A purified terephthalic acid powder drying device

Abstract

The utility model discloses a kind of terephthalic acid powder drying devices, including supporting base, the upper end of the supporting base is fixedly installed with heat preservation shell, the front end of the heat preservation shell is fixedly installed with hot gas injection inlet, the inside of the heat preservation shell is installed with heat conduction drying shell, flow guide cavity is equipped between the heat preservation shell and heat conduction drying shell, the inside of the flow guide cavity is installed with spiral flow guide frame, the front end of the heat conduction drying shell is fixedly installed with shunt frame, the inside of the heat conduction drying shell is rotatably connected with hollow transmission shaft, multiple transmission heat conduction discs are installed between the heat conduction drying shell and hollow transmission shaft, the outside of each transmission heat conduction disc is fixedly installed with multiple stirring frames;The surface of the hollow transmission shaft is equipped with second flow guide hole and multiple first flow guide holes.The utility model carries out inside and outside synchronous heat conduction under the condition that terephthalic acid powder is kept isolated with hot gas, can effectively improve the drying rate of terephthalic acid powder.

Description

Technical Field

[0001] This utility model relates to the field of purified terephthalic acid production technology, specifically to a purified terephthalic acid powder drying device. Background Technology

[0002] Purified terephthalic acid is a white crystalline powder at room temperature, with low toxicity and high flammability. If mixed with air, it can ignite and even explode within certain limits. It is soluble in alkaline solutions, slightly soluble in hot ethanol, and insoluble in water, ether, glacial acetic acid, and chloroform. In its production, crude terephthalic acid must first be hydrogenated to remove impurities, followed by crystallization, separation, and drying to obtain the purified terephthalic acid product.

[0003] In existing processes for drying purified terephthalic acid powder, it is not convenient to conduct heat sufficiently while keeping the powder isolated from the hot air, resulting in a low drying rate. Therefore, this does not meet the current requirements. To address this, we propose a purified terephthalic acid powder drying device. Utility Model Content

[0004] The purpose of this invention is to provide a drying device for purified terephthalic acid powder, which solves the problem mentioned in the background art that the existing drying process for purified terephthalic acid powder is not conducive to sufficient heat conduction while keeping the purified terephthalic acid powder isolated from the hot air, resulting in a low drying rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a purified terephthalic acid powder drying device, comprising a support base, an insulating shell fixedly installed at the upper end of the support base, a hot gas injection port fixedly installed at the front end of the insulating shell, a heat-conducting drying shell installed on the inner side of the insulating shell, a flow guiding cavity provided between the insulating shell and the heat-conducting drying shell, a spiral flow guide frame installed on the inner side of the flow guiding cavity, a flow divider fixedly installed at the front end of the heat-conducting drying shell, a hollow drive shaft rotatably connected to the inner side of the heat-conducting drying shell, and multiple transmission heat-conducting discs installed between the heat-conducting drying shell and the hollow drive shaft, with multiple stirring racks fixedly installed on the outer side of each transmission heat-conducting disc.

[0006] Preferably, the surface of the hollow drive shaft is provided with a second guide hole and a plurality of first guide holes, and a drive motor is fixedly installed at the rear end of the heat insulation shell. The rear end of the hollow drive shaft passes through the heat-conducting drying shell and the heat insulation shell and is connected to the output end of the drive motor through a coupling.

[0007] Preferably, a gaseous material discharge pipe is fixedly installed at the upper end of the middle part of the heat-conducting drying shell, and the bottom end of the gaseous material discharge pipe penetrates through the heat-insulating shell and the flow guiding cavity and is connected to the interior of the heat-conducting drying shell.

[0008] Preferably, the plurality of the transmission heat conduction disks are fixedly connected to the hollow transmission shaft and arranged linearly along the axis of the hollow transmission shaft. The hollow transmission shaft and the inner sides of the plurality of transmission heat conduction disks are all connected through the first guide hole, and the hollow transmission shaft and the guide cavity are connected through the second guide hole.

