Pneumatic drying device

Abstract

The utility model discloses an airflow drying device, and relates to the technical field of airflow drying. The airflow drying device comprises an air filter, a heater is fixedly installed at the output end of the air filter, an extraction air pump is fixedly installed at the other end of the heater, a drying box is fixedly installed at the other end of the extraction air pump, a material pretreatment device is fixedly installed at the top end of the drying box, and a conveying air pump is fixedly installed on the other side of the drying box. According to the airflow drying device, the material pretreatment device is arranged, materials can be smashed through smashing rollers in the smashing box body, and the smashed materials can be screened through a drawing screen and a guiding screen; and a conveying auger in the backflow cylinder is matched, so that the materials which most accord with the filtering rule can be fed into the crushing box body again for secondary filtering, and the materials are crushed before being dried.

Description

Technical Field

[0001] The utility model relates to the technical field of airflow drying, in particular to an airflow drying device. Background Art

[0002] As we all know, airflow drying device uses the rapid movement of hot air to drive wet materials and suspend them in the hot air. It has the characteristics of high heat transfer coefficient, large heat transfer area and short drying time. Airflow drying, also known as "instant drying", is the application of dilute phase conveying in solid fluidization in drying. This method makes the heating medium and the solid particles to be dried directly contact, and suspends the solid particles to be dried in the fluid. Therefore, the contact area between the two phases is large, which strengthens the heat and mass transfer process. It is widely used in the drying unit operation of bulk materials.

[0003] After searching, it is proposed in a pneumatic drying device with patent publication number CN220793748U that "the utility model monitors the temperature in the drying tube by arranging a temperature sensor on the side wall of the drying tube, which can facilitate the controller to control the temperature, improves the air heating efficiency by arranging a heating tube on the inner wall of the drying tube, improves the drying efficiency by arranging a convergence tube on the drying tube, and circulates the heated air by connecting the exhaust pipe with the intake pipe, which can reduce heating energy consumption and improve the heat cycle efficiency";

[0004] However, the above scheme still has certain shortcomings in actual use. In this scheme, multiple equipments are used to dry the moisture in the material through a process flow, and an auger conveyor is used to convey the material into the drying tube. However, the auger conveyor does not have a crushing function, resulting in a large volume of the material before entering the drying tube. Large-volume materials are not convenient for drying, which will affect the drying effect of the airflow drying device. Utility Model Content

[0005] The utility model provides an airflow drying device to solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an airflow drying device, comprising an air filter, a heater is fixedly installed at the output end of the air filter, an extraction air pump is fixedly installed at the other end of the heater, a drying box is fixedly installed at the other end of the extraction air pump, a material pretreatment device is fixedly installed at the top of the drying box, a conveying air pump is fixedly installed at the other side of the drying box, a cyclone separator is fixedly installed at the other end of the conveying air pump, and a collection box and a bag dust collector are fixedly installed at the bottom and top of the cyclone separator respectively;

[0007] The material pretreatment device comprises a crushing box and a reflux cylinder, the bottom end of the crushing box is connected to the interior of the drying box, the crushing box is connected to the reflux cylinder, and the top end of the crushing box is hinged with a sealing plate;

[0008] The inner wall of the crushing box is provided with two crushing rollers, and the inner wall of the crushing box is provided with two pull-out screens and a guide screen;

[0009] The inner wall of the reflux cylinder is rotatably connected to a conveying auger via a built-in motor, and the side of the reflux cylinder is fixedly connected to a guide pipe.

[0010] Furthermore, the air filter, heater, extraction air pump, drying box, delivery air pump, cyclone separator, collection box and bag filter are all connected through sealed pipes.

[0011] Furthermore, an external plate is fixedly installed on the outside of the crushing box, and a transmission structure is fixedly installed on the top of the external plate. The transmission structure includes an external motor and a transmission shaft. The external motor and the transmission shaft are connected by a transmission chain, and the movable ends of the external motor and the transmission shaft are respectively fixedly connected to the two crushing rollers.

[0012] Furthermore, a socket is fixedly connected to the inner wall of the pulverizing box, and the side end of the pull-out screen is movably plugged into the inner wall of the socket.

[0013] Furthermore, the two pull-out screens and the guide screen are arranged in sequence from top to bottom, and the filtering accuracy of the two pull-out screens and the guide screen is gradually improved from top to bottom.

[0014] Compared with the prior art, the utility model provides an airflow drying device, which has the following beneficial effects:

[0015] The airflow drying device is provided with a material pretreatment device, and the crushing roller inside the crushing box can be used to crush the material, and the pull-out screen and the guide screen can be used to screen the crushed material. The conveying auger inside the reflux cylinder can then be used to send the material that best meets the filtering rules into the crushing box for secondary filtration, so that the material is crushed before being dried, so that the crushed material can be easily dried, thereby ensuring the drying effect of the airflow drying device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of a material pretreatment device of the utility model;

[0018] Figure 3This is a cross-sectional view of the crushing box of the utility model;

[0019] Figure 4 It is a cross-sectional view of the reflux tube of the utility model.

