CN218793901U - Vacuum drying combined system suitable for ultralow moisture demand product - Google Patents
Vacuum drying combined system suitable for ultralow moisture demand product Download PDFInfo
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- CN218793901U CN218793901U CN202223288591.6U CN202223288591U CN218793901U CN 218793901 U CN218793901 U CN 218793901U CN 202223288591 U CN202223288591 U CN 202223288591U CN 218793901 U CN218793901 U CN 218793901U
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Abstract
The utility model belongs to the technical field of drying equipment, a vacuum drying combined system suitable for ultralow moisture demand product is disclosed. The vacuum drying combined system comprises a drying tank, a cold trap and a vacuum system which are connected in sequence; a feed inlet is formed in the kettle cover of the drying tank, a discharge outlet is formed in the kettle bottom, and a spiral ribbon stirring paddle is arranged in the kettle; the cold trap comprises a cold trap box body, and a cold trap coil is arranged in the cold trap box body; the cold trap box body is communicated with the interior of the drying tank body through an air exhaust pipeline, and the cold trap coil is communicated with a compressor refrigerating system; the vacuum system is communicated with the cold trap box body through a pipeline and is used for sucking air or water vapor in the drying tank into the cold trap, and the water vapor is captured by the cold trap coil pipe and condensed into ice so as to dry products in the drying tank. The utility model discloses increase the cold-trap between retort and vacuum system, can realize the drying of catching water under high vacuum, the ultralow temperature, drying effect is good, efficient, can satisfy the drying demand of ultralow moisture product better.
Description
Technical Field
The utility model belongs to the technical field of drying equipment, concretely relates to vacuum drying combined system suitable for ultralow moisture demand product.
Background
In the pharmaceutical manufacturing process, a drying process is often used. For example, in the preparation of a part of a pharmaceutical preparation, the emulsion is dried and degassed by passing the intermediate product through a drying tank.
In the prior art, a drying tank and a vacuum pump are mostly adopted to be matched for use to dry emulsion, for example, patent document CN205948434U discloses a drying tank for stearic acid production, which comprises a tank body, a sealing cover, a sealing ring, a clamp and a vacuum pump, wherein the top end of the tank body is an open tank opening, an annular first inner groove is arranged on the end surface of the top end of the open tank opening, a first feed inlet, a second feed inlet and a first discharge outlet are arranged on the tank body, the first feed inlet is connected with a feed pipeline through a fluid valve, the first discharge outlet is connected with the second feed inlet through a circulating pipeline, an emulsion pump is arranged on the circulating pipeline, and a second discharge outlet is arranged on the bottom end of the tank body; an annular second inner groove is formed in the end face of the sealing cover and matched with the first inner groove, an air suction opening is formed in the top end of the sealing cover, and an air release opening is formed in the sealing cover; the sealing ring is arranged between the first inner groove and the second inner groove; the vacuum pump is communicated with the air pumping port; the utility model discloses a be favorable to improving the drying degasification efficiency in the stearic acid production process. However, the method only adopts the matching of the drying tank and the vacuum pump to dry the emulsion, the ultimate vacuum degree of the tank body of the drying tank cannot meet the requirement, the drying process is slow, the drying effect cannot meet the drying requirement of the ultra-low moisture product, and further improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at to prior art not enough, provide a vacuum drying combined system suitable for ultralow moisture demand product, increase the cold trap between drying can and vacuum system, can realize the drying of catching water under high vacuum, the ultralow temperature, drying effect is good, efficient, can satisfy the drying demand of ultralow moisture product better.
In order to realize the technical purpose, the utility model adopts the following technical proposal:
a vacuum drying combination system suitable for products with ultra-low moisture requirements comprises a drying tank, a cold trap and a vacuum system which are sequentially connected;
a feed inlet is formed in a kettle cover of the drying tank, a discharge outlet is formed in the kettle bottom, and a spiral stirring paddle is arranged in the kettle;
the cold trap comprises a cold trap box body, and a cold trap coil is arranged in the cold trap box body; the cold trap box body is communicated with the inside of the drying tank body through an air exhaust pipeline, and the cold trap coil is communicated with a compressor refrigerating system;
the vacuum system is communicated with the cold trap box body through a pipeline and used for sucking air or water vapor in the drying tank into the cold trap, and the water vapor is captured by the cold trap coil pipe and condensed into ice so as to dry products in the drying tank.
