Crystallized trehalose drying device

Abstract

According to the crystalline trehalose drying device provided by the utility model, the infrared radiation light wave plate is arranged in the drying container, the hot air mechanism is arranged to convey hot air into the drying container, and the air exhaust and pressure reduction device is arranged to perform air exhaust and pressure reduction on the interior of the drying container; therefore, based on the characteristics of high energy utilization rate, high drying speed, large contact surface between hot air drying and a drying medium and good heat conduction effect of infrared radiation drying, reduced-pressure radiation drying, reduced-pressure boiling drying or cooling drying can be carried out on the crystalline trehalose in the drying container, moisture in the crystalline trehalose is fully removed, and the drying efficiency of the crystalline trehalose is improved. And the preparation efficiency of the anhydrous trehalose is obviously improved, so that the yield of the anhydrous trehalose is increased. In addition, an air pressure meter is arranged to obtain the internal air pressure of the drying container, and then the internal air pressure during drying is adjusted; and a first temperature sensor and a second temperature sensor are arranged to obtain the hot air temperature and the internal temperature of the drying container, so that the internal temperature during drying can be adjusted, and the drying efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to trehalose drying technical field especially is involved in a kind of crystalline trehalose drying device. BACKGROUND

[0002] Trehalose, also known as mycose and oridonin, is a non-reducing disaccharide connected by two glucose molecules through α, α-1, 1 glycosidic bond, and its sweetness is only 45% of sucrose, which is widely used in food and medicine fields.

[0003] In actual trehalose preparation process, the crystalline trehalose prepared by concentrating and crystallizing trehalose syrup often needs to be dried to reduce the moisture content of trehalose, and finally obtain anhydrous trehalose which is easy to store and convenient for processing and application in multiple fields. However, the existing anhydrous trehalose drying has long drying time and low efficiency, which is difficult to meet the increasing demand for anhydrous trehalose, therefore, it is necessary to provide a crystalline trehalose drying device to efficiently obtain anhydrous trehalose. SUMMARY

[0004] In view of the technical problem that the existing anhydrous trehalose drying has long drying time and low efficiency, which is difficult to meet the increasing demand for anhydrous trehalose, the utility model provides a crystalline trehalose drying device.

[0005] A crystalline trehalose drying device, comprising a device body; the device body comprises a drying container, a gas extraction and pressure reduction mechanism and a hot air mechanism; the drying container is provided with a feeding port and a gas pressure gauge for detecting the gas pressure in the drying container; the drying container is provided with a stirring mechanism and a first temperature sensor for detecting the temperature in the drying container; the top of the drying container is provided with an infrared radiation light wave plate for radiation drying of crystalline trehalose; the gas extraction and pressure reduction mechanism is in communication with the inside of the drying container for gas extraction and pressure reduction in the drying container; the hot air mechanism comprises a blower, a heater and an air pipe; one end of the heater is connected with the blower, and the other end is in communication with the drying container through the air pipe; the air pipe is provided with a second temperature sensor for detecting the temperature of hot air, and the connection port of the air pipe and the drying container is provided with a heat-resistant air filter membrane; one side of the bottom of the drying container is provided with a discharging port.

[0006] Further, the stirring mechanism comprises a motor arranged on one side of the drying container and a stirring shaft arranged in the drying container; one end of the stirring shaft is fixedly connected with the driving shaft of the motor, and a plurality of stirring blades are staggered arranged on both sides of the stirring shaft.

[0007] Further, the air extraction and pressure reduction mechanism comprises a cyclone separator, an air extraction pipe and an air extraction pump; one end of the cyclone separator is communicated with the drying container through the air extraction pipe, and the other end is connected with the air extraction pump.

[0008] Further, the inner wall of the drying container is provided with a polytetrafluoroethylene anti-sticking coating.

[0009] Further, the air extraction and pressure reduction mechanism comprises a cyclone separator, an air extraction pipe and an air extraction pump; one end of the cyclone separator is communicated with the drying container through the air extraction pipe, and the other end is connected with the air extraction pump.

[0010] Further, the air extraction and pressure reduction mechanism comprises a cyclone separator, an air extraction pipe and an air extraction pump; one end of the cyclone separator is communicated with the drying container through the air extraction pipe, and the other end is connected with the air extraction pump.

[0011] Further, the infrared radiation light wave plate comprises an infrared heating layer, an infrared reflecting layer and a heat insulation layer arranged in sequence.

[0012] Further, the drying container is a horizontally placed cylindrical container.

