CN115574548A - Centrifugal drying device for preparing immobilized enzyme - Google Patents
Centrifugal drying device for preparing immobilized enzyme Download PDFInfo
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- CN115574548A CN115574548A CN202211251816.2A CN202211251816A CN115574548A CN 115574548 A CN115574548 A CN 115574548A CN 202211251816 A CN202211251816 A CN 202211251816A CN 115574548 A CN115574548 A CN 115574548A
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- centrifugal drying
- hot air
- drying chamber
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- 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
- F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment
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- 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
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- General Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to the technical field of immobilized enzyme preparation, and particularly discloses a centrifugal drying device for preparing immobilized enzyme; the device comprises a centrifugal drying chamber, a cyclone separator, a storage tank, a hot air generator and a vacuum pump, wherein a hollow rotary drum is arranged in the centrifugal drying chamber, a flow guide spiral blade which is attached to the inner wall of the centrifugal drying chamber is arranged on the outer circumferential surface of the hollow rotary drum, a hollow rotary shaft which extends out of the centrifugal drying chamber downwards is fixedly connected to the top wall of the hollow rotary drum, an air suction opening is formed in the upper end of the hollow rotary shaft, a filter layer is arranged in the hollow rotary drum below the air suction opening, the lower end of the hollow rotary shaft is connected with the vacuum pump in a sealing and rotating mode, and the vacuum pump is connected with the vacuum pump; the centrifugal drying device reduces the hot air temperature required by the immobilized enzyme liquid during drying, avoids the problem of activity reduction of the immobilized enzyme caused by high-temperature hot air drying, increases the stroke of hot air spiral motion, improves the contact time of materials and hot air, and ensures the drying effect of the immobilized enzyme.
Description
Technical Field
The invention relates to the technical field of immobilized enzyme preparation, and particularly discloses a centrifugal drying device for preparing an immobilized enzyme.
Background
The immobilized enzyme is obtained by combining enzyme with water-insoluble macromolecular carrier or embedding enzyme therein by physical or chemical method, thereby improving the operation stability, storage stability, thermal stability, cyclic usability, etc. of enzyme. For example, in the process of enzymatically purifying phosphatidylserine, phospholipase D needs to be immobilized on mesoporous silica to improve various properties of phospholipase D, thereby achieving an improvement in the yield of synthesized phosphatidylserine. In the preparation process of the immobilized enzyme, the enzyme and the carrier are firstly dissolved in the buffer solution to be mixed, then the adsorption, the precipitation and the crosslinking are carried out, and finally the immobilized enzyme is obtained after the centrifugal drying.
At present, centrifugal drying machines are mostly adopted in centrifugal drying steps of immobilized enzymes, but the temperature of hot air introduced into the centrifugal drying machines in the operation process is generally higher than 160 ℃, and when the enzymes are heated to 160 ℃ for a period of time, the activity of the whole enzymes can be reduced and even inactivated, so that the activity of the finally prepared immobilized enzymes is poor. The utility model with the application number of CN2020212392692 discloses a vacuum centrifugal dryer, which comprises a tower body, an atomizer, a hot air distributor, a hot air generator, a material receiving device and an air exhaust device, wherein the lower part of the tower body is provided with an air outlet and a powder outlet; the lower end of the atomizer is uniformly provided with nozzles in the circumferential direction; the hot air distributor is in a volute shape, is fixed at the upper end of the tower body and is communicated with the vacant space; the hot air generator is provided with an air inlet and an air outlet, and the air outlet is communicated with the hot air distributor; the material receiving device is communicated with the powder outlet; the air exhaust device is communicated with the accommodating space; the air discharge amount of the air discharge device is larger than the air inlet amount of the hot air generator. This vacuum centrifugal drier can reduce the evaporating temperature of centrifugal solution through the setting of the inside negative pressure of tower body, be applicable to like the thermal sensitivity material centrifugal drying of enzyme, but this vacuum centrifugal drier is at the in-service use in-process, because the hot-blast income and the air exit of top, the effect process of bleeding of meal outlet, make the hot-blast spiral motion that can't be inside the tower body of sending into, lead to the contact time of hot-blast and atomizing material to shorten, in addition the hot-blast temperature of sending into is lower, can't realize the effective drying in the immobilized enzyme preparation process, consequently, need increase the height of whole tower body and prolong the contact time of hot-blast and atomizing material in the tower body, lead to whole centrifugal drier to amass, and drying effect is not ideal. In view of the defects of the existing vacuum centrifugal drying machine in the drying process of thermosensitive materials such as immobilized enzymes, the application provides a centrifugal drying device for the centrifugal drying process in the immobilized enzyme preparation process.
