CN115790113A

CN115790113A - Continuous freeze-drying system and method

Info

Publication number: CN115790113A
Application number: CN202211554296.2A
Authority: CN
Inventors: 宋茂斌; 张君
Original assignee: Truking Technology Ltd
Current assignee: Truking Technology Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-03-14

Abstract

The invention discloses a continuous freeze-drying system, which comprises a freezing area for freezing materials, a loading station for placing a tray filled with the frozen materials into transportation equipment, a drying bin for drying the materials, a discharging area and a conveying track, wherein the conveying track penetrates through the drying bin, the drying bin comprises a drying area for mounting a drying plate layer and buffer areas arranged at two ends of the drying area, a partition plate capable of separating the two areas is arranged between the buffer areas and the drying area, and the transportation equipment can move along the conveying track; the material treated by the freezing zone is loaded on the movable transportation equipment and moves along the conveying track, and the transportation equipment can realize that the drying work of the drying zone does not need to be suspended under the matching of the buffer zone and the drying zone, and the transportation equipment continuously and uninterruptedly goes in and out of the drying bin for drying treatment, so that the drying efficiency is high, and the production of enterprises is facilitated.

Description

Continuous freeze-drying system and method

Technical Field

The invention relates to the technical field of freeze-drying equipment, in particular to a continuous freeze-drying system and a continuous freeze-drying method.

Background

Freeze drying is a technique for drying by utilizing the principle of sublimation, and is a process of quickly freezing a dried substance at a low temperature, and then directly sublimating frozen water molecules into water vapor to escape in a proper vacuum environment. The product obtained by freeze-drying is called lyophilisate (lyophilizer) and the process is called lyophilisation (lyophilisation). The substance is always in a low temperature (frozen state) before being dried, and the ice crystals are uniformly distributed in the substance, so that the concentration phenomenon caused by dehydration can not occur in the sublimation process, and the side effects of foam, oxidation and the like generated by water vapor are avoided. The dried substance is in a porous shape of dry sponge, the volume is basically unchanged, and the dried substance is easy to dissolve in water and recover to the original shape. Physicochemical and biological denaturation of the dried material is prevented to the maximum extent.

The vacuum freeze drying technology has wide application in the fields of bioengineering, medicine industry, food industry, material science, deep processing of agricultural and sideline products and the like. The freeze drying of the medicine comprises western medicine and traditional Chinese medicine. The freeze drying of western medicines has been developed to a certain extent in China, and many larger pharmaceutical factories have freeze drying equipment.

Continuous vacuum freeze drying equipment is explored and used at home and abroad. The continuous equipment is characterized by being suitable for the production of products with single variety, large output and sufficient raw materials, and is particularly suitable for the production of slurry and granular products. The continuous type equipment easily realizes automated control, has simplified manual operation and management, and current continuous type freeze-drying equipment is as follows like patent number: the continuous processing type freeze-drying system and the method of CN202110218760.X adopt continuous and circular operation process flow as the material feeding device, thereby realizing the uninterrupted production of freeze-dried products, improving the production efficiency of freeze-drying equipment, reducing the cycle times of materials, reducing the contact time of the materials and the outside and improving the quality of the freeze-dried products. In the technology, the materials are freeze-dried in batches, the freeze-drying efficiency of the large batch of materials is low due to the limitation of the size of a freeze-dryer, and the requirements of high yield and continuous use of food drying cannot be well met.

Disclosure of Invention

The invention aims to provide a system and a method for continuously freeze-drying a product, and solves the problems that in the prior art, the freeze-drying efficiency of large-batch materials is low, and the high yield and continuous use requirements of food drying cannot be well met.

The invention is realized in such a way that a continuous freeze-drying system comprises a freezing area for freezing materials, a loading station for placing a tray filled with the frozen materials into transportation equipment, a drying bin for drying the materials, a discharging area and a conveying track, wherein the conveying track penetrates through the drying bin,

the drying bin comprises a drying area and buffer areas, the drying area is used for installing a drying plate layer, the buffer areas are arranged at two ends of the drying area, a partition plate capable of separating two areas is arranged between the buffer areas, and the conveying equipment can move along the conveying track.

