Hydrogen collecting system of aluminum-air fuel cell

Abstract

The utility model discloses an aluminum-air fuel cell hydrogen collecting system which comprises an aluminum-air fuel cell unit, a gas-liquid separator, a water tank, a gas washing bottle and a vacuum pump, a liquid outlet of an electric pile of the aluminum-air fuel cell unit is communicated with a liquid inlet of the gas-liquid separator through a liquid discharge pipe, and a gas outlet of the gas-liquid separator is connected with an exhaust pipe. The other end of the exhaust pipe extends into the gas washing bottle, the gas washing bottle is inversely buckled in the water tank, the gas washing bottle is filled with water, a bottle opening of the gas washing bottle is located below the liquid level in the water tank, an exhaust port is formed in the upper portion of the gas washing bottle, the exhaust port is connected with a collecting pipe, the vacuum pump is arranged on the collecting pipe, and the end, away from the gas washing bottle, of the collecting pipe is connected with a gas collecting container. The hydrogen purification device can efficiently collect and purify hydrogen, fully utilize resources and reduce resource waste.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, more specifically, the utility model relates to an aluminum air fuel cell hydrogen collection system. BACKGROUND

[0002] Aluminum air battery is with high purity aluminum as negative electrode, oxygen as positive electrode, KOH or NaOH aqueous solution as electrolyte, takes in oxygen in air and carries out reaction discharge. Due to its big specific energy characteristics, can make battery mass greatly reduces, plus energy saving and environmental protection, has great market value and application potential.

[0003] When aluminum air battery discharges, aluminum and oxygen are converted into aluminum oxide, and hydrogen generated by the side reaction, the hydrogen at this time is not pure hydrogen, but also doped with water vapor of electrolyte solution. According to actual detection data shows that aluminum air battery can produce more than 130L of hydrogen for every degree of electricity, hydrogen is widely used, can be used for power generation, reducing agent, industrial special gas etc., if these hydrogen is directly released, undoubtedly a kind of resource waste, therefore, how to effectively collect, purify hydrogen for aluminum air fuel cell unit or system is the problem necessary to be solved by the person skilled in the art. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model innovatively provides an aluminum air fuel cell hydrogen collection system, which can efficiently collect hydrogen and purify, fully utilize resources and reduce resource waste.

[0005] To achieve the above technical purpose, the utility model discloses an aluminum air fuel cell hydrogen collection system, which comprises an aluminum air fuel cell unit, a gas-liquid separator, a water tank, a gas washing bottle and a vacuum pump,

[0006] The liquid outlet of the stack of the aluminum air fuel cell unit is communicated with the liquid inlet of the gas-liquid separator through a liquid discharge pipe,

[0007] The gas outlet of the gas-liquid separator is connected with an exhaust pipe, and the other end of the exhaust pipe extends into the gas washing bottle,

[0008] The gas washing bottle is inverted in the water tank, the gas washing bottle is filled with water, and the bottle opening of the gas washing bottle is below the liquid level in the water tank,

[0009] The upper portion of the gas washing bottle is provided with an exhaust port, the exhaust port is connected with a collection pipe, the vacuum pump is arranged on the collection pipe, and the end portion of the collection pipe away from the gas washing bottle is connected with a gas collecting container.

[0010] Further, an automatic collecting unit is further included, the automatic collecting unit includes a controller, an upper liquid level sensor and a lower liquid level sensor, the upper liquid level sensor and the lower liquid level sensor are arranged in the gas washing bottle, the upper liquid level sensor is located above the lower liquid level sensor, and the vacuum pump, the upper liquid level sensor and the lower liquid level sensor are electrically connected with the controller respectively.

[0011] Further, a branch emptying pipe is branched on the collecting pipe, a reversing valve is arranged at the communication position of the collecting pipe and the emptying pipe, and the vacuum pump is arranged between the gas washing bottle and the reversing valve.

[0012] Further, the gas-liquid separator is a cyclone.

[0013] Further, the cyclone includes a cylindrical section and one or more circular truncated cone sections connected to the bottom of the cylindrical section, and the circular truncated cone sections are connected in sequence along the axial direction.

[0014] Further, the liquid outlet of the gas-liquid separator is connected with the electrolyte tank of the aluminum air fuel cell unit through a liquid return pipe.

[0015] Further, a one-way valve that is open to the electrolyte tank is arranged on the liquid return pipe.

[0016] Further, a balance valve is arranged at the top of the electrolyte tank.

