CN111841440A - Drying and screening device and drying and screening equipment - Google Patents
Drying and screening device and drying and screening equipment Download PDFInfo
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- CN111841440A CN111841440A CN201910344571.XA CN201910344571A CN111841440A CN 111841440 A CN111841440 A CN 111841440A CN 201910344571 A CN201910344571 A CN 201910344571A CN 111841440 A CN111841440 A CN 111841440A
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- 238000001035 drying Methods 0.000 title claims abstract description 149
- 238000012216 screening Methods 0.000 title claims abstract description 109
- 239000000463 material Substances 0.000 claims abstract description 59
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- 238000009690 centrifugal atomisation Methods 0.000 claims abstract description 7
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
- B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/08—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to weight
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
- B04C2009/002—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external filters
Abstract
The invention relates to a drying and screening device and drying and screening equipment. The drying and screening device comprises: the bottom of the drying tower is provided with a material outlet; the centrifugal atomization ejector is arranged at the top of the drying tower; granule screening pipeline has feed inlet and discharge gate, granule screening pipeline has vertical section and main part section, vertical section and main part section distribute in succession between feed inlet and discharge gate, granule screening pipeline is connected with the drying tower through the main part section, vertical section is located the drying tower and extends towards the material export, the feed inlet sets up in vertical section and towards the material export, the discharge gate sets up in the main part section, the feed inlet is relative with the material export and the interval sets up on vertical direction, the discharge gate exposes the drying tower setting. The drying and screening device provided by the embodiment of the invention has the advantages of good separation effect, effective simplification of processing procedures and high production efficiency.
Description
Technical Field
The invention relates to the technical field of drying and screening of particulate matters, in particular to a drying and screening device and drying and screening equipment.
Background
The newly developed battery material needs to be dried after uniformly mixing the raw materials and the additive by using a dispersing agent. Conventionally, in the drying step, the slurry after mixing is usually dried by using a spray drying apparatus. The spray drying method is a production method which atomizes slurry with certain concentration and then uniformly mixes the slurry with hot gas, and processes the slurry into granular dry preparations. The method has the characteristics of simple process, low cost, easy popularization and the like. However, the existing spray drying device can only atomize and dry the slurry to obtain particles, then the particles are all discharged from a discharge port of the spray drying device, and then other screening equipment is used to obtain qualified powder meeting the process requirements, so that the traditional drying and screening process is complicated and the efficiency is low.
Disclosure of Invention
The embodiment of the invention provides a drying and screening device and drying and screening equipment. The drying and screening device has good separation effect, effectively simplifies the processing procedures and has high production efficiency.
In one aspect, an embodiment of the present invention provides a drying and screening device, including:
the bottom of the drying tower is provided with a material outlet; the centrifugal atomization ejector is arranged at the top of the drying tower; granule screening pipeline has feed inlet and discharge gate, granule screening pipeline has vertical section and main part section, vertical section and main part section distribute in succession between feed inlet and discharge gate, granule screening pipeline is connected with the drying tower through the main part section, vertical section is located the drying tower and extends towards the material export, the feed inlet sets up in vertical section and towards the material export, the discharge gate sets up in the main part section, the feed inlet is relative with the material export and the interval sets up on vertical direction, the discharge gate exposes the drying tower setting.
According to one aspect of an embodiment of the present invention, a particle screening pipe includes a first pipe having an extension pipe section disposed in a drying tower and extending in a vertical direction, and a second pipe movably sleeved to the extension pipe section in the vertical direction, the extension pipe section and the second pipe being configured into a vertical section; the feed inlet sets up in the second pipe fitting, through removing the second pipe fitting along vertical direction, adjusts the distance between feed inlet and the material export.
According to an aspect of an embodiment of the present invention, the extension pipe section and one end of the second pipe member are threadedly connected; alternatively, the extension pipe section and the second pipe section are sealingly connected.
According to one aspect of the embodiment of the invention, the extension pipe section is slidably connected with the second pipe member, and the second pipe member is locked to the extension pipe section by the locking member.
According to an aspect of the embodiment of the invention, the extension pipe section is sleeved outside the second pipe, and the locking member is in threaded connection with the extension pipe section and abuts against the outer peripheral surface of the second pipe.
According to an aspect of an embodiment of the present invention, the drying tower has a cylindrical body extending in a vertical direction, the cylindrical body includes a conical section having a large mouth and a small mouth, the small mouth of the conical section is a material outlet, the second pipe has a cylindrical central hole, and an opening of the cylindrical central hole is a material inlet.
