Drying device for polyvinylpolypyrrolidone

Abstract

The utility model discloses a drying device for polyvinylpolypyrrolidone, and particularly relates to the technical field of polyvinylpolypyrrolidone, the drying device comprises a drying cylinder, a cover body is arranged at the top of the drying cylinder, an exhaust pipe is arranged on one side of the bottom end of the drying cylinder, the drying cylinder is provided with a base, an air inlet pipe is arranged in the middle of the base, and an air outlet pipe is arranged in the middle of the base. One end of the air inlet pipe is connected with an air heater, the other end of the air inlet pipe is connected with an air spraying pipe, a plurality of air holes are formed in the outer wall of the air spraying pipe, and an injection pipe is arranged on one side of the top end of the drying cylinder. According to the cross-linked povidone powder drying device, hot air is continuously fed into the air spraying pipe through the external air heater and the air inlet pipe, the hot air is evenly sprayed out of the air spraying pipe and sprayed towards the inner wall of the drying cylinder, cross-linked povidone powder is rapidly blown away by the sprayed hot air, the cross-linked povidone powder is dispersed in the drying cylinder, rapid drying is facilitated, and therefore the drying effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cross-linked polyvinylpyrrolidone, in particular to a drying device for cross-linked polyvinylpyrrolidone. Background Art

[0002] Cross-linked polyvinylpyrrolidone is a polymer with a high molecular weight and a cross-linked structure. Because it is insoluble in water but can quickly absorb water and swell, it is widely used as an excipient in tablets. Cross-linked polyvinylpyrrolidone has strong hygroscopicity. During the production process of cross-linked polyvinylpyrrolidone, it needs to be fully dried to ensure its hygroscopic properties.

[0003] In the Chinese patent application CN209415986U, a drying device for cross-linked polyvinylpyrrolidone is disclosed. The material passes through a diverter plate and is then sprayed out by a spray head, which is evenly distributed, not easy to stick together, and has a good drying effect. When the slurry just sprayed out from the spray head approaches the inner wall of the upper tower body, it is blown downward by the hot air sprayed from the vertically downward through hole, and cannot stick to the inner wall of the upper tower body. After the material blown downward is blown by the hot air, the surface is dry and not easy to stick to the inner wall. The inclined holes on the lower tower body allow the hot air to blow upward at an angle, thereby extending the falling time of the material and making it dry more thoroughly. However, the above technical solution still has shortcomings in actual use. In this technical solution, multiple inclined holes for guiding hot air are set in the drying tower, but only one air inlet channel is set outside the drying tower. It is difficult for the hot air to be discharged evenly from the inclined holes, resulting in uneven heating of the inner wall of the drying tower, affecting the drying effect of the cross-linked polyvinylpyrrolidone powder. Utility Model Content

[0004] The purpose of the utility model is to provide a drying device for cross-linked polyvinylpyrrolidone to solve the above-mentioned shortcomings in the technology.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A drying device for cross-linked polyvinylpyrrolidone comprises a drying cylinder, a cover body is provided on the top of the drying cylinder, an exhaust pipe is provided on one side of the bottom end of the drying cylinder, the drying cylinder is provided with a base, an air inlet pipe is provided in the middle of the base, one end of the air inlet pipe is connected to a hot air blower, and the other end is connected to an air jet pipe, the outer wall of the air jet pipe is provided with a plurality of air holes, an injection pipe is provided on one side of the top end of the drying cylinder, the end of the injection pipe is connected to a material pump, and the feed end of the material pump is connected to a feed pipe.

[0007] Preferably, a circulation fan is fixed to one side of the outer wall of the drying cylinder, the air outlet of the circulation fan is connected to the cylinder, the bottom of the cylinder is connected to a circulation air duct, and the end of the circulation air duct extends to the bottom of the drying cylinder.

[0008] Preferably, one end of the exhaust pipe is connected with a cyclone separator, the bottom of the cyclone separator is provided with a material collecting box, and the top of the cyclone separator is provided with an exhaust pipe.

[0009] Preferably, the bottom of the cover body is provided with a perforated plate, the top of the perforated plate is provided with a plurality of air holes, and the top of the cover body is provided with a high-pressure fan.

[0010] Preferably, one end of the spray pipe is provided with a collecting pipe, the bottom of the collecting pipe is provided with a connecting pipe, the end of the connecting pipe is connected with an air duct, and the extending end of the air duct is connected with an air outlet pipe.

