CN219723910U - Intermediate washing tank for pseudo-boehmite production - Google Patents
Intermediate washing tank for pseudo-boehmite production Download PDFInfo
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- CN219723910U CN219723910U CN202321212155.2U CN202321212155U CN219723910U CN 219723910 U CN219723910 U CN 219723910U CN 202321212155 U CN202321212155 U CN 202321212155U CN 219723910 U CN219723910 U CN 219723910U
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- Prior art keywords
- pseudo
- boehmite
- transmission shaft
- supporting frame
- gas
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- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 title claims abstract description 71
- 238000005406 washing Methods 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 9
- 230000001376 precipitating effect Effects 0.000 abstract description 3
- 239000007787 solid Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The utility model relates to the technical field of pseudo-boehmite production, in particular to an intermediate washing tank for pseudo-boehmite production, which can prevent the pseudo-boehmite from precipitating in the process of cleaning the pseudo-boehmite, promotes the contact between the pseudo-boehmite and water, and has good cleaning effect, convenient use and high practicability; the cleaning device comprises a bottom plate, a bracket and a cleaning cylinder, wherein the cleaning cylinder is arranged at the upper end of the bottom plate through the bracket, a cavity is formed in the cleaning cylinder, the upper end of the cleaning cylinder is provided with an opening, a drain pipe communicated with the cavity is arranged at the lower part of the cleaning cylinder, a valve is arranged on the drain pipe, a material taking opening communicated with the cavity is formed in the cleaning cylinder, and a sealing door is arranged outside the material taking opening; the device also comprises a supporting frame, a gas transmission shaft, a plurality of groups of stirring sheets, a filter plate, a blowing device, a gas supply device and a rotating device, wherein the supporting frame is arranged on the bracket, and the upper part of the gas transmission shaft is rotatably arranged on the supporting frame.
Description
Technical Field
The utility model relates to the technical field of pseudo-boehmite production, in particular to an intermediate washing tank for pseudo-boehmite production.
Background
Pseudoboehmite is a non-toxic, odorless powdery substance which is often used as a catalyst or a carrier for a catalyst and has a wide range of applications in the field of chemical industry. The pseudo-boehmite is subjected to carbonation decomposition, high-temperature aging, separation washing and drying in the production process, wherein the separation washing refers to separating solid pseudo-boehmite from liquid, and then placing the solid pseudo-boehmite into a washing tank for washing, so that alkali liquor attached to the surface of the pseudo-boehmite is washed away.
In the prior art, the stirring and washing device with the silencing function for pseudo-boehmite production with the patent application number of 202022741585.6 mainly comprises a box body and a stirring shaft in the box body, when the pseudo-boehmite is washed, the pseudo-boehmite is firstly placed into the box body, then hot water is added into the box body, and then the relative movement between the pseudo-boehmite and the hot water is promoted through the rotation of the stirring shaft, so that the hot water washes alkali liquor on the surface of the pseudo-boehmite.
In the use process, the solid pseudo-boehmite is higher in density than water, so that the solid pseudo-boehmite is easy to precipitate to the bottom of the box body during cleaning, and the part of pseudo-boehmite precipitated to the bottom of the box body is in a stirring blind area of the stirring shaft, so that the cleaning effect of the part of pseudo-boehmite is poor, the use is inconvenient, and a pseudo-boehmite washing water tank with good cleaning effect is needed.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the intermediate washing tank for pseudo-boehmite production, which can prevent the pseudo-boehmite from precipitating in the process of cleaning the pseudo-boehmite, promotes the contact between the pseudo-boehmite and water, and has the advantages of good cleaning effect, convenient use and high practicability.
