CN211552241U - Vacuum freeze drying and vacuum drying dual-purpose drying equipment - Google Patents
Vacuum freeze drying and vacuum drying dual-purpose drying equipment Download PDFInfo
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- CN211552241U CN211552241U CN202021675121.3U CN202021675121U CN211552241U CN 211552241 U CN211552241 U CN 211552241U CN 202021675121 U CN202021675121 U CN 202021675121U CN 211552241 U CN211552241 U CN 211552241U
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Abstract
A vacuum freeze drying and vacuum drying dual-purpose drying device belongs to the technical field of vacuum freeze drying and vacuum drying in the field of deep processing of agricultural products. The trap is arranged below the heating plate, and the vacuumizing ports on two sides of the trap are respectively connected with the vacuumizing pipe and then combined with the vacuumizing main pipe to be connected with the main vacuumizing system and the vacuum maintaining system. The drying chamber is provided with two vacuum gauges with different measuring ranges. The main pumping system comprises a main pumping system valve, a main roots pump and two backing-stage rotary vane vacuum pumps. The vacuum maintaining system comprises a vacuum maintaining system valve, a second-stage roots pump, a first-stage roots pump and a front-stage water-ring vacuum pump. Each vacuumizing tube is provided with a regulating valve. The vacuumizing main pipe is provided with two vacuum regulating valves with different drift diameters. In order to research a new process for processing food and agricultural products, which is beneficial to improving the yield and saving the energy consumption, a set of equipment is used for realizing two functions of vacuum freeze drying and vacuum drying, so that the investment is saved and the utilization rate of the equipment is improved.
Description
Technical Field
The utility model belongs to the technical field of agricultural product deep-processing field vacuum freeze drying and vacuum drying, in particular to vacuum freeze drying and vacuum drying dual-purpose drying equipment.
Background
The food vacuum freeze drying and the food vacuum drying both belong to the field of food and agricultural product deep processing, and two sets of equipment are used for the current food vacuum freeze drying and the food vacuum drying.
The vacuum freeze drying technology for food is an international new advanced food drying technology which freezes the moisture in food into ice crystal according to the equilibrium relation of solid, liquid and gas phases of the moisture, and gives out latent heat of sublimation under the conditions of low temperature and low pressure, so that the moisture in food is directly converted into water vapor from the ice crystal and discharged, thereby dehydrating the food.
The food vacuum drying technology is a food drying technology which dehydrates food by utilizing the boiling point reduction of water under vacuum condition, giving latent heat of vaporization to the moisture in the food under the conditions of low temperature and low pressure, and converting the moisture in the food into water vapor to be discharged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dual-purpose drying equipment of vacuum freeze drying and vacuum drying, research food and agricultural product processing new technology use one set of equipment to realize two kinds of functions of vacuum freeze drying and vacuum drying.
The technical scheme is as follows:
a dual-purpose drying equipment for vacuum freeze drying and vacuum drying comprises a heating system and two groups of heating plates
Is arranged in the drying bin. A catcher is arranged below the two groups of heating plates.
The technical key points are as follows:
the two sides of the trap are respectively provided with a vacuumizing port which is respectively connected with a vacuumizing pipe and then is combined with a vacuumizing main pipe, and the vacuumizing main pipe is connected with an inlet of a main vacuumizing system and an inlet of a vacuum maintaining system.
The drying bin is provided with a first vacuum gauge and a second vacuum gauge.
The main pumping system comprises a main pumping system valve, a main roots pump and two backing-stage rotary vane vacuum pumps.
The outlet pipeline of the main Roots pump is connected with the inlets of the two preceding-stage rotary vane vacuum pumps.
And a main pumping system valve is arranged at the inlet of the main roots pump and serves as the inlet of the main pumping system.
The vacuum maintaining system comprises a vacuum maintaining system valve, a second-stage roots pump, a first-stage roots pump and a front-stage water-ring vacuum pump.
The outlet pipeline of the second-stage roots pump is connected with the inlet of the first-stage roots pump, and the outlet pipeline of the first-stage roots pump is connected with the inlet of the water-ring vacuum pump.
The inlet of the two-stage roots pump is provided with a vacuum maintaining system valve as the inlet of the vacuum maintaining system.
Each vacuumizing tube is provided with a regulating valve.
The vacuumizing main pipe is provided with a first vacuum regulating valve and a second vacuum regulating valve.
The drift diameter of the first vacuum regulating valve is smaller than that of the second vacuum regulating valve.
The first vacuum gauge range is less than the second vacuum gauge range.
