CN210410361U - Agitator tank is used in ammonium paratungstate production - Google Patents
Agitator tank is used in ammonium paratungstate production Download PDFInfo
- Publication number
- CN210410361U CN210410361U CN201920898816.9U CN201920898816U CN210410361U CN 210410361 U CN210410361 U CN 210410361U CN 201920898816 U CN201920898816 U CN 201920898816U CN 210410361 U CN210410361 U CN 210410361U
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- Prior art keywords
- tank body
- stirring
- motor
- tank
- shaft
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 210000001503 joint Anatomy 0.000 claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims description 26
- 238000003466 welding Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000243 solution Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- 230000002337 anti-port Effects 0.000 description 3
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 150000003658 tungsten compounds Chemical class 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
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- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The utility model discloses a stirring tank for ammonium paratungstate production, which comprises a tank body, a tank body supporting structure, a main stirring mechanism and an auxiliary stirring mechanism; the main body of the tank body is of a cylindrical structure, and conical end covers are welded and fixed at the upper and lower bottom ports of the main body of the tank body; the charge door that is linked together rather than inside is seted up to the side top position of the jar body, and the outer port of charge door has the filling tube that sets up in the slant with welded form butt joint, the utility model discloses utilize pumping mechanism to produce high-pressure liquid column, the relative reverse striking between high-pressure liquid column and the reverse vortex produces better stirring effect, and this kind of structure has not only reduced the inside degree of charge of the jar body, has also avoided the slow condition of local solution velocity of flow simultaneously, adopts the form of this kind of opposite directions also needn't let frequent operations such as motor deceleration speed reduction, and holistic system complexity is simple relatively like this, and the cost is lower.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry and specifically relates to an agitator tank is used in ammonium paratungstate production.
Background
Ammonium paratungstate is a chemical substance, mainly white crystal, has two kinds of sheet or needle, and is used for manufacturing metal tungsten powder made of tungsten trioxide or blue tungsten oxide. It is also used for preparing ammonium metatungstate and other tungsten compounds, and is used as additive in petrochemical industry.
Ammonium paratungstate adopts the form of evaporative crystallization to separate out more in the actual production process and obtains the crystal, need carry out abundant stirring to the stoste before the evaporative crystallization, and current mixer adopts one-way agitated vessel more, cooperate the baffling board of the internal portion of agitator tank to assist afterwards and carry out baffling backmixing, because the baffling board itself occupies great space in the internal portion of jar, this kind of structure easily leads to baffling board and jar body combination position to appear the relatively poor condition of solution flow effect, thereby influence actual stirring effect, and adopt a series of operations such as motor deceleration that the positive and negative rotation of agitator motor changes the moving mode needs, wholly damage the motor easily, and efficiency is relatively poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an excellent agitator tank is used in ammonium paratungstate production of stirring effect.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a stirring tank for ammonium paratungstate production comprises a tank body, a tank body supporting structure, a main stirring mechanism and an auxiliary stirring mechanism;
the main body of the tank body is of a cylindrical structure, and conical end covers are welded and fixed at the upper and lower bottom ports of the main body of the tank body; a charging opening communicated with the inside of the tank body is formed in the upper position of the side face of the tank body, an outer port of the charging opening is in butt joint with a charging pipe arranged obliquely upwards in a welding mode, a port of the charging pipe is in threaded connection with a material cover for plugging the port, and charging to the inside of the tank body is realized by using the charging pipe; the center of the bottom end cover of the tank body is provided with a vertically through discharge hole, the outer port of the discharge hole is butted with a main discharge pipe in a welding mode, the outlet end of the main discharge pipe is butted with the feed inlet of a three-way valve, and the other two discharge holes of the three-way valve are respectively butted with a discharge pipe and a return pipe;
the tank body supporting structure comprises a plurality of transverse supporting columns welded on the outer wall of the tank body, the transverse supporting columns are provided with vertical supporting columns in one-to-one correspondence, the vertical supporting columns are fixedly welded at one end of each transverse supporting column far away from the tank body, and the supporting structure formed by the vertical supporting columns and the transverse supporting columns is used for supporting and installing the tank body;