[0009] Preferably, the heat-insulating shell and the heat-conducting drying shell are fixedly connected by a spiral guide frame. The front end of the hollow drive shaft passes through the heat-conducting drying shell and the heat-insulating shell. The front end of the hollow drive shaft is provided with a reflux hole. The rear end of the heat-conducting drying shell is fixedly provided with a feed pipe and a discharge pipe. Both the feed pipe and the discharge pipe pass through the heat-insulating shell and are connected to the inner side of the heat-conducting drying shell.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This utility model inputs hot air into the inner side of the heat-insulating shell through a hot air injection port. The hot air is evenly distributed to the outer side of the heat-conducting drying shell through a diverter. The heat-conducting drying shell conducts heat to the hot air, which heats the purified terephthalic acid powder. At the same time, the spiral guide frame keeps the hot air flowing in a spiral shape, which effectively increases the contact path between the hot air and the surface of the heat-conducting drying shell and improves the heat conduction of the heat-conducting drying shell. The drive motor drives multiple transmission heat-conducting discs to rotate synchronously through a hollow drive shaft. When the transmission heat-conducting discs drive the stirring frame to rotate, they can stir the purified terephthalic acid powder, which can effectively increase the contact area between the purified terephthalic acid powder and the inner wall of the heat-conducting drying shell and improve the drying rate of the purified terephthalic acid powder.

[0012] 2. This utility model connects the inner side of the hollow drive shaft to the flow guide cavity and multiple transmission heat conduction plates through a second flow guide hole and multiple first flow guide holes, respectively. The hollow drive shaft can change the direction of hot air flow through the second flow guide hole and multiple first flow guide holes, and simultaneously heat the inner side of the heat conduction drying shell through multiple transmission heat conduction plates, thereby achieving temperature balance between the inside and outside of the heat conduction drying shell and further improving the drying rate of purified terephthalic acid powder. The gaseous material discharge pipe can discharge gaseous impurities during the drying of purified terephthalic acid powder, and the front end of the hollow drive shaft can reflux the hot air, thus facilitating the recycling of hot air. The hollow drive shaft and the heat conduction drying shell can effectively separate the purified terephthalic acid powder from the hot air, avoiding interference from external air in the drying of purified terephthalic acid powder. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the entire utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the thermally conductive drying shell of this utility model;

[0016] Figure 4 This is a schematic diagram of the installation structure of the spiral guide frame of this utility model.

[0017] In the diagram: 1. Support base; 2. Insulated outer shell; 3. Hot air inlet; 4. Heat-conducting drying shell; 5. Hollow drive shaft; 6. Gaseous material discharge pipe; 7. Diverter; 8. Guide cavity; 9. First guide hole; 10. Second guide hole; 11. Drive heat-conducting plate; 12. Spiral guide frame; 13. Drive motor; 14. Stirring rack. Detailed Implementation

[0018] 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.

[0019] The drive motor 13 (model GV50-3.7KW-60-S) mentioned in this utility model can be obtained from the market or through private customization.

[0020] Please see Figure 1 and Figure 2 This utility model provides an embodiment of a purified terephthalic acid powder drying device, comprising a support base 1, an insulating shell 2 fixedly installed on the upper end of the support base 1, a hot air inlet 3 fixedly installed on the front end of the insulating shell 2, a heat-conducting drying shell 4 installed on the inner side of the insulating shell 2, a feed pipe and a discharge pipe fixedly provided at the rear end of the heat-conducting drying shell 4, both the feed pipe and the discharge pipe penetrating the insulating shell 2 and communicating with the inner side of the heat-conducting drying shell 4, a flow guiding cavity 8 provided between the insulating shell 2 and the heat-conducting drying shell 4, a gaseous material discharge pipe 6 fixedly installed at the upper end of the middle part of the heat-conducting drying shell 4, the bottom end of the gaseous material discharge pipe 6 penetrating the insulating shell 2 and the flow guiding cavity 8 and communicating with the interior of the heat-conducting drying shell 4, and the gaseous impurities during the drying of purified terephthalic acid powder can be discharged through the gaseous material discharge pipe 6.

