A processing apparatus for fuel cell production

Abstract

The application discloses a processing equipment for fuel cell production and relates to the technical field of cell processing. The processing equipment comprises a tank body and a stirring mechanism. The top of the tank body is provided with a top cover. The stirring mechanism is installed on the top cover and is used for stirring slurry in the tank body. The tank wall of the tank body near the top is provided with an outwardly convex capacity expansion layer. The tank body and the capacity expansion layer are provided with an agglomeration treatment mechanism for treating agglomerated particles in the slurry. The agglomerated slurry at the bottom of the tank body is pushed into a conveying cylinder by a pushing plate, is transported upwards to the top by an auger blade, and is crushed by a pressing and twisting plate. The agglomerated material floating on the liquid surface and close to the tank wall is pushed to move to the center of the liquid surface by the slurry sprayed by a material spraying pipe and enters a high shear area of a stirring blade to participate in stirring and mixing. The up-down combination and circulation treatment mode effectively removes the agglomeration phenomenon during the stirring of the slurry, makes the mixing of the catalyst slurry more uniform, and improves the product quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery processing, in particular to a processing equipment for fuel cell production. BACKGROUND

[0002] Fuel cell production process involves multiple key links, mainly including the production and assembly of hydrogen fuel cell stack, the preparation of membrane electrode (MEA), the production of bipolar plate, etc. The preparation method of MEA mainly has GDE preparation method and CCM preparation method. At present, CCM preparation method is the mainstream way of commercial application, and its process flow includes catalyst slurry preparation, catalyst coating and drying, thermal transfer printing and sealing frame processing.

[0003] Among them, when preparing the catalyst slurry, the catalyst (such as Pt-C), deionized water, organic solvent and binder are mixed and stirred in a certain proportion to form a slurry. The existing stirrer is prone to the following agglomeration phenomenon when preparing the catalyst slurry:

[0004] 1. The area near the stirring paddle is a high shear zone, and the particles are difficult to agglomerate under the action of strong shear force. The area far away from the paddle (such as the top or bottom of the tank) is a low shear zone, and the particles are easy to gather due to van der Waals force or electrostatic action;

[0005] 2. If the particle density in the slurry is uneven (such as the density difference between the catalyst and the carbon carrier is >0.5g / cm 3 ), the heavy particles are easy to settle at the bottom of the tank, and the light particles may float to the liquid surface, forming stratified agglomeration;

[0006] The agglomeration phenomenon during catalyst slurry preparation will affect the local concentration of the slurry and will affect the quality of the catalyst coating in the later stage, thereby indirectly affecting the charge-discharge performance and service life of the final product fuel cell. Therefore, a processing equipment for fuel cell production is proposed. SUMMARY

[0007] The purpose of the present application is to solve the problems in the prior art and provide a processing equipment for fuel cell production.

[0008] A processing equipment for fuel cell production, comprising a tank body and a stirring mechanism, a top cover is installed on the top of the tank body, the stirring mechanism is installed on the top cover and is used for stirring the slurry in the tank body, an outwardly convex expansion layer is arranged on the tank wall near the top of the tank body, and an agglomeration treatment mechanism is arranged on the tank body and the expansion layer for treating the agglomerated particles in the slurry;

[0009] The first annular cylinder wall and the second annular cylinder wall are connected by a plurality of connecting blocks, and a spray pipe is sealingly connected between the first annular cylinder wall and the second annular cylinder wall.

[0010] Preferably, the stirring mechanism comprises a first motor and a stirring shaft, the stirring shaft is rotationally connected to the center of the top cover, the first motor is mounted on the top cover and the output shaft is coaxially connected to the stirring shaft, a plurality of stirring blades are connected to the lower end of the stirring shaft, and a pushing plate is connected to the bottom of the stirring shaft.

[0011] Preferably, a first gear is coaxially connected to the upper end of the stirring shaft, a rotating ring is rotationally connected to the bottom surface of the top cover around the stirring shaft, a gear ring is coaxially connected to the inner ring of the rotating ring, a second gear is rotationally connected to the bottom surface of the top cover, the second gear is engaged with the first gear and the gear ring at the same time, and a plurality of connecting rods are connected to the outer ring of the rotating ring in an annular array, and one end of each connecting rod away from the rotating ring is connected to the first annular cylinder wall.

