A novel mixer for amination process

Abstract

The utility model relates to the technical field of chemical industry, disclose a kind of for aminization chemical technology's novel mixer, including backing plate, the backing plate top is fixedly connected with rectifying tank one, the backing plate top is fixedly connected with rectifying tank two, the backing plate top is fixedly connected with mixer, the rectifying tank one side wall is fixedly connected with input pipe, the input pipe one end is fixedly connected in the mixer inside, the mixer top is fixedly connected with output pipe, the output pipe one end is fixedly connected in the rectifying tank two inside, the input pipe outer wall is provided with regulating valve group. In the utility model, transmission shaft is rotated by motor output end, shear hole of rectangular array opened in its inside is sheared to the material and lye in mixer when fan blade rotates, to reach the effect of improving neutralization efficiency, solve the problem that local pH fluctuation is remarkable, neutralization is not thorough and alkali excess waste caused by laminar mixing in traditional process.

Description

Technical Field

[0001] This utility model relates to the field of chemical process technology, and in particular to a novel mixer for amination processes. Background Technology

[0002] This novel mixer for the amination process belongs to the field of chemical process technology and is mainly used in the neutralization process of acidic byproducts in amination production. During the amination synthesis stage, materials may generate carbonate-based acidic byproducts due to side reactions. If these byproducts are not effectively neutralized, they will directly affect the quality of the final product and also adversely affect subsequent production equipment. Therefore, the industry commonly uses the method of injecting alkali solution into the materials to neutralize acidic byproducts. However, traditional mixing methods cannot achieve efficient and uniform mixing of materials and alkali solution, resulting in neutralization effects that fail to meet process requirements. To address this pain point, developing a novel mixer that can improve mixing efficiency and ensure neutralization quality has become a key requirement for optimizing the amination process and improving production efficiency.

[0003] In the neutralization of acidic byproducts in the amination process, existing technologies utilize mechanical structures consisting only of a distillation column feed line, an alkali delivery line, and a single control valve, without a dedicated mixing device. The technical principle involves directly connecting the alkali line to the distillation column feed line, regulating the alkali injection rate via a single control valve, and relying on the natural flow of the material within the feed line to cause the alkali to flow along with the material, creating laminar flow contact and achieving initial mixing and neutralization. The entire process lacks any structures to enhance mixing, relying entirely on the material's own flow for mixing, and is not specifically designed for mixing efficiency and uniformity.

[0004] Existing technologies suffer from incomplete neutralization. Because current technologies rely solely on the natural flow of material and alkali solution within the pipeline for mixing, sufficient convection or shearing action cannot be achieved. Furthermore, the significant difference in diameter between the alkali solution pipe and the material pipe easily leads to laminar mixing, resulting in limited and uneven contact area. This makes it difficult for some acidic byproducts to come into contact with the alkali solution and react, thus causing incomplete neutralization. To minimize the presence of acidic byproducts, companies often have to inject excessive amounts of alkali solution. This not only wastes the alkali solution but also causes significant local pH fluctuations due to excessively high local alkali concentrations, severely impacting the product quality stability of the amination process. Therefore, a novel mixer for the amination process is proposed to address these problems. Utility Model Content

[0005] To overcome the above shortcomings, this invention provides a novel mixer for amination processes, aiming to improve the problems of significant local pH fluctuations, incomplete neutralization, and excessive waste of alkali solution caused by laminar flow mixing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A novel mixer for an amination process includes a base plate, a first distillation tank fixedly connected to the top of the base plate, a second distillation tank fixedly connected to the top of the base plate, a mixer fixedly connected to the top of the base plate, an input pipe fixedly connected to one side wall of the second distillation tank, one end of the input pipe fixedly connected to the inside of the mixer, an output pipe fixedly connected to the top of the mixer, one end of the output pipe fixedly connected to the inside of the second distillation tank, a regulating valve assembly provided on the outer wall of the input pipe, a motor fixedly connected to the outer wall of the mixer, a drive shaft fixedly connected to the output end of the motor, and a mixing assembly provided inside the drive shaft. The mixing assembly includes fan blades, the outer wall of which is fixedly connected to the inside of the drive shaft. The fan blades have shearing holes arranged in a rectangular array inside. An alkali pump is fixedly connected to the top of the mixer. A two-stage valve is provided on the outer wall of the alkali pump. A scraping assembly is provided on the inner wall of the mixer.

[0007] As a further description of the above technical solution: The scraping assembly includes multiple scrapers, the outer walls of which are slidably connected to the inner wall of the mixer, and the edges of the scrapers are chamfered for scraping the inner wall.

