CN103123208B - Multifunctional vacuum drying oven and stage drying process thereof - Google Patents
Multifunctional vacuum drying oven and stage drying process thereof Download PDFInfo
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- CN103123208B CN103123208B CN201310076121.XA CN201310076121A CN103123208B CN 103123208 B CN103123208 B CN 103123208B CN 201310076121 A CN201310076121 A CN 201310076121A CN 103123208 B CN103123208 B CN 103123208B
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- 238000001291 vacuum drying Methods 0.000 title claims abstract description 31
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- 230000008676 import Effects 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 13
- 238000007605 air drying Methods 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 9
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Abstract
The invention discloses a multifunctional vacuum drying oven and stage drying process thereof. The multifunctional vacuum drying oven is provided with modularized assemblies and convenient to manufacture, install and maintain. An electromagnetic vibrator is arranged on the multifunctional vacuum drying oven so that the multifunctional vacuum drying oven has the function of vibrating drying, and drying speeds can be improved. The multifunctional vacuum drying oven is provided with a multistage condensation structure, and therefore more than two ingredients needing to be respectively recycled in materials can be respectively recycled. Meanwhile, the materials can have high porosity and a large drying area in the process of material drying due to a baking pan structure of the drying oven, and the drying speeds can be improved. According to the stage drying process of the multifunctional vacuum drying oven, different contents of moisture in the materials is removed by using of drying methods corresponding to the different contents of moisture, and therefore the materials can have comprehensive advantages in drying cost, drying time and drying quality.
Description
Technical field
The present invention relates to a kind of drying equipment and drying process thereof, what be specifically related to is a kind of multifunctional vacuum drying case and stage drying technique thereof.
Background technology
Heated-air drying is a kind of traditional drying mode, is that a kind of convection heat transfer' heat-transfer by convection is dry.In baking oven or drying chamber, be blown into hot blast, hot blast is through body surface, and moisture is evaporated directly to be entered air afterwards and be pulled away, and this drying mode speed is fast, small investment, but the thermal efficiency is low.
Vacuum drying is a kind of with conduction or the drying of radiant heat transfer, and its drying mode is various, searches to the bottom and can be divided into by boiling point with by melting point two kinds.A kind of mode is by boiling point drying (being referred to as again general vacuum drying), and in its dry run, the vaporization of liquid moisture has evaporation and boiling two kinds of modes.The vaporization rate of water when seething with excitement is more faster than the vaporization rate when evaporating, and moisture evaporation becomes steam and can carry out at any temperature.Moisture boiling becomes steam, can only carry out at a certain temperature, but in time reducing pressure, the boiling point of water also reduces.Such as, under 19 .6kPa air pressure, the boiling point of water can drop to 60 ° of C.Another mode is by melting point drying (being referred to as vacuum freeze drying again), in its dry run first just wet stock (or solution) at a lower temperature (-10--50 DEG C) be frozen into solid-state, then under high vacuum (0.1 ~ 130Pa), directly distil wherein solid-state moisture the dry run removed for gaseous state, also claims lyophilization.
Based on above-mentioned principle, vacuum drying has following advantage: time under low pressure dry, oxygen content is low, can prevent dried material oxidation deterioration, can dry inflammable and explosive dangerous material; The moisture in material can be made at low temperatures to vaporize, be easy to dry heat sensitive material; Utilize attached condensing plant can reclaim valuable and useful composition in dried material; Vacuum freeze drying, except having above-mentioned advantage, also has the function keeping product initial appearance and color.Therefore, along with growth in the living standard, the application of vacuum dryer is increasingly extensive.