[0012] Preferably, the agglomeration treatment mechanism comprises a conveying cylinder and a second motor, the conveying cylinder is mounted on the outer wall of the tank body, an opening is formed in the bottom of the tank body and a material guide box is connected to the opening, the lower end of the material guide box is connected to the bottom end of the conveying cylinder, the second motor is mounted on the bottom of the conveying cylinder, the output shaft of the second motor extends into the conveying cylinder and is coaxially connected to a rotating shaft, auger blades are connected to the rotating shaft, a twisting plate is connected to the top end of the rotating shaft, a filter screen section is arranged at the upper end position of the conveying cylinder, a material containing cylinder is connected to the outer wall of the conveying cylinder at the region where the filter screen section is located, a slurry pump is mounted on the outer wall of the tank body, a material guide pipe and a feeding pipe are respectively connected to the liquid inlet and the liquid outlet of the slurry pump, one end of the material guide pipe away from the slurry pump is in communication with the bottom of the material containing cylinder, and one end of the feeding pipe away from the slurry pump is in communication with the expansion layer of the tank body.

[0013] Preferably, a lifting block is sealingly and slidingly connected to the top of the conveying cylinder, a spring is connected to the top of the lifting block, the upper end of the spring is connected to the top of the conveying cylinder, an indicating rod is connected to the center of the top of the lifting block, and a notch is formed in the top of the conveying cylinder for the indicating rod to extend out of the conveying cylinder.

[0014] Preferably, the height of the twisting plate is less than the length of the filter screen section at the top of the conveying cylinder.

[0015] Preferably, a plurality of supporting legs are connected to the outer wall of the bottom of the tank body, a discharging port is arranged at the bottom of the tank body, and a feeding port is arranged at the top of the top cover.

[0016] Compared with the prior art, the present application has the advantages of:

[0017] 1、The present application is provided with agglomeration treatment mechanism, for the agglomeration slurry at the bottom of the tank, the push plate is used to push it into the transport cylinder, and it is transported upward to the top by the auger blade, and then it is crushed by the twisting plate, for the agglomeration material floating on the liquid surface and close to the tank wall, the slurry sprayed by the material spraying pipe is used to push it to the center of the liquid surface to enter the high shear area of the stirring blade to participate in stirring and mixing, and this kind of up and down combination and circulating treatment mode effectively removes the agglomeration phenomenon during stirring of the slurry, so that the catalyst slurry mixing is more uniform, and the product quality is improved.

[0018] 2、The present application is provided with agglomeration treatment mechanism, for the agglomeration slurry at the bottom of the tank, the push plate is used to push it into the transport cylinder, and it is transported upward to the top by the auger blade, and then it is crushed by the twisting plate, for the agglomeration material floating on the liquid surface and close to the tank wall, the slurry sprayed by the material spraying pipe is used to push it to the center of the liquid surface to enter the high shear area of the stirring blade to participate in stirring and mixing, and this kind of up and down combination and circulating treatment mode effectively removes the agglomeration phenomenon during stirring of the slurry, so that the catalyst slurry mixing is more uniform, and the product quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the present application.

[0020] Figure 2 It is a structural sectional view of the present application.

[0021] Figure 3 It is Figure 2 It is an enlarged schematic view of A in the middle.

[0022] Figure 4 It is a structural sectional view of the tank expansion layer part in the present application.

[0023] Figure 5 It is a structural sectional view of the transport cylinder part in the present application.

[0024] Figure 6 It is Figure 5 It is an enlarged schematic view of B in the middle.

