Air flow heating vacuum drying system

Abstract

The utility model discloses an airflow heating vacuum drying system which comprises a vacuum drying machine, and the vacuum drying machine is provided with a machine body; the tank body is rotationally mounted on the machine body, an interlayer space is formed in the side wall of the tank body, a feeding cover is detachably arranged at the upper end of the tank body, and a discharging cover is detachably arranged at the lower end of the tank body; the exhaust pipe is rotationally arranged on the side wall of the tank body in a penetrating manner and extends into the tank body, and the exhaust pipe is provided with a downward inlet end; the filter assembly comprises a mounting pipe, a filter housing and a mounting rod which are sequentially connected, one end of the mounting pipe is inserted into the inlet end of the exhaust pipe, the other end of the mounting pipe is communicated with the filter housing, and the end part of the mounting rod extends to the discharge cover. According to the structure, after the discharging cover is disassembled, the mounting rod can be conveniently contacted, so that the filtering assembly can be conveniently taken down and mounted by operating the mounting rod. Therefore, the filtering cover shell can be conveniently cleaned in a manner of detaching the tank body, so that the filtering cover shell is convenient to clean.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to a vacuum drying system. Background Technology

[0002] In the production of some biochemical products (such as pepsin, pancreatin, and gastric mucin), a drying step is required to remove liquid from the products. Since these products are easily deactivated at high temperatures, vacuum drying can be used to quickly remove liquid at lower temperatures and avoid high-temperature deactivation.

[0003] Common vacuum drying systems primarily use a double-cone rotary vacuum dryer, supplemented by a steam generator, steam piping, and other components. The double-cone rotary vacuum dryer has a frame and a tank rotatably mounted on the frame. The tank wall has a jacket, and the tank is equipped with an exhaust pipe connected to a vacuum pump. The steam generator is connected to the jacket via a steam pipe. During operation, materials are placed into the tank. Steam generated by the steam generator is transported via the steam pipe to the jacket of the tank (the steam generator can also supply steam to other tank equipment requiring heating, such as digesters and reaction vessels). The heat of the steam flow heats the materials inside the tank. Steam exiting the jacket is recovered via the steam pipe for cooling or reheating. The vacuum pump, when activated, expels gas from the tank to maintain low pressure within the pipes, lowering the boiling point of the liquid and promoting boiling and evaporation at a lower temperature. To prevent products from entering the exhaust pipe, a filter cover is fixedly installed at the inlet end of the exhaust pipe. The filter cover has filter holes that allow airflow but prevent product powder from passing through.

[0004] After production is completed, the inside of the tank needs to be cleaned to remove any remaining product powder. Some filter pores of the filter housing may retain product powder, so the filter housing itself is also within the cleaning scope. However, the filter housing is usually far from the material inlet and outlet of the tank, making it difficult for cleaning or disassembly tools to reach it. This makes direct cleaning or disassembly inconvenient and reduces cleaning efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum drying system with airflow heating, which can solve the problem of inconvenient cleaning of the filter housing.

[0006] To achieve the above objectives, a vacuum drying system with airflow heating is provided, comprising a vacuum dryer, the vacuum dryer comprising: a machine body; a tank rotatably mounted on the machine body, the tank having a double-layered space in its side wall, a detachable feed cover at the upper end of the tank and a detachable discharge cover at the lower end; an exhaust pipe rotatably passing through the side wall of the tank and extending into the tank, the exhaust pipe having a downward-facing inlet end; and a filter assembly comprising a mounting pipe, a filter housing, and a mounting rod connected in sequence, one end of the mounting pipe being inserted into the inlet end of the exhaust pipe and the other end communicating with the filter housing, the end of the mounting rod extending to the discharge cover.

[0007] According to the aforementioned airflow-heated vacuum drying system, the mounting tube and mounting rod are arranged coaxially, the discharge cover is provided with a slot, and the end of the mounting rod is located in the slot.

[0008] According to the aforementioned airflow heating vacuum drying system, a top plate is slidably disposed at the bottom of the slot, and a screw is rotatably disposed at the bottom of the top plate, the screw being threadedly fitted through the discharge cover.