But be applied to vacuum drying equipment at present and drying process also has many defects, such as, drying box housing is global design, for large-scale drying box, manufacture, transport, install all very inconvenient; Drying box internal heat exchange parts (as heating plate or heat(ing) coil) are not convenient to the parts (such as castor) of movement and are integrated (being such as welded as a whole) with drying box housing design, when heat-exchanging part (as heating plate or heat(ing) coil) occur that seepage needs repairing, clear up time, because service clearance is little, it is very inconvenient to operate; Drying box internal heat transfer parts many employings coil pipe or flat board, coil pipe area of dissipation and contact area little, the thermal efficiency is low, and dull and stereotyped contact area is large, heat transfer evenly but cost is high and hinder the gaseous exchange between each layer; Drip pan is the flat-bottom structure of thin plate punching compacting, and radiated surface is amassed little and punching and easily covered by material, then affects the heating of material and the spilling of water vapour; Condenser is single step arrangement, has two or more composition to need condensation respectively, cannot process in material; Whole dry run, material remains static, and drying efficiency is low; Various moisture in material are all removed by vacuum drying mode, and drying cost is large.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides modular multi-function drying equipment and stage drying technique thereof, it possesses dynamic dry run, and drying efficiency is high, bactericidal effect is obvious, and cost is low, the drying process that dry products mouthfeel is good.
For achieving the above object, a kind of multifunctional vacuum drying case, comprise: Qianmen, casing, back door, heat-conducting medium pipeline, heat-conducting medium pipeline support, drip pan, drip pan support, heat-conducting medium import, heat-conducting medium exports, vacuum pumping opening, condensate component, blower fan, airflow line, airflow line valve, gas-flow deflector, change air port, cryogenic media coil pipe, case body sealing device, the import of cryogenic media coil pipe, cryogenic media coil outlets, hinge, locking device, metal bellow, temperature detection device, humidity sniffer and electric control cabinet, described vacuum pumping opening is connected with vavuum pump by condensate component, described heat-conducting medium import is arranged on the both sides, bottom of casing, heat-conducting medium outlet is arranged on the both sides, top of casing, and the top of heat-conducting medium pipeline is exported with heat-conducting medium be connected by several metal bellow, the bottom of heat-conducting medium pipeline is connected with heat-conducting medium import by several metal bellows, described heat-conducting medium import is connected with external heat source respectively with heat-conducting medium outlet, and the overall circulation line forming sealing, described blower fan is communicated with box house by airflow line, airflow line valve, gas-flow deflector, forms the airflow circulating system closed, described cryogenic media coil pipe is connected with low-temperature receiver by the import of cryogenic media coil pipe, cryogenic media coil outlets, forms the circulation line of sealing, the bottom of described casing, the below of drip pan support is provided with hertz oscilltor, described hertz oscilltor through bottom half steel plate to the slight vibration of drip pan support transmission, instead of drive whole casing to vibrate, this vibration makes the material in drip pan mutually overstock, stretch, roll, and accelerates air velocity afterwards and increases drying area, can certainly install other devices such as pneumatic hammer at bottom half, as preferably, select can adjusting amplitude, frequency, exciting force hertz oscilltor, the bottom of described drip pan is provided with guiding gutter, and the interior surface of drip pan is provided with projection, and drip pan is metal material, and its object mainly improves heating surface area and the air gap of material, improves rate of drying and the thermal efficiency.
When described airflow line valve closing and front/rear door and casing are locked, casing can bear corresponding vacuum, if now allow cyclic high-temperature medium in heat-conducting medium pipeline, and vavuum pump leads to vacuum pumping hole bleeds, then this casing has vacuum drying function.
Described blower fan is communicated with box house by airflow line, airflow line valve, gas-flow deflector, form the airflow circulating system closed, when this air-flow is in recurrent state, cryogenic media if flowed in heat-conducting medium coil pipe in high-temperature medium, cryogenic media pipeline is recovered, vavuum pump quits work, then this casing has the function of heated-air drying.
The position of described cryogenic media coil pipe is between the medial surface and deflector of casing, cryogenic media can elect freon, liquefied ammonia as, glycol water etc., when the thermal medium in thermal medium coil pipe is retracted, when being connected with cryogenic media in cryogenic media coil pipe, once Air Dried System is opened, have low-temperature airflow and be blown in case, then this casing has the function of frozen materials.