Further, the spiral ribbon stirring paddle comprises a central shaft and a spiral ribbon, the spiral ribbon is fixedly connected to the central shaft, and the central shaft penetrates out of the kettle cover to be connected with the driving mechanism.
Furthermore, a shaft seal structure is arranged between the central shaft and the kettle cover, the shaft seal structure comprises a bearing and a sealing gasket, the bearing is sleeved on the central shaft, and the sealing gasket is sleeved on the bearing and fixedly installed on the kettle cover.
Furthermore, the upper end of the sealing gasket close to the central shaft is provided with an upward convex elastic bending part, and the lower end of the sealing gasket is provided with a downward convex elastic bending part.
Further, the compressor refrigeration system includes a refrigeration compressor and a refrigeration cycle circuit; the inlet end of the cold trap coil is communicated with a refrigeration compressor, and the outlet end of the cold trap coil is communicated with a refrigeration cycle loop; the cold trap box body upper end still is provided with changes white inlet channel and inlet valve, cold trap box body bottom is provided with changes white outlet conduit and outlet valve.
Further, the outer surface of the drying tank is provided with a heat-insulating jacket, the heat-insulating jacket comprises an inlet pipe and an outlet pipe, steam, temperature-control water or heat-conducting oil is introduced into the heat-insulating jacket, and the steam, the temperature-control water or the heat-conducting oil enters the heat-insulating jacket of the drying tank through the inlet pipe and is discharged from the outlet pipe after heat exchange and condensation.
Further, still be provided with manometer, temperature probe and observation window on the cauldron lid, be provided with the light in the jar body of observation window below.
Further, the upper part of the drying tank is of a vertical cylindrical structure, and the lower part of the drying tank is of an inverted cone structure; the discharge hole is formed in the bottom end of the lower inverted cone structure.
Furthermore, the vacuum system adopts a vacuum pump, the vacuum pump is communicated with the box body of the cold trap through a stainless steel pipeline, and a pneumatic butterfly valve is arranged on the stainless steel pipeline close to the cold trap.
Further, an emptying pipeline is also arranged on the kettle cover of the drying tank, and an emptying valve is arranged on the emptying pipeline; and a manual vacuum valve is arranged on an air exhaust pipeline connected with the cold trap box body and the drying tank.
Compared with the prior art, the utility model discloses produced beneficial effect is:
(1) The utility model has the advantages that the helical ribbon stirring paddle is arranged in the drying tank, and the helical ribbon stirring paddle stirs the emulsion under the driving of the driving mechanism, so that the emulsion is uniformly distributed, and the pumping, the evaporation and the drying of water are facilitated; meanwhile, a cold trap is arranged between the drying tank and the vacuum system, a cold trap coil is arranged in a cold trap box body, the cold trap coil is communicated with a compressor refrigerating system, the temperature of the cold trap coil can be controlled below zero (the lowest cold trap temperature can reach-75 ℃), so that water vapor in the drying tank sucked by the vacuum system is condensed into ice, moisture is effectively captured, and the drying efficiency and the drying effect are improved to the greatest extent;
(2) The utility model discloses a shaft seal structure of spiral shell area stirring rake is special construction, shaft seal structure includes bearing and sealed pad, the bearing housing is established on the center pin, sealed pad cover is established on the bearing and fixed mounting is on the cauldron lid, sealed pad is provided with upwards bellied elastic bending portion, the lower extreme is provided with downwards bellied elastic bending portion (i.e. sealed pad inner wall towards cauldron incurve, outer wall towards cauldron incurve) near the upper end of center pin position department, under the condition of taking out vacuum, the elastic bending portion on sealed pad will be inhaled downwards, the vacuum is bigger to adsorb tighter, the elastic bending portion that bulges downwards is to the malleation, the effect is vice versa; through the sealing gasket with the special structure, no matter in the drying tank under the positive and negative pressure states, the sealing gasket can be tightly attached to the central shaft, the airtight effect of the drying tank is ensured, the high vacuum degree can be realized, the suction effect of a vacuum system is improved, and the drying efficiency and the drying effect of the whole system are improved.
