Caprolactam distillation coupling continuous production device

Abstract

The utility model relates to a production device, belongs to the technical field of chemical production, and particularly relates to a caprolactam distillation coupling continuous production device which comprises a processing tank body, a top cover, a distillation device, a limiting pipeline, a discharge pipeline device, a solid-liquid separation tank and a driving mechanism. The solid-liquid separation tank is provided with a filtering hole and a bottom turning plate sealing assembly, and a rotary driving mechanism can drive the solid-liquid separation tank to rotate. The caprolactam solid-liquid separation device achieves the effects of efficient and automatic solid-liquid separation and smooth discharge of solid impurities, solves the problems that an existing caprolactam production device is low in solid-liquid separation efficiency, inconvenient to operate, difficult to maintain and insufficient in solution discharge, distillation continuity and device sealing performance, and powerfully improves production convenience and stability.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and in particular to a caprolactam distillation coupled continuous production device. Background Technology

[0002] In the chemical production field, especially in the industrial production of caprolactam, high efficiency, continuous operation, and equipment stability are the core challenges for improving production capacity and product quality. Current processes suffer from particularly prominent problems such as low solid-liquid separation efficiency, reliance on manual intervention for residue cleaning, and the disconnect between distillation and separation processes, severely restricting cost control and technological upgrades for large-scale production.

[0003] A search revealed that Chinese patent CN222586555U discloses a distillation-type chemical reactor, which optimizes heat transfer efficiency and inhibits scaling through a double-layered insulated shell, built-in coils, and scraping components. However, this device only focuses on heating and stirring functions and does not address the online separation and continuous slag discharge of reaction products, thus failing to meet the stringent requirements of caprolactam production for solid-liquid processing, residue diversion, and full-process sealing.

[0004] Further analysis of the current industry situation reveals the following existing technical problems with caprolactam production facilities:

[0005] Solid-liquid separation relies on external equipment: traditional processes require transferring the reaction liquid to a centrifuge or filter press for processing, which leads to process interruption, low efficiency, and residues that easily adhere to the inner wall of the equipment, requiring frequent shutdowns for cleaning.

[0006] The distillation and separation processes are separated: the liquid product after distillation needs to be manually introduced into the separation unit, which is cumbersome and prone to introducing contamination, affecting product purity (such as excessive oligomer content).

[0007] Insufficient sealing and automation: The open slag discharge design is prone to leakage of toxic gases (such as SO3), threatening operational safety; there are many manual intervention steps, making it difficult to achieve continuous production.

[0008] In summary, the goal is to develop a coupled production device that integrates efficient solid-liquid separation, continuous slag discharge, and excellent sealing performance with a high degree of automation. Utility Model Content

[0009] To address the aforementioned technical problems, this invention proposes a continuous production device for caprolactam distillation coupling. The solid-liquid separation tank is equipped with filter holes and a bottom flap sealing assembly, and a rotary drive mechanism can rotate it. This invention achieves efficient and automated solid-liquid separation and smooth discharge of solid impurities.

[0010] The technical solution to achieve the purpose of this utility model is: a continuous production device for caprolactam distillation coupling, including a processing tank and a top cover adapted to the top of the processing tank, a distillation device communicating with the inside of the processing tank is provided on the outside of the processing tank, and also includes;

[0011] The limiting pipe is provided at the bottom center of the processing tank, which connects to the outside of the processing tank.

[0012] The processing tank is provided with a drain pipe device that connects to the base platform on the outer side of the bottom.

[0013] A solid-liquid separation tank, wherein a rotatable solid-liquid separation tank is provided on the base platform, and a bottom flap sealing assembly that can be flipped up and down is provided at the bottom of the solid-liquid separation tank;

[0014] The solid-liquid separation tank includes a separation tank body and filter holes opened on the outer cylinder of the upper half of the separation tank body. The bottom flap sealing assembly includes an inner liner baffle that is movably connected to the lower half of the separation tank body. A motor is provided on the outside of the separation tank body to drive the inner liner baffle to flip up and down.

[0015] The drive mechanism includes a rotary drive mechanism extending into the interior of the processing tank and located outside the top cover. The rotary drive mechanism is detachably connected to a flange assembly located on the top of the solid-liquid separation tank.