[0021] Please see Figures 2 to 4A spiral guide frame 12 is installed inside the flow guide cavity 8. The heat insulation shell 2 and the heat conduction drying shell 4 are fixedly connected by the spiral guide frame 12. A flow divider 7 is fixedly installed at the front end of the heat conduction drying shell 4. A hollow drive shaft 5 is rotatably connected to the inside of the heat conduction drying shell 4. The front end of the hollow drive shaft 5 passes through the heat conduction drying shell 4 and the heat insulation shell 2. The front end of the hollow drive shaft 5 is provided with a return hole. The hot air can be returned through the front end of the hollow drive shaft 5, which facilitates the recycling of the hot air. The hollow drive shaft 5 and the heat conduction drying shell 4 can effectively separate the purified terephthalic acid powder from the hot air, avoiding interference from external air on the drying of the purified terephthalic acid powder.

[0022] Please see Figure 2 and Figure 3 The hollow drive shaft 5 has a second guide hole 10 and multiple first guide holes 9 on its surface. The hollow drive shaft 5 and the guide cavity 8 are connected through the second guide hole 10. Multiple transmission heat-conducting disks 11 are installed between the heat-conducting drying shell 4 and the hollow drive shaft 5. The multiple transmission heat-conducting disks 11 are fixedly connected to the hollow drive shaft 5 and are arranged linearly along the axis of the hollow drive shaft 5. The inner sides of the hollow drive shaft 5 and the multiple transmission heat-conducting disks 11 are all connected through the first guide holes 9. The hollow drive shaft 5 can change the direction of hot air flow through the second guide hole 10 and multiple first guide holes 9 and heat the inner side of the heat-conducting drying shell 4 simultaneously through the multiple transmission heat-conducting disks 11, thereby achieving temperature balance between the inside and outside of the heat-conducting drying shell 4 and improving the drying rate of purified terephthalic acid powder.

[0023] Multiple stirring racks 14 are fixedly installed on the outer side of each transmission heat-conducting plate 11. A transmission motor 13 is fixedly installed at the rear end of the heat-insulating shell 2. The rear end of the hollow transmission shaft 5 passes through the heat-conducting drying shell 4 and the heat-insulating shell 2 and is connected to the output end of the transmission motor 13 through a coupling. The hollow transmission shaft 5 synchronously drives the multiple transmission heat-conducting plates 11 to rotate. When the transmission heat-conducting plates 11 drive the stirring racks 14 to rotate, they can stir the purified terephthalic acid powder, effectively increasing the contact area between the purified terephthalic acid powder and the inner wall of the heat-conducting drying shell 4, and increasing the drying rate of the purified terephthalic acid powder.

[0024] In summary, a feed pipe and a discharge pipe are fixedly provided at the rear end of the heat-conducting drying shell 4. The purified terephthalic acid powder is placed into the inner side of the heat-conducting drying shell 4 through the feed pipe. When the power is turned on, hot air is input into the inner side of the heat-insulating shell 2 through the hot air injection port 3. A flow guide cavity 8 is provided between the heat-insulating shell 2 and the heat-conducting drying shell 4, so that the flow divider 7 and the spiral flow guide 12 are both installed inside the flow guide cavity 8. The flow divider 7 can evenly distribute the hot air to the outer side of the heat-conducting drying shell 4. The heat-conducting drying shell 4 conducts heat to heat the purified terephthalic acid powder. At the same time, the spiral flow guide 12 can keep the hot air flowing in a spiral, effectively increasing the contact path between the hot air and the surface of the heat-conducting drying shell 4 and improving the heat conduction of the heat-conducting drying shell 4.

