CN111454776B - Continuous production device for removing impurities of perfume raw materials by using gas and application method thereof - Google Patents
Continuous production device for removing impurities of perfume raw materials by using gas and application method thereof Download PDFInfo
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- CN111454776B CN111454776B CN202010442978.9A CN202010442978A CN111454776B CN 111454776 B CN111454776 B CN 111454776B CN 202010442978 A CN202010442978 A CN 202010442978A CN 111454776 B CN111454776 B CN 111454776B
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B9/00—Essential oils; Perfumes
- C11B9/02—Recovery or refining of essential oils from raw materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention relates to a continuous production device for removing impurities of a fragrant raw material by using gas and a use method thereof, wherein the continuous production device comprises a raw material containing tank (1), a feeding port (2), a discharging port (3), a gas inlet (4) and a gas outlet (5); a sealing cover (6) is arranged at the top of the raw material containing tank (1); a stirring motor (7) is arranged in the center of the top of the sealing cover (6); the bottom of the stirring motor (7) is connected with the stirring shaft (9) through a connecting flange (8); the stirring shaft (9) is arranged in the raw material containing tank (1) and is of a hollow structure; a plurality of air holes (10) are arranged on the stirring shaft (9); a stirring belt (11) is arranged on the outer wall of the stirring shaft (9) in a surrounding way; etc. According to the invention, the impurities are carried out by introducing high-temperature gas into the raw material containing tank, so that the properties of the raw material are not damaged in the whole impurity removal process, the raw material loss is not caused, the gas can be recycled, and the production cost is saved.
Description
Technical Field
The invention relates to the technical field of spice raw material processing equipment, in particular to a continuous production device for removing impurities from spice raw materials by using gas and a use method thereof.
Background
The natural spice processing means that the spice ingredient information extraction method from the roots, stems, branches, leaves, barks, flowers, fruits, seeds and the like of spice plants mainly comprises steam distillation, solvent extraction (including supercritical carbon dioxide extraction), cold pressing (used for citrus fruits) and the like.
Because the components are mixed, the spice is in a high-impurity low-grade state before processing, a certain solvent is added in a common impurity removing method to dissolve and remove impurities, but the method is complex in operation, and the loss of the spice to raw materials is very large, so that the production cost is increased.
The impurities in the raw materials generally have high volatility, when the raw materials are heated to a certain temperature, the impurity components are volatilized first and discharged into the air, and according to the rule of different volatilization temperatures, the equipment which does not need to add solvents and heats the raw materials in a chip state and realizes impurity removal through gas flow is designed, so that the equipment has a good application prospect.
Disclosure of Invention
The invention aims to avoid the defects of the prior art and provides a continuous production device for removing fragrance raw materials by using gas and a use method thereof, thereby effectively solving the problems of the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a continuous production device for removing impurities of a fragrant raw material by using gas comprises a raw material holding tank, a material feeding port, a material discharging port, a gas inlet and a gas outlet; a sealing cover is arranged at the top of the raw material containing tank; the center of the top of the sealing cover is provided with a stirring motor; the bottom of the stirring motor is connected with the stirring shaft through a connecting flange; the stirring shaft is arranged inside the raw material containing tank and is of a hollow structure; the stirring shaft is provided with a plurality of air holes; a stirring belt is arranged on the outer wall of the stirring shaft in a surrounding way; a bottom cover is arranged at the bottom of the raw material containing tank; the center of the bottom cover is provided with a gas inlet; a taper sleeve is fixedly arranged in the center of the inner part of the bottom cover; the taper sleeve is fixedly arranged at the peripheral edge of the gas inlet; the bottom of the stirring shaft is sleeved outside the taper sleeve; the bottom of the gas inlet is connected with a first gas inlet pipe; the outer wall of the raw material holding tank is provided with an insulating layer; the sealing cover is provided with a material inlet and a gas outlet; the material inlet and the gas outlet are arranged at two sides of the stirring motor; the bottom cover is provided with a discharge hole.
Further, the bottom of the stirring shaft is provided with stirring blades; the bottom of the stirring blade is parallel to the inner plane of the bottom cover.
Further, a feeding channel and a discharging channel are arranged on the feeding port and the discharging port; the tail ends of the feeding channel and the discharging channel are provided with discharging channels.
