Alcohol ketone impurity removal, purification and recovery device in cyclohexanone production process

Abstract

The utility model relates to an impurity removal, purification and recovery device, belongs to the technical field of impurity removal and purification, and in particular relates to an alcohol ketone impurity removal, purification and recovery device in a cyclohexanone production process, in the alcohol ketone impurity removal, purification and recovery device, a control assembly is matched with a controller through a floating plate I, a contact plate, a support block, a receiving plate and a heater; a first floating plate moves downwards along with reduction of materials, so that a contact plate meets a receiving plate and sends an electric signal, a controller controls a heater to be turned off and stop heating after receiving the electric signal, and a certain protection effect is achieved on the heater. The auxiliary assembly is matched with a second floating plate through an observation window, scale marks, a through hole, a liquid inlet hole, a limiting block and a second floating plate; when materials enter the distillation tower, the materials can enter the groove along the liquid inlet hole, the second floating plate can move upwards along with the increase of the materials, the material capacity in the distillation tower can be clearly known through the cooperation with scale marks, the power of the heater can be conveniently adjusted, and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of purification technology, specifically to a device for purifying and recovering alcohols and ketones in the production process of cyclohexanone. Background Technology

[0002] Traditional cyclohexanone production processes mainly include phenol hydrogenation, benzene hydroxide oxidation, and cyclohexane liquid-phase oxidation. The raw materials for producing cyclohexanone are benzene and hydrogen.

[0003] Chinese patent CN216909215U discloses a cyclohexanone alcohol ketone purification system for recovering alcohol and ketone solvents. The system includes a distillation column with several legs at its lower end and an insulation layer on its outer side. A heater for heating the material is located at the bottom of the column, electrically connected to a control panel on the surface of the column. The control panel also has an input terminal with a thermometer located inside the column for detecting the heating temperature, allowing for precise control of the distillation product by controlling the processing temperature as needed. The column also includes a flow guide for guiding the airflow. This patent addresses the shortcomings of existing devices by recovering the solvent and utilizing the residual heat from the steam to preheat the feed. During preheating, the flow guide provides a larger heat exchange surface for the feed, effectively improving heat exchange efficiency and demonstrating strong practicality.

[0004] In the above technical solution, the internal condition of the distillation column cannot be observed during the distillation process. When the material in the distillation column is low, the heater still maintains high power heating, which can easily lead to damage to the heater, thereby affecting the service life of the device. At the same time, it is not conducive to energy conservation and emission reduction.

[0005] Based on this, this application proposes a device for the purification and recovery of alcohols and ketones in the cyclohexanone production process. Utility Model Content

[0006] To address the aforementioned technical problems, this invention proposes an alcohol-ketone purification and recovery device for the production process of cyclohexanone. This device allows for the observation of the remaining material volume inside the distillation column via auxiliary components, facilitating timely material addition or heater power adjustment. The heater is controlled by a control component; when the material level in the distillation column is too low, the contact plate meets the receiving plate, generating an electrical signal. Upon receiving this signal, the controller shuts off the heater, providing a degree of protection and improving the device's practicality.

[0007] The technical solution to achieve the purpose of this utility model is as follows: a device for purifying and recovering alcohols and ketones in the production process of cyclohexanone, comprising a distillation column, a preheating box fixedly connected to the distillation column, an inlet box fixedly connected to the preheating box, a collection box provided on the preheating box, a distillation element provided inside the distillation column, and an auxiliary component provided inside the distillation column. The auxiliary component includes a groove, an observation window, a through hole, an inlet hole, and a second float plate. The groove is formed on the distillation column, the observation window is fixedly connected to the groove, the through hole is formed inside the distillation column, the inlet hole is formed inside the distillation column, the second float plate is slidably connected to the groove, and a control component is provided inside the distillation column.

[0008] Preferably, the auxiliary component further includes a scale line and a limiting block, the scale line being disposed on the observation window, and the two limiting blocks being fixedly connected in the groove.

[0009] Preferably, the control component includes a chute and a float plate, the chute being formed inside the distillation column and the float plate being slidably connected to the chute.

[0010] Preferably, the control component further includes a contact plate and a support block, the contact plate being fixedly connected to a float plate and the support block being fixedly connected inside the distillation column.

[0011] Preferably, the control assembly further includes a receiving plate and a heater, the receiving plate being fixedly connected to the support block, and the heater being disposed inside the distillation column.

