A cyclohexanone oximation catalyst pretreatment device in a caprolactam production process

Abstract

The utility model relates to the technical field of pretreatment devices for caprolactam production, and discloses a cyclohexanone oximation catalyst pretreatment device in a caprolactam production process, comprising a shell and a catalyst chamber, wherein the shell is provided with a catalyst chamber inside, the top of the catalyst chamber passes through the top of the shell and extends upward, the left and right sides of the catalyst chamber are connected to the left and right side walls of the shell through connecting columns, the upper left end of the catalyst chamber is provided with a feed inlet, the bottom of the catalyst chamber is provided with a discharge port, the inside of the feed inlet is connected with a filter screen, a stirring motor is installed at the middle of the top of the catalyst chamber, the output shaft of the stirring motor passes through the top of the catalyst chamber and is connected to an internal coupling. The utility model provides a filter screen in the feed inlet of the catalyst chamber, so that the added liquid raw material can be filtered to remove the particulate impurities mixed therein, thereby improving the quality of caprolactam production.

Description

Technical Field

[0001] The utility model relates to the technical field of pretreatment devices for caprolactam production, in particular to a cyclohexanone oximation catalyst pretreatment device in a caprolactam production process. Background Art

[0002] Caprolactam is an organic compound with the chemical formula C6H11NO. It is widely used in gears, bearings, pipes, medical devices and electrical insulation materials. In the production process of caprolactam, a cyclohexanone oximation catalyst pretreatment device is used.

[0003] The existing cyclohexanone oximation catalyst pretreatment device in the caprolactam production process cannot filter out particulate impurities mixed in the added liquid raw material during use, resulting in low quality of the produced caprolactam and slow reaction efficiency. Therefore, a cyclohexanone oximation catalyst pretreatment device in the caprolactam production process is urgently needed to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a cyclohexanone oximation catalyst pretreatment device in a caprolactam production process, so as to solve the problem that the existing cyclohexanone oximation catalyst pretreatment device in the caprolactam production process proposed in the above background technology cannot filter out particulate impurities mixed in the added liquid raw material during use, resulting in low quality of the produced caprolactam and slow reaction efficiency.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A cyclohexanone oximation catalyst pretreatment device in a caprolactam production process comprises a shell and a catalyst chamber, wherein the shell is provided with a catalyst chamber, the top of the catalyst chamber passes through the top of the shell and extends upward, the left and right sides of the catalyst chamber are connected to the left and right side walls of the shell via connecting columns, an inlet is provided at the upper left end of the catalyst chamber, a discharge port is provided at the bottom of the catalyst chamber, a filter is connected to the inside of the inlet, a stirring motor is installed in the middle of the top of the catalyst chamber, the output shaft of the stirring motor passes through the top of the catalyst chamber and is connected to an internal coupling, the lower end of the coupling is connected to a stirring shaft, support feet are connected to both sides of the bottom of the shell, and a heater is installed on the lower right side of the inside of the catalyst chamber.

[0007] As a preferred technical solution of the present invention, the number of the connecting columns is set to four, and the four connecting columns are arranged in pairs relative to the catalytic chamber.

[0008] As a preferred technical solution of the present invention, the bottom of the discharge port passes through the bottom of the shell and extends downward, and a valve is installed on the discharge port.

[0009] As a preferred technical solution of the present invention, a limiting support is sleeved on the upper end of the stirring shaft, and both ends of the limiting support are connected to the top of the catalyst chamber.

[0010] As a preferred technical solution of the present invention, the number of the supporting legs is set to four, and the four supporting legs are arranged in pairs relative to each other with respect to the bottom of the shell.

[0011] As a preferred technical solution of the present invention, the shape of the limiting support member is a U-shaped structure.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The utility model provides a filter screen at the feed inlet of the catalyst chamber, thereby filtering out particulate impurities mixed in the added liquid raw material, thereby improving the quality of caprolactam production.

[0014] 2. The utility model provides a heater inside the catalyst chamber to heat the liquid, thereby improving the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0019] In the figure: 1. Shell; 2. Support legs; 3. Catalytic chamber; 4. Inlet; 5. Outlet; 6. Valve; 7. Stirring motor; 8. Coupling; 9. Stirring shaft; 10. Limiting support; 11. Filter; 12. Connecting column; 13. Heater. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to explain the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the utility model. The different types of cross-section lines in the accompanying drawings of the embodiments of the present utility model are not marked in accordance with national standards, nor do they impose requirements on the materials of the components. Instead, they are used to distinguish the cross-sectional views of the components in the drawings.

