CN109442916A - A kind of 2- chlorine apellagrin wet product drying process and its drying equipment - Google Patents
A kind of 2- chlorine apellagrin wet product drying process and its drying equipment Download PDFInfo
- Publication number
- CN109442916A CN109442916A CN201811254540.7A CN201811254540A CN109442916A CN 109442916 A CN109442916 A CN 109442916A CN 201811254540 A CN201811254540 A CN 201811254540A CN 109442916 A CN109442916 A CN 109442916A
- Authority
- CN
- China
- Prior art keywords
- drying
- cylinder
- equipment
- chlorine apellagrin
- bipyramid
- Prior art date
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/16—Chambers, containers, receptacles of simple construction mainly closed, e.g. drum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
Abstract
The invention proposes a kind of 2- chlorine apellagrin wet product drying process and its drying equipments, drying process includes temperature programming and decompression operation, and drying process is accelerated by tumble dried equipment, drying equipment includes: bipyramid drying cylinder, rack, driving motor, jet chimney, vacuum pipe, steam generator and vacuum pump, the bipyramid drying cylinder includes simplified and chuck layer, the two sides of bipyramid drying cylinder may be rotatably mounted in rack, wherein the chuck layer of side is interconnected by jet chimney and steam generator, other side inner barrel is interconnected by vacuum pipe and vacuum pump, the inside of rack is fixedly installed with driving motor, driving motor is sequentially connected by belt pulley bipyramid drying cylinder, the present invention can be improved the drying rate of 2- chlorine apellagrin, drying operation is more flexible, reduce cost of labor, it is set simultaneously convenient for enterprise Standby transformation, reduces equipment investment, is with a wide range of applications.
Description
Technical field
The present invention relates to chemical intermediate production technology more particularly to a kind of 2- chlorine apellagrin wet product drying process and its dryings
Equipment.
Background technique
2- chlorine apellagrin is important fine-chemical intermediate, in a variety of drugs, insecticide, fungicide and herbicide
Mesosome raw material, because it has a vast market foreground before this.
However it is limited by the deficiency of preparation process, the production capacity of 2- chlorine apellagrin is not high, and the production cycle is partially long, synthesizes 2- at present
The technique of villaumite acid is usually to use the chloro- nicotinonitrile Hydrolyze method of 2-, passes through the chloro- nicotinonitrile of 2- water under alkaline condition
Solution, then pH is adjusted, cooling crystallization, and 2- chlorine apellagrin wet product is obtained by solid-liquid separation means, 2- is obtained after drying wet product
Chlorine apellagrin finished product.Currently used stoving process is to dry regular time under higher drying temperature, due to 2- chlorine apellagrin
The solvent of wet product is water, and during temperature is dissolved easily in water compared with Gao Shiqi, therefore conventional stoving process easily leads to its drying knot
Block or drying course generate material loss, and secondly 2- chlorine apellagrin drying at present spends the time longer, and flexible operation degree is not high,
To improving, enterprises production efficiency is unfavorable.
Summary of the invention
In view of this, the invention proposes a kind of 2- chlorine apellagrin wet product drying process high-efficient, flexible operation degree is high and
Its drying equipment.
The technical scheme of the present invention is realized as follows: the present invention provides a kind of 2- chlorine apellagrin wet product drying process, packet
Include following steps:
2- chlorine apellagrin wet product is put into drying equipment, controls in equipment temperature at 30 ± 10 DEG C, pressure is 20 ±
10Kpa, when drying to humidity is less than 40%RH, temperature is at 50 ± 10 DEG C in control equipment, and pressure is 20 ± 10Kpa, and drying is extremely
When humidity is less than 30%RH, temperature is at 70 ± 10 DEG C in control equipment, and pressure is 20 ± 10Kpa, and drying is to humidity less than 20%
When RH, stops heating and vacuumize, obtain 2- chlorine apellagrin dry product.
On the basis of above technical scheme, it is preferred that the drying equipment includes: bipyramid drying cylinder, rack, driving electricity
Machine, jet chimney, vacuum pipe, steam generator and vacuum pump, the bipyramid drying cylinder include cylinder and chuck layer, and bipyramid is dry
The two sides of dry cylinder may be rotatably mounted in rack, and wherein the chuck layer of side is mutually interconnected by jet chimney with steam generator
Logical, other side inner barrel is interconnected by vacuum pipe and vacuum pump, and the inside of rack is fixedly installed with driving motor, is driven
Dynamic motor is sequentially connected by belt pulley bipyramid drying cylinder.
