CN218530483U - Closed powder fluidized bed - Google Patents
Closed powder fluidized bed Download PDFInfo
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- CN218530483U CN218530483U CN202220063949.6U CN202220063949U CN218530483U CN 218530483 U CN218530483 U CN 218530483U CN 202220063949 U CN202220063949 U CN 202220063949U CN 218530483 U CN218530483 U CN 218530483U
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Abstract
The utility model discloses a closed powder fluidized bed, which comprises a bin body, a feeding device, an air inlet device, an atomizing device and a connecting device; the air inlet device comprises a body arranged at the bottom of the bin body, the body is provided with an air inlet and a plurality of air outlets communicated with the air inlet, and the air inlet is connected with an external air source through an air inlet pipeline and is used for fluidizing the powder material; the atomization device is positioned at the top in the bin body and is provided with a liquid inlet, an air inlet and an atomization nozzle; the liquid inlet is connected with an external liquid source, and the air inlet is connected with an external air source and used for atomizing liquid of the liquid source and mixing the atomized liquid with the fluidized powder material; the connecting device is movably connected with the body and the bin body, so that the body can act to seal the bin body under the action of driving force to fluidize and mix powder materials or open the bin body to discharge the mixed materials. The utility model discloses be applied to powder fluidization technical field, can effectively solve the complicated and polluted environment scheduling problem of equipment structure among the prior art, the environmental protection just simplifies equipment and reduces occupation space.
Description
Technical Field
The utility model relates to a powder fluidization technical field specifically is a closed powder fluidized bed.
Background
The existing powder material is usually purified by a bag dust collector and then exhausted outwards in the fluidization process, and mainly comprises a powder bin, a plurality of dust removal filter bags arranged in the powder bin, and an air inlet and exhaust control device, wherein dust-containing gas enters a space between the interior of the powder bin and a cloth bag through an inlet and flows upwards, part of large-particle dust is separated out by the dust removal cloth bag due to the action of inertia force and falls into an ash hopper at the bottom of the powder bin, small-particle dust is adhered to the surface of the dust removal cloth bag, and air is injected downwards into the dust removal cloth bag at regular time through an air flow air injection pipe at the top of the powder bin, so that the dust removal cloth bag shakes under the action of air flow flowing in a vertical cross manner to shake off dust on the dust removal cloth bag; the filter bag is made of woven filter cloth or non-woven felt, the dust-containing gas is filtered by the filtering action of the fiber fabric, after the dust-containing gas enters the bag type dust collector, dust with large particles and large specific gravity falls into the dust hopper due to the sedimentation of the gravity, and when the gas containing fine dust passes through the filter material, the dust is blocked, so that the gas is purified. The powder needs to discharge gas to the outside in the fluidization process, so that the powder is easy to pollute the environment on one hand, and the structure is relatively complex on the other hand.
SUMMERY OF THE UTILITY MODEL
To the not enough among the above-mentioned prior art, the utility model provides a closed powder fluidized bed for overcome defects such as polluted environment among the prior art, reduce the pollution of dust to the environment and simplify equipment structure.
In order to achieve the above object, the utility model provides a closed powder fluidized bed, include:
the bin body is closed at the upper end and opened at the bottom and is used for providing a space for mixing powder materials and liquid;
one end of the feeding device is connected with the bin body, and the other end of the feeding device is used for inputting powder materials;
the air inlet device comprises a body arranged at the bottom of the bin body, the body and the bin body are enclosed to form a sealed space, the body is provided with an air inlet and a plurality of air outlets which are communicated with the air inlet, the air outlets face the falling direction of the powder materials, and the air inlet is connected with an external air source through an air inlet pipeline and used for fluidizing the powder materials;
the atomizing device is positioned at the top in the bin body and is provided with a liquid inlet, an air inlet and an atomizing nozzle, and the atomizing nozzle faces downwards; the liquid inlet passes through the bin body through a liquid inlet pipe and is connected with an external liquid source, and the air inlet is connected with an external air source through an air inlet pipe and is used for atomizing liquid of the liquid source and mixing the atomized liquid with fluidized powder materials;
the connecting device is movably connected with the body of the air inlet device and the bin body, and can enable the body to act and seal the bin body under the action of driving force so as to fluidize and mix powder materials or open the bin body to discharge the mixed materials.