Further, an interlayer is arranged between the heat preservation layer and the outer wall of the raw material containing tank, and a second gas inlet pipe is arranged in the interlayer in a communicating manner; the tail end of the second gas inlet pipe is arranged outside the heat insulation layer.
Further, a conical material guiding section A and a conical material guiding section B are respectively arranged above and below the raw material containing tank; the diameter of the cross section of the upper part of the conical material guiding section A is larger than that of the cross section of the lower part; the diameter of the cross section of the upper part of the conical material guiding section B is smaller than that of the cross section of the lower part.
Further, a gas outlet pipe is arranged on the gas outlet; an air extracting pump is arranged at the pipe orifice of the air outlet pipe; the exhaust port of the air pump is connected with the waste gas treatment device.
Further, the waste gas treatment device sequentially comprises a dust filtering section, a spraying recovery section and a gas drying section; the outlet of the gas drying section is connected with a first gas inlet pipe and a second gas inlet pipe.
Further, a gas heating device is arranged between the outlet of the gas drying section and the first gas inlet pipe and between the outlet of the gas drying section and the second gas inlet pipe; the gas heating device comprises a spiral annular pipe and an electric heating net, and the electric heating net 31 is wrapped and arranged outside the spiral annular pipe.
The application method of the continuous production device comprises the following steps:
step 1), firstly, a second gas inlet pipe is opened, high-temperature gas is introduced into the interlayer for preheating, and the temperature of the high-temperature gas is 100-390 ℃;
after the step 2) is preheated, raw material fragments enter a raw material containing tank from a feed port through a star discharger, a stirring motor is started, and along with rotation of a stirring shaft, the stirring belt stirs the raw material fragments in the raw material containing tank;
step 3), a first gas inlet pipe is opened, the first gas inlet pipe is used for introducing hot gas flow into the stirring shaft, and the hot gas flow is sprayed into the raw material containing tank through air holes on the stirring shaft; the raw material fragments in the raw material holding tank are rolled and stirred under the dual actions of hot gas flow and stirring belt;
step 4) while stirring, the impurities volatilize and are dispersed in the air flow; along with the gradual increase of the pressure in the raw material holding tank, the air flow is discharged from the air outlet along the air outlet pipe, and the discharged air contains impurity gas;
step 5), the impurity gas is treated by a dust filtering section, a spraying recovery section and a gas drying section respectively to obtain pure air flow, and the pure air flow enters a raw material holding tank and an interlayer again after being heated by a gas heating device;
step 6) repeatedly and circularly carried out for a plurality of times until the impurity gas in the raw materials is basically removed;
step 7) collecting the raw material coming out of the discharge channel.
The high-temperature gas is one or a combination of more of air, nitrogen and inert gas.
Compared with the prior art, the invention has at least the following beneficial effects:
1) According to the invention, volatile impurities in the spice are removed in a gas exchange mode, so that the cost is low, the impurity removal effect is good, and the production cost is saved;
2) The waste gas of the invention can be recycled, is environment-friendly and energy-saving, and saves cost.
3) The invention avoids adding solvent, but reduces the loss of raw materials by introducing gas;
according to the invention, the high-temperature gas is introduced into the raw material holding tank, impurities in the raw material are volatilized into gas in the stirring process, and then the impurities are carried out through gas circulation, so that the properties of the raw material are not damaged in the whole impurity removal process, the raw material loss is avoided, the gas can be recycled, and the production cost is saved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: a raw material holding tank 1; a feed inlet 2; a discharge port 3; a gas inlet 4; a gas outlet 5; a cover 6; a stirring motor 7; a connecting flange 8; a stirring shaft 9; an air hole 10; a stirring belt 11; a bottom cover 12; a taper sleeve 13; a first gas inlet pipe 14; a heat insulating layer 15; stirring blades 16; a feeding channel 17; a discharge channel 18; star discharger 19; an interlayer 20; a conical material guiding section A21; a conical material guiding section B22; a gas outlet pipe 23; an air pump 24; an exhaust gas treatment device 25; a dust filtration section 26; a spray recovery section 27; a gas drying section 28; a gas heating device 29; a spiral ring pipe 30; an electric heating net 31; a first gas inlet pipe 32.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in the figure:
example 1:
a continuous production device for removing impurities of a fragrant raw material by using gas comprises a raw material holding tank 1, a feeding port 2, a discharging port 3, a gas inlet 4 and a gas outlet 5; a sealing cover 6 is arranged at the top of the raw material holding tank 1; the center of the top of the sealing cover 6 is provided with a stirring motor 7; the bottom of the stirring motor 7 is connected with a stirring shaft 9 through a connecting flange 8; the stirring shaft 9 is arranged in the raw material containing tank 1 and is of a hollow structure; the stirring shaft 9 is provided with a plurality of air holes 10; a stirring belt 11 is arranged on the outer wall of the stirring shaft 9 in a surrounding manner; a bottom cover 12 is arranged at the bottom of the raw material holding tank 1; the center of the bottom cover 12 is provided with a gas inlet 4; the center of the inner part of the bottom cover is fixedly provided with a taper sleeve 13; the taper sleeve 13 is fixedly arranged at the periphery of the gas inlet 4; the bottom of the stirring shaft 9 is sleeved outside the taper sleeve; the bottom of the gas inlet 4 is connected with a first gas inlet pipe 14; the outer wall of the raw material holding tank 1 is provided with an insulating layer 15; the sealing cover 6 is provided with a feeding port 2 and a gas outlet 5; the material inlet 2 and the gas outlet 5 are arranged at two sides of the stirring motor 7; the bottom cover 12 is provided with a discharge port 3.