The material after freezing district's processing loads on the haulage equipment that can remove, moves along transfer orbit, and haulage equipment can realize that the drying work in drying district need not pause under the cooperation of buffer zone and drying district, carries out drying process in the uninterrupted business turn over drying storehouse of haulage equipment, and drying efficiency is high, is favorable to the production of enterprise.

A partition board capable of separating the two areas is arranged between the drying area and the buffer area, when the buffer area needs to be communicated with the outside, the buffer area and the drying area are separated through the partition board to avoid the influence on the drying area, and the drying treatment procedure of the drying area is ensured; when the transportation equipment needs to enter and exit the drying area, the partition plate is opened, and the transportation equipment can smoothly and continuously move in the drying bin; because the work of drying zone is incessant, guarantee that the material on the haulage equipment can incessant carry out continuous drying process, improved the utilization ratio of equipment, increased the output of freeze-dried product, inside framework is simple, and the maintenance of being convenient for operates reliably.

The invention further adopts the technical scheme that: the drying area comprises a plurality of temperature control areas, and the temperature control areas are connected with heating components respectively.

A plurality of temperature control district in the drying zone, every temperature control district all is connected with heating element is independent, can be so that the temperature in independent control temperature control district, the demand according to the material of difference selects different heating temperature, and the suitability is high.

The further technical scheme of the invention is as follows: and (4) carrying out ice catching on water vapor generated by heating treatment in the drying zone through a cold trap.

The further technical scheme of the invention is as follows: and a vacuum system, a cold trap, a refrigerating system and a circulating system are arranged outside the drying bin. The vacuum system is connected with the drying bin through the cold trap, when vacuum pumping is carried out, the water vapor of the materials in the drying bin is subjected to ice catching treatment, the drying bin is connected with the vacuum system through the cold trap, and the cold trap is connected with the refrigerating system.

The further technical scheme of the invention is as follows: the buffer area can be connected with the vacuum system for vacuumizing treatment, or the buffer area is directly externally connected with a vacuumizing device for vacuumizing treatment.

The further technical scheme of the invention is as follows: the temperature in a plurality of temperature control areas is gradually increased along the direction of the discharging area.

The drying degree of the materials entering the drying area is different at different time, the temperature from the input end to the output end of the drying bin is gradually increased, and the materials are more sufficiently dried.

The temperature of a plurality of temperature control areas is different, the process flows of different products can be effectively adapted, each set of plate layer is provided with a circulating system independently, the temperature difference of different process stages is guaranteed, the requirements of different products are met, and therefore the drying quality of the products is improved.

The further technical scheme of the invention is as follows: the transportation equipment includes the support body, with loose pulley assembly that the support body top is connected and with the drive connection spare that the support body bottom is connected, the support body is used for placing the tray, loose pulley assembly with delivery track sliding connection, drive connection spare with arrange in drive assembly cooperation in the dry storehouse, drive assembly is used for the drive transportation equipment is followed the feed end in dry storehouse moves to the discharge end.

The further technical scheme of the invention is as follows: the bottom of the transportation equipment is provided with a driving connecting piece matched with the driving component, the top of the transportation equipment is provided with a pulley component matched with the rail, the transportation equipment moves along the freeze dryer under the action of the driving component after entering the drying bin, and the transportation equipment is driven by the driving component in the drying bin, so that the transportation equipment can continuously enter and exit the drying bin, the materials in the tray can be continuously subjected to freeze-drying treatment, and the working efficiency is ensured.

The further technical scheme of the invention is as follows: the support body includes that both sides are unsettled accepts the board, and the tray is arranged in accept on the board.

Accept the board in the both sides of support body main part, what have the tray accepts the board and arranges the heating process on the dry sheet layer of dry storehouse both sides in, need not carry out material loading to dry sheet layer with the tray from accepting the board in dry storehouse on to save time reduces the structure of the supplementary unloading of unloading in dry storehouse inside, saves space.

The conveying equipment comprises a plurality of groups of pulley assemblies, and the distance between every two adjacent pulley assemblies is larger than the butt joint gap between the conveying rails.

