An addition mechanism for a dimethyl adipic acid esterification catalyst
Patent Information
- Application Number
- CN202521389446.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-07-03
AI Technical Summary
[0005]本实用新型的目的是为了解决现有技术中颗粒状催化剂易在料斗内形成桥架堵塞，从而导致螺旋给料装置难以稳定的向酯化釜内输送催化剂的问题，而提出的一种己二酸二甲酯酯化催化剂的添加机构
1、该己二酸二甲酯酯化催化剂的添加机构，通过连接筒、弹簧、安装杆和刮板的配合使用，使得刮板旋转并与顶块接触后，刮板向内收缩，再次与料斗内壁接触，一方面刮除料斗内壁粘黏的催化剂，另一方面使刮板与料斗接触并撞击时产生振动，进而降低催化剂之间相互嵌合堆积，导致出现桥架堵塞的问题，有效提升绞龙叶片工作时对酯化釜内供料的稳定性。
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Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of catalyst addition mechanisms, and in particular to an addition mechanism for a dimethyl adipic acid esterification catalyst. Background Technology
[0002] Dimethyl adipic acid is a colorless and transparent liquid that is insoluble in water but soluble in alcohols and ethers. It is classified as a low-toxicity substance and is mainly used industrially as a raw material for synthesizing intermediates, pharmaceuticals, and fragrances. It is also used as a plasticizer and a high-boiling-point solvent. During its esterification process, a catalyst addition device is required to add a catalyst to accelerate the esterification reaction.
[0003] The design of the catalyst addition mechanism needs to be adapted to the catalyst type, reaction scale and degree of automation. It mainly consists of a storage unit, a metering and conveying system, a mixing and dispersing device and a safety control unit. Solid catalysts are fed by a moisture-proof hopper with a screw feeder or a vibrating conveyor. In industry, static mixers are used for premixing or mechanical stirring in the reactor to ensure uniform dispersion. Continuous processes should preferably use a closed design.
[0004] During the operation of existing catalyst addition mechanisms, due to the inherent characteristic of uneven particle size distribution of the granular catalysts being processed, catalyst particles of different sizes tend to interlock and accumulate within the mechanism, forming a stable "bridge" structure, which in turn leads to severe blockage. This bridge blockage problem directly obstructs the flow of catalyst material within the addition mechanism, making it extremely difficult to continuously and stably deliver the catalyst into the esterification reactor via the screw feeder, severely restricting the smoothness and efficiency of the production process. Utility Model Content
[0005] The purpose of this invention is to solve the problem in the prior art that granular catalysts are prone to forming bridges and clogging in the hopper, which makes it difficult for the screw feeder to stably deliver the catalyst into the esterification reactor. Therefore, this invention proposes an addition mechanism for dimethyl adipic acid esterification catalyst.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: An additive mechanism for dimethyl adipic acid esterification catalyst includes a hopper fixedly installed on an esterification reactor. The hopper has an inlet pipe and an outlet pipe. An auger blade is rotatably installed inside the outlet pipe, and the outlet pipe is connected to the inlet pipe of the esterification reactor. The mechanism also includes a connecting cylinder rotatably installed inside the hopper. An mounting rod is slidably installed on the connecting cylinder. A spring is installed inside the connecting cylinder, with both ends of the spring abutting against the connecting cylinder and the mounting rod, respectively. A scraper is fixedly installed at the end of the mounting rod, contacting the hopper. Top blocks are arranged annularly on the inner wall of the hopper. When the scraper contacts the top blocks, the scraper moves towards the mounting cylinder and compresses the spring. An anti-blocking component is rotatably installed inside the hopper, and is installed on the outside of the auger blade.
[0007] To prevent catalyst bridging, preferably, the anti-clogging component includes an "L"-shaped connecting rod rotatably installed inside the hopper, with a stirring block fixedly installed at the bottom end of the connecting rod, and the stirring block in contact with the inner wall of the hopper. When the connecting rod rotates, the stirring block rotates and pushes the granular catalyst.
