A four-fluoride gas-liquid separator

Abstract

The utility model relates to chemical experiment equipment field especially involves a kind of tetrafluoro gas-liquid separator, solve the separation problem that gas-liquid separator cannot adapt corrosive gas-liquid mixture material in prior art, corrosive gas-liquid mixture material can be effectively separated, simple structure. Including, cylindrical casing, its bottom is equipped with bottom plate, its top is equipped with top cover;Tubular tetrafluoro filter core, it is made of tetrafluoro polyethylene material, its lower end is sealed bottom, its upper end is open and connected in the bottom surface of top cover, its side wall is densely covered with filter core hole.

Description

Technical Field

[0001] This utility model relates to the field of chemical experimental equipment, and in particular to a tetrafluoroethylene gas-liquid separator. Background Technology

[0002] A chemical laboratory is an important place that provides conditions for chemical experiments and scientific research. It contains a large number of instruments used for various chemical experiments. Because chemical substances and substances that are irritating to the skin can easily cause harm to workers during chemical experiments, safety precautions must be taken seriously. In addition to the damage to the human body caused by chemical reagents, many chemical reagents produce corrosive gases or generate such gases, which are usually in a gas-liquid mixture. When recycling, gas-liquid separation is often required.

[0003] However, gas-liquid separators are mostly used in chemical industrial production, but rarely in chemical experiments. This is due to their large size, complex structure, and high manufacturing cost. Although some gas-liquid separators can be used in chemical experiments, many gases are corrosive, resulting in poor separation effect. Utility Model Content This invention provides a PTFE gas-liquid separator that solves the problem that existing gas-liquid separators cannot adapt to the separation of corrosive gas-liquid mixtures. It can effectively separate corrosive gas-liquid mixtures and has a simple structure.

[0004] This utility model is achieved through the following technical solution: A PTFE gas-liquid separator, comprising, A cylindrical shell with a bottom plate at the bottom and a top cover at the top; The tubular PTFE filter element is made of PTFE material. Its lower end is sealed, and its upper end is open and connected to the bottom surface of the top cover. Its side walls are densely covered with filter element holes. The feed inlet is located on the side wall of the housing near the bottom plate; The liquid outlet is located on the bottom surface of the base plate; The gas outlet is located on the side of the top cover and is connected to the PTFE filter element.

[0005] Furthermore, the housing is provided with a horizontally distributed filter assembly, which is located below the PTFE filter element and is positioned above the feed inlet.

[0006] Furthermore, the filter assembly is a demisting mesh or a filter plate with a dense array of filter holes.

[0007] Furthermore, when the filter component is a defogging screen, the mesh size of the defogging screen is 1-2 mm; When the filter assembly is a filter plate, the pore size of the filter plate is 1-2 mm.

[0008] Furthermore, the top cover is provided with vertically distributed connecting channels, the lower end of the connecting channels is connected to the upper end of the PTFE filter element, and the gas outlet is connected to the side wall of the connecting channels; A pressure gauge is installed above the top cover, and the detection pipe of the pressure gauge is connected to the upper end of the connecting channel.

[0009] Furthermore, a bracket is installed on the top cover, and the pressure gauge is fixed on the bracket.

[0010] Furthermore, the inner wall of the housing is provided with an annular platform, the outer contour of the filter assembly is disc-shaped, and the filter assembly is assembled on the annular platform.

[0011] Furthermore, the bottom center of the top cover is provided with an inner mounting hole that communicates with the connecting channel, and the upper end of the PTFE filter element is mounted on the inner mounting hole.

[0012] Furthermore, connection ports are installed on the feed inlet, liquid outlet, and gas outlet.

