CN220176039U - Concentration equipment is used in shikimic acid processing - Google Patents
Concentration equipment is used in shikimic acid processing Download PDFInfo
- Publication number
- CN220176039U CN220176039U CN202321246186.XU CN202321246186U CN220176039U CN 220176039 U CN220176039 U CN 220176039U CN 202321246186 U CN202321246186 U CN 202321246186U CN 220176039 U CN220176039 U CN 220176039U
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- China
- Prior art keywords
- storage tank
- liquid storage
- heater
- wall
- shikimic acid
- Prior art date
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- JXOHGGNKMLTUBP-HSUXUTPPSA-N shikimic acid Chemical compound O[C@@H]1CC(C(O)=O)=C[C@@H](O)[C@H]1O JXOHGGNKMLTUBP-HSUXUTPPSA-N 0.000 title claims abstract description 42
- JXOHGGNKMLTUBP-JKUQZMGJSA-N shikimic acid Natural products O[C@@H]1CC(C(O)=O)=C[C@H](O)[C@@H]1O JXOHGGNKMLTUBP-JKUQZMGJSA-N 0.000 title claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 94
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 14
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 abstract description 46
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 abstract description 23
- 235000019253 formic acid Nutrition 0.000 abstract description 23
- 239000011550 stock solution Substances 0.000 abstract description 20
- 238000004090 dissolution Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000006193 liquid solution Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses concentration equipment for shikimic acid processing, which comprises a bottom plate, universal wheels are arranged at corner positions of the bottom end of the bottom plate, side plates are arranged on two sides of the top end of the bottom plate, a transverse plate is fixed on the inner wall between the side plates, a liquid storage tank is arranged at the top end of the bottom plate below the transverse plate, a heater is arranged at the top end of the transverse plate at the position of the liquid storage tank, an evaporator is arranged at the top end of the transverse plate at one side of the heater, a condenser is arranged at the top end of the transverse plate at one side, far from the heater, of the evaporator, an overflow pipe is arranged at the central position of the bottom of the condenser, one end, far from the condenser, of the overflow pipe extends into the liquid storage tank, a stirring shaft is rotatably connected at the central position of the interior of the liquid storage tank, and equidistant stirring blades are arranged on the outer walls of the two sides of the stirring shaft. The utility model not only improves the dissolution efficiency between the shikimic acid stock solution and the formic acid in the liquid storage tank, but also facilitates the quantitative injection of the shikimic acid stock solution and the formic acid into the liquid storage tank, and improves the stability of the concentration equipment in use.
Description
Technical Field
The utility model relates to the technical field of shikimic acid concentration, in particular to concentration equipment for shikimic acid processing.
Background
The high-efficiency shikimic acid concentration process with reference to publication No. CN111548265A comprises the following steps that raw materials are firstly put into a middle tank and are leached into shikimic acid solution by 4% formic acid in the middle tank, then the solution is heated by a heater, the heating temperature is 70 ℃, the solution after leaching is pumped from the bottom of the middle tank by adopting a forced circulation pump and enters the bottom of the heater, the solution walks upwards from the bottom of the heater, a gas-liquid mixture is formed when the solution reaches an outlet at the top of the heater in the whole process, the gas-liquid mixture in the heater is conveyed into an evaporator, the vacuum degree in the evaporator is-60 kPa, the temperature is 70 ℃, the flash evaporation is carried out, the process is perfect, the operation is convenient, the service life of system equipment is long, the production requirement is met, the whole system is in a fully closed state, condensed water generated by evaporation can be reused for leaching, the effective utilization of resources is facilitated, under the condition that no steam is adopted, the solution can be effectively concentrated by adopting boiling water, the concentration process can be better carried out on shikimic acid when the solution reaches the outlet of the top of the heater, the gas-liquid mixture is carried out, the gas-liquid mixture in the process, the process is usually inconveniently, the injection of the shikimic acid into the liquid tank and the raw material liquid is not convenient to be mixed with the liquid solution, and the raw material liquid is always quantitatively stirred with the liquid formic acid solution, and the raw material is conveniently and the liquid is quantitatively mixed with the liquid and is difficult to be conveniently and mixed with the raw formic acid liquid solution in the liquid tank, and is usually and stored in the liquid storage state because the process is usually.
