CN102698625A - High-pressure rotational flow mixing device - Google Patents

Abstract

The invention provides a high-pressure swirl mixing device, the main mixing chamber of which is composed of a cylindrical mixing chamber and a conical mixing chamber connected in series. The fluid inlet pipe is connected to the cylindrical mixing chamber. The fluid inlet pipe is designed with a nozzle with a pressure resistance greater than 10MPa. The solid phase feeding port is located above the cylindrical mixing chamber, and its axis is perpendicular to the nozzle axis. The exit of the conical mixing chamber is designed with a mixing chamber. Baffle, this baffle is composed of 2-6 blades distributed at an angle of 20°-60° between the outlet and the horizontal plane, the outlet of the conical mixing chamber is connected to the inlet of the steady flow elbow, and the elbow adopts a variable diameter structure, of which Elbow inlet diameter D ₁ /outlet diameter D ₂ =1.5-1.8, radius of curvature of the central axis of the elbow R/D ₁ =3.0-3.5. The inner wall of the mixing chamber is sprayed with wear-resistant materials mixed with solid particles, which can not only improve the wear resistance of the chamber, but also increase the unevenness of the sprayed surface and enhance the turbulent state in the mixing chamber to improve the mixing efficiency.

Description

A high-pressure swirl mixing device

Technical field:

The invention relates to a device for mixing solid phase and liquid phase or solid phase and gas phase, in particular to a device for mixing solids such as dust and particles with liquid or gas at construction sites in fields such as oil and gas fields and coal gas fields.

Background technique:

At present, the commonly used mixers in the industrial field mainly include pipeline mixers and static mixers. Pipeline mixers are generally composed of pipes, nozzles, vortex chambers, perforated plates or special-shaped plates, etc. The mixing methods are divided into three types: nozzle type, vortex type, perforated plate or special-shaped plate type; It is developed from plate and special-shaped plate mixers. The mixer has two kinds of fixed helical blades, left-handed and right-handed. When the fluid passes through the helical blades, the flow direction changes and turbulence occurs to achieve mixing. Pipeline mixers are too small in size and have low processing capacity; static mixers have very low fluid velocity in pipelines and poor mixing effects, so neither is suitable for mixing on construction sites in oil and gas fields, gas fields and other fields.

The mixing devices used in oil and gas fields and coal gas fields mainly use mechanical stirring, which is bulky and consumes a lot of energy, and cannot make full use of the energy of the fluid itself for mixing. Traditionally, cyclones are mainly used for solid-liquid or gas-liquid separation, and have been widely used in many technical fields such as mineral processing, metallurgy, petrochemical and environmental engineering. The structure of the traditional cyclone is basically connected by the cylindrical and conical sections of the inner cavity. There are no other parts in the cavity, and it completely depends on the vortex effect generated by the fluid entering the cavity during high-speed rotating motion. , to separate two media with different densities. But so far, the research on the mixing of solid and liquid or solid and gas in the cyclone has not been reported at home and abroad.

Invention content:

The technical problem to be solved by the present invention is to provide a high-pressure swirl mixing device, which can realize the mixing of solid and liquid or solid and gas under relatively high pressure conditions.

The technical solution adopted by the present invention to solve the technical problem is: on the basis of the design principle of the ordinary hydrocyclone, design according to the opposite design goal, that is, optimize the structural parameters of the hydrocyclone according to the goal of optimizing the mixing effect And process parameters, install nozzles, mixing baffles and steady flow elbows and other devices in the cavity to realize the mixing function of the cyclone under higher pressure. The main mixing chamber of the proposed high-pressure swirl mixing device is composed of a cylindrical mixing chamber and a conical mixing chamber in series. The fluid inlet pipe is connected to the cylindrical mixing chamber, and a nozzle is installed in the fluid inlet pipe, and the pressure resistance requirement of the nozzle is greater than 10MPa. A solid phase feeding port is installed above the cylindrical mixing chamber, and the axis of the solid phase feeding port is perpendicular to the axis of the nozzle. The outlet of the conical mixing chamber is designed with a mixing baffle, which is composed of 2-6 blades distributed at the outlet of the conical mixing chamber and the horizontal plane at an angle of 20°-60°. The inlet connection of the flow elbow, the steady flow elbow adopts a variable diameter structure, the inlet diameter of the steady flow elbow is D ₁ , the outlet diameter is D ₂ , D ₁ /D ₂ =1.5-1.8, the curvature of the central axis of the steady flow elbow The radius is R, R/D ₁ =3.0-3.5. The inner wall of the main mixing chamber is sprayed with wear-resistant materials mixed with solid particles to increase the unevenness of the sprayed surface, which can not only improve the wear resistance of the chamber, but also enhance the turbulent state in the mixing chamber to a certain extent, and improve the performance of the device. the mixing efficiency.