[0011] Preferably, the end of the feeding pipe is connected with a material tank, the top of the material tank is provided with an air inlet, and the top of the material tank is also provided with a feeding port.

[0012] In the above technical solution, the technical effects and advantages of the present application are provided.

[0013] By setting the drying cylinder, a jet pipe is arranged in the middle of the drying cylinder, the outer wall of the jet pipe is uniformly provided with holes, hot air is continuously sent into the jet pipe through the external hot air fan and the air inlet pipe, the hot air is uniformly sprayed out of the jet pipe, the hot air is sprayed towards the inner wall of the drying cylinder, the cross-linked povidone powder is quickly dispersed by the sprayed hot air, and the cross-linked povidone powder is dispersed in the drying cylinder, which is beneficial to rapid drying, thereby effectively improving the drying effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments or prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0016] Figure 2 It is a sectional view of the drying cylinder and the base of the present application.

[0017] Figure 3 It is a schematic diagram of the structure of the spray pipe and the air duct of the present application.

[0018] Explanation of reference signs:

[0019] 1, drying cylinder; 2, orifice plate; 3, cover; 4, high-pressure fan; 5, injection pipe; 51, collecting pipe; 52, connecting pipe; 6, material pump; 7, feeding pipe; 8, material tank; 9, air inlet; 10, feeding port; 11, hot air blower; 12, air outlet pipe; 13, air duct; 14, air inlet pipe; 15, circulating fan; 16, cylinder; 17, circulating air pipe; 18, base; 19, exhaust pipe; 20, cyclone separator; 21, material collecting box; 22, exhaust pipe; 23, air injection pipe. DETAILED DESCRIPTION

[0020] In order for those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings.

[0021] The present application provides a drying device for cross-linked povidone as shown in Figure 1 - Figure 3 The drying device for cross-linked povidone comprises a drying cylinder 1, a cover 3 arranged at the top of the drying cylinder 1, an exhaust pipe 19 arranged at one side of the bottom end of the drying cylinder 1, a base 18 arranged on the drying cylinder 1, an air inlet pipe 14 arranged in the middle of the base 18, a hot air blower 11 connected to one end of the air inlet pipe 14, an air injection pipe 23 connected to the other end of the air inlet pipe 14, a plurality of air holes formed in the outer wall of the air injection pipe 23, an injection pipe 5 arranged at one side of the top end of the drying cylinder 1, a material pump 6 connected to the end of the injection pipe 5, and a feeding pipe 7 connected to the feeding end of the material pump 6.

[0022] As shown in Figure 1 - Figure 3 One side of the outer wall of the drying cylinder 1 is fixedly connected with a circulating fan 15, the air outlet of the circulating fan 15 is connected with a cylinder 16, the bottom of the cylinder 16 is connected with a circulating air pipe 17, and the end of the circulating air pipe 17 extends to the bottom of the drying cylinder 1.

[0023] After the cross-linked povidone powder enters the drying cylinder 1, the circulating fan 15 is started and the hot air blower 11 is turned off, the circulating fan 15 extracts the hot air in the drying cylinder 1, the cross-linked povidone powder is mixed in the hot air, the hot air enters the cylinder 16 through the circulating fan 15, then enters the circulating air pipe 17 after passing through the cylinder 16, and finally returns to the drying cylinder 1 through the circulating air pipe 17, after the air in the drying cylinder 1 circulates for several times, the cross-linked povidone powder is in a highly dispersed state and is dried by the hot air, so that the cross-linked povidone powder will not stick together, thereby achieving the drying purpose.

[0024] As shown in Figure 1 One end of the exhaust pipe 19 is connected with a cyclone separator 20, the bottom of the cyclone separator 20 is provided with a material collecting box 21, and the top of the cyclone separator 20 is provided with an exhaust pipe 22; the bottom of the cover 3 is provided with an orifice plate 2, a plurality of air holes are formed in the top of the orifice plate 2, and the top of the cover 3 is provided with a high-pressure fan 4.

