A mannose dryer and process with the function of mannose crystallization separation

Abstract

The present invention provides a mannitol dryer and process with a function of mannitol crystallization separation, which relates to the field of household kitchens. The mannitol dryer with a function of mannitol crystallization separation includes a heat preservation jacket. A top cover is installed at the top port of the heat preservation jacket. A plurality of drying movable plates are evenly and rotatably connected to the inner circumference of the top cover. Electric heating wires are arranged inside the drying movable plates. A liquid outlet pipe is rotatably connected to the middle of the top cover. Four rows of nozzle groups are evenly installed on the outer part of the liquid outlet pipe. The nozzle groups are formed by a plurality of nozzles evenly arranged from top to bottom. Bent pipes are installed at the bottom of both sides of the liquid outlet pipe. After the crystallization is dried and precipitated by the drying movable plates, it can be quickly exposed to the outside, which is convenient for the feeding and separation of the crystallization product, and improves the heat exchange and drying and precipitation efficiency of the solution. And through the high-pressure and high-temperature air flow, the precipitated D-mannitol crystals are blown off, avoiding the situation of crystal contamination.

Description

Technical Field

[0001] The present invention relates to the technical field of mannose drying, and specifically to a mannose dryer and process with a mannose crystallization separation function. Background Art

[0002] Mannose is an organic compound that plays an important role in the human metabolic process, especially in the glycosylation of specific proteins. D-mannose can be prepared by hydrolyzing polysaccharides rich in D-mannose (such as ivory palm seeds, yeast mannan, etc.), or by epimerization of D-glucose, or by methods such as increasing the carbon chain of D-arabinose.

[0003] In the process of preparing mannose by epimerization of D-glucose, it is usually necessary to refine it with absolute ethanol, that is, soak the crude mannose with absolute ethanol in an amount of 10-30% of the weight of the wet mannose for 20-30 minutes for refining. The refined mixed solution also needs to be dried to precipitate the required D-mannose crystals. In the existing dryer, during use, most of the precipitated crystals are inside the dryer, which is not convenient for separating and taking the crystals. At the same time, the drying channels immersed in the solution result in low heat exchange efficiency of the solution, thereby affecting the efficiency of crystal drying and precipitation, and it is inconvenient to use. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a mannose dryer and process with a mannose crystallization separation function, which solves the problems that in the existing dryer during use, most of the precipitated crystals are inside the dryer, which is not convenient for separating and taking the crystals, and at the same time, the drying channels immersed in the solution result in low heat exchange efficiency of the solution, thereby affecting the efficiency of crystal drying and precipitation.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A mannose dryer with a mannose crystallization separation function includes a heat preservation jacket. The top port of the heat preservation jacket is provided with a top cover. Inside the top cover, a plurality of drying movable plates are evenly rotatably connected around the inner circumference. Electric heating wires are arranged inside each of the drying movable plates. The middle part of the top cover is rotatably connected with a liquid outlet pipe. Four rows of nozzle groups are evenly installed outside the liquid outlet pipe. The nozzle groups are formed by a plurality of nozzles evenly arranged from top to bottom. Bent pipes are installed at both bottom sides of the liquid outlet pipe. The two bent pipes are centrosymmetric about the axial center line of the liquid outlet pipe. The outlet ends of the bent pipes are deflected downward. A second conical bottom is installed below the inner part of the heat preservation jacket. The bottom middle parts of the drying movable plates are respectively rotatably connected to the edge of the second conical bottom around the circumference.

[0006] Preferably, the tops of the upper-side rotating shafts of the drying trapdoors all penetrate through the top cover and are equipped with driven gears. The top of the top cover is rotatably connected with a toothed ring. The outer sides of the toothed ring are respectively meshed and connected with the driven gears. One side of the inner side of the toothed ring is meshed and connected with a driving gear, and a motor is installed at the top of the driving gear.

[0007] Preferably, a liquid inlet connecting pipe is installed in the middle of the top of the top cover. The top port of the liquid outlet pipe penetrates through the top cover and is rotatably connected inside the bottom port of the liquid inlet connecting pipe. The side of the motor is installed on one side of the liquid inlet connecting pipe.