The beneficial effects of the present invention are: under the high pressure environment, the swirling effect of the fluid itself is fully utilized to realize the mixing of the fluid and the solid, because the size of the main mixing chamber is optimized, and nozzles, mixing baffles and steady flow elbows are added Such devices increase the turbulence area in the cyclone, so that the fluid flows radially in the cyclone to generate high linear velocity, large velocity gradient and strong turbulence, so that the solid and other High-pressure fluid realizes full and uniform mixing with high mixing efficiency.

Description of drawings:

Fig. 1 is the structural representation of the high-pressure swirl mixing device proposed by the present invention;

Fig. 2 is the top view of the high-pressure swirl mixing device proposed by the present invention;

Fig. 3 is the partial schematic view of the mixing baffle at the outlet of the conical mixing chamber of the high-pressure swirl mixing device proposed by the present invention;

Fig. 4 is a flow chart of the testing device of the present invention.

In the figure: 1. Fluid inlet pipe, 2. Nozzle, 3. Solid phase feeding port, 4. Cylindrical mixing chamber, 5. Conical mixing chamber, 6. Mixing baffle, 7. Steady flow elbow, 8. Fluid Storage tank, 9. Booster pump, 10. Pressure gauge, 11. Stop valve, 12. Feeding device, 13. Feed port valve, 14. High-pressure swirl mixing device, 15. Ball stop valve, 16. Flow meter, 17 . Metering device.

Detailed ways:

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Embodiment 1: As shown in Figures 1-3, the main mixing chamber of the high-pressure swirl mixing device is composed of a cylindrical mixing chamber 4 and a conical mixing chamber 5 connected in series. The fluid inlet pipe 1 is connected to the cylindrical mixing chamber 4, and the fluid inlet pipe 1 is provided with a nozzle 2 with a pressure greater than 10 MPa. A solid phase feeding port 3 is installed above the cylindrical mixing chamber 4, and the axis of the solid phase feeding port 3 is perpendicular to the axis of the nozzle 2. A mixing baffle 6 is designed at the outlet of the conical mixing chamber 5, and the mixing baffle 6 is composed of 2 blades distributed at an angle of 20° between the outlet of the conical mixing chamber and the horizontal plane. The outlet of the conical mixing chamber 5 is connected to the inlet of the steady flow elbow 7, the steady flow elbow 7 adopts a variable diameter structure, its inlet diameter is D ₁ , the outlet diameter is D ₂ , D ₁ /D ₂ =1.5, the steady flow The radius of curvature of the central axis of the elbow 7 is R, and R/D ₁ =3.0. In the test, the mixture particles flowing out of the steady flow elbow are evenly distributed, and the mixing efficiency of solid phase particles and fluid reaches 96%.

Embodiment 2: As shown in Figures 1-3, the main mixing chamber of the high-pressure swirl mixing device is composed of a cylindrical mixing chamber 4 and a conical mixing chamber 5 connected in series. The fluid inlet pipe 1 is connected to a cylindrical mixing chamber 4 . The fluid inlet pipe 1 is provided with a nozzle 2 with a pressure resistance greater than 10 MPa. A solid phase feeding port 3 is installed above the cylindrical mixing chamber 4, and the axis of the solid phase feeding port 3 is perpendicular to the axis of the nozzle 2. A mixing baffle 6 is designed at the outlet of the conical mixing chamber 5, and the mixing baffle 6 is composed of 4 blades distributed at an angle of 45° between the outlet of the conical mixing chamber and the horizontal plane. The outlet of the conical mixing chamber 5 is connected to the inlet of the steady flow elbow 7, the steady flow elbow 7 adopts a variable diameter structure, its inlet diameter is D ₁ , the outlet diameter is D ₂ , D ₁ /D ₂ =1.6, the steady flow The radius of curvature of the central axis of the elbow 7 is R, and R/D ₁ =3.3. In the test, the mixture particles flowing out of the steady flow elbow are evenly distributed, and the mixing efficiency of solid phase particles and fluid reaches 98%.

Embodiment 3: As shown in Figures 1-3, the main mixing chamber of the high-pressure swirl mixing device is composed of a cylindrical mixing chamber 4 and a conical mixing chamber 5 connected in series. The fluid inlet pipe 1 is connected to a cylindrical mixing chamber 4 . The fluid inlet pipe 1 is provided with a nozzle 2 with a pressure resistance greater than 10 MPa. A solid phase feeding port 3 is installed above the cylindrical mixing chamber 4, and the axis of the solid phase feeding port 3 is perpendicular to the axis of the nozzle 2. A mixing baffle 6 is designed at the outlet of the conical mixing chamber 5, and the mixing baffle 6 is composed of 6 blades distributed at an angle of 60° between the outlet of the conical mixing chamber and the horizontal plane. The outlet of the conical mixing chamber 5 is connected to the inlet of the steady flow elbow 7, the steady flow elbow 7 adopts a variable diameter structure, its inlet diameter is D ₁ , the outlet diameter is D ₂ , D ₁ /D ₂ =1.8, the steady flow The radius of curvature of the central axis of the elbow 7 is R, and R/D ₁ =3.5. In the test, the particles of the mixture flowing out of the steady flow elbow 7 are evenly distributed, and the mixing efficiency of the solid phase particles and the fluid reaches 97%.