[0016] In some embodiments, the rotary drive mechanism includes a motor mounted on the top of the top cover. The bottom output rod of the motor is connected to a flange assembly located below the top cover. The flange assembly includes a flange body corresponding to the top of the separation tank body. Multiple sets of fixing bolts are provided at the edge of the flange body. A mating hole adapted to the thread of the fixing bolt is opened at the top edge of the separation tank body.

[0017] In some embodiments, the bottom of the separation tank body is inserted into the top opening of the limiting pipe, and the second motor is located above the limiting pipe.

[0018] In some embodiments, a drain pipe is installed at the bottom edge of the processing tank, the upper opening of the drain pipe is located below the upper opening of the limiting pipe, and a valve is provided on the external pipe of the drain pipe.

[0019] In some embodiments, the distillation apparatus includes a distillation apparatus body mounted on the outside of the processing tank, and the output end of the distillation apparatus body is connected to the interior of the processing tank via a pipe.

[0020] In some embodiments, the discharge pipe device includes a guide pipe that connects to the bottom of the limiting pipe, the guide pipe being inclined downwards, and a sealing cap being threadedly connected to the opening of the guide pipe.

[0021] Compared with existing technologies, the significant advantages of this invention are:

[0022] Firstly, this invention achieves efficient and automated solid-liquid separation by detachably connecting a rotary drive mechanism (motor 1 and flange assembly) to the flange assembly at the top of the solid-liquid separation tank, and by incorporating filter holes and a bottom flap sealing assembly (motor 2 and inner tank baffle) on the solid-liquid separation tank. Motor 1 drives the solid-liquid separation tank to rotate, accelerating the separation speed and improving efficiency. The filter holes effectively filter the liquid, and the inner tank baffle, driven by motor 2, precisely controls the unloading of solids. Furthermore, the entire solid-liquid separation tank is detachable, facilitating maintenance and cleaning, and greatly enhancing the convenience and stability of production. This is the core and most practical structural design of this device.

[0023] Secondly, in this invention, the design of the limiting pipe ingeniously undertakes the crucial task of collecting and guiding the discharge of solid impurities. When the bottom flap sealing assembly (motor 2, inner tank baffle) operates, causing solid impurities inside the separator to fall downwards, the limiting pipe accurately catches these impurities. It acts as an efficient "impurity transport channel," smoothly discharging solid impurities generated from the bottom of the solid-liquid separator through the discharge pipe device. This design prevents the accumulation of solid impurities within the device, ensuring smooth production and effectively improving equipment stability and product quality.

[0024] This invention solves the problems of low solid-liquid separation efficiency, inconvenient operation, and difficult equipment maintenance in existing caprolactam production units, as well as deficiencies in solution discharge, distillation continuity, and unit sealing. Attached Figure Description

[0025] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a caprolactam distillation coupled continuous production device provided in one embodiment of the present invention;

[0027] Figure 2 This is a half-sectional schematic diagram of the internal structure of a caprolactam distillation coupled continuous production device provided in one embodiment of the present invention;

[0028] Figure 3 This is a half-sectional view of the connection between the solid-liquid separation tank and the drive mechanism provided in one embodiment of the present invention;

[0029] Figure 4 This is the internal structure of the processing tank provided in one embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Processing tank body; 101. Top cover; 102. Drain pipe; 2. Main body of distillation apparatus; 3. Separation tank body; 301. Filter hole; 302. Docking hole; 4. Motor 1; 401. Flange body; 402. Fixing bolt; 5. Guide pipe; 501. Sealing cover; 6. Motor 2; 601. Inner liner baffle; 7. Limiting pipe. Detailed Implementation

[0032] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0033] This utility model provides an improved continuous production apparatus for caprolactam distillation coupling. The technical solution of this utility model is as follows:

[0034] like Figure 1 - Figure 4 As shown, a continuous caprolactam distillation coupling production apparatus includes a processing tank 1 and a top cover 101 adapted to the top of the processing tank 1. A distillation device communicating with the interior of the processing tank 1 is provided on the outside of the processing tank 1. The apparatus also includes a limiting pipe 7, a discharge pipe device, a solid-liquid separation tank, and a drive mechanism. The limiting pipe 7 is located at the bottom center of the processing tank 1 and communicates with the outside of the processing tank 1; the discharge pipe device is located on the outside of the bottom of the processing tank 1 and communicates with a base platform; the solid-liquid separation tank is mounted on the base platform and is rotatable, with a bottom flap sealing assembly that can be flipped up and down at its bottom; the drive mechanism is located outside the top cover 101 and extends into the interior of the processing tank 1, and is detachably connected to a flange assembly located on the top of the solid-liquid separation tank. The solid-liquid separation tank includes a separation tank body 3 and filter holes 301 opened on the outer cylinder of the upper half of the separation tank body 3. The bottom flap sealing assembly includes an inner liner baffle 601 movably connected to the lower half of the separation tank body 3. A motor 6 is provided on the outside of the separation tank body 3 to drive the inner liner baffle 601 to flip up and down. Through the rotation drive of the solid-liquid separation tank and the linkage control of the flap sealing assembly, the solid-liquid separation and residue discharge can be continuously operated, reducing the downtime cleaning steps in the traditional process.

[0035] like Figure 1As shown, in one embodiment, the rotary drive mechanism includes a motor 4 mounted on the top of the top cover 101. The bottom output rod of the motor 4 is connected to a flange assembly located below the top cover 101. The flange assembly includes a flange body 401 corresponding to the top of the separation tank body 3. Multiple sets of fixing bolts 402 are provided at the edge of the flange body 401. The top edge of the separation tank body 3 has mating holes 302 adapted to the fixing bolts 402. The output rod of the motor 4 is threadedly connected to the upper end of the solid-liquid separation tank through the flange assembly. The arrangement of the motor 4 and the flange assembly realizes the rotary drive of the solid-liquid separation tank, which facilitates the solid-liquid separation operation. The detachable connection method facilitates the maintenance and replacement of the solid-liquid separation tank. The quick disassembly and assembly design of the flange assembly makes it easy to replace the separation tank body with different apertures without stopping the machine, adapting to the separation needs of various materials.

[0036] like Figure 2 - Figure 4 As shown, in one embodiment, the bottom of the separation tank body 3 is inserted into the top opening of the limiting pipe 7, and the second motor 6 is located above the limiting pipe 7. By inserting the bottom of the separation tank body 3 into the limiting pipe 7, the position of the solid-liquid separation tank is limited, making it more stable during operation. At the same time, the arrangement of the second motor 6 above the limiting pipe 7 makes reasonable use of space and facilitates the operation and maintenance of the second motor 6.

[0037] like Figure 2 As shown, in one embodiment, a drain pipe 102 is installed at the bottom edge of the processing tank 1. The upper opening of the drain pipe 102 is located below the upper opening of the limiting pipe 7, and a valve is installed on the external pipe of the drain pipe 102. By setting up the drain pipe 102, opening the valve on the outside of the drain pipe 102 can discharge the solution inside the processing tank 1 to the outside, realizing the function of conveniently and quickly discharging the solution inside the processing tank 1, which is beneficial for the handling and replacement of the solution during the production process.

[0038] like Figure 1 As shown, in one embodiment, the distillation apparatus includes a distillation apparatus body 2 installed outside the processing tank 1, and the output end of the distillation apparatus body 2 is connected to the interior of the processing tank 1 via a pipe. The distillation apparatus body 2 enables the distillation of caprolactam, and the connection to the interior of the processing tank 1 via a pipe ensures the continuity and efficiency of the distillation process, thereby improving production efficiency.

[0039] like Figure 2 - Figure 4As shown, in one embodiment, the discharge pipe device includes a guide pipe 5 connected to the bottom of the limiting pipe 7. The guide pipe 5 slopes downward, and a sealing cap 501 is threadedly connected to the opening of the guide pipe 5. The guide pipe 5 and the sealing cap 501 facilitate the smooth discharge of liquid from the limiting pipe 7. Simultaneously, the sealing cap 501 ensures a tight seal when not in use, preventing liquid leakage and the entry of impurities, thus contributing to production safety and stability.