[0025] In the drawing: 1 tank, 11 expansion layer, 12 supporting leg, 13 discharge port, 2 top cover, 21 feeding port, 3 stirring mechanism, 31 first motor, 32 stirring shaft, 33 stirring blade, 34 push plate, 35 first gear, 36 rotating ring, 37 second gear, 38 gear ring, 39 connecting rod, 4 agglomeration treatment mechanism, 41 transport cylinder, 411 filter screen section, 42 material guide box, 43 rotating shaft, 431 auger blade, 432 twisting plate, 44 second motor, 45 material containing cylinder, 46 slurry pump, 461 material guide pipe, 462 feeding pipe, 47 lifting block, 471 spring, 472 indicating rod, 48 first annular cylinder wall, 481 connecting block, 49 second annular cylinder wall, 491 material spraying pipe. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0027] Referring to Figures 1-6 As shown in the figure, a processing equipment for fuel cell production includes a tank body 1 and a stirring mechanism 3, the top of the tank body 1 is provided with a top cover 2, the outer wall of the bottom of the tank body 1 is connected with a plurality of supporting legs 12, the bottom of the tank body 1 is provided with a discharge port 13, the top of the top cover 2 is provided with a feeding port 21, the stirring mechanism 3 is installed on the top cover 2 and is used for stirring the slurry in the tank body 1, the tank wall near the top of the tank body 1 is provided with an outwardly convex expansion layer 11, and the tank body 1 and the expansion layer 11 are provided with an agglomeration treatment mechanism 4 for treating the agglomerated particles in the slurry.

[0028] In this embodiment, the first annular cylinder wall 48 and the second annular cylinder wall 49 are sealingly and rotatably connected in the expansion layer 11, the inner diameter of the first annular cylinder wall 48 is the same as the inner diameter of the tank body 1, the diameter of the second annular cylinder wall 49 is larger than that of the first annular cylinder wall 48, a plurality of connecting blocks 481 are connected between the first annular cylinder wall 48 and the second annular cylinder wall 49, and a spraying pipe 491 is sealingly connected between the first annular cylinder wall 48 and the second annular cylinder wall 49.

[0029] In this embodiment, the stirring mechanism 3 includes a first motor 31 and a stirring shaft 32, the stirring shaft 32 is rotatably connected with the central position of the top cover 2, the first motor 31 is installed on the top cover 2 and the output shaft is coaxially connected with the stirring shaft 32, a plurality of stirring blades 33 are connected with the lower end of the stirring shaft 32, and a pushing plate 34 is connected with the bottom of the stirring shaft 32, the stirring blades 33 are downward pressing blades and push the material downward when stirring the slurry.

[0030] In this embodiment, a first gear 35 is coaxially connected with the upper end of the stirring shaft 32, a rotating ring 36 is rotatably connected with the bottom surface of the top cover 2 around the stirring shaft 32, a gear ring 38 is coaxially connected with the inner ring of the rotating ring 36, a second gear 37 is rotatably connected with the bottom surface of the top cover 2, the second gear 37 is engaged with the first gear 35 and the gear ring 38 at the same time, a plurality of connecting rods 39 are connected with the outer ring of the rotating ring 36 in an annular array, and one end of each connecting rod 39 away from the rotating ring 36 is connected with the first annular cylinder wall 48, when the first motor 31 is started to work, the rotating direction of the stirring shaft 32 is opposite to that of the first annular cylinder wall 48.

[0031] In the embodiment, the agglomeration treatment mechanism comprises a conveying cylinder 41 and a second motor 44, the conveying cylinder 41 is installed on the outer wall of the tank body 1, the bottom of the tank body 1 is provided with an opening and connected with a material guide box 42, the lower end of the material guide box 42 is connected with the bottom end of the conveying cylinder 41, the second motor 44 is installed at the bottom of the conveying cylinder 41, the output shaft of the second motor 44 extends into the conveying cylinder 41 and is coaxially connected with a rotating shaft 43, the rotating shaft 43 is connected with a screw blade 431, the top end of the rotating shaft 43 is connected with a twisting plate 432, the upper end of the conveying cylinder 41 is provided with a filter screen section 411, the outer wall of the conveying cylinder 41 and located in the area of the filter screen section 411 is connected with a material containing cylinder 45, the outer wall of the tank body 1 is installed with a slurry pump 46, the liquid inlet and the liquid outlet of the slurry pump 46 are respectively connected with a material guide pipe 461 and a feeding pipe 462, the end of the material guide pipe 461 away from the slurry pump 46 is in communication with the bottom of the material containing cylinder 45, the end of the feeding pipe 462 away from the slurry pump 46 is in communication with the expansion layer 11 of the tank body 1.