[0008] As a further description of the above technical solution: The scrapers are arranged in a circumferential array on the inner wall of the mixer, and all scrapers are rotatably connected inside the mixer.

[0009] As a further description of the above technical solution: Each scraper has a connecting disc fixedly connected to its inner wall, and the connecting discs are arranged in a circumferential array inside the mixer.

[0010] As a further description of the above technical solution: Each of the connecting plates is fixedly connected to a telescopic rod at its bottom, and the telescopic rods are arranged in a circular array inside the mixer.

[0011] As a further description of the above technical solution: The bottom of the telescopic rod is fixedly connected to a connecting block, and the bottom of the connecting block is fixedly connected to the outer wall of the fan blade.

[0012] As a further description of the above technical solution: A spring is fitted on the outer wall of the telescopic rod. One end of the spring is fixedly connected to the bottom of the connecting plate, and the other end of the spring is fixedly connected to the top of the connecting block.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the motor output drives the transmission shaft to rotate, and then the transmission shaft drives the fan blades fixedly connected in the mixing component to rotate synchronously. When the fan blades rotate, the shearing holes opened in the rectangular array inside them generate a shearing effect on the material and alkali solution in the mixer, thereby enabling the material and alkali solution to achieve double thorough mixing of convection and shearing in the mixer, accelerating the neutralization reaction of acidic by-products and alkali solution, thereby achieving the effect of improving neutralization efficiency. This solves the problems of significant local pH fluctuations, incomplete neutralization, and excessive waste of alkali solution caused by laminar flow mixing in traditional processes, and improves the product quality stability and material utilization of the amination process.

[0014] 2. In this utility model, the fan blades rotate, causing the connecting block fixed at the bottom to rotate synchronously. Subsequently, the connecting block drives the telescopic rod fixed at the top and the connecting disc at the top of the telescopic rod to rotate. The connecting disc drives the scraper slidably connected to the outer wall to adhere to the inner wall of the mixer. At the same time, the spring sleeved on the outer wall of the telescopic rod provides elastic support, allowing the scraper to adapt to the shape of the inner wall of the mixer for scraping. This enables the residual material adhering to the inner wall during the mixing process to be scraped off in real time and returned to the inside of the mixer, thereby reducing material waste. This solves the waste and subsequent cleaning problems caused by material adhering to the inner wall, while reducing the risk of corrosion of the equipment by residual material and improving the continuity of equipment operation and material utilization. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a novel mixer for an amination process proposed in this utility model; Figure 2 This is a schematic diagram of the mixer structure of a novel mixer for an amination process proposed in this utility model; Figure 3 This is a schematic diagram of the fan blade structure of a novel mixer for an amination process proposed in this utility model. Figure 4 This is a schematic diagram of the scraper structure of a novel mixer for an amination process proposed in this utility model; Figure 5 This is a schematic diagram of the connecting disc structure of a novel mixer for an amination process proposed in this utility model.

