A polysulfone material spray drying device with hot air premixing function

Abstract

The utility model relates to a kind of polysulfone material spray drying device with hot air premix function, belong to spray drying technical field, the device solves the problem that raw material is not sufficient with hot air contact when drying polysulfone material, raw material is easily adsorbed inner wall or agglomerate, outer cylinder and inner cylinder are equipped in its rack, inner cylinder has discharge pipe, centrifugal atomizer between outer and inner cylinder, top end is equipped with material box and centrifugal pump, heating part generates hot air through venturi tube, negative pressure is generated in contraction section, raw material is mixed and atomized in advance by suction pipe, after preliminary drying, enter connecting ring, first and second exhaust port in connecting ring are in eight character shape and spray hot air, and raw material is contacted in all directions by centrifugal atomizer, air oscillator is equipped in the two side walls of inner cylinder, to prevent raw material from being adsorbed inner wall or agglomerate, after drying, polysulfone material powder is discharged and collected by discharge pipe.

Description

Technical Field

[0001] This utility model relates to the field of spray drying technology, and in particular to a spray drying device for polysulfone materials with hot air premixing function. Background Technology

[0002] Polysulfone is a high-performance engineering plastic with excellent heat resistance, mechanical strength and chemical stability. It is widely used in electronics, medical, aerospace and other fields. In the production and processing of polysulfone, spray drying is one of the key processes. Its purpose is to convert the slurry or solution of polysulfone into a dry powder for subsequent molding and processing.

[0003] Existing spray drying equipment for polysulfone materials typically uses a centrifugal atomizer to atomize the raw material, which then comes into contact with hot air inside the drying cylinder to achieve drying. All materials are dried by atomization through the centrifugal atomizer, resulting in low efficiency. In traditional equipment, hot air enters the drying cylinder directly, and the airflow distribution when in contact with the raw material is uneven. Some areas have excessively concentrated hot air while others lack hot air, resulting in inconsistent moisture content of the dried material, which is difficult to meet the requirements of high-precision production. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies where all materials are atomized and dried using centrifugal atomizers, resulting in low efficiency. Therefore, this invention proposes a spray drying device for polysulfone materials with a hot air premixing function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A spray drying device for polysulfone materials with hot air premixing function includes a frame, an outer cylinder fixed inside the frame, an inner cylinder welded and fixed inside the outer cylinder, a discharge pipe fixed inside the inner cylinder, the discharge pipe being fixedly connected to a container for holding the dried material, and a centrifugal atomizer for atomizing and spraying polysulfone material being fixed inside the outer cylinder and the inner cylinder. The top of the outer cylinder is fixed with a material box for storing raw materials to be dried. The inner cylinder is fixed with a connecting ring, which is sleeved on the surface of the centrifugal atomizer. A connecting groove is opened in the connecting ring. A connecting pipe connected to the connecting groove is fixed on the surface of the connecting ring. The connecting pipe passes through and is fixed in the outer cylinder and the inner cylinder. A mounting plate is fixed on the side of the frame. A heating part for generating hot air is fixed on the top of the mounting plate. The heating part is used to deliver hot air into the connecting pipe. A premixing part is provided between the heating part and the connecting pipe. The premixing part is used to mix the raw materials in the material box with the hot air in advance. The connecting ring is equipped with a set of exhaust sections, which are used to evenly contact the hot air with the raw materials atomized and sprayed by the centrifugal atomizer.

[0006] In one possible design, the heating element includes a housing, within which a fan and a resistance heating wire are fixed. The fan is used to draw outside air into the housing, and the resistance heating wire is used to heat the air. An air inlet pipe is fixed to the exhaust port of the heating element.

[0007] In one possible design, the premixing unit includes a venturi tube, which is fixed between the air inlet pipe and the connecting pipe by a flange. The venturi tube is connected to the air inlet pipe and the connecting pipe respectively. A suction pipe is fixed to the constricted section on the surface of the venturi tube, and the suction pipe is fixedly connected to the material box. In this process, hot air enters the Venturi tube through the air inlet pipe. When it passes through the contraction section of the Venturi tube, the pressure decreases, creating a negative pressure. The suction pipe uses this negative pressure to draw the raw material to be dried from the material box into the Venturi tube in advance. Furthermore, because the flow rate of the hot air increases in the contraction section, the hot air quickly disperses the sucked-in raw material, forming an atomization. The atomized material then comes into full contact with the hot air for drying.