Disclosure of Invention
The invention aims to provide a centrifugal drying device to solve the problems that when the conventional vacuum centrifugal dryer is used for drying heat-sensitive materials such as immobilized enzymes, the enzyme activity is easy to reduce due to overhigh temperature of hot air, the fed hot air cannot move spirally in the vacuum centrifugal dryer, the contact time of the hot air to atomized materials is too short, the drying is incomplete and the like.
The invention is realized by the following technical scheme:
the utility model provides a centrifugal drying device for preparing immobilized enzyme, includes centrifugal drying chamber, cyclone, holding vessel, hot-blast generater and evacuation pump, centrifugal drying chamber's upper end is provided with hot-blast distributor and atomizer, hot-blast distributor is connected through hot-blast pipeline with hot-blast generater, the holding vessel is connected through the transfer line with atomizer, and is provided with the conveying pump on the transfer line, be connected with the conveyer pipe between centrifugal drying chamber's lower extreme and the cyclone, set up upper end seal, lower extreme open-ended cavity rotary drum in the centrifugal drying chamber, the outer disc of cavity rotary drum is provided with the water conservancy diversion helical blade of laminating with centrifugal drying chamber inner wall, the roof of cavity rotary drum links firmly the cavity pivot that stretches out centrifugal drying chamber downwards, the extraction opening has been seted up to the upper end of cavity pivot, is located be provided with the filter layer in the cavity rotary drum of extraction opening below, the lower extreme seal of cavity pivot rotates and is connected with evacuation pipe, evacuation pipe is connected with evacuation pump.
Before centrifugal drying is carried out on the immobilized enzyme liquid, the centrifugal drying device firstly maintains the interior of the centrifugal drying chamber in a negative pressure state all the time under the action of the vacuum pumping pump and the exhaust fan on the cyclone separator, reduces the hot air temperature during centrifugal drying of the immobilized enzyme liquid, and improves the activity of the immobilized enzyme after drying.
In the centrifugal drying process, the fed hot air moves downwards spirally in the centrifugal drying chamber under the action of the hot air distributor, and the enzyme liquid is uniformly sprayed by the atomizing spray head and moves along with the action of the hot air. Meanwhile, the hollow rotary drum is driven by the hollow rotary shaft to rotate in the centrifugal drying chamber, the rotating direction is opposite to the hot air spiral direction, so that the hot air has a longer hot air moving path in the process of moving along the diversion spiral blades, the drying time of the hot air on materials is prolonged, and the drying effect of immobilized enzymes is ensured.
Meanwhile, the lower end of the hollow rotary drum and the lower end of the centrifugal drying chamber are uniformly exhausted, and the spiral movement direction of hot air cannot be influenced by the action of the flow guide spiral blade, so that the hot air can flow downwards along the direction of the flow guide spiral blade all the time. And finally, sucking most of the dried material into a cyclone separator for separation from the conveying pipe, sucking a small part of the dried material away from the lower end of the hollow rotary drum, and filtering the dried immobilized enzyme powder by a filter layer and then dropping in the process of flowing upwards along the hollow rotary drum.
As a further arrangement of the above scheme, a rotary support is connected in the centrifugal drying chamber below the hollow rotary drum, a baffling connection pipe connected with the conveying pipe is arranged at the lower end of the centrifugal drying chamber, a sealing bearing is arranged on the baffling connection pipe, and the hollow rotary shaft is rotatably connected with the rotary support and the sealing bearing. The design of the mounting bracket and the sealing bearing can ensure that the rotating shaft can stably rotate in the centrifugal drying chamber and does not swing due to air flow interference.
As a further arrangement of the scheme, a driving device is arranged on the hollow rotating shaft extending out of the sealing bearing, and the lower end of the hollow rotating shaft is connected with the vacuumizing pipe through a sealing rotating connector. The driving device is arranged outside the centrifugal drying chamber, so that the driving device is not interfered by internal airflow.
As a specific arrangement of the above scheme, the driving device includes a gear box and a motor, a driven gear is arranged on a hollow rotating shaft in the gear box, and an output shaft of the motor is connected with a driving gear engaged with the driven gear. The above is a specific design scheme of the driving device, and the directional rotation of the hollow rotating shaft can be realized through gear meshing transmission and power input of the motor.
In the above specific arrangement, the plurality of pumping ports are provided on the hollow rotating shaft, and are uniformly distributed on the outer circumferential surface of the upper end of the hollow rotating shaft. The even setting of above-mentioned extraction opening can make the inside gas of hollow rotary drum flow when being extracted even to guarantee the air current homogeneity of hollow rotary drum lower extreme opening part, avoid influencing hot-blast spiral motion's orbit because of hollow rotary drum lower extreme air current is inhomogeneous.