[0008] Preferably, an exhaust pipe is installed on the other side of the top of the top cover where the liquid inlet connecting pipe is located.

[0009] Preferably, a first conical bottom is installed at the bottom port of the heat preservation jacket, and a discharge pipe is installed in the middle of the bottom end of the first conical bottom.

[0010] Preferably, a plurality of air pipes are evenly installed around the edge of the top cover. The bottom ends of the air pipes respectively penetrate through the top cover and extend to the bottom port of the heat preservation jacket. A plurality of air nozzles are installed on the side of each air pipe facing the drying trapdoor.

[0011] Preferably, a drying process of a mannitol dryer with a mannitol crystallization separation function is characterized by comprising the following steps:

[0012] S1. Connect the inlet end of the liquid inlet connecting pipe to a pumping station. The inlet end of this pumping station is connected to the outlet end of a liquid storage tank containing the solution rich in mannitol to be dried, and keep the horizontal height of this liquid storage tank lower than the horizontal height of the first conical bottom. At the same time, connect the outlet end of the drain pipe to the inlet end of this liquid storage tank;

[0013] S2. Connect the inlet end of the exhaust pipe to a negative pressure fan, and connect the inlet end of the annular pipe to a blower;

[0014] S3. Start the pumping station, pump the solution rich in mannitol to be dried in S1 into the liquid outlet pipe through the liquid inlet connecting pipe, and then through the four-row nozzle group outside the liquid outlet pipe, a solution curtain can be sprayed out in four directions respectively. Further, the solution sprayed out from the two side elbows will drive the liquid outlet pipe to rotate, so that the solution can be evenly sprayed layer by layer onto the inner surface of the drying trapdoor. The solution rich in mannitol to be dried in S1 is a crude crystalline D-mannitol mixed solution refined by soaking in absolute ethanol.

[0015] S4. Control the electric heating wire inside the drying trapdoor to work, so that the surface temperature of the drying trapdoor is heated to 80 - 85 °C. When the mixed solution is sprayed layer by layer onto the inner surface of the drying trapdoor, the high temperature causes the absolute ethanol to vaporize and be discharged through the negative pressure fan. At this time, the crystalline D-mannose in the mixed solution can crystallize and precipitate on the inner surface of the drying trapdoor. Meanwhile, the falling mixed solution will be collected by the second conical bottom and the drain pipe and then flow into the liquid storage tank, waiting to crystallize and precipitate again;

[0016] S5. When the inner surface of the drying trapdoor is covered with precipitated D-mannose crystals, control the pump station to pause work, and then control the motor to work, thereby driving the gear to drive the toothed ring to rotate, and then driving all the drying trapdoors to deflect through the driven gear until the inner and outer surfaces of the drying trapdoor exchange positions, and then the motor immediately stops;

[0017] S6. Control the blower to work. At this time, the air in the external environment will form a high-pressure and high-temperature airflow, and after being guided by the annular pipe and the air duct, it will be ejected onto the outer surface of the drying trapdoor, thereby blowing off the D-mannose crystals precipitated on the outer surface at this time. After being collected by the first conical bottom, it will be discharged from the discharge pipe. Repeating this process can realize the drying process of the mannose dryer with the mannose crystal separation function.

[0018] The present invention provides a mannose dryer and process with a mannose crystal separation function. It has the following beneficial effects:

[0019] Through the design of the drying trapdoor in the present invention, after the crystals are dried and precipitated, they can be quickly exposed to the outside, which is convenient for taking and separating the crystal products, avoiding the situation in the previous dryer design where the crystal products are inside the dryer and it is inconvenient to take the materials. Further, the solution sprayed from the two side elbows will drive the liquid discharge pipe to rotate, so that the solution can be evenly sprayed layer by layer onto the inner surface of the drying trapdoor, improving the heat exchange efficiency of the solution, and thus improving the efficiency of crystal drying and precipitation. By forming a high-pressure and high-temperature airflow from the air in the external environment and guiding it through the annular pipe and the air duct to be ejected onto the outer surface of the drying trapdoor, the D-mannose crystals precipitated on the surface of the drying trapdoor at this time can be blown off and discharged from the discharge pipe after being collected by the first conical bottom, avoiding the situation of crystal contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 is Figure 1 another perspective schematic diagram of the structure in