the main stirring mechanism comprises a stirring motor, a shaft seat mounting hole which is through up and down is formed in the center of the upper end cover of the tank body, a shaft seat is fixedly mounted in the shaft seat mounting hole in an embedded mounting and auxiliary welding mode, and a coaxial structure is formed between the shaft hole of the shaft seat and the tank body; a motor mounting plate with a central hole is fixedly welded on the upper surface of the shaft seat, the stirring motor is fixedly mounted on the motor mounting plate by bolts, a motor shaft of the stirring motor sequentially penetrates into the tank body from top to bottom through the central hole of the motor mounting plate and a shaft hole of the shaft seat, and the motor shaft and the tank body are in a coaxial structure; the motor shaft and the bearing inner ring in the shaft seat are in a fixed sleeving structure, and the bearing in the shaft seat is utilized to provide the rotation stability of the motor shaft; the lower end of the motor shaft is coaxially connected with a straight rod-shaped rotating shaft in a transmission way through a coupler, the bottom of the rotating shaft is fixedly connected with a U-shaped stirring rod in a welding or screw fixing way, the opening of the stirring rod is upward, and the bottom end of the rotating shaft is fixed at the center of the bottom edge of the stirring rod; the stirring rod is driven to rotate under the action of the stirring motor, so that the material stock solution is stirred, and the stirring motor adopts a one-way constant-speed motor, so that a constant-speed one-way stirring effect is provided;
the auxiliary stirring mechanism adopts a pumping stirring structure and comprises pressure pumps which are arranged at intervals below the tank body, liquid inlet ports of the pressure pumps are butted on an outlet at the tail end of the material return pipe, and at the moment, under the switching action of the three-way valve, the pressure pumps pump out and pressurize and send out raw material liquid in the tank body; the outlet end of the pressure pump is butted with a pumping pipe, and the outlet end of the pumping pipe is butted with a liquid inlet of the annular spray pipe; the annular spray pipe is of an end-to-end annular structure, is coaxially sleeved at the lowest end of the tank body main body, and is fixedly connected with the tank body in a welding mode; a liquid inlet which is in butt joint with the pumping pipe is formed in the outer ring surface of the annular spray pipe; liquid outlet holes are uniformly formed in the inner ring surface of the annular spray pipe at intervals in the circumferential direction, and the liquid outlet holes are in threaded butt joint with spray heads; the outer surface of the tank body is provided with a nozzle hole which is arranged corresponding to the nozzle, the nozzle is inserted into the inner position of the tank body through the nozzle hole, and the joint position of the nozzle and the nozzle hole is sealed and fixed in a welding mode; the spraying direction of the spray heads forms an included angle of 30-45 degrees with the horizontal tangent of the annular spray pipe, and the spray heads are distributed in an equidistant circumferential array; utilize the force (forcing) pump to export stoste pump sending for shower nozzle blowout high-pressure liquid column, produce reverse vortex under main rabbling mechanism antiport afterwards, the relative reverse striking between high-pressure liquid column and the reverse vortex produces better stirring effect this moment, this kind of structure has not only reduced the inside degree of charge of the jar body, the slow condition of local solution velocity of flow has also been avoided simultaneously, the form of adopting this kind of hedging also needn't let motor slow down etc. frequently operate frequently, holistic system complexity is simple relatively like this, the cost is lower.
As a further aspect of the present invention: the stirring motor and the pressure pump are both connected with a 220V alternating current power supply.
As a further aspect of the present invention: the annular spray pipe is made of galvanized stainless steel.
As a further aspect of the present invention: the spray heads are arranged at the lower position of the stirring rod at intervals.
As a further aspect of the present invention: the stirring rod and the inner surface of the tank body are arranged at intervals.
Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model discloses utilize pumping mechanism to produce high-pressure liquid column, the relative reverse striking between high-pressure liquid column and the reverse vortex produces better stirring effect, and this kind of structure has not only reduced the inside degree of charge of the jar body, has also avoided the slow condition of local solution velocity of flow simultaneously, and the form of adopting this kind of opposite directions also needn't let motor deceleration slow down etc. frequently operate, and holistic system complexity is simple relatively like this, and the cost is lower.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partial perspective view of the present invention.
