Recycling device for carbon felt electrode of flow battery

Abstract

The utility model discloses a liquid flow battery carbon felt electrode cleaning and draining device which comprises a recycling box body, a box cover is arranged on the top of the recycling box body, the box cover is connected with the recycling box body in a sealing mode, and the box cover is communicated with a fan. The box cover is provided with a water pipe access port and an air pipe interface, and the air pipe interface is connected with the fan through an air pipe pipeline; a movable water distribution pore plate is arranged at the upper part of the inner side of the recycling box body; a fixed draining pore plate is arranged in the middle of the recycling box body, a carbon felt electrode is placed on the draining pore plate, an outlet is formed in the bottom of the recycling box body, and a liquid receiving disc or a water bucket is arranged below the outlet; the utility model has the advantages that the recycling box body can be designed according to the sizes of different materials, so that the electrodes are effectively prevented from being bent and damaged due to thicker thickness, cleaning, draining and waste water recycling of any quantity of materials can be realized, the quantity of waste water is greatly reduced, the working efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the recycling and reuse of a carbon felt electrode, in particular to a recycling device for a carbon felt electrode of a flow battery, belonging to the field of carbon felt electrode recycling. Background Art

[0002] At present, the large-capacity energy storage technologies mainly include mechanical energy storage, electromagnetic energy storage, molten salt heat storage, and electrochemical energy storage, etc. Among them, the electrochemical energy storage technology has attracted much attention due to its advantages such as short response time, large energy density, flexibility and convenience, and flow energy storage is an important part of it.

[0003] A flow battery is a reaction medium for converting high-performance electric energy and chemical energy by separating the positive and negative electrolyte solutions and circulating them respectively. The battery stack is formed by stacking multiple basic single cells to provide a higher voltage and achieve a higher power. However, during the performance test of the product and the operation process of the station, when there are unqualified products, leakage or locally damaged single cells, the stack needs to be disassembled to remove the damaged components and then reassembled and tested. After disassembly, the carbon felt electrode contains acidic solution and needs to be cleaned and recycled.

[0004] The traditional cleaning device has a single function and produces a large amount of hazardous waste. The traditional cleaning and draining device is generally an integrated machine composed of special equipment such as a closed large-scale centrifugal drum and a centrifuge; generally including an equipment shell, a driving device, a rotating drum, a solenoid valve, a control panel (integrating temperature control, metering, etc.), a heating device, etc.; the integrated equipment can meet the cleaning of conventional ordinary parts, but is not suitable for the cleaning and draining of acid-containing electrodes in a flow battery stack, and consumes a large amount of water and has high recycling and treatment costs. Content of the Utility Model

[0005] The purpose of the utility model is to design a recycling device for a carbon felt electrode of a flow battery, which can effectively avoid the bending damage caused by the thick electrode, and can also realize the cleaning, draining and waste water recycling of any number of materials, greatly reducing the amount of waste water while improving the working efficiency and reducing the cost.

[0006] The technical solution of the utility model is as follows:

[0007] A recycling method for a carbon felt electrode of a flow battery includes the following steps:

[0008] (1) Design a recycling box: Design the size of the recycling box according to the size of the carbon felt electrode, effectively avoiding bending or coiling placement due to unsuitable size during use, resulting in bending damage due to the thick electrode;

[0009] (2) Cleaning: Place the carbon felt electrode in the recycling box body, quantitatively add cleaning water from the top of the recycling box body. The cleaning water passes through the water distribution orifice plate above the carbon felt electrode and is evenly distributed to the carbon felt electrode in the recycling box body. At the same time, pass high-pressure gas and blow air into the recycling box body. The air flow passes through the water distribution orifice plate from top to bottom, and the water flow quickly flows under the action of the air flow to wash the carbon felt electrode.

[0010] (3) Drainage: Place the carbon felt electrode on the drainage orifice plate. The water flow only passes through the drainage orifice plate in the area covered by the carbon felt electrode, and the orifice holes of the drainage orifice plate in other positions are blocked or sealed, realizing the cleaning and drainage of carbon felt electrodes of any shape smaller than the size of the recycling box body, and improving the cleaning and drainage effect.

[0011] (4) Recycling of cleaning water: The cleaning water passing through the drainage orifice plate falls from the outlet at the bottom of the recycling box body into the liquid receiving tray or bucket for recycling of the cleaning water.

[0012] (5) Detection: Confirm whether the drainage is complete by measuring the amount of water discharged from the outlet, and confirm whether the cleaning is clean by detecting the pH value of the discharged water with a pH test paper.

[0013] (6) Repeat the above steps (2)-(5) for cyclic operation until the cleaning is complete.