[0022] Figure 3 is an internal structural schematic diagram of the heat preservation jacket of the present invention;

[0023] Figure 4 is Figure 3 a schematic diagram of the decomposition of the middle structure;

[0024] Figure 5 is a schematic diagram of the top cover structure of the present invention;

[0025] Figure 6 is a schematic diagram of the drying trapdoor structure of the present invention;

[0026] Figure 7 is a schematic diagram of the liquid outlet pipe structure of the present invention;

[0027] Figure 8 is a schematic diagram of the air duct structure of the present invention;

[0028] Figure 9 is a schematic diagram of the second conical bottom structure of the present invention.

[0029] Among them, 1, heat preservation jacket; 2, first conical bottom; 3, discharge pipe; 4, top cover; 5, second conical bottom; 6, drain pipe; 7, drying trapdoor; 8, driven gear; 9, toothed ring; 10, driving gear; 11, motor; 12, liquid inlet connecting pipe; 13, liquid outlet pipe; 14, elbow; 15, exhaust pipe; 16, ring pipe; 17, air duct. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment:

[0032] As Figures 1-9 shown, an embodiment of the present invention provides a mannitol dryer with a mannitol crystallization separation function, including a heat preservation jacket 1. A top cover 4 is installed at the top port of the heat preservation jacket 1. A plurality of drying trapdoors 7 are evenly and rotatably connected to the inner circumference of the top cover 4. Electric heating wires are arranged inside each of the drying trapdoors 7. A liquid outlet pipe 13 is rotatably connected to the middle of the top cover 4. Four rows of nozzle groups are evenly installed outside the liquid outlet pipe 13. The nozzle groups are formed by a plurality of nozzles evenly arranged from top to bottom. Elbows 14 are installed at the bottoms on both sides of the liquid outlet pipe 13. The two elbows 14 are centrosymmetric about the axial center line of the liquid outlet pipe 13. The outlet ends of the elbows 14 are deflected downward. A second conical bottom 5 is installed below the inner part of the heat preservation jacket 1. The bottom ends of the drying trapdoors 7 are respectively rotatably connected to the edge of the second conical bottom 5 in a circumferential manner.

[0033] In the above structure, the solution rich in mannose to be dried is pumped into the liquid outlet pipe 13 through the liquid inlet connecting pipe 12, and then a solution curtain can be sprayed in four directions through the four-row nozzle group outside the liquid outlet pipe 13. Further, the solution sprayed from the two side bent pipes 14 will drive the liquid outlet pipe 13 to rotate, so that the solution can be evenly sprayed onto the inner surface of the drying movable plate 7 layer by layer, improving the heat exchange efficiency of the solution, and further improving the crystallization and drying efficiency.

[0034] Further, the tops of the upper side rotating shafts of the drying movable plate 7 all penetrate through the top cover 4 and are provided with driven gears 8. A toothed ring 9 is rotatably connected to the top of the top cover 4. The outer sides of the toothed ring 9 are respectively meshed and connected with the driven gears 8. One side of the inner side of the toothed ring 9 is meshed and connected with a driving gear 10, and a motor 11 is installed at the top of the driving gear 10.

[0035] Further, a liquid inlet connecting pipe 12 is installed in the middle of the top of the top cover 4. The top port of the liquid outlet pipe 13 penetrates through the top cover 4 and is rotatably connected inside the bottom port of the liquid inlet connecting pipe 12. The side of the motor 11 is installed on one side of the liquid inlet connecting pipe 12.