The invention further adopts the technical scheme that: the conveying track comprises a first track arranged in the drying bin and a second track arranged outside the drying bin and connected with the output end of the drying bin, the unloading area, the loading station and the input end of the drying bin.

The further technical scheme of the invention is as follows: the conveying track can be arranged at the bottom of the drying bin, and can also be arranged at the top of the drying bin.

The invention further adopts the technical scheme that: the first track and the second track are in butt joint in a clearance mode, the butt joint clearance of the first track and the second track does not influence the operation of transportation equipment, and the bin gate is opened through a gate valve structure. Aiming at the drying bin with the bin door needing to be opened outwards, the butt joint of the second track and the first track can be designed into a rotary folding structure, so that the second track is prevented from influencing the opening of the bin door.

First track has the clearance of butt joint with the second track, in order to guarantee the clearance that the transportation equipment can be stable through the butt joint, the distance between the adjacent loose pulley assembly is greater than the butt joint clearance in the transportation equipment to avoid appearing the phenomenon of transportation equipment "kou", guarantee the stability of transporting.

The delivery track runs through dry storehouse and through district and the loading station of unloading for the haulage equipment can circulate the transportation on the delivery track, and the design of buffer and dry zone in the dry storehouse of cooperation and the baffle that can cut off two intervals, the dry zone can carry out incessant drying to the material on the haulage equipment that enters into in the dry zone, guarantees dry efficiency, and the haulage equipment can recycle.

The invention further adopts the technical scheme that: be equipped with drive assembly in the dry storehouse, drive assembly includes that driving piece and cover establish drive wheel on the driving piece, the transportation equipment bottom be equipped with drive wheel drive complex drive connecting piece.

The driving assembly can continuously drive the transportation equipment passing through the driving assembly, and the transportation equipment stably runs in the drying bin under the action of the driving assembly and the conveying track.

The further technical scheme of the invention is as follows: the driving piece comprises a main driving structure, a driven structure and a transmission structure, the main driving structure and the driven structure form synchronous motion through the transmission structure, and the transportation equipment moves between the driving assemblies.

The further technical scheme of the invention is as follows: be equipped with multiunit drive assembly in the dry storehouse, independent each other between every set of drive assembly to guarantee that same haulage equipment can still can the steady operation in a plurality of dry storehouses of equipment, improve the accommodation of dolly.

The transmission structure and the driven structure move synchronously, so that the transportation equipment on the driving piece can stably move forwards to finish transferring.

The invention further adopts the technical scheme that: the main driving structure comprises a driving motor and a driving rotating shaft connected with the output end of the driving motor, the driven structure comprises a driven rotating shaft, and the transmission structure is a synchronous belt structure or a chain structure.

The driving rotating shaft is sleeved with a driving belt wheel, the driven rotating shaft is sleeved with a driven belt wheel, and the driving belt wheel is connected with the driven belt wheel through the driven structure. The driving belt wheel and the driven belt wheel can be replaced by chain wheels, and the transmission structure at the moment is a chain structure.

The driving motor is a variable frequency motor. The transmission structure can also be other structures which can enable the driving structure and the driven structure to move synchronously, such as a rack.

The distance between the driving rotating shaft and the driven rotating shaft is smaller than the length of the driving connecting piece, so that at least one driving wheel is matched with the driving connecting piece at the same time, continuous power of the transportation equipment in the drying bin is guaranteed, and the situation that the transportation equipment is stagnated in the drying bin during operation is avoided.

The further technical scheme of the invention is as follows: the output end of the driving motor is connected with the driving rotating shaft through a coupler.

The further technical scheme of the invention is as follows: the driving wheel comprises a main driving wheel and a driven wheel, wherein the main driving wheel is sleeved on the main driving structure, and the driven wheel is sleeved on the driven structure.

When the main driving wheel and the driven wheel are chain wheels, the driving connecting piece is a chain matched with the chain wheels.

When the main driving wheel and the driven wheel are gears, the driving connecting piece is a rack matched with the gears.

The further technical scheme of the invention is as follows: the output end of the driving motor is connected with the shell of the drying bin in a sealing and rotatable mode through the sealing flange, and the temperature in the drying bin is guaranteed to be maintained stably.

