CN217442108U

CN217442108U - Continuous vacuum freeze drying system

Info

Publication number: CN217442108U
Application number: CN202221281779.5U
Authority: CN
Inventors: 陈智; 吕武; 郑军
Original assignee: Shanghai Pinshi Technology Co ltd
Current assignee: Shanghai Pinshi Technology Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-16
Anticipated expiration: 2032-05-27

Abstract

The utility model discloses a continuous type vacuum freeze drying system, concretely relates to vacuum freeze drying system field, including system ice unit, drying unit, cold trap unit, temperature control unit and vacuum control unit, system ice unit establishes at the drying unit top, cold trap unit and vacuum control unit all are equipped with a plurality ofly, and the cold trap unit establishes at system ice unit rear side, the vacuum control unit is established between drying unit and cold trap unit, temperature control unit establishes in cold trap unit bottom. The utility model discloses a with original same position, the production mode of different temperature of different time control and different vacuum adjusts to be in different positions, and the form production of the different temperature of same time control and different vacuum both can reduce like this and rise the energy waste that the temperature brought repeatedly, also can serialization automated production, improve equipment's output.

Description

Continuous vacuum freeze drying system

Technical Field

The utility model relates to a vacuum freeze drying system field, the more specifically continuous type vacuum freeze drying system that says so.

Background

The production mode of the existing freeze dryer is basically that materials are placed in a drying cabin of the freeze dryer, then the materials are put into a box to be cooled and pre-frozen, after the pre-freezing is finished, the cold trap is cooled, then the cold trap and the drying cabin are pre-vacuumized to be below a triple point, at the moment, the drying cabin begins to be heated up in a staged mode, before all free water is removed, the temperature is controlled to be below a eutectic point, after the free water is removed, the temperature is raised to be above the eutectic point, and crystal water begins to be removed. Because the vacuum in the drying chamber and cold trap during drying is below the triple point of water, the removed water flows directly to the cold trap in the form of water vapor where it is frozen again to ice.

It is known from the basic process flow of vacuum freeze drying that the drying chamber needs to have precise temperature control capability, and the drying chamber is cooled and then heated during freeze drying. During freeze-drying, the vacuum degree of the drying chamber needs to be controlled, the pre-freezing time is normal pressure, the vacuum degree needs to be controlled to a reasonable value below a triple point when the temperature is raised and the drying is started, and most products are controlled to be about 50Pa absolute pressure. The material moisture in the drying cabin is reduced to the required proportion and then the freeze-drying is finished; and then recovering the vacuum degree of the drying chamber to normal pressure, then opening the chamber door, and removing the dried material out of the drying chamber of the freeze dryer. And then repeating the operation of drying in the box to dry the materials of the second batch.

At present, the freeze-drying mode is batch production, cannot be continuously produced, and is not the optimal choice for mass freeze-drying production. In the mode, the drying cabin needs to be repeatedly lifted and lowered and repeatedly switched between normal pressure and vacuum according to the change of the freeze-drying period, so that the consumption of heat energy is greatly increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's above-mentioned defect, the utility model provides a continuous type vacuum freeze drying system, through with original same position, the production mode of different temperatures of different time control and different vacuum, the adjustment is for in different positions, the form production of the different temperatures of same time control and different vacuum, and it is extravagant both to have so reduced the energy that the temperature rise and fall repeatedly brought, also can serialization automated production, improve equipment's output.

In order to achieve the above object, the utility model provides a following technical scheme: continuous type vacuum freeze-drying system, including ice-making unit, drying unit, cold trap unit, temperature control unit and vacuum control unit, the ice-making unit is established at the drying unit top, cold trap unit and vacuum control unit all are equipped with a plurality ofly, and the cold trap unit establishes at the ice-making unit rear side, vacuum control unit establishes between drying unit and cold trap unit, temperature control unit establishes in cold trap unit bottom, at first sends the liquid material to the ice-making in the ice-making unit, then the borneol drops to the drying unit in, and the material that gets into the drying unit is sent to each temperature and vacuum area, the ejection of compact after the drying finishes.