Disclosure of Invention
The utility model aims to provide a concentration device for shikimic acid processing, which solves the problems that the concentration device can better perform concentration process treatment on shikimic acid, but is generally inconvenient to stir shikimic acid stock solution and formic acid which are injected into a liquid storage tank, so that the dissolution efficiency between the shikimic acid stock solution and the formic acid is general, the liquid level of the shikimic acid stock solution and the formic acid in the liquid storage tank is inconvenient to monitor, and the quantitative injection of the shikimic acid stock solution and the formic acid into the liquid storage tank is inconvenient.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a shikimic acid processing concentration device, includes the bottom plate, universal wheels are all installed in the corner position department of bottom plate bottom, both sides on bottom plate top all are equipped with the curb plate, be fixed with the diaphragm on the inner wall between the curb plate, the bottom plate top of diaphragm below is equipped with holds the fluid reservoir, the diaphragm top of holding fluid reservoir position department is equipped with the heater, the diaphragm top of heater one side is equipped with the evaporimeter, the diaphragm top that the evaporimeter kept away from heater one side is equipped with the condenser, the central point department of condenser bottom is equipped with the overflow pipe, the one end that the overflow pipe kept away from the condenser extends to the inside of holding the fluid reservoir, the inside central point department rotation of holding the fluid reservoir is connected with the (mixing) shaft, all be equipped with equidistant stirring vane on the outer wall of (mixing) shaft both sides, the central point department at holding fluid reservoir top installs rotary driving piece, the bottom end of the rotary driving piece extends to the inside of the liquid storage tank and is fixedly connected with the top end of the stirring shaft, the top end of the liquid storage tank on one side of the rotary driving piece is provided with a material injection port, the bottom end of the material injection port extends to the inside of the liquid storage tank, the inner wall on one side of the liquid storage tank is provided with a storage plate, the outer wall of the storage plate is provided with a liquid level meter, the outer walls of the storage plates at two ends of the liquid level meter are provided with positioning pins, one end of each positioning pin penetrates through the storage plate and is connected with the inner wall of the liquid storage tank, the outer wall of the liquid storage tank below the overflow pipe is provided with a material discharge port, one end of the material discharge port extends to the inside of the liquid storage tank, the inner wall of the side plate below the overflow pipe is provided with a control panel, the output end of the single chip microcomputer inside the control panel is electrically connected with the input end of the rotary driving piece, the input end of the singlechip in the control panel is electrically connected with the output end of the liquid level meter.
Preferably, the circulating pump is installed on the diaphragm top of one side of the heater keeping away from the evaporator, one end of the circulating pump is communicated with the outer wall of the heater through the guide pipe, the other end of the circulating pump extends to the bottom of the liquid storage tank through the guide pipe, and the input end of the circulating pump is electrically connected with the output end of the single chip microcomputer in the control panel so as to convey mixed liquid in the liquid storage tank to the inside of the heater.
Preferably, a first flow pipe is arranged at the center position of the top of the heater, and one end of the first flow pipe, which is far away from the heater, is communicated with the outer wall of the evaporator, so that the gas-liquid mixture in the heater flows into the evaporator through the first flow pipe.
Preferably, a second flow pipe is arranged at the center of the top of the evaporator, and one end of the second flow pipe, which is far away from the evaporator, is communicated with the top of the condenser, so that steam inside the evaporator flows into the condenser through the second flow pipe.
Preferably, the outer walls of the side plates on one side of the universal wheel are provided with positioning seats, and one side of the top end of each positioning seat is provided with a thread cylinder so as to carry out arrangement treatment on the threaded rod.
Preferably, the inside threaded connection of screw thread section of thick bamboo has the threaded rod, the bottom of threaded rod runs through the positioning seat and rotates and be connected with anti-skidding pad seat, the top of threaded rod extends to the outside of screw thread section of thick bamboo and is equipped with two sets of turnhandles to reach skid-proof purpose.