As a further improvement on the present invention, describedly state the heat-conducting medium pipeline pole bracket that comprises in heat-conducting medium pipeline support and heat-conducting medium pipeline up-right support is seamless tubular goods, heat-conducting medium pipeline pole bracket closed at both ends, partially perforation, and be connected with heat-conducting medium pipeline, simultaneously heat-conducting medium pipeline up-right support closed at both ends and partially perforation, and be connected with heat-conducting medium pipeline pole bracket and metal bellow tube connector; Described heat-conducting medium pipeline to be connected with metal bellow by the heat-conducting medium pipeline pole bracket in heat-conducting medium pipeline support, heat-conducting medium pipeline up-right support, metal bellow tube connector and to export with heat-conducting medium import, heat-conducting medium and thermal source forms the circulation line sealed; Which save material and space, and the pipe that heat-conducting medium pipeline uses is finned tube, fin makes the heat transfer area of drip pan or swept area increase considerably, and does not affect again the flowing of gas simultaneously.
As a further improvement on the present invention, in described airflow circulating system, airflow line is branched off into the side that multiple air flows pipeline is evenly distributed in casing, air flow guiding plate is installed between air flows pipeline opening and heat-conducting medium pipeline support, gas-flow deflector has some horizontal grooves, the horizontal level of horizontal groove between heat-conducting medium pipeline support two-layer between.
As a further improvement on the present invention, described heat-conducting medium pipeline support and drip pan support are all with castor, after the metal bellow playing connection function between importing and exporting at heat-conducting medium pipeline and heat-conducting medium is disassembled, heat-conducting medium pipeline support can shift out from casing.
As a further improvement on the present invention, described condensate component is multistage-combination, and every grade has independently condenser and independently refrigeration machine, has condensate liquid in condenser, condensate liquid circulates between condenser and refrigeration machine, and can make like this has different temperature in condenser at different levels; When working vacuum degree is at 100pa and when needing the condensation temperature of two kinds of different materials under this vacuum reclaimed to be respectively-15 DEG C and-20 DEG C in material, as long as it is just passable to regulate every grade of condenser to arrive corresponding temperature range from high to low successively.
As a further improvement on the present invention, described casing adopts modular construction, and the outside of the front/rear end of each casing is equipped with case body sealing device, hinge and locking device, described Qianmen and back door are respectively arranged with the hinge arrangement and locking mechanism that are used in combination with the hinge on casing and locking device, when two modular cabinet series connection, change the structure of the locking device at first casing rear portion and implement locking effect with the locking device of second casing front portion, the hinge means at first casing rear portion and the hinge means of second casing front portion can be saved simultaneously, when three modular cabinet series connection, change the structure of the locking device at first casing and the second casing rear portion and locking effect implemented by the locking device of respectively with the second casing and the 3rd casing front portion, the hinge means of all hinge means of the hinge means at first casing rear portion, second casing and the 3rd casing front portion can be saved simultaneously, when more casing series connection by that analogy.
The drying mode using it corresponding to make moisture different in material is removed, material is made to have comprehensive advantage on drying cost, drying time, dry mass, we invent a kind of stage drying technique being carried out dry fruit and vegetable tablet (or fourth) by above-mentioned drying equipment, comprise the following steps:
Step 1: use the method for heated-air drying by the moisture preliminarily dried of fruit and vegetable tablet (or fourth) to 40% ~ 70%, the temperature range of hot blast is 50 DEG C ~ 90 DEG C; This step Main Function sloughs a part of free water under keeping the substantially constant prerequisite of the volume color of fruit and vegetable tablet (or fourth), and strengthen the tissue scaffold structure of material.
Step 2: the fruit and vegetable tablet (or fourth) step 1 obtained is chilled to-15 DEG C ~-35 DEG C in 0.5h ~ 4h; This step is the cryodesiccated freezing link of conventional vacuum, because a part of Free water is sloughed, so this link freezing link more cryodesiccated than conventional vacuum is saved time and energy consumption.
Step 3: fruit and vegetable tablet (or fourth) method of vacuum freeze drying step 2 obtained makes the moisture of material be dried to 2% ~ 5% further, in this step, temperature of charge control range is-35 DEG C ~ 60 DEG C, the control range of Absolute truth reciprocal of duty cycle is 1 Pa ~ 150Pa, because a part of Free water of fruit and vegetable tablet (or fourth) removes in step 1, so time of needing of this dry run and energy consumption are lower than the vacuum freeze drying of routine; Because fruit and vegetable tablet (or fourth) skeleton structure obtains relative stablizing in step 1, rush down and atrophy so not easily collapse in the vacuum freeze drying of this step.