According to one aspect of the embodiment of the invention, the feed inlet is circular or regular polygon, the material outlet is circular or regular polygon, and the center of the feed inlet and the center of the material outlet are arranged opposite to each other in the vertical direction.
According to an aspect of an embodiment of the invention, the ratio of the area of the feed opening to the area of the material outlet is 0.05 to 0.5.
According to an aspect of an embodiment of the present invention, the drying tower has a cylindrical body extending in a vertical direction, the cylindrical body having an access opening provided corresponding to the vertical section in a horizontal direction, and a sealing plate sealingly connected to the cylindrical body to cover or open the access opening.
According to an aspect of an embodiment of the present invention, the drying tower has a cylindrical body extending in a vertical direction, the cylindrical body including a conical section having a large mouth and a small mouth and a cylindrical section disposed above the conical section, the drying tower further including a first air supplement part connected to the cylindrical section and a second air supplement part connected to the conical section.
According to the drying and screening device provided by the embodiment of the invention, feed liquid is atomized and sprayed into the drying tower through the centrifugal atomization sprayer and forms atomized liquid beads. Then the atomized liquid beads are quickly dried and solidified in a drying tower filled with dry gas to form particles. When the particles move to the bottom of the drying tower, the particles reaching the preset weight and smaller than the preset weight can move upwards under the action of airflow in the drying tower and enter the vertical section of the particle screening pipeline, then enter the main body section and finally are discharged from the discharge hole, and the particles with the self weight larger than the preset weight can continuously descend and finally are discharged from the material outlet at the bottom of the drying tower. Therefore, the embodiment of the invention screens the particulate matters generated by completing the granulation work in the drying tower through the particle screening pipeline so as to separate the particulate matters meeting the preset weight and smaller than the preset weight from the particulate matters not meeting the preset weight, thereby improving the separation efficiency of unqualified particulate matters and qualified particulate matters and improving the separation effect. The drying and screening device provided by the embodiment of the invention can atomize and dry the slurry to obtain the particulate matter, and directly screen the particulate matter, so that the processing procedure is effectively simplified, the production efficiency is high, additional screening equipment does not need to be matched, and the production cost is reduced.
In another aspect, there is provided in accordance with an embodiment of the present invention a drying and screening apparatus, including:
a dry screening device as in the previous embodiment; a cyclone separator disposed downstream of the drying tower; the particle screening pipeline is communicated with the inner space of the cyclone separator through a discharge hole; the cyclone receives the particles discharged from the discharge port and screens the particles.
According to another aspect of the embodiment of the invention, the drying and screening device further comprises a dust remover, the dust remover is connected with the cyclone separator, and the dust remover comprises a dust removing tower, an air storage tank connected with the dust removing tower, an on-off control valve used for controlling the communication or cut-off of the air storage tank and the dust removing tower, and an air inlet valve connected with the air storage tank.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below by referring to the accompanying drawings.
FIG. 1 is a schematic diagram of a dry screening apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of a dry screening apparatus according to one embodiment of the present invention;
FIG. 3 is a schematic top view of a portion of a drying and screening device according to one embodiment of the present invention;
FIG. 4 is a schematic illustration of a partial structure of a drying and screening device according to another embodiment of the present invention;
FIG. 5 is a schematic illustration of a portion of a dry screening apparatus according to yet another embodiment of the present invention;
figure 6 is a schematic diagram of a dry screening apparatus according to one embodiment of the present invention.
In the drawings, the drawings are not necessarily to scale.
Description of the labeling:
10. a drying and screening device; 11. a drying tower; 111. a material outlet; 112. a cylindrical main body; 112a, a conical section; 112b, a cylindrical section; 113. an entrance and an exit; 114. a sealing plate; 115. a first air supplement component; 116. a second air supplement component; 12. a centrifugal atomizing injector; 13. a particle screening conduit; 13a, a feed inlet; 13b, a discharge hole; 130. a first pipe member; 130a, an extension pipe section; 131. a second pipe member; 132. a locking member; 14. a main body section; 15. a vertical section; 16. a discharge valve;
20. drying and screening equipment; 21. a cyclone separator; 22. a dust remover; 220. a dedusting tower; 221. a gas storage tank; 222. switching the control valve; 223. an intake valve;
99. a fan;
x, vertical direction.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the described embodiments.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "leading," "trailing," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The following description is given with reference to the orientation words as shown in the drawings, and is not intended to limit the specific structure of the present invention. In the description of the present invention, it should also 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; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
For a better understanding of the present invention, embodiments of the present invention are described in detail below with reference to fig. 1 to 6.
