A flash dryer for pyridaben production

Abstract

A kind of flash dryer for pyridaben production, including main body, agitator and driver.The agitator includes rotating shaft and fixed to the rotating shaft outer periphery blade and scatter plate, the bottom surface of the base is provided with floating plate, the floating plate is equipped with riser between base, the riser is configured to adjust the spacing between the floating plate and the scatter plate.The utility model discloses by setting the floating plate of lift and the scatter plate with grinding tooth cooperation, the hard particles deposited in bottom in drying process are actively ground and broken, prevent particle accumulation and agitator blockage, guarantee the continuous stable operation of equipment, especially suitable for pyridaben and other pesticide intermediates such as easy hard particle drying treatment, while double-layer cylinder structure and lateral tooth piece design enhance the contact efficiency of hot air and material, improve drying uniformity.

Description

Technical Field

[0001] This utility model belongs to the field of pesticide production technology, specifically referring to a flash dryer for the production of pyridaben. Background Technology

[0002] Pyridaben is a broad-spectrum acaricide, primarily prepared through chemical synthesis. Its production process generally includes unit operations such as condensation, cyclization, filtration, washing, drying, and formulation processing. Among these, the flash dryer is mainly used for the efficient dehydration and drying of the wet filter cake obtained after filtration and washing. It utilizes a high-speed hot airflow to instantly disperse and evaporate moisture from the wet material, enabling continuous operation and rapid drying. This effectively removes solvents and moisture from the material, yielding a free-flowing powdered intermediate or technical grade, providing raw materials that meet specifications for subsequent pulverization, mixing, and formulation production.

[0003] The wet filter cake of pyridaben has uneven moisture content, with local dry lumps or large agglomerates. After entering the dryer, its outer layer dries and hardens rapidly to form a hard shell, while the internal moisture is difficult to evaporate, thus forming solid particles. In addition, if the precursor material contains a small amount of insoluble impurities or unreacted intermediates, they will also harden and aggregate under high drying temperature. These hard particles are dense and hard, and easily settle at the bottom of the main unit, which cannot be properly dispersed, eventually causing the rotating parts to jam. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a flash dryer for the production of pyridaben, so as to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted by this utility model is as follows: A flash dryer for the production of pyridaben is proposed, comprising: The main body includes an outer cylinder, an inner cylinder, and a base; A stirrer is located at the bottom interior of the main body. A driver is located at the bottom of the main body and is used to drive the agitator; The stirrer includes a rotating shaft and blades and a dispersing plate fixed to the outer periphery of the rotating shaft. The bottom surface of the base is provided with a floating plate, and a lifting device is provided between the floating plate and the base. The lifting device is configured to adjust the distance between the floating plate and the dispersing plate.

[0006] Furthermore, the inner cylinder is coaxially disposed inside the outer cylinder, and the bottom end of the inner cylinder is higher than the bottom end of the outer cylinder. The base is fixed to the bottom of the outer cylinder. A hot air pipe is provided on the outer wall of the outer cylinder. A hot air channel communicating with the hot air pipe is provided between the outer cylinder and the inner cylinder. A flash drying chamber communicating with the hot air channel is provided on the inner side of the inner cylinder.

[0007] Furthermore, the periphery of the dispersing plate is provided with toothed plates extending from the flash drying chamber toward the hot air channel, the dispersing plate is provided with through holes, and the side of the dispersing plate opposite to the floating plate is provided with second grinding teeth.

[0008] Furthermore, the floating plate is constructed as an annular disc, and the top surface of the floating plate is provided with a first grinding tooth that cooperates with the second grinding tooth.

[0009] Furthermore, the lifting device includes a hydraulic lifting device, which is connected to an external hydraulic drive mechanism via a connecting pipe.

[0010] Furthermore, the lifting stroke of the floating plate driven by the elevator is less than the distance between the bottom of the floating plate and the disintegrating plate.

[0011] Furthermore, the blades are provided in three sets along the axial direction, and in two sets along the circumferential direction in a centrally symmetrical manner.

[0012] Furthermore, the bottom of the main body is provided with a bracket, and the driver is mounted on the bracket. The driver includes a motor, a transmission component and a reducer. The reducer is fixedly located at the bottom center of the base, and the output shaft of the reducer is fixedly connected to the stirrer. The motor is connected to the reducer through the transmission component. Beneficial effects

[0013] This invention utilizes a liftable floating plate in conjunction with a grinding plate to actively grind and break up hard particles deposited at the bottom during the drying process. This prevents particle accumulation and agitator blockage, ensuring continuous and stable operation of the equipment. It is particularly suitable for drying pesticide intermediates such as pyridaben that are prone to producing hard particles. At the same time, the double-layer cylinder structure and side toothed plate design enhance the contact efficiency between hot air and materials, improving drying uniformity. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of a flash dryer for the production of pyridaben, as proposed in an embodiment of this utility model; Figure 2 This is a schematic diagram of the internal structure of a flash dryer for the production of pyridaben, as proposed in an embodiment of this utility model. Figure 3A structural schematic diagram of the floating plate and the base is provided for an embodiment of this utility model; Figure 4 A schematic diagram of the structure of the dispersant is provided for an embodiment of this utility model.