The advantages are that:
in order to research a new process for processing food and agricultural products, which is beneficial to improving the yield and saving the energy consumption, a set of equipment is used for realizing two functions of vacuum freeze drying and vacuum drying, so that the investment is saved and the utilization rate of the equipment is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The device comprises a catcher 1, a liquid supply valve group 2, a heating plate 3, an adjusting valve 4, a drying bin 5, a first vacuum gauge 6, a vacuumizing pipe 7, a breaking vacuum valve 8, a hot water circulating pump 9, a cooling tower 10, a first three-way adjusting valve 11, a second three-way adjusting valve 12, a second vacuum gauge 13, a third port pipeline 14 of the second three-way adjusting valve, a cooling heat exchanger 15, a cold water circulating pump 16, a second vacuum adjusting valve 17, a vacuumizing main pipe 18, a vacuum maintaining system 19, a heating circulating pump 20, a heating heat exchanger 21, a heating tank 22, a main pumping system 23, a main pumping system valve 24, a main pumping system 25, a rotary vane roots vacuum pump 26, a vacuum maintaining system valve 27, a second-stage roots pump 28, a first-stage roots pump 29, a water ring vacuum pump 30, a first vacuum adjusting valve 31, an ice melting tank.
Detailed Description
A drying device for vacuum freeze drying and vacuum drying.
The heating system comprises a heating tank 22, a heating heat exchanger 21, a warming circulating pump 20, a cooling heat exchanger 15, a cooling tower 10, a cold water circulating pump 16 and a hot water circulating pump 9.
The heating tank 22 is supplied with heat by the heating heat exchanger 21.
The heating heat exchanger 21 is a steam heat exchanger and has a steam inlet and a steam outlet.
The first water inlet pipeline on the right side of the heating tank 22 is connected with the water outlet of the heating heat exchanger 21.
A second water inlet below the heating tank 22 is connected with a water inlet of a heating heat exchanger 21 through a warming circulating pump 20. The outlet of the warming circulating pump 20 is connected with the water inlet of the heating heat exchanger 21.
The left water outlet pipeline of the heating tank 22 is connected with a first port (a right port in the figure) of the first three-way regulating valve 11.
The second port (the left port in the figure) of the first three-way regulating valve 11 is respectively connected with the water inlets of the two groups of heating plates 3 at two sides through pipelines of a hot water circulating pump 9.
The water outlet pipelines of the heating plates 3 at two sides are combined and then connected with a first port (a lower port on the figure) of a second three-way regulating valve 12.
A second port (an upper port in the figure) of the second three-way regulating valve 12 is connected to a third port (a lower port in the figure) of the first three-way regulating valve 11 through a pipeline.
The third port (the right port in the figure) pipeline 14 of the second three-way regulating valve is connected with the point A of the combined water outlet pipelines of the heating plates 3 at the two sides.
The third port pipeline 14 of the second three-way regulating valve passes through a cooling heat exchanger 15.
The cooling heat exchanger 15 is connected with the cooling tower 10 through a cold water circulating pump 16 to form a circulation.
The pipeline between the point A and the position where the water outlets of the heating plates 3 on the two sides are combined is connected to a second water inlet below the connecting heating tank 22.
Two groups of heating plates 3 are arranged in the drying bin 5.
A catcher 1 is arranged below the two groups of heating plates 3 (the catcher 1 is a known technology and is arranged along the left and right directions on the figure).
The liquid supply valve groups 2 on the left side and the right side of the catcher 1 are arranged outside the drying bin 5.
The lower pipelines at the left and right sides of the catcher 1 are respectively connected with the water inlets (the pipelines are provided with valves) corresponding to the ice melting tanks 32 at the outer side of the drying bin 5.
The left side and the right side of the catcher 1 are both provided with a refrigerant outlet and a refrigerant inlet.
The left side and the right side of the catcher 1 are respectively provided with a vacuumizing port which is respectively connected with a vacuumizing pipe 7 and then is combined with a vacuumizing main pipe 18, and the vacuumizing main pipe 18 is connected with an inlet of a main vacuumizing system 23 and an inlet of a vacuum maintaining system 19.
Each vacuum tube 7 is provided with a regulating valve 4.
The main pumping system 23 includes a main pumping system valve 24, a main roots pump 25 and two backing rotary vane vacuum pumps 26.
The outlet pipeline of the main roots pump 25 is connected with the inlets of two backing rotary vane vacuum pumps 26.
The inlet of the main roots pump 25 is provided with a main pumping system valve 24 as an inlet of the main pumping system 23.
