CN216288524U - Electrode sintering device for molten carbonate fuel cell - Google Patents
Electrode sintering device for molten carbonate fuel cell Download PDFInfo
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- CN216288524U CN216288524U CN202122885446.5U CN202122885446U CN216288524U CN 216288524 U CN216288524 U CN 216288524U CN 202122885446 U CN202122885446 U CN 202122885446U CN 216288524 U CN216288524 U CN 216288524U
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Abstract
The utility model relates to the technical field of high-temperature fuel cells, in particular to a sintering device for an electrode of a molten carbonate fuel cell, which comprises: a first sintering furnace; at least one second sintering furnace; the first tail gas absorption device is communicated between a first gas outlet of the first sintering furnace and a third gas inlet of the second sintering furnace or between a second gas outlet of the second sintering furnace at the previous stage and a third gas inlet of the second sintering furnace at the next stage; and the second tail gas absorption device is provided with an air inlet pipe communicated with the second air outlet of the second sintering furnace of the last stage and an air outlet pipe for exhausting air. According to the electrode sintering device for the molten carbonate fuel cell, in the electrode sintering process, hydrogen which is not fully utilized can continue to participate in reaction in the next-stage second sintering furnace after being treated by the first tail gas absorption device, so that the utilization rate of hydrogen gas is improved, and the cost is reduced.
Description
Technical Field
The utility model relates to the technical field of high-temperature fuel cells, in particular to a sintering device for an electrode of a molten carbonate fuel cell.
Background
As a novel power generation technology, the fuel cell has the advantages of no pollution, modular assembly and the like. The molten carbonate fuel cell as one kind of fuel cell belongs to the field of high temperature fuel cell, and compared with low temperature fuel cell, it has the advantages of wide fuel source, no need of noble metal as catalyst, high tail gas temperature, etc. and may be combined with gas turbine to generate power.
The molten carbonate fuel cell mainly comprises a bipolar plate, an electrode, a diaphragm and the like, wherein the electrode is used as a key material to provide functions of reaction, catalysis and the like for gas, and the preparation process is particularly key. The molten carbonate fuel cell electrode is composed of metallic nickel, the anode is metallic nickel, and the cathode is nickel oxide.
At present, the sintering process of the existing electrode mainly adopts two modes of sintering in a belt type sintering furnace and a traditional electrode atmosphere furnace, and the mode of sintering the electrode in the traditional atmosphere furnace has the defects of low hydrogen gas utilization rate and serious waste.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the utility model is to overcome the defects of low hydrogen gas utilization rate and serious waste in the prior art, thereby providing a sintering device for an electrode of a molten carbonate fuel cell.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
a sintering device for electrodes of a molten carbonate fuel cell comprises a first sintering furnace, a second sintering furnace and a third sintering furnace, wherein the first sintering furnace is provided with a first air inlet, a second air inlet and a first air outlet, and a first electrode frame for placing electrodes is arranged in the first sintering furnace; the at least one second sintering furnace is provided with a third air inlet and a second air outlet, and a second electrode frame for placing electrodes is arranged in the second sintering furnace; the first tail gas absorption device is communicated between a first gas outlet of the first sintering furnace and a third gas inlet of the second sintering furnace or between a second gas outlet of the second sintering furnace at the upper stage and a third gas inlet of the second sintering furnace at the lower stage, and is used for absorbing carbon dioxide and water vapor contained in tail gas generated by combustion; and the second tail gas absorption device is provided with an air inlet pipe communicated with the second air outlet of the second sintering furnace at the last stage and an air outlet pipe for discharging air, and is used for absorbing carbon dioxide and water vapor contained in the tail gas generated by combustion.
Further, the first air inlet is communicated with an air source or a nitrogen source through a first pipeline; the second gas inlet is communicated with a hydrogen source through a second pipeline.
Further, the first air inlet and the second air inlet are located below the first sintering furnace, and the first air outlet is located above the first sintering furnace.
Further, the first tail gas absorption device comprises a box body and soda lime particles arranged inside the box body.
Further, the height of the air inlet of the box body is lower than that of the air outlet of the box body.
Further, the third gas inlet is positioned below the second sintering furnace, and the second gas outlet is positioned above the second sintering furnace.
Further, the second tail gas absorption device comprises a tank body and a calcium hydroxide aqueous solution arranged in the tank body; the pipe orifices of the air inlet pipe are all sunk below the liquid level of the calcium hydroxide aqueous solution, and the pipe orifice of the air outlet pipe is higher than the liquid level of the calcium hydroxide aqueous solution.