[0015] Among them, 10 is the main body; 100 is the flash drying chamber; 101 is the hot air duct; 102 is the hot air passage; 11 is the outer cylinder; 12 is the inner cylinder; 13 is the base; 14 is the floating plate; 141 is the first grinding tooth; 15 is the lifting device; 16 is the connecting pipe; 20 is the agitator; 21 is the blade; 22 is the dispersing plate; 220 is the through hole; 221 is the toothed plate; 222 is the second grinding tooth; 23 is the rotating shaft; 30 is the driver; 31 is the motor; 32 is the transmission component; and 33 is the reducer.

[0016] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0018] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments 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 the embodiments.

[0019] like Figure 1 and Figure 2 As shown in the present invention, a flash dryer for the production of pyridaben is provided. During the operation of the flash dryer, the hard particles deposited at the bottom are crushed to ensure continuous operation. The flash dryer includes a main body 10, a stirrer 20 and a driver 30.

[0020] The main body 10 includes an outer cylinder 11, an inner cylinder 12 and a base 13. The stirrer 20 is located at the bottom of the main body 10. The driver 30 is located at the bottom of the main body 10 and is used to drive the stirrer 20.

[0021] like Figure 2As shown, the inner cylinder 12 is coaxially arranged inside the outer cylinder 11, and the bottom end of the inner cylinder 12 is higher than the bottom end of the outer cylinder 11. The base 13 is fixed to the bottom of the outer cylinder 11. A hot air pipe 101 is provided on the outer wall of the outer cylinder 11. A hot air channel 102 communicating with the hot air pipe 101 is provided between the outer cylinder 11 and the inner cylinder 12. A flash drying chamber 100 communicating with the hot air channel 102 is provided on the inner side of the inner cylinder 12.

[0022] Thus, the double-layer cylinder structure allows hot air to enter the drying chamber evenly, improving drying efficiency. At the same time, the bottom of the inner cylinder 12 is raised, which facilitates the accumulation of materials at the bottom and their processing by the agitator 20.

[0023] Furthermore, an annular hot air channel 102 is formed between the outer cylinder 11 and the inner cylinder 12. The interior of the inner cylinder 12 is a flash drying chamber 100. During operation, the wet material enters the flash drying chamber 100 from above, and the hot air enters the hot air channel 102 from the hot air pipe 101 and then enters the drying chamber evenly to achieve rapid drying.

[0024] like Figure 3 and Figure 4 As shown, the stirrer 20 includes a rotating shaft 23 and blades 21 and a dispersing plate 22 fixed to the outer periphery of the rotating shaft 23. A floating plate 14 is provided on the bottom surface of the base 13. A lifting device 15 is provided between the floating plate 14 and the base 13. The lifting device 15 is configured to adjust the distance between the floating plate 14 and the dispersing plate 22.

[0025] Furthermore, the periphery of the dispersing plate 22 is provided with toothed plates 221 extending from the flash drying chamber 100 toward the hot air channel 102, the dispersing plate 22 is provided with through holes 220, and the side surface of the dispersing plate 22 opposite to the floating plate 14 is provided with second grinding teeth 222.

[0026] Among them, the toothed blade 221 can throw the material outward, enhance the contact between the material and the hot air, the through hole 220 allows small particles and airflow to pass through, improves the drying uniformity, and the second grinding tooth 222 cooperates with the first grinding tooth 141 on the floating plate 14 to achieve mechanical grinding of the deposited hard particles.

[0027] During operation, the agitator 20 is driven to rotate by the driver 30. The blade 21 is used for initial crushing and agitation of materials, and the dispersing plate 22 is used for further crushing hard particles that may be deposited at the bottom. The floating plate 14 can be adjusted up and down so that the gap between the first grinding tooth 141 on it and the second grinding tooth 222 on the dispersing plate 22 can be adjusted to meet the grinding needs of particles of different hardness and prevent jamming.