[0014] The fan provides high-pressure gas for the recycling box body. According to the fan air pressure limit, when designing the recycling box body, consider the pressure-bearing capacity of the recycling box body and appropriately increase strengthening measures such as reinforcing ribs to prevent the recycling box body from being damaged and difficult to open and close or bulging due to too high air pressure. Designed according to the limit air pressure of the fan, it can meet the stacking of a certain number of carbon felt electrodes within a certain height inside the recycling box body.

[0015] A recycling device for carbon felt electrodes of a flow battery, comprising a recycling box body, the top of the recycling box body is provided with a box cover, the box cover is hermetically connected to the recycling box body, and the box cover is connected to the fan; the box cover is provided with a water pipe inlet and an air pipe interface, and the air pipe interface is connected to the fan through an air pipe; the upper part inside the recycling box body is provided with a movable water distribution orifice plate for splitting the cleaning water and the air flow; a fixed drainage orifice plate is arranged in the middle of the recycling box body, the carbon felt electrode is placed on the drainage orifice plate, the bottom of the recycling box body is provided with an outlet, and a semi-closed liquid receiving tray or bucket is arranged below the outlet for collecting the cleaning water, and the cleaning water flow on the carbon felt electrode flows to the liquid receiving tray or bucket through the outlet at the bottom of the recycling box body along with the air flow.

[0016] The water flow passes through the drain hole plate only in the area covered by the carbon felt electrode, and the holes of the drain hole plate in other positions are blocked or sealed. The drain hole plate is partially blocked by a sealing tape, which can realize the cleaning and draining of carbon felt electrodes with any shape smaller than the size of the recovery box. The redundant air flow holes can be blocked by a sealing tape to realize the cleaning and draining of irregular carbon felt electrode sizes smaller than the area of the drain hole plate.

[0017] A flow meter and a control valve are provided at the water pipe inlet, which can measure the amount of cleaning water entering the recovery box and quantitatively control the cleaning water.

[0018] The liquid receiving tray or the water bucket is provided with a liquid level scale or a liquid level gauge, which can measure the amount of recovered water in the liquid receiving tray.

[0019] The water distribution hole plate and the drain hole plate have the same structure, and the aperture of the holes on the plate is 5-10 mm.

[0020] Sealing slots are provided around the recovery box, and the edge of the box cover is inserted into the sealing slots and fixed by fixing buckles; a sealing rubber strip is provided in the sealing slots to improve the sealing performance.

[0021] The water distribution hole plate is detachably sealed and connected to the recovery box. The cleaning water flows from the water pipe inlet on the box cover to the water distribution hole plate, realizing the uniform flow distribution of the cleaning water onto the carbon felt electrode in the recovery box; the gas passes through the air pipe interface to the water distribution hole plate, which can realize the uniform flow distribution of the air flow into the recovery box.

[0022] The outlet is a beveled closing type outlet.

[0023] The fan is provided with a control device for controlling the start and stop of the fan.

[0024] The box cover is provided with a lifting handle for convenient lifting.

[0025] Reinforcing ribs are provided on the recovery box to enhance the pressure-bearing capacity of the recovery box.

[0026] During use, lay the carbon felt electrode flat on the drain hole plate, place the water distribution hole plate in the upper offset card slot of the recovery box, cover the box cover, lock the box cover with a fixing buckle, send the cleaning water into the recovery box through the water pipe inlet, measure and add a fixed amount of cleaning water through the front-end water meter, close the water valve, turn on the fan, confirm whether the draining is complete by observing the amount of water discharged from the outlet, and confirm whether the cleaning is clean by detecting the pH value of the discharged water with a pH test paper. Repeat the water replenishment and cleaning to achieve multiple washes.

[0027] The amount of cleaning water added each time does not exceed 3-5 times the weight of the electrode itself. According to laboratory tests, the water absorption limit of the electrode is 5 times its own weight; adding too much water not only causes waste but also does not improve the washing effect. Following the principle of small amounts and multiple times can reduce the amount of waste generated.

[0028] The beneficial effects of the present utility model are as follows: effectively avoiding the bending damage caused by the relatively thick electrodes, and also being able to achieve the cleaning, draining and waste water recycling of any number of materials, greatly reducing the amount of waste water while improving the work efficiency and reducing the cost.