On the basis of above technical scheme, it is preferred that further include Temperature Humidity Sensor, pressure sensor, the first automatic control
Regulating valve, the second automatic control adjustable valve and PLC controller, the inner barrel are equipped with Temperature Humidity Sensor and pressure sensor,
First automatic control adjustable valve is installed on the jet chimney, the second automatic control adjustable valve, the temperature and humidity are installed on vacuum pipe
Sensor, pressure sensor, the first automatic control adjustable valve and the second automatic control adjustable valve are electrically connected with PLC controller.
On the basis of above technical scheme, it is preferred that the motor and PLC controller are electrically connected.
Still more preferably, the drying process further include: in control equipment temperature at 30 ± 10 DEG C, pressure is 20 ±
10Kpa rotates 3 weeks/min of bipyramid drying cylinder；It is dry when being less than 40%RH to humidity, control in equipment temperature at 50 ± 10 DEG C,
Pressure is 20 ± 10Kpa, rotates 2 weeks/min of bipyramid drying cylinder；When drying to humidity is less than 30%RH, controls temperature in equipment and exist
70 ± 10 DEG C, pressure is 20 ± 10Kpa, rotates 1 week/min of bipyramid drying cylinder；When drying to humidity is less than 20%RH, stop adding
Heat and vacuumize, obtain 2- chlorine apellagrin dry product.
On the basis of above technical scheme, it is preferred that further include vacuum filter, the vacuum pipe passes through vacuum mistake
It is interconnected on the inside of filter and cylinder.
On the basis of above technical scheme, it is preferred that when Temperature Humidity Sensor detects that the temperature of inner barrel exceeds
When the temperature range of drying process, PLC controller meeting signal an alert simultaneously controls the closing of the first automatic control adjustable valve, when pressure passes
When sensor detects that the pressure value of simplified inside exceeds the pressure limit of drying process, PLC controller can signal an alert.
2- chlorine apellagrin wet product drying process of the invention and its drying equipment have below compared with the existing technology beneficial to effect
Fruit:
The present invention uses the drying process of step-up temperature, avoid once heating up it is excessively high cause 2- chlorine apellagrin soluble in water, shape
It agglomerates at drying, secondly step-up temperature process is controlled by PLC controller, and manpower can be liberated, manual operation error is avoided,
Each stage soaking time is determined by the humidity in bipyramid drying cylinder, can enter next stage, Ke Yi great when reaching dry requirement
Amplitude reduces unnecessary drying operation, for conventional single temperature lower set time drying, drying process of the invention
It is more flexible；
Drying equipment of the present invention is currently used equipment, the equipment for advantageously reducing enterprise's process modification
Investment, application is simpler, without extra equipment operation training, is with a wide range of applications.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of drying equipment of the invention.
In figure: 1- bipyramid drying cylinder, 2- rack, 3- driving motor, 4- jet chimney, 5- vacuum pipe, 6- steam generation
Device, 7- vacuum pump, 8- Temperature Humidity Sensor, 9- pressure sensor, the first automatic control adjustable valve of 10-, 11- cylinder, 12- chuck layer,
The second automatic control adjustable valve of 13-, 14-PLC controller, 15- vacuum filter.
Specific embodiment
Below in conjunction with embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clearly and completely
Description, it is clear that described embodiment is only some embodiments of the invention, rather than whole embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
2- chlorine apellagrin wet product drying process of the invention comprising: 2- chlorine apellagrin wet product is put into drying equipment, control
For temperature at 30 ± 10 DEG C, pressure is 20 ± 10Kpa in equipment, when drying to humidity is less than 40%RH, controls temperature in equipment and exists
50 ± 10 DEG C, pressure is 20 ± 10Kpa, dry when being less than 30%RH to humidity, controls in equipment temperature at 70 ± 10 DEG C, pressure
For 20 ± 10Kpa, when drying to humidity is less than 20%RH, stops heating and vacuumize, obtain 2- chlorine apellagrin dry product.