Compared with the prior art, the utility model has the beneficial effects that: the concentration equipment for shikimic acid processing not only improves the dissolution efficiency between shikimic acid stock solution and formic acid in the liquid storage tank, but also facilitates quantitative injection of the shikimic acid stock solution and the formic acid into the liquid storage tank, and improves the stability of the concentration equipment during use;
(1) The shikimic acid stock solution and the formic acid are sequentially injected into the liquid storage tank through the material injection port, and then the stirring blades are driven to rotate by the rotary driving piece through the stirring shaft, so that the shikimic acid stock solution and the formic acid in the liquid storage tank can be stirred through the stirring blades, and the dissolution efficiency between the shikimic acid stock solution and the formic acid in the liquid storage tank is improved;
(2) One end of the locating pin penetrates through the object placing plate and is connected to the inner wall of the liquid storage tank, the liquid level meter can be arranged in the liquid storage tank through the object placing plate, when shikimic acid stock solution and formic acid are injected into the liquid storage tank, the liquid level of the shikimic acid stock solution and the formic acid can be monitored through the liquid level meter, and related data are fed back to the control panel and displayed for people to watch, so that the shikimic acid stock solution and the formic acid can be conveniently and quantitatively injected into the liquid storage tank;
(3) Through rotating the rotating handle, the threaded rod is driven to rotate in the threaded cylinder and slide downwards, so that the threaded rod drives the anti-slip pad seat to move downwards and contact the ground, the anti-slip aim can be achieved, and further the phenomenon that displacement is generated in the use process of the concentrating equipment can be reduced, and the use stability of the concentrating equipment is improved.
Drawings
FIG. 1 is a schematic diagram of the front view of the present utility model;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;
FIG. 3 is a schematic cross-sectional view of a fluid reservoir according to the present utility model;
fig. 4 is a schematic side view of the storage board of the present utility model.
In the figure: 1. a bottom plate; 2. a liquid storage tank; 3. a heater; 4. an evaporator; 5. a condenser; 6. a side plate; 7. a cross plate; 8. a circulation pump; 9. a first flow tube; 10. a second flow tube; 11. an overflow pipe; 12. a discharge port; 13. a universal wheel; 14. a thread cylinder; 15. a rotating handle; 16. an anti-skid pad seat; 17. a threaded rod; 18. a rotary driving member; 19. a material injection port; 20. a stirring shaft; 21. stirring blades; 22. a storage plate; 23. a liquid level gauge; 24. a positioning pin; 25. a control panel; 26. and a positioning seat.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-4, an embodiment of the present utility model is provided: the shikimic acid processing concentration equipment comprises a bottom plate 1, universal wheels 13 are arranged at corner positions of the bottom end of the bottom plate 1, positioning seats 26 are arranged on the outer walls of side plates 6 on one side of the universal wheels 13, and a thread cylinder 14 is arranged on one side of the top end of each positioning seat 26;
in use, the threaded rod 17 is arranged by arranging the threaded cylinder 14 at the top end of the positioning seat 26;
the inside of the threaded cylinder 14 is in threaded connection with a threaded rod 17, the bottom end of the threaded rod 17 penetrates through a positioning seat 26 and is rotationally connected with an anti-skid pad seat 16, and the top end of the threaded rod 17 extends to the outside of the threaded cylinder 14 and is provided with two groups of rotating handles 15;
when in use, the anti-skid pad seat 16 moves downwards and contacts the ground so as to achieve the aim of skid resistance;
the two sides of the top end of the bottom plate 1 are provided with side plates 6, a transverse plate 7 is fixed on the inner wall between the side plates 6, the top end of the bottom plate 1 below the transverse plate 7 is provided with a liquid storage tank 2, the top end of the transverse plate 7 at the position of the liquid storage tank 2 is provided with a heater 3, the center position of the top of the heater 3 is provided with a first flow pipe 9, and one end of the first flow pipe 9 far away from the heater 3 is communicated with the outer wall of the evaporator 4;
in use, the gas-liquid mixture in the heater 3 flows into the evaporator 4 through the first flow pipe 9 by opening the valve on the outer wall of the first flow pipe 9;
the top end of the transverse plate 7 at one side of the heater 3 far away from the evaporator 4 is provided with a circulating pump 8, one end of the circulating pump 8 is communicated with the outer wall of the heater 3 through a conduit, the other end of the circulating pump 8 extends to the bottom of the liquid storage tank 2 through a conduit, and the input end of the circulating pump 8 is electrically connected with the output end of the singlechip in the control panel 25;
