CN211261677U - Drying apparatus - Google Patents

Abstract

The utility model provides a drying device, include: the box body is provided with a material inlet and a material outlet, and negative pressure can be formed in the box body; the scraping disc assembly is arranged in the box body and comprises first scraping plates, a first disc body, second scraping plates and a second disc body which are arranged at intervals in the vertical direction, wherein avoidance holes are formed in the first disc body; the microwave structure is arranged on the box body and corresponds to the scraping disc assembly; receive the material structure, set up in material exit. The technical scheme of the application effectively solves the problems of limited single batch material processing amount and low efficiency in the related technology.

Description

Drying apparatus

Technical Field

The utility model relates to a chemical industry medicine production field particularly, relates to a drying equipment.

Background

In chemical and pharmaceutical production, wet materials containing water, organic solvents or both are frequently encountered, and drying treatment is usually required in the post-treatment process. If the processing capacity is small, a heat flow circulation box body can be used, manual transfer is utilized, and if the processing capacity is large, equipment such as double-cone drying is generally selected in a workshop. These devices often meet when carrying out the material drying and consume long, dry not thorough, degree of mechanization is low, the big scheduling problem of dust, and to some heat-sensitive, half life products such as little, it is long when increasing the drying because of factor restrictions such as temperature in the drying process, influence efficiency and project progress, degree of automation is low simultaneously, consumes personnel's cost, brings a great deal of inconvenience for production.

The existing drying techniques include normal pressure drying, vacuum drying, spray drying, fluidized drying, freeze drying, microwave drying, far infrared drying, etc. Wherein the normal pressure drying is carried out under standard atmospheric pressure by using a box type box body (an oven or a drying room). Although the equipment is simple, the drying time is long, and the heat-labile materials are damaged and easy to agglomerate due to overheating.

In a related art patent document with an authorization publication number of CN207886713U, a vacuum drying method is disclosed in which vacuum is applied in a closed space and then the space is evacuated. The method has the advantages of low temperature, loose and easily-crushed product, and drying efficiency depending on vacuum degree and bulk density of the material. In the related art, patent application publication No. CN108444243A discloses that spray drying is performed by dispersing a liquid material into mist droplets using an atomizer and drying the mist droplets using hot air to obtain a dried product, but a product having a relatively high viscosity is difficult to use in this method. Patent publication No. CN101631597A discloses that fluidized drying is a drying method using a fluidized technique, which is suitable for drying wet granular materials, and has the advantages of high drying efficiency, uniform drying, high yield, low temperature, small floor area, etc., but the drying chamber is not easy to clean, the drying chamber is not suitable for drying colored substances, and the proportion of fine powder after drying is large. In the related art, patent document No. CN205482110U discloses freeze-drying, which means that the liquid to be dried is frozen into solid, and water vapor is directly changed from solid to gaseous by sublimation at low temperature and low pressure, and then directly removed. The freeze drying requires high vacuum and low temperature, and is suitable for drying thermolabile medicine and low-melting-point medicine. In the related art, patent document No. CN201653078U discloses a drying method in which infrared ray is used for far infrared drying to vaporize moisture in a material by infrared radiation, but infrared rays are easily absorbed by water vapor and are lost, and are commonly used for measuring moisture in tablet particles at present.

The existing medical drying product equipment utilizes a normal-pressure hot air circulation drying oven, a vacuum thermal circulation drying oven, a double-cone vacuum drying machine and a batch microwave drying oven to carry out drying. The single batch processing material has limited amount, low efficiency, usually manual assistance, extremely low drying efficiency on hydrosolvent, poor processing capability on heat-sensitive drugs and the like.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a drying apparatus to solve the problem of limited material amount and low efficiency in single batch processing in the related art.

In order to achieve the above object, the present invention provides a drying apparatus, comprising: the box body is provided with a material inlet and a material outlet, and negative pressure can be formed in the box body; the scraping disc assembly is arranged in the box body and comprises first scraping plates, a first disc body, second scraping plates and a second disc body which are arranged at intervals in the vertical direction, wherein avoidance holes are formed in the first disc body; the microwave structure is arranged on the box body and corresponds to the scraping disc assembly; receive the material structure, set up in material exit.