[0008] In one possible design, the connecting ring is provided with a plurality of first exhaust ports and a plurality of second exhaust ports, which are used to extend and spray hot air outward in a figure-eight shape.

[0009] In one possible design, two air oscillators are fixed inside the inner cylinder.

[0010] In one possible design, a centrifugal pump is fixed to the top of the hopper, the inlet pipe of the centrifugal pump is fixedly connected to the hopper, and the drain pipe of the centrifugal pump is fixedly connected to the centrifugal atomizer.

[0011] In this application, hot air enters the Venturi tube through the air inlet pipe. When it passes through the contraction section of the Venturi tube, the pressure decreases, generating a negative pressure. The suction pipe can use the generated negative pressure to draw the raw material to be dried from the material box into the Venturi tube in advance. Furthermore, due to the increased flow rate of the hot air in the contraction section, the hot air quickly disperses the sucked-in raw material, forming an atomization. The atomized material fully contacts the hot air for drying.

[0012] Beneficial effects: In this utility model, the polysulfone material spray drying device with hot air premixing function, by setting a premixing section between the heating section and the connecting pipe, utilizes the structural characteristics of the Venturi tube to generate negative pressure during the flow of hot air, thereby drawing the raw material in the material box into the Venturi tube in advance to mix with the hot air. The flow rate of the hot air is accelerated in the contraction section of the Venturi tube, which can quickly disperse the raw material to form atomization, so that the raw material and hot air complete preliminary mixing and drying before entering the drying area, prolonging the contact time between the raw material and the hot air, improving the drying efficiency. At the same time, since some raw material is extracted through the Venturi tube, the drying time required can be reduced. In this utility model, the polysulfone material spray drying device with hot air premixing function has multiple first exhaust ports and second exhaust ports in the connecting ring arranged in a figure-eight shape, so that the hot air can be sprayed evenly in different directions and form all-round contact with the raw material after atomization by the centrifugal atomizer. This avoids the problem of insufficient drying in some areas caused by uneven distribution of hot air, improves the uniformity of material drying, and ensures that the moisture content of the dried polysulfone material powder is consistent. In this invention, the air oscillator installed in the inner cylinder can effectively prevent the atomized raw materials from adsorbing onto the inner wall or agglomerating, ensuring that the raw materials fall smoothly for collection, while further improving the uniformity of the material particles, which is beneficial for subsequent processing and use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of a spray drying device for polysulfone materials with hot air premixing function proposed in this utility model; Figure 2 This is a cross-sectional schematic diagram of a spray drying device for polysulfone materials with hot air premixing function proposed in this utility model; Figure 3 This is a partial cross-sectional schematic diagram of a spray drying device for polysulfone materials with hot air premixing function proposed in this utility model.