Referring to fig. 1, the embodiment of the present invention provides a drying and screening device 10 including a drying tower 11, a centrifugal atomizing injector 12, and a particle screening pipe 13.
Aiming at the newly developed battery material, a dispersing agent is required to be used for uniformly mixing the raw materials and the additive to form a prefabricated feed liquid. The centrifugal atomizing injector 12 of the present embodiment can adjust the pressure, flow rate and size of the spray holes of the feed liquid centrifugal atomizing injector 12 according to the process requirements. The centrifugal atomizing injector 12 can atomize the feed liquid so that the feed liquid can be contacted with hot gas to be rapidly dried to form particles. Optionally, the centrifugal atomizing injector 12 includes an atomizing injection pump and a mounting base. Centrifugal atomizing injector 12 is fixed in drying tower 11 through the installation base installation through atomizing jet pump centrifugal atomization feed liquid.
The drying tower 11 of this embodiment is a device that can perform drying and granulation. The drying tower 11 has a top, a bottom and a material outlet 111 provided at the bottom. The external gas is filtered and heated and enters a gas distributor at the top of the drying tower 11. In one example, external air is delivered into the drying tower 11 by a fan 99. The hot gas entering the drying tower 11 flows spirally downward in a vertical direction X from the top towards a bottom material outlet 111. The feed liquid is sprayed and atomized into ultrafine atomized liquid beads through a centrifugal atomization sprayer 12 arranged at the top of the drying tower 11. The atomized liquid beads can be in parallel flow contact with hot gas in the drying tower 11 and dried into spherical particle finished products with different self weights in a very short time, so that the granulation work is completed. The particles move with the air stream towards the bottom of the drying tower 11 under the action of the air stream and its own weight.
Referring to fig. 2, a particle screening duct 13 according to an embodiment of the present invention has an inlet 13a and an outlet 13 b. The particle screening conduit 13 has a main section 14 and a vertical section 15. The vertical section 15 and the main body section 14 are distributed one after the other between the inlet opening 13a and the outlet opening 13 b. The inlet opening 13a is arranged in the vertical section 15 and faces the material outlet 111, while the outlet opening 13b is arranged in the main section 14. The vertical section 15 is located within the drying tower 11 and extends towards the material outlet 111. The vertical section 15 extends a predetermined distance above the material outlet 111. The feed ports 13a are opposed to the material outlet 111 and spaced apart in the vertical direction X. The particle screening pipe 13 is hermetically connected with the drying tower 11 through the main body section 14, and the discharge port 13b is exposed outside the drying tower 11.
The drying tower 11 and the particle screening pipe 13 of the present embodiment can jointly screen the granulated particles to screen out a predetermined weight and less than the predetermined weight of the particles from all the particles. Herein, the predetermined weight and less than the predetermined weight of particulate matter may also be referred to as screened particulate matter. The particulate matter of more than the predetermined weight is discharged out of the drying tower 11 through the material outlet 111 to be collected. In one embodiment, dry screening device 10 further includes a discharge valve 16 and a collector coupled to drying tower 11. The discharge valve 16 is disposed below the material outlet 111. After the discharge valve 16 is opened, the material will enter the collector through the material outlet 111 and the discharge valve 16. In one embodiment, the pressure of the air flow in the drying tower 11 is at a stable value during the particle screening process, so that the air flow can lift the particles with the predetermined weight value and less than the predetermined weight value, and can lift the particles with the predetermined weight value and less than the predetermined weight value by a predetermined height, which is beneficial to improve the screening precision. In this embodiment, since the feeding port 13a of the particle sieving pipe 13 is spaced from the material outlet 111 of the drying tower 11 by the predetermined distance H, the particles with the predetermined weight and less than the predetermined weight enter the particle sieving pipe 13 from the feeding port 13a under the lifting action of the air flow in the drying tower 11 and are discharged from the discharging port 13b of the particle sieving pipe 13, so that the particle sieving operation is completed through the particle sieving pipe 13.