[0020] In the figure: 1. air filter; 2. heater; 3. extraction air pump; 4. drying box; 5. material pretreatment device; 501. crushing box; 502. reflux cylinder; 503. sealing plate; 504. external plate; 505. transmission structure; 506. crushing roller; 507. socket; 508. pull-out screen; 509. guide screen; 510. built-in motor; 511. conveying auger; 512. outlet pipe; 6. conveying air pump; 7. cyclone separator; 8. collection box; 9. bag filter. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model discloses an airflow drying device, including an air filter 1, a heater 2 is fixedly installed on the output end of the air filter 1, an extraction air pump 3 is fixedly installed on the other end of the heater 2, a drying box 4 is fixedly installed on the other end of the extraction air pump 3, a material pretreatment device 5 is fixedly installed on the top of the drying box 4, a conveying air pump 6 is fixedly installed on the other side of the drying box 4, a cyclone separator 7 is fixedly installed on the other end of the conveying air pump 6, and a collecting box 8 and a bag dust collector 9 are fixedly installed on the bottom and top of the cyclone separator 7 respectively.

[0023] The process flow of the air filter 1, heater 2, extraction air pump 3, drying box 4, cyclone separator 7, collection box 8 and bag dust collector 9 has been proposed in an airflow drying device with patent publication number CN220793748U, and will not be described in detail here.

[0024] The material pretreatment device 5 includes a crushing box 501 and a reflux cylinder 502. The bottom end of the crushing box 501 is connected to the interior of the drying box 4. The crushing box 501 is connected to the reflux cylinder 502. The top end of the crushing box 501 is hinged with a sealing plate 503.

[0025] The inner wall of the pulverizing box 501 is provided with two pulverizing rollers 506 , and the inner wall of the pulverizing box 501 is provided with two pull-out screens 508 and a guide screen 509 ;

[0026] The inner wall of the reflux cylinder 502 is rotatably connected to a conveying auger 511 via a built-in motor 510 , and a side surface of the reflux cylinder 502 is fixedly connected to a delivery pipe 512 .

[0027] By setting up the material pretreatment device 5, the crushing roller 506 inside the crushing box 501 can be used to crush the material, and the pull-out screen 508 and the guide screen 509 can be used to screen the crushed material. In combination with the conveying auger 511 inside the reflux cylinder 502, the material that best meets the filtering rules can be sent back into the crushing box 501 for secondary filtration, so that the material is crushed before being dried, so that the crushed material can be easily dried, thereby ensuring the drying effect of the airflow drying device.

[0028] Specifically, the air filter 1, the heater 2, the extraction air pump 3, the drying box 4, the delivery air pump 6, the cyclone separator 7, the collection box 8 and the bag filter 9 are all connected through a sealed pipe.

[0029] In this embodiment, the air filter 1, the heater 2, the extraction air pump 3, the drying box 4, the delivery air pump 6, the cyclone separator 7, the collection box 8 and the bag filter 9 can be effectively sealed and connected by using a sealing tube.

[0030] Specifically, an external plate 504 is fixedly installed on the outside of the crushing box 501, and a transmission structure 505 is fixedly installed on the top of the external plate 504. The transmission structure 505 includes an external motor and a transmission shaft. The external motor and the transmission shaft are connected by a transmission chain, and the movable ends of the external motor and the transmission shaft are fixedly connected to two crushing rollers 506 respectively.

[0031] In this embodiment, the external motor housing is used to drive the transmission shaft to rotate through a transmission chain, thereby causing the two crushing rollers 506 to rotate synchronously.

[0032] Specifically, the inner wall of the pulverizing box 501 is fixedly connected with a socket 507 , and the side end of the pull-out screen 508 is movably plugged into the inner wall of the socket 507 .

[0033] In this embodiment, the plug-in socket 507 can be used to position the pull-out screen 508 and the inner wall of the pulverizing box 501 .

[0034] Specifically, the two pull-out screens 508 and the guide screen 509 are arranged in sequence from top to bottom, and the filtering accuracy of the two pull-out screens 508 and the guide screen 509 is gradually improved from top to bottom.

[0035] In this embodiment, the two pull-out screens 508 and the guide screen 509 can be used to filter the crushed material step by step.