Further, the area of the cross section of the first tray is larger than the area of the cross section of the second tray.

Further, the drying equipment also comprises a driving mechanism, wherein the driving mechanism comprises a rotatable driving shaft, and the driving shaft is connected with the first scraper and the second scraper and penetrates through the first disc body and the second disc body.

Furthermore, the driving mechanism also comprises a servo motor, and the servo motor drives the driving shaft to rotate; first scraper blade includes first grillage and connects the first doctor-bar on first grillage, the second scraper blade includes the second grillage and connects the second doctor-bar on the second grillage, first grillage and second grillage all with drive shaft connection, first doctor-bar sets up for first grillage slope, the axis that the free end of first doctor-bar is close to the drive shaft than the link of first doctor-bar, the second doctor-bar sets up for second grillage slope, the axis that the drive shaft was kept away from to the free end of second doctor-bar than the link of second doctor-bar.

Further, the first scraping plate and the first disc body form a first group of scraping discs, the second scraping plate and the second disc body form a second group of scraping discs, the first group of scraping discs are multiple, the second group of scraping discs are multiple, and the plurality of first group of scraping discs and the plurality of second group of scraping discs are arranged alternately.

Furthermore, the drying equipment also comprises a first temperature measuring element and a second temperature measuring element, wherein the first temperature measuring element is positioned on the top wall of the box body, the second temperature measuring element is positioned on the bottom wall of the box body, the microwave structures are multiple, and the microwave structures are positioned on the side wall of the box body and are arranged between the first temperature measuring element and the second temperature measuring element at intervals.

Further, the drying equipment further comprises a vacuum pump, a first gate valve and a second gate valve, a gas inlet and a gas outlet are further formed in the box body, the first gate valve is arranged at the gas inlet, the second gate valve is arranged at the gas outlet, and the gas outlet is communicated with the vacuum pump.

Furthermore, the drying equipment also comprises a material conveying device, and the material conveying device is communicated with the material inlet.

Furthermore, the drying equipment also comprises a spraying device arranged in the box body, the spraying device is positioned on the top wall of the box body, and a liquid collecting tank is also arranged on the bottom wall of the box body.

Further, the drying equipment still includes third gate valve and fourth gate valve, and the third gate valve sets up in material import department, and the fourth gate valve sets up at material exit.

Use the technical scheme of the utility model, drying equipment includes: the device comprises a box body, a scraping disc assembly, a microwave structure and a material receiving structure. The box body is provided with a material inlet and a material outlet, and negative pressure can be formed in the box body. The scraping disc assembly is arranged in the box body. The scraping disc assembly comprises a first scraping plate, a first disc body, a second scraping plate and a second disc body which are arranged at intervals in the vertical direction. In this application, be provided with on the first disk body and dodge the hole, first scraper blade rotationally sets up in the box to can promote the material on the first disk body and remove in the direction from outer to inner. The second scraper blade is rotationally arranged in the box body and can push the materials on the second tray body to move from inside to outside. The microwave structure is arranged on the box body and corresponds to the scraping disc assembly. The material receiving structure is arranged at the material outlet. The procedure for drying the material using the drying apparatus was as follows: the material is added into the box body through the material inlet, meanwhile, negative pressure can be formed in the box body, the whole box body is maintained under a certain vacuum degree condition, and in the drying process, the interior of the box body is always in a negative pressure state. The material entering the box body from the material inlet freely falls onto the solid first tray body. First scraper blade rotationally sets up in the box to can promote the material on the first disk and remove in the direction from outside to inside, with the material dispersion on first disk, the microwave that microwave structure sent this moment is to the material heating drying on the first disk, first scraper blade continues to rotate and promotes the material on the first disk, with the material from dodging on the second disk of promotion below in the hole. The second scraper blade rotationally sets up in the box to can promote the material from interior to exterior direction on the second disk body and remove, with the material dispersion on the second disk body, the microwave that microwave structure sent this moment heats the material drying on the second disk body, the second scraper blade continues to rotate and promotes the material on the second disk body, sends the material on the second disk body to the bottom of box, makes the material can carry to in the collection structure. The whole process of pushing the materials can realize continuous conveying, and the microwaves emitted by the microwave structure are uniformly distributed in the box body. The material contains a solvent comprising methanol, ethanol and water. Like this, at first the microwave structure can guarantee the boiling point that is heated very fast of the inside free water of material with the heating mode of microwave, and secondly the vacuum can guarantee to reduce the boiling point of solvent, then through continuous form feeding, can guarantee that the treatment volume of material in the unit interval is very little, can effectively improve drying efficiency. First scraper blade, first disk body, second scraper blade and second disk body can effectively increase the dispersion effect of solid content in the material, and the inside dispersion of increase solvent at the box improves drying efficiency. Compared with the limited single batch material processing amount in the related technology, the continuous vacuum microwave drying mode is realized through the drying equipment, the material processing amount can be effectively increased, and the labor cost is saved. The material after the drying directly drops to in collecting the structure, has reduced solid in the material and has transported, has reduced being infected with of material and has remained. Therefore, compared with the efficiency of drying by utilizing the normal-pressure hot air circulation drying box, the vacuum thermal circulation drying box, the double-cone vacuum drying machine and the batch microwave drying box in the existing medicine drying product equipment, the water-containing material can be evaporated within 1h/kg when being dried, the production period is greatly shortened, and the efficiency is improved. Therefore, the technical scheme of the application effectively solves the problems of limited single batch material processing amount and low efficiency in the related technology.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a drying apparatus according to the invention; and

