Separation and recovery device for waste dimethyltetrahydrofuran

Abstract

The utility model belongs to the technical field of chemical separation, and particularly relates to a separation and recovery device for waste dimethyltetrahydrofuran, which is characterized in that a gas outlet is formed in the top of a rectifying tower, a gas outlet pipe is fixedly connected to the gas outlet, a feeding pipe is fixedly connected to the side wall of the rectifying tower, and a plurality of groups of tower plate components are arranged on the inner wall of the rectifying tower; a heating plate is arranged at the bottom of the inner wall of the rectifying tower, waste liquid is heated through the heating plate, gas-liquid separation of dimethyltetrahydrofuran and impurities is achieved through a plurality of groups of tower plate assemblies, steam enters a collecting assembly through a gas outlet pipe arranged at the top of the rectifying tower to be collected, and a cooling assembly is arranged on the outer surface of the collecting assembly. And the gaseous dimethyl tetrahydrofuran solution can be condensed through the cooling assembly and finally collected, so that the separation and recovery of the waste dimethyl tetrahydrofuran are realized.

Description

Technical Field

[0001] This utility model belongs to the field of chemical separation technology, and in particular relates to a separation and recovery device for waste dimethyltetrahydrofuran. Background Technology

[0002] Dimethyltetrahydrofuran (2-MeTHF) is a high-boiling-point, low-toxicity ether solvent widely used in pharmaceutical synthesis, polymer processing, and lithium-ion battery electrolytes. However, wastewater containing 2-MeTHF generated in industrial production often contains water, alcohols, and other organic impurities, and direct discharge can easily cause environmental pollution and waste resources. In existing technologies, distillation is the mainstream method for separating and recovering 2-MeTHF; however, traditional tray methods suffer from reduced separation efficiency due to flooding or entrainment. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a separation and recovery device for waste dimethyltetrahydrofuran, thereby resolving the issues raised in the background section.

[0004] In view of this, the present invention provides a separation and recovery device for waste dimethyltetrahydrofuran, wherein a gas outlet is provided at the top of the distillation column, a gas outlet pipe is fixedly connected to the gas outlet, a feed pipe is fixedly connected to the side wall of the distillation column, and several sets of tray assemblies are provided on the inner wall of the distillation column.

[0005] A collection component is fixedly connected to the side wall of the exhaust pipe;

[0006] Cooling component, the outer surface of the collection component is provided with a cooling component.

[0007] In the above technical solution, the tray assembly further includes:

[0008] Plates: Several plates are fixedly installed inside the distillation column;

[0009] Nozzles: Several nozzles are fixedly installed through the plate.

[0010] Mounting rod: A mounting rod is fixedly connected inside the nozzle, and one end of the mounting rod is threaded.

[0011] The capped part is fixedly connected to one end of the mounting rod by a nut.

[0012] The grille has a fixed connection to the outer wall of the capped section.

[0013] In the above technical solution, furthermore, the outer side wall of the cap is horizontally fixedly connected with a grid.

[0014] In the above technical solution, furthermore, the outer side wall with the cap is inclinedly and fixedly connected with a grid.

[0015] In the above technical solution, the collection component further includes:

[0016] The collection box is fixedly connected to the outer wall of the vent pipe, and the bottom wall of the collection box is an inclined surface.

[0017] A collection tube is fixedly connected to one side of the collection box at an angle.

[0018] In the above technical solution, the top of the vent pipe is higher than the inclined bottom wall of the collection box.

[0019] In the above technical solution, the cooling component further includes:

[0020] The cooling tank is located on the outer wall of the collection tank. An inlet pipe is fixedly connected to the upper end of one side of the cooling tank, and an outlet pipe is fixedly connected to the lower end of the other side of the cooling tank.

[0021] In the above technical solution, furthermore, several support feet are fixedly installed at the bottom of the distillation column.

[0022] The beneficial effects of this utility model are as follows:

[0023] 1. A grid is fixedly connected to the outer side wall of the cap. The grid is made of stainless steel wire mesh and is used to disperse the gas and liquid phases and reduce mist entrainment.