Example 2:
on the basis of the embodiment 1, the bottom of the stirring shaft 9 of the stirring shaft is provided with stirring blades 16; the bottom of the stirring blade 16 is parallel to the inner plane of the bottom cover 12.
Example 3:
on the basis of the embodiment 1-2, a feeding channel 17 and a discharging channel 18 are arranged on the feeding port 2 and the discharging port 3; the tail ends of the feeding channel 17 and the discharging channel 18 are provided with star-shaped discharger 19.
Example 4:
on the basis of the embodiments 1-3, an interlayer 20 is arranged between the heat preservation layer 15 and the outer wall of the raw material holding tank 1, and a first gas inlet pipe 14 is arranged in the interlayer 20; the end of the first gas inlet pipe 14 is arranged outside the heat insulation layer 15.
Example 5:
on the basis of the embodiments 1-4, a conical material guiding section A21 and a conical material guiding section B22 are respectively arranged above and below the raw material holding tank 1. The method comprises the steps of carrying out a first treatment on the surface of the The diameter of the cross section of the upper part of the conical material guiding section A21 is larger than that of the cross section of the lower part; the diameter of the cross section of the upper part of the conical material guiding section B22 is smaller than that of the cross section of the lower part.
Example 6:
on the basis of the embodiments 1-5, a gas outlet pipe 23 is arranged on the gas outlet 5; an air extracting pump 24 is arranged at the pipe orifice of the air outlet pipe 23; the exhaust port of the air pump 24 is connected to an exhaust gas treatment device 25.
Example 7:
on the basis of examples 1 to 6, the exhaust gas treatment device 25 comprises a dust filtering section 26, a spray recovery section 27 and a gas drying section 28 in this order; the outlet of the gas drying section 28 is connected to a first gas inlet pipe 14 and a second gas inlet pipe 32.
Example 8:
on the basis of the embodiments 1-7, a gas heating device 29 is arranged between the outlet of the gas drying section 28 and the first gas inlet pipe 14 and the second gas inlet pipe 32; the gas heating device 29 comprises a spiral annular pipe 30 and an electric heating net 31, and the electric heating net 31 is wrapped and arranged outside the spiral annular pipe 30.
The operation flow of the using method of the invention is as follows: firstly, a second gas inlet pipe 32 is opened, high-temperature gas is introduced into an interlayer 20 for preheating, after preheating, raw material fragments enter a raw material containing tank 1 from a feed port 2 through a star discharger 19, a stirring motor 7 is started, and along with rotation of a stirring shaft 9, a stirring belt 11 stirs the raw material fragments in the raw material containing tank 1; then, a first gas inlet pipe 14 is opened, the first gas inlet pipe 14 is used for introducing hot gas flow into the stirring shaft 9, and the hot gas flow is sprayed into the raw material containing tank 1 through the air holes 10 on the stirring shaft 9; the raw material fragments in the raw material holding tank 1 are rolled and stirred under the dual actions of hot gas flow and the stirring belt 11; while stirring, the impurities volatilize and are dispersed in the air flow; as the pressure in the raw material holding tank 1 increases gradually, the air flow is discharged from the air outlet 5 along the air outlet pipe 23, and the discharged air contains impurity gas; the impurity gas is treated by a dust filtering section 26, a spraying recovery section 27 and a gas drying section 28 respectively to obtain pure gas flow, and the pure gas flow enters the raw material holding tank 1 and the interlayer 20 again after being heated by a gas heating device 29; the cycle is repeated for a plurality of times until the impurity gas in the raw material is basically removed.
