Low-pressure countercurrent spray granulation dryer

Abstract

The low-pressure countercurrent spray granulation drying machine comprises a top bin, a feeding bin and a flow guide cover, a first supporting seat is fixedly connected to the lower end of the interior of the top bin, a dust removal cloth bag is detachably connected to the bottom of the first supporting seat, and a second supporting seat is fixedly connected to the lower end of the interior of the feeding bin; the bottom of the flow guide cover is fixedly connected with an air inlet base, one side of the air inlet base is connected with a fan through a connecting pipe, the top of the top bin is connected with an air outlet pipe, the bottom of the air outlet pipe is connected with a flow dividing pipe, and the bottom of the flow dividing pipe is fixedly connected with the connecting pipe at the air outlet end of the fan. According to the granulator, the shunt pipe is arranged between the air outlet pipe and the air outlet end of the fan, the electromagnetic valve is closed in the early stage of granulation, internal pellets can be blown only by blowing air into equipment through the fan, and the electromagnetic valve is opened along with increase of the pellet forming weight in the later stage, so that air flows back, the air inlet amount is increased, the load of the fan is reduced, and meanwhile the granulation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of granulation equipment technology, specifically to a low-pressure countercurrent spray granulation dryer. Background Technology

[0002] In the process of drug production, in order to ensure that the internal components of the drug can reach the designated location in the intestine smoothly, protective layers such as enteric coating and drug coating need to be added to the outside of the drug pellets, which requires the use of a granulation dryer.

[0003] In existing technologies, most traditional granulators use a jet-type process, where high-pressure gas is sprayed from the bottom to lift the micro-pellets, and then liquid medicine is sprayed from the side nozzles to ensure that the liquid medicine adheres evenly and efficiently to the outside of the micro-pellets. Because the micro-pellets are small, while the particles in the later stages of granulation are larger and have different weights, the micro-pellets in the early stages of granulation are easily blown directly to the top, while they are difficult to lift in the later stages, resulting in poor granulation effect. To address this, a low-pressure countercurrent spray granulation and drying machine is provided. Utility Model Content

[0004] This invention aims to solve the above-mentioned technical problems by providing a low-pressure countercurrent spray granulation dryer.

[0005] The technical solution adopted by this utility model to solve the technical problem is: a low-pressure countercurrent spray granulation dryer, including a top chamber, a feeding chamber and a guide hood. A first support base is fixedly connected to the lower interior of the top chamber. A dust collector bag is detachably connected to the bottom of the first support base. A second support base is fixedly connected to the lower interior of the feeding chamber. A discharge filter plate is detachably connected to the bottom of the second support base. An air inlet base is fixedly connected to the bottom of the guide hood. A fan is connected to one side of the air inlet base through a connecting pipe. An air outlet pipe is connected to the top of the top chamber. A diverter pipe is connected to the bottom of the air outlet pipe. The bottom of the diverter pipe is fixedly connected to the connecting pipe at the air outlet end of the fan.

[0006] As a preferred technical solution of this utility model, the flanges at the bottom of the top compartment and the top of the guide shroud are both provided with air expansion sealing rings, and an air pipe is connected between the two air expansion sealing rings.

[0007] As a preferred embodiment of this utility model, a solenoid valve is fixedly connected to the top of the diversion pipe.

[0008] As a preferred technical solution of this utility model, two triangular mounting plates are fixedly connected to each other on both sides of the outer wall of the top hopper. The bottom of the two triangular mounting plates is provided with a slide rail. An I-shaped slider is slidably connected inside the slide rail. A rotating shaft that is fixedly connected to the feeding hopper is rotatably connected inside the I-shaped slider.

[0009] As a preferred embodiment of this utility model, the slide rail is internally rotatably connected to a lead screw, the lead screw is threadedly connected to the I-shaped slider, and the lead screw is misaligned with the rotating shaft.

[0010] As a preferred embodiment of this utility model, the mesh diameter of the dust collector bag and the mesh diameter of the discharge filter plate are both smaller than the diameter of the granulated micro-pellets.

[0011] This utility model has the following advantages: The granulator is equipped with a diversion pipe between the air outlet pipe and the air outlet end of the blower. In the early stage of granulation, the solenoid valve is closed, and the internal micro-particles can be blown by the blower. In the later stage, as the weight of the micro-particles increases, the solenoid valve is opened, which allows the gas to flow back, increases the air intake, reduces the load on the blower, and improves the granulation effect. The feeding bin and the top bin are connected by a triangular mounting plate, and the feeding bin can be easily removed by sliding and rotating, which facilitates the feeding and discharging of materials. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the test cross-section structure of a preferred embodiment of the present invention;

[0013] Figure 2 This is a three-dimensional structural schematic diagram of a preferred embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the connection structure of the triangular mounting plate according to a preferred embodiment of the present invention.

[0015] Explanation of reference numerals in the attached diagram: 1. Top bin; 2. Feeding bin; 3. Flow guide hood; 4. Air inlet base; 5. Fan; 6. Air outlet pipe; 7. Diverter pipe; 8. Solenoid valve; 9. Support No. 1; 10. Dust collector bag; 11. Support No. 2; 12. Feeding filter plate; 13. Triangular mounting plate; 14. Slide rail; 15. I-shaped slider; 16. Rotating shaft; 17. Lead screw; 18. Air expansion sealing ring; 19. Air pipe. Detailed Implementation

[0016] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or 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 construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Please refer to the following: Figure 1-3 This utility model discloses a low-pressure countercurrent spray granulation dryer, comprising a top chamber 1, a feeding chamber 2, and a guide hood 3. A first support base 9 is fixedly connected to the lower interior of the top chamber 1, and a dust collector bag 10 is detachably connected to the bottom of the first support base 9. A second support base 11 is fixedly connected to the lower interior of the feeding chamber 2, and a discharge filter plate 12 is detachably connected to the bottom of the second support base 11. An air inlet base 4 is fixedly connected to the bottom of the guide hood 3, and a fan 5 is connected to one side of the air inlet base 4 via a connecting pipe. An air outlet pipe 6 is connected to the top of the top chamber 1, and a diverter pipe 7 is connected to the bottom of the air outlet pipe 6. The bottom of the diverter pipe 7 is fixedly connected to the connecting pipe at the air outlet end of the fan 5.