As a specific arrangement of the above scheme, the hot air generator is an air heater, and an air inlet of the air heater is connected with an air filter. Above-mentioned air heater can be through the hot-blast temperature of regulation production, and air cleaner can all filter the impurity in the hot-blast, guarantees dry hot-blast cleanliness simultaneously.
As the specific arrangement of the scheme, the hot air distributor and the atomizing spray head are both arranged at the center of the circle of the upper surface of the centrifugal drying chamber. The position setting with hot air distributor and atomizer can guarantee that the inside atomizing material of centrifugal drying chamber evenly is spiral downstream along with hot-blast, guarantees its motion trajectory's uniformity, improves the drying uniformity of handling back immobilized enzyme.
Compared with the existing centrifugal drier, the centrifugal drier has the following beneficial effects:
1) The centrifugal drying device disclosed by the invention enables the interior of the centrifugal drying chamber to be always maintained in a negative pressure state through the air pumping action in two directions, so that the hot air temperature required by the immobilized enzyme liquid during drying is reduced, the problem of activity reduction of the immobilized enzyme during high-temperature hot air drying is avoided, and the centrifugal drying device is particularly suitable for centrifugal drying of materials with high heat sensitivity.
2) When the centrifugal drying device performs air extraction in two directions, the air flow direction flows to the central axis position of the centrifugal drying chamber, and the effect of the diversion spiral blade is added, so that the problem that when the existing vacuum centrifugal drying machine performs negative pressure air extraction, hot air cannot move in a spiral track, and the contact time of atomized materials and the hot air is too short to dry completely can be effectively solved; meanwhile, the reverse rotation motion of the diversion spiral blades can increase the travel of the hot air spiral motion, improve the contact time of materials and hot air, and ensure the drying effect on immobilized enzymes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a first angular perspective structure of the present invention;
FIG. 2 is a schematic view of a second angular perspective structure according to the present invention;
FIG. 3 is a schematic view showing the inner plan structure of the centrifugal drying chamber according to the present invention;
FIG. 4 is an enlarged schematic view of FIG. 1 at A according to the present invention;
FIG. 5 is a perspective sectional view of the hollow drum and the hollow shaft according to the present invention.
The device comprises a centrifugal drying chamber 1, a cyclone separator 2, an enzyme liquid storage tank 3, an infusion tube 301, a delivery pump 302, a hot air generator 4, a hot air delivery tube 401, a vacuum pump 5, an air extraction tube 501, a hot air distributor 6, an atomizing nozzle 7, a hollow rotary drum 8, a flow guide spiral blade 9, a rotating support 10, a hollow rotating shaft 11, an air extraction opening 111, a baffling connection tube 12, a material delivery tube 13, a sealing bearing 14, a driving device 15, a gear box 151, a driving motor 152, a driving gear 153, a driven gear 154, a sealing rotating connector 16 and a filter layer 17.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the following examples with reference to the accompanying drawings 1 to 5.
Example 1
Example 1 discloses a centrifugal drying apparatus for preparing immobilized enzyme, referring to fig. 1 and fig. 2, the main components of the centrifugal drying apparatus include a centrifugal drying chamber 1, a cyclone 2, an enzyme liquid storage tank 3, a hot air generator 4 and a vacuum pump 5, and the above main components are all fixedly arranged on a frame.
Wherein, this centrifugal drying chamber 1 comprises last cylinder section and lower round platform section, and fixed mounting has hot air distributor 6 in the upper surface centre of a circle department of last cylinder section, and hot-blast distributor 6 through setting up can make the hot-blast of getting into centrifugal drying chamber 1 inside can be the motion in the downward round platform section of heliciform. The hot air generator 4 can select an air heater, and in order to ensure the cleanness of the hot air fed into the centrifugal drying chamber 1, an air filter (not shown in the figure) can be connected to the air inlet end of the air heater, the air filter can filter the sucked air to remove impurities in the air, and then a hot air delivery pipe 401 is connected to the air outlet end of the air heater and the hot air delivery pipe 401 is connected to the hot air distributor 6.
The top end of the centrifugal drying chamber 1 is connected with an atomizing nozzle 7 extending into the centrifugal drying chamber, the atomizing nozzle 7 is positioned at the right center of the hot air distributor 6, the lower end of the enzyme liquid storage tank 3 is connected with an infusion tube 301, the infusion tube 301 is provided with a delivery pump 302, and the end part of the infusion tube 301 is connected with the atomizing nozzle 7. In the centrifugal drying process, the enzyme liquid in the enzyme liquid storage tank 3 is continuously conveyed along the liquid conveying pipe 301 under the action of the conveying pump 302, and then is atomized and sprayed out from the atomizing nozzle 7, and the sprayed enzyme liquid is contacted with the fed hot air and moves downwards spirally along with the hot air.