According to the invention, the high-temperature gas is introduced into the raw material holding tank, impurities in the raw material are volatilized into gas in the stirring process, and then the impurities are carried out through gas circulation, so that the properties of the raw material are not damaged in the whole impurity removal process, the raw material loss is avoided, the gas can be recycled, and the production cost is saved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The continuous production device for removing the impurities of the fragrant raw materials by using the gas is characterized by comprising a raw material containing tank (1), a feeding port (2), a discharging port (3), a gas inlet (4) and a gas outlet (5); a sealing cover (6) is arranged at the top of the raw material containing tank (1); a stirring motor (7) is arranged in the center of the top of the sealing cover (6); the bottom of the stirring motor (7) is connected with the stirring shaft (9) through a connecting flange (8); the stirring shaft (9) is arranged in the raw material containing tank (1) and is of a hollow structure; a plurality of air holes (10) are arranged on the stirring shaft (9); a stirring belt (11) is arranged on the outer wall of the stirring shaft (9) in a surrounding way; a bottom cover (12) is arranged at the bottom of the raw material holding tank (1); the center of the bottom cover (12) is provided with a gas inlet (4); a taper sleeve (13) is fixedly arranged in the center of the inner part of the bottom cover; the taper sleeve (13) is fixedly arranged at the peripheral edge of the gas inlet (4); the bottom of the stirring shaft (9) is sleeved outside the taper sleeve; the bottom of the gas inlet (4) is connected with a first gas inlet pipe (14); an insulating layer (15) is arranged on the outer wall of the raw material holding tank (1); a material inlet (2) and a gas outlet (5) are arranged on the sealing cover (6); the material inlet (2) and the gas outlet (5) are arranged at two sides of the stirring motor (7); a discharge hole (3) is arranged on the bottom cover (12);
a gas outlet pipe (23) is arranged on the gas outlet (5); an air extracting pump (24) is arranged at the pipe orifice of the air outlet pipe (23); an exhaust port of the air pump (24) is connected with an exhaust gas treatment device (25);
the waste gas treatment device (25) comprises a dust filtering section (26), a spraying recovery section (27) and a gas drying section (28) in sequence; the outlet of the gas drying section (28) is connected with a first gas inlet pipe (14) and a second gas inlet pipe (32);
a gas heating device (29) is arranged between the outlet of the gas drying section (28) and the first gas inlet pipe (14) and the second gas inlet pipe (32); the gas heating device (29) comprises a spiral annular pipe (30) and an electric heating net (31), and the electric heating net (31) is wrapped and arranged outside the spiral annular pipe (30).
2. A continuous production apparatus for removing impurities from a raw material with a gas according to claim 1, wherein the stirring shaft (9) is provided with stirring blades (16) at the bottom thereof; the bottom of the stirring blade (16) is parallel to the inner plane of the bottom cover (12), and the end part of the stirring blade (16) is matched with the inner wall of the raw material holding tank (1) in an adapting way.
3. A continuous production device for removing impurities from a fragrance raw material by using gas according to claim 1, wherein the feeding port (2) and the discharging port (3) are provided with a feeding channel (17) and a discharging channel (18); the tail ends of the feeding channel (17) and the discharging channel (18) are provided with star-shaped discharger (19).
4. The continuous production device for removing impurities from a fragrance raw material by using gas according to claim 1, wherein an interlayer (20) is arranged between the heat insulation layer (15) and the outer wall of the raw material holding tank (1), and a second gas inlet pipe (32) is arranged in the interlayer (20) in a communicated manner; the tail end of the second gas inlet pipe (32) is arranged outside the heat insulation layer (15).
5. A continuous production apparatus for removing impurities from a raw material with a gas according to claim 1, wherein a conical material guiding section a (21) and a conical material guiding section B (22) are provided above and below the raw material holding tank (1), respectively; the diameter of the cross section of the upper part of the conical material guiding section A (21) is larger than that of the cross section of the lower part; the diameter of the cross section of the upper part of the conical material guiding section B (22) is smaller than that of the cross section of the lower part.