Since 2- chlorine apellagrin is slightly soluble in water in the event of high temperatures, step-up temperature is used, it is lower in temperature
In the case of first remove partial moisture in 2- chlorine apellagrin, it is possible to prevente effectively from the dissolution of 2- chlorine apellagrin leads to object in the case of high temperature drying
Material agglomeration and partial material are lost.
As described in Figure 1, drying equipment of the invention include: bipyramid drying cylinder 1, rack 2, driving motor 3, jet chimney 4,
Vacuum pipe 5, steam generator 6 and vacuum pump 7, the bipyramid drying cylinder 1 include cylinder 11 and chuck layer 12, bipyramid drying cylinder
1 two sides may be rotatably mounted in rack 2, and wherein the chuck layer 12 of side is interconnected by jet chimney 4 and 6 phase of steam generator
It is logical, it is interconnected inside other side cylinder 11 by vacuum pipe 5 and vacuum pump 7, the inside of rack 2 is fixedly installed with driving electricity
Machine 3, driving motor 3 are sequentially connected by belt pulley bipyramid drying cylinder 1.
In a specific embodiment, further include Temperature Humidity Sensor 8, pressure sensor 9, the first automatic control adjustable valve 10,
Second automatic control adjustable valve 13 and PLC controller 14 are equipped with Temperature Humidity Sensor 8 and pressure sensor 9 inside the cylinder 11,
First automatic control adjustable valve 10 is installed on the jet chimney 4, the second automatic control adjustable valve 13 is installed on vacuum pipe 5, it is described
Temperature Humidity Sensor 8, pressure sensor 9, the first automatic control adjustable valve 10 and the second automatic control adjustable valve 13 are electric with PLC controller 14
Property connection.
In a specific embodiment, the motor and PLC controller 14 are electrically connected.
The drying situation inside bipyramid drying cylinder 1 is obtained by Temperature Humidity Sensor 8 and pressure sensor 9, sensor will
Temperature and humidity and pressure information pass to PLC controller 14, PLC controller 14 by pre-set programs to the sensor information of input into
Row judgement handles and exports corresponding output information to the first automatic control adjustable valve 10, the second automatic control adjustable valve 13 and driving motor 3,
First automatic control adjustable valve 10, the second automatic control adjustable valve 13 adjust the opening and closing degree of jet chimney 4 and vacuum pipe 5 respectively, thus
Achieve the effect that control heating and vacuum degree, the revolving speed by controlling driving motor 3 reaches the rotation speed of control bipyramid drying cylinder 1
Degree.
In a specific embodiment, the drying process further include: temperature is in 30 ± 10 DEG C, pressure in control equipment
20 ± 10Kpa, the revolving speed of control bipyramid drying cylinder 1 are 3 weeks/min；When drying to humidity is less than 40%RH, temperature in equipment is controlled
For degree at 50 ± 10 DEG C, pressure is 20 ± 10Kpa, and the revolving speed of control bipyramid drying cylinder 1 is 2 weeks/min；Drying to humidity is less than
When 30%RH, temperature is controlled in equipment at 70 ± 10 DEG C, pressure is 20 ± 10Kpa, the revolving speed of control bipyramid drying cylinder 1 is 1 week/
min；When drying to humidity is less than 20%RH, stops heating and vacuumize, obtain 2- chlorine apellagrin dry product.
In a specific embodiment, further include vacuum filter 15, the vacuum pipe 5 by vacuum filter 15 with
It is interconnected on the inside of cylinder 11.
Since the material in bipyramid drying cylinder 1 is solid powder, need vacuum pipe 5 to be installed very during vacuumizing
Air filter 15, avoids material from being taken away by vacuum, influences yield.
Specific working mode of the invention is as follows:
Operator presets drying process by PLC controller 14, and 2- chlorine apellagrin wet product is put into bipyramid drying cylinder 1
It is interior, start drying, PLC controller 14 controls the first Self controlling valve and the second Self controlling valve is opened, the steaming that steam generator 6 generates
Vapour is entered by jet chimney 4 in the chuck layer 12 of bipyramid drying cylinder 1, is heated to cylinder 11, when Temperature Humidity Sensor 8 is examined
Testing temperature information is simultaneously sent to PLC controller 14, and when temperature reaches requirement, PLC controller 14 sends a signal to the first internally piloted valve
Door, the first Self controlling valve reduce aperture, and vacuum pump 7 is by vacuum pipe 5 to carrying out vacuum pumping, pressure sensing in cylinder 11
Device 9 detects pressure information and is sent to PLC controller 14, and when pressure reaches requirement, PLC controller 14 sends a signal to second
Self controlling valve, the second Self controlling valve reduce aperture.