As a further improvement on the present invention, before described step 1, fruit and vegetable tablet (or fourth) by with blanching or by mass concentration be 0.1% ~ 0.2% the method for VC aqueous solution soaking carry out protecting look.
The invention has the beneficial effects as follows: this equipment has the function of heated-air drying, vacuum drying, quick-frozen material simultaneously; This equipment has modularization critical piece, manufactures, installation, maintenance is more convenient; This equipment has the function of vibration drying, can improve rate of drying; This equipment has multi-stage condensing structure, can the two or more composition needing to reclaim respectively in recovered material respectively; The drip pan structure of this equipment makes material in drying, have higher porosity and drying area, can improve rate of drying; Stage drying technique involved in the present invention, the drying mode that moisture different in material can be made to use it corresponding is removed, and makes material have comprehensive advantage on drying cost, drying time, dry mass.
Accompanying drawing explanation
Fig. 1 is stereogram of the present invention, and wherein Qianmen is open mode;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the upward view of Fig. 1;
Fig. 4 is the detail view of heat-conducting medium pipeline support and heat-conducting medium pipeline in Fig. 1;
Fig. 5 is the structure chart of drip pan in the present invention.
Wherein: 1, Qianmen, 2, casing, 3, back door, 4, heat-conducting medium pipeline, 5, heat-conducting medium pipeline support, 6, drip pan, 7, drip pan support, 8, heat-conducting medium import, 9, heat-conducting medium exports, 10, vacuum pumping opening, 11, condensate component, 12, blower fan, 13, airflow line, 14, airflow line valve, 15, gas-flow deflector, 16, change air port, 17, cryogenic media coil pipe, 18, hertz oscilltor, 19, case body sealing device, 20, the import of cryogenic media coil pipe, 21, cryogenic media coil outlets, 22, hinge, 23, locking device, 24, metal bellow, 25, heat-conducting medium pipeline pole bracket, 26, heat-conducting medium pipeline up-right support, 27, metal bellow tube connector.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be described.
As shown in Figures 1 to 5, a kind of multifunctional vacuum drying case of the present invention, comprise: Qianmen 1, casing 2, back door 3, heat-conducting medium pipeline 4, heat-conducting medium pipeline support 5, drip pan 6, drip pan support 7, heat-conducting medium import 8, heat-conducting medium outlet 9, vacuum pumping opening 10, condensate component 11, blower fan 12, airflow line 13, airflow line valve 14, gas-flow deflector 15, change air port 16, cryogenic media coil pipe 17, case body sealing device 19, cryogenic media coil pipe import 20, cryogenic media coil outlets 21, hinge 22, locking device 23, metal bellow 24, temperature detection device, humidity sniffer and electric control cabinet, described vacuum pumping opening 10 is connected with vavuum pump by condensate component 11, described heat-conducting medium import 8 is arranged on the both sides, bottom of casing 2, heat-conducting medium outlet 9 is arranged on the both sides, top of casing 2, and the top of heat-conducting medium pipeline 4 is exported 9 with heat-conducting medium be connected by several metal bellow 24, the bottom of heat-conducting medium pipeline 4 is connected with heat-conducting medium import 8 by several metal bellows 24, described heat-conducting medium import 8 is connected with external heat source respectively with heat-conducting medium outlet 9, and the overall circulation line forming sealing, described blower fan 12 is communicated with casing 2 inside by airflow line 13, airflow line valve 14, gas-flow deflector 15, forms the airflow circulating system closed, described cryogenic media coil pipe 17 is connected with low-temperature receiver by cryogenic media coil pipe import 20, cryogenic media coil outlets 21, forms the circulation line of sealing, the bottom of described casing 2, the below of drip pan support 7 is provided with hertz oscilltor 18, described hertz oscilltor 18 through steel plate bottom casing 2 to the slight vibration of drip pan support 7 transmission, instead of drive whole casing 2 to vibrate, this vibration makes the material in drip pan 6 mutually overstock, stretch, roll, afterwards accelerate air velocity and increase drying area, bottom casing 2, other devices such as pneumatic hammer can certainly be installed, as preferably, select can adjusting amplitude, frequency, exciting force hertz oscilltor, the bottom of described drip pan 6 is provided with guiding gutter, and the interior surface of drip pan 6 is provided with projection, and drip pan 6 is metal material, and its object mainly improves heating surface area and the air gap of material, improves rate of drying and the thermal efficiency.