[0017] The aluminum air fuel cell hydrogen collecting system has the advantages that:

[0018] The aluminum air fuel cell hydrogen collecting system can efficiently collect hydrogen and purify the hydrogen, fully utilizes resources and reduces resource waste. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure schematic view of the aluminum air fuel cell hydrogen collecting system of the utility model embodiment.

[0020] Figure 2 is a structure schematic view of the gas-liquid separator of the utility model embodiment.

[0021] In the drawings,

[0022] 1, aluminum air fuel cell unit; 11, electric pile; 12, electrolyte tank; 13, liquid inlet pipe; 14, balance valve; 2, gas-liquid separator; 21, cylindrical section; 22, first circular truncated cone section; 23, second circular truncated cone section; 3, water tank; 4, gas washing bottle; 5, vacuum pump; 6, liquid outlet pipe; 7, exhaust pipe; 8, collecting pipe; 81, emptying pipe; 82, reversing valve; 9, upper liquid level sensor; 10, lower liquid level sensor; 20, liquid return pipe. DETAILED DESCRIPTION

[0023] The aluminum-air fuel cell hydrogen collecting system provided by the utility model is explained and described in detail in combination with the drawings of the specification.

[0024] The aluminum-air fuel cell hydrogen collecting system specifically disclosed in the embodiment comprises an aluminum-air fuel cell unit 1, a gas-liquid separator 2, a water tank 3, a gas washing bottle 4 and a vacuum pump 5. Figure 1 As shown, the aluminum-air fuel cell unit 1 comprises a stack 11 and an electrolyte tank 12, the liquid outlet of the electrolyte tank 12 is connected with the stack 11 through a liquid inlet pipe 13, the electrolyte in the electrolyte tank 12 enters into the stack 11 through the liquid inlet pipe 13, and an electrochemical reaction occurs in the stack 11.

[0025] The liquid outlet of the stack 11 of the aluminum-air fuel cell unit 1 is communicated with the liquid inlet of the gas-liquid separator 2 through a liquid outlet pipe 6, and the water vapor doped with the electrolyte solution generated by the side reaction in the stack 11 enters into the gas-liquid separator 2 to be separated.

[0026] The gas-liquid separator 2 is connected with an exhaust pipe 7 at the gas outlet, the other end of the exhaust pipe 7 extends into the gas washing bottle 4, the gas-liquid separator 2 separates the gas and the electrolyte, the gas enters into the gas washing bottle 4 through the exhaust pipe 7, and the gas at this time comprises hydrogen and water vapor doped with the dissolved electrolyte.

[0027] Optionally, the liquid outlet of the gas-liquid separator 2 is connected with the electrolyte tank 12 of the aluminum-air fuel cell unit 1 through a liquid return pipe 20, the electrolyte separated by the gas-liquid separator 2 flows back into the electrolyte tank 12 through the liquid return pipe 20, and the electrolyte is reused.

[0028] Optionally, a one-way valve that conducts to the direction of the electrolyte tank 12 is arranged on the liquid return pipe 20, the electrolyte unidirectionally flows into the electrolyte tank 12, and the electrolyte in the electrolyte tank is prevented from flowing out into the liquid return pipe 20.

[0029] Preferably, a balance valve 14 is arranged on the top of the electrolyte tank 12, the pressure in the electrolyte tank 12 is balanced, the smooth liquid supply of the electrolyte tank 12 to the stack 11 is ensured, and the electrolyte in the liquid return pipe 20 smoothly flows into the electrolyte tank 12.

[0030] The gas washing bottle 4 is inverted in the water tank 3, the gas washing bottle 4 is filled with water, the mouth of the gas washing bottle 4 is below the liquid level in the water tank 3, the gas enters the gas washing bottle 4 through the exhaust pipe 7, the gas floats to the upper end of the gas washing bottle 4 and pushes the water in the gas washing bottle 4 downwards, at this time, the gas is collected in the gas washing bottle 4, after the gas is washed by water, the water vapor mixed with electrolyte is dissolved in water, only pure hydrogen gas rises to the top of the gas washing bottle 4. The simple device realizes efficient collection and purification of hydrogen gas.

[0031] The upper part of the gas washing bottle 4 is provided with an exhaust port, the exhaust port is connected with a collecting pipe 8, the vacuum pump 5 is arranged on the collecting pipe 8, and the end of the collecting pipe 8 away from the gas washing bottle 4 is connected with a gas collecting container. Through the pumping action of the vacuum pump 5, the pure hydrogen gas in the gas washing bottle 4 enters the gas collecting container through the collecting pipe 8.

