CN112240682A - Spray freeze drying device for continuous production - Google Patents
Spray freeze drying device for continuous production Download PDFInfo
- Publication number
- CN112240682A CN112240682A CN202011101912.XA CN202011101912A CN112240682A CN 112240682 A CN112240682 A CN 112240682A CN 202011101912 A CN202011101912 A CN 202011101912A CN 112240682 A CN112240682 A CN 112240682A
- Authority
- CN
- China
- Prior art keywords
- drying
- chamber
- freezing
- drying chamber
- spray freeze
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- F26B5/06—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 the process involving freezing
- F26B5/065—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 the process involving freezing the product to be freeze-dried being sprayed, dispersed or pulverised
-
- 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
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/08—Granular materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention belongs to the field of spray freeze drying, and aims to solve the problem that the existing spray freeze drying device consumes long time. The device mainly comprises a freezing chamber, a drying chamber and a discharging device. The main characteristics are as follows: the freezing chamber, the drying chamber and the discharging device are directly connected, the precursor solution forms a plurality of small droplets through the nozzle, the droplets fall under the action of gravity, and in the falling process, the droplets are sequentially subjected to freezing and drying processes and then pass through the discharging device to be collected together. The device realizes the integration of the freezing process, the drying process and the discharging process, saves time, improves efficiency and simultaneously avoids pollution caused by manual operation.
Description
Technical Field
The invention relates to a spray freeze drying device, in particular to a novel spray freeze drying device for continuous production, and belongs to the field of spray freeze drying.
Background
The spray freeze drying technology is a new technology and mainly comprises three sub-processes: atomizing, freezing and drying. The prepared precursor solution is firstly atomized into very small droplets through a nozzle, and then is in contact heat exchange with a cooling medium (liquid nitrogen, low-temperature gas and the like), the small droplets are frozen in a short time due to the very high heat transfer rate in a low-temperature environment, and then the frozen droplets are dried in a vacuum environment to obtain a final product.
The medicine powder prepared by the spray freeze drying technology has the advantages of less agglomeration, uniform size, good biological activity and the like. Therefore, the spray freeze drying technology is widely applied to the field of medicine preparation. However, the mass production mode is generally adopted in the current production, which brings about two problems, on one hand, the whole process takes a long time because of the need of continuous feeding and material changing. On the other hand, human handling can negatively affect the sterility of the product. Therefore, the continuous production device is very important for improving the efficiency and the sterility of the process.
There are also some patents relating to spray freeze drying devices, such as the one proposed in patent US9945611B2, which have an agitator used to avoid agglomeration between particles. The apparatus is still batch-wise produced. An integrated spray freeze-drying apparatus and method is also reported in patent CN101441030A, but this method still does not completely realize continuous production, and the prepared product still needs to be taken out after the whole process is finished. And the introduced stirrer increases the energy consumption of the whole system.
It can be seen from the above-mentioned published documents that there is no report on a continuous production device for spray freeze drying at present, and the invention adopts a new idea to design a spray freeze drying device capable of continuous production, which can effectively improve the efficiency of the spray freeze drying process.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a spray freeze drying device which can realize continuous production in practice, improve the spray freeze drying efficiency and reduce the pollution caused by manual operation.
The technical scheme for solving the problems is as follows:
a continuously producing spray freeze-drying apparatus comprising: freezing chamber, drying chamber, discharging device. The freezing chamber, the drying chamber and the discharging device are directly connected, and liquid drops are sprayed out through the nozzles, then are respectively subjected to freezing and drying processes, and finally directly fall into the collecting device without other links.
The cold energy required by freezing the small liquid drops in the freezing chamber mainly has two sources, one is the radiation heat exchange between the small liquid drops and the wall surface, and the other is the heat exchange between the small liquid drops and liquid nitrogen.
The heat required by the droplets in the drying chamber is mainly from the radiant heat exchange of the walls.
By arranging two buffer chambers, particles fall into different buffer chambers at different times, so that the interference of the external environment on the internal vacuum degree of the device is reduced.
A condenser is provided on the wall surface of the freezing chamber, and a condenser is provided on the wall surface of the drying chamber. The wall temperature of the freezing chamber is reduced, and the wall temperature of the drying chamber is increased.
Drawings
FIG. 1 is a schematic view of an apparatus
In the figure: 1. the system comprises a precursor solution, 2 parts of a nozzle 1, 3 parts of a nozzle 2, 4 parts of a vacuum pump, 5 parts of an evaporator, 6 parts of a compressor, 7 parts of a drying chamber, 8 parts of a throttle valve, 9 parts of a condenser, 10 parts of a three-way valve, 11 parts of a valve 1, 12 parts of a buffer chamber 1, 13 parts of a valve 2, 14 parts of a material collector, 15 parts of a valve 3, 16 part of a buffer chamber 2, 17 parts of a valve 4, 18 parts of a delay dropping device, 19 parts of a throttle valve, 20 parts of a compressor, 21 parts of a nitrogen tank and 22 parts of a freezing chamber.