[0013] The beneficial effects achieved by this utility model compared with the prior art are as follows: 1. During the experiment, a corrosive gas and liquid mixture enters the shell through the inlet. Part of the liquid automatically settles to the bottom and is discharged from the liquid outlet at the bottom; the other part rises with the gas. When this gas-liquid mixture passes through the PTFE filter element, the liquid is blocked on the outer wall of the PTFE filter element and flows downward along the outer wall of the PTFE filter element, exiting from the liquid outlet at the bottom. The gas, on the other hand, passes through the PTFE filter element and is discharged from the upper gas outlet on the side of the separator. This achieves gas-liquid separation. The PTFE filter element is made of PTFE material, which has good corrosion resistance and allows only gas to pass through, thus having good filtration performance. 2. The filter component of this utility model is a demisting mesh or a filter plate with a number of filter holes, which can initially filter the liquid in the gas, thereby improving the gas-liquid separation efficiency. 3. An inner mounting hole communicating with the connecting channel is provided at the bottom center of the top cover. The upper end of the PTFE filter element is assembled on the inner mounting hole. This utility model has a simple structure and is easy to disassemble. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the PTFE gas-liquid separator described in this utility model; Figure 2 This is a schematic diagram showing the connection between the PTFE gas-liquid separator of this utility model and the experimental equipment; Figure 3 This is a top view of the defogging mesh described in this utility model; Figure 4 This is a top view of the filter plate described in this utility model; In the diagram: 1. Housing, 2. Top cover, 3. PTFE filter element, 4. Inlet, 5. Liquid outlet, 6. Gas outlet, 7. Filter assembly, 8. Connecting channel, 9. Pressure gauge, 10. Circular platform. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0016] In the description of the utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0017] Example 1 This embodiment discloses a PTFE gas-liquid separator, such as... Figure 1 As shown, the main components include a housing 1, a PTFE filter element 3, a filter assembly 7, a pressure gauge 9, and a support frame. The housing 1, filter assembly 7, and PTFE filter element 3 are all made of PTFE material, which provides excellent corrosion resistance to corrosive substances such as strong acids (concentrated sulfuric acid (over 98%), concentrated hydrochloric acid, nitric acid, hydrofluoric acid, phosphoric acid, etc.), strong alkalis (sodium hydroxide, potassium hydroxide, etc.), and organic solvents (ethanol, acetone, methanol, etc.).

[0018] The housing 1 is a cylindrical structure with a base plate at the bottom and a top cover 2 attached to the top via a threaded connection. The PTFE filter element 3 is a tubular structure made of PTFE material, with a sealed bottom and an open top. The PTFE filter element 3 has numerous filter holes with a diameter of 5-10 nm on its circumferential wall, effectively filtering liquids carried in the gas. An internal mounting hole is machined at the center of the bottom of the top cover 2. The upper end of the PTFE filter element is threaded or plugged into this hole, allowing for detachable assembly of the PTFE filter element 3 and the top cover 2.

[0019] A feed inlet 4 is machined on the side wall of the shell 1 near the bottom plate, and a liquid outlet 5 is machined on the bottom surface of the bottom plate of the shell 1. Vertically distributed connecting channels 8 are machined at the center of the top cover 2, and the lower end of the connecting channel 8 connects to the upper end of the PTFE filter element through an internal mounting hole. A gas outlet 6 is machined on the side wall of the top cover 2, and the gas outlet 6 connects to the side wall of the connecting channel 8. To monitor the pressure inside the entire container in real time, a pressure gauge 9 is installed above the top cover 2, and the detection pipe of the pressure gauge 9 connects to the upper end of the connecting channel 8. A bracket is installed on the top cover 2 to fix the pressure gauge 9 to the bracket.

[0020] like Figure 3 As shown, the filter assembly 7 has a disc-shaped outer contour and is laterally distributed within the housing 1. The filter assembly 7 is located below the PTFE filter element 3 and is positioned higher than the feed inlet 4. To facilitate the positioning of the filter assembly 7, an annular platform 10 is machined on the inner wall of the housing 1, and the filter assembly 7 is mounted on the annular platform 10. In this embodiment, the filter assembly 7 is a demister mesh with a mesh size of 1-2 mm.

[0021] To facilitate connection of this device with experimental equipment and instruments, connection ports are installed on the inlet 4, liquid outlet 5, and gas outlet 6.

[0022] like Figure 2 As shown, taking the oxidation reaction experiment in the chlor-alkali industry (preparing sodium hypochlorite from chlorine and sodium hydroxide solution) as an example, the feed inlet 4 is connected to the gas-liquid mixer experimental equipment via a pipeline, the liquid outlet 5 is connected to the liquid recovery tank via a pipeline, and the gas outlet 6 is connected to the gas recovery tank via a pipeline. The gas-liquid mixer experimental equipment will produce a sodium hypochlorite gas-liquid mixture, which is corrosive. During the reaction, some gas may not react completely. The gas in this mixture is mainly the reactant chlorine gas. Therefore, we need to separate the gas from the liquid and then recover and reuse it. The specific steps are as follows: A corrosive gas and liquid mixture enters the housing through the inlet, with an overall input pressure of approximately 1 MPa. Most of the liquid automatically settles to the bottom and is discharged from the liquid outlet at the bottom. The remaining portion rises with the gas, passing through a demister screen that traps mist droplets. Then, it passes through a PTFE filter. As this gas-liquid mixture passes through the filter pores of the PTFE filter, the liquid is blocked on the outer wall of the filter and flows downwards along the outer wall, exiting from the liquid outlet at the bottom. The gas, on the other hand, passes through the PTFE filter and is discharged from the upper outlet on the side of the separator, thus separating most of the chlorine gas and achieving gas-liquid separation.