Described airflow line valve 14 is closed and front/rear door and casing 2 are locked time, casing 2 can bear corresponding vacuum, if now allow cyclic high-temperature medium in heat-conducting medium pipeline 4, and vavuum pump leads to vacuum pumping hole bleeds, then this casing 2 has vacuum drying function.
Described blower fan 12 is communicated with casing 2 inside by airflow line 13, airflow line valve 14, gas-flow deflector 15, form the airflow circulating system closed, when this air-flow is in recurrent state, cryogenic media if flowed in heat-conducting medium coil pipe in high-temperature medium, cryogenic media pipeline is recovered, vavuum pump quits work, then this casing 2 has the function of heated-air drying.
The position of described cryogenic media coil pipe is between the medial surface and deflector of casing 2, cryogenic media can elect freon, liquefied ammonia as, glycol water etc., when the thermal medium in thermal medium coil pipe is retracted, when being connected with cryogenic media in cryogenic media coil pipe, once Air Dried System is opened, have low-temperature airflow and be blown in case, then this casing has the function of frozen materials
The heat-conducting medium pipeline pole bracket 25 comprised in described heat-conducting medium pipeline support 5 and heat-conducting medium pipeline up-right support 26 are seamless tubular goods, heat-conducting medium pipeline pole bracket 25 closed at both ends, partially perforation, and be connected with heat-conducting medium pipeline 4, simultaneously heat-conducting medium pipeline up-right support 26 closed at both ends and partially perforation, and be connected with heat-conducting medium pipeline pole bracket 25 and metal bellow tube connector 27; Described heat-conducting medium pipeline 4 be connected with metal bellow 24 by the heat-conducting medium pipeline pole bracket 25 in heat-conducting medium pipeline support 5, heat-conducting medium pipeline up-right support 26, metal bellow tube connector 27 and export with heat-conducting medium import 8, heat-conducting medium 9 and thermal source form the circulation line sealed, which save material and space, and the pipe that heat-conducting medium pipeline 4 uses is finned tube, fin makes the heat transfer area of drip pan 6 or swept area increase considerably, and does not affect again the flowing of gas simultaneously.
In described airflow circulating system, airflow line 13 is branched off into the side that multiple air flows pipeline is evenly distributed in casing 2, gas-flow deflector 15 is installed between air flows pipeline opening and heat-conducting medium pipeline support 5, gas-flow deflector 15 has some horizontal grooves, the horizontal level of horizontal groove between heat-conducting medium pipeline support 5 two-layer between.
Described heat-conducting medium pipeline support 5 and drip pan support 7 are all with castor, and after the metal bellow 24 playing connection function between heat-conducting medium pipeline 4 and heat-conducting medium import and export 8,9 is disassembled, heat-conducting medium pipeline support 5 can shift out from casing 2.
Described condensate component 11 is multistage-combination, and every grade has independently condenser and independently refrigeration machine, has condensate liquid in condenser, and condensate liquid circulates between condenser and refrigeration machine, can make there is different temperature in condenser at different levels like this; When working vacuum degree is at 100pa and when needing the condensation temperature of two kinds of different materials under this vacuum reclaimed to be respectively-15 DEG C and-20 DEG C in material, as long as it is just passable to regulate every grade of condenser to arrive corresponding temperature range from high to low successively.
