Membrane stripping device for tetrahydrofuran impurities

Abstract

The utility model relates to the technical field of chemical separation, in particular to a membrane stripping device for tetrahydrofuran impurities, which comprises a conveying channel, a heater and a membrane separation mechanism, the heater is mounted at one end in the conveying channel, a corner channel is vertically arranged at the discharge end of the conveying channel, a filter is inserted into one end in the corner channel, and the membrane separation mechanism is arranged in the corner channel. The bottom of the corner channel is provided with a liquid guide plate, the bottom of the liquid guide plate is provided with a membrane separation mechanism, the membrane separation mechanism comprises a polymer shell, a penetrating fluid gathering cylinder, a penetrating fluid collecting valve pipe, a concentrated liquid collecting valve pipe and pervaporation membranes, and the pervaporation membranes are arranged in the polymer shell. A penetrating fluid gathering cylinder is arranged at one end of the outer part of each group of pervaporation membranes; the utility model solves the problem that in the prior art, in the production and use process of tetrahydrofuran, trace impurities such as ethanol are often mixed in tetrahydrofuran, and the quality and application performance of tetrahydrofuran can be seriously influenced by the impurities.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical separation, and particularly relates to a membrane separation device for impurities in tetrahydrofuran. Background Technique

[0002] As an important organic solvent, tetrahydrofuran is widely used in fields such as chemical synthesis, pharmaceutical manufacturing, and electronic materials. However, during the production and use processes, trace impurities such as ethanol often mix into tetrahydrofuran, and the presence of these impurities will seriously affect the quality and application performance of tetrahydrofuran. Therefore, how to efficiently and with low energy consumption remove trace impurities in tetrahydrofuran has become an urgent problem to be solved in the field of chemical separation.

[0003] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a membrane separation device for impurities in tetrahydrofuran is proposed, in order to achieve a more practical value purpose. Content of the Utility Model

[0004] The purpose of the utility model is to provide a membrane separation device for impurities in tetrahydrofuran to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A membrane separation device for impurities in tetrahydrofuran includes a conveying channel, a heater, and a membrane separation mechanism. One end inside the conveying channel is equipped with a heater, and a corner channel is vertically arranged at the discharge end of the conveying channel. A filter is inserted into one end inside the corner channel, a liquid guiding plate is installed at the bottom of the corner channel, and a membrane separation mechanism is installed at the bottom of the liquid guiding plate. The membrane separation mechanism includes a polymer outer shell, a permeate gathering cylinder, a permeate collecting valve pipe, a concentrate collecting valve pipe, and a pervaporation membrane. The pervaporation membranes are arranged in an array inside the polymer outer shell, and permeate gathering cylinders are arranged at the outer ends of multiple groups of the pervaporation membranes, and a permeate collecting valve pipe is installed on the outer side of the permeate gathering cylinder. A concentrate collecting valve pipe is installed at the bottom of the other end outside the polymer outer shell.

[0006] Further, the pervaporation membrane is integrally in a hollow cylindrical structure, and multiple groups of the pervaporation membranes are arranged along the central axis of the polymer outer shell.

[0007] Further, the inner hollow end of the pervaporation membrane is connected to the permeate gathering cylinder, and the pervaporation membrane, the permeate gathering cylinder, and the permeate collecting valve pipe are interconnected.

[0008] Further, an external machine body is arranged on the outer side of the filter, and an adjustment slide rail is arranged between the top of the external machine body and the bottom wall of the conveying channel.

[0009] Further, a horizontal sliding structure is formed between the adjusting slide rail and the external machine body, and a horizontal plug-in connection is formed between the filter and the corner channel.

[0010] Further, a raw material tank interface is provided at the feeding end of the conveying channel.

[0011] Further, a protective frame is provided on the outer side of the polymer shell.

[0012] Further, the pervaporation membrane is made of a pervaporation membrane material with high selectivity and high flux, such as NaA type zeolite molecular sieve inorganic membrane, T type zeolite molecular sieve inorganic membrane or ZSM type zeolite molecular sieve inorganic membrane.

[0013] The utility model provides a membrane separation device for tetrahydrofuran impurities, which has the following beneficial effects:

[0014] 1. In the utility model, the pervaporation membrane adopts a pervaporation membrane material with high selectivity and high flux, has different permeation properties for tetrahydrofuran and impurities (such as ethanol), can realize the selective permeation of impurities, has high selectivity and high flux, and can efficiently remove trace impurities in tetrahydrofuran.

