The overall design not only reduces costs, but also meets the same transportation standards as container 2, and meets the secondary leakage prevention requirements through the tank cabin, eliminating the construction of accident emergency pools.

[0036] The material of the frame 3 is not limited to rotational molding, and can also be a composite process of steel and plastic, such as spray molding.

[0037] In this embodiment, the electrical compartment 5 is used to install pumps, electrical equipment, pipes, etc.

[0038] In this embodiment, an isolation plate 51 is provided on the side of the electrical compartment 5 close to the tank body 1. First, the isolation plate 51 effectively isolates the electrical compartment 5 from the tank body 1, prevents the electrical equipment from contacting the electrolyte in the tank, and enhances the safety of the system. Secondly, the isolation plate 51 can provide an additional layer of protection, reduce the risks that may be caused by electrical equipment failure, and ensure the stable operation of the electrical system. In addition, the provision of the isolation plate 51 simplifies the maintenance and inspection process of electrical equipment and improves the convenience of operation. On the whole, the presence of the isolation plate 51 not only improves the safety and reliability of the system, but also optimizes the layout of the electrical compartment and improves the functionality and maintainability of the entire tank system.

[0039] In this embodiment, a hatch 21 is provided on the container 2, and the electrical compartment 5 is located between the hatch 21 and the isolation plate 51, and the hatch 21 is connected to the electrical compartment 5. First, the provision of the hatch 21 makes it easier to enter and exit the electrical compartment 5, facilitates the installation, inspection and maintenance of electrical equipment, and improves the convenience of operation. Secondly, the electrical compartment 5 is located between the hatch 21 and the isolation plate 51. This layout effectively isolates the electrical compartment 5 from the tank body 1, increases the safety of the system, prevents electrical equipment from contacting the electrolyte in the storage tank, and reduces safety hazards. In addition, the isolation plate 51 provides an additional layer of protection to further ensure the safe and stable operation of the electrical system. The overall design optimizes space utilization and improves the functionality and maintenance efficiency of the system.

[0040] In this embodiment, a multi-interface flange 13 and a manhole flange 14 are provided on the tank body 1, and an inspection port 22 is provided on the container 2, and the inspection port 22 corresponds to the multi-interface flange 13 and the manhole flange 14 in upper and lower directions. First, the multi-interface flange 13 is convenient for the installation of interfaces such as sensors, air intake and exhaust, and the setting of the manhole flange 14 makes the operation and maintenance of the tank body 1 more flexible and convenient, and is convenient for the entry and exit of liquids and the entry and maintenance of personnel. Secondly, the inspection port 22 corresponds to the multi-interface flange 13 and the manhole flange 14 in upper and lower directions, making the maintenance operation more convenient, reducing the work difficulty and time of maintenance personnel, and improving maintenance efficiency. In addition, this design optimizes the layout between the container 2 and the tank body 1, ensuring efficient operation and maintenance in a limited space. On the whole, this design improves the functionality, operability and maintainability of the system, and enhances the reliability and service life of the equipment.

[0041] In this embodiment, the surface of the tank body 1 is wrapped with a heating tape, and the inner wall of the container 2 is covered with a rock wool purification board. The heating tape effectively maintains the temperature of the liquid in the tank body 1 to prevent low temperature from affecting the performance of the liquid. The rock wool purification board provides good thermal insulation and fireproof performance, further improving the safety and energy efficiency of the system.

[0042] In this embodiment, a plurality of suspension rods 23 are provided on the frame 3, and each suspension rod 23 is movably connected to the frame 3. First, the provision of the suspension rods 23 allows the tank body 1 to be conveniently hoisted and adjusted during transportation and installation, thereby improving the flexibility of operation. Secondly, each suspension rod 23 can be extended and retracted relative to the frame 3, and the design of the force point of the hoisting rope makes the alignment and adjustment during the hoisting process more precise, ensuring that the tank body 1 is stably fixed in the frame 3, thereby reducing errors during the installation process. Overall, this design enhances the installation efficiency and stability of the system, while providing greater operational convenience.

[0043] In this embodiment, the support member 4 includes a support foot 41 and a connecting rod 42. First, the support foot 41 provides a stable foundation to ensure the stability and safety of the tank body 1 in the container 2 and prevent it from tilting or moving during use. Secondly, the connecting rod 42 connects the support foot 41 to the frame 3 of the tank body 1 or the container 2 to form a solid support structure, which enhances the overall mechanical stability and load-bearing capacity. This design not only improves the stability and durability of the tank system, but also simplifies the assembly and adjustment process of the structure. On the whole, the setting of the support member 4 optimizes the installation and operation of the tank body 1, ensuring the reliability of the system and the safety of long-term use.

[0044] In this embodiment, the support foot 41 is connected between the side of the tank body 1 and the frame 3, and the support foot 41 extends in a direction perpendicular to the length of the container 2. First, the support foot 41 is connected between the side of the tank body 1 and the frame 3, which can effectively share the weight of the tank body 1, provide stable support, prevent the tank body 1 from tilting or shifting in the container 2, and enhance the stability of the overall structure. Secondly, the support foot 41 extends in a direction perpendicular to the length of the container 2, which can evenly distribute the load and improve the balance and bearing capacity of the structure. This design not only improves the stability of the tank body 1, but also simplifies the installation and adjustment process, ensuring the fixation and safety of the tank body 1 in the container 2. Overall, this support structure optimizes the stability and durability of the tank system.