[0032] In the embodiment, the top of the conveying cylinder 41 is sealingly and slidably connected with a lifting block 47, the top of the lifting block 47 is connected with a spring 471, the upper end of the spring 471 is connected with the top of the conveying cylinder 41, the top center of the lifting block 47 is connected with an indicating rod 472, the top of the conveying cylinder 41 is provided with a notch for the indicating rod 472 to extend out of the conveying cylinder 41.

[0033] In the embodiment, the height of the twisting plate 432 is less than the length of the filter screen section 411 on the conveying cylinder 41.

[0034] The working process and principle of the application are as follows:

[0035] In use, the catalyst, deionized water, organic solvent and binder are put into the tank body 1 from the feeding port 21 according to a certain proportion, so that the overall slurry liquid surface is at the height of the area where the first annular cylinder wall 48 is located, the first motor 31 is turned on to drive the stirring blade 33 to rotate, and the catalyst slurry in the tank body 1 is stirred and mixed.

[0036] After stirring for a period of time, the slurry will appear to be agglomerated, and the agglomerated material is mainly distributed at the bottom of the tank 1 and on the liquid surface near the tank wall, and it is difficult to fully participate in mixing, at this time, the second motor 44 is started to drive the rotating shaft 43 to rotate, the agglomerated slurry at the bottom of the tank 1 is pushed by the pushing plate 34 to enter the transport cylinder 41, and is driven upward by the rotating auger blade 431, when the agglomerated slurry reaches the top of the transport cylinder 41, it is crushed by the twisting plate 432 and then flows into the material holding cylinder 45 through the filter screen segment 411, and then the slurry pump 46 is started to pump the slurry in the material holding cylinder 45 into the expansion layer 11 of the tank 1, under the pressure of the slurry pump 46, the slurry in the expansion layer 11 is sprayed from the material spraying pipe 491, when the slurry is sprayed, since the nozzle of the material spraying pipe 491 is flush with the liquid surface, the sprayed slurry pushes the agglomerated material floating on the liquid surface and near the tank wall to move towards the center of the liquid surface, and enters the high shear area of the rotating stirring blade 33 to participate in stirring and mixing, and the first annular cylinder wall 48 keeps rotating under the driving of the first motor 31, so the slurry continuously sprayed from the material spraying pipe 491 will move along the tank wall to continuously push the agglomerated material floating on the liquid surface and near the tank wall to move towards the center of the liquid surface, under the rotation of the downward pressing stirring blade 33, the agglomerated material is pushed downward to the bottom of the tank, in this process, part of the agglomerated material is broken in the high shear area of stirring, and the unbroken agglomerated material will be transported upward into the transport cylinder 41, and finally be crushed by the twisting plate 432, so as to effectively remove the agglomeration phenomenon of the slurry during stirring, and make the mixing of the catalyst slurry more uniform.

[0037] During the stirring and mixing of the slurry, since there is more agglomerated material in the early stage of stirring, when the agglomerated slurry is transported to the top of the transport cylinder 41, the mesh holes of the filter screen segment 411 are blocked by the agglomerated material, which will cause the liquid surface in the transport cylinder 41 to rise, so as to push the lifting block 47 to move upward and open more mesh holes of the filter screen segment 411 for the slurry to flow into the material holding cylinder 45, as the agglomerated material in the slurry in the tank 1 is broken and reduced, the mesh holes of the filter screen segment 411 are less blocked by the agglomerated material, the liquid surface height in the transport cylinder 41 will decrease, so that the lifting block 47 slides downward, and the staff can know the stirring condition in the tank 1 by observing the extension of the indicating rod 472, when the indicating rod 472 is completely retracted into the transport cylinder 41, it indicates that the agglomerated material in the slurry is basically processed, so as to facilitate the timely stop of the stirring work of the catalyst slurry, avoid excessive stirring of the catalyst slurry, and affect the quality of the catalyst slurry.

[0038] It is to be understood by those skilled in the art that the application can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are merely exemplary in all aspects and are not the only ones. All changes within the scope of the application or within the equivalent scope of the application are intended to be covered by the application.