[0028] like Figure 3 and Figure 4As shown, the floating plate 14 is constructed as an annular disc. The top surface of the floating plate 14 is provided with a first grinding tooth 141 that cooperates with the second grinding tooth 222. The first grinding tooth 141 and the second grinding tooth 222 form an adjustable gap grinding pair. When hard particles enter between them, they can be effectively crushed.

[0029] Furthermore, the lifting device 15 includes a hydraulic lifting device, which is connected to an external hydraulic drive mechanism via a connecting pipe 16. The lifting stroke of the floating plate 14 driven by the lifting device 15 is less than the distance between the bottom of the floating plate 14 and the dispersing plate 22.

[0030] Among them, the hydraulic lifter has high adjustment precision and strong load-bearing capacity, making it suitable for high-load working conditions at the bottom of the dryer. The stroke limit can prevent excessive contact of the grinding teeth, which may lead to wear or stalling, thus ensuring safe operation.

[0031] Furthermore, the blades 21 are arranged in three groups along the axial direction, and two groups of blades 21 are arranged in a centrally symmetrical manner along the circumferential direction. The above arrangement allows the stirring range of the blades 21 to cover most of the bottom area of ​​the drying chamber, avoiding stirring dead corners and ensuring that the material is fully dispersed and mixed.

[0032] Specifically, the main body 10 has a support frame at its bottom, and the driver 30 is mounted on the support frame. The driver 30 includes a motor 31, a transmission component 32, and a reducer 33. The reducer 33 is fixedly located at the bottom center of the base 13, and the output shaft of the reducer 33 is fixedly connected to the agitator 20. The motor 31 is connected to the reducer 33 via the transmission component 32. This arrangement is compact and provides stable transmission. The reducer 33 provides sufficient torque to drive the agitator 20 to work continuously in materials containing hard particles.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A flash dryer for the production of pyridaben, characterized in that, include: The main body (10) includes an outer cylinder (11), an inner cylinder (12) and a base (13). A stirrer (20) is disposed at the bottom of the interior of the main body (10); A driver (30) is located at the bottom of the main body (10) and is used to drive the stirrer (20). The stirrer (20) includes a rotating shaft (23) and blades (21) and a dispersing plate (22) fixed to the outer periphery of the rotating shaft (23). The bottom surface of the base (13) is provided with a floating plate (14). A lifter (15) is provided between the floating plate (14) and the base (13). The lifter (15) is configured to adjust the distance between the floating plate (14) and the dispersing plate (22).

2. The flash dryer for the production of pyridaben according to claim 1, characterized in that: The inner cylinder (12) is coaxially disposed inside the outer cylinder (11), and the bottom end of the inner cylinder (12) is higher than the bottom end of the outer cylinder (11). The base (13) is fixed to the bottom of the outer cylinder (11). A hot air pipe (101) is provided on the outer wall of the outer cylinder (11). A hot air channel (102) communicating with the hot air pipe (101) is provided between the outer cylinder (11) and the inner cylinder (12). A flash drying chamber (100) communicating with the hot air channel (102) is provided on the inner side of the inner cylinder (12).

3. The flash dryer for the production of pyridaben according to claim 2, characterized in that: The circumference of the dispersing plate (22) is provided with toothed plates (221) extending from the flash drying chamber (100) toward the hot air channel (102). The dispersing plate (22) is provided with through holes (220). The side of the dispersing plate (22) opposite to the floating plate (14) is provided with second grinding teeth (222).

4. The flash dryer for the production of pyridaben according to claim 3, characterized in that: The floating plate (14) is constructed as an annular disc, and the top surface of the floating plate (14) is provided with a first grinding tooth (141) that cooperates with the second grinding tooth (222).

5. The flash dryer for the production of pyridaben according to claim 1, characterized in that: The lifting device (15) includes a hydraulic lifting device, which is connected to an external hydraulic drive mechanism via a connecting pipe (16).

6. The flash dryer for the production of pyridaben according to claim 5, characterized in that: The lifting stroke of the floating plate (14) driven by the elevator (15) is less than the distance between the bottom of the floating plate (14) and the disintegrating plate (22).

7. The flash dryer for the production of pyridaben according to claim 1, characterized in that: The blade (21) is provided in three groups along the axial direction, and the blade (21) is provided in two groups in a centrally symmetrical manner along the circumferential direction.

8. The flash dryer for the production of pyridaben according to claim 1, characterized in that: The bottom of the main body (10) is provided with a bracket, and the driver (30) is mounted on the bracket. The driver (30) includes a motor (31), a transmission component (32) and a reducer (33). The reducer (33) is fixedly located at the bottom middle position of the base (13), and the output shaft of the reducer (33) is fixedly connected to the stirrer (20). The motor (31) is connected to the reducer (33) through the transmission component (32).

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