The vertical section 15 of the particle screening duct 13 of the present embodiment extends in a vertical direction X. The centre bore of vertical section 15 can form accommodation space and the buffer space of sufficient length, and the particulate matter of being sieved can be followed vertical direction X and is gone up the removal under the air current effect to can guarantee to be sieved particulate matter and follow feed inlet 13a and get into granule screening pipeline 13 smoothly and can follow the centre bore of vertical section 15 and continue to rise. In this way, since the screened particulate matter has predetermined kinetic energy when rising, the screened particulate matter entering the vertical section 15 can continue to rise along the central hole of the vertical section 15, thereby reducing the possibility that the screened particulate matter collides with the pipe wall of the particle screening pipe 13 too early or too fast to cause the screened particulate matter to be rebounded back into the drying tower 11 by the particle screening pipe 13; on the other hand, each screened particulate matter can be temporarily received by the central aperture of the vertical section 15, reducing the likelihood that the screened particulate matter will easily fall back from the particle screening conduit 13 to the drying tower 11 as it collides with each other. The screened particles entering the vertical section 15 can smoothly enter the main body section 14 under the driving action of the airflow and finally are discharged from the discharge hole 13 b.
In an embodiment, the part of the main body section 14 extending into the drying tower 11 and the vertical section 15 are in a cantilever state, so that the part of the main body section 14 extending into the drying tower 11 and the vertical section 15 are not connected with the drying tower 11 through a structural member, the possibility that the part of the main body section 14 extending into the drying tower 11 and the vertical section 15 interfere with the airflow in the drying tower 11 is effectively reduced, the adverse disturbance of the airflow is reduced, the stability of the airflow is further ensured, and the improvement of the screening precision and the improvement of the screening effect are facilitated. Further, the vertical section 15 and the main body section 14 are perpendicular to each other, and the vertical section 15 is located below the main body section 14.
According to the drying and screening device 10 provided by the embodiment of the invention, the feed liquid is atomized and sprayed into the drying tower 11 through the centrifugal atomization sprayer 12 to form atomized liquid beads. Then the atomized liquid beads are quickly dried and solidified in a drying tower 11 into particles by introducing dry gas. When the particles move to the bottom of the drying tower 11, the particles reaching the predetermined weight and less than the predetermined weight will move upward under the action of the airflow in the drying tower 11 and enter the vertical section 15 of the particle screening pipeline 13, then enter the main section 14, and finally be discharged from the discharge port 13b, while the particles with the self weight greater than the predetermined weight will continue to descend and finally be discharged from the material outlet 111 at the bottom of the drying tower 11 out of the drying tower 11. In this way, in the embodiment of the present invention, the particle sieving pipeline 13 is used for sieving the particles generated by the granulation in the drying tower 11, so as to separate the particles meeting the predetermined weight and less than the predetermined weight from the particles not meeting the predetermined weight, thereby improving the separation efficiency of the unqualified particles and the qualified particles, and improving the separation effect. The drying and screening device 10 provided by the embodiment of the invention can atomize and dry the slurry to obtain the particulate matter, and directly screen the particulate matter, so that the processing procedure is effectively simplified, the production efficiency is high, additional screening equipment does not need to be matched, and the production cost is reduced.
The feed opening 13a of the vertical section 15 of the present embodiment is circular or regular polygonal. The material outlet 111 of the drying tower 11 is circular or regular polygonal. Here, the regular polygon may be a regular polygon in which each side is a straight line, such as a regular triangle, a square, a regular pentagon, or the like, or may be a regular polygon in which each side is an arc, such as a shape having three or more arc sides. In one example, referring to FIG. 2, the center O of the feed port 13a1And the center O of the material outlet 1112Is arranged oppositely along the vertical direction X, namely the feed inlet 13a and the material outlet 111 are arranged coaxially, and the feeding is carried outCenter O of port 13a1And the center O of the material outlet 1112The projections in the vertical direction X coincide. Thus, the center O of the feed port 13a1In a central position of the drying tower 11. The feeding hole 13a is positioned in the central area of the spirally descending airflow, so that on one hand, the spirally descending airflow exerts a small interference acting force on the particulate matters about to enter the vertical section 15, the influence on the motion track of the particulate matters is small, and the screening effect is improved; on the other hand, under the action of the air flow in the drying tower 11, the particulate matter satisfying the predetermined weight and less than the predetermined weight can move from all directions toward the central region of the drying tower 11, so that the particulate matter in all directions can easily enter the vertical section 15.
In one embodiment, referring to FIG. 3, the area S of the feed opening 13a1Area S of material outlet 1112Is 0.05 to 0.5. Preferably, the area S of the feed opening 13a1Area S of material outlet 1112The ratio of (A) to (B) is 0.3. Area S of the material outlet 1112When not changed, the area S of the feed port 13a1Area S of material outlet 1112When the ratio of (2) is less than 0.05, the screened particles are difficult to enter the vertical section 15, so that the screening efficiency and the screening effect are obviously reduced. Area S of the material outlet 1112When not changed, the area S of the feed port 13a1Area S of material outlet 1112When the ratio of (2) is greater than 0.5, the probability that the particulate matter with the weight greater than the preset weight enters the vertical section 15 is improved, so that unqualified particulate matter enters the vertical section 15, and the screening precision and the screening effect are reduced.