Detailed Description
The invention is further explained by the following combined with the drawings and the embodiment.
Referring to fig. 1, the precursor solution is atomized in the nozzle 3 into a number of droplets, which fall in the freezing chamber 22. Heat exchange with the wall surface occurs during the falling, while liquid nitrogen is ejected upward at the bottom of the freezing chamber 22 via the nozzle 2, contacting the liquid droplets, so that the temperature of the liquid droplets falls and freezes. The frozen droplets enter the drying chamber 7 and the frozen particles fall onto the delayed falling device 18 while exchanging heat with the wall surface. The ice crystals in the particles are removed by sublimation. The dried particles are passed to three valves 10, where the valve 11 is opened and the particles are passed to a buffer chamber 12, after a certain time interval the valve 11 is closed and the valve 13 is opened, so that the particles are passed from the buffer chamber 12 to a material collector 14, while the valve 17 is opened and the particles are passed to a buffer chamber 16 on the other side. After the buffer chamber 16 is filled, the valve 17 is closed and the valve 15 is opened, so that the material in the buffer chamber 16 enters the material collector 14, and the valve 11 is opened again. The above steps are repeated in a circulating way, and the influence of the external environment on the internal vacuum degree of the device is reduced through the switching of the two buffer chambers.
Referring to fig. 1, the working fluid flows through the evaporator 5 on the wall of the freezing chamber 22, and is evaporated and cooled, so that the temperature of the wall of the freezing chamber is reduced. Then the working medium flows through the compressor 6 and is condensed on the wall surface of the drying chamber 7, so that the temperature of the wall surface is increased.
Claims (6)
1. A spray freeze drying device that can be used to continuous production characterized by: the freezing chamber 3, the drying chamber 7 and the discharging device 14 are directly connected.
2. A freezing chamber as claimed in claim 1, wherein: liquid nitrogen is sprayed upwards from the bottom of the freezing chamber through the injection pump 21, the liquid nitrogen is vaporized and absorbs heat for refrigeration in the spraying process, meanwhile, the temperature of the wall surface is low, and radiation heat exchange exists between the liquid nitrogen and liquid drops, so that the liquid drops are frozen.
3. The drying chamber of claim 1, wherein: the frozen droplets fall down on the delay drying device 19, prolonging the drying time. Meanwhile, the temperature of the wall surface is high, and radiation heat exchange exists between the wall surface and the frozen particles, so that the particles are dried in a vacuum environment.
4. The time-lapse drying apparatus of claim 3, wherein: different metal plates are fixed on the same metal rod, and the residence time of the frozen particles in the drying chamber can be adjusted by setting the inclination angle of the metal plates.
5. The discharge device of claim 1, wherein: through controlling the valve, the frozen particles fall into different buffer chambers at different times, and the influence of the external environment on the internal vacuum degree of the device is reduced.
6. The freezing and drying chamber of claim 1, wherein: the same system is adopted for controlling the wall temperature of the two, the working medium is evaporated in the evaporator 5, so that the wall temperature of the drying chamber 3 is reduced, and then the working medium is condensed in the condenser 9 by the compressor 6 to release heat, so that the wall temperature of the drying chamber is increased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011101912.XA CN112240682A (en) | 2020-10-14 | 2020-10-14 | Spray freeze drying device for continuous production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011101912.XA CN112240682A (en) | 2020-10-14 | 2020-10-14 | Spray freeze drying device for continuous production |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112240682A true CN112240682A (en) | 2021-01-19 |
Family
ID=74169147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011101912.XA Pending CN112240682A (en) | 2020-10-14 | 2020-10-14 | Spray freeze drying device for continuous production |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112240682A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114923316A (en) * | 2022-05-17 | 2022-08-19 | 西安工业大学 | Industrialized dynamic spray freeze drying device and process flow thereof |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1357900A2 (en) * | 2001-01-30 | 2003-11-05 | Board of Regents, The University of Texas System | Process for production of nanoparticles and microparticles by spray freezing into liquid |
CN1682083A (en) * | 2002-04-23 | 2005-10-12 | 拜尔技术服务有限责任公司 | Freeze-drying apparatus |