In another embodiment, the feeding device comprises at least one feeding pipe obliquely arranged on the bin body from top to bottom, the feeding pipe is communicated with the interior of the bin body, and a feeding electric control valve for controlling the feeding pipe to be communicated with the interior of the bin body is arranged in the feeding pipe.
In another embodiment, the device also comprises a plurality of feeding pipes which are uniformly distributed along the circumference of the bin body.
In another embodiment, the atomizing device is located above the feeding pipe, the atomizing device comprises an atomizing disk arranged along the cross section direction of the cabin body, and a plurality of atomizing nozzles are installed on the surface of the atomizing disk facing the feeding pipe.
In another embodiment, the body is a shutter plate with a hollow cavity inside, the air inlet is arranged at the side part of the shutter plate, the air outlets are uniformly distributed at the top of the shutter plate, the air inlet and the air outlet are both communicated with the hollow cavity, and the side part of the shutter plate is a spherical structure tangential to the inner wall of the bin body;
the air inlet pipeline is positioned at one side of the bin body, one end of the air inlet pipeline is positioned outside the bin body, the other end of the air inlet pipeline is positioned in the bin body and positioned in the hollow cavity after penetrating through the air inlet, and the flashboard is rotatably connected with the air inlet pipeline;
the connecting device comprises a driving assembly and a driving shaft which are arranged on the other side of the bin body, the driving assembly is fixedly arranged on the outer wall of the bin body, one end of the driving shaft is positioned outside the bin body and is in transmission connection with the driving assembly, the other end of the driving shaft is positioned in the bin body and is fixedly connected with the flashboard, and the driving shaft is coaxial with the air inlet pipeline.
In another embodiment, the driving assembly comprises a mounting seat, a driving motor and a transmission mechanism;
the mounting seat is fixedly arranged on the outer wall of the bin body, the driving shaft is rotatably connected to the mounting seat and the bin body, the driving motor is fixedly arranged on the mounting seat, and the output end of the driving motor is in transmission connection with the driving shaft through a transmission mechanism.
In another embodiment, each air outlet is provided with a fluidizing nozzle, and the fluidizing nozzles face upwards.
In another embodiment, the closed powder fluidized bed further comprises a discharging channel, one end of the discharging channel is communicated with the bottom opening of the bin body, the other end of the discharging channel is provided with a discharging hole, and a discharging valve is arranged in the discharging channel and close to the discharging hole.
In another embodiment, the closed powder fluidized bed further comprises a bracket, and the bin body and the blanking channel are supported on the bracket.
In another embodiment, the bin body is further provided with an observation window.
The utility model provides a pair of closed powder fluidized bed, at first drive connecting device makes the body of hot blast blowpipe apparatus and storehouse body seal cooperation during the use, get into the powder material in to the storehouse through the valve of opening feed arrangement, start hot blast blowpipe apparatus from storehouse body bottom air inlet upwards simultaneously, the powder material is fluidized under the wind-force effect, spout into the atomized liquid from the top downwards after atomizing the liquid that will need to mix with the powder material through the atomizing device, the atomized liquid is dispersed into tiny liquid drop and fluidized powder and combines, realize the homogeneous mixing of powder and liquid, but wide application in solid-liquid mixing of small capacity, the capsule, the granulation, slurrying, high strength concrete, solid-liquid two phases or solid-liquid-gas three-phase homogeneous mixing fields such as foam concrete; in the fluidization process, the air inlet device gradually increases the air inlet pressure according to the air pressure in the bin body, so that the scheme is completely carried out in a sealed space relative to the existing fluidization equipment, and no external exhaust gas is needed, thereby greatly reducing the pollution to the operation environment and the external atmospheric environment, avoiding dust removal equipment, simplifying the equipment structure and reducing the occupied space of the treatment process and equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a first isometric view of a sealed powder fluidized bed according to an embodiment of the present invention;
FIG. 2 is a second isometric view of a sealed powder fluidized bed according to an embodiment of the present invention;
FIG. 3 is a first cross-sectional view of a sealed powder fluidized bed in an embodiment of the present invention;
FIG. 4 is a second cross-sectional view of a sealed powder fluidized bed in an embodiment of the present invention;
FIG. 5 is a schematic view of the connection device, the air intake device and the local connection of the bin body in the embodiment of the present invention;
FIG. 6 is a schematic view of a partial connection between a connection device and an air intake device according to an embodiment of the present invention;
fig. 7 is an isometric view of a gate in an embodiment of the invention;
fig. 8 is a cross-sectional view of the shutter in the embodiment of the present invention.