[0013] Further, the air extraction and pressure reduction mechanism comprises a cyclone separator, an air extraction pipe and an air extraction pump; one end of the cyclone separator is communicated with the drying container through the air extraction pipe, and the other end is connected with the air extraction pump.

[0014] Further, the air extraction and pressure reduction mechanism comprises a cyclone separator, an air extraction pipe and an air extraction pump; one end of the cyclone separator is communicated with the drying container through the air extraction pipe, and the other end is connected with the air extraction pump.

[0015] The beneficial effects of the utility model are as follows: the crystalline trehalose drying device provided by the utility model is characterized in that an infrared radiation light wave plate is arranged in the drying container, a hot air mechanism is arranged to deliver hot air into the drying container, and an air extraction and pressure reduction device is arranged to extract air and reduce pressure in the drying container, so that the crystalline trehalose in the drying container can be dried by pressure reduction radiation, pressure reduction boiling or cooling, the internal moisture of the crystalline trehalose is removed sufficiently, the efficiency of preparing anhydrous trehalose is improved significantly, and the yield of anhydrous trehalose is increased. In addition, the internal air pressure of the drying container is obtained through the air pressure gauge, so that the internal air pressure during drying can be adjusted through the air extraction and pressure reduction mechanism; the hot air temperature and the internal temperature of the drying container are obtained through the first temperature sensor and the second temperature sensor, so that the internal temperature during drying can be adjusted through the heater of the hot air mechanism, and the drying efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a kind of crystalline trehalose drying device's cross-sectional structure schematic view.

[0017] REFERENCE NUMERALS

[0018] 1, drying container; 2, suction pressure reduction mechanism; 21, cyclone separator; 22, suction pipe; 23, suction pump; 3, hot air mechanism; 31, air blower; 32, heater; 33, air pipe; 34, gas dryer; 35, exhaust pipe; 36, air supply pipe; 4, feeding port; 5, air pressure gauge; 6, stirring mechanism; 61, motor; 62, stirring shaft; 63, stirring blade; 7, first temperature sensor; 8, infrared radiation light wave plate; 9, second temperature sensor; 10, heat-resistant air filter membrane; 11, discharging port; 12, first electromagnetic valve; 13, second electromagnetic valve; 14, third electromagnetic valve; 15, supporting leg; 16, base. DETAILED DESCRIPTION

[0019] To further illustrate the present application, the following description will be made in conjunction with the accompanying drawings. It is particularly pointed out that the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Reference Figure 1 As shown in the drawings, a crystalline trehalose drying device, comprising a device body; the device body comprises a drying container 1, a suction pressure reduction mechanism 2 and a hot air mechanism 3. The device body is also provided with a controller (not shown in the figure), and the controller is electrically connected with the drying container 1, the suction pressure reduction mechanism 2 and the hot air mechanism 3 respectively.

[0021] Specifically, the drying container 1 is provided with a feeding port 4 and an air pressure gauge 5 for detecting the air pressure in the drying container; the drying container 1 is provided with a stirring mechanism 6 and a first temperature sensor 7 for detecting the temperature in the drying container 1. The air pressure gauge 5 and the first temperature sensor 7 are electrically connected with the controller respectively.

[0022] The top of the drying container 1 is provided with an infrared radiation light wave plate 8 for radiation drying of crystalline trehalose. The infrared radiation light wave plate 8 is electrically connected with the controller. The infrared drying emitted by the infrared radiation light wave plate 8 has the advantages of fast drying speed, good drying quality, high energy utilization rate, etc. Through infrared radiation drying of crystalline trehalose, the efficiency and quality of drying can be improved. According to the temperature in the drying container 1 obtained by the first temperature sensor 7, the operating power of the infrared radiation light wave plate 8 is adjusted to ensure that the radiation drying temperature is within a suitable range.

[0023] The infrared radiation light wave plate 8 includes an infrared heating layer, an infrared reflection layer and a thermal insulation layer (not shown in the figure) arranged in sequence. The infrared heating layer can efficiently convert electrical energy into infrared radiation energy, directly act on the surface of crystalline trehalose, excite water molecule vibration and promote rapid evaporation of water. The infrared reflection layer can effectively enhance the reflection effect of infrared radiation, improve the utilization rate of infrared radiation and the drying efficiency. The addition of the thermal insulation layer effectively isolates the influence of the external environment on the infrared radiation light wave plate 8, reduces the heat loss and improves the thermal efficiency of the entire drying device.

