Special gas-liquid two-phase mixing equipment

Abstract

The utility model relates to special gas-liquid two-phase mixing equipment, in particular to static gas-liquid two-phase mixing equipment belonging to the field of fluid mixing equipment, which is characterized in that a baffle plate is arranged to guide fluid, the kinetic energy of the fluid is used for mixing, the overall pressure drop is lower, and the mixing efficiency is higher; the problems that when an existing conventional static mixer is used in a gas-liquid two-phase mixing working condition, resistance loss is large, and blocking is prone to occurring are solved.

Description

Technical Field

[0001] This utility model relates to a special gas-liquid two-phase mixing device, specifically a static gas-liquid two-phase mixing device belonging to the field of fluid mixing equipment. Background Technology

[0002] The increasing trend towards heavier crude oil, coupled with rising demand for cleaner oil products and increasingly stringent quality requirements, has placed higher demands on the secondary processing capabilities of petroleum refining enterprises. Currently, secondary processing units in petroleum refining enterprises primarily consist of coking, catalytic cracking, hydrotreating, and catalytic reforming. With the upgrading of my country's petroleum products, hydrotreating has become an indispensable process route for refining enterprises. The existing hydrotreating process involves fresh feedstock, recycled oil, and hydrogen passing through a mixing unit to dissolve the hydrogen in the feedstock. The hydrogen-dissolved feedstock then enters a reactor where it contacts a catalyst for a hydrotreating reaction, removing impurities from the feedstock. After the reaction, a portion of the effluent is recycled back to the hydrogen mixing unit, while the remainder is discharged as product. In this process, the oil-hydrogen mixing equipment is a critical component, significantly impacting the unit's operating efficiency.

[0003] In existing hydrogenation equipment, the mixing equipment for oil and hydrogen generally uses a conventional static mixer. Its structure is generally composed of multiple sets of guide plates that are not parallel to the axis. After the gas and liquid fluids enter the same upstream pipe at the same time, they enter the mixing equipment. When flowing through the mixing equipment, they sometimes rotate to the left and sometimes to the right, constantly changing the flow direction. This not only pushes the central fluid of the ideal parallel flow to the periphery, but also pushes the peripheral fluid to the center, thereby achieving the mixing effect.

[0004] However, conventional static mixers have a large overall size due to the use of multiple guide vanes, which increases friction loss. In addition, the small channel area makes them prone to blockage, which is not conducive to the long-term stable operation of the device. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model provides a special gas-liquid two-phase mixing device to solve the problems of large resistance loss and easy blockage when existing conventional static mixers are used in gas-liquid two-phase mixing conditions.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] A special gas-liquid two-phase mixing device includes a baffle plate and a guide pipe. The baffle plate is connected to the inner circular surface of the pipe wall at the installation position, and the guide pipe passes through the pipe wall and extends into the back of the baffle plate to form the special gas-liquid two-phase mixing device.

[0008] The baffle plate is curved, which causes the mainstream fluid flowing through the baffle plate to form a vortex at its tail, thereby rapidly mixing with the secondary fluid entering from the guide pipe.

[0009] The number of baffles is multiple, and they are distributed and connected to the inner circular surface of the pipe wall at the installation location according to the usage.

[0010] The outlet of the guide pipe faces the tail of the baffle plate, guiding the mainstream fluid to the vortex formed at the tail of the baffle plate.

[0011] The number of guide tubes is the same as the number of baffles.

[0012] By adopting the above technical solution, this utility model has the following advantages:

[0013] This invention uses a baffle plate on the inner circular surface of the pipe wall at the installation location to create a vortex flow as the mainstream fluid passes through the baffle plate. At the same time, the secondary fluid being mixed enters from the guide pipe and reaches the vortex flow position. The secondary fluid shears with the mainstream fluid and enhances the turbulence, thereby achieving the effect of enhancing the mixing.

[0014] This invention features low overall pressure drop, good mixing effect, simple overall structure, long service life, and low cost, making it suitable for various industries requiring mixing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the special gas-liquid two-phase mixing device described in this utility model;

[0016] Figure 2 This is a schematic diagram of a partial mixing structure (single mixing position) of the baffle plate and guide pipe of the special gas-liquid two-phase mixing device described in this utility model;

[0017] Figure 3 This is a schematic diagram of the medium flow direction of the special gas-liquid two-phase mixing device described in this utility model;

[0018] Figure 4 This is a schematic diagram of the working state of the special gas-liquid two-phase mixing device described in this utility model. Figure 3 (Partial view from A);

[0019] In the diagram: 01, baffle plate; 02, guide tube; 03, tube wall; 11, main flow; 12, secondary flow; 13, eddy current. Detailed Implementation

[0020] The present invention can be explained in more detail through the following embodiments, but the present invention is not limited to the following embodiments;

[0021] First, it should be noted that the orientations or positional relationships indicated by terms such as "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer" used in describing the structure of this utility model are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing and simplifying this utility model, 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 this utility model.