Driving motor 3 rotates and bipyramid drying cylinder 1 is driven to be overturn, and controls driving motor 3 by PLC controller 14
Revolving speed, bipyramid drying cylinder 1 overturn the movement for being conducive to material in drying cylinder, avoid drying uneven, are conducive to accelerate dry speed
Rate.
Temperature Humidity Sensor 8 also detects the humidity in cylinder 11, and under the conditions of certain temperature, humidity is lower than preset value
When, PLC controller 14 sends a signal to the first Self controlling valve, the second Self controlling valve and driving motor 3 again, controls steam respectively
The aperture of pipeline 4 and vacuum pipe 5, and the revolving speed of driving motor 3 is reduced, so that drying be made to enter next stage.
When being in the last one drying stage, humidity sensor detects the humidity in cylinder 11 lower than preset value, PLC
Controller 14 controls the first automatic control adjustable valve 10 and the second automatic control adjustable valve 13 is closed, and resets to cylinder 11 and closes driving motor 3,
Vacuum breaker can discharge after standing.
In a specific embodiment, when the first stage, temperature and pressure reached requirement, humidity has reached requirement then
Second stage is directly entered to be dried, and so on.
For dry compared to the conventional single temperature set time, drying process of the invention is more flexible, more energy saving,
Just stop drying process when material, which reaches dry, to be required, avoids unnecessary drying process, shorten drying process, simultaneously
The stage drying mode of the present invention is milder, avoids dramatic temperature from changing bring material cosmetic variation, or cause material
It is lost.
The foregoing is merely better embodiments of the invention, are not intended to limit the invention, all of the invention
Within spirit and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of 2- chlorine apellagrin wet product drying process, which is characterized in that the drying process includes the following steps:
2- chlorine apellagrin wet product is put into drying equipment, controlling temperature in equipment, at 30 ± 10 DEG C, pressure is 20 ± 10Kpa, is done
Dry controlling temperature in equipment, at 50 ± 10 DEG C, pressure is 20 ± 10Kpa when being less than 40%RH to humidity, dry to be less than to humidity
When 30%RH, controlling temperature in equipment, at 70 ± 10 DEG C, pressure is 20 ± 10Kpa, when drying to humidity is less than 20%RH, is stopped
It heats and vacuumizes, obtain 2- chlorine apellagrin dry product.
2. a kind of 2- chlorine apellagrin wet product drying process as described in claim 1, which is characterized in that the drying process includes such as
Lower step:
2- chlorine apellagrin wet product is put into drying equipment, controlling temperature in equipment, at 30 ± 10 DEG C, pressure is 20 ± 10Kpa, is turned
Dynamic (1) 3 week/min of bipyramid drying cylinder；When drying to humidity is less than 40%RH, temperature is in 50 ± 10 DEG C, pressure in control equipment
20 ± 10Kpa rotates (1) 2 week/min of bipyramid drying cylinder；When drying to humidity is less than 30%RH, temperature is 70 in control equipment
± 10 DEG C, pressure is 20 ± 10Kpa, rotates (1) 1 week/min of bipyramid drying cylinder；When drying to humidity is less than 20%RH, stop adding
Heat and vacuumize, obtain 2- chlorine apellagrin dry product.
3. a kind of 2- chlorine apellagrin wet product drying process as described in claim 1, which is characterized in that the drying equipment includes:
Bipyramid drying cylinder (1), rack (2), driving motor (3), jet chimney (4), vacuum pipe (5), steam generator (6) and vacuum
It pumps (7), the bipyramid drying cylinder (1) includes cylinder (11) and chuck layer (12), and the two sides of bipyramid drying cylinder (1) are rotatably mounted
On rack (2), wherein the chuck layer (12) of side is interconnected by jet chimney (4) and steam generator (6), the other side
It is interconnected inside cylinder (11) by vacuum pipe (5) and vacuum pump (7), the inside of rack (2) is fixedly installed with driving electricity
Machine (3), driving motor (3) are sequentially connected by belt pulley bipyramid drying cylinder (1).