[0014] In the diagram: 1. Frame; 2. Mounting plate; 3. Outer cylinder; 4. Centrifugal atomizer; 5. Heating unit; 6. Air inlet pipe; 7. Venturi tube; 8. Connecting pipe; 9. Material box; 10. Centrifugal pump; 11. Air oscillator; 12. Suction pipe; 13. Discharge pipe; 14. Connecting ring; 15. Connecting groove; 16. First exhaust port; 17. Second exhaust port; 18. Inner cylinder. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] In one embodiment: Refer to Figures 1-3A spray drying device for polysulfone materials with hot air premixing function is disclosed. This device, applied in the field of spray drying technology, includes a frame 1. An outer cylinder 3 is fixedly installed inside the frame 1. An inner cylinder 18 is fixed inside the outer cylinder 3 by welding. A discharge pipe 13 is fixedly installed inside the inner cylinder 18, with one end extending to the outside of the inner cylinder 18 for fixed communication with a container holding the dried material, ensuring smooth collection of the dried polysulfone material powder. A centrifugal atomizer 4 is fixedly installed inside both the outer cylinder 3 and the inner cylinder 18. The centrifugal atomizer 4 is used to atomize and spray the polysulfone material. Its installation position coincides with the central axis of the inner cylinder 18, ensuring uniform dispersion of the atomized material. A material box 9 is fixed at the top of the outer cylinder 3. The material box 9 is used to store polysulfone material raw materials to be dried. A centrifugal pump 10 is fixedly installed at the top of the material box 9. The water inlet pipe of the centrifugal pump 10 is fixedly connected to the material box 9. The drain pipe of the centrifugal pump 10 is fixedly connected to the centrifugal atomizer 4. Through the power of the centrifugal pump 10, the raw materials in the material box 9 can be stably transported to the centrifugal atomizer 4. A connecting ring 14 is fixed inside the inner cylinder 18. The connecting ring 14 is sleeved on the surface of the centrifugal atomizer 4. A connecting groove 15 is opened on the connecting ring 14. A connecting pipe 8 is fixed on the surface of the connecting ring 14. The connecting pipe 8 is connected to the connecting groove 15. The connecting pipe 8 passes through and is fixed to the side wall of the outer cylinder 3 and the inner cylinder 18 to ensure that the airflow can smoothly enter the connecting ring 14. A mounting plate 2 is fixed to the side of the frame 1, and a heating part 5 is fixed to the top of the mounting plate 2. The heating part 5 is used to generate hot air and deliver it into the connecting pipe 8. The heating part 5 includes a housing, and a fan and a resistance heating wire are fixed inside the housing. The fan is used to draw outside air into the housing, and the resistance heating wire can heat the drawn-in air after being energized. An air inlet pipe 6 is fixed to the exhaust port of the heating part 5, and the heated hot air is delivered to the outside through the air inlet pipe 6. A premixing section is provided between the heating section 5 and the connecting pipe 8. The premixing section is used to mix the raw materials in the material box 9 with the hot air in advance. The premixing section includes a venturi tube 7, which is fixed between the air inlet pipe 6 and the connecting pipe 8 by a flange. The venturi tube 7 is connected to the air inlet pipe 6 and the connecting pipe 8 respectively to ensure the airflow channel is sealed. A suction pipe 12 is fixed on the contraction section of the surface of the venturi tube 7. The end of the suction pipe 12 away from the venturi tube 7 is fixedly connected to the material box 9. When the hot air generated by the heating section 5 enters the venturi tube 7 through the air inlet pipe 6, the airflow cross section becomes smaller when it flows through the contraction section of the venturi tube 7, resulting in a decrease in pressure and a negative pressure effect. The suction pipe 12 uses this negative pressure to suck up the raw materials to be dried in the material box 9, so that the raw materials enter the venturi tube 7 in advance. At the same time, the flow rate of the hot air in the contraction section increases. The high-speed airflow can quickly disperse the sucked raw materials, so that the raw materials form an atomized state. The atomized material comes into full contact with the hot air, and the drying process is initially completed. A set of exhaust sections is provided inside the connecting ring 14. The exhaust sections are used to evenly contact the hot air with the raw material sprayed by the centrifugal atomizer 4. Multiple first exhaust ports 16 and multiple second exhaust ports 17 are evenly opened inside the connecting ring 14. The multiple first exhaust ports 16 and multiple second exhaust ports 17 are symmetrically distributed and extend outward in a figure-eight shape. This allows the hot air entering the connecting ring 14 from the connecting groove 15 to be evenly sprayed out in different directions through the first exhaust ports 16 and the second exhaust ports 17, forming all-round contact with the raw material after atomization by the centrifugal atomizer 4, further improving the drying effect.

[0017] In another embodiment: Refer to Figures 1-3 A spray drying device for polysulfone materials with hot air premixing function is disclosed. This device is applied in the field of spray drying technology. The structure of this embodiment is basically the same as that of the previous embodiment. The difference is that two air oscillators 11 are fixed inside the inner cylinder 18. The two air oscillators 11 are respectively installed on the two side walls of the inner cylinder 18 and located below the centrifugal atomizer 4. During the drying process, the air oscillators 11 work continuously. The vibration generated can prevent the atomized raw material from adsorbing on the inner wall of the inner cylinder 18, ensuring that the raw material can fall smoothly to the discharge pipe 13. At the same time, it can also avoid the agglomeration of raw materials and ensure that the dried material particles are uniform.

[0018] The working process of the device is as follows: First, the fan and resistance heating wire in the heating section 5 are started. The fan draws in outside air, which is heated by the resistance heating wire to form hot air. The hot air enters the Venturi tube 7 through the air inlet pipe 6. In the contraction section of the Venturi tube 7, the hot air generates negative pressure and draws in part of the raw material in the material box 9 through the suction pipe 12. The raw material is mixed with the high-speed hot air and atomized. After preliminary drying, it enters the connecting groove 15 of the connecting ring 14 through the connecting pipe 8, and then passes through the first exhaust port 16 and the second exhaust port 17 in an octagonal pattern. The material is sprayed out in a V-shape. At the same time, the centrifugal pump 10 and the centrifugal atomizer 4 are started. The centrifugal pump 10 transports the raw material in the material box 9 to the centrifugal atomizer 4. After being atomized by the centrifugal atomizer 4, it is sprayed downward. The sprayed atomized raw material comes into full contact with the hot air sprayed from the first exhaust port 16 and the second exhaust port 17, and is fully dried. During the drying process, the air oscillator 11 vibrates continuously to prevent the raw material from adsorbing on the inner wall of the inner cylinder 18 or agglomerating. Finally, the dried polysulfone material powder is discharged through the discharge pipe 13 and collected into the corresponding container.