fig. 2 shows an enlarged schematic view at a of the drying apparatus of fig. 1.

Wherein the figures include the following reference numerals:

10. a box body; 11. a material inlet; 12. a material outlet; 13. a gas inlet; 14. a gas outlet; 15. a liquid collection tank; 20. a scraping disc assembly; 21. a first squeegee; 211. a first plate frame; 212. a first blade; 22. a first tray body; 221. avoiding holes; 23. a second squeegee; 231. a second plate rack; 232. a second wiper blade; 24. a second tray body; 30. a microwave structure; 40. a material receiving structure; 50. a drive mechanism; 51. a drive shaft; 52. a servo motor; 61. a first temperature measuring element; 62. a second temperature measuring element; 70. a feeding device; 71. a screw conveyor; 72. a hopper; 73. a feed inlet; 80. and (4) a spraying device.

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The inventor finds that the drying conditions of the medical dried product equipment in the related art are shown in the following table 1 in a specific drying condition comparison table when the medical dried product equipment is dried at the same temperature (30-40 ℃) and the same water content in the material:

TABLE 1

Based on the contrast condition of table 1, in order to solve the problem that single batch processing material volume is limited among the correlation technique simultaneously, inefficiency, the application provides a drying equipment.

An embodiment of the drying apparatus according to the application comprises: the device comprises a box body 10, a scraping disc assembly 20, a microwave structure 30 and a material receiving structure 40. The box body 10 is provided with a material inlet 11 and a material outlet 12, and negative pressure can be formed in the box body 10. The wiper blade assembly 20 is disposed within the housing 10. The scraping disc assembly 20 includes a first scraping plate 21, a first disc body 22, a second scraping plate 23 and a second disc body 24 which are arranged at intervals in the up-down direction. In this embodiment, the first tray 22 is provided with a relief hole 221, and the first scraper 21 is rotatably disposed in the box 10 and can push the material on the first tray 22 to move in the direction from outside to inside. The second scraper 23 is rotatably disposed in the box 10 and can push the material on the second tray 24 to move from inside to outside. The microwave structure 30 is disposed on the cabinet 10 and corresponds to the wiper blade assembly 20. The receiving structure 40 is arranged at the material outlet 12.