The further technical scheme of the invention is as follows: the driving connecting piece is a rack or a chain, and the driving connecting piece is in synchronous driving fit with the driving wheel.

The invention also provides a continuous freeze-drying method based on the freeze-drying system, which comprises the following steps:

s1, taking out a tray filled with frozen materials from a freezing area, putting the tray on a transportation device at a loading station, and enabling the transportation device to enter a buffer area at the input end of a drying bin along a conveying track and then enter a drying area;

s2, when the time of the transport equipment in the drying area reaches a set time, the transport equipment moves towards a buffer area at the output end of the drying bin, and the next transport equipment enters the drying area;

s3, repeating the step S2 until the transportation equipment enters a buffer area at the output end of the drying bin;

and S4, the transportation equipment enters the unloading area to take down the tray and returns to the loading station.

The invention further adopts the technical scheme that: the buffer area comprises a first buffer area at the input end of the drying bin and a second buffer area at the output end of the drying bin; the drying area and the buffer area are matched as follows: when the transportation equipment enters a first buffer area from the outside, adjusting the vacuum degree of the drying area and the first buffer area, opening a partition plate between the first buffer area and the drying area after the vacuum degree is within a certain range, so that the first buffer area is communicated with the drying area, the first transportation equipment enters the drying area, the first transportation equipment moves towards a second buffer area after the first transportation equipment is dried in the drying area for a set time, the second transportation equipment enters the original position of the first transportation equipment in the drying area from the first buffer area, drying treatment is carried out, and the like until the first transportation equipment enters the second buffer area; in the process, the materials entering the drying area firstly cannot be affected by the materials entering the drying area later, the drying progress of the materials is not required to be suspended, the drying area is always in a working state, the materials in the drying area are dried uninterruptedly, the continuity of drying is achieved, and the working efficiency is guaranteed.

The further technical scheme of the invention is as follows: the conveying equipment continuously enters the second buffer area from the drying area, and simultaneously the materials to be dried enter the drying area from the first buffer area under the action of the conveying equipment, so that continuous and uninterrupted drying treatment is realized.

The further technical scheme of the invention is as follows: the second buffer area enters the transportation equipment of the unloading area, after the unloading area unloads, the dried products contained in the tray are transported to a packaging line to be packaged and boxed, the transportation equipment carries out loading to a loading station along a conveying track, and the transportation equipment waits for entering outside the first buffer area after loading so as to be recycled.

The invention further adopts the technical scheme that: the drying area is in a vacuum state, and before the transportation equipment enters and exits the drying area, the pressure difference between the buffer area and the drying area is in a set range.

The further technical scheme of the invention is as follows: before the door of the drying bin is opened, the pressure in the buffer area is adjusted to the atmospheric pressure. The safety of the working process is ensured.

The invention has the beneficial effects that: according to the invention, the material treated in the freezing area is loaded onto the movable transportation equipment and moves along the conveying track, the transportation equipment can realize that the drying work of the drying area does not need to be suspended under the matching of the buffer area and the drying area, the transportation equipment continuously and uninterruptedly enters and exits the drying bin for drying treatment, the drying efficiency is high, and the production of enterprises is facilitated;

a partition plate capable of separating two regions is arranged between the drying region and the buffer region, when the buffer region needs to be communicated with the outside, the buffer region and the drying region are separated by the partition plate to avoid the influence on the drying region, and the drying treatment procedure of the drying region is ensured; when the transportation equipment needs to enter and exit the drying area, the partition plate is opened, and the transportation equipment can smoothly and continuously move in the drying bin; the continuous drying treatment of the materials on the transportation equipment is ensured due to the uninterrupted work of the drying area, so that the utilization rate of the equipment is improved, the yield of freeze-dried products is increased, the internal architecture is simple, the maintenance is convenient, and the operation is reliable;

Drawings

FIG. 1 is a top view of a continuous lyophilization system provided by the present invention;

FIG. 2 is a schematic diagram of a buffer according to the present invention;

FIG. 3 is a schematic structural diagram of a drying chamber provided by the present invention;

FIG. 4 is a schematic structural view of a heating plate layer provided by the present invention;

FIG. 5 is a schematic structural view of a transportation device provided by the present invention;

FIG. 6 is a schematic view of the structure of the transportation device provided by the present invention;

fig. 7 is a schematic structural diagram of a driving assembly provided by the present invention.