[0045] In this embodiment, an arc plate 411 is provided at one end of the support foot 41 close to the tank body 1, and the arc plate 411 is provided with an arc surface that fits the tank body 1. First, the arc surface of the arc plate 411 can fit tightly against the tank body 1, ensuring that the contact between the support foot 41 and the tank body 1 is more uniform and stable, thereby enhancing the overall stability of the support structure. Secondly, this design reduces the pressure concentration at the contact point, disperses the load, reduces local stress, and avoids possible damage to the tank body 1. The arc-shaped design of the arc plate 411 makes the connection between the support foot 41 and the tank body 1 tighter, effectively improving the reliability and durability of the support. On the whole, this design improves the stability of the support system and the safety of long-term use.

[0046] In this embodiment, the connecting rod 42 is connected between the end of the tank body 1 and the frame 3, and an acute angle is formed between the connecting rod 42 and the frame 3. First, the acute angle formed between the connecting rod 42 and the frame 3 can effectively transfer and disperse the load of the tank body 1, thereby enhancing the overall stability and load-bearing capacity of the supporting structure. Secondly, the design of the acute angle helps to make more precise adjustments to the connecting rod 42 during the installation process, ensuring that the position of the tank body 1 in the frame 3 is more accurate, thereby improving the convenience and accuracy of installation. Overall, this acute angle connection design optimizes the stability of the supporting structure, provides better mechanical support and load distribution, and ensures the reliability of the system and safety in long-term use.

[0047] The processing of steel lined plastic storage tank is as follows:

[0048] Plastic lining and welding: After the plastic lining of the tank body 1 is completed, the support legs 41 are welded and fixed on the tank body 1 .

[0049] Lifting and positioning: Lift and position the steel-lined plastic tank into the frame of container 2, such as Figure 1 shown.

[0050] Fixing: The support legs 41 are welded and fixed to the bottom plate of the container 2. The steel-lined plastic tank and the frame of the container 2 are welded and fixed through the tank body connecting rod 3.

[0051] Surface treatment: The surface of the steel-lined plastic tank is wrapped with a heating tape to maintain temperature.

[0052] Frame treatment of container 2: weld the three sides of the frame of container 2 with splayed plates to seal. Install the electrical hatch 10 on the other side. Weld the corrugated plate on the top surface and install the inspection port 11.

[0053] Insulation treatment: Except for the bottom surface, the other surfaces of the tank cabin are covered with 50mm thick rock wool purification board for insulation treatment. The tank cabin is painted with anti-corrosion paint to achieve the purpose of secondary leakage prevention.

[0054] Installation of electrical compartment: Install the pump and pipeline in the electrical compartment 1. Drill holes in the iron plate wall 2 and connect them to the liquid outlet flange 8 of the tank body 1 and the liquid return flange 9 of the tank body.

[0055] Filling and completion: After all installations are completed, open the inspection port 11, fill the tank through the manhole flange 5, and the steel-lined plastic storage tank can be put into use.

Claims

1. A steel-lined plastic storage tank for a liquid flow battery, comprising a tank body (1), wherein the tank body (1) is provided with a liquid outlet flange (11) and a liquid return flange (12), characterized in that: It also comprises a container (2), wherein the tank body (1) is placed in the container (2), a plurality of support members (4) are arranged between the tank body (1) and the frame (3) of the container (2), and an electrical compartment (5) is arranged between the container (2) and the tank body (1).

2. The steel-lined plastic storage tank for liquid flow battery according to claim 1, characterized in that: An isolation plate (51) is provided on one side of the electrical compartment (5) close to the tank body (1).

3. The steel-lined plastic storage tank for liquid flow battery according to claim 2, characterized in that: The container (2) is provided with a hatch (21), the electrical compartment (5) is located between the hatch (21) and the isolation plate (51), and the hatch (21) is in communication with the electrical compartment (5).

4. The steel-lined plastic storage tank for liquid flow battery according to claim 1, characterized in that: The tank body (1) is provided with a multi-interface flange (13) and a manhole flange (14), and the container (2) is provided with an inspection port (22), and the inspection port (22) corresponds to the multi-interface flange (13) and the manhole flange (14) in upper and lower parts.

5. The steel-lined plastic storage tank for liquid flow battery according to claim 1, characterized in that: The surface of the tank body (1) is wrapped with a heating tape, and the inner wall of the container (2) is covered with a rock wool purification board.

6. The steel-lined plastic storage tank for liquid flow battery according to claim 1, characterized in that: A plurality of suspension rods (23) are provided on the frame (3), and each of the suspension rods (23) is movably connected to the frame (3).

7. The steel-lined plastic storage tank for a liquid flow battery according to any one of claims 1 to 6, characterized in that: The support member (4) comprises a support foot (41) and a connecting rod (42).

8. The steel-lined plastic storage tank for liquid flow battery according to claim 7, characterized in that: The supporting foot (41) is connected between the side of the tank body (1) and the frame (3), and the supporting foot (41) extends in a direction perpendicular to the length of the container (2).

9. The steel-lined plastic storage tank for liquid flow battery according to claim 8, characterized in that: An arc plate (411) is provided at one end of the support foot (41) close to the tank body (1), and the arc plate (411) is provided with an arc surface that fits the tank body (1).

10. The steel-lined plastic storage tank for liquid flow battery according to claim 7, characterized in that: The connecting rod (42) is connected between the end of the tank body (1) and the frame (3), and an acute angle is formed between the connecting rod (42) and the frame (3).

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