By applying the technical scheme of the embodiment, the process of drying materials by using drying equipment is as follows: the material is added into the box body 10 through the material inlet 11, meanwhile, negative pressure can be formed in the box body 10, the whole box body 10 is maintained under a certain vacuum degree condition, and in the drying process, the inside of the box body 10 is always in a negative pressure state. Material entering the tank 10 from the material inlet 11 is free to fall onto the solid first pan 22. The first scraper 21 is rotatably disposed in the box 10 and can push the material on the first tray 22 to move in the direction from outside to inside, so as to disperse the material on the first tray 22, at this time, the microwave emitted from the microwave structure 30 heats and dries the material on the first tray 22, the first scraper 21 continuously rotates and pushes the material on the first tray 22, and the material is pushed to the second tray 24 below from the avoiding hole 221. The second scraper 23 is rotatably disposed in the box 10 and can push the material on the second tray 24 to move from inside to outside, so as to disperse the material on the second tray 24, at this time, the microwave emitted from the microwave structure 30 heats and dries the material on the second tray 24, the second scraper 23 continuously rotates and pushes the material on the second tray 24, and the material on the second tray 24 is sent to the bottom of the box 10, so that the material can be conveyed into the collecting structure. The whole process of pushing the materials can realize continuous conveying, and the microwaves emitted by the microwave structure 30 are uniformly distributed in the box body 10. The material contains a solvent comprising methanol, ethanol and water. Like this, firstly microwave structure 30 can guarantee with the heating mode of microwave that the inside free water of material is heated the boiling point very fast, and secondly the vacuum can guarantee to reduce the boiling point of solvent, then through continuous form feeding, can guarantee that the process volume of material in the unit interval is very little, can effectively improve drying efficiency. The first scraper 21, the first tray body 22, the second scraper 23 and the second tray body 24 can effectively increase the dispersion effect of solid components in the material, increase the dispersion of the solvent in the box body 10 and improve the drying efficiency. Compared with the limited single batch material processing amount in the related technology, the continuous vacuum microwave drying mode is realized through the drying equipment, the material processing amount can be effectively increased, and the labor cost is saved. The material after the drying directly drops to in collecting the structure, has reduced solid in the material and has transported, has reduced being infected with of material and has remained. Therefore, compared with the efficiency of drying by utilizing the normal-pressure hot air circulation drying box, the vacuum thermal circulation drying box, the double-cone vacuum drying machine and the batch microwave drying box in the existing medicine drying product equipment, the water-containing material can be evaporated within 1h/kg when being dried, the production period is greatly shortened, and the efficiency is improved. Therefore, the technical scheme of the embodiment effectively solves the problems of limited single batch material processing amount and low efficiency in the related technology.

The collecting structure of the embodiment can be a collecting tank, a collecting barrel, a collecting box and other appliances with accommodating functions, and is within the protection scope of the application.

As shown in fig. 1 and 2, the area of the cross section of the first tray 22 is larger than the area of the cross section of the second tray 24. In this way, material from the first tray 22 can fall onto the second tray 24 such that the second tray 24 can catch the material on the first tray 22.

As shown in fig. 1, the drying apparatus further includes a driving mechanism 50, and the driving mechanism 50 includes a rotatable driving shaft 51, and the driving shaft 51 is connected to the first squeegee 21 and the second squeegee 23 and passes through the first tray 22 and the second tray 24. Thus, the drive shaft 51 can drive the first blade 21 and the second blade 23 to rotate together. Meanwhile, during the rotation of the driving shaft 51, the first disc 22 and the driving shaft 51 are ensured not to interfere, and the second disc 24 and the driving shaft 51 are ensured not to interfere. The direction of rotation of drive shaft 51 is shown by the arrow on drive shaft 51 in fig. 1, but of course the direction of rotation of the drive shaft may be opposite to that shown by the arrow on the drive shaft in fig. 1.

As shown in fig. 1 and 2, the driving mechanism 50 further includes a servo motor 52, and the servo motor 52 drives the driving shaft 51 to rotate. In the process that the servo motor 52 drives the driving shaft 51 to rotate, the rotating speed of the driving shaft 51 driving the first scraper 21 and the second scraper 23 can be automatically controlled and adjusted through the servo motor 52, and further the staying time of the material in the box body 10 is adjusted.

As shown in fig. 1 and 2, the first squeegee 21 includes a first plate frame 211 and a first wiper blade 212 attached to the first plate frame 211. The second blade 23 includes a second plate frame 231 and a second blade 232 attached to the second plate frame 231. The first and second plate frames 211 and 231 are connected to the driving shaft 51, the first wiper blade 212 is disposed obliquely with respect to the first plate frame 211, and the free end of the first wiper blade 212 is closer to the axis of the driving shaft 51 than the connected end of the first wiper blade 212. In this way, the first scraper 212 can spread the material on the first pan 22 in a spiral form (in the direction shown by the arrow above the second scraper 23 in fig. 1) on the first pan 22. The second wiper blade 232 is disposed obliquely with respect to the second plate frame 231, and the free end of the second wiper blade 232 is farther from the axis of the drive shaft 51 than the connected end of the second wiper blade 232. In this way, the second scraper 232 is able to spread the material on the second tray 24 in a spiral fashion (in the direction shown by the arrow above the first scraper 21 in fig. 1) over the second tray 24.