Fig. 3 is a schematic view of a partial structure of the present invention.
The labels in the figures are: 1-tank body, 2-transverse supporting column, 3-vertical supporting column, 4-material cover, 5-feeding pipe, 6-stirring motor, 7-motor mounting plate, 8-shaft seat, 9-main discharging pipe, 10-discharging pipe, 11-three-way valve, 12-material returning pipe, 13-pressure pump, 14-pumping pipe, 15-annular spraying pipe, 16-motor shaft, 17-coupler, 18-rotating shaft, 19-stirring rod, 20-nozzle hole and 21-nozzle.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the following description is made for the technical solution of the present invention in the embodiments to explain the present invention clearly and completely, obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments.
Referring to fig. 1 to 3, in an embodiment of the present invention, an agitator tank for producing ammonium paratungstate includes a tank body 1, a tank body support structure, a main agitating mechanism and an auxiliary agitating mechanism;
the main body of the tank body 1 is of a cylindrical structure, and conical end covers are welded and fixed at the upper and lower bottom ports of the main body of the tank body 1; a feeding port communicated with the inside of the tank body 1 is formed in the upper position of the side face of the tank body 1, an outer port of the feeding port is in butt joint with a feeding pipe 5 which is arranged obliquely upwards in a welding mode, a port of the feeding pipe 5 is in threaded connection with a material cover 4 for plugging the port, and feeding to the inside of the tank body 1 is realized by the feeding pipe 5; the central position of the bottom end cover of the tank body 1 is provided with a vertically through discharge hole, the outer port of the discharge hole is butted with a main discharge pipe 9 in a welding mode, the outlet end of the main discharge pipe 9 is butted with the feed inlet of a three-way valve 11, and the other two discharge holes of the three-way valve 11 are respectively butted with a discharge pipe 10 and a return pipe 12;
the tank body supporting structure comprises a plurality of transverse supporting columns 2 welded on the outer wall of a tank body 1, the transverse supporting columns 2 are correspondingly provided with vertical supporting columns 3, the vertical supporting columns 3 are fixedly welded at one end of each transverse supporting column 2 far away from the tank body 1, and the supporting structure formed by the vertical supporting columns 3 and the transverse supporting columns 2 is used for supporting and installing the tank body 1;
the main stirring mechanism comprises a stirring motor 6, a shaft seat mounting hole which is through up and down is formed in the center of an upper end cover of the tank body 1, a shaft seat 8 is fixedly mounted in the shaft seat mounting hole in an embedding and welding manner, and a coaxial structure is formed between a shaft hole of the shaft seat 8 and the tank body 1; a motor mounting plate 7 with a central hole is fixedly welded on the upper surface of the shaft seat 8, the stirring motor 6 is fixedly mounted on the motor mounting plate 7 by bolts, a motor shaft 16 of the stirring motor 6 is movably penetrated into the tank body 1 from top to bottom sequentially through the central hole of the motor mounting plate 7 and the shaft hole of the shaft seat 8, and a coaxial structure is formed between the motor shaft 16 and the tank body 1; a fixed sleeving structure is formed between the motor shaft 16 and a bearing inner ring in the shaft seat 8, and the bearing in the shaft seat 8 is utilized to provide the rotation stability of the motor shaft 16; the lower end of a motor shaft 16 is coaxially connected with a straight rod-shaped rotating shaft 18 through a coupler 17 in a transmission manner, the bottom of the rotating shaft 18 is fixedly connected with a U-shaped stirring rod 19 in a welding or screw fixing manner, the opening of the stirring rod 19 faces upwards, and the bottom end of the rotating shaft 18 is fixed at the center of the bottom edge of the stirring rod 19; the stirring rod 19 is driven to rotate under the action of the stirring motor 6, so that the material stock solution is stirred, and the stirring motor 6 adopts a one-way constant-speed motor, so that a constant-speed one-way stirring effect is provided;