[0008] To further enhance the shearing force of the agitator, the end face of the agitator is further configured as an inclined surface, with an inclination angle ranging from 30 to 45 degrees.
[0009] To facilitate the lifting of the scraper by the top block, preferably, the top block is set as a wedge-shaped block, and the inclination angle of the wedge-shaped top block is 15-30 degrees.
[0010] To facilitate the discharge of catalyst from the hopper, preferably, the bottom end face of the scraper and the top of the agitator block are at the same horizontal level.
[0011] To prevent the catalyst from clogging the discharge pipe, preferably, the end of the auger blade extends to the discharge port of the discharge pipe.
[0012] Compared with the prior art, the present invention provides an addition mechanism for a dimethyl adipic acid esterification catalyst, which has the following beneficial effects: 1. The addition mechanism of the dimethyl adipic acid esterification catalyst, through the coordinated use of the connecting cylinder, spring, mounting rod and scraper, causes the scraper to rotate and contact the top block, and then retract inward to contact the inner wall of the hopper again. On the one hand, it scrapes off the catalyst adhering to the inner wall of the hopper, and on the other hand, it causes vibration when the scraper contacts and impacts the hopper, thereby reducing the problem of catalyst interlocking and accumulation, which leads to bridge blockage. This effectively improves the stability of the feed to the esterification kettle when the auger blade is working.
[0013] 2. The addition mechanism of the dimethyl adipic acid esterification catalyst, through the connecting rod and stirring block set by the anti-clogging component, further agitates the catalyst near the auger blade area, thereby avoiding the formation of bridges and blockages between catalysts. At the same time, the tilt angle set by the stirring block increases the shear force on the catalyst when the stirring block rotates, thereby facilitating the dispersal of agglomerated or embedded particulate catalysts.
[0014] The parts of the device not described herein are the same as or can be implemented using existing technologies. This utility model generates vibration through the cooperation of the scraper and the hopper, thereby dispersing the catalyst and avoiding the problem of bridging and blockage caused by the interlocking of granular catalysts. This effectively improves the stability of the esterification reactor during feeding. Attached Figure Description
[0015] Figure 1This is an isometric structural diagram of the addition mechanism for a dimethyl adipic acid esterification catalyst proposed in this utility model. Figure 2 This is a partial structural schematic diagram of the addition mechanism for a dimethyl adipic acid esterification catalyst proposed in this utility model. Figure 3 This invention provides an additive mechanism for a dimethyl adipic acid esterification catalyst. Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This invention provides an additive mechanism for a dimethyl adipic acid esterification catalyst. Figure 2 Enlarged structural diagram at point B.
[0016] In the diagram: 1. Hopper; 2. Connecting rod; 3. Agitator block; 4. Connecting cylinder; 5. Mounting rod; 6. Spring; 7. Scraper; 8. Top block; 9. Screwdriver blade. Detailed Implementation
[0017] 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.