It should be noted that the connecting end of the first blade 212 is the end of the first blade 212 connected to the first plate frame 211, and the connecting end of the second blade 232 is the end of the second blade 232 connected to the second plate frame 231. The first blade 212 is plural, the plural first blades 212 are arranged at intervals on the first plate frame 211, the plural second blades 232 are plural, and the plural second blades 232 are arranged at intervals on the second plate frame 231.

As shown in fig. 1, the first squeegee 21 and the first tray 22 form a first group of squeegee discs, and the second squeegee 23 and the second tray 24 form a second group of squeegee discs. The first group of scraping discs are multiple, and the second group of scraping discs are multiple. The plurality of first group scraping discs and the plurality of second group scraping discs are alternately arranged. Like this a plurality of first scraping plate of group and a plurality of second scraping plate of group can disperse solid composition in the material that gets into from the top of box 10 repeatedly, greatly increased solid composition's in the material dispersion effect, evenly carry the material in succession from the top of box 10 to the receipts material structure of the bottom below of box 10. The first scraper 21 of the first group of scraper discs at the bottom of the box body 10 pushes the material on the bottom of the box body 10 into the material receiving structure.

As shown in FIG. 1, the drying apparatus further includes a first temperature measuring element 61 and a second temperature measuring element 62. The first temperature measuring element 61 is located on the top wall of the case 10, and the second temperature measuring element 62 is located on the bottom wall of the case 10. The microwave structures 30 are multiple, and the multiple microwave structures 30 are located on the side wall of the box body 10 and are arranged between the first temperature measuring element 61 and the second temperature measuring element 62 at intervals. The microwave structure 30 is preferably a magnetron. The microwave power is controlled by a plurality of microwave structures 30 to carry out multilayer temperature control, and different drying rates are set according to different humidity of materials measured by the first temperature measuring element 61 and the second temperature measuring element 62. Therefore, after the material is discharged through the whole drying process, the qualified requirement is directly met, and the deterioration phenomenon cannot occur. The first temperature measuring element 61 of the present embodiment is preferably an infrared temperature measuring tube, and the second temperature measuring element 62 is preferably an infrared temperature measuring tube or a thermocouple or an optical fiber sensor.

As shown in fig. 1, the drying apparatus further includes a vacuum pump, a first gate valve and a second gate valve, and the cabinet 10 further has a gas inlet 13 and a gas outlet 14. The first gate valve is arranged at the gas inlet 13, the second gate valve is arranged at the gas outlet 14, and the gas outlet 14 is communicated with the vacuum pump. The vacuum pump is started, nitrogen enters through the gas inlet 13, the whole drying equipment is vacuumized through the gas outlet 14, the nitrogen circulation in the box body 10 can be adjusted, the drying equipment is maintained under a certain vacuum degree condition, the box body 10 is always in a negative pressure state in the drying process of the drying equipment, a small amount of nitrogen is introduced into the box body 10, and the box body 10 is in a nitrogen protection atmosphere. The first gate valve can open or close the gas inlet 13 and the second gate valve can open or close the gas outlet 14.

As shown in fig. 1, the drying apparatus further includes a feeding device 70, and the feeding device 70 is communicated with the material inlet 11. The material can be fed into the material inlet 11 by means of the feeding device 70. The feeding device 70 comprises a screw conveyor 71, a hopper 72 and a feeding port 73. The hopper 72 is arranged on the screw conveyor 71, the feed port 73 is communicated with the output port of the screw conveyor 71, and the feed port 73 is communicated with the material inlet 11.