Described casing 2 adopts modular construction, and the outside of the front/rear end of each casing 2 is equipped with case body sealing device 19, hinge 22 and locking device 23, described Qianmen 1 and back door 3 are respectively arranged with the hinge arrangement and locking mechanism that are used in combination with the hinge 22 on casing 2 and locking device 23, when two modular cabinet series connection, change the structure of the locking device at first casing rear portion and implement locking effect with the locking device of second casing front portion, the hinge means at first casing rear portion and the hinge means of second casing front portion can be saved simultaneously; When three modular cabinet series connection, change the structure of the locking device at first casing and the second casing rear portion and locking effect implemented by the locking device of respectively with the second casing and the 3rd casing front portion, the hinge means of all hinge means of the hinge means at first casing rear portion, second casing and the 3rd casing front portion can be saved simultaneously; When more casing series connection by that analogy.
The drying mode using it corresponding to make moisture different in material is removed, material is made to have comprehensive advantage on drying cost, drying time, dry mass, we invent a kind of stage drying technique being carried out dry fruit and vegetable tablet (or fourth) by above-mentioned multi-functional drying box, and its concrete drying steps is as described below:
embodiment one:
Carried out a stage drying technique for dry fruits and vegetables by above-mentioned multifunctional vacuum drying case, comprise the following steps:
Step 1: use the method for heated-air drying by the moisture preliminarily dried of fruit and vegetable tablet (or fourth) to 40%, the temperature range of hot blast is 50 DEG C; This step Main Function sloughs a part of free water under keeping the substantially constant prerequisite of the volume color of fruit and vegetable tablet (or fourth), and strengthen the tissue scaffold structure of material.
Step 2: the fruit and vegetable tablet (or fourth) step 1 obtained is chilled to-15 DEG C in 0.5h; This step is the cryodesiccated freezing link of conventional vacuum, because a part of Free water is sloughed, so this link freezing link more cryodesiccated than conventional vacuum is saved time and energy consumption.
Step 3: fruit and vegetable tablet (or fourth) method of vacuum freeze drying step 2 obtained makes the moisture of material be dried to 2% further, in this step, temperature of charge control range is-35 DEG C, the control range of Absolute truth reciprocal of duty cycle is 1 Pa, because a part of Free water of fruit and vegetable tablet (or fourth) removes in step 1, so time of needing of this dry run and energy consumption are lower than the vacuum freeze drying of routine; Because fruit and vegetable tablet (or fourth) skeleton structure obtains relative stablizing in step 1, rush down and atrophy so not easily collapse in the vacuum freeze drying of this step.
As a further improvement on the present invention, before described step 1, fruit and vegetable tablet (or fourth) by with blanching or by mass concentration be 0.1% the method for VC aqueous solution soaking carry out protecting look.
embodiment two:
Carried out a stage drying technique for dry fruits and vegetables by above-mentioned multifunctional vacuum drying case, comprise the following steps:
Step 1: use the method for heated-air drying by the moisture preliminarily dried of fruit and vegetable tablet (or fourth) to 70%, the temperature range of hot blast is 90 DEG C; This step Main Function sloughs a part of free water under keeping the substantially constant prerequisite of the volume color of fruit and vegetable tablet (or fourth), and strengthen the tissue scaffold structure of material.
Step 2: the fruit and vegetable tablet (or fourth) step 1 obtained is chilled to-35 DEG C in 4h; This step is the cryodesiccated freezing link of conventional vacuum, because a part of Free water is sloughed, so this link freezing link more cryodesiccated than conventional vacuum is saved time and energy consumption.
Step 3: fruit and vegetable tablet (or fourth) method of vacuum freeze drying step 2 obtained makes the moisture of material be dried to 5% further, in this step, temperature of charge control range is 60 DEG C, the control range of Absolute truth reciprocal of duty cycle is 150Pa, because a part of Free water of fruit and vegetable tablet (or fourth) removes in step 1, so time of needing of this dry run and energy consumption are lower than the vacuum freeze drying of routine; Because fruit and vegetable tablet (or fourth) skeleton structure obtains relative stablizing in step 1, rush down and atrophy so not easily collapse in the vacuum freeze drying of this step.