[0024] The gas extraction and pressure reduction mechanism 2 is in communication with the inside of the drying container 1 and is used for gas extraction and pressure reduction in the drying container 1. The gas extraction and pressure reduction mechanism 2 can realize the pressure reduction operation in the drying container 1 by extracting the gas in the drying container 1. The pressure reduction lowers the boiling point of water to a certain temperature below the ambient temperature, so that the water molecules in the crystalline trehalose boil and vaporize, the drying temperature and the required energy are reduced, and the drying becomes simple and fast.

[0025] The gas extraction and pressure reduction mechanism 2 includes a cyclone separator 21, a gas extraction pipe 22 and a gas extraction pump 23. One end of the cyclone separator 21 is in communication with the drying container 1 through the gas extraction pipe 22, and the other end is connected with the gas extraction pump 23.

[0026] The gas extraction pump 23 generates negative pressure through the gas extraction pipe 22. The gas and steam in the drying container 1 are sucked into the cyclone separator 21 under the action of negative pressure through the gas extraction pipe 22. The gas and steam sucked into the cyclone separator 21 flow upward under the action of high-speed rotation. The heavier particles (such as trehalose particles and water) are thrown to the wall due to the centrifugal force and slide down to the bottom outlet along the wall, realizing gas-solid separation. The separated gas continues to flow upward and is finally discharged through the gas extraction pump 23. Through the cooperation of the infrared radiation light wave plate and the gas extraction and pressure reduction mechanism 2, the pressure reduction and radiation drying of the crystalline trehalose are realized.

[0027] By observing the reading of the gas pressure gauge 5 in real time, the change of the gas pressure in the drying container 1 can be understood, and the controller can adjust the power or valve opening degree of the gas extraction pump 23 to control the gas extraction rate, so that the gas pressure in the drying container 1 gradually decreases to the required range.

[0028] The hot air mechanism 3 includes a blower 31, a heater 32 and an air pipe 33. One end of the heater 32 is connected with the blower 31, and the other end is in communication with the drying container 1 through the air pipe 33. A second temperature sensor 9 for detecting the temperature of hot air is arranged in the air pipe 33.

[0029] The air blower 31 can provide strong air flow, and the heater 32 is heated to the required temperature to form hot air that enters the drying container 1 through the air pipe 33 to dry the crystalline trehalose inside. Through the cooperation of the hot air mechanism 3 and the air suction and pressure reduction mechanism 2, the pressure reduction boiling drying of the crystalline trehalose is realized. The second temperature sensor 9 can obtain the temperature of the hot air in the air pipe 33, and the first temperature sensor 7 can obtain the temperature inside the drying container 1, so that the hot air mechanism 3 can monitor and feedback the drying temperature inside the crystalline trehalose in real time, so that the power of the heater 32 can be controlled according to the demand through the controller, so as to ensure that the temperature of the crystalline trehalose during boiling drying is kept within the set range, avoiding the influence of overheating or overcooling on the drying effect.

[0030] The air pipe 33 is provided with a heat-resistant air filter film 10 at the connection port of the drying container 1. The heat-resistant air filter film 10 can effectively block impurities and particles in the hot air, ensuring that the hot air entering the drying container 1 is clean, which not only improves the drying effect, but also prevents the crystalline trehalose in the drying container 1 from being contaminated.

[0031] The air blower 31 and the heater 32 are also provided with a gas dryer 34. The gas dryer 34 can preliminarily dry the gas blown out from the air blower 31 to remove part of the moisture and humidity, avoiding the influence of moisture and humidity on the drying effect in the drying container 1.

[0032] The gas dryer 34 is connected with the heater 32 through an exhaust pipe 35, and the exhaust pipe 35 is provided with a gas supply pipe 36 communicating with the air pipe 33; the exhaust pipe 35 is provided with a first electromagnetic valve 12, and the gas supply pipe 36 is provided with a second electromagnetic valve 13.

[0033] When it is necessary to cool the drying container 1, in addition to natural cooling, the second electromagnetic valve 13 can be opened and the first electromagnetic valve 12 can be closed, and then normal temperature air flow is introduced into the drying container 1 to mix with the hot air in the drying container 1, and then the internal temperature is lowered faster through gas circulation, so that the crystalline trehalose in the drying container 1 can be cooled after other drying is completed.