[0022] Combined with appendix Figure 1 and attached Figure 2 The special gas-liquid two-phase mixing device includes a baffle plate 01 and a guide pipe 02. The baffle plate 01 is connected to the inner circular surface of the pipe wall 03 at the installation position. The guide pipe 02 passes through the pipe wall 03 and extends into the back of the baffle plate 01, forming the special gas-liquid two-phase mixing device.

[0023] The baffle plate 01 has a curved shape, which causes the mainstream fluid 11 flowing through the baffle plate 01 to form a vortex at its tail, thereby rapidly mixing with the secondary fluid 12 entering from the guide pipe 02.

[0024] The number of the baffles 01 is multiple, and they are distributed and connected to the inner circular surface of the pipe wall 03 at the installation position according to the usage.

[0025] The outlet of the guide pipe 02 faces the tail of the baffle plate 01, guiding the mainstream fluid 11 to the vortex formed at the tail of the baffle plate 01.

[0026] The number of flow guides 02 is the same as the number of baffles 01.

[0027] When the mixing device described in this utility model is in working condition, the attached Figure 3 A schematic diagram of the medium flow direction in a two-phase mixing device is attached. Figure 4 This represents a local streamline trajectory. When the main flow 11 passes through the baffle 01, its velocity increases due to the contraction of the flow channel area. Furthermore, the turbulence intensity of the main flow 11 increases due to the turbulence effect of the baffle 01. However, as the main flow 11 reaches the tail of the baffle 01, its velocity decreases, and its kinetic energy is converted into static pressure energy, forming a reverse pressure gradient. Under the influence of this reverse pressure gradient, the main flow 11 forms a vortex 13 on the back side of the tail of the baffle 01. Simultaneously, due to energy dissipation, the vortices 13 continuously appear and disappear, forming alternating vortices. At this point, the secondary flow 12 enters from the guide pipe 02 and rapidly mixes with the vortex-generating main flow 11, achieving a better mixing effect.

[0028] This utility model has the following advantages:

[0029] 1. This utility model adopts a special design concept, which guides the fluid by setting baffles and uses the kinetic energy of the fluid for mixing, resulting in a lower overall pressure drop and higher mixing efficiency.

[0030] 2. Existing mixer equipment often requires multiple continuous mixing units connected in series to achieve a good mixing effect. This invention, due to its unique design concept, achieves a good mixing effect simply by adding a few structural units to existing equipment, thereby significantly reducing equipment size and capital investment.

[0031] 3. Due to the simple overall structure of this utility model, the cutting effect on the fluid is small, and blockage is not likely to occur, which is conducive to the long-term stable operation of the device.

[0032] 4. This utility model has a small overall pressure drop, good mixing effect, long service life, and low cost, making it suitable for various industries that require mixing.

[0033] The parts of this utility model not described in detail are existing technologies.

[0034] The above embodiments illustrate one, but not all, implementations of this utility model. The scope of protection of this utility model is not limited to the following implementations; all equivalent changes or substitutions made based on the technical principles and spirit of this utility model are within its protection scope. The purpose of disclosing this utility model is to protect all technical improvements within it. All other implementations obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A special gas-liquid two-phase mixing device, comprising a baffle plate (01) and a guide pipe (02), characterized in that: The baffle plate (01) is connected to the inner circular surface of the pipe wall (03) at the installation position, and the guide pipe (02) passes through the pipe wall (03) and extends into the back of the baffle plate (01) to form the special gas-liquid two-phase mixing device.

2. The special gas-liquid two-phase mixing device according to claim 1, characterized in that: The baffle plate (01) is curved, which causes the main flow fluid (11) flowing through the baffle plate (01) to form a vortex at its tail, thereby rapidly mixing with the secondary flow fluid (12) entering from the guide pipe (02).

3. The special gas-liquid two-phase mixing device according to claim 1, characterized in that: The number of the baffles (01) is multiple, and they are distributed and connected to the inner circular surface of the pipe wall (03) at the installation location according to the usage.

4. The special gas-liquid two-phase mixing device according to claim 1, characterized in that: The outlet of the guide pipe (02) faces the tail of the baffle plate (01), guiding the mainstream fluid (11) to the vortex formed at the tail of the baffle plate (01).

5. The special gas-liquid two-phase mixing device according to claim 1, characterized in that: The number of the flow guide tubes (02) is the same as the number of the baffles (01).

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