The centrifugal drying device is mainly modified and shown in figures 3 and 4, a hollow rotary drum 8 is concentrically arranged in the upper cylindrical section of the centrifugal drying chamber 1, and the upper end of the hollow rotary drum 8 is sealed and the lower end is opened. The outer circular surface of the hollow rotary drum 8 is provided with a flow guide spiral blade 9, the number of turns of the flow guide spiral blade 9 is not less than three, a sufficiently long thread flow guide path is ensured, and the outer end of the flow guide spiral blade 9 is attached to the inner wall of the centrifugal drying chamber 1. A rotating support 10 is fixedly connected in the lower circular platform section of the centrifugal drying chamber 1, a hollow rotating shaft 11 is rotatably connected in the rotating support 10, the hollow rotating shaft 11 is coaxially arranged with the hollow rotating drum 8, the top end of the hollow rotating shaft 11 is fixedly connected with the top wall of the hollow rotating drum 8, the hollow rotating drum 8 and the flow guide spiral blade 9 can be driven to rotate in the centrifugal drying chamber 1 by the hollow rotating shaft 11, and the rotating direction of the hollow rotating shaft 11 is controlled to be opposite to the hot air spiral movement direction.
Be connected with baffling takeover 12 at the lower extreme of centrifugal drying chamber 1, the end of buckling of baffling takeover 12 is connected with material conveying pipe 13 to be connected material conveying pipe 13's tip and cyclone 2's upper end, make immobilized enzyme powder after the centrifugal drying can separate in entering cyclone 2 along baffling takeover 12, material conveying pipe 13 under the effect of air current.
The lower end of a deflection connecting pipe 12 right below the central axis of the hollow rotary drum 8 is provided with a sealing bearing 14, the lower end of a hollow rotary shaft 11 passes through the sealing bearing 14 and extends out of the deflection connecting pipe 12, and then the lower end of the hollow rotary shaft 11 extending out of the deflection connecting pipe 12 is provided with a driving device 15. The driving device 15 includes a gear box 151, a driving motor 152 is fixedly disposed on the gear box 151, a driving gear 153 is disposed on a motor shaft of the driving motor 152 extending into the gear box 151, and a driven gear 154 is disposed on the hollow rotating shaft 11 located in the gear box 151, and the hollow rotating shaft 11 can be rotated directionally by a power input of the driving motor 152 under a meshing transmission of the driving gear 153 and the driven gear 154.
Referring to fig. 4 and 5, a sealed rotary connector 16 is connected to the lower end of the hollow rotary shaft 11, and a suction pipe 501 is connected between the sealed rotary connector 16 and the vacuum pump 5. Meanwhile, the hollow rotating shaft 11 positioned at the upper end of the inner cavity of the hollow rotating drum 8 is provided with a plurality of air pumping ports 111 which are uniformly arranged on the outer circular surface of the upper end of the hollow rotating shaft 11, and then a filter layer 17 is arranged between the hollow rotating drum 8 and the hollow rotating shaft 11 below the air pumping ports 111.
The centrifugal drying device for preparing immobilized enzyme disclosed in this example 1 has the following specific operation steps and working principle:
before centrifugal drying is carried out on immobilized enzyme liquid, the interior of a centrifugal drying chamber 1 is pumped to a negative pressure state under the action of a vacuum pump 5 and a negative pressure fan externally connected to a cyclone separator 2, the negative pressure action on the cyclone separator 2 is stronger than that of the vacuum pump 5, and the vacuum degree of the centrifugal drying chamber 1 is controlled to be-80 to-70 Kpa under the common negative pressure action of the vacuum pump 5 and the cyclone separator. Then, the driving device 15 is started to drive the hollow rotating shaft 11 and the hollow rotating cylinder 8 to rotate in the centrifugal drying chamber 1, then the hot air generator 4 and the delivery pump 302 are started, hot air with the temperature of 95 to 100 ℃ is delivered into the hot air distributor 6 through the hot air generator 4, the hot air is enabled to spirally move downwards in the centrifugal drying chamber 1 under the action of the hot air distributor 6, and meanwhile, the immobilized enzyme liquid sprayed out of the atomizing nozzle 7 is enabled to spirally move along with the action of the hot air and is contacted with the immobilized enzyme liquid to be dried in the process of moving along with the hot air.