[0009] According to the aforementioned airflow heating vacuum drying system, the inlet end of the exhaust pipe is provided with a positioning ring adapted to the mounting pipe, the mounting pipe is inserted into the positioning ring, and an annular platform is fixed on the outer side wall of the mounting pipe below the positioning ring. A sealing groove is formed around the mounting pipe on the top surface of the annular platform, and a sealing ring is fitted in the sealing groove.

[0010] According to the aforementioned airflow-heated vacuum drying system, the inner diameter of the positioning ring is smaller than the inner diameter of the mounting tube. The mounting tube is slidably inserted into the positioning ring, and an anti-detachment structure is provided on the top of the positioning ring. The anti-detachment structure includes a cylindrical shell, a limiting head, and a spring. The cylindrical shell is fixedly inserted into the side wall of the mounting tube, the limiting head is slidably inserted into the cylindrical shell, and the limiting head has a hemispherical head extending out of the cylindrical shell. The spring is disposed inside the cylindrical shell and presses against the limiting head.

[0011] According to the aforementioned airflow-heated vacuum drying system, the inner wall of the positioning ring has an internal thread to accommodate a threaded mounting pipe inserted into the positioning ring.

[0012] According to the aforementioned airflow-heated vacuum drying system, both the inlet cover and the outlet cover are detachably connected to the tank body via a flange structure.

[0013] Beneficial effects: As described above, since the end of the mounting rod extends to the discharge cover, it is easily accessible after the discharge cover is removed, facilitating the removal and installation of the filter assembly by operating the mounting rod. This allows for convenient cleaning of the filter housing by removing it from the tank, making cleaning the filter housing easier.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a structural diagram of the vacuum dryer according to an embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of the tank in an embodiment of the present utility model;

[0018] Figure 3 for Figure 2 An enlarged view of part A shown in the diagram;

[0019] Figure 4 This is a cross-sectional view of the tank body in another embodiment of the present invention;

[0020] Figure 5 This is a simplified structural diagram of an embodiment of the present utility model. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Reference Figure 1-5 A vacuum drying system using airflow heating includes a vacuum dryer 10, a steam generator 20, and a steam pipe 30. The vacuum dryer 10 comprises a body 11, a tank 12, an exhaust pipe 13, and a filter assembly 14. The tank 12 is rotatably mounted on the body 11. The side wall of the tank 12 has a double-layered space. A feed cover 15 is detachably installed at the upper end of the tank 12, and a discharge cover 16 is detachably installed at the lower end of the tank 12. A partition 121 is provided in the double-layered space, dividing the space into a heating chamber 122 and a reflux chamber 123. An air inlet pipe 124 and a reflux channel 125 are provided on one side of the tank 12. The air inlet pipe 124 is connected to the heating chamber 122 and the steam pipe 30, respectively, and the reflux channel 125 is connected to the reflux chamber 123 and the steam pipe 30, respectively. The exhaust pipe 13 is rotatably inserted through the side wall of the tank 12 and extends into the tank 12, and the exhaust pipe 13 has a downward-facing inlet end. The filter assembly 14 includes a mounting pipe 141, a filter housing 142 and a mounting rod 143 connected in sequence. One end of the mounting pipe 141 is inserted into the inlet end of the exhaust pipe 13, and the other end of the mounting pipe 141 communicates with the filter housing 142. The end of the mounting rod 143 extends to the discharge cover 16.

[0026] Steam generator 20 is installed within the factory area, and the steam it generates supplies steam to equipment that needs to be heated (such as the tank 12 of vacuum dryer 10, digestion tank, reaction tank, etc.). Equipment that needs to be heated does not need to be equipped with a separate steam generator. During operation, the discharge cover 16 is removed, the filter assembly 14 is inserted into the inlet end of the exhaust pipe 13, the discharge cover 16 is installed and closed, the feed cover 15 is removed and the product to be dried is added into the tank 12, and the feed cover 15 is installed and closed. The steam flow generated by steam generator 20 flows sequentially through steam pipe 30, air inlet pipe 124, heating chamber 122, reflux chamber 123 and reflux channel 125. The motor and vacuum pump 18 on vacuum dryer 10 operate, driving the tank 12 to rotate and extracting the gas inside the tank 12. After drying, the discharge cover 16 is removed to release the product; then the mounting rod 143 is operated to move the mounting tube 141 away from the inlet end of the exhaust pipe 13, so that the filter assembly 14 can be removed to clean the product powder remaining in the filter holes of the filter cover 142.