Referring to fig. 1, the drying tower 11 of the present embodiment has a cylindrical body 112 extending in a vertical direction X. The cylindrical body 112 includes a conical section 112a and a cylindrical section 112b having a large opening and a small opening. The cylindrical section 112b is disposed above the conical section 112 a. The small opening of the conical section 112a is the material outlet 111. The tapered section 112a facilitates convergence of the particles toward the central region of the drying tower 11 to facilitate easier lifting of the screened particles by the airflow in the drying tower 11 and blowing into the vertical section 15. The drying tower 11 further includes a first air supplement part 115 connected to the cylindrical section 112b and a second air supplement part 116 connected to the conical section 112 a. In one example, the gas fed into the drying tower 11 is nitrogen or other inert gas. The gas supplemented into the drying tower 11 by the first gas supplementing part 115 and the second gas supplementing part 116 is also nitrogen or other corresponding inert gases. The drying and screening device 10 of the present embodiment further comprises a pressure transmitter (not shown) connected to the drying tower 11 for monitoring the pressure in the drying tower 11. When the pressure in the drying tower 11 deviates from a predetermined value, the first air supplement part 115 and/or the second air supplement part 116 supplements the air to the drying tower 11 so as to maintain a predetermined positive pressure value in the drying tower 11. The first air supplement part 115 and/or the second air supplement part 116 can be automatically controlled to be turned on/off by the central controller. When the first air supplement member 115 and/or the second air supplement member 116 supplement the gas into the drying tower 11, the impact can be applied to the particles adhered to the inner wall of the drying tower 11, so that the particles are separated from the inner wall of the drying tower 11, and the possibility of the particles accumulating on the inner wall of the drying tower 11 is reduced. In one example, the first air supplement part 115 and the second air supplement part 116 are identical in structure, and both include a duct connected to the drying tower 11 and an air intake valve. In one example, the drying tower 11 has an insulation layer disposed outside the cylindrical body 112 to insulate the cylindrical body 112, saving energy.
The cylindrical body 112 of the present embodiment has an inlet 113 provided corresponding to the vertical section 15 in a horizontal direction perpendicular to the vertical direction X. The drying tower 11 has a cylindrical main body 112 and a sealing plate 114 extending in the vertical direction X. The sealing plate 114 is sealingly connected to the cylindrical body 112 to close or open the inlet/outlet 113. The access 113 that the tube-shape main part 112 set up can be convenient for operating personnel to overhaul and maintain vertical section 15 through access 113, perhaps clears up and maintains the drying tower 11 bottom to effectively reduce the operation degree of difficulty, reduce personnel's safety risk.
In one embodiment, referring to fig. 4 or 5, the particle screening conduit 13 includes a first pipe member 130 and a second pipe member 131. The first pipe member 130 has an extension pipe section 130a provided in the drying tower 11 and extending in the vertical direction X. The second pipe member 131 is movably sleeved on the extension pipe section 130a along the vertical direction X. The extension pipe section 130a and the second pipe member 131 are configured as the vertical section 15. The feed opening 13a is provided in the second pipe member 131. The size of the second pipe member 131 protruding out of the extension pipe section 130a is adjusted by moving the second pipe member 131 in the vertical direction X to adjust the height of the feed opening 13a, thereby achieving adjustment of the distance H between the feed opening 13a and the material outlet 111 in the vertical direction X.
When the flow velocity of the air flow is at a stable value, the higher the height of the particulate matter which can be lifted by the air flow is, the lighter the self weight of the particulate matter is, so that the screening of the particulate matter with different weights can be realized by controlling the distance between the feeding hole 13a of the vertical section 15 and the material outlet 111 of the drying tower 11. The more the inlet opening 13a is located near the material outlet 111, the greater the predetermined weight of the screened particles can be set, at which time particles with a higher weight can also enter the vertical section 15. The smaller the predetermined weight of the screened particles can be set the further the feed opening 13a is from the material outlet 111, at which point the lighter weight particles can enter the vertical section 15. By controlling the distance between the feed opening 13a of the vertical section 15 and the material outlet 111 of the drying tower 11, it is possible to sieve particles of different set predetermined weights. According to different screening requirements, the second pipe member 131 is adjusted in a moving mode, so that the particle screening pipeline 13 can screen out particles meeting different weight values and particles smaller than the preset weight, and adaptability, flexibility, screening precision and screening particle weight distribution range precision of the drying and screening device 10 are improved. Because this embodiment can be through the height of second pipe fitting 131 adjustment feed inlet 13a to do not need personnel to get into in the drying tower 11 and carry out the structural damage (for example, cut and shorten the size or weld and increase the size) to vertical section 15 and adjust the height of feed inlet 13a, thereby effectively reduce the operation degree of difficulty, reduce personnel's safety risk.
