Inner-outer double-layer efficient low-resistance cyclone separation device

Abstract

The utility model discloses an inner-outer double-layer high-efficiency low-resistance cyclone separation device, which belongs to the technical field of gas-solid separation and comprises an outer cylinder and an inner cylinder. The outer barrel comprises a volute section, an outer straight barrel section, an outer conical section and a slant conical section which are sequentially connected from top to bottom, one side of the volute section is connected with a main inlet pipeline, a vortex channel is formed in the volute section, and the main inlet pipeline is communicated with the interior of the vortex channel; the inner barrel is arranged inside the outer barrel and comprises an inner straight barrel section and a conical bin which are sequentially connected from top to bottom; wherein the top of the inner straight cylinder section is arranged at the top of the outer cylinder in a penetrating mode, an inner feeding port for dust particles to enter is further formed in the side portion of the inner straight cylinder section, and the inner feeding port is communicated with the interior of the tail end of the vortex channel and is formed close to the upper portion of the conical bin; by means of the design, a secondary flow field of an internal flow field of the cyclone separator can be weakened, the loss of on-way resistance is reduced, the separation efficiency of the cyclone separator is improved, and meanwhile the pressure loss of the cyclone separator is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of gas-solid separation technology, and in particular relates to a double-layer high-efficiency low-resistance cyclone separator. Background Technology

[0002] Cyclone separators are widely used in chemical, cement, environmental protection, and power generation industries, and are key equipment for achieving gas-solid separation. Their main function is to remove as many solid particles and droplets as possible from the transported gas, achieving gas-solid-liquid separation to ensure the normal operation of pipelines and equipment.

[0003] Based on current research, the internal flow field of a cyclone separator consists of a main flow field and a "secondary flow" field. The main flow field includes an external "quasi-free vortex" and a central "quasi-forced vortex," while the secondary flow field includes short-circuit flow, upper circulation, lower circulation, and eccentric flow. Gas-solid separation mainly occurs in the main flow field, while the secondary flow, due to short-circuit flow of dust particles, secondary dust re-entrainment, and secondary entrainment, affects the separation efficiency of the cyclone separator. The pressure drop of the cyclone separator is mainly composed of frictional resistance and local resistance. Local resistance is mainly caused by the local contraction or expansion of the inlet and outlet, while frictional resistance is mainly caused by friction between the airflow and the separator wall, the central forced vortex, and the dissipation of kinetic energy at the outlet.

[0004] However, conventional cyclone separators consist of an inlet, volute, inner cylinder, straight section, cone, and discharge port. These structures have some shortcomings, such as the separation efficiency and pressure drop of the cyclone separator being stable but not improved.

[0005] To address the shortcomings of existing technologies, this invention provides a double-layered, high-efficiency, low-resistance cyclone separator, aiming to solve the aforementioned problems. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a double-layer high-efficiency low-resistance cyclone separator. By changing the structural form of the conventional cyclone separator, it can weaken the "secondary flow" flow field inside the cyclone separator and reduce the loss of frictional resistance, thereby improving the separation efficiency of the cyclone separator and reducing its pressure loss.

[0007] To achieve the above objectives, this utility model employs the following technical solution:

[0008] A double-layer high-efficiency, low-resistance cyclone separator includes:

[0009] The outer cylinder includes a volute section, an outer straight cylinder section, an outer conical section and a skewed conical section connected sequentially from top to bottom. A main inlet pipe is connected to one side of the volute section, and a vortex channel is provided inside the volute section. The main inlet pipe is connected to the end of the vortex channel.

[0010] And an inner cylinder, which is located inside the outer cylinder, comprising an inner straight cylinder section and a conical compartment connected sequentially from top to bottom; wherein,

[0011] The top of the inner straight cylinder section passes through the top of the outer cylinder, and the side of the inner straight cylinder section is also provided with an inner feed port for dust particles to enter. The inner feed port is connected to the inside of the vortex channel and is located near the top of the conical hopper.

[0012] Preferably, the inner cylinder further includes a discharge chute, which is connected to the bottom of the conical hopper and has internal communication with it.

[0013] Preferably, the top of the inner straight cylinder section is connected to the outside, and the top opening of the inner straight cylinder section is an exhaust port.

[0014] Preferably, the bottom opening of the conical section is a discharge port.

[0015] Preferably, the ratio of the diameter of the inner straight cylinder section to the diameter of the outer straight cylinder section is between 0.3 and 0.8.

[0016] Preferably, the ratio of the height of the outer cylinder to the height of the volute section is between 1.05 and 1.8.

[0017] Preferably, the ratio of the height of the inner feed inlet to the height of the volute section is between 0.3 and 0.95.

[0018] Preferably, the ratio of the height of the conical hopper to the height of the inner feed inlet is between 0.2 and 0.6.

[0019] Preferably, the ratio of the height of the conical segment to the height of the volute segment is between 0.3 and 1.2.

[0020] Preferably, the ratio of the diameter of the feed chute to the diameter of the inner straight section is between 0.1 and 0.3.

[0021] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0022] 1. This utility model designs an outer cylinder and an inner cylinder structure. First, by setting up a vortex channel and a main inlet pipe, gas is introduced and initially accelerated, laying the foundation for subsequent gas-solid separation. By setting a conical chamber at the bottom of the inner straight cylinder section, the outlet pressure field and flow field are guided to be reasonably distributed, which reduces pressure loss and guides the flow, reducing secondary dust and secondary entrainment of dust particles collected and entering the skewed cone section. At the same time, by setting a discharge chute at the outlet of the conical chamber, the dust particles collected in the inner cylinder can be quickly guided to the inner side of the outer cylinder, achieving a good secondary separation and dust removal effect.