[0018] In the description of this utility model, 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 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. Example
[0019] Reference Figures 1-4An additive mechanism for dimethyl adipic acid esterification catalyst includes a hopper 1 fixedly mounted on an esterification reactor. The hopper 1 has an inlet pipe and an outlet pipe. An auger blade 9 is rotatably mounted inside the outlet pipe, with its end extending to the discharge port of the outlet pipe. The outlet pipe is connected to the inlet pipe of the esterification reactor. A drive motor is fixedly mounted on the hopper 1. In this application, the drive motor is a Hollysys SE-808X series servo motor. A rotating shaft is fixedly mounted on the output end of the drive motor via a coupling, with its end extending to the bottom of the outlet pipe. The mechanism also includes a connecting cylinder 4 rotatably mounted on the rotating shaft. An mounting rod 5 is slidably mounted on the connecting cylinder 4. A spring 6 is disposed inside the connecting cylinder 4, with both ends of the spring 6 abutting against the connecting cylinder 4 and the mounting rod 5, respectively. A scraper is fixedly mounted on the end of the mounting rod 5. 7. The scraper 7 contacts the hopper 1. The inner wall of the hopper 1 is arranged with top blocks 8 in a ring. When the scraper 7 contacts the top blocks 8, the scraper 7 moves towards the mounting cylinder and squeezes the spring 6. After the scraper 7 is squeezed by the spring 6 and contacts the hopper 1, it vibrates, thereby avoiding the problem of granular catalysts interlocking and forming bridge blockage. On the other hand, when the scraper 7 rotates, it can scrape off some of the catalyst adhering to the inner wall of the hopper 1, avoiding the catalyst from staying in the hopper 1 for a long time and affecting the subsequent catalyst addition. An anti-blocking component is rotatably installed on the shaft. The anti-blocking component is installed on the outside of the auger blade 9. The anti-blocking component disperses the granular catalyst near the auger blade 9 to avoid bridge blockage. On the other hand, it can push the catalyst into the conveying area of the auger blade 9 more quickly, improving the feeding efficiency.
[0020] Specifically, through the coordinated use of connecting cylinder 4, spring 6, mounting rod 5 and scraper 7, the scraper 7 rotates and contacts the top block 8, then retracts inward and contacts the inner wall of hopper 1 again. On the one hand, it scrapes off the catalyst adhering to the inner wall of hopper 1, and on the other hand, it causes vibration when the scraper 7 contacts and impacts hopper 1, thereby reducing the problem of catalyst interlocking and accumulation, which leads to bridge blockage. This effectively improves the stability of the feed to the esterification reactor when the auger blade 9 is working.
[0021] The anti-clogging component includes an "L"-shaped connecting rod 2 rotatably installed inside the hopper 1. A stirring block 3 is fixedly installed at the bottom end of the connecting rod 2, and the stirring block 3 is in contact with the inner wall of the hopper 1. When the connecting rod 2 rotates, the stirring block 3 rotates and pushes the granular catalyst. The end face of the stirring block 3 is set as an inclined surface, and the inclination angle of the inclined surface is in the range of 30-45 degrees. In this application, the inclination angle of the inclined surface of the stirring block 3 is 45 degrees. By setting the 45-degree inclined surface, the shearing force of the stirring block 3 is increased, thereby breaking up the granular catalyst and avoiding the problem of bridge blockage caused by the granular catalyst interlocking. At the same time, the rear end of the rotation direction of the stirring block 3 can enable the catalyst to quickly enter the conveying area of the auger blade 9, thereby improving the feeding efficiency of the catalyst.
[0022] Specifically, the connecting rod 2 and the stirring block 3, which are provided with anti-blocking components, further agitate the catalyst in the area near the auger blade 9, thereby preventing the formation of bridges and blockages between the catalysts. At the same time, the tilt angle of the stirring block 3 increases the shear force on the catalyst when the stirring block 3 rotates, thereby facilitating the dispersal of agglomerated or embedded particulate catalysts, making it easier for the auger blade 9 to transport the catalyst into the esterification reactor.
[0023] The top block 8 is set as a wedge-shaped block, and the inclination angle of the wedge-shaped top block 8 is 15-30 degrees. In this application, the inclination angle of the top block 8 is 30 degrees. One end face of the top block 8 is tangent to the inner wall of the hopper 1, so that when the scraper 7 rotates, the top block 8 can lift the scraper 7, avoiding the problem of the scraper 7 and the top block 8 getting stuck. At the same time, the 30-degree inclination of the top block 8 increases the retraction distance of the scraper 7, and thus the vibration effect generated when the scraper 7 is elastically pushed by the spring 6 and collides with the hopper 1 is better, which makes it easier to disperse the catalyst, thereby avoiding the formation of bridges and blockages between the catalysts.