In one embodiment, the extension pipe section 130a of the first pipe member 130 and one end of the second pipe member 131 are threadedly coupled. By screwing the second pipe member 131, the size of the extension pipe section 130a of the second pipe member 131 extending out of the extension pipe section 130a can be adjusted, so that the height of the feed port 13a can be adjusted, an operator can adjust the second pipe member 131 without carrying or using an additional tool, and the adjustment difficulty and complexity are reduced. The extension tube segment 130a and the second tube member 131 are securely connected such that the second tube member 131 is not easily removed from the extension tube segment 130a during vibration or other external forces during operation of the drying screen apparatus 10. In this embodiment, each turn of the second pipe 131 is screwed, the second pipe 131 can feed one pitch relative to the extension pipe section 130a, and simultaneously, the height of the feeding port 13a is increased or decreased by one pitch, so that the screwing-in or screwing-out size of the second pipe 131 can be accurately controlled easily through the pitch, the height of the feeding port 13a can be accurately controlled, and therefore, the particulate matters with the preset weight matched with the height of the feeding port 13a can enter the vertical section 15, and the screening precision is effectively improved.
In one example, the extension pipe segment 130a and the second pipe member 131 are sealingly connected such that no airflow can pass between the extension pipe segment 130a and the second pipe member 131, reducing the likelihood of particulate matter entering between the extension pipe segment 130a and the second pipe member 131. Optionally, a sealing ring is provided between the extension pipe section 130a and the second pipe member 131.
In one embodiment, the extension pipe segment 130a and the second pipe member 131 are slidably coupled. In this way, the second pipe member 131 can realize stepless adjustment of the extending or retracting size in the extension pipe section 130a, so that the height of the feeding hole 13a can be adjusted to any height meeting the requirement, thereby realizing screening of particulate matters with any predetermined weight in a predetermined weight range, and effectively improving the screening precision of the particle screening pipeline 13. In one example, a scale is provided on the second pipe member 131 to facilitate manual adjustment of the second pipe member 131 to a position satisfying the sieving requirement, so that the height of the feeding opening 13a is at a height satisfying the sieving requirement. In one example, one of the extension pipe section 130a and the second pipe member 131 is provided with a slide groove extending in the vertical direction X, and the other is provided with a slide block matching with the slide groove.
After adjusting second pipe fitting 131 to predetermined position, second pipe fitting 131 passes through locking piece 132 locking in extension pipeline section 130a to make second pipe fitting 131 and extension pipeline section 130a connection status stable, guarantee that dry screening plant 10 is at the operation in-process, the relative position between second pipe fitting 131 and extension pipeline section 130a is difficult for changing, and then guarantees that the height of feed inlet 13a is difficult for changing, guarantees that screening work normally goes on. In one example, the extension pipe section 130a and the second pipe member 131 are clearance fit so that the second pipe member 131 slides along the extension pipe section 130a relatively easily when a force in the vertical direction X is applied to the second pipe member 131. In one embodiment, the extension pipe segment 130a is sleeved outside the second pipe 131. The locking member 132 is screwed with the extension pipe section 130a and abuts against the outer peripheral surface of the second pipe member 131. Alternatively, the locking member 132 is a threaded post or screw.
The drying tower 11 of the present embodiment has a cylindrical main body 112 extending in the vertical direction X. The cylindrical body 112 includes a tapered section 112a having a large opening and a small opening, and a cylindrical section 112b disposed above the tapered section 112 a. The small opening of the conical section 112a is the material outlet 111. The second pipe member 131 has a cylindrical center hole. The opening of the cylindrical center hole is a feed port 13 a. The end surface of the second pipe member 131 facing away from the extension pipe section 130a is horizontal, so that the feeding opening 13a is horizontal, and the material outlet 111 at the bottom of the drying tower 11 is horizontal, thereby ensuring that the probability of the screened particles moving to the feeding opening 13a from all directions entering the feeding opening 13a is approximately the same. In one embodiment, referring to fig. 5, the diameter of the cylindrical central hole of the second pipe member 131 is the same as the diameter of the pipe section of the extension pipe section 130a not connected with the second pipe member 131, so that the inner wall of the cylindrical central hole formed by the second pipe member 131 is aligned with the inner wall of the pipe section of the extension pipe section 130a not connected with the second pipe member 131 along the vertical direction X, and thus no step is formed in the transition region between the two, and the possibility that the particulate matter is accumulated in the transition region between the two to affect the sieving effect is reduced.
