Chemical raw material drying equipment

Abstract

This utility model belongs to the technical field of drying equipment, specifically relating to a chemical raw material drying device, including a drying tank, a drying shaft rotatably disposed in the drying tank, and several stirring and heating shafts staggered on the drying shaft; air inlets and air outlets are respectively provided on the upper and lower ends of the two end faces of the drying tank, the air inlets are connected to a hot air assembly, and the air outlets are connected to a dust removal device; a set of back-blowing air inlets are provided on the top of the tank; several dispersing blades are provided along the axial direction of the drying shaft, and the dispersing blades are evenly distributed on the circumference of the drying shaft; a scraper pusher block is provided at the end of the stirring and heating shaft, the scraper pusher block is triangular with an arc surface at its top, the gap between the arc surface and the drying tank gradually decreases counterclockwise, and a scraper strip is provided on the side with the smaller gap. During the drying process, the drying shaft and stirring and heating shafts can turn the material more thoroughly, and at the same time, the convection design formed by the air inlet and air outlet efficiently carries away the moisture and equalizes the internal temperature, which helps to improve the drying efficiency and drying effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of drying equipment, and specifically relates to a chemical raw material drying equipment. Background Technology

[0002] Chemical raw material drying is a crucial step in chemical production. Its core function is to remove moisture (or other volatile solvents) from the raw materials. Its significance is multifaceted: it ensures the purity, activity, and performance stability of the raw materials by avoiding chemical reactions, impurities, and physical changes caused by moisture, thus guaranteeing that subsequent processing (such as reactions, molding, and extraction) meets process requirements, reducing equipment wear and energy waste, and maintaining production continuity. Furthermore, it inhibits microbial growth, oxidation, hydrolysis, and other deterioration processes, mitigating transportation safety risks associated with raw materials that readily react with water. Simultaneously, it reduces storage and transportation costs by decreasing the weight and volume of raw materials. Ultimately, it provides support for the entire chemical industry chain in terms of product quality, production efficiency, safety, environmental protection, and economic benefits.

[0003] In the drying of chemical raw materials, stirred drying equipment effectively solves the problems of uneven heat transfer, localized overheating, or incomplete drying caused by material accumulation in traditional drying processes by continuously agitating and mixing the raw materials through internal stirring devices (such as paddles, ribbons, and rakes). However, existing stirred drying equipment has poor stirring ability for powders, which easily leads to material agglomeration and uneven heating. At the same time, the high-temperature moisture inside is slowly discharged, resulting in large local temperature differences and poor drying effect and low drying efficiency. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a chemical raw material drying equipment with a simple structure and reasonable design, which aims to solve the above technical problems.

[0005] Technical solution: In order to achieve the above objectives, this utility model provides a chemical raw material drying equipment, including a drying tank, a drying shaft rotatably disposed in the drying tank, and a plurality of stirring and heating shafts interlaced on the drying shaft; The drying tank has an air inlet and an air outlet on its two end faces, respectively. The air inlet is connected to a hot air assembly, and the air outlet is connected to a dust removal device. A set of back-blowing air inlets is provided on the top of the tank. The drying shaft is provided with several dispersing blades along its axial direction. The dispersing blades are evenly distributed on the circumference of the drying shaft. The end of the stirring and heating shaft is provided with a scraper and pusher block. The scraper and pusher block is triangular with an arc surface at its top. The gap between the arc surface and the drying tank body gradually decreases counterclockwise. A scraper strip is provided on the side with the smaller gap.

[0006] Furthermore, both the drying shaft and the stirring heating shaft are hollow structures, and their cavities are interconnected, allowing the heating medium to flow into them. The stirring heating shaft is also equipped with a set of stirring blades. As heat source devices, the drying shaft and the stirring heating shaft achieve drying by evaporating moisture from the material through high temperature.

[0007] Furthermore, the drying shaft is rotatably mounted on the drying tank via a sealed bearing, and a transmission wheel is coaxially mounted at one end of the drying shaft, the transmission wheel being connected to the drive device.

[0008] Furthermore, the driving device includes a drive motor, a reducer connected to the drive motor, and a drive pulley at the output end of the reducer. The transmission pulley is connected to the drive pulley via a belt. The drive motor transmits torque to the drying shaft through the reducer, and the rotation of the drying shaft dries and agitates the material.

[0009] Furthermore, the hot air assembly includes a first fan and a heating box, the first fan being connected to the heating box and the heating box being connected to an air inlet; the heating box is equipped with an electric heating tube, and the first fan can blow hot air from the heating box into the drying tank.

[0010] Furthermore, the dust removal device includes a bag filter and a second fan located at the rear end of the bag filter, the bag filter being connected to the air outlet.

[0011] Furthermore, the back-blowing air outlet is connected to a positive pressure pulse device, and valves are provided at the air inlet, air outlet, and back-blowing air outlet. The air path structure inside the drying tank can be controlled by the on / off state of the valves.