The utility model relates to an intermediate washing tank for pseudo-boehmite production, which comprises a bottom plate, a bracket and a washing cylinder, wherein the washing cylinder is arranged at the upper end of the bottom plate through the bracket; the device comprises a support frame, a gas transmission shaft, a plurality of groups of stirring sheets, a filter plate, a gas blowing device, a gas supply device and a rotating device, wherein the support frame is arranged on a support, the upper part of the gas transmission shaft is rotatably arranged on the support frame, the plurality of groups of stirring sheets are fixedly arranged on the gas transmission shaft, the lower part of the gas transmission shaft is communicated with the gas blowing device, the gas blowing device and the plurality of groups of stirring sheets are positioned in a cavity of a cleaning cylinder, the upper part of the gas transmission shaft is communicated with the gas supply device, the gas supply device is used for conveying gas to the gas transmission shaft, the rotating device is arranged on the support frame and is used for driving the gas transmission shaft to rotate, the filter plate is arranged at the lower part of the cavity of the cleaning cylinder, and filter cloth is arranged on the filter plate; when solid pseudo-boehmite is washed, firstly, the solid pseudo-boehmite is put into a cavity of a washing cylinder, then hot water is added into the cavity of the washing cylinder, then a rotating device is opened, the rotating device drives a gas transmission shaft to rotate, the gas transmission shaft drives a plurality of groups of stirring sheets to rotate, the plurality of groups of stirring sheets promote the contact between the hot water and the pseudo-boehmite in the rotating process, so that the hot water washes alkali liquor on the surface of the pseudo-boehmite, meanwhile, an air supply device is opened, the air supply device supplies air through an air transmission axial air blowing device, then the air blowing device blows air to the lower part of the cavity of the washing cylinder, so that the air blows up the pseudo-boehmite deposited at the lower part of the cavity of the washing cylinder, the pseudo-boehmite is suspended in the cavity of the washing cylinder to contact with the water, meanwhile, bubbles formed by the blown air play a role of preventing the pseudo-boehmite from depositing in the cavity of the washing cylinder, and fully contact with the water, after the pseudo-boehmite is washed, a valve on the surface of the pseudo-boehmite is firstly opened, the drain pipe in the cavity of the washing cylinder is enabled to pass through a filter plate after the filtering plate is opened, and the material is taken out after the drain pipe in the cavity is sealed through the filter plate of the solid filter plate; the device can prevent the precipitation of the pseudo-boehmite during the cleaning process of the pseudo-boehmite, promotes the contact between the pseudo-boehmite and water, and has good cleaning effect, convenient use and high practicability.
Preferably, the blowing device comprises an exhaust pipe and a plurality of groups of air ejector pipes, the lower end of the air transmission shaft is communicated with the exhaust pipe, the exhaust pipe is provided with the plurality of groups of air ejector pipes, and the plurality of groups of air ejector pipes are communicated with the exhaust pipe; the gas supply device conveys gas into the exhaust pipe through the gas conveying shaft, then the gas enters the plurality of groups of gas spraying pipes through the exhaust pipe, then the gas is blown to the lower part of the cleaning cylinder chamber through the plurality of groups of gas spraying pipes, so that the pseudo-boehmite deposited at the lower part of the cleaning cylinder chamber is blown up, and meanwhile, the gas conveying shaft drives the exhaust pipe and the plurality of groups of gas spraying pipes to rotate in the rotating process, so that the gas can be uniformly blown to the lower part of the cleaning cylinder chamber through the plurality of groups of gas spraying pipes; the precipitation of pseudo-boehmite in the cavity of the cleaning cylinder is prevented, and the cleaning effect of the pseudo-boehmite is improved.
Preferably, the rotating device comprises a bevel gear A, a bevel gear B, a rotating shaft, a fixed plate and a servo motor, wherein the bevel gear A is fixedly sleeved on a gas transmission shaft, the bevel gear A is meshed with the bevel gear B, the bevel gear B is fixedly arranged on the rotating shaft, the rotating shaft is rotatably arranged on the fixed plate and a supporting frame, the fixed plate is fixedly arranged on the supporting frame, the right end of the rotating shaft is connected with the output end of the servo motor, and the servo motor is arranged on the supporting frame; when the gas transmission shaft rotates, the servo motor is turned on, the bevel gear B is rotated through the rotating shaft by the servo motor, and the bevel gear B drives the gas transmission shaft to rotate through the bevel gear A; the rotation of the gas transmission shaft is facilitated.
Preferably, the air supply device comprises a rotary joint, an air supply pipe and a blower, wherein the rotary joint is fixedly arranged on the supporting frame, the upper end of the air transmission shaft is rotatably arranged on the rotary joint, the upper end of the air transmission shaft is communicated with the rotary joint, the input end of the rotary joint is connected with the blower through the air supply pipe, and the blower is fixedly arranged on the supporting frame; when blowing air to the lower part of the cleaning cylinder chamber, the blower is turned on, the blower supplies air to the rotary joint through the air supply pipe, then the air sequentially enters into a plurality of groups of air injection pipes through the rotary joint, the air supply shaft and the exhaust pipe, and then the air is blown to the lower part of the cleaning cylinder chamber through the plurality of groups of air injection pipes; the air is conveniently blown to the lower part of the cavity of the cleaning cylinder.
