CN204261576U - Dynamic gas mixing device - Google Patents

Abstract

The utility model provides a dynamic gas mixing device. The dynamic gas mixing device includes: a main air intake pipe, at least one branch air intake pipe, and a gas mixing straight pipe. The ends are connected, and the branch air intake pipe is arranged on the side wall of the main air intake pipe and communicates with the main air intake pipe, and forms an included angle not greater than 90 degrees between the branch air intake pipe and the main air intake pipe along the gas flow direction; the mixed gas straight pipe There is at least one porous screen along the axial direction, and the outer edge of the porous screen is fixed on the inner wall of the gas mixing straight pipe. The dynamic gas mixing device provided by the utility model passes through the branch air intake pipe, the main air intake pipe and The structure of the straight gas pipe does not need to extend the air flow path, nor does it need to be equipped with other complicated gas mixing structural devices, and can realize dynamic and efficient mixing of the gas to be mixed, improve the gas mixing effect, and realize the rapid and uniform flow of gas during the circulation process. mix.

Description

Dynamic Mixer

technical field

The utility model relates to a dynamic gas mixing device, in particular to a dynamic gas mixing device for mixing more than two kinds of gases in the pipeline flow process.

Background technique

Gas mixers are widely used in gas phase reactions and are mainly used to uniformly mix two or more gases together.

At present, gas pipeline mixers are generally used to mix two or more gases when mixing gases with relatively large gas fluxes. For the mixing of trace gases, especially active gases with adsorption properties, the structure is generally complex and difficult to process and manufacture. Big mixer.

For the existing pipeline gas mixer, in order to make the gas mix evenly, it is often adopted to increase the length of the pipeline to achieve the uniformity of the gas mixture, or to adopt a circuitous turbulent flow structure to achieve the uniformity of the gas mixture.

However, increasing the length of the pipeline to achieve the uniformity of gas mixing will delay the output time of the final mixed gas, and using a circuitous turbulent flow structure will destroy the smoothness of the air flow and there will be dead ends of the air flow.

Utility model content

The utility model provides a dynamic gas mixing device, which improves the gas mixing effect and realizes the rapid and uniform mixing of the gas in the circulation process.

The utility model provides a dynamic gas mixing device, comprising:

The main air intake pipe, at least one branch air intake pipe, and the mixed air straight pipe, wherein,

The exhaust end of the main air intake pipe communicates with the air intake end of the mixed gas straight pipe, and the branch air intake pipe is arranged on the side wall of the main air intake pipe and communicates with the main air intake pipe, and flows along the gas flow to all The angle between the branch air intake pipe and the main air intake pipe is not greater than 90 degrees;

At least one porous screen is arranged in the axial direction in the straight gas mixing pipe, and the outer edge of the porous screen is fixed to the inner wall of the straight gas mixing pipe.

In a specific embodiment of the present utility model, the sum of the cross-sectional areas of the plurality of mesh openings on the perforated screen is greater than 60% of the cross-sectional area of the straight gas-mixing pipe.

In a specific embodiment of the present utility model, the axes of the mesh openings on the perforated screen are parallel to or coincident with the axes of the straight gas mixing pipe.

In the dynamic gas mixing device of the present utility model, the number of porous screens in the gas mixing straight pipe is more than two, and they are arranged at intervals.

In the dynamic gas mixing device of the present utility model, the thickness of the porous net plate is 3-5 mm.

In the dynamic air mixing device of the present utility model, the main air intake pipe, the branch air intake pipe and the air mixing straight pipe are all polytetrafluoroethylene pipes, and/or the porous mesh plate is a polytetrafluoroethylene plate .

In a specific embodiment of the present utility model, the diameter of the connection between the branch air intake pipe and the main air intake pipe is smaller than the pipe diameter of the main air intake pipe.

In a specific embodiment of the present utility model, the exhaust end of the main air intake pipe is inserted into the air intake end of the gas mixing straight pipe.

In a specific embodiment of the utility model, the main air intake pipe and the gas mixing straight pipe are integrally formed.

The dynamic air mixing device of the utility model is used in the air mixing operation, and the gas to be mixed is sent in from the main intake pipe and the branch air intake pipe respectively, and the air flows in the main air intake pipe and flows through the main air intake pipe together to enter the mixed air Straight pipe, the first mixing of gases occurs in this process, the mixed gas flow needs to flow through the mesh holes of the porous mesh plate in the flow of the gas mixing straight pipe, the flow velocity will change to generate jets and form a turbulent state, every time it flows through A perforated stencil gas is mixed again, and the structure of the gas mixing straight pipe also ensures the smooth flow of air, there is no dead angle of air flow, and finally realizes the full mixing of various gases.

It can be understood that the dynamic gas mixing device provided by the utility model may also include necessary delivery equipment, such as a gas delivery pump and supporting facilities.