The vacuum maintenance system 19 includes a vacuum maintenance system valve 27, a secondary roots pump 28, a primary roots pump 29 and a forward stage water-ring vacuum pump 30.
The outlet pipeline of the second-stage roots pump 28 is connected with the inlet of the first-stage roots pump 29, and the outlet pipeline of the first-stage roots pump 29 is connected with the inlet of the water-ring vacuum pump 30.
The inlet of the secondary roots pump 28 is provided with a vacuum maintenance system valve 27 as an inlet of the vacuum maintenance system 19.
The main vacuum-pumping pipe 18 is provided with a first vacuum regulating valve 31 and a second vacuum regulating valve 17.
The drift diameter of the first vacuum regulating valve 31 is smaller than that of the second vacuum regulating valve 17.
A vacuum breaking valve 8 is arranged on one vacuum-pumping pipe 7.
The drying chamber 5 is provided with a first vacuum gauge 6 and a second vacuum gauge 13.
The range of the first vacuum gauge 6 is smaller than the range of the second vacuum gauge 13.
The ice melting tank 32 is provided with a steam inlet and a steam outlet, the ice melting tank 32 is also provided with an outward pipeline, and the pipeline is provided with an ice melting tank drainage pump 33, a corresponding valve and a pressure sensor.
In order to realize that one set of equipment can respectively carry out vacuum freeze drying and vacuum drying, each system is prepared again according to different process requirements of the two processes.
1. The heating system, the drying chamber 5, the built-in heating plate group 2 and the catcher 1 are partially shared.
2. A heating system: the system is composed of a heating tank 22, a heating circulating pump 20, a heating heat exchanger 21, a hot water circulating pump 9, a cooling heat exchanger 15, a cooling tower 10, a cold water circulating pump 16, two three-way regulating valves (a first three-way regulating valve 11 and a second three-way regulating valve 12), a hot water tank temperature sensor, a heating plate temperature sensor and other equipment pipelines.
A heating system: according to the requirements of two different drying processes, respective drying curves are set, and the respective curves are called to adjust the temperature of the heating plate 3 to realize different processes when different drying is carried out.
3. A vacuum system: is composed of a main pumping system 23 and a vacuum maintaining system 19. The main pumping system 23 has a main roots pump 25 with a large pumping speed and two backing rotary vane vacuum pumps 26. The vacuum maintenance system 19 has a two-stage roots pump 28, a one-stage roots pump 29 and a water-ring vacuum pump 30 in front of it. And a first vacuum regulating valve 31, a second vacuum regulating valve 17, a first vacuum gauge 6, a second vacuum gauge 13 and other vacuum control valves.
The main pumping system 23 is to make the vacuum degree of the drying chamber 5 quickly reach the requirement of the drying process, then the main pumping system 23 stops working (the main pumping system valve 24 is closed), and the vacuum maintaining system 19 continues working. The vacuum maintaining system 19 is used for keeping the vacuum degree of the system stable after the system reaches the working vacuum degree.
According to the different requirements of vacuum freeze drying and vacuum drying on vacuum degree, two vacuum gauges with different measuring ranges and vacuum regulating valves with different drift diameters are prepared.
The vacuum freeze-drying requires a high degree of vacuum, so the vacuum degree is controlled by the first vacuum gauge 6 (0-1333 Pa) with a small high degree of vacuum, the two-stage roots pump 28, the one-stage roots pump 29 and the water ring vacuum pump 30 at the front stage of the vacuum maintaining system 19 all work, and the first vacuum adjusting valve 31 with a small drift diameter is used for vacuum adjustment.
The vacuum degree required by vacuum drying is low, so that the vacuum degree is controlled by a second vacuum gauge 13 (0-10 kilopascal) with low range, a second-stage roots pump 28 and a first-stage roots pump 29 in the vacuum maintaining system 19 do not work, only a water ring vacuum pump 30 works, and the vacuum adjustment uses a second vacuum adjusting valve 17 with large drift diameter.
4. The refrigerating system can be matched with a compressor set with a plurality of parallel machine heads, and the machine heads with different numbers are started according to two drying different refrigerating capacities. The temperature of the catcher 1 is realized by adjusting a liquid supply valve group 2 (comprising a large valve and a small valve) positioned outside a drying bin 5.
During vacuum freeze drying, the working temperature of the catcher 1 is-38 ℃, ice is condensed on the surface of the catcher 1, and the left side and the right side of the catcher 1 need to be alternately melted with ice.