[0024] 2. The cooling assembly condenses the gaseous dimethyltetrahydrofuran solution for collection, achieving the separation and recovery of waste dimethyltetrahydrofuran. 3. The top of the outlet pipe is higher than the sloping bottom wall of the collection tank to prevent backflow of the condensed solution. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0027] Figure 3 This is a utility model Figure 2 A magnified view of a section at point A in the middle;

[0028] Figure 4 This is another structural schematic diagram of the grille of this utility model;

[0029] Figure 5 This is a schematic diagram of the collection component structure of this utility model;

[0030] The markings are as follows: 1-Distillation column, 2-Gas outlet pipe, 3-Feed pipe, 4-Plate body, 5-Nozzle, 6-Mounting rod, 7-Capped, 8-Grate, 9-Collection box, 10-Collection pipe, 11-Cooling box, 12-Liquid inlet pipe, 13-Liquid outlet pipe, 14-Supporting foot. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0032] Example 1:

[0033] This embodiment provides a separation and recovery device for waste dimethyltetrahydrofuran, comprising:

[0034] Distillation column 1, with an outlet at the top of distillation column 1, an outlet pipe 2 fixedly connected to the outlet, a feed pipe 3 fixedly connected to the side wall of distillation column 1, and several sets of tray assemblies arranged on the inner wall of distillation column 1.

[0035] A collection component is fixedly connected to the side wall of the air outlet pipe 2;

[0036] Cooling component, the outer surface of the collection component is provided with a cooling component.

[0037] As can be seen in this embodiment, the distillation column 1 has a gas outlet at the top, and a gas outlet pipe 2 is fixedly connected to the gas outlet. A feed pipe 3 is fixedly connected to the side wall of the distillation column 1. Several sets of tray assemblies are arranged on the inner wall of the distillation column 1, and a heating plate is arranged at the bottom of the inner wall of the distillation column 1. The waste liquid is heated by the heating plate. Through the several sets of tray assemblies, the gas-liquid separation of dimethyltetrahydrofuran and impurities is realized. The vapor enters the collection assembly through the gas outlet pipe 2 at the top of the distillation column 1 for collection. A cooling assembly is arranged on the outer surface of the collection assembly. The gaseous dimethyltetrahydrofuran solution can be condensed by the cooling assembly and finally collected, realizing the separation and recovery of waste dimethyltetrahydrofuran.

[0038] Example 2:

[0039] This embodiment provides a separation and recovery device for waste dimethyltetrahydrofuran, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0040] The tray assembly includes:

[0041] Plate 4: Several plates 4 are fixedly installed inside the distillation column 1;

[0042] Nozzle 5, several nozzles 5 are fixedly installed through the plate 4;

[0043] Mounting rod 6 is fixedly connected inside nozzle 5, and one end of mounting rod 6 is threaded.

[0044] Cap 7, one end of mounting rod 6 is fixedly connected to cap 7 by nut;

[0045] The outer wall of the grille 8 is fixedly connected to the cap 7.

[0046] As can be seen in this embodiment, several plates 4 are fixedly installed inside the distillation column 1. Several nozzles 5 are fixedly installed through the plates 4. Several nozzles 5 are fixedly installed inside the nozzles 5. An installation rod 6 is fixedly connected inside the nozzles 5. One end of the installation rod 6 is threaded. The installation rod 6 is made of stainless steel. One end of the installation rod 6 is fixedly connected to a cap 7 by two nuts. The cap 7 is a hemispherical stainless steel cover. A grid 8 is fixedly connected to the outer wall of the cap 7. The grid 8 is made of stainless steel wire mesh and is used to disperse the gas and liquid phases and reduce mist entrainment.

[0047] Example 3:

[0048] This embodiment provides a separation and recovery device for waste dimethyltetrahydrofuran, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] The outer side wall of the cap 7 is horizontally fixedly connected with a grid 8.

[0050] As can be seen from this embodiment, the outer wall of the cap 7 is horizontally fixedly connected with a grid 8.

[0051] Example 4:

[0052] This embodiment provides a separation and recovery device for waste dimethyltetrahydrofuran, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0053] The outer side wall of the cap 7 is fixedly connected with a grid 8 at an angle.

[0054] As can be seen from this embodiment, the outer side wall of the cap 7 is fixedly connected with a grid 8 at an angle.

[0055] Example 5:

[0056] This embodiment provides a separation and recovery device for waste dimethyltetrahydrofuran, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0057] The collection components include:

[0058] The collection box 9 is fixedly connected to the outer wall of the air outlet pipe 2, and the bottom wall of the collection box 9 is an inclined surface.

[0059] A collection tube 10 is fixedly connected to one side of the collection box 9, and the collection tube 10 is set at an angle.

[0060] As can be seen in this embodiment, a collection box 9 is fixedly connected to the outer wall of the gas outlet pipe 2. The bottom wall of the collection box 9 is an inclined surface. The collection pipe 10 is connected to the lowest point of the inner wall of the collection box 9. The solution after the vapor liquefaction is driven by gravity to flow into the collection pipe 11 and be collected.