[0015] 2. In the utility model, through the pretreatment unit composed of a heater and a filter, the heater is used to heat the mixed liquid to an appropriate temperature to improve the membrane separation efficiency; the filter is used to remove solid particles and macromolecular impurities in the mixed liquid to protect the membrane module in the membrane separation unit. The setting of the pretreatment unit can protect the membrane module from the damage of solid particles and macromolecular impurities and extend the service life of the membrane module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Referring to the attached drawings, the disclosure of the utility model will become easier to understand. It is easy for those skilled in the art to understand that these drawings are only used to illustrate the technical solutions of the utility model and are not intended to limit the protection scope of the utility model. In the drawings:

[0017] Figure 1 is a schematic internal structure diagram of a membrane separation device for tetrahydrofuran impurities of the utility model;

[0018] Figure 2 is a schematic three-dimensional structure diagram of the permeate gathering cylinder of a membrane separation device for tetrahydrofuran impurities of the utility model;

[0019] Figure 3 is a schematic cross-sectional structure diagram of the pervaporation membrane of a membrane separation device for tetrahydrofuran impurities of the utility model.

[0020] In the figure: 1, conveying channel; 2, heater; 3, corner channel; 4, filter; 5, external body; 6, adjusting slide rail; 7, raw material tank interface; 8, liquid guide plate; 9, membrane separation mechanism; 901, polymer outer shell; 902, permeate gathering cylinder; 903, permeate collection valve pipe; 904, concentrate collection valve pipe; 905, pervaporation membrane; 10, protective frame. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-3 , the present invention provides a technical solution: a membrane removal device for tetrahydrofuran impurities, including a conveying channel 1, a heater 2 and a membrane separation mechanism 9. One end inside the conveying channel 1 is installed with a heater 2, and a corner channel 3 is vertically arranged at the discharge end of the conveying channel 1. One end inside the corner channel 3 is inserted with a filter 4. A liquid guide plate 8 is installed at the bottom of the corner channel 3, and a membrane separation mechanism 9 is installed at the bottom of the liquid guide plate 8. The membrane separation mechanism 9 includes a polymer outer shell 901, a permeate gathering cylinder 902, a permeate collection valve pipe 903, a concentrate collection valve pipe 904 and a pervaporation membrane 905. The pervaporation membranes 905 are arranged in an array inside the polymer outer shell 901, and permeate gathering cylinders 902 are arranged at the outer ends of multiple groups of pervaporation membranes 905. And a permeate collection valve pipe 903 is installed on the outer side of the permeate gathering cylinder 902. A concentrate collection valve pipe 904 is installed at the bottom of the other end outside the polymer outer shell 901; the pervaporation membrane 905 is integrally in a hollow cylindrical structure, and multiple groups of pervaporation membranes 905 are arranged along the central axis of the polymer outer shell 901; the inner hollow end of the pervaporation membrane 905 is connected to the permeate gathering cylinder 902, and the pervaporation membrane 905, the permeate gathering cylinder 902 and the permeate collection valve pipe 903 are interconnected; an external body 5 is arranged outside the filter 4, and an adjusting slide rail 6 is arranged between the top of the external body 5 and the bottom wall of the conveying channel 1; a horizontal sliding structure is formed between the adjusting slide rail 6 and the external body 5, and a horizontal plug-in connection is formed between the filter 4 and the corner channel 3; a raw material tank interface 7 is arranged at the feed end of the conveying channel 1; a protective frame 10 is arranged outside the polymer outer shell 901;

[0023] The pervaporation membrane 905 uses a pervaporation membrane material with high selectivity and high flux, which has different permeation properties for tetrahydrofuran and impurities such as ethanol, can achieve selective permeation of impurities, has high selectivity and high flux, and can efficiently remove trace impurities in tetrahydrofuran;

[0024] Through a pretreatment unit composed of a heater 2 and a filter 4, the heater 2 is used to heat the mixed liquid to an appropriate temperature to improve the membrane separation efficiency; the filter 4 is used to remove solid particles and macromolecular impurities in the mixed liquid to protect the membrane module in the membrane separation unit. The setting of its pretreatment unit can protect the membrane module from damage by solid particles and macromolecular impurities and extend the service life of the membrane module;

[0025] Both the heater 2 and the filter 4 are arranged in the conveying channel 1. By setting corner channels 3 with different transmission angles, the transmission speed of the internal mixed liquid is made different, so that the filtering effect of the filter 4 is better, and the filter 4 supports plug-in fitting and can be horizontally moved with the assistance of an adjusting slide rail 6, reducing the cleaning difficulty of the device in the subsequent process.