in use, the circulation pump 8 is turned on to convey the mixed liquid in the liquid storage tank 2 to the inside of the heater 3;
the top end of the transverse plate 7 at one side of the heater 3 is provided with an evaporator 4, the center position of the top of the evaporator 4 is provided with a second flow pipe 10, and one end of the second flow pipe 10 away from the evaporator 4 is communicated with the top of the condenser 5;
in use, the steam inside the evaporator 4 flows into the condenser 5 through the second flow pipe 10 by opening the valve on the outer wall of the second flow pipe 10;
the top end of the transverse plate 7, which is far away from one side of the heater 3, of the evaporator 4 is provided with a condenser 5, the center position of the bottom of the condenser 5 is provided with an overflow pipe 11, and one end, which is far away from the condenser 5, of the overflow pipe 11 extends into the liquid storage tank 2;
the central position inside the liquid storage tank 2 is rotationally connected with a stirring shaft 20, the outer walls of the two sides of the stirring shaft 20 are provided with equidistant stirring blades 21, the central position at the top end of the liquid storage tank 2 is provided with a rotary driving piece 18, and the bottom end of the rotary driving piece 18 extends into the liquid storage tank 2 and is fixedly connected with the top end of the stirring shaft 20;
the top end of the liquid storage tank 2 at one side of the rotary driving piece 18 is provided with a material injection port 19, and the bottom end of the material injection port 19 extends to the inside of the liquid storage tank 2;
the inner wall of one side of the liquid storage tank 2 is provided with a storage plate 22, the outer wall of the storage plate 22 is provided with a liquid level meter 23, the outer walls of the storage plates 22 at two ends of the liquid level meter 23 are provided with positioning pins 24, and one end of each positioning pin 24 penetrates through the storage plate 22 and is connected with the inner wall of the liquid storage tank 2;
a discharge port 12 is arranged on the outer wall of the liquid storage tank 2 below the overflow pipe 11, and one end of the discharge port 12 extends into the liquid storage tank 2;
a control panel 25 is arranged on the inner wall of the side plate 6 below the overflow pipe 11, the output end of the single-chip microcomputer inside the control panel 25 is electrically connected with the input end of the rotary driving piece 18, and the input end of the single-chip microcomputer inside the control panel 25 is electrically connected with the output end of the liquid level meter 23.
When the embodiment of the utility model is used, the shikimic acid stock solution and the formic acid are sequentially injected into the liquid storage tank 2 through the material injection port 19, then the stirring blade 21 is driven by the rotary driving piece 18 through the stirring shaft 20 to rotate, the shikimic acid stock solution and the formic acid in the liquid storage tank 2 can be stirred through the stirring blade 21 so as to improve the dissolution efficiency between the shikimic acid stock solution and the formic acid, one end of the positioning pin 24 penetrates the material placing plate 22 and is connected with the inner wall of the liquid storage tank 2, the liquid level meter 23 can be arranged in the liquid storage tank 2 through the material placing plate 22, when the shikimic acid stock solution and the formic acid are injected into the liquid storage tank 2, the liquid level of the shikimic acid stock solution and the formic acid can be monitored through the liquid level meter 23, and related data are fed back to the control panel 25 and displayed for viewing, so that personnel can quantitatively inject the shikimic acid stock solution and the formic acid into the liquid storage tank 2, the liquid in the liquid storage tank 2 can be conveyed to the inside of the heater 3 through the circulating pump 8 to be heated, the gas-liquid mixture generated in the heater 3 flows into the evaporator 4 through the first flow pipe 9 to be evaporated, then flows into the condenser 5 through the second flow pipe 10 to be cooled, crystalline particles can be formed and fall into the liquid storage tank 2 through the overflow pipe 11 after cooling is finished, the process is continuously carried out until the material in the liquid storage tank 2 is completely crystalline, at the moment, the circulating pump 8 cannot suck and convey the material in the liquid storage tank 2, namely, the shikimic acid is concentrated, the discharge port 12 is opened to discharge the shikimic acid, finally, the threaded rod 17 is driven to rotate and slide downwards in the threaded cylinder 14 through the rotating handle 15, so that the threaded rod 17 drives the anti-skid pad 16 to move downwards and contact with the ground, the purpose of skid resistance can be achieved, so that the stability of the concentration equipment is improved, and the use of the concentration equipment is completed.