[0061] Example 6:

[0062] This embodiment provides a separation and recovery device for waste dimethyltetrahydrofuran, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] The top of the vent pipe 2 is higher than the sloping bottom wall of the collection box 9.

[0064] As can be seen in this embodiment, the top of the vent pipe 2 is higher than the inclined bottom wall of the collection box 9 to prevent the condensed solution from flowing back.

[0065] Example 7:

[0066] This embodiment provides a separation and recovery device for waste dimethyltetrahydrofuran, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0067] The cooling components include:

[0068] Cooling box 11 is provided on the outer wall of collection box 9. A liquid inlet pipe 12 is fixedly connected to the upper end of one side of cooling box 11, and a liquid outlet pipe 13 is fixedly connected to the lower end of the other side of cooling box 11.

[0069] As can be seen in this embodiment, an inlet pipe 12 is fixedly connected to the upper end of one side of the cooling box 11, through which circulating coolant at 5-15°C is introduced. An outlet pipe 13 is fixedly connected to the lower end of the other side of the cooling box 11, through which the coolant flows back to the refrigeration unit. The coolant in the cooling box 11 exchanges heat fully with the outer wall of the collection box 9, thereby improving the cooling efficiency.

[0070] Example 8:

[0071] This embodiment provides a separation and recovery device for waste dimethyltetrahydrofuran, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0072] Several support feet 14 are fixedly installed at the bottom of the distillation column 1.

[0073] As can be seen from this embodiment, several support feet 14 are fixedly installed at the bottom of the distillation column 1.

[0074] Working principle: Waste dimethyltetrahydrofuran solution is added to distillation column 1, and then heated by heating plate at the bottom of distillation column 1. The generated steam enters below capped plate 7 through nozzle 5, and then passes through grid 8, which increases the contact area, disperses the gas and liquid phases, and reduces mist entrainment. After passing through multiple tray components, dimethyltetrahydrofuran and impurities are separated into gas and liquid phases. The steam then enters collection box 9 through outlet pipe 2 at the top of distillation column 1. The gaseous dimethyltetrahydrofuran solution is condensed by heat exchange between the coolant in cooling box 11 and the outer wall of collection box 9. Finally, it is collected through collection pipe 10, realizing the separation and recovery of waste dimethyltetrahydrofuran.

[0075] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A separation and recovery device for waste dimethyltetrahydrofuran, characterized in that, include: A distillation column (1) is provided with an outlet at the top of the distillation column (1), and an outlet pipe (2) is fixedly connected to the outlet. A feed pipe (3) is fixedly connected to the side wall of the distillation column (1). Several sets of tray assemblies are provided on the inner wall of the distillation column (1). A collection component is fixedly connected to the side wall of the air outlet pipe (2); A cooling component is provided on the outer surface of the collection component; The tray assembly includes: Plate (4), a number of plates (4) are fixedly installed inside the distillation column (1); Nozzle (5), a number of nozzles (5) are fixedly installed through the plate (4); Mounting rod (6), the nozzle (5) is fixedly connected to the mounting rod (6), and one end of the mounting rod (6) is threaded; The mounting rod (6) is fixedly connected to the cap (7) by a nut at one end. The outer wall of the cap (7) is fixedly connected to the grille (8).

2. The separation and recovery device for waste dimethyltetrahydrofuran according to claim 1, characterized in that, The outer wall of the cap (7) is horizontally fixedly connected with a grid (8).

3. The separation and recovery device for waste dimethyltetrahydrofuran according to claim 1, characterized in that, The outer wall of the cap (7) is fixedly connected with a grid (8) at an angle.

4. The separation and recovery device for waste dimethyltetrahydrofuran according to claim 1, characterized in that, The collection component includes: The collection box (9) is fixedly connected to the outer wall of the air outlet pipe (2), and the bottom wall of the collection box (9) is an inclined surface; A collection tube (10) is fixedly connected to one side of the collection box (9) and is arranged at an angle.

5. The separation and recovery device for waste dimethyltetrahydrofuran according to claim 4, characterized in that, The top of the vent pipe (2) is higher than the inclined bottom wall of the collection box (9).

6. The separation and recovery device for waste dimethyltetrahydrofuran according to claim 5, characterized in that, The cooling assembly includes: Cooling box (11), the outer wall of the collection box (9) is provided with cooling box (11), the upper end of one side of cooling box (11) is fixedly connected with liquid inlet pipe (12), and the lower end of the other side of cooling box (11) is fixedly connected with liquid outlet pipe (13).

7. The separation and recovery device for waste dimethyltetrahydrofuran according to claim 1, characterized in that, The bottom of the distillation column (1) is fixedly provided with several support feet (14).

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