[0032] In some embodiments, the hydrogen gas collecting system of the aluminum air fuel cell of the present application further comprises an automatic collecting unit, the automatic collecting unit comprises a controller, an upper liquid level sensor 9 and a lower liquid level sensor 10, the upper liquid level sensor 9 and the lower liquid level sensor 10 are arranged in the gas washing bottle 4 and are fixed on the bottle body of the gas washing bottle 4. The upper liquid level sensor 9 is located above the lower liquid level sensor 10, the upper liquid level sensor 9 is arranged below the exhaust port of the gas washing bottle 4 and is as close to the exhaust port as possible, and the lower liquid level sensor 10 is arranged above the liquid level of the water tank 3 and is as close to the liquid level of the water tank 3 as possible. The vacuum pump 5, the upper liquid level sensor 9 and the lower liquid level sensor 10 are electrically connected with the controller respectively. The upper liquid level sensor 9 and the lower liquid level sensor 10 are connected with the input end of the controller, the vacuum pump 5 is connected with the output end of the controller, the upper liquid level sensor 9 and the lower liquid level sensor 10 are used for detecting the liquid level height in the gas washing bottle 4 respectively, the controller controls the start and stop of the vacuum pump 5 according to the liquid level height in the gas washing bottle 4. When the liquid level in the gas washing bottle 4 drops below the lower liquid level sensor 10, that is, the lower liquid level sensor 10 cannot detect the water level signal, the controller controls the vacuum pump 5 to start to extract hydrogen gas; after the hydrogen gas is extracted, the water level in the gas washing bottle 4 rises, and when the upper liquid level sensor 9 detects the liquid level signal, it indicates that the hydrogen gas in the gas washing bottle 4 is almost extracted, and the controller controls the vacuum pump 5 to be closed. After the vacuum pump 5 stops, with the electrochemical reaction in the stack 11, the hydrogen gas in the gas washing bottle 4 gradually increases, the water level in the gas washing bottle 4 gradually drops, until the water level drops below the lower liquid level sensor 10, the controller controls the vacuum pump 5 to start again, and the extraction of hydrogen gas starts, when the upper liquid level sensor 9 detects the water level signal, the controller controls the vacuum pump 5 to be closed. In this way, the automatic hydrogen gas collecting mechanism is formed, manual control is no longer needed, and the gas collecting efficiency is improved. The control method of the controller is a common control method in the art and is a function of the controller itself.

[0033] In some embodiments, as Figure 1As shown, a drain pipe 81 branches off from the collecting pipe 8. A reversing valve 82 is installed at the connection between the collecting pipe 8 and the drain pipe 81. The reversing valve 82 controls whether the gas flows towards the gas collection container or towards the drain pipe 81. A vacuum pump 5 is installed between the gas washing bottle 4 and the reversing valve 82. The vacuum pump 5 is used to extract the gas from the gas washing bottle 4. When multiple aluminum-air fuel cell units 1 are installed, they can form a power generation system. During system installation, the gas washing bottle 4 is empty. Each gas washing bottle 4 corresponding to each aluminum-air fuel cell unit 1 needs to be filled with water and then inverted in the water tank 3. This operation requires a lot of time and manpower. This application, through the setting of the vent pipe 81, uses the vacuum pump 5 to extract the air from the gas washing bottle 4 before starting the hydrogen collection operation, and completely releases it through the vent pipe 81, so that the gas washing bottle is filled with water. There is no need to manually fill the water bottle one by one. Then, the reversing valve 82 is switched to the end of the collection pipe 8 that leads to the gas collection container, and the hydrogen collection operation can be started. This saves manpower, simplifies the operation process, improves the operation efficiency, and makes full use of equipment resources.

[0034] When multiple aluminum-air fuel cell units 1 are provided, the collection pipes 8 corresponding to the multiple aluminum-air fuel cell units 1 are connected to the same gas collection container, so that all hydrogen is centrally stored and managed.

[0035] Optionally, such as Figure 2 As shown, the gas-liquid separator 2 is a hydrocyclone, which has high gas-liquid separation efficiency. The working principle of the hydrocyclone is as follows: a mixture of two or more phases with a certain density difference, such as solid-liquid, solid-gas, liquid-liquid, or liquid-gas, is fed into the hydrocyclone at a certain pressure or initial velocity from the tangential or involute direction. The fluid rotates at high speed inside the hydrocyclone. Under the action of centrifugal force, the coarse phase of the fluid moves downward and outward while rotating, eventually forming an outer vortex, which is discharged from the underflow outlet in the form of an underflow. Meanwhile, the lighter phase, which has a smaller density or diameter, moves inward and upward while rotating, eventually forming an inner vortex, which is discharged from the top overflow outlet in the form of an overflow, thus completing the separation task.