In a preferred embodiment, the ice making unit comprises an ice bucket and a refrigerating unit connected to one side of the ice bucket, wherein a refrigerating wall of the ice bucket is composed of two hollow stainless steel plates, a refrigerant of the refrigerating unit is directly increased between the two stainless steel plates of the refrigerating wall to reduce the temperature of the refrigerating wall to a required temperature, a rotating shaft is arranged in the ice bucket, an ice skate and a distribution plate are arranged in the ice bucket, the ice skate is fixedly arranged at the outer end of the rotating shaft through a supporting rod and is in contact with the inner wall of the stainless steel plate of the refrigerating wall, the distribution plate is fixedly arranged at the outer end of the rotating shaft and is arranged above the ice skate, one side of the distribution plate is communicated with a pipeline for uniformly spraying liquid materials onto the refrigerating wall, a recovery tank is arranged at the bottom end in the ice bucket, a motor is fixedly arranged at the top end of the ice bucket, and the top end of the rotating shaft penetrates through the top end of the ice bucket and is fixedly connected with an output shaft of the motor, the distribution plate uniformly sprays the liquid material onto the ice making wall, the refrigerating unit reduces the temperature of the ice making wall to freeze the liquid material, and the rotating ice skate blade cuts the ice on the ice making wall into regular rhombuses and then drops the ice.

In a preferred embodiment, a feed liquid tank is arranged at the rear side of the ice bucket, liquid materials in the feed liquid tank are conveyed into a distribution plate of the ice bucket through a water pump, the feed liquid tank is communicated with the recovery tank through a pipeline, and redundant feed liquid is recovered to the total feed liquid tank through the recovery tank.

In a preferred embodiment, the drying unit comprises a drying chamber, two feeding chambers are arranged at the top of the drying chamber, one feeding chamber is communicated with the bottom end of an ice bucket of the ice making unit, the ice pieces enter the drying unit through the feeding chamber, a vibrating and distributing mechanism used for uniformly distributing the ice pieces into the drying chamber is arranged at the bottom of the feeding chamber, and the other feeding chamber is communicated with the inside of the drying chamber and used for feeding materials in the drying chamber.

In a preferred embodiment, a plurality of layers of mesh belt conveyors are arranged inside the drying cabin, the upper mesh belt conveyor and the lower mesh belt conveyor are arranged in a staggered mode, materials naturally fall onto the lower mesh belt layer from the end of the upper mesh belt layer, the mesh belt conveyors are connected with a conveyor motor and a mesh belt shaft through permanent magnet couplings, and a scraper device used for limiting the thickness of ice on the mesh belt is arranged on the upper portion of the first mesh belt conveyor, so that the situation that the ice layer at a local position is too thick and is dried slowly is avoided.

In a preferred embodiment, a partition capable of heating and cooling is arranged in the middle of each layer of mesh belt conveyor and used for controlling the temperature of the area, and the temperature control unit consists of a compressor refrigeration system and an electric heating or steam heating system and transmits heat or cold to the partition in the drying cabin.

In a preferred embodiment, a screw conveyor is fixedly arranged at the bottom of the drying chamber, a material temporary storage tank is arranged at the bottom of the screw conveyor, dried materials fall into the screw conveyor, and then the screw conveyor conveys the materials to the material temporary storage tank.

In a preferred embodiment, the cold trap units are connected with the drying unit through mushroom valves, the cold traps are traps for trapping gas on a cooled surface in a condensation mode, more than two cold trap units are connected with one drying unit, one cold trap unit is communicated with the drying chamber to perform ice trapping operation, and the other cold trap unit is disconnected with the drying chamber to perform defrosting, draining, vacuumizing again and waiting for being merged into the drying chamber to operate.

In a preferred embodiment, the vacuum control unit consists of a vacuum pump set and an air inlet control system, the vacuum pump set is used for establishing a vacuum environment in the drying chamber and the cold trap and pumping out the non-condensable gas in the drying chamber, and the air inlet control system is used for accurately supplementing air into the drying chamber through the opening and closing of a valve so as to control the vacuum degree in the drying chamber.

In a preferred embodiment, the inside of the drying chamber is further provided with an sterility assurance unit, the sterility assurance unit comprises an online cleaning system and an online sterilization system, the online cleaning system sends cleaning liquid to nozzles in the drying chamber and the cold trap through pipelines to spray and clean, and the online sterilization system distributes steam in the chamber through pipelines to sterilize.

The utility model discloses a technological effect and advantage:

the utility model discloses at first send the liquid material to system ice in the ice-making unit, then the borneol gets into dry unit, and be carried to each temperature and vacuum region, the ejection of compact after the drying finishes, through with original same position, the production mode of different temperatures of different time control and different vacuum, the adjustment is in different positions, the form production of the different temperatures of same time control and different vacuum, so both can reduce the energy waste that the temperature rise and fall repeatedly and bring, also can serialization automated production, improve equipment's output.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a side view of the present invention;

fig. 3 is a top view of the present invention;

fig. 4 is a front view of the ice-making unit of the present invention;

fig. 5 is a side view of the ice-making unit of the present invention;

fig. 6 is a top view of the ice-making unit of the present invention;

fig. 7 is a structural view of an ice bucket of the ice making unit of the present invention.