[0012] Furthermore, the drying tank is also equipped with a feed inlet and a discharge outlet, and the end face of the drying tank is also equipped with an inspection door to facilitate the inspection and cleaning of the inside of the drying tank.

[0013] As can be seen from the above technical solution, this utility model has the following beneficial effects: 1. This utility model provides a chemical raw material drying equipment. A hot air assembly blows hot air into the drying tank through the lower air inlet, while one end of the dust removal device is under negative pressure. The hot air forms convection within the drying tank, carrying away moisture. Simultaneously, the airflow flows within the equipment, transferring excess heat from the heating surface to the low-temperature zone through convection heat transfer. A stirring device ensures full contact between the material and the airflow, further reducing the temperature difference between materials and resulting in more uniform drying. Furthermore, for some special materials, inert gas can be introduced into the drying tank to isolate oxygen and prevent easily oxidizable materials from deteriorating during drying. The material's own weight allows it to fall under the action of the dispersing blades, preventing it from clumping and sticking to the drying shaft. Similarly, to address the issue of material adhesion on the inner wall of the drying tank, scraper strips on the scraper pusher block can hang the material off the inner wall, while the scraper pusher block simultaneously propels the material forward.

[0014] 2. This utility model can also use a positive pressure pulse device to back-blow into the drying tank through the back-blowing air port, causing the material inside to float. At this time, the air inlet is immediately opened to introduce high-speed airflow into it. At the same time, the second fan forms a negative pressure through the air outlet to suck the residual material inside into the dust removal device, thus avoiding problems such as deterioration and pollution caused by material residue inside the drying tank. Attached Figure Description

[0015] Figure 1 This is a front view of a chemical raw material drying device according to the present invention; Figure 2 This is a side view of a chemical raw material drying device according to the present invention; Figure 3 This is an axial sectional view of the drying tank body described in this utility model; Figure 4 This is a radial sectional view of the drying tank body described in this utility model; Figure 5 This is a schematic diagram of the structure of the drying shaft and stirring heating shaft described in this utility model; Figure 6 This is a schematic diagram of the scraper and feed block described in this utility model.

[0016] In the diagram: 1-Drying tank, 11-Inlet, 12-Outlet, 13-Inspection door; 2-Drying shaft, 21-Breaking flakes, 22-Rotating wheel; 3-Stirring and heating shaft, 31-Scraper and feed block, 32-Scraper strip, 33-Stirring blade; 4-Air inlet; 5-Air outlet; 6-Hot air assembly, 61-First fan, 62-Heating box; 7-Dust removal device, 71-Bag filter, 72-Second fan; 8-Reverse air vent; 91-Drive motor, 92-Reducer. Detailed Implementation

[0017] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Example

[0018] In a preferred embodiment, such as Figure 1-6 As shown, a chemical raw material drying device includes a drying tank 1, a drying shaft 2 rotatably disposed in the drying tank 1, and a plurality of stirring and heating shafts 3 are staggered on the drying shaft 2; The drying tank 1 has an air inlet 4 and an air outlet 5 on its two end faces, respectively. The air inlet 4 is connected to a hot air assembly 6, and the air outlet 5 is connected to a dust removal device 7. A set of reverse air inlets 8 is provided on the top of the tank 1. The hot air assembly 6 blows hot air into the drying tank 1 from the lower air inlet 4, while one end of the dust removal device 7 is under negative pressure. The hot air forms convection in the drying tank 1, carrying away the moisture in the drying tank 1. At the same time, after the airflow is introduced, the airflow will flow in the equipment, transferring excess heat from the heating surface to the low-temperature area through convection heat transfer. Meanwhile, the stirring device ensures that the material and the airflow are in full contact, further reducing the temperature difference between the materials and making the drying effect more uniform. However, it is important to control the airflow of hot air to avoid excessive heat loss and increased energy consumption. In addition, for some special materials, an inert gas can be introduced into the drying tank 1 to isolate oxygen and prevent easily oxidized materials from deteriorating during the drying process.

[0019] The drying shaft 2 is provided with several dispersing blades 21 along its axial direction. The dispersing blades 21 are evenly distributed on the circumference of the drying shaft 2. The end of the stirring and heating shaft 3 is provided with a scraper and pusher block 31. The scraper and pusher block 31 is triangular with an arc surface at the top. The gap between the arc surface and the drying tank 1 gradually decreases counterclockwise. A scraper strip 32 is provided on the side with the smaller gap. When the material is first put into the drying tank 1, the humidity is high. In the initial stage of equipment operation, the material is prone to clump and stick to the central drying shaft 2. The dispersing blades 21 can prevent the material from clumping and sticking to the drying shaft 2 by the patting action of the dispersing blades 21 when it falls under its own weight. Similarly, the inner wall of the drying tank 1 faces the problem of material sticking. The scraper strip 32 provided on the scraper and pusher block 31 can hang the material off the inner wall and push the material forward.

[0020] The drying shaft 2 and the stirring and heating shaft 3 are both hollow structures, and their cavities are connected. A heating medium can be introduced into the cavity. The stirring and heating shaft 3 is also equipped with a set of stirring blades 33.