Claims

1. A processing apparatus for fuel cell production, characterized by: The application relates to a slurry agglomerating device, which comprises a tank body (1) and a stirring mechanism (3), the top of the tank body (1) is provided with a top cover (2), the stirring mechanism (3) is arranged on the top cover (2) and used for stirring slurry in the tank body (1), a tank wall of the tank body (1) near the top is provided with an outwardly convex capacity expansion layer (11), and an agglomerating treatment mechanism (4) is arranged on the tank body (1) and the capacity expansion layer (11) and used for treating agglomerated particles in the slurry. The capacity expansion layer (11) is sealingly and rotatably connected with a first annular cylinder wall (48) and a second annular cylinder wall (49), the inner diameter of the first annular cylinder wall (48) is the same as the inner diameter of the tank body (1), the diameter of the second annular cylinder wall (49) is larger than that of the first annular cylinder wall (48), a plurality of connecting blocks (481) are connected between the first annular cylinder wall (48) and the second annular cylinder wall (49), and a material spraying pipe (491) is sealingly connected between the first annular cylinder wall (48) and the second annular cylinder wall (49). The agglomerating treatment mechanism comprises a conveying cylinder (41) and a second motor (44), the conveying cylinder (41) is arranged on the outer wall of the tank body (1), the bottom of the tank body (1) is provided with an opening and connected with a material guiding box (42), the lower end of the material guiding box (42) is connected with the bottom end of the conveying cylinder (41), the second motor (44) is arranged on the bottom of the conveying cylinder (41), the output shaft of the second motor (44) extends into the conveying cylinder (41) and coaxially connected with a rotating shaft (43), the rotating shaft (43) is connected with auger blades (431), the top end of the rotating shaft (43) is connected with a pressing and twisting plate (432), the upper end position of the conveying cylinder (41) is provided with a filter screen section (411), the outer wall of the conveying cylinder (41) and located in the region of the filter screen section (411) is connected with a material containing cylinder (45), the outer wall of the tank body (1) is arranged with a slurry pump (46), the liquid inlet and the liquid outlet of the slurry pump (46) are respectively connected with a material guiding pipe (461) and a material supplying pipe (462), the end of the material guiding pipe (461) far away from the slurry pump (46) is communicated with the bottom of the material containing cylinder (45), and the end of the material supplying pipe (462) far away from the slurry pump (46) is communicated with the capacity expansion layer (11) of the tank body (1). The top of the conveying cylinder (41) is sealingly and slidingly connected with a lifting block (47), the top of the lifting block (47) is connected with a spring (471), the upper end of the spring (471) is connected with the top of the conveying cylinder (41), the top center position of the lifting block (47) is connected with an indicating rod (472), and the top of the conveying cylinder (41) is provided with a notch for the indicating rod (472) to extend out of the conveying cylinder (41).

2. A processing apparatus for fuel cell production according to claim 1, characterized in that: The stirring mechanism (3) comprises a first motor (31) and a stirring shaft (32), the stirring shaft (32) is rotatably connected with the center position of the top cover (2), the first motor (31) is arranged on the top cover (2) and the output shaft is coaxially connected with the stirring shaft (32), the lower end of the stirring shaft (32) is connected with a plurality of stirring blades (33), and the bottom of the stirring shaft (32) is connected with a material pushing plate (34).

3. A processing apparatus for fuel cell production according to claim 2, wherein: The upper end of the stirring shaft (32) is coaxially connected with a first gear (35), the bottom surface of the top cover (2) is rotationally connected with a rotating ring (36) around the stirring shaft (32), the inner ring of the rotating ring (36) is coaxially connected with a gear ring (38), the bottom surface of the top cover (2) is rotationally connected with a second gear (37), the second gear (37) is engaged with the first gear (35) and the gear ring (38) at the same time, the outer ring of the rotating ring (36) is connected with a plurality of connecting rods (39) in an annular array, and the end of each connecting rod (39) away from the rotating ring (36) is connected with the first annular cylinder wall (48).

4. A processing apparatus for fuel cell production according to claim 1, characterized by: The height of the twisting plate (432) is less than the length of the filter screen section (411) on the conveying cylinder (41).

5. The processing apparatus for fuel cell production according to claim 1, wherein: The bottom outer wall of the tank body (1) is connected with a plurality of supporting legs (12), the bottom of the tank body (1) is provided with a discharge port (13), and the top of the top cover (2) is provided with a feeding port (21).

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