[0016] Legend: 1. Pad; 2. Distillation Tank 1; 3. Distillation Tank 2; 4. Mixer; 5. Inlet Pipe; 6. Outlet Pipe; 7. Control Valve Assembly; 8. Alkali Pump; 9. Two-Stage Valve; 10. Motor; 11. Drive Shaft; 12. Fan Blade; 13. Shear Hole; 14. Connecting Block; 15. Connecting Disc; 16. Scraper; 17. Telescopic Rod; 18. Spring. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1 - Figure 5 This utility model provides an embodiment of a novel mixer for an amination process, comprising a base plate 1. The base plate 1 provides stable support and installation reference for the components connected at the top, ensuring the overall structure of the device is stable and not prone to displacement during operation. A distillation tank 2 is fixedly connected to the top of the base plate 1. The distillation tank 2 stores the acidic byproducts containing carbonates generated during the synthesis stage of the amination process, providing raw material reserves for subsequent mixing and neutralization processes. A second distillation tank 3 is fixedly connected to the top of the base plate 1. The second distillation tank 3 receives the material after it has been fully mixed and neutralized by the mixer 4, and carries out subsequent distillation purification operations to obtain qualified products. A mixer 4 is fixedly connected to the top of the base plate 1. The mixer 4 serves as the core mixing space for the material and the alkali solution, providing a closed environment for the two to fully contact and react, ensuring the neutralization effect. An input pipe 5 is fixedly connected to the side wall of the first distillation tank 2. The input pipe 5 is used to discharge the acidic byproducts in the first distillation tank 2. The material is directionally conveyed into the mixer 4 to achieve orderly material transfer. One end of the input pipe 5 is fixedly connected to the inside of the mixer 4. The top of the mixer 4 is fixedly connected to the output pipe 6. The output pipe 6 is used to convey the material that has completed the neutralization reaction in the mixer 4 to the distillation tank 2 3 to connect the preceding and following processes. One end of the output pipe 6 is fixedly connected to the inside of the distillation tank 2 3. The outer wall of the input pipe 5 is provided with a regulating valve group 7. The regulating valve group 7 is used to precisely control the conveying flow rate of the material in the input pipe 5 to adapt to the mixing requirements under different working conditions and avoid the material flow fluctuation affecting the mixing uniformity. The outer wall of the mixer 4 is fixedly connected to the motor 10. The motor 10 serves as a power source to provide continuous driving force for the rotation of the drive shaft 11, ensuring the normal operation of the mixing component. The output end of the motor 10 is fixedly connected to the drive shaft 11. The drive shaft 11 is used to transmit the power of the motor 10 to the mixing component, driving the mixing component to rotate synchronously. The mixing component is installed inside the drive shaft 11. The mixing assembly includes a fan blade 12, which rotates under the drive of the drive shaft 11 to stir the material and alkali solution inside the mixer 4, promoting initial convective mixing. The outer wall of the fan blade 12 is fixedly connected to the inside of the drive shaft 11. Shear holes 13 arranged in a rectangular array are formed inside the fan blade 12. These shear holes 13 generate shear force on the material and alkali solution when the fan blade 12 rotates, breaking the laminar mixing state and achieving sufficient contact at the microscopic level, thus increasing the neutralization reaction rate. An alkali solution pump 8 is fixedly connected to the top of the mixer 4, which pumps the alkali solution... The alkali solution is pressurized and delivered into the mixer 4 to provide a reaction medium for neutralizing acidic byproducts in the material. An alkali pump 8 is fixedly connected to the top of the mixer 4. A two-stage valve 9 is installed on the outer wall of the alkali pump 8. The two-stage valve 9 is used to control the on / off and flow of the alkali solution, preventing leakage of the alkali pipeline from the source and avoiding excessive injection of alkali solution to avoid waste. A scraping component is installed on the inner wall of the mixer 4 to remove residual material adhering to the inner wall of the mixer 4, preventing material from sticking to the wall and causing waste, while reducing the corrosion of the inner wall of the equipment by residual material and extending the service life of the mixer 4.

[0019] Reference Figure 1 - Figure 5The scraping assembly includes multiple scrapers 16, which are used to scrape off residual material adhering to the inner wall of the mixer 4, preventing material from sticking to the wall and causing waste, while also preventing long-term adhesion of residual material and corrosion of the inner wall of the mixer 4. The outer walls of the scrapers 16 are slidably connected to the inner wall of the mixer 4. The scrapers 16 are arranged in a circumferential array on the inner wall of the mixer 4, which can cover the entire inner wall of the mixer 4, ensuring no dead corners are scraped. The edges of the scrapers 16 are chamfered to scrape the inner wall of the mixer 4, improving the comprehensiveness of the inner wall cleaning. All scrapers 16 rotate. Connected inside the mixer 4, the rotational characteristics of the scraper 16 allow it to rotate around the axis of the mixer 4 under power drive, achieving dynamic and continuous scraping of the inner wall. Each scraper 16 has a fixed connecting disc 15 on its inner wall. The connecting disc 15 connects the scraper 16 to the telescopic rod 17, serving as a power transmission and structural connection, ensuring that the power of the telescopic rod 17 can be synchronously transmitted to the scraper 16. The connecting discs 15 are arranged in a circumferential array inside the mixer 4, corresponding to the circumferential array of the scraper 16, ensuring that each scraper 16 experiences balanced force and synchronized movement. Each connecting plate 15 has a telescopic rod 17 fixedly connected to its bottom. The telescopic rod 17 can be extended and retracted to adjust its length, adapting to minor morphological deviations in the inner wall of the mixer 4, ensuring that the scraper 16 always fits the inner wall. The telescopic rods 17 are arranged in a circumferential array inside the mixer 4, matching the distribution of the connecting plates 15, further ensuring the consistency of adjustment of each scraping unit. A connecting block 14 is fixedly connected to the bottom of the telescopic rod 17. The connecting block 14 is used to connect the telescopic rod 17 and the fan blade 12, transmitting the rotational power of the fan blade 12 to the telescopic rod 17, so that the scraping component can operate without an additional power source, achieving energy saving. The bottom of the connecting block 14 is fixedly connected to the outer wall of the fan blade 12. A spring 18 is sleeved on the outer wall of the telescopic rod 17. The spring 18 provides elastic support force, compensating for the extension and retraction of the telescopic rod 17, and continuously applying an upward force to the connecting plate 15, ensuring that the scraper 16 remains stably fitted to the inner wall of the mixer 4, improving the scraping effect. One end of the spring 18 is fixedly connected to the bottom of the connecting plate 15, and the other end of the spring 18 is fixedly connected to the top of the connecting block 14.