[0029] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0030] Figure 1 It is a schematic structural diagram of a liquid flow battery carbon felt electrode recycling device according to an embodiment of the present utility model;

[0031] Figure 2 It is a schematic structural diagram of a water distribution hole plate / draining hole plate according to an embodiment of the present utility model;

[0032] In the figure: 1, water pipe inlet; 2, box cover; 3, lifting handle; 4, water distribution hole plate; 5, fixing buckle; 6, recycling box body; 7, draining hole plate; 8, outlet; 9, liquid receiving tray; 10, air pipe interface; 11, reinforcing rib; 12, air pipe; 13, high-pressure blower. Specific Embodiments

[0033] The following describes the preferred embodiments of the present utility model. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. Embodiment 1

[0034] A method for recycling a liquid flow battery carbon felt electrode includes the following steps:

[0035] (1) Designing the recycling box body: Design the size of the recycling box body according to the size of the carbon felt electrode (with appropriate redundancy). For example, in this embodiment, the model size of the carbon felt electrode is 1200*500*4 mm in length, width and height, and the internal size of the recycling box body is designed to be 1300*600*1000 mm in length, width and height, effectively avoiding bending or coiling and placing due to size inadaptability during use, resulting in bending damage due to the relatively thick electrodes;

[0036] (2) Cleaning: Place the carbon felt electrode in the recycling box body, quantitatively add cleaning water from the top of the recycling box body, and the cleaning water passes through the water distribution hole plate above the carbon felt electrode and is evenly distributed to the carbon felt electrode in the recycling box body; at the same time, pass high-pressure gas and blow air into the recycling box body, and the air flow passes through the water distribution hole plate from top to bottom, and the water flow quickly flows under the action of the air flow to wash the carbon felt electrode; the air flow speed is usually 500 m 3 / h;

[0037] (3)Draining: Place the carbon felt electrode on the draining orifice plate. Water flows through the draining orifice plate only in the area covered by the carbon felt electrode, and the orifice holes of the draining orifice plate in other positions are blocked or sealed, achieving the cleaning and draining of carbon felt electrodes of any shape smaller than the size of the recovery box, and improving the cleaning and draining effect;

[0038] (4)Recycling of cleaning water: The cleaning water passing through the draining orifice plate falls from the outlet at the bottom of the recovery box into the liquid receiving tray 9 or a bucket for recycling of the cleaning water;

[0039] (5)Detection: Confirm whether the draining is complete by measuring the amount of water discharged from the outlet, and confirm whether the cleaning is clean by using pH test paper to detect the pH value of the discharged water; Usually, the pH value of 5 - 7 is acceptable;

[0040] (6)Repeat the above steps (2) - (5) for cyclic operation until the cleaning is complete.

[0041] The recovery box is connected to the blower, and high - pressure gas is provided by the blower. According to the blower's wind pressure limit, appropriate strengthening measures such as reinforcing ribs are considered when designing the recovery box to increase its pressure - bearing capacity, preventing damage to the recovery box due to excessive wind pressure, difficult opening and closing, or cracking; Designed according to the blower's limit wind pressure, it can meet the stacking of carbon felt electrodes within a certain height inside the recovery box. For example, the blower model in this embodiment is RB - 92S - 1, and the limit wind pressure is 100 kPa.

[0042] As Figure 1-2 shown, a recycling device for carbon felt electrodes of a flow battery includes main components such as a recovery box 6, an air duct 12, a high - pressure blower 13, and a liquid receiving tray 9;

[0043] The high - pressure blower 13 is provided with a control device, which is an electric control cabinet for the blower in this embodiment. The electric control cabinet is connected to the power supply to control the start and stop of the high - pressure blower 13; The high - pressure blower 13 is connected to the recovery box 6 through the air duct 12, and the air duct 12 is connected to the air duct interface 10 on one side of the top of the recovery box 6.

[0044] The top of the recovery box 6 is provided with a box cover 2, and the box cover 2 is provided with components such as a lifting handle 3, a water pipe inlet 1, and an air duct interface 10.

[0045] The box cover 2 is hermetically connected to the recovery box 6. Sealing slots are provided around the recovery box 6, and the edge of the box cover 2 is inserted into the sealing slots and fixed by fixing buckles 5; A sealing rubber strip is provided in the sealing slots to improve the sealing performance.

[0046] An active water diversion orifice plate 4 is provided at the upper inner part of the recovery box body 6 for diverting cleaning water and air flow. The four sides of the orifice plate 4 are hermetically sealed with the inner surrounding of the recovery box body 6 by dislocation card slots. The cleaning water flows from the water pipe inlet 1 on the box cover 2 to the orifice plate 4, realizing uniform flow distribution of the cleaning water to the carbon felt electrodes in the recovery box body 6; the gas flows from the air pipe interface 10 to the orifice plate 4, and uniform flow distribution of the air flow to the inside of the recovery box body 6 can be achieved.