[0024] The bottom end face of the scraper 7 is at the same level as the top of the agitator block 3. By utilizing the connection effect between the scraper 7 and the agitator block 3, the catalyst in the hopper 1 can be agitated, thereby avoiding the problem of bridge blockage caused by the compression and accumulation of catalysts after long-term use.
[0025] In this invention, granular catalyst is first poured into the hopper 1 through the feed pipe. Then, the drive motor is started, which drives the rotating shaft to rotate clockwise, thereby rotating the connecting rod 2 and the connecting cylinder 4. At this time, the scraper 7 rotates clockwise along with the connecting cylinder 4 and the mounting rod 5. When the scraper 7 contacts the top block 8, the top block 8 lifts the scraper 7, causing it to retract towards the rotating shaft and compress the spring 6. When the scraper 7 disengages from the top block 8, the spring 6 experiences reduced force and deformation, thus pushing the mounting rod 5 to move. The scraper 7 is then subjected to force in relation to the hopper. The spraying process generates vibration, which is transmitted to the catalyst through the hopper 1. This facilitates the dispersion of the catalyst and avoids the problem of bridging and blockage caused by the accumulation and compression of catalyst particles. At the same time, the scraper 7 can scrape off the granular catalyst adhering to the inner wall of the hopper 1. The stirring block 3 rotates and stirs the catalyst at the bottom of the hopper 1, while pushing some of the catalyst into the gap between the auger blades 9. Then, the catalyst is discharged from the hopper 1 and enters the esterification kettle by the rotation of the auger blades 9 along with the shaft, thus completing the catalyst addition process.
[0026] 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 mechanism for adding a dimethyl adipic acid esterification catalyst, comprising a hopper (1) fixedly mounted on an esterification reactor, wherein an inlet pipe and an outlet pipe are respectively provided on the hopper (1), and an auger blade (9) is rotatably installed inside the outlet pipe, and the outlet pipe is connected to the inlet pipe of the esterification reactor, characterized in that, Also includes: Rotate the connecting cylinder (4) installed inside the hopper (1). Among them, a mounting rod (5) is slidably installed on the connecting cylinder (4), and a spring (6) is provided inside the connecting cylinder (4). The two ends of the spring (6) abut against the connecting cylinder (4) and the mounting rod (5) respectively. A scraper (7) is fixedly installed at the end of the mounting rod (5). The scraper (7) is in contact with the hopper (1). A top block (8) is arranged in a ring on the inner wall of the hopper (1). When the scraper (7) contacts the top block (8), the scraper (7) moves towards the mounting cylinder and squeezes the spring (6). Rotate the anti-blocking component installed inside the hopper (1), which is installed on the outside of the auger blade (9).
2. The mechanism for adding a dimethyl adipic acid esterification catalyst according to claim 1, characterized in that, The anti-clogging component includes an "L"-shaped connecting rod (2) rotatably installed inside the hopper (1). A stirring block (3) is fixedly installed at the bottom end of the connecting rod (2), and the stirring block (3) is in contact with the inner wall of the hopper (1). When the connecting rod (2) rotates, the stirring block (3) rotates and pushes the granular catalyst.
3. The mechanism for adding a dimethyl adipic acid esterification catalyst according to claim 2, characterized in that, The end face of the stirring block (3) is set as an inclined surface, and the inclination angle of the inclined surface is in the range of 30-45 degrees.
4. The mechanism for adding a dimethyl adipic acid esterification catalyst according to claim 1, characterized in that, The top block (8) is set as a wedge-shaped block, and the tilt angle of the wedge-shaped top block (8) is 15-30 degrees.
5. The mechanism for adding a dimethyl adipic acid esterification catalyst according to claim 1, characterized in that, The bottom end face of the scraper (7) is at the same level as the top of the stirring block (3).
6. The mechanism for adding a dimethyl adipic acid esterification catalyst according to claim 1, characterized in that, The end of the auger blade (9) extends to the discharge port of the discharge pipe.