6. A method of using the continuous production apparatus of claim 1, comprising the steps of:
step 1), firstly, a second gas inlet pipe (32) is opened, high-temperature gas is introduced into the interlayer (20) for preheating, and the temperature of the high-temperature gas is 100-390 ℃;
after the step 2) is preheated, raw material powder enters the raw material containing tank (1) from a feed port (2) through a star discharger (19), a stirring motor (7) is started, and along with the rotation of a stirring shaft (9), a stirring belt (11) stirs the powder raw material in the raw material containing tank (1);
step 3), a first gas inlet pipe (14) is opened, the first gas inlet pipe (14) is used for introducing hot gas flow into the stirring shaft (9), and the hot gas flow is sprayed into the raw material containing tank (1) through an air hole (10) on the stirring shaft (9); the powder in the raw material holding tank (1) is stirred in a rolling way under the double actions of hot gas flow and a stirring belt (11);
step 4) while stirring, the impurities volatilize and are dispersed in the air flow; along with the gradual increase of the pressure in the raw material holding tank (1), the airflow is discharged from the gas outlet (5) along the gas outlet pipe (23), and the discharged gas contains impurity gas;
step 5), impurity gas is treated through a dust filtering section (26), a spraying recovery section (27) and a gas drying section (28) respectively to obtain pure air flow, and the pure air flow enters a raw material containing tank (1) and an interlayer (20) again after being heated by a gas heating device (29);
step 6) repeatedly and circularly carried out for a plurality of times until the impurity gas in the raw materials is basically removed;
step 7) collecting the raw material coming out of the discharge channel (18).
7. The method of claim 6, wherein the high temperature gas is one or a combination of air, nitrogen and inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442978.9A CN111454776B (en) | 2020-05-22 | 2020-05-22 | Continuous production device for removing impurities of perfume raw materials by using gas and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442978.9A CN111454776B (en) | 2020-05-22 | 2020-05-22 | Continuous production device for removing impurities of perfume raw materials by using gas and application method thereof |
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| Publication Number | Publication Date |
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| CN111454776A CN111454776A (en) | 2020-07-28 |
| CN111454776B true CN111454776B (en) | 2023-09-01 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9418024U1 (en) * | 1994-11-10 | 1994-12-22 | Umwelt Technics Nord Gmbh | Device for separating volatile components from a base material |
| JP2002143834A (en) * | 2000-11-10 | 2002-05-21 | Hisao Kojima | Device for removing impurity in liquid |
| CN104689748A (en) * | 2015-02-12 | 2015-06-10 | 浙江东立绿源科技股份有限公司 | Stirrer for feed production |
| CN205164160U (en) * | 2015-10-28 | 2016-04-20 | 昆明华电消防材料工程有限公司 | Fire retardant peculiar smell remove device |
| CN106732230A (en) * | 2016-12-09 | 2017-05-31 | 梅新星 | A kind of chemical mixing unit with knot screen |
| CN209997413U (en) * | 2019-06-04 | 2020-01-31 | 梁樱妮 | volatile organic compounds processing device |
| CN212293481U (en) * | 2020-05-22 | 2021-01-05 | 云南养瑞科技集团有限公司 | Continuous production device for removing impurities in fragrant raw materials by using gas |
-
2020
- 2020-05-22 CN CN202010442978.9A patent/CN111454776B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9418024U1 (en) * | 1994-11-10 | 1994-12-22 | Umwelt Technics Nord Gmbh | Device for separating volatile components from a base material |
| JP2002143834A (en) * | 2000-11-10 | 2002-05-21 | Hisao Kojima | Device for removing impurity in liquid |
| CN104689748A (en) * | 2015-02-12 | 2015-06-10 | 浙江东立绿源科技股份有限公司 | Stirrer for feed production |
| CN205164160U (en) * | 2015-10-28 | 2016-04-20 | 昆明华电消防材料工程有限公司 | Fire retardant peculiar smell remove device |
| CN106732230A (en) * | 2016-12-09 | 2017-05-31 | 梅新星 | A kind of chemical mixing unit with knot screen |
| CN209997413U (en) * | 2019-06-04 | 2020-01-31 | 梁樱妮 | volatile organic compounds processing device |
| CN212293481U (en) * | 2020-05-22 | 2021-01-05 | 云南养瑞科技集团有限公司 | Continuous production device for removing impurities in fragrant raw materials by using gas |
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| CN111454776A (en) | 2020-07-28 |
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