[0034] The bottom of the drying container 1 is provided with a discharge port 11. The feeding port 4 and the discharge port 11 are both provided with a third electromagnetic valve 14. The third electromagnetic valve 14 is electrically connected with the controller, and the opening and closing of the third electromagnetic valve 14 is controlled by the controller, so as to control the feeding and discharging of the crystalline trehalose. The drying container 1 is a horizontally placed cylindrical container, and the bottom surface of the cylindrical container on the two sides of the discharge port 11 is inclined downward along the direction close to the discharge port. The bottom of the cylindrical container is arc-shaped, so that the crystalline trehalose can flow along the arc surface to the bottom, and is collected to the discharge port 11 on the bottom. In the embodiment, the cylindrical container comprises a container body and a closable side cover, and the motor 61 and the air exhaust pipe 22, the air pressure gauge 5 are arranged on the side cover.

[0035] The stirring mechanism 6 comprises a motor 61 arranged on one side of the drying container 1 and a stirring shaft 62 arranged in the drying container 1. One end of the stirring shaft 62 is fixedly connected with the driving shaft of the motor 61, and a plurality of stirring blades 63 are arranged on the two sides of the stirring shaft 62 in a staggered manner.

[0036] The stirring mechanism 6 drives the stirring shaft 62 to rotate through the motor 61, and then drives the stirring blades 63 to stir the trehalose in the drying container, so that the trehalose particles are effectively dispersed and uniformly heated in the drying process, and the conditions of local overheating or insufficient drying are avoided. It can also promote the circulation of hot air in the drying container. When the stirring blades rotate, the hot air is pushed to form a vortex or turbulent flow in the drying container, so that the hot air can more fully contact the trehalose particles, improve the heat exchange efficiency, and thus improve the drying efficiency.

[0037] Preferably, the inner wall of the drying container 1 is provided with a polytetrafluoroethylene anti-sticking coating (not shown in the figure).

[0038] The polytetrafluoroethylene anti-sticking coating has excellent anti-sticking performance, which can effectively prevent the trehalose from adhering to the inner wall of the container during the drying process, so that the drying process is more smooth, and the production efficiency is improved. At the same time, the polytetrafluoroethylene anti-sticking coating has smooth surface characteristics, which helps to reduce the friction and resistance of the material during the drying process, so that the trehalose can be more uniformly distributed in the drying container 1, further improving the drying efficiency and product quality.

[0039] The bottom of the drying container 1 is provided with a plurality of supporting feet 15, and the bottom of the hot air mechanism 3 is provided with a base 16.

[0040] The working steps of the crystalline trehalose drying device for preparing anhydrous trehalose are as follows: the drying process of the crystalline trehalose includes primary drying, secondary drying, tertiary drying and cooling drying in sequence.

[0041] The first drying, the second drying, and the third drying are all drying after decompression radiation drying and decompression boiling drying. During the first drying, the second drying, the third drying, and the cooling drying, the controller controls the power of the air pump to control the air pressure in the drying container 1 to realize decompression drying through the reading of the air pressure gauge; the running power of the infrared radiation light wave plate 8 is controlled by the first temperature sensor 7 to adjust the radiation drying temperature in the drying container 1. The temperature in the drying container 1 is obtained by the first temperature sensor 7, and the temperature of the hot air input by the hot air mechanism 2 is controlled by the second temperature sensor 9, so as to adjust the boiling drying temperature in the drying container 1.

[0042] Specifically, the decompression radiation drying mainly uses the infrared radiation light wave plate 8 to emit infrared radiation to dry the crystalline trehalose in the drying container 1, and the air in the drying container 1 is decompressed by the air decompression mechanism 2, and the radiation drying is performed for a preset time after decompression. The decompression boiling drying mainly uses the hot air mechanism 3 to deliver hot air to the drying container 1 to dry the crystalline trehalose in the drying container 1, and the air in the drying container 1 is decompressed by the air decompression mechanism 2, and the boiling drying is performed for a preset time after decompression. The cooling drying mainly cools the crystalline trehalose to a preset temperature range after three times of drying, and performs cooling drying for a preset time; or the air in the drying container 1 is decompressed by the air decompression mechanism 2, and the normal temperature gas is delivered by the air blower at the same time, the gas pressure is adjusted to a preset range during cooling, and the cooling drying is performed for a preset time.

[0043] Preferably, in the embodiment, the conditions of the first drying are that the gas pressure in the drying container 1 is-0.01~-0.03MPa during decompression radiation drying, and the drying time is 10~20min; the decompression boiling drying is that the hot air temperature is 80-100℃, the wind speed is 10~16m / s, the gas pressure in the drying container 1 is-0.05~-0.07MPa, and the drying time is 10~20min.