4. a kind of 2- chlorine apellagrin wet product drying process as claimed in claim 3, which is characterized in that further include Temperature Humidity Sensor
(8), pressure sensor (9), the first automatic control adjustable valve (10), the second automatic control adjustable valve (13) and PLC controller (14), the cylinder
Temperature Humidity Sensor (8) and pressure sensor (9) are installed inside body (11), first is equipped on the jet chimney (4) certainly
Control regulation valve (10) is equipped with the second automatic control adjustable valve (13) on vacuum pipe (5), and the Temperature Humidity Sensor (8), pressure pass
Sensor (9), the first automatic control adjustable valve (10) and the second automatic control adjustable valve (13) are electrically connected with PLC controller (14).
5. a kind of 2- chlorine apellagrin wet product drying process as claimed in claim 4, which is characterized in that the driving motor (3) with
PLC controller 14 is electrically connected.
6. a kind of 2- chlorine apellagrin wet product drying process as claimed in claim 3, which is characterized in that further include vacuum filter
(15), the vacuum pipe (5) on the inside of vacuum filter (15) and cylinder (11) by being interconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811254540.7A CN109442916B (en) | 2018-10-25 | 2018-10-25 | 2-chloronicotinic acid wet product drying process and drying equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811254540.7A CN109442916B (en) | 2018-10-25 | 2018-10-25 | 2-chloronicotinic acid wet product drying process and drying equipment thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109442916A true CN109442916A (en) | 2019-03-08 |
| CN109442916B CN109442916B (en) | 2021-02-26 |
Family
ID=65548648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811254540.7A Active CN109442916B (en) | 2018-10-25 | 2018-10-25 | 2-chloronicotinic acid wet product drying process and drying equipment thereof |
Country Status (1)
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| CN (1) | CN109442916B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101117332A (en) * | 2006-08-04 | 2008-02-06 | 浙江医药股份有限公司新昌制药厂 | Preparation method of 2-chloronicotinic acid |
| CN101294767A (en) * | 2008-06-11 | 2008-10-29 | 河南豫光金铅股份有限公司 | Silver powder drying mechanism and method thereof |
| CN105115264A (en) * | 2015-07-20 | 2015-12-02 | 太仓市友联干燥粉碎设备有限公司 | Double-tapered rotary vacuum drier system |
| CN207888964U (en) * | 2017-12-29 | 2018-09-21 | 溧阳市乔森塑料有限公司 | A kind of vacuum desiccator and wet granulation after-treatment system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007130058A1 (en) * | 2006-05-09 | 2007-11-15 | Pcs Wood Technologies, Llc | Timber drying method and associated apparatus |
| CN106643048A (en) * | 2015-10-30 | 2017-05-10 | 南京物创建材有限公司 | Rotary vacuum dryer |
| CN206974058U (en) * | 2017-07-25 | 2018-02-06 | 邓雅心 | A kind of bipyramid rotary drying equipment |
| CN107606882B (en) * | 2017-08-22 | 2022-08-26 | 湖南省博世康中医药有限公司 | Traditional Chinese medicinal material drying device and low-temperature circulating drying method |
-
2018
- 2018-10-25 CN CN201811254540.7A patent/CN109442916B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117332A (en) * | 2006-08-04 | 2008-02-06 | 浙江医药股份有限公司新昌制药厂 | Preparation method of 2-chloronicotinic acid |
| CN101294767A (en) * | 2008-06-11 | 2008-10-29 | 河南豫光金铅股份有限公司 | Silver powder drying mechanism and method thereof |
| CN105115264A (en) * | 2015-07-20 | 2015-12-02 | 太仓市友联干燥粉碎设备有限公司 | Double-tapered rotary vacuum drier system |
| CN207888964U (en) * | 2017-12-29 | 2018-09-21 | 溧阳市乔森塑料有限公司 | A kind of vacuum desiccator and wet granulation after-treatment system |
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| CN109442916B (en) | 2021-02-26 |
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