As shown in fig. 1, the drying apparatus further includes a spraying device 80 disposed in the box body 10, the spraying device 80 is located on the top wall of the box body 10, and the liquid collecting tank 15 is further disposed on the bottom wall of the box body 10. The spraying device 80 can clean the first scraper 21, the first tray 22, the second scraper 23, the second tray 24 and the inner cavity of the box body 10 in the box body 10, and the liquid collecting tank 15 can collect the cleaned liquid and discharge the liquid through the material outlet 12.

As shown in fig. 1, the drying apparatus further includes a third gate valve disposed at the material inlet 11 and a fourth gate valve disposed at the material outlet 12. A third gate valve can open or close the material inlet 11 and a fourth gate valve can open or close the material outlet 12.

The spray device 80 of the present embodiment is connected with a cleaning solvent. In the cleaning process of the drying apparatus, the material outlet 12 on the bottom wall of the cabinet 10 is closed by the fourth gate valve, the servo motor 52 is turned on, the spraying device 80 is turned on, the leacheate of the cleaning solvent is sprayed into the cabinet 10 through the top wall of the cabinet 10, and the first scraper 21 and the second scraper 23 are driven to rotate by the driving shaft 51, so that the solid components remained on the first scraper 21, the first tray 22, the second scraper 23 and the second tray 24 can be cleaned. After the cleaning process is finished, the material outlet 12 is opened through the fourth gate valve, and the cleaning liquid is discharged. After the cleaning liquid is discharged, the gas inlet 13 and the vacuum pump are opened through the first gate valve, and the interior of the box body 10 is purged, so that the automatic cleaning process is realized. Of course, the cleaning process and the purging process may be repeated according to the process requirements.

The box 10 of the spraying device 80 of the embodiment adopts a columnar design or a square design, the axial unit length of the box 10 is small in volume, the first temperature measuring element 61 and the second temperature measuring element 62 respectively measure the temperature feedback corresponding to different magnetrons, the material inlet 11 and the gas outlet 14 as well as the material outlet 12 and the gas inlet 13, the temperature multi-section control can be realized, the temperature of the material inlet 11 and the gas outlet 14 as well as the temperature of the material outlet 12 and the gas inlet 13 are realized, the drying efficiency of the material in unit time is high, the temperature difference in the box 10 is small, and the uniformity is good. The drying equipment also comprises a static removing device arranged at the material outlet 12, and the static removing device can lead out static electricity generated among materials and eliminate potential safety hazards existing when the materials are discharged from the material outlet 12.

The drying apparatus of the present application is in a continuous mode of operation, which includes continuous feed, discharge, drying and detection. The feeding amount in the box body 10 in unit time is small, the microwave energy is sufficient, the solvent in the material can be quickly dried in a vacuum state, the solvent comprises methanol, ethanol and water, and compared with the efficiency of drying by utilizing a normal-pressure hot air circulation drying box, a vacuum thermal circulation drying box, a double-cone vacuum drying machine and a batch microwave drying box in the existing medical drying product equipment, the drying equipment can be operated in a vacuum sealing mode, the dust pollution is small, and the drying efficiency is high. And can realize multilayer accuse temperature through a plurality of microwave structure 30, the material directly satisfies qualified requirement after coming out through whole drying process, reduces and produces impurity, can not take place rotten phenomenon. Meanwhile, the first scraper 21, the first tray body 22, the second scraper 23 and the second tray body 24 can uniformly and continuously convey materials from the top of the box body 10 to the receiving barrel below the box body 10, and therefore pollution and waste during manual product conveying are reduced. In addition, the drying equipment adopts continuous operation, the equipment structure is compact, and the occupied area is small. The rotation of the driving shaft 51 is controlled by the servo motor 52, the controllability is high, the first valve gate, the second valve gate, the third valve gate and the fourth valve gate will not be opened and closed frequently during the drying operation, and the safety is high. The drying equipment adopts automatic control, reduces the labor cost in the operation and is suitable for large-scale production.

The sidewall of the case is made of 304 stainless steel, but is not limited to metal such as 206 stainless steel, 316L stainless steel, and the like. The materials of the first scraper 21, the first disk 22, the second scraper 23 and the second disk 24 are selected from PTFE, but not limited to PFA, PP, PVDF, PE, etc. The material of the driving shaft 51 is 304 stainless steel, but not limited to metal such as 206 stainless steel, 316L stainless steel, etc., and the outer surface of the driving shaft 51 is coated with a spray coating, which is not limited to PTFE, PFA, PP, PVDF, PE, etc.