Furthermore, a combustion device is arranged at the position of the pipe orifice of the air outlet pipe extending out of the tank body.
The technical scheme of the utility model has the following advantages:
1. the utility model provides a sintering device for an electrode of a molten carbonate fuel cell, which comprises a first sintering furnace with a first air inlet, a second air inlet and a first air outlet, wherein a first electrode frame for placing an electrode is arranged in the first sintering furnace; at least one second sintering furnace with a third air inlet and a second air outlet, wherein a second electrode frame for placing electrodes is arranged in the second sintering furnace; the first tail gas absorption device is used for absorbing carbon dioxide and water vapor contained in tail gas generated by combustion and communicated between a first gas outlet of the first sintering furnace and a third gas inlet of the second sintering furnace or between a second gas outlet of a first-stage second sintering furnace and a third gas inlet of a second sintering furnace of a next stage; the second tail gas absorption device is used for absorbing carbon dioxide and water vapor contained in tail gas generated by combustion, and is provided with an air inlet pipe communicated with a second air outlet of the second sintering furnace of the last stage and an air outlet pipe for exhausting air. In the electrode sintering process, hydrogen which is not fully utilized in the first sintering furnace can continue to participate in the reaction in the second sintering furnace of the next stage after being treated by the first tail gas absorption device, so that the utilization rate of hydrogen gas is improved, and the cost is reduced.
2. According to the electrode sintering device for the molten carbonate fuel cell, the first air inlet and the second air inlet are positioned below the first sintering furnace, and the first air outlet is positioned above the first sintering furnace; the third gas inlet is positioned below the second sintering furnace, the second gas outlet is positioned above the second sintering furnace, and the gas can fully participate in the reaction in the sintering furnace by the arrangement, so that the utilization rate of the gas is improved.
3. According to the electrode sintering device for the molten carbonate fuel cell, provided by the utility model, the first tail gas absorption device comprises a box body and soda lime particles arranged in the box body, and the ventilation rate is not influenced when carbon dioxide and water vapor in tail gas are absorbed; and the height of the air inlet of the box body is lower than that of the air outlet of the box body, so that carbon dioxide and water vapor in the tail gas can be fully absorbed.
4. The utility model provides a sintering device for an electrode of a molten carbonate fuel cell.A second tail gas absorption device comprises a tank body and a calcium hydroxide aqueous solution arranged in the tank body; the pipe orifices of the air inlet pipe are all sunk below the liquid level of the calcium hydroxide aqueous solution, and the pipe orifice of the air outlet pipe is higher than the liquid level of the calcium hydroxide aqueous solution, so that carbon dioxide in tail gas can be absorbed, and the emission of room-temperature gas is reduced.
5. According to the electrode sintering device for the molten carbonate fuel cell, the combustion device is arranged at the position of the pipe orifice of the air outlet pipe extending out of the cell body, so that residual hydrogen can be combusted, and hidden danger is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of the overall structure of a sintering apparatus for an electrode of a molten carbonate fuel cell according to the present invention.
Description of reference numerals: 1. a first air inlet; 2. a second air inlet; 3. a first sintering furnace; 4. a first electrode holder; 5. a first air outlet; 6. a first tail gas absorption device; 7. a third air inlet; 8. a second sintering furnace; 9. a second electrode holder; 10. a second air outlet; 11. a second tail gas absorption device; 12. and an air outlet pipe.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1, the electrode sintering apparatus for molten carbonate fuel cell provided by the present invention comprises a first sintering furnace 3 having a first gas inlet 1, a second gas inlet 2 and a first gas outlet 5, and a first electrode holder 4 for holding an electrode therein; at least one second sintering furnace 8 with a third air inlet 7 and a second air outlet 10, wherein a second electrode frame 9 for placing electrodes is arranged in the second sintering furnace; the first tail gas absorption device 6 is used for absorbing carbon dioxide and water vapor contained in tail gas generated by combustion and communicated between a first gas outlet 5 of the first sintering furnace 3 and a third gas inlet 7 of the second sintering furnace 8 or between a second gas outlet 10 of the second sintering furnace 8 at the upper stage and a third gas inlet 7 of the second sintering furnace 8 at the lower stage; and the second tail gas absorption device 11 is used for absorbing carbon dioxide and water vapor contained in the tail gas generated by combustion, and is provided with an air inlet pipe and an air outlet pipe 12 for discharging air, wherein the air inlet pipe is communicated with the second air outlet 10 of the second sintering furnace 8 at the last stage.