Drawings
Fig. 1 is a schematic structural diagram of a vacuum drying combination system according to an embodiment of the present invention;
FIG. 2 is a schematic view of a shaft seal structure of a ribbon stirring paddle according to an embodiment of the present invention;
the symbols in the figure illustrate: 1-drying in a tank; 101-a feed inlet; 102-pressure gauge; 103-lighting lamps; 104-temperature probe; 105-ribbon paddle, 1051-central shaft, 1052-ribbon; 106-heat preservation jacket; 1061-an inlet tube; 1062-outlet pipe; 107-discharge hole; 108-manual vacuum valve, 109-atmospheric valve; 110-a drive motor; 111-a gasket; 1111-elastic bending part; 112-a bearing; 113-an observation window; 2-cold trap; 201-cold trap box; 202-cold trap coil pipe, 203-defrosting water inlet pipe, and 204-defrosting water outlet pipe; 3-a vacuum pump; 301-pneumatic butterfly valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
Example 1
With reference to fig. 1-2, an embodiment of the present invention provides a vacuum drying combination system suitable for products with ultra-low moisture requirement, which includes a drying tank 1, a cold trap 2 and a vacuum pump 3 connected in sequence; a feed inlet 101 is formed in the kettle cover of the drying tank 1, a discharge outlet 107 is formed in the kettle bottom, and a spiral ribbon stirring paddle 105 is arranged in the kettle; the cold trap 2 comprises a cold trap box body 201, a cold trap coil 202 is arranged in the cold trap box body 201, the cold trap box body 201 is communicated with the interior of the tank body of the drying tank 1 through an air exhaust pipeline, and the cold trap coil 202 is communicated with a compressor refrigerating system; the vacuum system is communicated with the cold trap box body 201 through a stainless steel pipeline, and a pneumatic butterfly valve 301 is arranged on the stainless steel pipeline close to the cold trap box body 201; the vacuum system is used for sucking air or water vapor in the drying tank 1 into the cold trap box 201, and the water vapor is captured by the cold trap coil 202 and condensed into ice, so that the emulsion product in the drying tank 1 is dried.
The ribbon stirring paddle 105 comprises a central shaft 1051 and a ribbon 1052, the ribbon 1052 is fixedly connected to the central shaft 1051, the central shaft 1051 penetrates through the kettle cover to be connected with a driving mechanism, and the driving mechanism is a driving motor 110.
The compressor refrigeration system includes a refrigeration compressor (not shown) and a refrigeration cycle (not shown), wherein the inlet end of the cold trap coil 202 is communicated with the refrigeration compressor, the refrigeration compressor provides a water trapping medium (such as freon) for the cold trap coil 202, and the outlet end of the cold trap coil 202 is communicated with the refrigeration cycle.
The kettle cover is also provided with a pressure gauge 102, a temperature probe 104 and an observation window 113, and a lighting lamp 103 is arranged in the tank body below the observation window 113, so that the material state in the tank can be monitored and observed conveniently.
The upper portion of drying cabinet 1 is vertical cylindrical structure, the lower part is the inverted cone structure, discharge gate 107 sets up the bottom at the partial inverted cone structure of lower part, makes things convenient for the material to rely on gravity to discharge, reduces the material and remains.
The outer surface of the drying tank 1 is provided with a heat-insulating jacket 106, and steam, temperature-controlled water or heat-conducting oil is introduced into the heat-insulating jacket 106 and used for controlling the temperature in the drying tank 1; the heat-preservation jacket 106 comprises an inlet pipe 1061 and an outlet pipe 1062, and valves are arranged on the inlet pipe 1061 and the outlet pipe 1062; the steam, temperature-controlled water or heat-conducting oil enters the heat-insulating jacket 106 of the drying tank 1 through the inlet pipe 1061, and is discharged from the outlet pipe 1062 after heat exchange and condensation.
An emptying pipeline is further arranged on the kettle cover of the drying tank 1, and an emptying valve 109 is arranged on the emptying pipeline and used for releasing pressure when the drying tank 1 discharges materials; and a manual vacuum valve 108 is arranged on an air exhaust pipeline connected with the cold trap 2 and the drying tank 1 and used for adjusting the vacuum pressure in the drying tank 1 at the initial starting stage of the vacuum pump 3.