The inventors have also found that the drying apparatus of the present application is also able to solve the problems encountered with other forms of drying processes, in particular as follows:

1) the aspect of the heating mode is as follows: the tanks of the related art typically use hot air, circulating hot water, or hot oil to transfer the heat source to the aqueous solvent in the material by heat transfer. Firstly, the heat conduction form rate is slow, so that the temperature of internal materials is uneven, the drying quality of products is influenced, and even the products deteriorate; the microwave heating mode is in the form of electromagnetic waves, and after the solvent absorbs the microwaves, the solvent molecules can be excited to move mutually, and heat is generated by friction. And the drying equipment's of this application dry mode can solve fast because of the slow problem of heat-conduction, in addition, detects material temperature through first temperature element 61 and second temperature element 62, and the power of feedback control magnetron reaches the linkage effect, realizes the multilayer accuse temperature, and the inside of box is equipped with rotatable formula first scraper blade 21 and second scraper blade 23, can guarantee material thermally equivalent, promotes drying efficiency and dry quality.

2) And (3) drying system aspect: in the related art, in the pharmaceutical production, the intermediate or product may contain a large amount of moisture or solvent, the organic solvent may be dried and separated quickly during the drying process, and for the material containing a large amount of water, the conventional drying mode may be difficult to remove in a short time within a limited temperature range due to the large specific heat capacity of water. And the continuous microwave drying of the drying equipment of the application can quickly act on the surface of water molecules by energy, thus reducing the time consumed by heat conduction, and the steam pressure of a solvent can be effectively reduced by adding a vacuum pump, thereby realizing the quick separation of the water molecules and materials.

3) Material property aspect: in the medical synthesis in the related art, heat-sensitive water/organic solvent materials are often encountered, the temperature requirement during drying is extremely strict, and if a traditional heating mode is adopted, the phenomenon of uneven temperature distribution and even local overheating can be caused, so that the product is deteriorated. And the continuous microwave heating of the drying equipment of the application can only act on the solvent, and the material is in a motion state in the box body, thereby avoiding the phenomenon of uneven temperature distribution. Better messenger's temperature has formed the gradient distribution in the box through multilayer segmentation accuse temperature, has reduced the material risk of rotting, has guaranteed the material quality.

The drying plant of the present application, which has performed the material drying operation of the hydrous activated carbon powder, is the water content and drying time data of batch drying and continuous drying in different scales as shown in tables 2 and 3 below:

table 2 bench scale: treatment capacity: 1kg of

Table 3 scale-up: treatment capacity: 50kg of

More preferably, the temperature range of the drying oven is 20-70 ℃, and the stirring speed is 20-50 rpm.

The drying temperature of the drying apparatus of the present application using the continuous microwave includes, but is not limited to, the above range, and the moisture content of the activated carbon can be reduced to the standard by limiting the temperature to the above range.

The drying capacity of the drying apparatus of the present application for the material containing water-activated carbon is further described in detail in conjunction with specific cases, as follows:

case 1: adding activated carbon with water content of 10% into the box body at a constant speed of 50g/min for microwave drying.

The vacuum degree in the box body is 0.07MPa, the temperature in the box body is 25-55 ℃, the retention time of the materials is 6min, and the total drying time is 26 min. The water content of the activated carbon obtained under the above conditions was 1 wt%.

Case 2: the differences from case 1 are: the residence time was 4 min. The water content of the obtained activated carbon was 1.9 wt%.

Case 3: the differences from case 1 are: the drying temperature is 15-55 ℃. The water content of the obtained activated carbon was 2.3 wt%.

Case 4: the differences from case 1 are: the box body of the drying equipment is an intermittent hot air circulation box body in the related technology. The water content of the obtained activated carbon is 1wt%, and the drying time is 12.6 h.

From the above description, it can be seen that the drying apparatus of the present application can achieve the following technical effects through the above case:

as can be seen from comparison of cases 1 to 4, compared with the batch type hot air circulation box in the related art, the box of the drying apparatus of the present application can improve the drying efficiency of the activated carbon, reduce the drying time, and have a smaller amplification effect, while ensuring the water content of the activated carbon.