[0012] Preferably, the control assembly further includes a thermometer and a controller, the thermometer being fixedly connected inside the distillation column, the controller being fixedly connected to the distillation column, the receiving plate being electrically connected to the controller, and the heater being electrically connected to the controller.

[0013] Compared with existing technologies, the significant advantages of this invention are:

[0014] Firstly, in this utility model, the control component works in conjunction with a chute, a float plate, a contact plate, a support block, a receiving plate, a heater, a thermometer, and a controller. When the material in the distillation column is too low, the float plate moves down as the material decreases, causing the contact plate to meet the receiving plate and send an electrical signal. After receiving the electrical signal, the controller will control the heater to shut down and stop heating, thus providing a certain degree of protection for the heater.

[0015] Secondly, in this utility model, the auxiliary components work together through the groove, observation window, scale line, through hole, liquid inlet hole, limiting block and float plate 2. When the material enters the distillation column, it will enter the groove through the liquid inlet hole. The float plate 2 will move upward as the material increases. With the scale line, the material volume in the distillation column can be clearly understood, which facilitates the adjustment of the heater power and improves the practicality of the device. Attached Figure Description

[0016] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the distillation column in this utility model;

[0020] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the auxiliary component in this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Distillation column; 2. Preheating box; 3. Liquid inlet box; 4. Collection box; 5. Control components; 51. Slide chute; 52. Float 1; 53. Contact plate; 54. Support block; 55. Receiving plate; 56. Heater; 57. Thermometer; 58. Controller; 6. Auxiliary components; 61. Groove; 62. Observation window; 63. Scale line; 64. Through hole; 65. Liquid inlet hole; 66. Limiting block; 67. Float 2; 7. Distillation components. Detailed Implementation

[0023] 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.

[0024] This utility model provides an improved device for the purification and recovery of alcohols and ketones in the cyclohexanone production process. The technical solution of this utility model is as follows:

[0025] like Figures 1-4As shown, a purification and recovery device for alcohols and ketones in a cyclohexanone production process includes a distillation column 1, a preheating box 2 fixedly connected to the distillation column 1, and a connection hole between the distillation column 1 and the preheating box 2. The connection hole is arranged in a circular array with the center of the distillation column 1 as the center, facilitating the entry of material from the preheating box 2 into the distillation column 1. A liquid inlet box 3 is fixedly connected to the preheating box 2, and a connecting pipe is provided on the liquid inlet box 3, communicating with the preheating box 2 through the connecting pipe. A collection box 4 is provided on the preheating box 2, and a connecting pipe is provided between the preheating box 2 and the collection box 4. A distillation element 7 is provided inside the distillation column 1, and an auxiliary component 6 is provided inside the distillation column 1. Component 6 includes a groove 61, an observation window 62, a through hole 64, a liquid inlet 65, and a float plate 67. The groove 61 is formed on the distillation column 1. The observation window 62 is fixedly connected to the groove 61. The observation window 62 is made of glass and can better observe the position of the float plate 67. The through hole 64 is formed inside the distillation column 1. The liquid inlet 65 is formed at the bottom of the distillation column 1. The float plate 67 is slidably connected to the groove 61. The through hole 64 is located directly above the float plate 67. When the float plate 67 moves upward as the material increases, the through hole 64 is used to balance the air pressure between the groove 61 and the outside. The distillation column 1 is equipped with a control component 5.

[0026] Furthermore, such as Figure 3 and Figure 4 As shown, the auxiliary component 6 also includes a scale line 63 and a limiting block 66. The scale line 63 is located on the observation window 62. The float 67, in conjunction with the scale line 63, can clearly show the material capacity in the distillation column 1, which facilitates the adjustment of the power of the heater 56 and improves the practicality of the device. The two limiting blocks 66 are fixedly connected in the groove 61. The limiting blocks 66 are used to prevent the float 67 from sticking to the bottom of the groove 61 and blocking the liquid inlet hole 65.

[0027] Furthermore, such as Figure 2 and Figure 3 As shown, the control component 5 includes a chute 51 and a float plate 52. The chute 51 is opened inside the distillation column 1, and the float plate 52 is slidably connected inside the chute 51. The float plate 52 and the float plate 67 are always flush.