Reference numerals: 1. the freeze-drying device comprises a freeze-drying device, 11 heating plate layers, 12 buffer zones, 13 drying bins, 14 cabin doors, 111 frame bodies, 112 pulley assemblies, 113 driving connecting pieces, 2 conveying tracks, 3 conveying devices, 4 driving assemblies, 41 driving structures, 42 driven structures, 43 driven structures, 5 connecting plate pieces, 6 refrigerating systems, 7 vacuum systems, 9 circulating systems, 10 cold traps, 411 driving motors, 414 driving rotating shafts, 421 driven rotating shafts, 416 driving gears, 423 driven gears, 43 transmission structures, 413 couplings, 412 sealing flanges, 415 driving pulleys and 422 driven pulleys.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms may be changed or adjusted without substantial change in the technical content.

The first embodiment is as follows:

fig. 1-7 show a continuous freeze-drying system comprising a freezing zone for freezing material, a loading station for placing trays containing frozen material into a transport device 3, a drying silo 1 for drying material, a discharge zone, and a conveying track 2, said conveying track 2 extending through said drying silo 1,

the dry storehouse is including the dry zone 13 that is used for installing dry sheet layer 11 and locate the buffer 12 at dry zone 13 both ends, buffer 12 with be equipped with between the dry zone 13 and cut off two intervals's baffle, haulage equipment 3 can be followed delivery track 2 removes.

In this embodiment, the drying zone 13 includes a plurality of temperature control zones, and the heating elements 6 are respectively connected to the plurality of temperature control zones.

In this example, the water vapor generated by the heating treatment in the drying zone was passed through a cold trap for ice trapping.

In this embodiment, a vacuum system 7, a cold trap 10, a refrigeration system 6, and a circulation system 9 are disposed outside the drying chamber 1. The vacuum system 7 is connected with the drying bin 1 through the cold trap 10, and during vacuum pumping, water vapor of materials in the drying bin 1 is subjected to ice catching treatment; the drying chamber 1 is connected with a vacuum system 7 through a cold trap 10, and the cold trap 10 is connected with a refrigerating system 6.

In this embodiment, the buffer area may be connected to the vacuum system for performing vacuum pumping, or the buffer area may be directly connected to a vacuum pumping device for performing vacuum pumping.

In this embodiment, the cold trap 10 includes a first cold trap, a second cold trap, and a third cold trap, which are arranged from the input end to the output end of the drying bin, and the first cold trap, the second cold trap, and the third cold trap continuously perform circulation defrosting, so that it is ensured that the cold trap is always used for ice catching during operation of the tray continuous freeze dryer, the effect of circulation ice catching and defrosting is achieved, a smaller ice catching area is used to achieve a larger ice catching effect, and the working efficiency of the cold trap is greatly improved.

In this embodiment, the first cold trap is closest to the product just entered, so the first cold trap will hit the upper ice trap limit first. When the first cold trap can not capture ice, the mushroom valve of the first cold trap is closed, high-pressure steam is put into the first cold trap to defrost, the second cold trap and the third cold trap work, when the ice capture amount of the second cold trap reaches the upper limit, the third cold trap starts to work, the defrosting time of the first cold trap is also finished, the first cold trap starts to be pumped to a vacuum state, the mushroom valve is opened, the first cold trap and the third cold trap start to capture ice simultaneously, when the ice capture amount of the third cold trap reaches the upper limit, the third cold trap stops working to defrost, the first cold trap and the second cold trap start to work simultaneously, and therefore circulating defrosting is carried out, and the fact that the cold traps capture ice all the time when the tray continuous freeze dryer works is guaranteed.

In this embodiment, the temperature in a plurality of said temperature controlled zones increases in steps in the direction of said discharge zone.