Reference numbers: the device comprises a bin body 1, an observation window 101, a feeding pipe 2, a feeding electric control valve 201, an atomizing device 3, an atomizing disc 301, a flashboard 4, an air inlet 401, an air outlet 402, a hollow cavity 403, a connecting hole 404, a fluidizing nozzle 405, an air inlet pipeline 5, an air inlet electric control valve 501, a driving shaft 6, a mounting seat 7, a transmission mechanism 701, a clamp 702, a driving motor 8, a blanking channel 9, a discharge hole 901, a discharge valve 902 and a support 10.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, back, 8230; \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In addition, the technical solutions of the embodiments of the present invention can be combined with each other, but it is necessary to use a person skilled in the art to realize the basis, and when the technical solutions are combined and contradictory to each other or cannot be realized, the combination of the technical solutions should not exist, and is not within the protection scope of the present invention.
Fig. 1 to 8 show a sealed powder fluidized bed disclosed in this embodiment, which includes: comprises a bin body 1, a feeding device, an air inlet device, an atomizing device 3 and a connecting device; the upper end of the bin body 1 is closed, and the bottom of the bin body is opened, so that a space is provided for mixing powder materials and liquid; one end of the feeding device is connected with the bin body 1, and the other end of the feeding device is used for inputting powder materials; the air inlet device comprises a body arranged at the bottom of the bin body 1, the body and the bin body 1 are enclosed to form a sealed space, the body is provided with an air inlet 401 and a plurality of air outlets 402 which are communicated with the air inlet 401, the air outlets 402 face the falling direction of the powder materials, and the air inlet 401 is connected with an external air source through an air inlet pipeline 5 and is used for fluidizing the powder materials; the atomizing device 3 is positioned at the top in the bin body 1 and is provided with a liquid inlet, an air inlet and an atomizing nozzle, and the atomizing nozzle faces downwards; the liquid inlet passes through the bin body 1 through a liquid inlet pipe and is connected with an external liquid source, and the air inlet is used for passing through the bin body 1 through an air inlet pipe and is connected with an external air source and is used for atomizing liquid of the liquid source and mixing the atomized liquid with fluidized powder materials; the connecting device is movably connected with the body of the air inlet device and the bin body 1, and can enable the body to act to seal the bin body 1 under the action of driving force so as to fluidize and mix powder materials or open the bin body 1 to discharge the mixed materials.
In this embodiment, the bin body 1 may adopt a cylindrical structure or a frustum-shaped funnel structure, which is not limited herein; the air inlet device is used for supplying air into the bin body 1 on one hand and playing a role of a valve on the other hand, the bin body 1 is closed when the air inlet device is closed, and fluidization and mixing operation are started; when the air inlet device is opened, the mixing operation is completed, and the materials are discharged through the bottom of the bin body 1; therefore, the body of the air inlet device is closed and opened by controlling the power source to drive the connecting device to act.