[0028] Furthermore, such as Figure 2 and Figure 3 As shown, the control component 5 also includes a contact plate 53 and a support block 54. The contact plate 53 is fixedly connected to the float plate 52 and is located at the bottom of the float plate 52. It moves with the float plate 52. The support block 54 is fixedly connected inside the distillation column 1.

[0029] Furthermore, such as Figure 2 and Figure 3As shown, the control component 5 also includes a receiving plate 55 and a heater 56. The receiving plate 55 is fixedly connected to the support block 54. When the contact plate 53 meets the receiving plate 55, the receiving plate 55 will send an electrical signal. The heater 56 is located inside the distillation column 1.

[0030] Furthermore, such as Figures 1-3 As shown, the control component 5 also includes a thermometer 57 and a controller 58. The thermometer 57 is fixedly connected inside the distillation column 1, and the controller 58 is fixedly connected to the distillation column 1. The receiving plate 55 is electrically connected to the controller 58. When the receiving plate 55 sends an electrical signal, the controller 58 receives the electrical signal and controls the heater 56 to turn off and stop heating, which provides a certain protection for the heater 56. The heater 56 is electrically connected to the controller 58.

[0031] The specific working method is as follows: The material enters the preheating box 2 through the liquid inlet 3, and then flows into the distillation column 1 from the preheating box 2. After entering the distillation column 1, the material will enter the groove 61 through the liquid inlet 65. The float plate 67 will rise as the material increases. The volume of material in the distillation column 1 can be observed with the scale line 63. At the same time, the float plate 52 also rises as the material increases, driving the contact plate 53 to rise, so that the contact plate 53 separates from the receiving plate 55. At this time, the controller 58 controls the heater 56 to start and distill the material. The material in the distillation column 1 decreases as distillation occurs. The float plate 52 and the float plate 67 move down, driving the contact plate 53 down. When the contact plate 53 meets the receiving plate 55, the receiving plate 55 sends an electrical signal. After receiving the electrical signal, the controller 58 controls the heater 56 to turn off and stop heating. When new material is added, the contact plate 53 separates from the receiving plate 55, and the heater 56 can be restarted for heating.

[0032] 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 purification and recovery device for alcohol and ketone in a cyclohexanone production process, comprising a distillation column (1), a preheating box (2) fixedly connected to the distillation column (1), an inlet box (3) fixedly connected to the preheating box (2), a collection box (4) provided on the preheating box (2), and a distillation unit (7) provided inside the distillation column (1), characterized in that: An auxiliary component (6) is provided inside the distillation column (1). The auxiliary component (6) includes a groove (61), an observation window (62), a through hole (64), a liquid inlet (65), and a second float plate (67). The groove (61) is opened on the distillation column (1). The observation window (62) is fixedly connected to the groove (61). The through hole (64) is opened inside the distillation column (1). The liquid inlet (65) is opened inside the distillation column (1). The second float plate (67) is slidably connected to the groove (61). A control component (5) is provided inside the distillation column (1).

2. The alcohol-ketone purification and recovery device in the cyclohexanone production process according to claim 1, characterized in that: The auxiliary component (6) also includes a scale line (63) and a limiting block (66). The scale line (63) is located on the observation window (62), and the two limiting blocks (66) are fixedly connected in the groove (61).

3. The alcohol-ketone purification and recovery device in the cyclohexanone production process according to claim 1, characterized in that: The control component (5) includes a chute (51) and a float (52). The chute (51) is located inside the distillation column (1), and the float (52) is slidably connected to the chute (51).

4. The alcohol-ketone purification and recovery device in the cyclohexanone production process according to claim 3, characterized in that: The control component (5) also includes a contact plate (53) and a support block (54). The contact plate (53) is fixedly connected to the float plate (52), and the support block (54) is fixedly connected to the distillation column (1).

5. The alcohol-ketone purification and recovery device in the cyclohexanone production process according to claim 4, characterized in that: The control component (5) also includes a receiving plate (55) and a heater (56). The receiving plate (55) is fixedly connected to the support block (54), and the heater (56) is located inside the distillation column (1).

6. The alcohol-ketone purification and recovery device in the cyclohexanone production process according to claim 5, characterized in that: The control component (5) also includes a thermometer (57) and a controller (58). The thermometer (57) is fixedly connected inside the distillation column (1), and the controller (58) is fixedly connected to the distillation column (1). The receiving plate (55) is electrically connected to the controller (58), and the heater (56) is electrically connected to the controller (58).

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