[0027] As described above, since the end of the mounting rod 143 extends to the discharge cover 16, the mounting rod 143 can be easily accessed after the discharge cover 16 is removed, making it easy to remove and install the filter assembly 14 by operating the mounting rod 143. Thus, the filter housing 142 can be cleaned relatively easily by removing it from the tank 12, making cleaning of the filter housing 142 more convenient.

[0028] In this embodiment, the mounting tube 141 and the mounting rod 143 are arranged coaxially, and a slot 161 is provided on the discharge cover 16, with the end of the mounting rod 143 located in the slot 161. This structure allows the end of the mounting rod 143 near the discharge cover 16 to be positioned, preventing it from swinging or shifting, thus stabilizing the filter assembly 14 within the tank 12.

[0029] In this embodiment, a top plate 162 is slidably disposed at the bottom of the slot 161, and a screw 163 is rotatably disposed at the bottom of the top plate 162. The screw 163 is threadedly fitted through the discharge cover 16. By turning the screw 163, the top plate 162 can be driven to move up and down. The top plate 162 presses against the mounting rod 143, compensating for the distance difference between the bottom of the mounting rod 143 and the bottom surface of the slot 161, and preventing the filter assembly 14 from loosening and shifting longitudinally.

[0030] In this embodiment, a positioning ring 131 adapted to the mounting pipe 141 is provided at the inlet end of the exhaust pipe 13. The positioning ring 131 is coaxially arranged with the inlet end of the exhaust pipe 13. The inner diameter of the positioning ring 131 is smaller than the inner diameter of the mounting pipe 141, and the outer diameter of the positioning ring 131 is the same as the outer diameter of the exhaust pipe 13, so that the outer wall of the positioning ring 131 is flush with the outer wall of the exhaust pipe 13, thereby reducing the cleaning dead corners inside the tank 12. The mounting pipe 141 is inserted into the positioning ring 131, and a ring platform 1411 is fixed on the outer wall of the mounting pipe 141. The ring platform 1411 is located below the positioning ring 131. A sealing groove is formed around the mounting pipe 141 on the top surface of the ring platform 1411, and a sealing ring 1412 is fitted in the sealing groove. When the filter assembly 14 is installed, the ring platform 1411 abuts against the positioning ring 131. The sealing ring 1412 can seal the exhaust pipe 13 and the filter assembly 14 to prevent air leakage. The ring platform 1411 and the positioning ring 131 have a large width, which can accommodate and press the thicker sealing ring 1412 between them to ensure the sealing effect.

[0031] Reference Figure 2-3In one embodiment, the inner wall of the positioning ring 131 is smooth, the mounting tube 141 is slidably inserted into the positioning ring 131, and the mounting tube 141 is provided with an anti-detachment structure 17, which is located at the top of the positioning ring 131. Specifically, the anti-detachment structure 17 includes a cylindrical shell 171, a limiting head 172, and a spring member 173. The cylindrical shell 171 is fixedly inserted into the side wall of the mounting tube 141, the limiting head 172 is slidably inserted into the cylindrical shell 171, and the limiting head 172 has a hemispherical head extending out of the cylindrical shell 171. The spring member 173 is disposed inside the cylindrical shell 171 and abuts against the limiting head 172. During installation, the installation tube 141 is inserted into the positioning ring 131. After the anti-detachment structure 17 moves to the top of the positioning ring 131, the spring 173 pushes the limiting head 172 to extend, and the hemispherical head abuts against the inner edge of the top of the positioning ring 131 to initially position the filter assembly 14. At this time, it is not necessary to hold it by hand to prevent the filter assembly 14 from falling off, thus avoiding the situation where the filter assembly 14 falls off without being held by hand, so as to facilitate the disassembly and assembly of the discharge cover 16. After installing the discharge cover 16, tightening the screw 163 can make the ring platform 1411 and the positioning ring 131 press the sealing ring 1412. During disassembly, pulling down the installation rod 143 can compress the hemispherical head back into the cylinder shell 171 so as to remove the filter assembly 14.