The reference signs are: the system comprises an ice making unit 1, a drying unit 2, a cold trap unit 3, a temperature control unit 4, a vacuum control unit 5, a material temporary storage tank 6, an ice bucket 11, a refrigerating unit 12, a refrigerating wall 13, a rotating shaft 14, an ice blade 15, a distribution plate 16, a recovery tank 17 and a motor 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to the attached drawings 1-3 of the specification, the continuous vacuum freeze drying system comprises an ice making unit 1, a drying unit 2, a cold trap unit 3, a temperature control unit 4 and a vacuum control unit 5, wherein the ice making unit 1 is arranged at the top of the drying unit 2, the cold trap units 3 and the vacuum control units 5 are respectively provided with a plurality of units, the cold trap unit 3 is arranged at the rear side of the ice making unit 1, the vacuum control unit 5 is arranged between the drying unit 2 and the cold trap unit 3, and the temperature control unit 4 is arranged at the bottom of the cold trap unit 3.

Referring to the attached figures 4-7 of the specification, the ice making unit comprises an ice bucket 11 and a refrigerating unit 12 connected to one side of the ice bucket 11, the refrigerating unit 12 adopts a water cooling system composed of a single-machine double-pole compressor, the temperature of the final finished ice product can be lowered to below-50 ℃, a refrigerating wall 13 of the ice bucket 11 is composed of two hollow stainless steel plates, a refrigerant of the refrigerating unit 12 is directly increased between the two stainless steel plates of the refrigerating wall 13 to lower the temperature of the refrigerating wall 13 to a required temperature, a rotating shaft 14 is arranged in the ice bucket 11, an ice skate 15 and a distribution disc 16 are arranged in the ice bucket 11, the ice skate 15 is fixedly arranged at the outer end of the rotating shaft 14 through a supporting rod, the ice skate 15 is in contact with the inner wall of the stainless steel plate of the refrigerating wall 13, the ice skate 15 makes a circular motion around the refrigerating wall 13 to cut the ice on the refrigerating wall 13 into regular rhombuses, the thickness of the ice pieces can be controlled by the rotating speed of the ice skate 15 and the distance between the ice skate and the refrigerating wall 13, the thickness of the ice bucket is controlled to be 2-5mm, the distribution disc 16 is fixedly arranged at the outer end of the rotating shaft 14 and above the ice skate 15, one side of the distribution disc 16 is communicated with a pipeline used for uniformly spraying liquid materials onto the refrigeration wall 13, the bottom end inside the ice bucket 11 is provided with a recovery tank 17, the top end of the ice bucket 11 is fixedly provided with a motor 18, the driving speed of the motor 18 is adjustable, the top end of the rotating shaft 14 penetrates through the top end of the ice bucket 11 and is fixedly connected with an output shaft of the motor 18, the rear side of the ice bucket 11 is provided with a liquid tank, the liquid materials in the liquid tank are conveyed into the distribution disc 16 of the ice bucket 11 through a water pump, and the liquid tank is communicated with the recovery tank 17 through a pipeline.

The motor 18 drives the ice skate 15 and the distribution disc 16 to rotate, the distribution disc 16 rotates to uniformly spray the liquid material onto the refrigeration wall 13, then the refrigerant of the refrigeration unit 12 is increased between two layers of stainless steel plates of the refrigeration wall 13 to reduce the temperature of the refrigeration wall 13 to the required temperature, so that the liquid material is frozen, the ice skate 15 surrounds the refrigeration wall 13 to make circular motion, the ice on the refrigeration wall 13 can be cut into regular rhombuses, then the ice falls off, and the redundant liquid material is recycled into the total liquid tank through the recycling groove 17.

The drying unit comprises a drying cabin, two feeding cabins are arranged at the top of the drying cabin, one feeding cabin is communicated with the bottom end of an ice bucket 11 of the ice making unit, ice pieces cut from the ice bucket 11 fall into the drying cabin, a vibration distributing mechanism is arranged at the bottom of the feeding cabin, the vibration distributing mechanism adopts a vibrating motor to drive a mesh belt of a first-layer mesh belt conveyor to vibrate, so that the ice pieces move on the mesh belt, the ice pieces are uniformly distributed on the first-layer mesh belt conveyor in the drying cabin, and the other feeding cabin is communicated with the inside of the drying cabin and is responsible for feeding the drying cabin.