The working principle of the electrode sintering device for the molten carbonate fuel cell is as follows: the electrode blank is placed in a first electrode frame 4 and a second electrode frame 9, a first sintering furnace 3 starts to heat up, air and nitrogen are continuously introduced into a first air inlet 1 in the heating process, hydrogen is introduced into a second air inlet 2, after organic matters in the electrode blank are combusted, tail gas is discharged through a first air outlet 5, carbon dioxide and water vapor in the tail gas are absorbed by the discharged tail gas and air which does not participate in reaction through a first tail gas absorption device 6, the rest tail gas enters a second sintering furnace 8 through a third air inlet 7 to be sintered, and the roasted tail gas is discharged from an air outlet pipe 12 after the second air outlet 10 is introduced into a second tail gas absorption device 11 through the air inlet.
In this embodiment, as shown in fig. 1, the first gas inlet 1 is communicated with an air source or a nitrogen source through a first pipeline, the second gas inlet 2 is communicated with a hydrogen source through a second pipeline, the first gas inlet 1 and the second gas inlet 2 are located below the first sintering furnace 3, the first gas outlet 5 is located above the first sintering furnace 3, the third gas inlet 7 is located below the second sintering furnace 8, and the second gas outlet 10 is located above the second sintering furnace 8.
The tail gas of 5 exhaust of first gas outlets gets into the box of first tail gas absorbing device 6 through the air inlet, the soda lime granule that sets up in the box can absorb carbon dioxide and vapor in the tail gas, because soda lime is the graininess, the in-process that lets in at tail gas can not reduce gaseous rate of ventilating, can guarantee that the tail gas after the processing satisfies the reaction of second fritting furnace 8, the air inlet height of box is less than the gas outlet height of box, can make carbon dioxide and vapor in the tail gas fully absorbed at the in-process that rises.
Tail gas discharged from the second gas outlet 10 enters a groove body of a second tail gas absorption device 11 through a gas inlet pipe, and carbon dioxide in the tail gas can be absorbed by calcium hydroxide aqueous solution in the groove body, so that the emission of greenhouse gas is reduced; the pipe orifice of the air inlet pipe of the second tail gas absorption device 11 is sunk below the liquid level of the calcium hydroxide aqueous solution, and the pipe orifice of the air outlet pipe 12 is higher than the liquid level of the calcium hydroxide aqueous solution, so that the absorption rate of carbon dioxide can be increased.
A combustion device is arranged at the position of the pipe orifice of the air outlet pipe 12 outside the groove body of the second tail gas absorption device 11, so that residual hydrogen can be combusted, and hidden danger is avoided.
In summary, in the electrode sintering apparatus for molten carbonate fuel cell according to the present invention, the first gas inlet 1 is communicated with an air source or a nitrogen source through a first pipeline, the second gas inlet 2 is communicated with a hydrogen source through a second pipeline, the first gas inlet 1 and the second gas inlet 2 are located below the first sintering furnace 3, and the first gas outlet 5 is located above the first sintering furnace 3.
In the electrode preparation process, firstly, electrode blanks are placed in a first electrode frame 4 and a second electrode frame 9, then a first sintering furnace 3 starts to heat up, the heating rate is 3 ℃/min, and the target temperature is 500 ℃; in the temperature rise process, air is continuously introduced into the first air inlet 1, the air flow is v1, tail gas generated by burning organic matters in the electrode blank is discharged through the first air outlet 5, the tail gas discharged from the first air outlet 5 enters the box body of the first tail gas absorption device 6 through the air inlet, carbon dioxide and water vapor in the tail gas can be absorbed by soda lime particles arranged in the box body, the ventilation rate of the gas cannot be reduced in the introduction process of the tail gas due to the fact that the soda lime particles are granular, the tail gas after treatment can be guaranteed to meet the reaction of the second sintering furnace 8, the height of the air inlet of the box body is lower than that of the air outlet of the box body, and the carbon dioxide and the water vapor in the tail gas can be fully absorbed in the rising process.
The gas outlet of the box body is communicated with the third gas inlet 7, the residual tail gas enters the second sintering furnace 8 to roast the electrode on the second motor frame 9 inside, the tail gas discharged from the second gas outlet 10 enters the groove body of the second tail gas absorption device 11 through the gas inlet pipe, and the calcium hydroxide aqueous solution in the groove body can absorb the carbon dioxide in the tail gas, so that the emission of greenhouse gas is reduced; the pipe orifice of the air inlet pipe of the second tail gas absorption device 11 is sunk below the liquid level of the calcium hydroxide aqueous solution, and the pipe orifice of the air outlet pipe 12 is higher than the liquid level of the calcium hydroxide aqueous solution, so that the absorption rate of carbon dioxide can be increased.