[0032] Reference Figure 4 In another embodiment, the inner wall of the positioning ring 131 has an internal thread, and the outer wall of the mounting tube 141 has an external thread that mates with it, so that the mounting tube 141 is threadedly inserted into the positioning ring 131. In this structure, by turning the mounting rod 143, the ring platform 1411 and the positioning ring 131 can be pressed against the sealing ring 1412, preventing the filter assembly 14 from falling off, and the top plate 162 pressing against the mounting rod 143 can prevent it from loosening and shifting longitudinally.

[0033] In this embodiment, both the feed cover 15 and the discharge cover 16 are detachably connected to the tank body 12 via a flange structure.

[0034] It should be noted that the vacuum dryer 10 described in the above scheme can adopt the structure of a double cone rotary vacuum dryer. The installation structure and working method of its motor, vacuum pump 18, etc. are familiar to those skilled in the art. The pipe connection method for steam flow into and out of the interlayer space is also familiar to those skilled in the art, and will not be described in detail here.

[0035] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A vacuum drying system heated by airflow, characterized in that, Includes a vacuum dryer, wherein the vacuum dryer is equipped with: Organism; The tank body is rotatably mounted on the machine body. The side wall of the tank body has a sandwich space. The upper end of the tank body is detachably equipped with a feed cover, and the lower end is detachably equipped with a discharge cover. An exhaust pipe is rotatably installed through the side wall of the tank and extends into the tank body, and the exhaust pipe has a downward-facing inlet end; The filter assembly includes an installation tube, a filter housing, and an installation rod connected in sequence. One end of the installation tube is inserted into the inlet end of the exhaust pipe, and the other end is connected to the filter housing. The end of the installation rod extends to the discharge cover.

2. The vacuum drying system with airflow heating according to claim 1, characterized in that, The mounting tube and mounting rod are arranged coaxially, and the discharge cover is provided with a slot, with the end of the mounting rod located in the slot.

3. The vacuum drying system with airflow heating according to claim 2, characterized in that, A top plate is slidably disposed at the bottom of the slot, and a screw is rotatably disposed at the bottom of the top plate. The screw is threadedly fitted onto the discharge cover.

4. A vacuum drying system with airflow heating according to claim 1, 2, or 3, characterized in that, The inlet end of the exhaust pipe is provided with a positioning ring adapted to the mounting pipe. The mounting pipe is inserted into the positioning ring, and an annular platform is fixed on the outer side wall of the mounting pipe below the positioning ring. A sealing groove is opened around the mounting pipe on the top surface of the annular platform, and a sealing ring is inserted in the sealing groove.

5. The vacuum drying system with airflow heating according to claim 4, characterized in that, The inner diameter of the positioning ring is smaller than the inner diameter of the mounting tube. The mounting tube is slidably inserted into the positioning ring, and an anti-detachment structure is provided on the top of the positioning ring. The anti-detachment structure includes a cylindrical shell, a limiting head, and a spring. The cylindrical shell is fixedly inserted into the side wall of the mounting tube. The limiting head is slidably inserted into the cylindrical shell and has a hemispherical head extending out of the cylindrical shell. The spring is disposed inside the cylindrical shell and presses against the limiting head.

6. The vacuum drying system with airflow heating according to claim 4, characterized in that, The inner wall of the positioning ring has internal threads to allow the mounting pipe to be threaded and inserted into the positioning ring.

7. The vacuum drying system with airflow heating according to claim 1, characterized in that, Both the feed cover and the discharge cover are detachably connected to the tank body via flange structures.

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