During vacuum drying, the working temperature of the catcher 1 is 0 ℃, water is condensed on the surface of the catcher 1 and flows into the ice melting tank 32 by virtue of the height difference. The trap 1 door is opened to the middle without alternately trapping, and the left side and the right side of the trap 1 work simultaneously.
5. And (4) an ice melting system.
During vacuum freeze drying, steam needs to be introduced into a coil pipe in the trap 1 to keep the water temperature of the ice melting tank 32, so that heat required by the trap 1 for melting ice is provided.
Condensation of water into trap 1 during vacuum drying does not require de-icing, so that no steam is required for the de-icing tank 32.
The catcher 1 is supplied with liquid by a refrigerating system for circulation.
6. And (5) controlling the system.
And a set of PLC is shared, and different control programs are respectively programmed according to different drying process requirements of vacuum freeze drying and vacuum drying. When different drying processes are carried out, a special control program is called to control each system to automatically work.
7. The other auxiliary systems are the same.
Claims (7)
1. A dual-purpose drying device for vacuum freeze drying and vacuum drying comprises a heating system, two groups of heating plates (3) are arranged in a drying bin (5); one trap (1) is established to two sets of hot plate (3) below, its characterized in that:
the two sides of the catcher (1) are respectively provided with a vacuumizing port which is respectively connected with a vacuumizing pipe (7) and then is combined with a vacuumizing main pipe (18), and the vacuumizing main pipe (18) is connected with an inlet of a main vacuumizing system (23) and an inlet of a vacuum maintaining system (19);
the drying bin (5) is provided with a first vacuum gauge (6) and a second vacuum gauge (13).
2. The drying apparatus for both vacuum freeze drying and vacuum drying as claimed in claim 1, wherein:
the main pumping system (23) comprises a main pumping system valve (24), a main roots pump (25) and two backing rotary vane vacuum pumps (26);
the outlet pipeline of the main roots pump (25) is connected with the inlets of the two backing-stage rotary vane vacuum pumps (26);
a main pumping system valve (24) is arranged at the inlet of the main roots pump (25) and is used as the inlet of the main pumping system (23);
the vacuum maintaining system (19) comprises a vacuum maintaining system valve (27), a secondary roots pump (28), a primary roots pump (29) and a front-stage water-ring vacuum pump (30);
an outlet pipeline of the second-stage roots pump (28) is connected with an inlet of the first-stage roots pump (29), and an outlet pipeline of the first-stage roots pump (29) is connected with an inlet of the water-ring vacuum pump (30);
the inlet of the two-stage roots pump (28) is provided with a vacuum maintenance system valve (27) as the inlet of the vacuum maintenance system (19).
3. The drying apparatus for both vacuum freeze drying and vacuum drying as claimed in claim 1, wherein: each vacuumizing tube (7) is provided with a regulating valve (4).
4. The drying apparatus for both vacuum freeze drying and vacuum drying as claimed in claim 1, wherein:
a first vacuum regulating valve (31) and a second vacuum regulating valve (17) are arranged on the vacuumizing main pipe (18);
the drift diameter of the first vacuum regulating valve (31) is smaller than that of the second vacuum regulating valve (17).
5. The drying apparatus for both vacuum freeze drying and vacuum drying as claimed in claim 1, wherein:
the measuring range of the first vacuum gauge (6) is smaller than that of the second vacuum gauge (13).
6. The drying apparatus for both vacuum freeze drying and vacuum drying as claimed in claim 5, wherein:
the range of the first vacuum gauge (6) is 0-1333 Pa, and the range of the second vacuum gauge (13) is 0-10 kilopascal.
7. The drying apparatus for both vacuum freeze drying and vacuum drying as claimed in claim 1, wherein:
the lower pipelines at the two sides of the catcher (1) are connected with the water inlet corresponding to the ice melting tank (32) at the outer side of the drying bin (5); a vacuum breaking valve (8) is arranged on the vacuum-pumping pipe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675121.3U CN211552241U (en) | 2020-08-13 | 2020-08-13 | Vacuum freeze drying and vacuum drying dual-purpose drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675121.3U CN211552241U (en) | 2020-08-13 | 2020-08-13 | Vacuum freeze drying and vacuum drying dual-purpose drying equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211552241U true CN211552241U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021675121.3U Active CN211552241U (en) | 2020-08-13 | 2020-08-13 | Vacuum freeze drying and vacuum drying dual-purpose drying equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211552241U (en) |
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2020
- 2020-08-13 CN CN202021675121.3U patent/CN211552241U/en active Active
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