When the temperature of the first sintering furnace 3 is raised to 500 ℃, the first air inlet 1 stops the introduction of air, and nitrogen is introduced to sweep the internal air so as to discharge the air in the electrode sintering furnace. After the air is discharged, hydrogen is introduced through the second air inlet 2, the temperature of the sintering furnace is continuously raised to 850 ℃, the heating rate is 3 ℃/min, reduction treatment of the electrode is carried out, a combustion device is arranged at the position of the pipe orifice of the air outlet pipe 12 outside the groove body of the second tail gas absorption device 11, the hydrogen which does not participate in reduction is combusted and then discharged into the atmosphere, and hidden danger is avoided.
And when the temperature of the electrode sintering furnace reaches 850 ℃, cooling, continuously introducing hydrogen through the second air inlet 2 in the cooling process, and changing the hydrogen into nitrogen when the temperature is reduced to 500 ℃ to perform gas protection on the electrode.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (8)
1. An apparatus for sintering an electrode of a molten carbonate fuel cell, comprising:
the first sintering furnace (3) is provided with a first air inlet (1), a second air inlet (2) and a first air outlet (5), and a first electrode rack (4) for placing electrodes is arranged in the first sintering furnace;
at least one second sintering furnace (8) provided with a third air inlet (7) and a second air outlet (10), and a second electrode frame (9) for placing electrodes is arranged in the second sintering furnace;
the first tail gas absorption device (6) is communicated between a first gas outlet (5) of the first sintering furnace (3) and a third gas inlet (7) of the second sintering furnace (8) or between a second gas outlet (10) of the second sintering furnace (8) at the upper stage and a third gas inlet (7) of the second sintering furnace (8) at the lower stage, and is used for absorbing carbon dioxide and water vapor contained in tail gas generated by combustion;
and the second tail gas absorption device (11) is provided with an air inlet pipe communicated with the second air outlet (10) of the second sintering furnace (8) at the last stage and an air outlet pipe (12) for exhausting air, and is used for absorbing carbon dioxide and water vapor contained in tail gas generated by combustion.
2. The molten carbonate fuel cell electrode sintering apparatus according to claim 1, wherein the first gas inlet (1) is communicated with a source of air or nitrogen gas through a first pipe; the second gas inlet (2) is communicated with a hydrogen source through a second pipeline.
3. The molten carbonate fuel cell electrode sintering apparatus according to claim 1, wherein the first gas inlet (1) and the second gas inlet (2) are located below the first sintering furnace (3), and the first gas outlet (5) is located above the first sintering furnace (3).
4. A molten carbonate fuel cell electrode sintering apparatus in accordance with claim 1, characterised in that the first off-gas absorbing means (6) comprises a box and soda lime particles arranged inside the box.
5. The molten carbonate fuel cell electrode sintering apparatus according to claim 4, wherein the height of the gas inlet of the casing is lower than the height of the gas outlet of the casing.
6. The molten carbonate fuel cell electrode sintering apparatus according to claim 1, wherein the third gas inlet (7) is located below the second sintering furnace (8), and the second gas outlet (10) is located above the second sintering furnace (8).
7. The molten carbonate fuel cell electrode sintering apparatus according to claim 1, wherein the second off-gas absorption device (11) comprises a tank and an aqueous calcium hydroxide solution disposed in the tank; the pipe orifices of the air inlet pipe are all sunk below the liquid level of the calcium hydroxide aqueous solution, and the pipe orifice of the air outlet pipe (12) is higher than the liquid level of the calcium hydroxide aqueous solution.
8. The apparatus for sintering molten carbonate fuel cell electrodes according to claim 7, wherein the outlet duct (12) is provided with a burner at the position of the duct opening extending outside the cell body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122885446.5U CN216288524U (en) | 2021-11-23 | 2021-11-23 | Electrode sintering device for molten carbonate fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122885446.5U CN216288524U (en) | 2021-11-23 | 2021-11-23 | Electrode sintering device for molten carbonate fuel cell |
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| CN216288524U true CN216288524U (en) | 2022-04-12 |
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| CN202122885446.5U Active CN216288524U (en) | 2021-11-23 | 2021-11-23 | Electrode sintering device for molten carbonate fuel cell |
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