As shown in FIG. 4 , the flow chart of the test device of the present invention is shown. The fluid storage tank 8 is connected to the booster pump 9 , and the outlet pipeline of the booster pump 9 is connected to the fluid inlet pipe 1 to be sealed. The feeding device 12 is connected with the solid phase feeding port 3 . The outlet of the steady flow elbow 7 is connected to the flow guide pipe and leads to the metering device 17 . After the connection between the device and the pipeline is completed, the test is carried out. First, open the booster pump 9 for pressure test operation until the flowmeter 16 has a reading and the metering device 17 has fluid flowing out. Then close all valves. After the pressure gauge 10 reaches a certain value, first Open the shut-off valve 11, then open the feeding port valve 13 and the spherical shut-off valve 15, read the readings of the flowmeter 16 and the metering device 17 to measure the number of solid particles, thereby judging the mixing effect. After the test, the pressure relief operation is required. Drain the fluid in the mixing chamber until there is no mixture in the mixing chamber.

The mixing device proposed by the present invention has the following salient features:

(1) Small footprint, less than 50% of the volume of ordinary mixing devices;

(2) The internal structure design is well matched and the mixing efficiency is high;

(3) The device has a simple structure and few parts, which is convenient for assembly and disassembly in actual production, and has strong mobility.

Starting from the basic theory of hydrocyclones, this study adopts reverse thinking to design hydrocyclones that can realize solid-liquid or solid-gas mixing functions at relatively high pressures, and manufacture test models for experimental verification and analysis. The production efficiency of liquid or solid gas mixing system is of great significance.

The device has a simple structure and is convenient for processing. Compared with the existing mixing device, it has the characteristics of small volume and strong mixing ability.

Claims (5)

1. high pressure cyclone mixing arrangement, the main body hybrid chamber is formed by cylindrical hybrid chamber and conical hybrid chamber tandem compound, it is characterized in that: the fluid intake pipe is connected with cylindrical hybrid chamber; Be provided with nozzle in the fluid intake pipe; The solid phase charge door is installed in the top of cylindrical hybrid chamber, the axis of solid phase charge door and the axis normal of nozzle, and the exit of conical hybrid chamber is designed with mixing baffle; This mixing baffle is distributed in conical hybrid chamber by the 2-6 sheet outlet becomes the blade at 20 ° of-60 ° of angles to form with horizontal plane; The outlet of conical hybrid chamber is connected with the inlet of current stabilization bend pipe, and the current stabilization bend pipe adopts variable-diameter structure, the inlet diameter D of current stabilization bend pipe ₁/ outlet diameter D ₂=1.5-1.8, the inlet diameter D of current stabilization bend pipe central axis radius of curvature R/current stabilization bend pipe ₁=3.0-3.5.

2. high pressure cyclone mixing arrangement according to claim 1 is characterized in that described mixing baffle is distributed in conical hybrid chamber outlet by 2 and becomes the blade at 20 ° of angles to form with horizontal plane; Current stabilization bend pipe inlet diameter D ₁/ outlet diameter D ₂=1.5, current stabilization bend pipe central axis radius of curvature R/current stabilization bend pipe inlet diameter D ₁=3.0.

3. high pressure cyclone mixing arrangement according to claim 1 is characterized in that described mixing baffle is distributed in conical hybrid chamber outlet by 4 and becomes the blade of 45 to form with horizontal plane; Current stabilization bend pipe inlet diameter D ₁/ outlet diameter D ₂=1.6, current stabilization bend pipe central axis radius of curvature R/current stabilization bend pipe inlet diameter D ₁=3.3.

4. high pressure cyclone mixing arrangement according to claim 1 is characterized in that described mixing baffle is distributed in conical hybrid chamber outlet by 6 and becomes the blade at 60 ° of angles to form with horizontal plane; Current stabilization bend pipe inlet diameter D ₁/ outlet diameter D ₂=1.8, current stabilization bend pipe central axis radius of curvature R/current stabilization bend pipe inlet diameter D ₁=3.5.

5. high pressure cyclone mixing arrangement according to claim 1 is characterized in that described nozzle is withstand voltage greater than 10MPa.

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