The drying cabin is internally provided with a plurality of layers of mesh belt conveyors, the mesh belt conveyors are material handling machines for continuously conveying materials on a certain line, the mesh belt conveyors are driven by the conveyor motors, metal mesh belts are used as conveying carriers, the mesh belt conveyors on the upper layer and the lower layer are arranged in a staggered manner, and the materials naturally fall onto the mesh belt on the next layer at the end of the mesh belt on the upper layer.

Because the whole inside of the drying cabin is in a vacuum state, but the motor of the mesh belt conveyor cannot work under the environment, in order to reduce the leakage in the box, the mesh belt conveyor in the cabin adopts a permanent magnet coupling to connect the motor of the conveyor and the mesh belt shaft, and therefore the leakage problem of the traditional coupling under the vacuum environment can be avoided. The permanent magnet coupler is a novel coupler for connecting a prime motor and a working machine through the magnetic force of a permanent magnet, the permanent magnet coupler does not need direct mechanical connection, mechanical energy is transmitted by utilizing the interaction between rare earth permanent magnets and the characteristic that a magnetic field can penetrate a certain space distance and a material, and the leakage problem of dynamic seal in certain mechanical devices can be solved.

The upper part of the first layer mesh belt conveyor is provided with a scraper device, and the scraper device adopts a scraper fixed in the cabin and is used for limiting the thickness of ice on the mesh belt and avoiding the phenomenon that the ice layer is too thick and is dried slowly at a local position.

The middle of every layer of mesh belt conveyor is provided with the baffle that can heat up the cooling for control this regional temperature, temperature control unit 4 comprises compressor refrigerating system and electrical heating or steam heating system, makes its intensification or cooling through temperature control unit 4 with heat transfer to baffle, then the baffle gives the material with energy transfer, and the baffle in the drying chamber is on material advancing direction, divide into a plurality of independent temperature control unit to satisfy the demand of material in the different strokes to the temperature.

The principle of a compressor refrigeration system is that low-pressure steam is compressed into high-pressure steam, so that the volume of the steam is reduced, the pressure is increased, the compressor sucks low-pressure working medium steam from an evaporator, the low-pressure working medium steam is sent into a condenser after the pressure is increased, the high-pressure working medium steam is condensed into high-pressure liquid in the condenser, the high-pressure liquid is sent into the evaporator after being throttled by a throttle valve and becomes low-pressure liquid, the low-pressure liquid is evaporated by absorbing heat in the evaporator to become low-pressure steam, and then the low-pressure steam is sent into an inlet of the compressor, so that the refrigeration cycle is completed; the electric heating system adopts an electric heater; the steam heating system adopts a steam heater, and mainly utilizes the heat released by steam to heat.

The screw conveyor is fixedly arranged at the bottom of the drying cabin, the material temporary storage tank 6 is arranged at the bottom of the screw conveyor, and finally, the dried material falls into the screw conveyor at the bottom, is conveyed to the material temporary storage tank 6 through the screw conveyor, and is conveyed out of the drying material in the tank at regular intervals.

The cold trap unit 3 is connected with the drying unit 2 through a mushroom valve, one drying unit 2 is connected with more than two cold trap units 3, one cold trap unit 3 is communicated with the drying cabin to perform ice catching operation, the other cold trap unit 3 is disconnected with the drying cabin to perform defrosting, draining, vacuumizing again, and waiting for being merged into the drying cabin so as to ensure that the drying cabin can continuously sublimate and dry materials.

The vacuum control unit 5 is composed of a vacuum pump set and an air inlet control system, the vacuum pump set is used for establishing vacuum environments in the drying cabin and the cold trap and pumping out non-condensable gas in the drying cabin, and the air inlet control system accurately supplements air into the drying cabin through the opening and closing of a valve so as to control the vacuum degree in the drying cabin.

The inside aseptic guarantee unit that still is equipped with of drying cabin, aseptic guarantee unit include online cleaning system and online sterilization system, and online cleaning system sends the washing liquid to spray in the nozzle in drying cabin and the cold-trap through the pipeline and washs, and online sterilization system distributes steam in the cabin through the pipeline and disinfects, and the under-deck temperature rises to 121 ℃, and constant temperature 30min to reach sterilization effect. And finally, starting a water ring vacuum pump, vacuumizing the box to vaporize the moisture in the box, and drying the interior of the drying cabin and the interior of the cold trap.

And finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Continuous type vacuum freeze-drying system, its characterized in that: including ice-making unit (1), drying unit (2), cold trap unit (3), temperature control unit (4) and vacuum control unit (5), establish at drying unit (2) top ice-making unit (1), cold trap unit (3) and vacuum control unit (5) all are equipped with a plurality ofly, and establish at ice-making unit (1) rear side cold trap unit (3), establish between drying unit (2) and cold trap unit (3) vacuum control unit (5), temperature control unit (4) are established in cold trap unit (3) bottom.