[0036] When in use, the material needs to be poured into the crushing box 501 in advance, and then the two crushing rollers 506 are started through the transmission structure 505, so that the two crushing rollers 506 begin to crush the material, and then the crushing rollers 506 will fall on the upper pull-out screen 508, and the material that meets the filtering rule of the upper pull-out screen 508 will fall on the lower pull-out screen 508, and the material that meets the filtering rule of the lower pull-out screen 508 will fall on the guide screen 509;

[0037] The materials remaining on the upper and lower pull-out screens 508 can be taken out of the crushing box 501 by pulling the two pull-out screens 508, so that the staff can recycle the materials.

[0038] The materials that meet the filtering rules of the guide screen 509 will pass through the guide screen 509 and enter the drying box 4, while the materials that do not meet the filtering rules of the guide screen 509 will follow the direction of the guide screen 509 and enter the reflux cylinder 502. Then, the conveying auger 511 is started by the built-in motor 510, so that the conveying auger 511 drives the materials that meet the filtering rules the most to be sent into the crushing box 501 again for secondary filtration.

[0039] When the material completely enters the drying box 4, the extraction air pump 3 is started to cause the extraction air pump 3 to draw the outside air into the air filter 1 for air purification, and then the purified gas is drawn into the heater 2 for heating treatment, and then the heated gas is injected into the drying box 4;

[0040] After the hot air enters the drying box 4, it starts to heat and dry the material, and blows the dried material apart to separate it into powder. Then the powdered material is taken up, and the material is conveyed from the drying box 4 into the cyclone separator 7 through the conveying air pump 6. The cyclone separator 7 separates the hot air from the powdered material. The powdered material falls to the bottom of the cyclone separator 7 and into the collecting box 8, while the hot air is discharged from the top of the cyclone separator 7, and then enters the bag dust collector 9 for filtration and dust removal and is finally discharged to the outside.

[0041] In summary, the airflow drying device, by setting up the material pretreatment device 5, can use the crushing roller 506 inside the crushing box 501 to crush the material, and the pull-out screen 508 and the guide screen 509 can screen the crushed material, and then cooperate with the conveying auger 511 inside the reflux cylinder 502 to send the material that best meets the filtering rules into the crushing box 501 again for secondary filtration, so that the material is crushed before drying, so that the crushed material can be easily dried, thereby ensuring the drying effect of the airflow drying device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An airflow drying device, comprising an air filter (1), characterized in that: A heater (2) is fixedly mounted on the output end of the air filter (1); an extraction air pump (3) is fixedly mounted on the other end of the heater (2); a drying box (4) is fixedly mounted on the other end of the extraction air pump (3); a material pretreatment device (5) is fixedly mounted on the top of the drying box (4); a conveying air pump (6) is fixedly mounted on the other side of the drying box (4); a cyclone separator (7) is fixedly mounted on the other end of the conveying air pump (6); a material collecting box (8) and a bag dust collector (9) are fixedly mounted on the bottom and top of the cyclone separator (7), respectively; The material pretreatment device (5) comprises a crushing box (501) and a reflux cylinder (502); the bottom end of the crushing box (501) is connected to the interior of the drying box (4); the crushing box (501) is connected to the reflux cylinder (502); and the top end of the crushing box (501) is hinged with a sealing plate (503); The inner wall of the pulverizing box (501) is provided with two pulverizing rollers (506), and the inner wall of the pulverizing box (501) is provided with two pull-out screens (508) and a guide screen (509); The inner wall of the reflux cylinder (502) is rotatably connected to a conveying auger (511) via a built-in motor (510), and a side surface of the reflux cylinder (502) is fixedly connected to a delivery pipe (512).

2. The airflow drying device according to claim 1, characterized in that: The air filter (1), the heater (2), the extraction air pump (3), the drying box (4), the delivery air pump (6), the cyclone separator (7), the collection box (8) and the bag dust collector (9) are all connected via a sealed pipe.

3. The airflow drying device according to claim 1, characterized in that: An external plate (504) is fixedly mounted on the outside of the pulverizing box (501), and a transmission structure (505) is fixedly mounted on the top of the external plate (504). The transmission structure (505) comprises an external motor and a transmission shaft. The external motor and the transmission shaft are connected to each other via a transmission chain, and the movable ends of the external motor and the transmission shaft are respectively fixedly connected to two pulverizing rollers (506).

4. The airflow drying device according to claim 1, characterized in that: The inner wall of the pulverizing box (501) is fixedly connected with a plug-in seat (507), and the side end of the pull-out screen (508) is movably plugged into the inner wall of the plug-in seat (507).

5. The airflow drying device according to claim 1, characterized in that: The two pull-out screens (508) and the guide screen (509) are arranged in sequence from top to bottom, and the filtering accuracy of the two pull-out screens (508) and the guide screen (509) increases step by step from top to bottom.

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