[0025] The drive motor 13 is started, and under the support of the heat-insulating shell 2, the drive motor 13 drives multiple heat-conducting disks 11 to rotate synchronously through the hollow drive shaft 5. When the heat-conducting disks 11 drive the stirring rack 14 to rotate, they can stir the purified terephthalic acid powder, effectively increasing the contact area between the purified terephthalic acid powder and the inner wall of the heat-conducting drying shell 4, and increasing the drying rate of the purified terephthalic acid powder. At the same time, the inner side of the hollow drive shaft 5 is connected to the flow cavity 8 and the multiple heat-conducting disks 11 through the second flow hole 10 and the multiple first flow holes 9, respectively. Thus, the hollow drive shaft 5 can change the direction of hot air flow through the second flow hole 10 and the multiple first flow holes 9, and simultaneously heat the inner side of the heat-conducting drying shell 4 through the multiple heat-conducting disks 11, thereby achieving temperature balance between the inside and outside of the heat-conducting drying shell 4, and further improving the drying rate of the purified terephthalic acid powder.

[0026] The gaseous material discharge pipe 6 can discharge gaseous impurities during the drying of purified terephthalic acid powder. The front end of the hollow drive shaft 5 can reflux the hot air, thus facilitating the recycling of the hot air. The hollow drive shaft 5 and the heat-conducting drying shell 4 can effectively separate the purified terephthalic acid powder from the hot air, avoiding interference from external air in the drying of purified terephthalic acid powder.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for drying purified terephthalic acid powder, comprising a support base (1), characterized in that: A heat-insulating shell (2) is fixedly installed on the upper end of the support base (1). A hot air inlet (3) is fixedly installed on the front end of the heat-insulating shell (2). A heat-conducting drying shell (4) is installed on the inner side of the heat-insulating shell (2). A flow guide cavity (8) is provided between the heat-insulating shell (2) and the heat-conducting drying shell (4). A spiral flow guide frame (12) is installed on the inner side of the flow guide cavity (8). A flow divider frame (7) is fixedly installed on the front end of the heat-conducting drying shell (4). A hollow drive shaft (5) is rotatably connected to the inner side of the heat-conducting drying shell (4). Multiple transmission heat-conducting discs (11) are installed between the heat-conducting drying shell (4) and the hollow drive shaft (5). Multiple stirring racks (14) are fixedly installed on the outer side of each transmission heat-conducting disc (11).

2. The apparatus for drying purified terephthalic acid powder according to claim 1, wherein: The hollow drive shaft (5) has a second guide hole (10) and a plurality of first guide holes (9) on its surface. A drive motor (13) is fixedly installed at the rear end of the heat insulation shell (2). The rear end of the hollow drive shaft (5) passes through the heat-conducting drying shell (4) and the heat insulation shell (2) and is connected to the output end of the drive motor (13) through a coupling.

3. The apparatus according to claim 2, wherein the apparatus is characterized by: A gaseous material discharge pipe (6) is fixedly installed at the upper part of the middle of the heat-conducting drying shell (4). The bottom end of the gaseous material discharge pipe (6) penetrates the heat-insulating shell (2) and the flow guide cavity (8) and is connected to the interior of the heat-conducting drying shell (4).

4. The apparatus according to claim 3, wherein the apparatus is characterized by: Multiple transmission heat conduction disks (11) are fixedly connected to the hollow transmission shaft (5) and arranged linearly along the axis of the hollow transmission shaft (5). The hollow transmission shaft (5) and the inner sides of the multiple transmission heat conduction disks (11) are all connected through the first guide hole (9). The hollow transmission shaft (5) and the guide cavity (8) are connected through the second guide hole (10).

5. The apparatus according to claim 4, wherein: The heat-insulating shell (2) and the heat-conducting drying shell (4) are fixedly connected by a spiral guide frame (12). The front end of the hollow drive shaft (5) passes through the heat-conducting drying shell (4) and the heat-insulating shell (2). The front end of the hollow drive shaft (5) is provided with a reflux hole. The rear end of the heat-conducting drying shell (4) is fixedly provided with a feed pipe and a discharge pipe. The feed pipe and the discharge pipe both pass through the heat-insulating shell (2) and are connected to the inner side of the heat-conducting drying shell (4).

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