2. The continuous vacuum freeze-drying system of claim 1, wherein: the ice making unit comprises an ice bucket (11) and a refrigerating unit (12) connected to one side of the ice bucket (11), wherein a refrigerating wall (13) of the ice bucket (11) is composed of two hollow stainless steel plates, a refrigerant of the refrigerating unit (12) is directly increased between the two stainless steel plates of the refrigerating wall (13) to reduce the temperature of the refrigerating wall (13) to a required temperature, a rotating shaft (14) is arranged inside the ice bucket (11), an ice skate (15) and a distribution disc (16) are arranged inside the ice bucket (11), the ice skate (15) is fixedly arranged at the outer end of the rotating shaft (14) through a supporting rod, the ice skate (15) is in contact with the inner wall of the inner stainless steel plate of the refrigerating wall (13), the distribution disc (16) is fixedly arranged at the outer end of the rotating shaft (14) and above the ice skate (15), one side of the distribution disc (16) is communicated with a pipeline used for uniformly spraying liquid materials onto the refrigerating wall (13), a recycling groove (17) is formed in the bottom end of the interior of the ice bucket (11), a motor (18) is fixedly arranged at the top end of the ice bucket (11), and the top end of the rotating shaft (14) penetrates through the top end of the ice bucket (11) and is fixedly connected with an output shaft of the motor (18).

3. The continuous vacuum freeze-drying system of claim 2, wherein: the rear side of the ice bucket (11) is provided with a liquid feed tank, liquid materials in the liquid feed tank are conveyed into a distribution disc (16) of the ice bucket (11) through a water pump, and the liquid feed tank is communicated with a recovery tank (17) through a pipeline.

4. The continuous vacuum freeze-drying system of claim 2, wherein: the drying unit comprises a drying cabin, two feeding cabins are arranged at the top of the drying cabin, one feeding cabin is communicated with the bottom end of an ice bucket (11) of the ice making unit, a vibration distributing mechanism used for uniformly distributing the ice pieces into the drying cabin is arranged at the bottom of the feeding cabin, and the other feeding cabin is communicated with the inside of the drying cabin.

5. The continuous vacuum freeze-drying system of claim 4, wherein: the drying cabin is internally provided with a plurality of layers of mesh belt conveyors, the upper layer mesh belt conveyor and the lower layer mesh belt conveyor are arranged in a staggered manner, the mesh belt conveyors are connected with a conveyor motor and a mesh belt shaft by permanent magnet couplings, and the upper part of the first layer mesh belt conveyor is provided with a scraper device for limiting the thickness of ice on the mesh belt.

6. The continuous vacuum freeze-drying system of claim 5, wherein: the middle of each layer of mesh belt conveyor is provided with a partition plate capable of heating and cooling, and the temperature control unit (4) consists of a compressor refrigeration system and an electric heating or steam heating system and transmits heat or cold to the partition plate in the drying cabin.

7. The continuous vacuum freeze-drying system of claim 4, wherein: the bottom of the drying cabin is fixedly provided with a screw conveyor, and the bottom of the screw conveyor is provided with a material temporary storage tank (6).

8. The continuous vacuum freeze-drying system of claim 4, wherein: the cold trap unit (3) is connected with the drying unit (2) through a mushroom valve, one drying unit (2) is connected with more than two cold trap units (3), one cold trap unit (3) is communicated with the drying cabin to perform ice catching operation, and the other cold trap unit (3) is disconnected with the drying cabin to perform defrosting, draining, vacuumizing again and waiting for merging into the drying cabin for operation.

9. The continuous vacuum freeze-drying system of claim 4, wherein: the vacuum control unit (5) consists of a vacuum pump set and an air inlet control system, the vacuum pump set is used for establishing vacuum environments in the drying cabin and the cold trap and pumping out non-condensable gas in the drying cabin, and the air inlet control system accurately supplements air into the drying cabin through the opening and closing of a valve so as to control the vacuum degree in the drying cabin.

10. The continuous vacuum freeze-drying system of claim 4, wherein: the inside aseptic guarantee unit that still is equipped with of drying chamber, aseptic guarantee unit include online cleaning system and online sterilization system, and online cleaning system sends the washing liquid to the nozzle in drying chamber and the cold-trap through the pipeline and spouts the washing, and online sterilization system is disinfected in the under-deck with steam distribution through the pipeline.