The drying degree of the materials entering the drying area at different time is different, the temperature from the input end to the output end of the drying bin is gradually increased, and the materials are more sufficiently dried.

In this embodiment, the transportation device 1 includes a frame body 111, a pulley assembly 112 connected to the top of the frame body 111, and a driving connecting member 113 connected to the bottom of the frame body 111, the frame body 111 is used for placing the tray, the pulley assembly 112 is slidably connected to the conveying track 2, the driving connecting member 113 is matched with a driving assembly 4 disposed in the drying bin 1, and the driving assembly 4 is used for driving the transportation device 1 to move to a discharging end along a feeding end of the drying bin 1.

The bottom of the transportation equipment is provided with a driving connecting piece matched with the driving component, the top of the transportation equipment is provided with a pulley component matched with the track, the transportation equipment moves along the freeze dryer under the action of the driving component after entering the drying bin, and the transportation equipment can continuously go in and out of the drying bin through the driving of the driving component in the drying bin, so that the materials in the tray can be continuously subjected to freeze-drying treatment, and the working efficiency is ensured.

In a preferred embodiment, the rack 111 includes a receiving plate with two suspended sides, and the tray is placed on the receiving plate.

The bearing plates are arranged on the two sides of the frame body, the bearing plates with the trays are arranged on the drying plate layers on the two sides of the drying bin for heating treatment, and the trays do not need to be loaded onto the drying plate layers from the bearing plates in the drying bin, so that the time is saved, the auxiliary loading and unloading structure in the drying bin is reduced, and the space is saved.

The transportation equipment comprises a plurality of groups of pulley assemblies, and the distance between every two adjacent pulley assemblies is larger than the butt joint gap between the conveying rails.

In this embodiment, the conveying track 2 includes a first track disposed in the drying bin 1 and a second track disposed outside the drying bin 1 and connected to the output end of the drying bin 1, the unloading area, the loading station and the input end of the drying bin 1.

As a preferred embodiment, the conveying track may be disposed at the bottom of the drying bin, and may also be disposed at the top of the drying bin.

In this embodiment, the first track and the butt joint of second track adopt the clearance butt joint, and the butt joint clearance of first track and second track does not influence the operation of transportation equipment, and the opening of bin gate is the push-pull valve structure who adopts.

First track and second track have the clearance of butt joint, in order to guarantee the clearance of the stable through butt joint of transportation equipment ability, the distance between the adjacent loose pulley assembly is greater than the butt joint clearance in the transportation equipment to avoid appearing the phenomenon of transportation equipment "kou", guarantee the stability of transporting.

As an alternative, for a drying bin which needs to open the bin door outwards, the joint of the second rail and the first rail can be designed into a rotary folding structure, so that the second rail is prevented from influencing the opening of the bin door.

The delivery track runs through dry storehouse and through district and the loading station of unloading for the haulage equipment can carry out the circulation transportation on the delivery track, and the design of buffer and dry district and the baffle that can cut off two intervals in the cooperation dry storehouse, dry district can carry out incessant drying to the material that enters into on the haulage equipment in the dry district, guarantees dry efficiency, and the haulage equipment can recycle.

In this embodiment, a driving assembly 4 is disposed in the drying bin 1, the driving assembly 4 includes a driving member and a driving wheel sleeved on the driving member, and a driving connecting member 113 engaged with the driving wheel is disposed at the bottom of the transportation device 3.

In this embodiment, the driving member comprises a main driving structure 41, a driven structure 42 and a transmission structure 43, the main driving structure 41 and the driven structure 42 form synchronous movement through the transmission structure 43, and the transportation device 3 moves between the driving assemblies 4.

In this embodiment, be equipped with multiunit drive assembly in the dry storehouse, independent each other between every set of drive assembly to guarantee that same haulage equipment can still can the steady operation in a plurality of dry storehouses of equipment, improve the accommodation of dolly.

In this embodiment, the main driving structure 41 includes a driving motor 411 and a driving rotating shaft 414 connected to an output end of the driving motor 411, the driven structure 42 includes a driven rotating shaft 421, and the transmission structure 43 is a synchronous belt structure or a chain structure.