In a word, the dynamic air mixing device of the present utility model, through the structural arrangement of the branch air intake pipe, the main air intake pipe and the air mixing straight pipe, does not need to extend the air flow path, nor does it need to be equipped with other complicated air mixing structural devices, and can make the air to be mixed The gases are mixed dynamically and efficiently.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model dynamic gas mixing device.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The dynamic gas mixing device provided in this embodiment is used to effectively mix two or more kinds of gases uniformly during pipeline flow. Fig. 1 is a structural schematic diagram of the utility model dynamic gas mixing device, as shown in Fig. 1, the dynamic gas mixing device comprises:

Main air intake pipe 1, at least one branch air intake pipe 2, mixed gas straight pipe 3, wherein the branch air intake pipe 2 is arranged on the side wall of the main air intake pipe 1 and communicates with the main air intake pipe 1, meanwhile, in order to ensure that the main air intake pipe 1 The gas with the branch inlet pipe 2 can enter the mixed gas straight pipe 3 together. In this embodiment, an angle not greater than 90 degrees is formed between the branch inlet pipe 2 and the main inlet pipe 1 along the gas flow direction, as shown in Figure 1 , the branch air intake pipes 2 can be evenly distributed axially along the side wall of the main air intake pipe 1, the branch air intake pipes 2 can also be distributed along the radial direction of the side wall of the main air intake pipe 1, or the branch air intake pipes 2 can be distributed along the main air intake pipe The side wall of 1 is distributed both axially and radially. Regardless of the distribution, in this embodiment, the diameter of the connection between the branch air intake pipe 2 and the main air intake pipe 1 is smaller than the pipe diameter of the main air intake pipe 1. In this embodiment, Among them, the main air intake pipe 1 is used to pass one kind of gas, and the branch air intake pipe 2 is used to pass in other gases, wherein the number of branch air intake pipe 2 is at least one, that is, when there are multiple gases mixed, A plurality of branch air intake pipes 2 can be set to pass other gases. In this embodiment, the number of branch air intake pipes 2 can be set according to actual applications. It is not limited in this embodiment. In this embodiment, the branch air intake pipes The intake pipe 2 communicates with the main intake pipe 1, and the main intake pipe 1 communicates with the gas mixing straight pipe 3. Specifically, the exhaust end of the main intake pipe 1 communicates with the intake end of the gas mixing straight pipe 3. What needs to be explained Yes, the main intake pipe 1 and the mixed gas straight pipe 3 can be replaced by a straight pipe, wherein one end of the straight pipe is the main air intake pipe 1, and the other end of the straight pipe is the mixed gas straight pipe 3, thus avoiding the use of branches The problem of connecting the intake pipe 2 and the main intake pipe 1, or the main intake pipe 1 and the gas mixing straight pipe 3 are straight pipes with different diameters, and the exhaust end of the main intake pipe 1 is inserted At the air intake end of the gas mixing straight pipe 3, or the main air intake pipe 1 and the gas mixing straight pipe 3 are integrally formed.

In this embodiment, at least one porous screen 4 is arranged in the axial direction in the gas mixing straight pipe 3, and the outer edge of the porous screen is fixed on the inner wall of the gas mixing straight pipe 3. In this embodiment, the number of porous screens 4 For at least one, that is, in order to make the gas mix quickly and evenly, a porous net plate 4 can be set in the gas mixing straight pipe 3, and a plurality of porous net plates 4 can also be set, wherein a plurality of nets are opened on the porous net plate 4. For example, 10-15 mesh holes can be set up. It should be noted that the aperture of the mesh cannot be too small to hinder the air flow. In this embodiment, the flow rate of the gas will change when passing through the mesh. Jet and turbulent state are generated between them, so that various gases are fully mixed with each other evenly. Moreover, in this embodiment, the gas mixing straight pipe 3 is a straight pipe with a simple structure. There is a dead angle of air flow, and finally realize the full mixing of various gases.

When the dynamic gas mixing device of this embodiment is working, the main intake pipe 1 is fed into a kind of gas, and the branch intake pipe 2 is fed into other gases, and the gases that are passed into the main intake pipe 1 and the branch intake pipe 2 converge. Afterwards, it is initially mixed and enters into the mixed gas straight pipe 3 together. After the mixed gas reaches the perforated net plate 4, due to the shrinkage of the aperture, the gas will have a change in flow rate when flowing through each mesh, and jet and turbulent flow will occur. State, so that the various gases are fully mixed with each other, and then realize the efficient and dynamic mixed gas process.

In the dynamic air mixing device provided in this embodiment, at least one branch air intake pipe is distributed along the axial or radial direction of the main air intake pipe and communicated with the main air intake pipe. At least one porous screen is set in the gas straight pipe, and a plurality of mesh holes are opened on the porous screen. The air flow will flow through the main air intake pipe together and enter the mixed gas straight pipe. During this process, the first gas flow occurs Secondary mixing, the mixed gas flow needs to flow through the mesh holes of the porous mesh plate in the flow of the gas mixing straight pipe, the flow rate will change to generate a jet and form a turbulent state, and the gas will be mixed again every time it flows through a porous mesh plate. In the end, various gases are fully mixed with each other, and the structure of the gas mixing straight pipe also ensures smooth air flow, and there is no dead angle of air flow, so that various gases are fully mixed with each other evenly.