the auxiliary stirring mechanism adopts a pumping stirring structure, the auxiliary stirring mechanism comprises pressure pumps 13, the pressure pumps 13 are arranged at intervals below the tank body 1, liquid inlet ports of the pressure pumps 13 are butted on an outlet at the tail end of the material return pipe 12, and at the moment, under the switching action of the three-way valve 11, the pressure pumps 13 pump out and pressurize and send out raw material liquid in the tank body 1; the outlet end of the pressure pump 13 is butted with a pumping pipe 14, and the outlet end of the pumping pipe 14 is butted with the liquid inlet of the annular nozzle 15; the annular nozzle 15 is in an end-to-end annular structure, the annular nozzle 15 is coaxially sleeved at the lowest end of the tank body main body, and the annular nozzle 15 is fixedly connected with the tank body 1 in a welding mode; a liquid inlet which is in butt joint with the pumping pipe 14 is formed in the outer ring surface of the annular spray pipe 15; liquid outlet holes are uniformly formed in the inner ring surface of the annular spray pipe 15 at equal intervals in the circumferential direction, and the liquid outlet holes are in threaded butt joint with the spray heads 21; a nozzle hole 20 corresponding to the nozzle 21 is formed in the outer surface of the tank body 1, the nozzle 21 is inserted into the inner position of the tank body 1 through the nozzle hole 20, and the joint position of the nozzle 21 and the nozzle hole 20 is sealed and fixed in a welding manner; the spraying direction of the spray heads 21 forms an included angle of 30-45 degrees with the horizontal tangent of the annular spray pipe 15, and the spray heads 21 are distributed in an equidistant circumferential array; utilize force (forcing) pump 13 to export stock solution pump sending for shower nozzle 21 blowout high-pressure liquid column, produce reverse vortex under main rabbling mechanism antiport afterwards, the relative reverse striking between high-pressure liquid column and the reverse vortex produces better stirring effect this moment, this kind of structure has not only reduced the inside degree of charge of jar body 1, the slow condition of local solution velocity of flow has also been avoided simultaneously, the form of adopting this kind of hedging also needn't let motor slow down etc. frequently operate, holistic system complexity is simple relatively like this, the cost is lower.
The stirring motor 6 and the pressure pump 13 are both connected with a 220V alternating current power supply.
The annular nozzle 15 is made of galvanized stainless steel.
The spray heads 21 are arranged at intervals below the stirring rod 19.
The stirring rod 19 and the inner surface of the tank body 1 are arranged at intervals.
The utility model discloses a theory of operation: utilize force (forcing) pump 13 to export stock solution pump sending for shower nozzle 21 blowout high-pressure liquid column, produce reverse vortex under main rabbling mechanism antiport afterwards, the relative reverse striking between high-pressure liquid column and the reverse vortex produces better stirring effect this moment, this kind of structure has not only reduced the inside degree of charge of jar body 1, the slow condition of local solution velocity of flow has also been avoided simultaneously, the form of adopting this kind of hedging also needn't let motor slow down etc. frequently operate, holistic system complexity is simple relatively like this, the cost is lower.
Having thus described the principal technical features and basic principles of the invention, and the advantages thereof, it will be apparent to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other embodiments without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description is described in terms of various embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.