Claims (6)
1. The utility model provides a shikimic acid processing concentration equipment, its characterized in that, including bottom plate (1), universal wheel (13) are all installed in the corner position department of bottom plate (1) bottom, the both sides on bottom plate (1) top all are equipped with curb plate (6), be fixed with diaphragm (7) on the inner wall between curb plate (6), bottom plate (1) top of diaphragm (7) below is equipped with holds fluid reservoir (2), the diaphragm (7) top of fluid reservoir (2) position department is equipped with heater (3), diaphragm (7) top of heater (3) one side is equipped with evaporimeter (4), diaphragm (7) top of heater (4) one side of keeping away from is equipped with condenser (5), the central point department of condenser (5) bottom is equipped with overflow pipe (11), the one end that condenser (5) were kept away from in overflow pipe (11) extends to the inside of fluid reservoir (2), the inside central point department rotation of fluid reservoir (2) is connected with (20), the blade (21) of both sides on the outer wall of fluid reservoir (20) are equipped with equidistant fluid reservoir (21), the drive position of fluid reservoir (18), the bottom end of the rotary driving piece (18) extends to the inside of the liquid storage tank (2) and is fixedly connected with the top end of the stirring shaft (20), the top end of the liquid storage tank (2) at one side of the rotary driving piece (18) is provided with a material injection port (19), the bottom end of the material injection port (19) extends to the inside of the liquid storage tank (2), a storage plate (22) is arranged on the inner wall at one side of the liquid storage tank (2), a liquid level meter (23) is arranged on the outer wall of the storage plate (22), positioning pins (24) are arranged on the outer walls of the storage plates (22) at two ends of the liquid level meter (23), one end of the locating pin (24) penetrates through the storage plate (22) and is connected with the inner wall of the liquid storage tank (2), a discharge opening (12) is formed in the outer wall of the liquid storage tank (2) below the overflow pipe (11), one end of the discharge opening (12) extends to the inside of the liquid storage tank (2), a control panel (25) is mounted on the inner wall of the side plate (6) below the overflow pipe (11), the output end of the single chip microcomputer inside the control panel (25) is electrically connected with the input end of the rotary driving piece (18), and the input end of the single chip microcomputer inside the control panel (25) is electrically connected with the output end of the liquid level meter (23).
2. The shikimic acid processing concentration device of claim 1, wherein: the utility model discloses a heating device, including heating device, control panel (25), heater (3), circulating pump (8) are installed on diaphragm (7) top of keeping away from evaporimeter (4) one side, the one end of circulating pump (8) is linked together through the outer wall of pipe and heater (3), the other end of circulating pump (8) extends to the bottom of holding fluid reservoir (2) through the pipe, the input of circulating pump (8) and the output electric connection of control panel (25) inside singlechip.
3. The shikimic acid processing concentration device of claim 1, wherein: the central position at the top of the heater (3) is provided with a first flow pipe (9), and one end of the first flow pipe (9) far away from the heater (3) is communicated with the outer wall of the evaporator (4).
4. The shikimic acid processing concentration device of claim 1, wherein: the central position at the top of the evaporator (4) is provided with a second flow pipe (10), and one end of the second flow pipe (10) far away from the evaporator (4) is communicated with the top of the condenser (5).
5. The shikimic acid processing concentration device of claim 1, wherein: the outer walls of the side plates (6) on one side of the universal wheel (13) are provided with positioning seats (26), and one side of the top ends of the positioning seats (26) is provided with a thread cylinder (14).
6. The shikimic acid processing concentration device as claimed in claim 5, wherein: the inside threaded connection of screw thread section of thick bamboo (14) has threaded rod (17), the bottom of threaded rod (17) runs through positioning seat (26) and rotates and be connected with anti-skidding pad seat (16), the top of threaded rod (17) extends to the outside of screw thread section of thick bamboo (14) and is equipped with two sets of turnhandles (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321246186.XU CN220176039U (en) | 2023-05-17 | 2023-05-17 | Concentration equipment is used in shikimic acid processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321246186.XU CN220176039U (en) | 2023-05-17 | 2023-05-17 | Concentration equipment is used in shikimic acid processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220176039U true CN220176039U (en) | 2023-12-15 |
Family
ID=89100919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321246186.XU Active CN220176039U (en) | 2023-05-17 | 2023-05-17 | Concentration equipment is used in shikimic acid processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220176039U (en) |
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2023
- 2023-05-17 CN CN202321246186.XU patent/CN220176039U/en active Active
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