The driving shaft 414 is sleeved with a driving pulley 415, the driven shaft 421 is sleeved with a driven pulley 422, and the driving pulley 415 is connected with the driven pulley 422 through the driven structure 42. The driving pulley 415 and the driven pulley 422 can be replaced by sprockets, and the transmission structure at this time is a chain structure.

In this embodiment, the output end of the driving motor 411 is connected to the driving shaft 414 through a coupling 413.

In this embodiment, the driving wheels include a main driving wheel 416 disposed on the main driving structure 41 and a driven wheel 423 disposed on the driven structure 42.

In a preferred embodiment, when the main driving wheel and the driven wheel are chain wheels, the driving connecting piece is a chain matched with the chain wheels.

In a preferred embodiment, when the main driving wheel and the driven wheel are gears, the driving connecting piece is a rack matched with the gears.

In this embodiment, the output end of the driving motor 411 is sealed and rotatably connected with the housing of the drying chamber through a sealing flange 412, so as to ensure that the temperature in the drying chamber is maintained stable.

In this embodiment, the driving link 113 is a rack or a chain, and the driving link 113 is in synchronous driving fit with the driving wheel.

The working principle of the invention is as follows: the material after freezing district's processing loads on the haulage equipment that can remove, moves along delivery track, and haulage equipment can realize that the drying work in drying district does not need to pause under the cooperation of buffer area and drying district, carries out drying process in the uninterrupted business turn over drying storehouse of haulage equipment in succession, and drying efficiency is high, is favorable to the production of enterprise. The buffer area is communicated with the outside, the buffer area is separated from the drying area through the partition plate to avoid the influence on the drying area, and the drying treatment procedure of the drying area is ensured; when the transportation equipment needs to enter and exit the drying area, the partition plate is opened, and the transportation equipment can smoothly and continuously move in the drying bin; because the work of drying region is incessant, guarantee that the material on the haulage equipment can incessant carry out continuous drying process, improved the utilization ratio of equipment, increased the output of freeze-dried product, inside framework is simple, and the maintenance of being convenient for is operated reliably.

Example two:

a continuous lyophilization process based on the lyophilization system of example one, comprising the steps of:

s1, taking out a tray filled with frozen materials from a freezing area, putting the tray on a transportation device 3 at a loading station, and enabling the transportation device 3 to enter a buffer area 12 at the input end of a drying bin along a conveying rail 2 and then enter a drying area 13;

s2, when the time of the transportation equipment 3 in the drying area reaches the set time, the transportation equipment 3 moves towards the buffer area 12 at the output end of the drying bin 1, and the next transportation equipment 3 enters the drying area 13;

s3, repeating the step S2 until the transportation equipment 3 enters a buffer area 12 at the output end of the drying bin 1;

and S4, the transportation equipment 3 enters the unloading area to take down the tray and then returns to the loading station.

In the embodiment, the buffer area comprises a first buffer area at the input end of the drying bin and a second buffer area at the output end of the drying bin; the drying area and the buffer area are matched as follows: when the transportation equipment enters a first buffer area from the outside, adjusting the vacuum degree of the drying area and the first buffer area, opening a partition plate between the first buffer area and the drying area after the vacuum degree is in a certain range, so that the first buffer area is communicated with the drying area, the first transportation equipment enters the drying area, the first transportation equipment moves towards a second buffer area after the first transportation equipment is dried in the drying area for a set time, and the second transportation equipment enters the drying area from the first buffer area to the original position of the first transportation equipment for drying treatment, and so on until the first transportation equipment enters the second buffer area; in the process, the materials entering the drying area firstly cannot be affected by the materials entering the drying area later, the drying progress of the materials is not required to be suspended, the drying area is always in a working state, the materials in the drying area are dried uninterruptedly, the continuity of drying is achieved, and the working efficiency is guaranteed.

In this embodiment, the material to be dried enters the drying zone from the first buffer zone under the action of the transport device while the transport device continuously enters the second buffer zone from the drying zone, so as to realize continuous and uninterrupted drying treatment.