[0019] However, as is well known to those skilled in the art, the working principles and wiring methods of centrifugal atomizers and air oscillators are commonplace and are considered conventional methods or common knowledge. Therefore, they will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0020] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A spray drying device for polysulfone materials with hot air premixing function, used for atomizing and drying polysulfone materials, characterized in that, include: A frame (1) is provided, an outer cylinder (3) is fixed inside the frame (1), an inner cylinder (18) is welded and fixed inside the outer cylinder (3), a discharge pipe (13) is fixed inside the inner cylinder (18), and the discharge pipe (13) is used to be fixedly connected to a container for holding dried material. The same centrifugal atomizer (4) for atomizing and spraying polysulfone material is fixed inside the outer cylinder (3) and the inner cylinder (18). The top of the outer cylinder (3) is fixed with a material box (9) for storing raw materials to be dried. The inner cylinder (18) is fixed with a connecting ring (14). The connecting ring (14) is sleeved on the surface of the centrifugal atomizer (4). A connecting groove (15) is opened in the connecting ring (14). A connecting pipe (8) connected to the connecting groove (15) is fixed on the surface of the connecting ring (14). The connecting pipe (8) passes through and is fixed in the outer cylinder (3) and the inner cylinder (18). The side end of the frame (1) is fixed with a mounting plate (2). The top of the mounting plate (2) is fixed with a heating part (5) for generating hot air. The heating part (5) is used to deliver hot air into the connecting pipe (8). A premixing part is provided between the heating part (5) and the connecting pipe (8). The premixing part is used to mix the raw materials in the material box (9) with the hot air in advance. The connecting ring (14) is provided with a set of exhaust sections, which are used to make the hot air come into contact with the raw materials atomized and sprayed by the centrifugal atomizer (4) evenly.

2. The spray drying device for polysulfone materials with hot air premixing function according to claim 1, characterized in that, The heating part (5) includes a housing, in which a fan and a resistance heating wire are fixed. The fan is used to draw outside air into the housing, and the resistance heating wire is used to heat the air. An air inlet pipe (6) is fixed to the exhaust port of the heating part (5).

3. The spray drying device for polysulfone materials with hot air premixing function according to claim 2, characterized in that, The premixing section includes a venturi tube (7), which is fixed between the air inlet pipe (6) and the connecting pipe (8) by a flange. The venturi tube (7) is connected to the air inlet pipe (6) and the connecting pipe (8) respectively. A suction pipe (12) is fixed to the constriction section on the surface of the venturi tube (7), and the suction pipe (12) is fixedly connected to the material box (9). Hot air enters the Venturi tube (7) through the air inlet pipe (6). When passing through the contraction section of the Venturi tube (7), the pressure decreases and a negative pressure is generated. The suction pipe (12) can draw the raw material to be dried in the material box (9) into the Venturi tube (7) in advance through the negative pressure generated. As the flow rate of hot air in the contraction section increases, the hot air quickly disperses the sucked raw material and forms atomization. The atomized material fully contacts the hot air for drying.

4. A spray drying device for polysulfone materials with hot air premixing function according to claim 3, characterized in that, The connecting ring (14) is evenly provided with multiple first exhaust ports (16) and multiple second exhaust ports (17), which are used to spray hot air outward in a figure-eight shape.

5. A spray drying apparatus for polysulfone materials with hot air premixing function according to claim 1, characterized in that, Two air oscillators (11) are fixed inside the inner cylinder (18).

6. A spray drying apparatus for polysulfone materials with hot air premixing function according to claim 1, characterized in that, A centrifugal pump (10) is fixed at the top of the material box (9). The water inlet pipe of the centrifugal pump (10) is fixedly connected to the material box (9), and the drain pipe of the centrifugal pump (10) is fixedly connected to the centrifugal atomizer (4).

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