[0036] When the inner surface of the drying movable plate 7 is covered with precipitated D-mannose crystals, the control pump station is controlled to suspend operation, and then the motor 11 is controlled to operate. Then, the driving gear 10 drives the toothed ring 9 to rotate, and then drives all the drying movable plates 7 to deflect through the driven gears 8 until the inner and outer surfaces of the drying movable plate 7 exchange positions, and then the motor 11 immediately stops operating. In this way, the crystals can be exposed to the outside, facilitating the taking and separation of the crystals, so as to realize the separation from the solution.

[0037] Further, an exhaust pipe 15 is installed on the other side of the top of the top cover 4 where the liquid inlet connecting pipe 12 is located.

[0038] In this embodiment, the solution rich in mannose to be dried is a mixed solution of crude crystalline D-mannose refined by soaking in absolute ethanol. When the mixed solution is sprayed onto the inner surface of the drying movable plate 7 layer by layer, the high temperature causes the absolute ethanol to vaporize and is discharged through the negative pressure fan. At this time, the crystalline D-mannose in the mixed solution can crystallize and precipitate on the inner surface of the drying movable plate 7. At the same time, the falling mixed solution will be collected by the second conical bottom 5 and the drain pipe 6 and then flow into the storage tank, waiting to crystallize and precipitate again, while the condensation and liquefaction equipment is used to liquefy and recover the vaporized absolute ethanol.

[0039] Further, a first conical bottom 2 is installed at the bottom port of the heat preservation jacket 1, and a discharge pipe 3 is installed in the middle of the bottom end of the first conical bottom 2.

[0040] Further, a plurality of air ducts 17 are evenly installed around the edge of the top cover 4. The bottom ends of the air ducts 17 respectively penetrate through the top cover 4 and extend to the bottom port of the heat preservation jacket 1. A plurality of air nozzles are installed on one side of the air ducts 17 facing the drying trapdoor 7.

[0041] Control the blower to work. At this time, the air in the external environment will form a high-pressure air flow. After being guided by the annular duct 16 and the air ducts 17, it will be ejected onto the outer surface of the drying trapdoor 7, so as to blow off the D-mannose crystals precipitated on the outer surface at this time. After being collected by the first conical bottom 2, it will be discharged from the discharge pipe 3. Repeating this process can realize the drying process of the mannose dryer with the mannose crystal separation function. This method is convenient to operate and avoids the situation of crystal contamination.

[0042] Further, this embodiment also provides a drying process of a mannose dryer with a mannose crystal separation function, including the following steps:

[0043] S1. Connect the inlet end of the liquid inlet connecting pipe 12 to a pump station. The inlet end of the pump station is connected to the outlet end of a liquid storage tank containing the solution rich in mannose to be dried, and keep the horizontal height of the liquid storage tank lower than the horizontal height of the first conical bottom 2. At the same time, connect the outlet end of the drain pipe 6 to the inlet end of the liquid storage tank;

[0044] S2. Connect the inlet end of the exhaust pipe 15 to a negative pressure fan. The air outlet of the negative pressure fan is connected to a condensation liquefaction device. Connect the inlet end of the annular duct 16 to a blower. The inlet end of the blower is connected with an air drying filter, and an air heating box is connected in series in the connecting air duct between the blower and the annular duct 16;

[0045] S3. Start the pump station, pump the solution rich in mannose to be dried in S1 into the liquid outlet pipe 13 through the liquid inlet connecting pipe 12, and then a solution curtain can be sprayed in four directions through the four-row nozzle group outside the liquid outlet pipe 13. Further, the solution sprayed from the two side elbows 14 will drive the liquid outlet pipe 13 to rotate, so that the solution can be evenly sprayed layer by layer onto the inner surface of the drying trapdoor 7. The solution rich in mannose to be dried in S1 is a crude crystalline D-mannose mixed solution refined by soaking in absolute ethanol;