When the drying device works, emulsion is pressed into the drying tank 1 through the feeding hole 101, and the helical ribbon stirring paddle 105 is driven by the driving motor 110 to stir, so that the emulsion is uniformly distributed, and the moisture is sucked, evaporated and dried; the cold trap coil 202 of the cold trap 2 is refrigerated by a compressor refrigeration system, the temperature of the cold trap coil 202 is controlled below zero, meanwhile, the vacuum pump 3 is used for vacuumizing, air and water vapor in the drying tank are sucked into the cold trap box body 201, and the sucked water vapor is condensed into ice by the cold trap coil 202 in the cold trap box body 201.
The embodiment of the utility model provides a cold trap 2 that increases between drying cabinet 1 and vacuum pump 3 can catch moisture effectively, improves drying efficiency and drying effect as far as possible.
In addition, cold-trap box 201 upper end still sets up defrosting inlet channel 203 and inlet valve, cold-trap box bottom is provided with defrosting outlet channel 204 and outlet valve for dry the completion and let in hot water to cold-trap box 201 through defrosting inlet channel 203, melt and catch the ice that condenses on the cold-trap coil pipe 202, play the effect of defrosting, and finally discharge the liquid after the defrosting through defrosting outlet channel 204 and outlet valve.
Example 2
The embodiment of the utility model provides an on the basis of embodiment 1, made following improvement:
referring to fig. 2, a shaft seal structure is arranged between a central shaft 1051 of the ribbon stirring paddle 105 and the kettle cover, the shaft seal structure includes a bearing 112 and a sealing gasket 111, the bearing 112 is sleeved on the central shaft 1051, and the sealing gasket 111 is sleeved on the bearing 112 and is fixedly mounted on the kettle cover.
The sealing gasket 111 is designed in a special structure, and specifically, the upper end of the sealing gasket 111 near the central axis 1051 is provided with an upward convex elastic bending portion 1111, and the lower end is provided with a downward convex elastic bending portion 1111 (that is, the inner wall of the sealing gasket 111 is curved inward the kettle, and the outer wall is curved outward the kettle); under the condition of vacuum pumping, the elastic bending part 1111 on the sealing gasket 111 can suck downwards, the larger the vacuum is, the tighter the suction is, the elastic bending part protruding downwards is directed to positive pressure, and the action is opposite; through the sealing gasket with the special structure, the sealing gasket 111 can be tightly attached to the central shaft 1051 no matter in the drying tank 1 under the positive pressure state or the negative pressure state, so that the sealing effect in the drying tank 1 is ensured, the suction effect of a vacuum system is improved, and the high vacuum degree is realized; the embodiment of the utility model provides an in, vacuum in the cold-trap box 201 is up to 0.1mbar, and vacuum in the drying can 1 is up to 0.15mbar, is favorable to improving entire system's drying efficiency and drying effect.
Example 3
The embodiment of the utility model provides an adopt the vacuum drying combined system among embodiment 2 to the dry CPL-01 (the slowly-releasing injection preparation of ropivacaine) emulsion of drying cylinder that the volume is 50L, its drying process is:
first, whether the drying tank 1 is clean or not is checked, and after the cleaning of the drying tank 1 is confirmed, 41.86kg (about 30kg of water) of an emulsion weighed is pressed into the drying tank 1 through the feed port 101, and the feed port and other ports are closed.
Then, the ribbon stirring paddle 105 is started to stir, and the rotating speed is set to be 38rpm; the temperature of the heat-insulating jacket 106 is set to be 7 ℃ to cool the emulsion, meanwhile, the cold trap 2 is started to refrigerate, when the temperature in the cold trap 2 is lower than minus 40 ℃, the pneumatic butterfly valve 301 is opened to start the vacuum pump 3, the manual vacuum valve 108 is slowly opened to ensure that the emulsion is not boiled, the manual vacuum valve 108 is completely opened, the temperature of the heat-insulating jacket 106 is raised to about 45 ℃, the vacuum pressure is adjusted to 25mbar, under the condition, the moisture in the emulsion is sucked into the cold trap 2 by the vacuum pump 3 and is captured by the cold trap coil 202 to be condensed into ice in the environment lower than minus 40 ℃.
Continuously pumping the moisture of the emulsion in the drying tank 1 into the cold trap 2, adjusting the vacuum pressure to about 0.1mbar after most of the moisture is removed along with the drying, and when the vacuum pressure in the drying tank 1 reaches about 0.15mbar, the moisture content is below 0.2%, and at the moment, after the drying is finished, closing the manual vacuum valve 108, the vacuum pump 3 and the cold trap 2 in sequence, and then opening the emptying valve 109 to release the pressure; and after the pressure relief is finished, carrying out the next operation procedure.