[0047] Reinforcing ribs 11 are provided on the inner periphery of the recovery box body 6 for enhancing the pressure-bearing capacity of the recovery box body.

[0048] A fixed water drainage orifice plate 7 is provided in the middle of the recovery box body 6. The water drainage orifice plate 7 is partially blocked by a sealing tape, which can realize the cleaning and water drainage of carbon felt electrodes with any shape smaller than the size of the recovery box body. The redundant air flow holes can be blocked by a sealing tape, and the cleaning and water drainage of irregular carbon felt electrode sizes smaller than the area of the water drainage orifice plate 7 can be realized.

[0049] An outlet 8 is provided at the bottom of the recovery box body. The outlet 8 is an inclined surface closing type outlet; a semi-closed liquid receiving tray 9 or a water bucket is provided below the outlet 8 for collecting cleaning water. The cleaning water on the carbon felt electrode flows to the liquid receiving tray 9 through the outlet 8 at the bottom of the recovery box body 6 along with the high-pressure air flow.

[0050] A flow meter and a control valve are provided at the water pipe inlet 1, which can measure the amount of cleaning water entering the recovery box body 6 and quantitatively control the cleaning water.

[0051] The liquid receiving tray 9 or the water bucket is provided with a liquid level scale or a liquid level gauge, which can measure the amount of recycled water in the liquid receiving tray 9.

[0052] The water diversion orifice plate 4 and the water drainage orifice plate 7 have the same structure, and the aperture size of the plate holes is 5-10 mm.

[0053] Lay the carbon felt electrode flat on the water drainage orifice plate 7, place the water diversion orifice plate 4 in the upper dislocation card slot of the recovery box body 6, cover the box cover 2, lock the box cover 2 with the fixed buckle 5, send the cleaning water into the recovery box body through the water pipe inlet 1, measure and add a fixed amount of cleaning water through the front-end water meter, close the water valve, turn on the fan, confirm whether the water drainage is complete by observing the amount of water discharged from the outlet 8, and confirm whether the cleaning is clean by detecting the pH value of the discharged water with a pH test paper, and repeat the water replenishment and cleaning to achieve multiple washes.

[0054] The amount of cleaning water added each time does not exceed 3-5 times the self-weight (300 g) of the electrode. According to laboratory tests, the water absorption limit of the electrode is 5 times its own weight; adding too much amount not only causes waste but also does not improve the washing effect. Following the principle of adding less and multiple times can reduce the amount of waste generated.

Claims

1. A carbon felt electrode recovery device for a flow battery, characterized in that: It includes a recovery box body, a box cover is provided on the top of the recovery box body, the box cover is sealed and connected to the recovery box body, and the box cover is communicated with the fan; the box cover is provided with a water pipe access port and an air duct interface, and the air duct interface is connected to the fan through an air duct pipeline; a movable water diversion orifice plate is provided on the upper inner side of the recovery box body for diverting cleaning water and airflow; a fixed drainage orifice plate is provided in the middle of the recovery box body, and a carbon felt electrode is placed on the drainage orifice plate; an outlet is provided at the bottom of the recovery box body, and a liquid receiving tray or a bucket is provided below the outlet for collecting cleaning water.

2. A liquid flow battery carbon felt electrode recovery device according to claim 1, characterized in that: A flow meter and a control valve are arranged at the water pipe inlet.

3. A liquid flow battery carbon felt electrode recovery device according to claim 1, characterized in that: The liquid receiving tray or water bucket is provided with a liquid level scale or a liquid level meter.

4. A liquid flow battery carbon felt electrode recovery device according to claim 1, characterized in that: The water distribution orifice plate and the drainage orifice plate have the same structure, and the diameter of the plate holes is 5-10mm.

5. The carbon felt electrode recovery device for a liquid flow battery according to claim 1, characterized in that: The recycling box body is provided with sealing slots around its periphery, the edge of the box cover is inserted into the sealing slots and fixed by fixing buckles; a sealing strip is provided in the sealing slots.

6. A liquid flow battery carbon felt electrode recovery device according to claim 1, characterized in that: The water distribution orifice plate is detachably sealed to the recovery box.

7. A liquid flow battery carbon felt electrode recovery device according to claim 1, characterized in that: The fan is provided with a control device for controlling the start and stop of the fan.

8. The carbon felt electrode recovery device for a liquid flow battery according to claim 1, characterized in that: The outlet is a sloped closing outlet.

9. A liquid flow battery carbon felt electrode recovery device according to claim 1, characterized in that: The box cover is provided with a lifting handle.

10. The carbon felt electrode recovery device for a liquid flow battery according to claim 1, characterized in that: The recovery box is provided with reinforcing ribs.

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