In one embodiment, the drying tower 11 of the present embodiment has a cylindrical main body 112 and a sealing plate 114 extending in the vertical direction X. The cylindrical body 112 has an inlet 113 provided in correspondence with the vertical section 15 in the horizontal direction. The sealing plate 114 is sealingly connected to the cylindrical body 112 to close or open the inlet/outlet 113. The entrance 113 that the tube-shape main part 112 set up can be convenient for operating personnel to get into drying tower 11 through entrance 113 to adjust the size that second pipe fitting 131 stretches out or retracts extension pipe section 130a, thereby accomplish the high regulation work of feed inlet 13a fast conveniently, effectively reduce the operation degree of difficulty, reduce the safety risk that exists when personnel linger in drying tower 11.
Referring to fig. 6, the embodiment of the present invention further provides a drying and screening apparatus 20, which includes the drying and screening device 10 of the above embodiment and a cyclone 21 connected to the drying and screening device 10.
The cyclone 21 of the present embodiment is disposed downstream of the drying tower 11. The discharge port 13b of the particle sorting duct 13 communicates with the inner space of the cyclone 21. The cyclone 21 receives the particles discharged from the discharge port 13b and screens all the particles. The drying and screening device 10 is used for carrying out primary screening on the particulate matters through the drying tower 11 and the particle screening pipeline 13, and separating the particulate matters meeting the preset weight and less than the preset weight from the particulate matters exceeding the preset weight. The particulate matter of a predetermined weight and less than the predetermined weight is then passed with the gas stream through the particle screening duct 13 into the cyclone 21. The cyclone separator 21 performs secondary screening on all the particulate matters to finally obtain qualified finished particulate matters. The qualified product exits the cyclone 21 through the bottom outlet of the cyclone 21. In one embodiment, the bottom of the cyclone 21 is provided with a discharge valve 16 and a collector. A discharge valve 16 is disposed below the outlet. After the discharge valve 16 is opened, the material will enter the collector through the material outlet 111 and the discharge valve 16.
In one embodiment, the cyclone separator 21 has a gas make-up conduit and a pressure transducer. The pressure inside the cyclone 21 is monitored by means of a pressure transmitter. When the pressure inside the cyclone 21 is low, the gas is supplemented into the cyclone 21 through the gas supplementing pipe so that the inside of the cyclone 21 is maintained at a predetermined positive pressure value.
The drying and screening device 20 of the embodiment of the invention is used by matching the drying and screening device 10 and the cyclone separator 21 to perform secondary separation on the particulate matters formed after granulation, thereby effectively reducing the number of screening devices, improving screening efficiency and screening precision, ensuring ideal separation effect of the particulate matters and obtaining the finished particulate matters with proper and reasonable particle size distribution range or weight distribution range.
The drying and screening device 20 of the present embodiment also includes a dust separator 22. The dust separator 22 is connected to the cyclone 21. The dust collector 22 includes a dust removing tower 220, an air storage tank 221 connected to the dust removing tower 220, an on-off control valve 222 for controlling the communication or cut-off between the air storage tank 221 and the dust removing tower 220, and an air inlet valve 223 connected to the air storage tank 221. After the particles entering the cyclone separator 21 are separated by the cyclone separator 21, qualified finished particles meeting the predetermined weight requirement are discharged from the bottom of the cyclone separator 21. Particulate matter or other impurities of less than a predetermined weight are conveyed with the gas stream to the dust removal tower 220. After being filtered by the filter in the dust removal tower 220, the particulate matter or dust impurities are captured by the cloth bag capturing component arranged in the dust removal tower 220, and then the purified air flow is discharged from the purified air outlet of the dust removal tower 220. The gas tank 221 is filled with nitrogen gas through an air inlet valve 223 to be reserved. The dust separator 22 also includes a pressure transducer for monitoring the pressure within the dust separation tower 220. The pressure transmitter is interlocked with an on-off control valve 222. When the pressure transmitter monitors that the difference between the internal pressure and the external pressure of the filter in the dust removal tower 220 is too large, the surface dust deposition of the filter is serious, the filtering effect is affected, the switch control valve 222 is interlocked and opened at the moment, and the nitrogen stored in the gas storage tank 221 is utilized for high-pressure back flushing, so that the effect of cleaning the surface dust deposition of the filter is achieved. Alternatively, the on-off control valve 222 may be a solenoid valve.