Preferably, the device also comprises a plurality of groups of one-way valves, and the plurality of groups of one-way valves are respectively arranged on the plurality of groups of air injection pipes; through the arrangement, water in the cavity of the cleaning cylinder is prevented from flowing back into the exhaust pipe through the plurality of groups of air ejector pipes, and the reliability in the use process is improved.
Preferably, the washing machine further comprises a heat tracing belt, wherein the heat tracing belt is coated on the outer side wall of the washing cylinder; when the water temperature in the cavity of the cleaning cylinder is reduced, the heat tracing belt is opened, the temperature of the water in the cavity of the cleaning cylinder is raised through the heat tracing belt, and the cleaning effect of the pseudo-boehmite in the cavity of the cleaning cylinder is improved.
Preferably, a thermometer is arranged on the cleaning cylinder; through the arrangement, the water temperature in the cavity of the cleaning cylinder is conveniently monitored, and convenience in the use process is improved.
Compared with the prior art, the utility model has the beneficial effects that: the method can prevent the precipitation of the pseudo-boehmite during the cleaning of the pseudo-boehmite, promotes the contact between the pseudo-boehmite and water, and has good cleaning effect, convenient use and high practicability.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
FIG. 2 is a schematic view of the structure of the gas transmission shaft, bevel gear A, bevel gear B, etc.;
FIG. 3 is a schematic illustration of an axially measured structure of the present utility model;
fig. 4 is a schematic view of the structure of the air feed pipe, the rotary joint, the blower, etc.;
FIG. 5 is a schematic diagram of the front view of the present utility model;
the reference numerals in the drawings: 1. a bottom plate; 2. a bracket; 3. a cleaning cylinder; 4. a support frame; 5. a gas transmission shaft; 6. stirring sheets; 7. a filter plate; 8. an exhaust pipe; 9. a gas lance; 10. bevel gears A; 11. bevel gear B; 12. a rotation shaft; 13. a fixing plate; 14. a servo motor; 15. a rotary joint; 16. an air supply pipe; 17. a blower; 18. a one-way valve.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. This utility model may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
As shown in fig. 1 to 5, the intermediate washing water tank for pseudo-boehmite production of the utility model comprises a bottom plate 1, a bracket 2, a cleaning cylinder 3, a supporting frame 4, a gas transmission shaft 5, a plurality of groups of stirring sheets 6, a filter plate 7, a blowing device, a gas supply device and a rotating device, wherein the cleaning cylinder 3 is arranged at the upper end of the bottom plate 1 through the bracket 2, the outer side wall of the cleaning cylinder 3 is coated with the heat tracing belt, a thermometer is arranged on the cleaning cylinder 3, a cavity is arranged in the cleaning cylinder 3, the upper end of the cleaning cylinder 3 is provided with an opening, the lower part of the cleaning cylinder 3 is provided with a drain pipe communicated with the cavity, a valve is arranged on the drain pipe, the cleaning cylinder 3 is provided with a material taking opening communicated with the cavity, a sealing door is arranged outside the material taking opening, the supporting frame 4 is arranged on the bracket 2, the upper part of the gas transmission shaft 5 is rotatably arranged on the supporting frame 4, the plurality of groups of stirring sheets 6 are fixedly arranged on the gas transmission shaft 5, the lower part of the gas transmission shaft 5 is communicated with the blowing device, the plurality of groups of stirring sheets 6 are both positioned in the cavity of the cleaning cylinder 3, the upper part of the gas transmission shaft 5 is communicated with the gas transmission device, the gas transmission device is arranged on the filter plate 7 is rotatably arranged on the filter plate 7, and the filter plate is rotatably arranged on the upper part of the filter plate 7, and is rotatably arranged on the filter plate 4.