[0046] S4. Control the electric heating wire inside the drying trapdoor 7 to work, so that the surface temperature of the drying trapdoor 7 is heated to 80 - 85 °C. When the mixed solution is sprayed layer by layer onto the inner surface of the drying trapdoor 7, the high temperature causes the absolute ethanol to vaporize and be discharged by the negative pressure fan. At this time, the crystalline D-mannose in the mixed solution can crystallize and precipitate on the inner surface of the drying trapdoor 7. At the same time, the falling mixed solution will be collected by the second conical bottom 5 and the drain pipe 6 and then flow into the liquid storage tank, waiting for crystallization and precipitation again;

[0047] S5. When the inner surface of the drying trap door 7 is covered with precipitated D-mannose crystals, control the pump station to suspend operation, and then control the motor 11 to operate, thereby driving the gear 10 to drive the toothed ring 9 to rotate, and then driving all the drying trap doors 7 to deflect through the driven gear 8 until the inner and outer surfaces of the drying trap door 7 exchange positions, and then the motor 11 immediately stops operating;

[0048] S6. Control the blower to operate. At this time, the air in the external environment will form a high-pressure and high-temperature air flow, and after being guided by the annular pipe 16 and the air pipe 17, it will be ejected onto the outer surface of the drying trap door 7, thereby blowing off the precipitated D-mannose crystals on the outer surface at this time, and after being collected by the first conical bottom 2, it will be discharged from the discharge pipe 3. Repeating this process can achieve the drying process of the mannose dryer with the function of mannose crystal separation.

[0049] In the above steps, the condensation and liquefaction equipment is used to liquefy and recover the vaporized absolute ethanol. The purpose of the air drying filter and the air heating box is to ensure the cleanliness of the incoming air flow and avoid contaminating the precipitated crystal products.

[0050] In this embodiment, through the design of the drying trap door 7, after the crystals are dried and precipitated, they can be quickly exposed to the outside, which is convenient for taking and separating the crystal products, avoiding the situation in the design of the previous dryer where the crystal products are inside the dryer and it is inconvenient to take the materials. Further, the solution ejected from the two side bent pipes 14 will drive the liquid discharge pipe 13 to rotate, so that the solution can be evenly sprayed layer by layer onto the inner surface of the drying trap door 7, improving the heat exchange efficiency of the solution, and further improving the efficiency of crystal drying and precipitation. By forming a high-pressure and high-temperature air flow from the air in the external environment and ejecting it onto the outer surface of the drying trap door 7 after being guided by the annular pipe 16 and the air pipe 17, the precipitated D-mannose crystals on the surface of the drying trap door 7 at this time can be blown off, and after being collected by the first conical bottom 2, it will be discharged from the discharge pipe 3, avoiding the situation of crystal contamination.

[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mannitol dryer with the function of separating mannitol crystals, including a heat preservation jacket (1), characterized in that: The top port of the heat preservation jacket (1) is provided with a top cover (4). Inside the top cover (4), a plurality of drying flaps (7) are evenly and rotatably connected around the inner circumference. Electric heating wires are arranged inside each of the drying flaps (7). The middle part of the top cover (4) is rotatably connected with a liquid outlet pipe (13). Four columns of nozzle groups are evenly installed on the outer part of the liquid outlet pipe (13). The nozzle groups are formed by a plurality of nozzles evenly arranged from top to bottom. On both sides of the bottom of the liquid outlet pipe (13), elbow pipes (14) are installed. The two elbow pipes (14) are centrosymmetric about the axial center line of the liquid outlet pipe (13). The outlet ends of the elbow pipes (14) are deflected downward. A second conical bottom (5) is installed below the inner part of the heat preservation jacket (1). The middle parts of the bottom ends of the drying flaps (7) are respectively rotatably connected to the edge of the second conical bottom (5) around the circumference.

2. The mannitol dryer with a mannitol crystallization separation function according to claim 1, wherein: The top ends of the upper side rotating shafts of the drying flaps (7) all penetrate through the top cover (4) and are installed with driven gears (8). A toothed ring (9) is rotatably connected to the top of the top cover (4). The outer sides of the toothed ring (9) are respectively meshed and connected with the driven gears (8). One side of the inner side of the toothed ring (9) is meshed and connected with a driving gear (10). A motor (11) is installed at the top end of the driving gear (10).