[0044] The conditions of the second drying are that the gas pressure in the drying container 1 is-0.03~-0.05MPa during decompression radiation drying, and the drying time is 20~30min; the decompression boiling drying is that the hot air temperature is 60-80℃, the wind speed is 6~10m / s, the gas pressure in the drying container 1 is-0.07~-0.09MPa, and the drying time is 20~30min.

[0045] The conditions of the third drying are: the internal gas pressure of the drying container 1 is -0.02 to -0.05 MPa, and the drying time is 10 to 20 minutes in the reduced pressure radiation drying; the hot air temperature is 40 to 60 DEG C, the wind speed is 4 to 6 m / s, the internal gas pressure of the drying container 1 is -0.05 to -0.07 MPa, and the drying time is 10 to 20 minutes in the reduced pressure boiling drying.

[0046] The conditions of the cooling drying are: the internal temperature of the drying container 1 is 0 to 30 DEG C, the internal gas pressure of the drying container 1 is -0.03 to -0.06 MPa, and the drying time is 10 to 20 minutes.

[0047] The final prepared anhydrous trehalose has a water content of 0.05wt% to 0.2wt%, and a purity of 90% to 98%.

[0048] The preferred embodiments disclosed above are only used to help explain the utility model, and do not limit the utility model to the specific embodiments described. Obviously, according to the content of the specification, other modifications and changes can be made. The embodiments selected and specifically described in the specification are to better explain the principle and practical application of the utility model, so that the skilled in the art can well understand and utilize the utility model, and are not a limitation of the utility model, and any simple modification of the utility model is within the protection scope of the utility model.

Claims

1. A crystalline trehalose drying apparatus, characterized by, The device comprises a device body; the device body comprises a drying container, an air extraction and pressure reduction mechanism, and a hot air mechanism; The drying container is provided with an inlet and an air pressure gauge for detecting the air pressure in the drying container; the drying container is provided with a stirring mechanism and a first temperature sensor for detecting the temperature in the drying container; the top of the drying container is provided with an infrared radiation light wave plate for radiation drying of crystalline trehalose; The air extraction and pressure reduction mechanism is in communication with the inside of the drying container for air extraction and pressure reduction in the drying container; The hot air mechanism comprises a blower, a heater, and an air pipe; one end of the heater is connected with the blower, and the other end is in communication with the drying container through the air pipe; the air pipe is provided with a second temperature sensor for detecting the temperature of hot air, and the connection port of the air pipe and the drying container is provided with a heat-resistant air filter membrane; One side of the bottom of the drying container is provided with an outlet.

2. The crystalline trehalose drying apparatus according to claim 1, wherein The stirring mechanism comprises an electric motor arranged on one side of the drying container and a stirring shaft arranged in the drying container; one end of the stirring shaft is fixedly connected with the driving shaft of the electric motor, and a plurality of stirring blades are arranged on both sides of the stirring shaft in a staggered manner.

3. The crystalline trehalose drying apparatus according to claim 1, wherein The air extraction and pressure reduction mechanism comprises a cyclone separator, an air extraction pipe, and an air extraction pump; one end of the cyclone separator is in communication with the drying container through the air extraction pipe, and the other end is connected with the air extraction pump.

4. The crystalline trehalose drying apparatus according to claim 1, wherein The inner wall of the drying container is provided with a polytetrafluoroethylene anti-sticking coating.

5. The crystalline trehalose drying apparatus according to claim 1, wherein A gas dryer is further arranged between the blower and the heater.

6. The crystalline trehalose drying apparatus according to claim 5, wherein The gas dryer is connected with the heater through an exhaust pipe, and the exhaust pipe is provided with a gas supply pipe in communication with the air pipe; the exhaust pipe is provided with a first electromagnetic valve, and the gas supply pipe is provided with a second electromagnetic valve.

7. The crystalline trehalose drying apparatus according to claim 1, wherein The infrared radiation light wave plate comprises an infrared heating layer, an infrared reflecting layer, and a heat preservation and insulation layer arranged in sequence.

8. The crystalline trehalose drying apparatus according to claim 1, wherein The drying container is a horizontally placed cylindrical container.

9. The crystalline trehalose drying apparatus according to claim 1, wherein A third electromagnetic valve is arranged on the inlet and the outlet.

10. The crystalline trehalose drying apparatus according to claim 1, wherein The bottom of the drying container is provided with a plurality of supporting feet; and the bottom of the hot air mechanism is provided with a base.

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