As a further improvement on the present invention, before described step 1, fruit and vegetable tablet (or fourth) by with blanching or by mass concentration be 0.2% the method for VC aqueous solution soaking carry out protecting look.
embodiment three:
Carried out a stage drying technique for dry fruits and vegetables by above-mentioned multifunctional vacuum drying case, comprise the following steps:
Step 1: use the method for heated-air drying by the moisture preliminarily dried of fruit and vegetable tablet (or fourth) to 60%, the temperature range of hot blast is 70 DEG C; This step Main Function sloughs a part of free water under keeping the substantially constant prerequisite of the volume color of fruit and vegetable tablet (or fourth), and strengthen the tissue scaffold structure of material.
Step 2: the fruit and vegetable tablet (or fourth) step 1 obtained is chilled to-25 DEG C in 2.5h; This step is the cryodesiccated freezing link of conventional vacuum, because a part of Free water is sloughed, so this link freezing link more cryodesiccated than conventional vacuum is saved time and energy consumption.
Step 3: fruit and vegetable tablet (or fourth) method of vacuum freeze drying step 2 obtained makes the moisture of material be dried to 3% further, in this step, temperature of charge control range is 50 DEG C, the control range of Absolute truth reciprocal of duty cycle is 80Pa, because a part of Free water of fruit and vegetable tablet (or fourth) removes in step 1, so time of needing of this dry run and energy consumption are lower than the vacuum freeze drying of routine; Because fruit and vegetable tablet (or fourth) skeleton structure obtains relative stablizing in step 1, rush down and atrophy so not easily collapse in the vacuum freeze drying of this step.
As a further improvement on the present invention, before described step 1, fruit and vegetable tablet (or fourth) by with blanching or by mass concentration be 0.15% the method for VC aqueous solution soaking carry out protecting look.
Multifunctional vacuum drying case in the present invention has the function of heated-air drying, vacuum drying, quick-frozen material simultaneously; This equipment has modularization critical piece, manufactures, installation, maintenance is more convenient; This equipment has the function of vibration drying, can improve rate of drying; This equipment has multi-stage condensing structure, can the two or more composition needing to reclaim respectively in recovered material respectively; The drip pan structure of this equipment makes material in drying, have higher porosity and drying area, can improve rate of drying; Stage drying technique involved in the present invention, the drying mode that moisture different in material can be made to use it corresponding is removed, and makes material have comprehensive advantage on drying cost, drying time, dry mass.
Claims (7)
1. a multifunctional vacuum drying case, comprise: Qianmen (1), casing (2), back door (3), heat-conducting medium pipeline (4), heat-conducting medium pipeline support (5), drip pan (6), drip pan support (7), heat-conducting medium import (8), heat-conducting medium outlet (9), vacuum pumping opening (10), condensate component (11), blower fan (12), airflow line (13), airflow line valve (14), gas-flow deflector (15), change air port (16), cryogenic media coil pipe (17), case body sealing device (19), cryogenic media coil pipe import (20), cryogenic media coil outlets (21), hinge (22), locking device (23), metal bellow (24), temperature detection device, humidity sniffer and electric control cabinet, it is characterized in that: described vacuum pumping opening (10) is connected with vavuum pump by condensate component (11), described heat-conducting medium import (8) is arranged on the both sides, bottom of casing (2), heat-conducting medium outlet (9) is arranged on the both sides, top of casing (2), and the top of heat-conducting medium pipeline (4) is exported (9) be connected by several metal bellow (24) with heat-conducting medium, the bottom of heat-conducting medium pipeline (4) is connected with heat-conducting medium import (8) by several metal bellows (24), described heat-conducting medium import (8) is connected with external heat source respectively with heat-conducting medium outlet (9), and the overall circulation line forming sealing, described blower fan (12) is communicated with casing (2) inside by airflow line (13), airflow line valve (14), gas-flow deflector (15), forms the airflow circulating system closed, described cryogenic media coil pipe (17) is connected with low-temperature receiver by cryogenic media coil pipe import (20), cryogenic media coil outlets (21), forms the circulation line of sealing, the bottom of described casing (2), the below of drip pan support (7) is provided with hertz oscilltor (18), and the bottom of described drip pan (6) is provided with guiding gutter, and the interior surface of drip pan (6) is provided with projection, the heat-conducting medium pipeline pole bracket (25) comprised in described heat-conducting medium pipeline support (5) and heat-conducting medium pipeline up-right support (26) are seamless tubular goods, heat-conducting medium pipeline pole bracket (25) closed at both ends, partially perforation, and be connected with heat-conducting medium pipeline (4), simultaneously heat-conducting medium pipeline up-right support (26) closed at both ends and partially perforation, and be connected with heat-conducting medium pipeline pole bracket (25) and metal bellow tube connector (27), described heat-conducting medium pipeline (4) is connected by the heat-conducting medium pipeline pole bracket (25) in heat-conducting medium pipeline support (5), heat-conducting medium pipeline up-right support (26), metal bellow tube connector (27) and metal bellow (24) and exports (9) with heat-conducting medium import (8), heat-conducting medium and thermal source forms the circulation line sealed.