The above description is only an example of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the scope of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A vacuum drying combination system suitable for products with ultra-low moisture requirements is characterized by comprising a drying tank, a cold trap and a vacuum system which are connected in sequence;
a feed inlet is formed in the kettle cover of the drying tank, a discharge outlet is formed in the kettle bottom, and a spiral ribbon stirring paddle is arranged in the kettle;
the cold trap comprises a cold trap box body, and a cold trap coil is arranged in the cold trap box body; the cold trap box body is communicated with the inside of the drying tank body through an air exhaust pipeline, and the cold trap coil is communicated with a compressor refrigerating system;
the vacuum system is communicated with the cold trap box body through a pipeline and is used for sucking air or water vapor in the drying tank into the cold trap, and the water vapor is captured by the cold trap coil pipe and condensed into ice so as to dry products in the drying tank.
2. The vacuum drying combination system of claim 1, wherein the ribbon paddle comprises a central shaft and a ribbon, the ribbon is fixedly connected to the central shaft, and the central shaft passes through the kettle cover and is connected to the driving mechanism.
3. The vacuum drying combination system of claim 2, wherein a shaft seal structure is disposed between the central shaft and the kettle cover, the shaft seal structure comprises a bearing and a gasket, the bearing is sleeved on the central shaft, and the gasket is sleeved on the bearing and is fixedly mounted on the kettle cover.
4. The vacuum drying assembly as claimed in claim 3, wherein the gasket is provided with an upwardly convex elastic bending portion at an upper end near the central axis and a downwardly convex elastic bending portion at a lower end.
5. The vacuum drying combination of claim 1, wherein the compressor refrigeration system comprises a refrigeration compressor and a refrigeration cycle loop; the inlet end of the cold trap coil is communicated with a refrigeration compressor, and the outlet end of the cold trap coil is communicated with a refrigeration cycle loop; the cold trap box body upper end still is provided with changes white inlet channel and inlet valve, cold trap box body bottom is provided with changes white outlet conduit and outlet valve.
6. The vacuum drying combination system as claimed in claim 1, wherein a heat preservation jacket is arranged on the outer surface of the drying tank, the heat preservation jacket comprises an inlet pipe and an outlet pipe, steam, temperature control water or heat conduction oil is introduced into the heat preservation jacket, and the steam, the temperature control water or the heat conduction oil enters the heat preservation jacket of the drying tank through the inlet pipe and is discharged from the outlet pipe after heat exchange.
7. The vacuum drying combination system of claim 1, wherein the kettle cover is further provided with a pressure gauge, a temperature probe and an observation window, and a lighting lamp is arranged in the tank body below the observation window.
8. The dry combination system of claim 1, wherein the upper portion of the dry tank is a vertical cylindrical structure and the lower portion is an inverted conical structure; the discharge hole is formed in the bottom end of the lower inverted cone structure.
9. The vacuum drying combination system as claimed in claim 1, wherein the vacuum system is a vacuum pump, the vacuum pump is communicated with the box body of the cold trap through a stainless steel pipeline, and a pneumatic butterfly valve is arranged on the stainless steel pipeline close to the cold trap.
10. The vacuum drying combination system of claim 1, wherein the kettle cover of the drying tank is further provided with an emptying pipeline, and the emptying pipeline is provided with an emptying valve; and a manual vacuum valve is arranged on an air exhaust pipeline connected with the cold trap box body and the drying tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223288591.6U CN218793901U (en) | 2022-12-05 | 2022-12-05 | Vacuum drying combined system suitable for ultralow moisture demand product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223288591.6U CN218793901U (en) | 2022-12-05 | 2022-12-05 | Vacuum drying combined system suitable for ultralow moisture demand product |
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| Publication Number | Publication Date |
|---|---|
| CN218793901U true CN218793901U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223288591.6U Active CN218793901U (en) | 2022-12-05 | 2022-12-05 | Vacuum drying combined system suitable for ultralow moisture demand product |
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|---|---|
| CN (1) | CN218793901U (en) |
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- 2022-12-05 CN CN202223288591.6U patent/CN218793901U/en active Active
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