When the sealed powder fluidized bed is used in the embodiment, firstly, the connecting device is driven to enable the body of the air intake device to be in sealing fit with the bin body 1, a sealed space is formed inside the bin body 1, the feeding device is opened to feed powder materials into the bin body 1, meanwhile, the air intake device is started to ventilate upwards from the bottom of the bin body 1, the powder materials are fluidized under the action of wind power, liquid needing to be mixed with the powder materials is atomized by the atomizing device 3 and then is sprayed into the bin body 1 from the upper part downwards, atomized liquid is dispersed into tiny liquid drops to be combined with fluidized powder, uniform mixing of the powder and the liquid is realized, and the sealed powder fluidized bed can be widely applied to the fields of small-capacity solid-liquid mixing, coating, granulation, pulping, high-strength concrete, foam concrete and other solid-liquid or solid-liquid-gas three-phase homogeneous mixing and the like. Wherein need notice, because at the fluidization in-process, hot blast blowpipe apparatus and atomizing device 3 let in gas to the storehouse body 1 always, and the storehouse body 1 is inclosed again, can make the atmospheric pressure crescent in the storehouse body 1, consequently hot blast blowpipe apparatus and atomizing device 3 let in gaseous atmospheric pressure and also increase in step in concrete implementation in-process, even make hot blast blowpipe apparatus and atomizing device 3 let in gaseous atmospheric pressure be greater than the atmospheric pressure in the storehouse body 1 all the time, just can make the storehouse body 1 not need outer row of gas, consequently greatly reduced the pollution to operation environment and outside atmospheric environment, and also need not dust collecting equipment, the equipment structure is simplified, and the occupation space of processing procedure and equipment has been reduced.
In this embodiment, the feeding device comprises at least one feeding pipe 2 obliquely arranged on the bin body 1 from top to bottom, the feeding pipe 2 is communicated with the inside of the bin body 1, and a feeding electric control valve 201 for controlling the communication area between the feeding pipe 2 and the inside of the bin body 1 is arranged in the feeding pipe 2. The feeding device adopts the feeding pipe 2 to be obliquely arranged on the bin body 1, preferably, the extension line of the central line of the feeding pipe 2 is intersected with the central axis of the bin body 1, so that the material can stretch outwards from the central position after entering the bin body 1 through the feeding pipe 2, and the uniform fluidization of the air outlet 402 of the air intake device is facilitated. The feeding electric control valve 201 is used for controlling the flow of the material, preventing the material from leaking outwards through the feeding pipe 2 in the fluidization process, and simultaneously ensuring the sealing environment in the bin. Wherein preferably, the feeding device comprises a plurality of feeding pipes 2, and the feeding pipes 2 are uniformly distributed along the circumferential direction of the bin body 1.
In this embodiment, the atomizing device 3 is located above the feeding pipe 2, the atomizing device 3 includes an atomizing disk 301 arranged along the cross-sectional direction of the bin body 1, and a plurality of atomizing nozzles are installed on the surface of the atomizing disk 301 facing the feeding pipe 2. The structure of the atomizing device 3 can adopt the existing atomizing structure, and the atomizing disc 301 can be set to be a concave arc surface structure or a circular truncated cone or frustum-shaped surface structure so as to be suitable for uniformly mixing air flows (the shape with high lift at the central part and low lift at the edge part) formed after the powder materials are fluidized.