3. The mannitol dryer with the function of mannitol crystallization separation according to claim 2, wherein: A liquid inlet connecting pipe (12) is installed in the middle of the top of the top cover (4). The top port of the liquid outlet pipe (13) penetrates through the top cover (4) and is rotatably connected inside the bottom port of the liquid inlet connecting pipe (12). The side of the motor (11) is installed on one side of the liquid inlet connecting pipe (12).

4. A mannitol dryer with a mannitol crystallization separation function according to claim 3, characterized in that: A steam exhaust pipe (15) is installed on the other side of the top of the top cover (4) where the liquid inlet connecting pipe (12) is located.

5. A mannose dryer with a mannose crystallization separation function according to claim 1, characterized in that: The bottom port of the heat preservation jacket (1) is installed with a first conical bottom (2). The middle part of the bottom end of the first conical bottom (2) is installed with a discharge pipe (3).

6. The mannitol dryer with a mannitol crystallization separation function according to claim 1, wherein: A plurality of air pipes (17) are evenly installed around the edge of the top cover (4). The bottom ends of the air pipes (17) respectively penetrate through the top cover (4) and extend to the bottom port of the heat preservation jacket (1). A plurality of air nozzles are installed on the side of each air pipe (17) facing the drying flap (7).

7. A drying process for a mannose dryer with a mannose crystallization separation function, using a mannose dryer with a mannose crystallization separation function as described in any one of claims 1-6, characterized in that: It includes the following steps: S1. Connect the inlet end of the liquid inlet connecting pipe (12) to a pumping station. The inlet end of this pumping station is connected to the outlet end of a liquid storage tank containing the solution rich in mannose to be dried, and keep the horizontal height of this liquid storage tank lower than the horizontal height of the first conical bottom (2). At the same time, connect the outlet end of the drain pipe (6) to the inlet end of this liquid storage tank; S2. Connect the inlet end of the steam exhaust pipe (15) to a negative pressure fan, and connect the inlet end of the annular pipe (16) to a blower; S3. Start the pump station, pump the solution rich in mannose to be dried in S1 into the liquid outlet pipe (13) through the liquid inlet connecting pipe (12), and then through the four-row nozzle group outside the liquid outlet pipe (13), a solution curtain can be sprayed in each of the four directions. Further, the solution sprayed from the two side elbows (14) will drive the liquid outlet pipe (13) to rotate, so that the solution can be evenly sprayed layer by layer onto the inner surface of the drying plate (7). The solution rich in mannose to be dried in S1 is a crude crystalline D-mannose mixed solution refined by soaking in absolute ethanol. S4. Control the electric heating wire inside the drying plate (7) to work, so that the surface temperature of the drying plate (7) is heated to 80 - 85 °C. When the mixed solution is sprayed layer by layer onto the inner surface of the drying plate (7), the high temperature causes the absolute ethanol to vaporize and be discharged through the negative pressure fan. At this time, the crystalline D-mannose in the mixed solution can crystallize and precipitate on the inner surface of the drying plate (7). At the same time, the falling mixed solution will be collected by the second conical bottom (5) and the drain pipe (6) and then flow into the storage tank, waiting to crystallize and precipitate again. S5. When the inner surface of the drying plate (7) is covered with precipitated D-mannose crystals, control the pump station to pause working, and then control the motor (11) to work, and then drive the gear (10) to drive the toothed ring (9) to rotate, and then drive all the drying plates (7) to deflect through the driven gear (8) until the inner and outer surfaces of the drying plate (7) exchange positions, and then the motor (11) immediately stops operating. S6. Control the blower to work. At this time, the air in the external environment will form a high-pressure and high-temperature air flow, and after being guided by the annular pipe (16) and the air duct (17), it will be ejected onto the outer surface of the drying plate (7), so as to blow off the D-mannose crystals precipitated on the outer surface at this time, and after being collected by the first conical bottom (2), it will be discharged from the discharge pipe (3). Repeating this process can realize the drying process of the mannose dryer with the function of mannose crystal separation.

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