In this embodiment, the second buffer enters into the transportation equipment of the district of unloading, and after the district of unloading unloads, the dry product transportation that the tray was equipped with is packed the vanning toward the packaging line on, and transportation equipment then carries out the loading along delivery track to the loading station, waits to get into in the outside at first buffer after the loading to this transportation equipment obtains recycling.

In this embodiment, the drying area 13 is under vacuum, and the pressure difference between the buffer area 12 and the drying area 13 is controlled within 1000pa before the transportation device 3 enters and exits the drying area 13.

In this embodiment, the pressure in the buffer area is adjusted to atmospheric pressure before the door of the drying chamber is opened. The safety of the working process is ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A continuous lyophilization system, comprising: comprises a freezing area for freezing materials, a loading station for placing a tray filled with the frozen materials into a transportation device (3), a drying bin (1) for drying the materials, a discharging area and a conveying track (2), wherein the conveying track (2) penetrates through the drying bin (1),

drying chamber is including being used for installing drying zone (13) of dry sheet layer (11) and buffer area (12) of locating drying zone (13) both ends, buffer area (12) with be equipped with between drying zone (13) and cut off the baffle between two intervals, haulage equipment (3) can be followed delivery track (2) remove.

2. A continuous lyophilization system according to claim 1, wherein the drying zone (13) comprises a plurality of temperature-controlled zones, each of which is connected to a heating element.

3. A continuous lyophilization system according to claim 2, wherein the temperature in a plurality of said temperature control zones increases in steps in the direction of said discharge zone.

4. A continuous lyophilization system according to any one of claims 1 to 3, characterized in that the drying chamber (1) is connected with the vacuum system (7) through a cold trap (10), and the cold trap (10) is connected with the refrigeration system (6).

5. A continuous lyophilization system according to any one of claims 1 to 3, wherein the transportation device (1) comprises a frame body (111), a pulley assembly (112) connected to the top of the frame body (111), and a driving connection member (113) connected to the bottom of the frame body (111), wherein the frame body (111) is used for placing the tray, the pulley assembly (112) is slidably connected to the conveying track (2), the driving connection member (113) is matched with a driving assembly (4) placed in the drying chamber (1), and the driving assembly (4) is used for driving the transportation device (1) to move along the feeding end to the discharging end of the drying chamber (1).

6. A continuous freeze drying system according to any one of claims 1 to 3, characterized in that the conveying track (2) comprises a first track disposed inside the drying chamber (1) and a second track disposed outside the drying chamber (1) and connecting the output end of the drying chamber (1), the discharge area, the loading station and the input end of the drying chamber (1).

7. A continuous freeze-drying system according to any one of claims 1 to 3, characterized in that a driving assembly (4) is provided in the drying chamber (1), the driving assembly (4) comprises a driving member and a driving wheel sleeved on the driving member, and a driving connecting member (113) engaged with the driving wheel is provided at the bottom of the transportation device (3).

8. A continuous lyophilization system according to claim 7, wherein the drive member comprises a main drive structure (41), a driven structure (42) and a transmission structure (43), the main drive structure (41) and the driven structure (42) are synchronously moved by the transmission structure (43), and the transport device (3) is moved between the drive assemblies (4).

9. A continuous lyophilization process based on the lyophilization system of any one of claims 1 to 8, characterized in that it comprises the following steps:

s1, taking out a tray filled with frozen materials from a freezing area, putting the tray on a transportation device (3) at a loading station, and enabling the transportation device (3) to enter a buffer area (12) at the input end of a drying bin along a conveying rail (2) and then enter a drying area (13);

s2, when the time of the transportation equipment (3) in the drying area reaches a set time, the transportation equipment (3) moves towards a buffer area (12) at the output end of the drying bin (1), and the next transportation equipment (3) enters a drying area (13);

s3, repeating the S2 until the transportation equipment (3) enters a buffer area (12) at the output end of the drying bin (1);

and S4, the transportation equipment (3) enters the unloading area to take down the tray and then returns to the loading station.

10. A continuous lyophilization process according to claim 9, characterized in that the drying zone (13) is under vacuum, and the pressure difference between the buffer zone (12) and the drying zone (13) is within a set range before the transportation device (3) enters and exits the drying zone (13).