When solid pseudo-boehmite is washed, firstly, the solid pseudo-boehmite is put into a cavity of a washing cylinder 3, then hot water is added into the cavity of the washing cylinder 3, a rotating device is opened, the rotating device drives a gas transmission shaft 5 to rotate, the gas transmission shaft 5 drives a plurality of groups of stirring pieces 6 to rotate, the plurality of groups of stirring pieces 6 promote contact between the hot water and the pseudo-boehmite in the cavity of the washing cylinder 3 in the rotating process, so that the hot water washes alkali liquor on the surface of the pseudo-boehmite, meanwhile, an air supply device is opened, the air supply device supplies air to the air supply device through the gas transmission shaft 5, then the air supply device blows air to the lower part of the cavity of the washing cylinder 3, so that the gas blows up the pseudo-boehmite precipitated in the lower part of the cavity of the washing cylinder 3, the pseudo-boehmite is suspended in the cavity of the washing cylinder 3, and bubbles formed by the blown air play a role of preventing the pseudo-boehmite from precipitating in the upward motion process, the pseudo-boehmite is fully contacted and washed with the water in the cavity of the washing cylinder 3, when the pseudo-boehmite is washed, firstly, the water drain pipe is opened, the valve is opened, the water drain pipe is opened, the pseudo-boehmite is discharged through the filter plate 7, and the filter plate 7 is cleaned after the drain pipe is opened, and the filter plate is cleaned, and the filter plate 7 is taken out; the device can prevent the precipitation of the pseudo-boehmite during the cleaning process of the pseudo-boehmite, promotes the contact between the pseudo-boehmite and water, and has good cleaning effect, convenient use and high practicability.
As shown in fig. 2, the blowing device comprises an exhaust pipe 8 and a plurality of groups of air ejector pipes 9, the lower end of the gas transmission shaft 5 is communicated with the exhaust pipe 8, the exhaust pipe 8 is provided with the plurality of groups of air ejector pipes 9, the plurality of groups of air ejector pipes 9 are communicated with the exhaust pipe 8, and a plurality of groups of one-way valves 18 are respectively arranged on the plurality of groups of air ejector pipes 9;
the air supply device comprises a rotary joint 15, an air supply pipe 16 and a blower 17, wherein the rotary joint 15 is fixedly arranged on the supporting frame 4, the upper end of the air transmission shaft 5 is rotatably arranged on the rotary joint 15, the upper end of the air transmission shaft 5 is communicated with the rotary joint 15, the input end of the rotary joint 15 is connected with the blower 17 through the air supply pipe 16, and the blower 17 is fixedly arranged on the supporting frame 4;
when blowing air to the lower part of the cavity of the cleaning cylinder 3, the air blower 17 is turned on, the air blower 17 supplies air to the rotary joint 15 through the air supply pipe 16, then the air sequentially enters the plurality of groups of air injection pipes 9 through the rotary joint 15, the air supply shaft 5 and the exhaust pipe 8, and then the air is blown to the lower part of the cavity of the cleaning cylinder 3 through the plurality of groups of air injection pipes 9; it is convenient to blow air to the lower part of the cavity of the cleaning cylinder 3.
As shown in fig. 1 and 2, the rotating device comprises a bevel gear a10, a bevel gear B11, a rotating shaft 12, a fixed plate 13 and a servo motor 14, wherein the bevel gear a10 is fixedly sleeved on a gas transmission shaft 5, the bevel gear a10 is meshed with the bevel gear B11, the bevel gear B11 is fixedly arranged on the rotating shaft 12, the rotating shaft 12 is rotatably arranged on the fixed plate 13 and the supporting frame 4, the fixed plate 13 is fixedly arranged on the supporting frame 4, the right end of the rotating shaft 12 is connected with the output end of the servo motor 14, and the servo motor 14 is arranged on the supporting frame 4;
when the gas transmission shaft 5 is rotated, the servo motor 14 is turned on, the servo motor 14 rotates the bevel gear B11 through the rotating shaft 12, and the bevel gear B11 drives the gas transmission shaft 5 to rotate through the bevel gear A10; the rotation of the gas transmission shaft 5 is facilitated.
Example 2
On the basis of embodiment 1, the rotating device is replaced by two sets of gears and one driving motor; the two groups of gears are respectively arranged on the gas transmission shaft 5 and the driving motor and are meshed with each other; the driving motor drives one group of gears to rotate, so that the other group of gears rotate and the gas transmission shaft 5 is driven to rotate.
What needs to be stated is: the volume of pseudo-boehmite added into the cavity of the cleaning cylinder 3 is smaller and can be blown up by gas.