As can be seen from comparative examples 1 to 3, the drying temperature and residence time are limited to the preferable ranges of the drying apparatus of the present application, which is advantageous in increasing the drying rate of the activated carbon.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. Drying apparatus, characterized in that it comprises:

the box body (10) is provided with a material inlet (11) and a material outlet (12), and negative pressure can be formed in the box body (10);

the scraping disc assembly (20) is arranged in the box body (10), the scraping disc assembly (20) comprises first scraping plates (21), first disc bodies (22), second scraping plates (23) and second disc bodies (24), the first scraping plates (21), the first disc bodies (22), the second scraping plates (23) and the second disc bodies (24) are arranged at intervals in the vertical direction, avoidance holes (221) are formed in the first disc bodies (22), the first scraping plates (21) are rotatably arranged in the box body (10) and can push materials on the first disc bodies (22) to move in the direction from outside to inside, and the second scraping plates (23) are rotatably arranged in the box body (10) and can push materials on the second disc bodies (24) to move in the direction from inside to outside;

the microwave structure (30) is arranged on the box body (10) and corresponds to the scraping disc assembly (20);

the material receiving structure (40) is arranged at the material outlet (12).

2. Drying apparatus according to claim 1, wherein the area of the cross-section of the first tray (22) is larger than the area of the cross-section of the second tray (24).

3. Drying apparatus according to claim 1, further comprising a drive mechanism (50), the drive mechanism (50) comprising a rotatable drive shaft (51), the drive shaft (51) being connected to the first (21) and second (23) scrapers and passing through the first (22) and second (24) discs.

4. Drying apparatus according to claim 3,

the driving mechanism (50) further comprises a servo motor (52), and the servo motor (52) drives the driving shaft (51) to rotate;

the first scraper (21) comprises a first plate frame (211) and a first scraper blade (212) connected to the first plate frame (211), the second scraper (23) comprises a second plate frame (231) and a second scraper blade (232) connected to the second plate frame (231), the first plate frame (211) and the second plate frame (231) are both connected to the driving shaft (51),

the first wiper blade (212) is arranged obliquely to the first plate frame (211), a free end of the first wiper blade (212) is closer to the axis of the drive shaft (51) than a connected end of the first wiper blade (212), the second wiper blade (232) is arranged obliquely to the second plate frame (231), and a free end of the second wiper blade (232) is farther from the axis of the drive shaft (51) than a connected end of the second wiper blade (232).

5. Drying apparatus according to claim 1, wherein the first scraper (21) and the first disc (22) form a first set of scraper discs, the second scraper (23) and the second disc (24) form a second set of scraper discs, the first set of scraper discs being plural, the second set of scraper discs being plural, a plurality of the first set of scraper discs and a plurality of the second set of scraper discs being arranged alternately.

6. Drying apparatus according to claim 1, further comprising a first temperature measuring element (61) and a second temperature measuring element (62), said first temperature measuring element (61) being located on a top wall of said cabinet (10), said second temperature measuring element (62) being located on a bottom wall of said cabinet (10), said microwave structures (30) being plural, said microwave structures (30) being located on a side wall of said cabinet (10) and being arranged at intervals between said first temperature measuring element (61) and said second temperature measuring element (62).

7. Drying apparatus according to claim 1, further comprising a vacuum pump, a first gate valve and a second gate valve, the box (10) further having a gas inlet (13) and a gas outlet (14), the first gate valve being provided at the gas inlet (13), the second gate valve being provided at the gas outlet (14), the gas outlet (14) being in communication with the vacuum pump.

8. Drying apparatus according to claim 1, characterised in that it further comprises a feed conveyor (70), said feed conveyor (70) being in communication with said material inlet (11).

9. Drying apparatus according to claim 1, further comprising a spray device (80) arranged within the cabinet (10), the spray device (80) being located on a top wall of the cabinet (10), the bottom wall of the cabinet (10) further being provided with a liquid collection tank (15).

10. Drying apparatus according to claim 1, further comprising a third gate valve arranged at the material inlet (11) and a fourth gate valve arranged at the material outlet (12).

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