While the invention has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the invention. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (12)
1. A dry screening device comprising:
the bottom of the drying tower is provided with a material outlet;
the centrifugal atomization ejector is arranged at the top of the drying tower;
granule screening pipeline has feed inlet and discharge gate, granule screening pipeline has vertical section and main part section, vertical section with the main part section is in the feed inlet with distribute in succession between the discharge gate, granule screening pipeline pass through the main part section with the drying tower is connected, vertical section is located in the drying tower and orientation the material export extends, the feed inlet set up in vertical section and orientation the material export, the discharge gate set up in the main part section, the feed inlet with the material export is relative and interval setting in vertical direction, the discharge gate exposes the drying tower sets up.
2. The drying screen apparatus of claim 1, wherein the particle screening conduit includes a first tube having an extension tube section disposed within the drying tower and extending in the vertical direction, and a second tube movably sleeved to the extension tube section in the vertical direction, the extension tube section and the second tube section configured as the vertical section; the feed inlet set up in the second pipe fitting, through following vertical direction removes the second pipe fitting, adjust the feed inlet with distance between the material export.
3. A drying and screening apparatus as claimed in claim 2, wherein:
the extension pipe section is in threaded connection with one end of the second pipe fitting; alternatively, the first and second electrodes may be,
the extension pipe section and the second pipe are connected in a sealing mode.
4. A dry screening device according to claim 2, wherein said extension tube section is slidably connected to said second tube member, said second tube member being locked to said extension tube section by a locking member.
5. The drying and screening device of claim 4, wherein the extension pipe section is sleeved outside the second pipe, and the locking member is in threaded connection with the extension pipe section and abuts against the outer peripheral surface of the second pipe.
6. The drying screen apparatus of claim 2, wherein said drying tower has a cylindrical body extending in said vertical direction, said cylindrical body including a conical section having a large mouth and a small mouth, said small mouth of said conical section being said material outlet, said second tube having a cylindrical central bore, an opening of said cylindrical central bore being said feed inlet.
7. The drying and screening device of any one of claims 1 to 6, wherein said feed inlet is circular or regular polygonal, said material outlet is circular or regular polygonal, and the center of said feed inlet and the center of said material outlet are arranged opposite to each other in said vertical direction.
8. A drying and screening apparatus according to any one of claims 1 to 6, wherein the ratio of the area of said feed inlet to the area of said material outlet is from 0.05 to 0.5.
9. The drying screen apparatus of any one of claims 1 to 5, wherein said drying tower has a cylindrical body extending in said vertical direction, said cylindrical body having an access opening provided in correspondence with said vertical section in a horizontal direction, and a sealing plate sealingly connected to said cylindrical body to close or open said access opening.
10. The drying screen apparatus of any one of claims 1 to 5, wherein the drying tower has a cylindrical body extending in the vertical direction, the cylindrical body including a conical section having a large mouth and a small mouth and a cylindrical section disposed above the conical section, the drying tower further including a first air supplement component connected to the cylindrical section and a second air supplement component connected to the conical section.
11. A dry screening apparatus comprising:
a dry screening device according to any one of claims 1 to 10;
a cyclone separator disposed downstream of the drying tower; the particle screening pipeline is communicated with the inner space of the cyclone separator through the discharge hole; the cyclone receives the particles discharged from the discharge port and screens the particles.
12. The drying and screening device of claim 11, further comprising a dust collector connected to said cyclone separator, said dust collector comprising a dust collection tower, an air storage tank connected to said dust collection tower, an on-off control valve for controlling the communication or cut-off of said air storage tank and said dust collection tower, and an air intake valve connected to said air storage tank.
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| CN201910344571.XA CN111841440A (en) | 2019-04-26 | 2019-04-26 | Drying and screening device and drying and screening equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910344571.XA CN111841440A (en) | 2019-04-26 | 2019-04-26 | Drying and screening device and drying and screening equipment |
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| CN111841440A true CN111841440A (en) | 2020-10-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111841047A (en) * | 2019-04-26 | 2020-10-30 | 宁德时代新能源科技股份有限公司 | Negative electrode material production equipment |
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