The filter plate 7, the servo motor 14, the rotary joint 15, the blower 17 and the one-way valve 18 of the intermediate washing tank for pseudo-boehmite production are all purchased in the market, and the filter plate, the servo motor, the rotary joint 15, the blower 17 and the one-way valve 18 are installed and operated by a person skilled in the art according to the attached use instruction without creative labor of the person skilled in the art.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (7)
1. The middle washing tank for pseudo-boehmite production comprises a bottom plate (1), a support (2) and a washing barrel (3), wherein the washing barrel (3) is arranged at the upper end of the bottom plate (1) through the support (2), a cavity is formed in the washing barrel (3), a drain pipe communicated with the cavity is arranged at the lower part of the washing barrel (3), a valve is arranged on the drain pipe, a material taking opening communicated with the cavity is formed in the washing barrel (3), and a sealing door is arranged outside the material taking opening; the filter is characterized by further comprising a supporting frame (4), a gas transmission shaft (5), a plurality of groups of stirring sheets (6), a filter plate (7), a gas blowing device, a gas supply device and a rotating device, wherein the supporting frame (4) is installed on the support (2), the upper part of the gas transmission shaft (5) is rotatably installed on the supporting frame (4), the plurality of groups of stirring sheets (6) are fixedly installed on the gas transmission shaft (5), the lower part of the gas transmission shaft (5) is communicated with the gas blowing device, the gas blowing device and the plurality of groups of stirring sheets (6) are located in a cavity of the cleaning cylinder (3), the upper part of the gas transmission shaft (5) is communicated with the gas supply device, the gas supply device is used for conveying gas to the gas transmission shaft (5), the rotating device is installed on the supporting frame (4), the filter plate (7) is installed on the lower part of the cavity of the cleaning cylinder (3), and filter cloth is arranged on the filter plate (7).
2. The intermediate washing tank for pseudo-boehmite production according to claim 1, characterized in that the blowing device comprises an exhaust pipe (8) and a plurality of groups of air ejector pipes (9), the lower end of the gas transmission shaft (5) is communicated with the exhaust pipe (8), the plurality of groups of air ejector pipes (9) are arranged on the exhaust pipe (8), and the plurality of groups of air ejector pipes (9) are all communicated with the exhaust pipe (8).
3. The intermediate washing tank for pseudo-boehmite production according to claim 1, characterized in that the rotating device comprises a bevel gear a (10), a bevel gear B (11), a rotating shaft (12), a fixed plate (13) and a servo motor (14), wherein the bevel gear a (10) is fixedly sleeved on a gas transmission shaft (5), the bevel gear a (10) is meshed with the bevel gear B (11), the bevel gear B (11) is fixedly mounted on the rotating shaft (12), the rotating shaft (12) is rotatably mounted on the fixed plate (13) and the supporting frame (4), the fixed plate (13) is fixedly mounted on the supporting frame (4), the right end of the rotating shaft (12) is connected with the output end of the servo motor (14), and the servo motor (14) is mounted on the supporting frame (4).
4. The intermediate water washing tank for pseudo-boehmite production according to claim 1, characterized in that the air supply device comprises a rotary joint (15), an air supply pipe (16) and a blower (17), the rotary joint (15) is fixedly arranged on the supporting frame (4), the upper end of the air supply shaft (5) is rotatably arranged on the rotary joint (15), the upper end of the air supply shaft (5) is communicated with the rotary joint (15), and the input end of the rotary joint (15) is connected with the blower (17) through the air supply pipe (16), and the blower (17) is fixedly arranged on the supporting frame (4).
5. Intermediate washing tank for pseudo-boehmite production according to claim 2, characterized in that it further comprises a plurality of sets of one-way valves (18), the plurality of sets of one-way valves (18) being mounted on the plurality of sets of air ejector tubes (9) respectively.
6. Intermediate washing tank for pseudo-boehmite production according to claim 1 characterized in that it further comprises a heat tracing band, which is coated on the outer side wall of the washing cylinder (3).
7. Intermediate washing tank for pseudo-boehmite production according to claim 1, characterized in that the washing cylinder (3) is provided with a thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321212155.2U CN219723910U (en) | 2023-05-17 | 2023-05-17 | Intermediate washing tank for pseudo-boehmite production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321212155.2U CN219723910U (en) | 2023-05-17 | 2023-05-17 | Intermediate washing tank for pseudo-boehmite production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219723910U true CN219723910U (en) | 2023-09-22 |
Family
ID=88051768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321212155.2U Active CN219723910U (en) | 2023-05-17 | 2023-05-17 | Intermediate washing tank for pseudo-boehmite production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219723910U (en) |
-
2023
- 2023-05-17 CN CN202321212155.2U patent/CN219723910U/en active Active
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