[0023] The aforementioned PTFE gas-liquid separator solves the problem that existing gas-liquid separators cannot handle corrosive gas-liquid mixtures. It can effectively separate corrosive gas-liquid mixtures, has a simple overall structure, and low manufacturing cost.

[0024] Example 2 This embodiment discloses a PTFE gas-liquid separator. Unlike Embodiment 1, the filter assembly 7 is a circular filter plate, such as... Figure 4 As shown, the filter plate is densely covered with several filter holes with a diameter of 1-2 mm.

[0025] Taking the chlorination reaction for preparing 1,2-dichloropropane from chlorine and liquid propylene as an example, inlet 4 is connected to the gas-liquid mixer experimental equipment via a pipeline, liquid outlet 5 is connected to the liquid recovery tank via a pipeline, and gas outlet 6 is connected to the gas recovery tank via a pipeline. During the reaction that produces the 1,2-dichloropropane gas-liquid mixture, some chlorine may not react completely.

[0026] According to the technical solution of this application, a corrosive gas and liquid mixture enters the housing through the inlet with an overall input pressure of approximately 1 MPa. Most of the liquid will automatically settle to the bottom and be discharged from the liquid outlet at the bottom. The other part will rise with the gas and, when passing through the filter plate, will trap the mist droplets in the gas. Then, it will pass through the PTFE filter element. When this part of the gas-liquid mixture passes through the filter element pores, the liquid will be blocked on the outer wall of the PTFE filter element and flow downward along the outer wall of the PTFE filter element, exiting from the liquid outlet at the bottom. The gas, on the other hand, will pass through the PTFE filter element and be discharged from the upper gas outlet on the side of the separator, thereby achieving gas-liquid separation.

Claims

1. A PTFE gas-liquid separator, characterized in that, Including, A cylindrical shell (1) has a bottom plate at the bottom and a top cover (2) at the top. The tubular PTFE filter element (3) is made of PTFE material. Its lower end is sealed, and its upper end is open and connected to the bottom surface of the top cover (2). Its sidewalls are densely covered with filter element holes. The feed inlet (4) is located on the side wall of the housing (1) near the bottom plate; A liquid outlet (5) is located on the bottom surface of the base plate; Gas outlet (6) is located on the side of the top cover (2) and connected to the PTFE filter element (3).

2. The PTFE gas-liquid separator according to claim 1, characterized in that, The housing (1) is provided with a horizontally distributed filter assembly (7), which is located below the PTFE filter element (3) and is positioned higher than the feed inlet (4).

3. The PTFE gas-liquid separator according to claim 2, characterized in that, The filter assembly (7) is a demisting mesh or a filter plate with a number of filter holes.

4. The PTFE gas-liquid separator according to claim 3, characterized in that, When the filter component (7) is a demisting mesh, the mesh size of the demisting mesh is 1-2 mm; When the filter assembly (7) is a filter plate, the filter hole diameter of the filter plate is 1-2 mm.

5. The PTFE gas-liquid separator according to claim 2, characterized in that, The top cover (2) is provided with vertically distributed connecting channels (8), the lower end of the connecting channel (8) is connected to the upper end of the PTFE filter element, and the gas outlet (6) is connected to the side wall of the connecting channel (8). A pressure gauge (9) is provided above the top cover (2), and the detection pipe of the pressure gauge (9) is connected to the upper end of the connecting channel (8).

6. The PTFE gas-liquid separator according to claim 5, characterized in that, A bracket is installed on the top cover (2), and the pressure gauge (9) is fixed on the bracket.

7. The PTFE gas-liquid separator according to claim 2, characterized in that, The inner wall of the housing (1) is provided with an annular platform (10), and the outer contour of the filter assembly (7) is disc-shaped. The filter assembly (7) is mounted on the annular platform (10).

8. The PTFE gas-liquid separator according to claim 5, characterized in that, The bottom center of the top cover (2) is provided with an inner mounting hole that connects to the connecting channel (8), and the upper end of the PTFE filter element is mounted on the inner mounting hole.

9. The PTFE gas-liquid separator according to any one of claims 1-8, characterized in that, Connection ports are installed on the feed inlet (4), liquid outlet (5) and gas outlet (6).

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