[0021] See also Figure 1-3 The catalytic converter 11 is connected to the bottom of the catalytic converter 11 and the bottom of the catalytic converter 11 is connected to the bottom of the catalytic converter 11.

[0022] The number of the connecting columns 12 is set to four, and the four connecting columns 12 are arranged in pairs relative to the catalyst chamber 3 .

[0023] The bottom of the discharge port 5 passes through the bottom of the shell 1 and extends downward, and a valve 6 is installed on the discharge port 5.

[0024] A limiting support 10 is sleeved on the upper end of the stirring shaft 9 , and both ends of the limiting support 10 are connected to the top of the catalyst chamber 3 .

[0025] The number of the supporting legs 2 is four, and the four supporting legs 2 are arranged in pairs relative to each other with respect to the bottom of the housing 1 .

[0026] The limiting support member 10 is in a U-shaped structure.

[0027] The working principle and usage process of the present invention are as follows: first, the liquid raw material for producing caprolactam is poured into the catalyst chamber 3 from the feed port 4. The added liquid raw material can be filtered out of particulate impurities mixed therein through the filter screen 11 in the feed port 4, thereby improving the quality of the produced caprolactam. Then, the catalyst is added to the catalyst chamber 3. At this time, the heater 13 is energized. The liquid in the catalyst chamber 3 is heated by the heater 13 to improve the reaction efficiency. At the same time, the stirring motor 7 is started to drive the stirring shaft 9 through the coupling 8 to mix and stir the heated liquid, thereby accelerating the reaction speed. The target product is finally obtained by opening the valve 6 on the discharge port 5 and being discharged from the discharge port 5. The limiting support 10 can improve the stability of the stirring shaft 9 during rotation. The content not described in detail in this description belongs to the existing technology well known to professional and technical personnel in this field.

[0028] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A cyclohexanone oximation catalyst pretreatment device in a caprolactam production process, comprising a housing (1) and a catalyst chamber (3), characterized in that: A catalyst chamber (3) is arranged inside the shell (1), the top of the catalyst chamber (3) passes through the top of the shell (1) and extends upward, the left and right sides of the catalyst chamber (3) are connected to the left and right side walls of the shell (1) through connecting columns (12), an inlet (4) is provided at the upper left end of the catalyst chamber (3), a discharge port (5) is provided at the bottom of the catalyst chamber (3), a filter screen (11) is connected inside the inlet (4), a stirring motor (7) is installed in the middle of the top of the catalyst chamber (3), the output shaft of the stirring motor (7) passes through the top of the catalyst chamber (3) and is connected to the internal coupling (8), the lower end of the coupling (8) is connected to a stirring shaft (9), support feet (2) are connected to both sides of the bottom of the shell (1), and a heater (13) is installed on the lower right side of the inside of the catalyst chamber (3).

2. The cyclohexanone oximation catalyst pretreatment device in a caprolactam production process according to claim 1, characterized in that: The number of the connecting columns (12) is set to four, and the four connecting columns (12) are arranged in pairs relative to the catalyst chamber (3).

3. The cyclohexanone oximation catalyst pretreatment device in a caprolactam production process according to claim 1, characterized in that: The bottom of the discharge port (5) passes through the bottom of the housing (1) and extends downwards, and a valve (6) is installed on the discharge port (5).

4. The cyclohexanone oximation catalyst pretreatment device in a caprolactam production process according to claim 1, characterized in that: A limiting support member (10) is sleeved on the upper end of the stirring shaft (9), and both ends of the limiting support member (10) are connected to the top of the catalyst chamber (3).

5. The cyclohexanone oximation catalyst pretreatment device in a caprolactam production process according to claim 1, characterized in that: The number of the supporting legs (2) is set to four, and the four supporting legs (2) are arranged in pairs relative to the bottom of the housing (1).

6. The cyclohexanone oximation catalyst pretreatment device in a caprolactam production process according to claim 4, characterized in that: The position-limiting support member (10) is in the shape of a U-shaped structure.

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