[0021] Specifically, the drying shaft 2 is rotatably mounted on the drying tank 1 via a sealed bearing. A transmission wheel 22 is coaxially mounted at one end of the drying shaft 2, and the transmission wheel 22 is connected to the drive device. The drive device includes a drive motor 91 and a reducer 92 connected to the drive motor 91. The output end of the reducer 92 is provided with a drive wheel, and the transmission wheel 22 is connected to the drive wheel via a belt.

[0022] In this embodiment, the hot air assembly 6 includes a first fan 61 and a heating box 62. The first fan 61 is connected to the heating box 62, and the heating box 62 is connected to the air inlet 4. The heating box 62 is equipped with an electric heating element, and the first fan 61 blows hot air from the heating box 62 into the drying tank 1. The first fan 61 draws in external air and blows it towards the heating box 62. The air is heated in the heating box 62 and then blown into the drying tank 1. As a further optimization, to prevent external impurities from entering the drying tank 1, a filter device can be installed on the air inlet side of the first fan 61 to remove impurities from the air.

[0023] In this embodiment, the dust removal device 7 includes a bag filter 71 and a second fan 72 located at the rear end of the bag filter 71. The bag filter 71 is connected to the air outlet 5. The bag filter 71 recovers some fine powder that escapes with the airflow, which can both ensure the production environment and efficiently recover the powder, reducing raw material loss.

[0024] In addition, the back-blowing port 8 is connected to a positive pressure pulse device, and valves are provided at the air inlet 4, air outlet 5, and back-blowing port 8. After drying, the material is discharged from the discharge port 12, but a small amount of fine powder material still remains inside the drying tank 1. At this time, the air inlet 4 can be temporarily closed, and the positive pressure pulse device blows back into the drying tank 1 through the back-blowing port 8, causing the material inside to float. At this time, the air inlet 4 is immediately opened to introduce a high-speed airflow into it, and at the same time, the second fan 72 forms a negative pressure through the air outlet 5 to suck the remaining material inside into the dust removal device 7.

[0025] Specifically, the drying tank 1 is also provided with a feed inlet 11 and a discharge outlet 12, and the end face of the drying tank 1 is also provided with an inspection door 13.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A chemical raw material drying device, characterized in that, Includes a drying tank (1), a drying shaft (2) rotatably disposed in the drying tank (1), and several stirring and heating shafts (3) are staggered on the drying shaft (2); The drying tank (1) has an air inlet (4) and an air outlet (5) on its two end faces respectively. The air inlet (4) is connected to a hot air assembly (6), and the air outlet (5) is connected to a dust removal device (7). The top of the drying tank (1) is provided with a set of back-blowing air inlets (8). The drying shaft (2) is provided with a number of dispersing plates (21) along its axial direction. The dispersing plates (21) are evenly distributed on the circumference of the drying shaft (2). The end of the stirring heating shaft (3) is provided with a scraper pusher block (31). The scraper pusher block (31) is triangular with an arc surface at its top. The gap between the arc surface and the drying tank (1) gradually decreases counterclockwise. A scraper strip (32) is provided on the side with the smaller gap.

2. The chemical raw material drying equipment according to claim 1, characterized in that, The drying shaft (2) and the stirring heating shaft (3) are both hollow structures, and their cavities are connected. A heating medium can be introduced into the cavity. The stirring heating shaft (3) is also provided with a set of stirring blades (33).

3. The chemical raw material drying equipment according to claim 1, characterized in that, The drying shaft (2) is rotatably mounted on the drying tank (1) via a sealed bearing. A transmission wheel (22) is coaxially mounted at one end of the drying shaft (2), and the transmission wheel (22) is connected to the drive device.

4. A chemical raw material drying device according to claim 3, characterized in that, The driving device includes a drive motor (91) and a reducer (92) connected to the drive motor (91). The output end of the reducer (92) is provided with a drive wheel, and the transmission wheel (22) is connected to the drive wheel via a belt.

5. A chemical raw material drying device according to claim 1, characterized in that, The hot air assembly (6) includes a first fan (61) and a heating box (62). The first fan (61) is connected to the heating box (62), and the heating box (62) is connected to the air inlet (4). The heating box (62) is equipped with an electric heating tube, and the first fan (61) can blow the hot air in the heating box (62) into the drying tank (1).

6. A chemical raw material drying device according to claim 1, characterized in that, The dust removal device (7) includes a bag filter (71) and a second fan (72) located at the rear end of the bag filter (71). The bag filter (71) is connected to the air outlet (5).

7. A chemical raw material drying device according to claim 1, characterized in that, The back-blowing air inlet (8) is connected to a positive pressure pulse device, and valves are provided at the air inlet (4), air outlet (5), and back-blowing air inlet (8).

8. A chemical raw material drying device according to claim 1, characterized in that, The drying tank (1) is also provided with a feed inlet (11) and a discharge outlet (12), and the end face of the drying tank (1) is also provided with an inspection door (13).

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