[0020] Both the bottom of the top hopper 1 and the top of the guide shroud 3 are equipped with air-expanding sealing rings 18. An air pipe 19 connects the two air-expanding sealing rings 18. The air pipe 19 inflates and deflates the two air-expanding sealing rings 18, facilitating the sealing of the upper and lower ends of the feeding hopper 2. A solenoid valve 8 is fixedly connected to the top of the diversion pipe 7. The opening and closing of the solenoid valve 8 controls the gas backflow of the outlet pipe 6, increasing the air intake of the air intake base 4. Two triangular mounting plates 13 are fixedly connected to the two sides of the outer wall of the top hopper 1. The bottom of the two triangular mounting plates 13 is carved with a slide rail 14, and the interior of the slide rail 14 is slidably connected. There is an I-shaped slider 15, and the inside of the I-shaped slider 15 is rotatably connected to a rotating shaft 16 that is fixedly connected to the feeding bin 2. By sliding the I-shaped slider 15, the feeding bin 2 can be easily removed from between the top bin 1 and the guide hood 3. The rotation of the rotating shaft 16 makes it easy to tilt the feeding bin 2 for easy discharge. The inside of the slide 14 is rotatably connected to a lead screw 17. The lead screw 17 is threadedly connected to the I-shaped slider 15 and the lead screw 17 is misaligned with the rotating shaft 16. The mesh diameter of the dust collector bag 10 and the mesh diameter of the discharge filter plate 12 are both smaller than the diameter of the granulated micro pellets to prevent the micro pellets from falling out of the feeding bin 2 or flowing out with the gas.

[0021] Specifically, when using this utility model, the lead screw 17 is rotated, and as the lead screw 17 rotates, the feeding bin 2 is taken out from between the top bin 1 and the guide hood 3, and the micro-pellets to be granulated are put in. After the feeding bin 2 is retracted, air is injected into the two air-expansion sealing rings 18 through the air pipe 19 to seal both ends of the feeding bin 2. The blower 5 is turned on and the solenoid valve 8 is closed. The blower 5 blows high-pressure air into the guide hood 3 through the air inlet base 4, blowing up the micro-pellets on the discharge filter plate 12. Then, the coating liquid is sprayed into the spray nozzle of the equipment. The rapidly moving coating liquid quickly combines with the micro-pellets, and the micro-pellets gradually become heavier. The solenoid valve 8 is turned on, and part of the high-pressure air flowing out from the top flows back through the diversion pipe 7. In conjunction with the blower 5, the wind speed is increased, and the granulation effect in the later stage is improved.

[0022] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0023] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A low-pressure counter-flow spray granulation dryer, characterized by, Including top warehouse (1), feeding bin (2) and fairwater (3), the inside lower end of the top warehouse (1) is fixedly connected with a first support seat (9), the bottom of the first support seat (9) is detachably connected with a dust removal cloth bag (10), the inside lower end of the feeding bin (2) is fixedly connected with a second support seat (11), the bottom of the second support seat (11) is detachably connected with a discharging filter plate (12), the bottom of the fairwater (3) is fixedly connected with an air inlet base (4), one side of the air inlet base (4) is connected with a fan (5) through a connecting pipe, the top of the top warehouse (1) is connected with an air outlet pipe (6), the bottom of the air outlet pipe (6) is connected with a shunt pipe (7), and the bottom of the shunt pipe (7) is fixedly connected with the connecting pipe of the air outlet end of the fan (5).

2. A low pressure countercurrent spray prilling dryer as claimed in claim 1, characterized in that, The flange plates at the bottom of the top warehouse (1) and the top of the fairwater (3) are provided with air inflation sealing rings (18), and the air inflation sealing rings (18) are connected with air pipes (19).

3. A low pressure countercurrent spray prilling dryer as claimed in claim 1, wherein, The top of the shunt pipe (7) is fixedly connected with an electromagnetic valve (8).

4. A low pressure countercurrent spray prilling dryer as claimed in claim 1, wherein, The outer wall of the top warehouse (1) is fixedly connected with two triangular mounting plates (13) on both sides, and the bottom of the two triangular mounting plates (13) is provided with a slide (14), the inside of the slide (14) is slidably connected with an I-shaped sliding block (15), and the inside of the I-shaped sliding block (15) is rotatably connected with a rotating shaft (16) fixedly connected with the feeding bin (2).

5. A low pressure countercurrent spray prilling dryer as claimed in claim 4, characterized in that, The inside of the slide (14) is rotatably connected with a lead screw (17), the lead screw (17) is threadedly connected with the I-shaped sliding block (15), and the lead screw (17) is dislocated with the rotating shaft (16).

6. A low pressure countercurrent spray prilling dryer as claimed in claim 1, wherein, The mesh diameter of the dust removal cloth bag (10) and the mesh diameter of the discharging filter plate (12) are smaller than the diameter of the granulated micro-pellets.

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