EP1915987A1 (en) * | 2006-10-27 | 2008-04-30 | MediGene AG | Spray-freeze-drying process for the preparation of pellets comprising percolation drying |
CN101391152A (en) * | 2008-10-22 | 2009-03-25 | 天津大学 | Double-reboiler batch extraction rectification device and method using absorption heat pump |
US20110113644A1 (en) * | 2008-07-10 | 2011-05-19 | Ulvac, Inc. | Freeze-drying apparatus and freeze-drying method |
CN105091509A (en) * | 2015-08-31 | 2015-11-25 | 天津商业大学 | Vacuum drying device for heat pump |
CN205106276U (en) * | 2015-10-27 | 2016-03-30 | 天津东江食品有限公司 | Food vacuum freezing drying oven |
CN107009535A (en) * | 2017-05-21 | 2017-08-04 | 郑州睿科生化科技有限公司 | A kind of polysilicon cuts the retracting device of mortar |
CN107683398A (en) * | 2015-06-01 | 2018-02-09 | Ima生命北美股份有限公司 | The spray chilling and the freezing in bulk of stirring drying heated using charge carrying media is dried |
US10252181B2 (en) * | 2017-08-04 | 2019-04-09 | ZoomEssence, Inc. | Ultrahigh efficiency spray drying apparatus and process |
-
2020
- 2020-10-14 CN CN202011101912.XA patent/CN112240682A/en active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1357900A2 (en) * | 2001-01-30 | 2003-11-05 | Board of Regents, The University of Texas System | Process for production of nanoparticles and microparticles by spray freezing into liquid |
CN1682083A (en) * | 2002-04-23 | 2005-10-12 | 拜尔技术服务有限责任公司 | Freeze-drying apparatus |
EP1915987A1 (en) * | 2006-10-27 | 2008-04-30 | MediGene AG | Spray-freeze-drying process for the preparation of pellets comprising percolation drying |
US20110113644A1 (en) * | 2008-07-10 | 2011-05-19 | Ulvac, Inc. | Freeze-drying apparatus and freeze-drying method |
CN101391152A (en) * | 2008-10-22 | 2009-03-25 | 天津大学 | Double-reboiler batch extraction rectification device and method using absorption heat pump |
CN107683398A (en) * | 2015-06-01 | 2018-02-09 | Ima生命北美股份有限公司 | The spray chilling and the freezing in bulk of stirring drying heated using charge carrying media is dried |
CN105091509A (en) * | 2015-08-31 | 2015-11-25 | 天津商业大学 | Vacuum drying device for heat pump |
CN205106276U (en) * | 2015-10-27 | 2016-03-30 | 天津东江食品有限公司 | Food vacuum freezing drying oven |
CN107009535A (en) * | 2017-05-21 | 2017-08-04 | 郑州睿科生化科技有限公司 | A kind of polysilicon cuts the retracting device of mortar |
US10252181B2 (en) * | 2017-08-04 | 2019-04-09 | ZoomEssence, Inc. | Ultrahigh efficiency spray drying apparatus and process |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114923316A (en) * | 2022-05-17 | 2022-08-19 | 西安工业大学 | Industrialized dynamic spray freeze drying device and process flow thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105318666A (en) | Vacuum spray freeze-drying device and method | |
CN106268503B (en) | Liquid nitrogen spray freezing granulation vacuum drying device and working method | |
CN107683398A (en) | The spray chilling and the freezing in bulk of stirring drying heated using charge carrying media is dried | |
CN102987524B (en) | Pulse spouted microwave freeze-drying device for granular conditioning food and homogenization efficient processing method | |
CN110523096B (en) | Large-scale drying device and method capable of shortening probiotic feed liquid freeze-drying time | |
WO2017084164A1 (en) | Vacuum spray freeze granulation apparatus and method | |
CN112240682A (en) | Spray freeze drying device for continuous production | |
CN111298462A (en) | Inert particle spouted bed spray freeze-drying device and method | |
CN205228008U (en) | Vacuum spraying freeze drying equipment | |
CN214172702U (en) | Spray freeze drying system | |
CN219934432U (en) | Spray freeze drying structure | |
CN201569202U (en) | Curtain falling type refrigeration controlling device for chiller | |
CN107270767A (en) | Continuous jet of ice grains cleaning device based on vortex tube | |
CN109393006A (en) | A kind of swimming crab liquid nitrogen flash freezer equipment | |
CN102589221A (en) | Device and method using ultrasonic wave for preparing ice slurry | |
CN102759258A (en) | Energy-saving consumption-reduction system of vacuum freeze-drying machine | |
CN115046342B (en) | Ice slurry snow making machine and control method | |
CN104585840A (en) | Continuous vacuum quick freezing device and continuous vacuum quick freezing method for foods | |
CN202032803U (en) | Device for producing granular ice by freezing atomized water drops in cold-carrying airflow | |
CN209726591U (en) | A kind of microminiature evaporator of flake ice maker | |
CN204739850U (en) | Continuous type vacuum spraying freeze drying equipment | |
CN107166831A (en) | A kind of continuous ice pellets device for making | |
CN102128531A (en) | Method and device for preparing granular ice by freezing atomized water drops in cold carrying airflow | |
CN205658286U (en) | Cold water -chilling plant of fountain fruit vegetables | |
CN104544475B (en) | A kind of method and apparatus of intensity adjustable microwave radiation technology freezing musculus cutaneus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210119 |
|
WD01 | Invention patent application deemed withdrawn after publication |