Claims (5)
1. A stirring tank for ammonium paratungstate production comprises a tank body, a tank body supporting structure, a main stirring mechanism and an auxiliary stirring mechanism;
the main body of the tank body is of a cylindrical structure, and conical end covers are welded and fixed at the upper and lower bottom ports of the main body of the tank body; a charging opening communicated with the inside of the tank body is formed in the upper position of the side face of the tank body, an outer port of the charging opening is in butt joint with a charging pipe which is arranged obliquely upwards in a welding mode, a port of the charging pipe is in threaded connection with a material cover for plugging the port, a bottom end cover center position of the tank body is provided with a vertically through type discharging opening, an outer port of the discharging opening is in butt joint with a main discharging pipe in a welding mode, an outlet end of the main discharging pipe is in butt joint with a feeding opening of a three-way valve, and the other two discharging openings of the three-way valve are respectively in butt;
the tank body supporting structure comprises a plurality of transverse supporting columns welded on the outer wall of the tank body, the transverse supporting columns are provided with vertical supporting columns in one-to-one correspondence, and the vertical supporting columns are fixedly welded at one end of each transverse supporting column far away from the tank body;
the main stirring mechanism comprises a stirring motor, a shaft seat mounting hole which is through up and down is formed in the center of the upper end cover of the tank body, a shaft seat is fixedly mounted in the shaft seat mounting hole in an embedded mounting and auxiliary welding mode, and a coaxial structure is formed between the shaft hole of the shaft seat and the tank body; a motor mounting plate with a central hole is fixedly welded on the upper surface of the shaft seat, the stirring motor is fixedly mounted on the motor mounting plate by bolts, a motor shaft of the stirring motor sequentially penetrates into the tank body from top to bottom through the central hole of the motor mounting plate and a shaft hole of the shaft seat, and the motor shaft and the tank body are in a coaxial structure; the motor shaft and the bearing inner ring in the shaft seat are in a fixed sleeving structure, the lower end of the motor shaft is coaxially connected with a straight rod-shaped rotating shaft in a transmission mode through a coupler, the bottom of the rotating shaft is fixedly connected with a U-shaped stirring rod in a welding or screw fixing mode, the opening of the stirring rod is upward, and the bottom end of the rotating shaft is fixed at the center of the bottom edge of the stirring rod;
the auxiliary stirring mechanism is of a pumping stirring structure and comprises pressure pumps, the pressure pumps are arranged at the lower positions of the tank body at intervals, liquid inlet ports of the pressure pumps are in butt joint with outlets at the tail ends of the material return pipes, outlet ends of the pressure pumps are in butt joint with pumping pipes, and outlet ends of the pumping pipes are in butt joint with liquid inlets of the annular spray pipes; the annular spray pipe is of an end-to-end annular structure, is coaxially sleeved at the lowest end of the tank body main body, and is fixedly connected with the tank body in a welding mode; a liquid inlet which is in butt joint with the pumping pipe is formed in the outer ring surface of the annular spray pipe; liquid outlet holes are uniformly formed in the inner ring surface of the annular spray pipe at intervals in the circumferential direction, and the liquid outlet holes are in threaded butt joint with spray heads; the outer surface of the tank body is provided with a nozzle hole which is arranged corresponding to the nozzle, the nozzle is inserted into the inner position of the tank body through the nozzle hole, and the joint position of the nozzle and the nozzle hole is sealed and fixed in a welding mode; the spraying direction of the spray heads forms an included angle of 30-45 degrees with the horizontal tangent of the annular spray pipe, and the spray heads are distributed in an equidistant circumferential array.
2. The stirring tank for ammonium paratungstate production according to claim 1, wherein the stirring motor and the pressurizing pump are both connected with a 220V alternating current power supply.
3. The agitator tank for ammonium paratungstate production according to claim 1, wherein the annular nozzle is made of a galvanized stainless steel material.
4. The stirring tank for producing ammonium paratungstate according to claim 1, wherein the spray heads are arranged at intervals below the stirring rod.
5. The agitator tank for producing ammonium paratungstate according to claim 1, wherein the agitator bar and the inner surface of the tank body are arranged at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920898816.9U CN210410361U (en) | 2019-06-15 | 2019-06-15 | Agitator tank is used in ammonium paratungstate production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920898816.9U CN210410361U (en) | 2019-06-15 | 2019-06-15 | Agitator tank is used in ammonium paratungstate production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210410361U true CN210410361U (en) | 2020-04-28 |
Family
ID=70376277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920898816.9U Expired - Fee Related CN210410361U (en) | 2019-06-15 | 2019-06-15 | Agitator tank is used in ammonium paratungstate production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210410361U (en) |
-
2019
- 2019-06-15 CN CN201920898816.9U patent/CN210410361U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200428 |