[0036] Preferred, such as Figure 2 As shown, the hydrocyclone includes a cylindrical section 21 and one or more frustum sections connected to the bottom of the cylindrical section 21, with the multiple frustum sections connected sequentially along the axial direction. That is, the hydrocyclone can be a two-section type, consisting only of the cylindrical section 21 and a frustum section connected to the bottom of the cylindrical section 21; the hydrocyclone can also be a multi-section type, consisting of the cylindrical section 21 and two or more frustum sections with different cone angles, with the cylindrical section 21 connected to the frustum section with the larger cone angle, and the frustum section with the smallest cone angle connected to the return pipe 20. Figure 2 As shown, the hydrocyclone 2 is composed of a cylindrical section 2121, a first frustum section 22, and a second frustum section 23. The cone angle of the second frustum section 23 is smaller than that of the first frustum section 22, thereby achieving efficient gas-liquid separation.

[0037] The hydrogen collection system structure of the application is simple, and can efficiently collect and purify hydrogen, improve the purity of hydrogen, can be directly used, and reduces resource waste.

[0038] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0039] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] In the description of the specification, the description of the terms "the embodiment", "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in at least one embodiment or example. In addition, those skilled in the art can combine and combine the different embodiments or features of different embodiments or examples described in the specification without contradiction.

[0041] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0042] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and simple improvement made on the essential content of the present application shall be included in the protection scope of the present application.

Claims

1. An aluminum-air fuel cell hydrogen collection system, characterized by, The aluminum-air fuel cell unit (1), a gas-liquid separator (2), a water tank (3), a gas washing bottle (4) and a vacuum pump (5) are included, The liquid outlet of the stack (11) of the aluminum-air fuel cell unit (1) is communicated with the liquid inlet of the gas-liquid separator (2) through a liquid discharge pipe (6), The gas outlet of the gas-liquid separator (2) is connected with a gas discharge pipe (7), the other end of the gas discharge pipe (7) extends into the gas washing bottle (4), The gas washing bottle (4) is inverted in the water tank (3), the gas washing bottle (4) is filled with water, and the bottle opening of the gas washing bottle (4) is below the liquid level in the water tank (3), The upper part of the gas washing bottle (4) is provided with a gas outlet, the gas outlet is connected with a collecting pipe (8), the vacuum pump (5) is arranged on the collecting pipe (8), and the end of the collecting pipe (8) away from the gas washing bottle (4) is connected with a gas collecting container.

2. The aluminum-air fuel cell hydrogen gas collection system of claim 1, wherein, An automatic collection unit is further included, the automatic collection unit includes a controller, an upper liquid level sensor (9) and a lower liquid level sensor (10), the upper liquid level sensor (9) and the lower liquid level sensor (10) are arranged in the gas washing bottle (4), the upper liquid level sensor (9) is located above the lower liquid level sensor (10), and the vacuum pump (5), the upper liquid level sensor (9) and the lower liquid level sensor (10) are electrically connected with the controller respectively.

3. The aluminum-air fuel cell hydrogen gas collection system of claim 1, wherein, A branch emptying pipe (81) is branched on the collecting pipe (8), a reversing valve (82) is arranged at the communication position of the collecting pipe (8) and the emptying pipe (81), and the vacuum pump (5) is arranged between the gas washing bottle (4) and the reversing valve (82).

4. The aluminum-air fuel cell hydrogen gas collection system of any one of claims 1-3, wherein, The gas-liquid separator (2) is a cyclone.

5. The aluminum-air fuel cell hydrogen gas collection system of claim 4, wherein, The cyclone includes a cylindrical section (21) and one or more circular truncated cone sections connected to the bottom of the cylindrical section (21), and the plurality of circular truncated cone sections are connected in sequence along the axial direction.

6. The aluminum-air fuel cell hydrogen gas collection system of claim 1, wherein, The liquid outlet of the gas-liquid separator (2) is connected with the electrolyte tank (12) of the aluminum-air fuel cell unit (1) through a liquid return pipe (20).

7. The aluminum-air fuel cell hydrogen gas collection system of claim 6, wherein, A one-way valve is arranged on the liquid return pipe (20) and leads to the electrolyte tank (12).

8. The aluminum-air fuel cell hydrogen gas collection system of claim 6 or 7, wherein, A balance valve (14) is arranged on the top of the electrolyte tank (12).

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