In this embodiment, the body is a shutter 4 having a hollow cavity 403 inside, the air inlet 401 is disposed at a side portion of the shutter 4, the air outlets 402 are uniformly distributed at a top portion of the shutter 4, the air inlet 401 and the air outlet 402 are both communicated with the hollow cavity 403, the side portion of the shutter 4 is a spherical structure tangential to an inner wall of the bin body 1, and a sealing ring is disposed at the side portion of the shutter 4. The air inlet pipeline 5 is positioned at one side of the bin body 1, one end of the air inlet pipeline 5 is positioned outside the bin body 1, an air inlet electric control valve 501 is arranged on a part of the pipe body of the air inlet pipeline 5, which is positioned outside the bin body 1, the other end of the air inlet pipeline 5 is positioned in the bin body 1, penetrates through the air inlet 401 and then is positioned in the hollow cavity 403, and the flashboard 4 is rotatably connected with the air inlet pipeline 5. Connecting device is including establishing drive assembly and the drive shaft 6 at storehouse body 1 opposite side, drive assembly fixes to be established on the outer wall of the storehouse body 1, the one end of drive shaft 6 is located outside the storehouse body 1 and links to each other with the drive assembly transmission, the other end of drive shaft 6 is located storehouse body 1 and links to each other with flashboard 4 is fixed, the position that corresponds drive shaft 6 on the flashboard 4 is equipped with connecting hole 404, drive shaft 6 passes behind connecting hole 404 to be located well cavity 403 and pass through the fixed linking to each other of key-type or welded mode with flashboard 4. The drive shaft 6 is coaxial with the intake duct 5. Drive shaft 6 through drive assembly and rotate, and then drive flashboard 4 and use drive shaft 6, intake stack 5 to rotate as the axle, and flashboard 4 can realize opening or closing of storehouse body 1 at the pivoted in-process.
In the specific implementation process, the driving assembly includes a mounting base 7, a driving motor 8 and a transmission mechanism 701. The mount pad 7 is fixed to be established on the outer wall of the storehouse body 1 through bolted connection or welded mode, and drive shaft 6 rotates through the bearing to be connected on mount pad 7 and the storehouse body 1, and driving motor 8 passes through clamp 702 and fixed the establishing on mount pad 7, and driving motor 8's output passes through drive mechanism 701 and links to each other with drive shaft 6 transmission. Wherein, the transmission mechanism 701 is a transmission belt.
In a preferred embodiment, a fluidizing nozzle 405 is disposed on the shutter 4 at a position corresponding to each air outlet 402, and the fluidizing nozzle 405 faces upward to improve the fluidizing effect.
In this embodiment, the sealed powder fluidized bed further includes a discharging channel 9, one end of the discharging channel 9 is communicated with the bottom opening of the bin body 1, the other end is provided with a discharging hole 901, and a discharging valve 902 is arranged in the discharging channel 9 and close to the discharging hole 901. In the specific implementation process, the blanking channel 9 and the bin body 1 can be an integral body, namely the gate plate 4 is positioned between the bin body 1 and the blanking channel 9, and the blanking channel 9 and the bin body 1 can also be a combined structure formed by connecting a plurality of cylindrical structures or circular truncated cone structures through flanges and bolts. In the specific implementation process, a buffer hopper is connected to the feed opening 901, after the fluidization operation is completed, the gate 4 and the discharge valve 902 are opened, at the moment, the slurry in the bin body 1 can be directly taken out by the high-pressure gas in the bin body 1 to enter the buffer hopper, and the slurry with gas flows out after being buffered in the buffer hopper through the buffer hopper, so that the slurry is prevented from splashing. Meanwhile, a circulating pump can be arranged in the buffer hopper to pump away the gas sprayed out of the bin body 1 for cyclic utilization.
In this embodiment, the sealed powder fluidized bed further comprises a support 10, and the bin body 1 and the blanking channel 9 are supported on the support 10.
In this embodiment, the bin body 1 is further provided with an observation window 101, so that a worker can observe the fluidization condition in the bin body 1 through the observation window 101.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the patent scope of the utility model, all be in the utility model discloses a under the design, utilize the equivalent structure transform of what the content of the description and the attached drawing was done, or direct/indirect application all includes in other relevant technical field the utility model discloses a patent protection is within range.
Claims (10)
1. A closed powder fluidized bed, comprising:
the bin body is closed at the upper end and opened at the bottom and is used for providing a space for mixing powder materials and liquid;
one end of the feeding device is connected with the bin body, and the other end of the feeding device is used for inputting powder materials;
the air inlet device comprises a body arranged at the bottom of the bin body, the body and the bin body are enclosed to form a sealed space, the body is provided with an air inlet and a plurality of air outlets which are communicated with the air inlet, the air outlets face the falling direction of the powder materials, and the air inlet is connected with an external air source through an air inlet pipeline and used for fluidizing the powder materials;
the atomizing device is positioned at the top in the bin body and is provided with a liquid inlet, an air inlet and an atomizing nozzle, and the atomizing nozzle faces downwards; the liquid inlet passes through the bin body through a liquid inlet pipe and is connected with an external liquid source, and the air inlet is connected with an external air source through an air inlet pipe and is used for atomizing liquid of the liquid source and mixing the atomized liquid with fluidized powder materials;
the connecting device is movably connected with the body of the air inlet device and the bin body, and the body can move to seal the bin body under the action of driving force so as to fluidize and mix powder materials or open the bin body to discharge the mixed materials.