Further, on the basis of the above-mentioned embodiments, in this embodiment, when a plurality of meshes are opened on the perforated screen 4, the sum of the cross-sectional areas of the plurality of meshes is greater than 60% of the cross-sectional area of the gas-mixing straight pipe 3, Because when the cross-sectional area of multiple mesh holes is small, although it can ensure that the gas is mixed evenly, the output time of the mixed gas will be delayed. When 60% of , the number of meshes should not be too small, that is, the cross-sectional area of meshes should not be too large. Therefore, when multiple meshes are set (for example, 12 meshes are set), the cross-sectional area of multiple meshes The sum of the areas can be 70% of the cross-sectional area of the gas-mixing straight pipe 3, which not only avoids the obstruction of the airflow during the gas mixing process, but also ensures the sufficient mixing of the airflow. Therefore, the dynamic gas-mixing provided by this embodiment The device ensures the smooth flow of the mixed gas, quickly outputs the mixed gas, and realizes the efficient and dynamic mixing of various gases.

Further, the axis of the mesh that offers on the perforated screen 4 is parallel to or coincides with the axis of the gas mixing straight pipe 3, that is, the perforated screen 4 is vertically arranged in the gas mixing straight pipe 3, like this, can reduce porous The barrier of the mesh plate 4 to the air flow, further, in order to reduce the blocking effect of the mesh on the gas, in the present embodiment, the thickness of the porous mesh plate 4 is 3-5mm, for example, it can be 4mm, in the present embodiment, the porous mesh plate 4 After inserting the air mixing straight pipe 3, you can use hot air to blow the outer surface of the air mixing straight pipe 3 until the material is slightly softened, and then put it into cold water to produce shrinkage, and fix the perforated mesh plate 4 in the air mixing straight pipe 3.

Further, the quantity of the perforated screens 4 in the gas-mixing straight pipe 3 is more than two, as shown in Figure 1, two porous screens 4 are arranged in the gas-mixing straight pipe 3 at intervals, when the gas passes through the two porous screens The function of the plate 4 can further improve the mixing effect of various gases.

Further, in order to reduce the adsorption effect of the gas mixing device on the active gas, in this embodiment, the polytetrafluoroethylene material with the least adsorption to the active gas is selected, that is, the main air intake pipe 1, the branch air intake pipe 2 and the gas mixing straight pipe 3 all select polytetrafluoroethylene tubes for use, and the porous screen 4 selects polytetrafluoroethylene plates for use, so that when the gas mixing device is used for mixing active gases with adsorption properties, it will not generate adsorption to the active gases.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (9)

1. A dynamic gas mixing device, characterized in that, comprising: The main air intake pipe, at least one branch air intake pipe, and the mixed air straight pipe, wherein, The exhaust end of the main air intake pipe communicates with the air intake end of the mixed gas straight pipe, and the branch air intake pipe is arranged on the side wall of the main air intake pipe and communicates with the main air intake pipe, and flows along the gas flow to all The angle between the branch air intake pipe and the main air intake pipe is not greater than 90 degrees; At least one porous screen is arranged in the axial direction in the straight gas mixing pipe, and the outer edge of the porous screen is fixed to the inner wall of the straight gas mixing pipe. 2. The dynamic gas mixing device according to claim 1, characterized in that the sum of the cross-sectional areas of the plurality of mesh openings on the porous screen is greater than 60% of the cross-sectional area of the straight gas mixing pipe. 3. The dynamic gas mixing device according to any one of claims 1, characterized in that, the axis of the mesh opened on the perforated screen is parallel to or coincident with the axis of the straight gas mixing pipe. 4. The dynamic gas mixing device according to any one of claims 1-3, characterized in that the number of perforated screens in the gas mixing straight pipe is more than two and arranged at intervals. 5. The dynamic gas mixing device according to any one of claims 1-3, characterized in that, the thickness of the porous net plate is 3-5 mm. 6. The dynamic air mixing device according to any one of claims 1-3, wherein the main air intake pipe, the branch air intake pipe and the air mixing straight pipe are polytetrafluoroethylene pipes, and /or the porous mesh plate is a polytetrafluoroethylene plate. 7. The dynamic air mixing device according to any one of claims 1-3, characterized in that, the pipe diameter of the connection between the branch air intake pipe and the main air intake pipe is smaller than the pipe diameter of the main air intake pipe. 8. The dynamic air mixing device according to any one of claims 1-3, wherein the exhaust end of the main air intake pipe is inserted into the air intake end of the straight air mixing pipe. 9. The dynamic air mixing device according to any one of claims 1-3, characterized in that, the main air intake pipe and the straight air mixing pipe are integrally formed.