2. multifunctional vacuum drying case according to claim 1, it is characterized in that: in described airflow circulating system, airflow line (13) is branched off into the side that multiple air flows pipeline is evenly distributed in casing (2), gas-flow deflector (15) is installed between air flows pipeline opening and heat-conducting medium pipeline support (5), gas-flow deflector (15) has some horizontal grooves, the horizontal level of horizontal groove between heat-conducting medium pipeline support (5) two-layer between.
3. multifunctional vacuum drying case according to claim 2, is characterized in that: described heat-conducting medium pipeline support (5) and drip pan support (7) are all with castor, and the pipe that described heat-conducting medium pipeline (4) uses is finned tube.
4. multifunctional vacuum drying case according to claim 1, it is characterized in that: described condensate component (11) is multistage-combination, every grade has independently condenser and independently refrigeration machine, has condensate liquid in condenser, and condensate liquid circulates between condenser and refrigeration machine.
5. multifunctional vacuum drying case according to claim 1, it is characterized in that: the outside of the front/rear end of described casing (2) is equipped with case body sealing device (19), hinge (22) and locking device (23), described Qianmen (1) and back door (3) are respectively arranged with the hinge arrangement and locking mechanism that are used in combination with the hinge (22) on casing (2) and locking device (23).
6. the multifunctional vacuum drying case according to any one of claim 1-5 carrys out the stage drying technique of dry fruits and vegetables, it is characterized in that: comprise following steps:
Step 1: use the method for heated-air drying by the moisture preliminarily dried of material to 40% ~ 70%, the temperature range of hot blast is 50 DEG C ~ 90 DEG C;
Step 2: material step 1 obtained is chilled to-40 DEG C ~-15 DEG C;
Step 3: the vacuum drying method of material step 2 obtained makes the moisture of material be dried to 2% ~ 5% further, in this step, temperature of charge control range is-40 DEG C ~ 60 DEG C, and the control range of Absolute truth reciprocal of duty cycle is 1 Pa ~ 150Pa.
7. stage drying technique according to claim 6, is characterized in that: before described step 1, and material is by carrying out protecting look with blanching or by the method for the VC aqueous solution soaking for 0.1% ~ 0.2%.
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| CN105280958A (en) * | 2015-10-20 | 2016-01-27 | 四川科能锂电有限公司 | Automatic vacuum drying box for production of lithium ion battery |
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| CN110160323A (en) * | 2019-06-06 | 2019-08-23 | 深圳市时代高科技设备股份有限公司 | Minton dryer and electrifying connection apparatus for Minton dryer |
| CN112536006B (en) * | 2020-12-08 | 2022-05-10 | 萍乡宝海锌营养科技有限公司 | Energy-concerving and environment-protective zinc sulfate apparatus for producing |
| CN112999778B (en) * | 2021-02-07 | 2022-08-16 | 深圳圣融达科技有限公司 | Vacuum-pumping machine |
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| CN114557966B (en) * | 2022-03-09 | 2023-07-04 | 上海方予健康医药科技有限公司 | Method for producing everolimus solid dispersion through vacuum crawler-type oven |
| CN115654845A (en) * | 2022-10-31 | 2023-01-31 | 江苏南理范群装备科技有限公司 | Vacuum dryer and working method thereof |
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