[0020] Working principle: First, the material is transported to the input pipe 5 fixed on its side wall through the distillation tank 2 fixed on the top of the pad 1. After the material flow is regulated by the regulating valve group 7 on the outer wall of the input pipe 5, the material enters the mixer 4 fixed on the top of the pad 1. At the same time, the alkali solution is transported by the alkali solution pump 8 fixed on the top of the mixer 4. After the alkali solution flow is controlled by the two-stage valve 9 on the outer wall of the alkali solution pump 8, the alkali solution also enters the mixer 4. Then, the motor 10 fixed on the outer wall of the mixer 4 is started. The output end of the motor 10 drives the fixed transmission shaft 11 to rotate. The transmission shaft 11 drives the fixed fan blades 12 inside to rotate synchronously. The fan blades 12 cut through the shearing holes 13 in the rectangular array inside to cut through the material in the mixer 4. The material and the alkali solution generate a shearing action. At the same time, the connecting block 14, which is fixed to the outer wall of the fan blade 12, rotates synchronously with the fan blade 12. The top of the connecting block 14 drives the fixed telescopic rod 17 to rotate. The top of the telescopic rod 17 drives the fixed connecting plate 15 to rotate. The connecting plate 15 drives the scraper 16, which is fixed to its outer wall, to rotate. One end of the spring 18, which is sleeved on the outer wall of the telescopic rod 17, is fixed to the bottom of the connecting plate 15, and the other end is fixed to the top of the connecting block 14. The spring 18 provides elastic support so that the outer wall of the scraper 16 always slides against the inner wall of the mixer 4. Finally, the fully mixed material is transported to the inside of the distillation tank 2 3, which is fixed to the top of the pad plate 1, through the output pipe 6 fixed to the top of the mixer 4, thus completing the mixing process.

Claims

1. A novel mixer for an amination process, comprising a pad (1), characterized in that: The top of the pad (1) is fixedly connected to a first distillation tank (2), the top of the pad (1) is fixedly connected to a second distillation tank (3), the top of the pad (1) is fixedly connected to a mixer (4), the side wall of the first distillation tank (2) is fixedly connected to an input pipe (5), one end of the input pipe (5) is fixedly connected to the inside of the mixer (4), the top of the mixer (4) is fixedly connected to an output pipe (6), one end of the output pipe (6) is fixedly connected to the inside of the second distillation tank (3), the outer wall of the input pipe (5) is provided with a regulating valve group (7), the outer wall of the mixer (4) is fixedly connected to a motor (10), the output end of the motor (10) is fixedly connected to a drive shaft (11), and the inside of the drive shaft (11) is provided with a mixing component; The mixing assembly includes a fan blade (12), the outer wall of which is fixedly connected to the inside of the drive shaft (11). The fan blade (12) has shear holes (13) arranged in a rectangular array inside. The top of the mixer (4) is fixedly connected to an alkali pump (8), the outer wall of which is provided with a two-stage valve (9), and the inner wall of the mixer (4) is provided with a scraping assembly.

2. A novel mixer for an amination process according to claim 1, characterized in that: The scraping assembly includes multiple scrapers (16), the outer walls of which are slidably connected to the inner wall of the mixer (4), and the edges of the scrapers (16) are chamfered to scrape the inner wall of the mixer (4).

3. A novel mixer for an amination process according to claim 2, characterized in that: The scrapers (16) are arranged in a circumferential array on the inner wall of the mixer (4), and all scrapers (16) are rotatably connected inside the mixer (4).

4. A novel mixer for an amination process according to claim 3, characterized in that: The inner wall of each scraper (16) is fixedly connected to a connecting disc (15), and the connecting discs (15) are arranged in a circular array inside the mixer (4).

5. A novel mixer for an amination process according to claim 4, characterized in that: Each of the connecting discs (15) is fixedly connected to a telescopic rod (17), which is arranged in a circular array inside the mixer (4).

6. A novel mixer for an amination process according to claim 5, characterized in that: The bottom of the telescopic rod (17) is fixedly connected to a connecting block (14), and the bottom of the connecting block (14) is fixedly connected to the outer wall of the fan blade (12).

7. A novel mixer for an amination process according to claim 6, characterized in that: The telescopic rod (17) is fitted with a spring (18) on its outer wall. One end of the spring (18) is fixedly connected to the bottom of the connecting plate (15), and the other end of the spring (18) is fixedly connected to the top of the connecting block (14).

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