[0026] Working principle: For this type of tetrahydrofuran impurity removal device, first, through the raw material tank interface 7 at the top of the conveying channel 1, the mixed liquid enters the conveying channel 1 from the port of the raw material tank interface 7. At the same time, the inner heater 2 is started to raise the internal temperature of the conveying channel 1 to achieve heat treatment of the mixed liquid and heat the mixed liquid to an appropriate temperature. Then, the mixed liquid moves downward along the corner channel 3 and enters the filter 4 under the action of gravity to remove solid particles and macromolecular impurities in the mixed liquid. Then, the pretreated mixed liquid will enter the membrane separation mechanism 9 along the liquid guide plate 8. Multiple groups of pervaporation membranes 905 are arranged in the polymer shell 901 to form multiple groups of cylindrical channels, allowing the tetrahydrofuran mixed liquid to pass through and forming a concentration difference on both sides of the membrane, so as to achieve selective permeation and separation of impurities, and the permeate collection valve tube 903 and the concentrate collection valve tube 904 on both sides are used for recovery treatment respectively;

[0027] Adjust the heating temperature of the mixed liquid and the type selection of the membrane module according to actual production needs. For example, when the tetrahydrofuran mixed liquid contains more ethanol impurities, a membrane module with higher selectivity for ethanol can be selected; when it is necessary to improve the membrane separation efficiency, the heating temperature of the mixed liquid can be appropriately increased.

[0028] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present invention without creative labor should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A membrane removal device for tetrahydrofuran impurities, comprising a transport channel (1), a heater (2) and a membrane separation mechanism (9), characterized in that: A heater (2) is installed at one end of the interior of the conveying channel (1), and a corner channel (3) is vertically arranged at the discharge end of the conveying channel (1), a filter (4) is inserted into one end of the interior of the corner channel (3), a liquid guide plate (8) is installed at the bottom of the corner channel (3), and a membrane separation mechanism (9) is installed at the bottom of the liquid guide plate (8), and the membrane separation mechanism (9) comprises a polymer shell (901), a permeate gathering cylinder (902), and a permeate collection valve pipe (903). 03), a concentrate collecting valve tube (904) and a pervaporation membrane (905), the pervaporation membrane (905) is arranged inside the polymer shell (901), and a pervaporation liquid gathering cylinder (902) is arranged at one end of the outside of the multiple groups of pervaporation membranes (905), and a permeate collecting valve tube (903) is installed on the outside of the permeate gathering cylinder (902), and a concentrate collecting valve tube (904) is installed at the bottom of the other end of the outside of the polymer shell (901).

2. A membrane removal device for tetrahydrofuran impurities according to claim 1, characterized in that: The pervaporation membrane (905) is in the form of a hollow cylinder as a whole, and multiple groups of pervaporation membranes (905) are arranged along the central axis of the polymer shell (901).

3. A membrane removal device for tetrahydrofuran impurities according to claim 1, characterized in that: The inner hollow end of the pervaporation membrane (905) is connected to the permeate gathering cylinder (902), and the pervaporation membrane (905), the permeate gathering cylinder (902) and the permeate collecting valve tube (903) are interconnected.

4. A membrane removal device for tetrahydrofuran impurities according to claim 1, characterized in that: An external body (5) is arranged on the outside of the filter (4), and an adjustment slide rail (6) is arranged on the top of the external body (5) and the bottom wall of the conveying channel (1).

5. A membrane removal device for tetrahydrofuran impurities according to claim 4, characterized in that: A horizontal sliding structure is formed between the adjusting slide rail (6) and the external body (5), and a horizontal plug-in connection is formed between the filter (4) and the corner channel (3).

6. A membrane removal device for tetrahydrofuran impurities according to claim 1, characterized in that: The feed end of the conveying channel (1) is provided with a raw material tank interface (7).

7. A membrane removal device for tetrahydrofuran impurities according to claim 1, characterized in that: A protective frame (10) is provided on the outer side of the polymer shell (901).

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