[0025] After the crosslinked povidone powder is dried inside the drying cylinder 1, the hot air blower 11 and the circulating air blower 15 are turned off, and the high-pressure air blower 4 is started, which blows air into the inside of the cover body 3, the air passes through the perforated plate 2 and flows downward, a large amount of air flows downward and blows the dried crosslinked povidone powder to move downward and enter the exhaust pipe 19, the dust-containing air continuously passes through the exhaust pipe 19 and enters the cyclone separator 20, the cyclone separator 20 separates the crosslinked povidone powder, and the crosslinked povidone powder finally falls into the material collecting box 21, and the clean air is discharged from the exhaust pipe 22;

[0026] It should be noted that the cyclone separator 20 is a common solid particle separation device, which separates solid particles from gas by utilizing the rotational motion of cyclone and the principle of centrifugal force, and the cyclone separator 20 in the application can separate the crosslinked povidone powder in the air, so as to facilitate the collection of the dried crosslinked povidone powder.

[0027] As shown in Figure 3 , one end of the injection pipe 5 is provided with a collecting pipe 51, the bottom of the collecting pipe 51 is provided with a connecting pipe 52, the end of the connecting pipe 52 is connected with the air guide pipe 13, and the extension end of the air guide pipe 13 is connected with the air outlet pipe 12.

[0028] During the feeding process, the material pump 6 is started, the crosslinked povidone powder is sucked by the material pump 6, the crosslinked povidone powder is sucked into the collecting pipe 51 under the suction force of the material pump 6, at the same time, the air blown by the hot air blower 11 enters the collecting pipe 51 through the air guide pipe 13, the air pressure in the collecting pipe 51 is increased, the crosslinked povidone powder is affected by the air pressure and moves at a high speed along the injection pipe 5, and finally is sprayed into the drying cylinder 1, after the crosslinked povidone powder is sprayed into the drying cylinder 1, the crosslinked povidone powder is in a highly dispersed state.

[0029] As shown in Figure 1 , the end of the feeding pipe 7 is connected with the material tank 8, the top of the material tank 8 is provided with an air inlet 9 and a feeding port 10; before the drying operation, the crosslinked povidone powder is injected into the material tank 8 from the feeding port 10, and the end of the feeding pipe extends downward to the inside bottom of the material tank 8, so as to facilitate the extraction of the crosslinked povidone powder in the material tank 8.

[0030] The above only describes certain exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A drying device for cross-linked polyvinylpyrrolidone, characterized in that: The invention comprises a drying cylinder (1), wherein a cover body (3) is provided on the top of the drying cylinder (1), an exhaust pipe (19) is provided on one side of the bottom end of the drying cylinder (1), a base (18) is provided on the drying cylinder (1), an air inlet pipe (14) is provided in the middle of the base (18), one end of the air inlet pipe (14) is connected to a hot air blower (11), and the other end is connected to an air jet pipe (23), a plurality of air holes are provided on the outer wall of the air jet pipe (23), an injection pipe (5) is provided on one side of the top end of the drying cylinder (1), the end of the injection pipe (5) is connected to a material pump (6), and the feed end of the material pump (6) is connected to a feed pipe (7).

2. The drying device for cross-linked polyvinylpyrrolidone according to claim 1, wherein: A circulating fan (15) is fixed to one side of the outer wall of the drying cylinder (1); the air outlet of the circulating fan (15) is connected to the cylinder (16); the bottom of the cylinder (16) is connected to a circulating air duct (17); the end of the circulating air duct (17) extends to the bottom of the drying cylinder (1).

3. The drying device for cross-linked polyvinylpyrrolidone according to claim 1, wherein: One end of the exhaust pipe (19) is connected to a cyclone separator (20), a collecting box (21) is provided at the bottom of the cyclone separator (20), and an exhaust pipe (22) is provided at the top of the cyclone separator (20).

4. The drying device for cross-linked polyvinylpyrrolidone according to claim 1, wherein: A perforated plate (2) is provided at the bottom of the cover body (3), a plurality of air holes are opened at the top of the perforated plate (2), and a high-pressure blower (4) is provided at the top of the cover body (3).

5. The drying device for cross-linked polyvinylpyrrolidone according to claim 1, characterized in that: A collecting pipe (51) is provided at one end of the injection pipe (5), a connecting pipe (52) is provided at the bottom of the collecting pipe (51), an end of the connecting pipe (52) is connected to an air induction pipe (13), and an extended end of the air induction pipe (13) is connected to an air outlet pipe (12).

6. The drying device for cross-linked polyvinylpyrrolidone according to claim 1, characterized in that: The end of the feed pipe (7) is connected to a material tank (8), an air inlet (9) is provided on the top of the material tank (8), and a feed port (10) is also provided on the top of the material tank (8).

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