2. The closed powder fluidized bed as claimed in claim 1, wherein the feeding device comprises at least one feeding pipe obliquely arranged on the bin body from top to bottom, the feeding pipe is communicated with the interior of the bin body, and a feeding electric control valve for controlling the feeding pipe to be communicated with the interior of the bin body is arranged in the feeding pipe.
3. The closed powder fluidized bed as claimed in claim 2, further comprising a plurality of the feeding pipes, wherein the feeding pipes are uniformly distributed along a circumference of the silo body.
4. A closed powder fluidized bed as claimed in claim 2 or 3, wherein the atomizing device is located above the feeding tube, the atomizing device comprises an atomizing disk arranged along the cross-sectional direction of the chamber body, and a plurality of atomizing nozzles are installed on the surface of the atomizing disk facing the feeding tube.
5. A closed powder fluidized bed as claimed in claim 1, 2 or 3, wherein the body is a shutter plate having a hollow cavity inside, the air inlet is disposed at a side portion of the shutter plate, each air outlet is uniformly distributed at a top portion of the shutter plate, the air inlet and the air outlet are both communicated with the hollow cavity, and the side portion of the shutter plate is a spherical structure tangential to the inner wall of the chamber body;
the air inlet pipeline is positioned on one side of the bin body, one end of the air inlet pipeline is positioned outside the bin body, the other end of the air inlet pipeline is positioned in the bin body and positioned in the hollow cavity after penetrating through the air inlet, and the flashboard is rotatably connected with the air inlet pipeline;
the connecting device comprises a driving component and a driving shaft which are arranged on the other side of the bin body, the driving component is fixedly arranged on the outer wall of the bin body, one end of the driving shaft is positioned outside the bin body and is in transmission connection with the driving component, the other end of the driving shaft is positioned in the bin body and is fixedly connected with the flashboard, and the driving shaft is coaxial with the air inlet pipeline.
6. The closed powder fluidized bed as claimed in claim 5, wherein the driving assembly comprises a mounting seat, a driving motor and a transmission mechanism;
the mounting seat is fixedly arranged on the outer wall of the bin body, the driving shaft is rotatably connected to the mounting seat and the bin body, the driving motor is fixedly arranged on the mounting seat, and the output end of the driving motor is in transmission connection with the driving shaft through a transmission mechanism.
7. The closed powder fluidized bed as claimed in claim 5, wherein each of the outlets has a fluidizing nozzle facing upward.
8. The closed powder fluidized bed as claimed in claim 1, 2 or 3, further comprising a discharge channel, wherein one end of the discharge channel is communicated with the bottom opening of the silo body, the other end of the discharge channel is provided with a discharge port, and a discharge valve is arranged in the discharge channel and close to the discharge port.
9. The closed powder fluidized bed as claimed in claim 8, further comprising a support, wherein the bin body and the discharge channel are supported on the support.
10. The closed powder fluidized bed as claimed in claim 1, 2 or 3, wherein the chamber body is further provided with an observation window.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2021200772534 | 2021-01-12 | ||
| CN202120077253 | 2021-01-12 |
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| CN218530483U true CN218530483U (en) | 2023-02-28 |
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| CN114288887A (en) * | 2021-01-12 | 2022-04-08 | 吴宇清 | Closed powder fluidized bed |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114288887A (en) * | 2021-01-12 | 2022-04-08 | 吴宇清 | Closed powder fluidized bed |
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