Because the inner circle of water conservancy diversion spiral leaf 9 is connected with hollow rotary drum 8, and the outer end of water conservancy diversion spiral leaf 9 is laminated with the inner wall of centrifugal drying chamber 1 mutually to make and formed a spiral flow path between water conservancy diversion spiral leaf 9, hollow rotary drum 8 and the centrifugal drying chamber 1 inner wall, hot-blast and spray solution that centrifugal drying chamber 1 upper end was sent into are gone on along spiral flow path's direction when downward spiral motion. Meanwhile, due to the action of the driving device 15, the rotating directions of the hollow rotating shaft 11 and the hollow rotating drum 8 in the centrifugal drying chamber 1 are opposite to the hot air spiral moving direction, the rotating direction of the diversion spiral blade 9 on the hollow rotating drum 8 is opposite to the hot air spiral moving direction, the hot air spiral moving distance is increased when the hot air moves in a spiral flow channel, the moving time of the hot air in the upper half part of the centrifugal drying chamber 1 is prolonged, the contact time of atomized liquid and the hot air is increased, and the atomized immobilized enzyme liquid can be completely dried under the hot air with relatively low temperature.
Finally, the hot air and the dried immobilized enzyme powder sent out from the spiral flow channel can enter the cyclone separator 2 along the material conveying pipe 13 for separation, and during the process that part of the hot air and the dried immobilized enzyme powder move upwards along the hollow rotary drum 8, the immobilized enzyme powder is filtered by the filter layer 17 and falls down, the hot air is pumped out by the vacuum pump 5, and finally the immobilized enzyme powder blocked by the filter layer 17 enters the cyclone separator 2 along the material conveying pipe 13 for separation.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a centrifugal drying device for preparing immobilized enzyme, includes centrifugal drying chamber, cyclone, holding vessel, hot-blast generater and evacuation pump, centrifugal drying chamber's upper end is provided with hot air distributor and atomizer, hot air distributor is connected through hot-blast pipeline with hot-blast generater, the holding vessel passes through the transfer line with atomizer and is connected, and is provided with the conveying pump on the transfer line, be connected with the conveyer pipe between centrifugal drying chamber's lower extreme and the cyclone, a serial communication port, be provided with upper end seal, lower extreme open-ended cavity rotary drum in the centrifugal drying chamber, the outer disc of cavity rotary drum is provided with the water conservancy diversion spiral leaf of laminating with centrifugal drying chamber inner wall, the roof of cavity rotary drum links firmly the cavity pivot that stretches out centrifugal drying chamber downwards, the extraction opening has been seted up to the upper end of cavity pivot, is located be provided with the filter layer in the cavity rotary drum of extraction opening below, the lower extreme seal rotation of cavity pivot is connected with evacuation pipe, evacuation pipe is connected with evacuation pump.
2. The centrifugal drying device for preparing immobilized enzyme according to claim 1, wherein a rotary bracket is connected in the centrifugal drying chamber below the hollow rotary drum, a baffling connecting pipe connected with the conveying pipe is arranged at the lower end of the centrifugal drying chamber, a sealing bearing is arranged on the baffling connecting pipe, and the hollow rotary shaft is rotatably connected with the rotary bracket and the sealing bearing.
3. The centrifugal drying apparatus for preparing immobilized enzyme according to claim 2, wherein a driving device is provided on the hollow rotating shaft extending out of the sealed bearing, and the lower end of the hollow rotating shaft is connected to the evacuation tube through a sealed rotating connector.
4. The centrifugal drying apparatus for preparing immobilized enzyme according to claim 3, wherein the driving device comprises a gear box and a motor, a driven gear is arranged on a hollow rotating shaft in the gear box, and a driving gear engaged with the driven gear is connected to an output shaft of the motor.
5. The centrifugal drying device for preparing immobilized enzyme according to claim 1, wherein the hollow rotating shaft is provided with a plurality of pumping ports which are uniformly distributed on the outer circumferential surface of the upper end of the hollow rotating shaft.
6. The centrifugal drying apparatus for preparing immobilized enzyme according to claim 1, wherein the hot air generator is a hot air blower, and an air filter is connected to an air inlet of the hot air blower.
7. The centrifugal drying device for preparing immobilized enzyme according to claim 1, wherein the hot air distributor and the atomizing spray head are both arranged at the center of the upper surface of the centrifugal drying chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211251816.2A CN115574548B (en) | 2022-10-13 | 2022-10-13 | Centrifugal drying device for preparing immobilized enzyme |
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| CN202211251816.2A CN115574548B (en) | 2022-10-13 | 2022-10-13 | Centrifugal drying device for preparing immobilized enzyme |
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