[0040] In addition, in the above structure, the filter holes 301 opened on the outer cylinder of the upper part of the solid-liquid separation tank and the inner liner baffle 601 cooperate to achieve effective separation of solid-liquid mixture. The inner liner baffle 601 can be rotated up and down by the motor 6, which can control the process of solid-liquid separation and unloading operation, thereby improving separation efficiency and automation.

[0041] The working principle and usage process of this utility model are as follows: First, caprolactam and other raw materials are added to the processing tank 1. The main body 2 of the distillation device is started to distill the raw materials. The distilled liquid is then further processed in the processing tank 1. When solid-liquid separation is required, the solid-liquid separation tank is rotated by motor 4. Solid-liquid separation is performed using the filter holes 301 on the separation tank body 3. The solids remain in the separation tank body, while the liquid flows out through the filter holes 301. After separation, the inner baffle 601 can be flipped by motor 6 to discharge the solids. If it is necessary to discharge the solution in the processing tank 1, the valve of the drain pipe 102 can be opened for drainage. The limiting pipe 7 positions the solid-liquid separation tank, and the guide pipe 5 can drain the liquid in the limiting pipe 7. The sealing cover 501 ensures its airtightness. In this technical solution, from raw material distillation and solid-liquid separation to residue discharge, each module works together to achieve continuous production, which is suitable for large-scale caprolactam preparation scenarios.

[0042] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A continuous caprolactam distillation coupled production apparatus, comprising a processing tank (1) and a top cover (101) adapted to the top of the processing tank (1), wherein a distillation device communicating with the interior of the processing tank (1) is provided on the outside of the processing tank (1), characterized in that: Also includes; Limiting pipe (7): The bottom center of the processing tank (1) is provided with a limiting pipe (7) that connects to the outside of the processing tank (1); The processing tank (1) is provided with a drain pipe device on the outer side of its bottom, which is connected to the base platform. A solid-liquid separation tank, wherein a rotatable solid-liquid separation tank is provided on the base platform, and a bottom flap sealing assembly that can be flipped up and down is provided at the bottom of the solid-liquid separation tank; The solid-liquid separation tank includes a separation tank body (3) and a filter hole (301) opened on the outer cylinder of the upper half of the separation tank body (3). The bottom flap sealing assembly includes an inner liner baffle (601) movably connected to the lower half of the separation tank body (3). A second motor (6) for driving the inner liner baffle (601) to flip up and down is provided on the outside of the separation tank body (3). The drive mechanism is provided outside the top cover (101) and extends into the interior of the processing tank (1). The rotary drive mechanism is detachably connected to the flange assembly provided on the top of the solid-liquid separation tank.

2. The caprolactam distillation coupled continuous production apparatus according to claim 1, characterized in that: The rotary drive mechanism includes a motor (4) mounted on the top of the top cover (101). The bottom output rod of the motor (4) is connected to a flange assembly located below the top cover (101). The flange assembly includes a flange body (401) corresponding to the top of the separation tank body (3). Multiple sets of fixing bolts (402) are provided at the edge of the flange body (401). A mating hole (302) adapted to the thread of the fixing bolt (402) is opened at the top edge of the separation tank body (3).

3. The caprolactam distillation coupled continuous production apparatus according to claim 1, characterized in that: The bottom of the separation tank body (3) is inserted into the top opening of the limiting pipe (7), and the motor (6) is located above the limiting pipe (7).

4. The caprolactam distillation coupled continuous production apparatus according to claim 1, characterized in that: A drain pipe (102) is installed at the bottom edge of the processing tank (1). The upper opening of the drain pipe (102) is located below the upper opening of the limiting pipe (7). A valve is installed on the external pipe of the drain pipe (102).

5. The caprolactam distillation coupled continuous production apparatus according to claim 1, characterized in that: The distillation apparatus includes a main body (2) of the distillation apparatus installed outside the processing tank (1), and the output end of the main body (2) of the distillation apparatus is connected to the interior of the processing tank (1) through a pipe.

6. The caprolactam distillation coupled continuous production apparatus according to claim 5, characterized in that: The discharge pipe device includes a guide pipe (5) that connects to the bottom of the limiting pipe (7). The guide pipe (5) is inclined downward, and a sealing cap (501) is threadedly connected to the opening of the guide pipe (5).

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