[0023] 2. This utility model helps to improve separation efficiency and reduce pressure drop by designing the diameter ratio of the inner straight cylinder section to the outer straight cylinder section, the height ratio of the outer cylinder to the volute section, the height ratio of the inner air inlet to the volute section, the height ratio of the conical chamber to the inner air inlet, and the height ratio of the skewed conical section to the volute section. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a cross-sectional view of the present invention from a certain angle.

[0026] Figure 3 This is a cross-sectional view of the present invention from a certain angle.

[0027] Figure 4 This is a schematic diagram of the inner cylinder of this utility model.

[0028] in:

[0029] 1. Outer cylinder; 11. Volute section; 12. Outer straight cylinder section; 13. Outer conical section; 14. Inclined conical section; 15. Main inlet pipe; 2. Inner cylinder; 21. Inner straight cylinder section; 211. Inner feed port; 22. Conical hopper; 23. Discharge chute; 24. Exhaust port; 3. Discharge port. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0031] In the description of this utility model, it should be understood that the terms "middle," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this 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, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] refer to Figures 1-4 This embodiment provides a double-layer high-efficiency low-resistance cyclone separator, including: an outer cylinder 1 and an inner cylinder 2;

[0034] Specifically, the outer cylinder 1 includes a volute section 11, an outer straight cylinder section 12, an outer conical section 13 and a skewed conical section 14 connected sequentially from top to bottom. A main inlet pipe 15 is connected to one side of the volute section 11. A vortex channel is provided inside the volute section 11, and the main inlet pipe 15 is connected to the inside of the vortex channel.

[0035] It should be noted that the vortex channel can be referenced. Figure 2 The arc position inside the outer cylinder 1 represents the movement direction of the dust particles in the vortex channel.

[0036] It should be noted that, in order to increase the local swirling air velocity and further improve the separation efficiency of the device, in this embodiment, a flow guide isolation plate is provided at the end of the air inlet of the volute section 11, and a flow guide plate with a small curvature can be set here.

[0037] Furthermore, the top of the inner straight section 21 is connected to the outside, and the top opening of the inner straight section 21 is an exhaust port 24.

[0038] Furthermore, the bottom opening of the conical section 14 is a discharge port 3.

[0039] Specifically, the inner cylinder 2 is placed inside the outer cylinder 1, and includes an inner straight cylinder section 21 and a conical chamber 22 connected sequentially from top to bottom; wherein, the top of the inner straight cylinder section 21 passes through the top of the outer cylinder 1, and the side of the inner straight cylinder section 21 is also provided with an inner feed port 211 for dust particles to enter, the inner feed port 211 is connected to the end of the vortex channel and is opened near the top of the conical chamber 22.

[0040] Based on the above, the inner feed inlet 211 is designed on the side of the inner cylinder 2, which fundamentally eliminates the existence of short-circuit flow and reduces the occurrence of "secondary dust" and "secondary entrainment". At the same time, the inner feed inlet 211 is set on the side of the inner cylinder 2, which reduces the friction resistance of the cyclone separator and weakens the formation of the central forced vortex.

[0041] Furthermore, in order to facilitate the smooth discharge of solid particles and reduce blockage and secondary dust, in this embodiment, the inner cylinder 2 also includes a discharge chute 23, which is connected to the bottom of the conical hopper 22 and internally communicates with it. This design can directly send the secondary collected dust particles to the discharge port 3 of the device, thereby improving the separation efficiency of the device.

[0042] In order to improve separation efficiency and reduce pressure drop, in this embodiment:

[0043] The ratio of the diameter of the inner straight section 21 to the diameter of the outer straight section 12 is between 0.3 and 0.8.

[0044] The ratio of the height of the outer cylinder 1 to the height of the volute section 11 is between 1.05 and 1.8.

[0045] The ratio of the height of the inner feed inlet 211 to the height of the volute section 11 is between 0.3 and 0.95.

[0046] The ratio of the height of the conical hopper 22 to the height of the inner feed inlet 211 is between 0.2 and 0.6.

[0047] The ratio of the height of the conical segment 14 to the height of the volute segment 11 is between 0.3 and 1.2.

[0048] The ratio of the diameter of the discharge chute 23 to the diameter of the inner straight section 21 is between 0.1 and 0.3.

[0049] The ratio of the side length of the exhaust port 24 of the inner straight section 21 to the perimeter of the inner straight section 21 is between 0.2 and 0.8.

[0050] Working principle: During operation, the airflow containing powder enters the cyclone separator through the main inlet pipe 15. Influenced by the vortex channel connected to the main inlet pipe 15, the airflow is forced to enter the cyclone separator in a tangential motion, generating swirling motion. Then, the first and second gas-solid separations occur: (Details are as follows:)

[0051] First gas-solid separation: The particles are subjected to a large centrifugal force and are thrown towards the inner wall of the outer cylinder 1, losing kinetic energy and being collected. They flow along the airflow direction of the inner wall of the outer cylinder 1 and enter the discharge port 3 of the skewed cone section 14 before being discharged.

[0052] Second gas-solid separation: The gas flow enters the conical chamber 22 through the inner feed port 211 of the inner straight section 21. The radius of rotation decreases and the centripetal force increases. Then the gas moves upward through the side of the inner straight section 21 and is discharged from the exhaust port 24.

[0053] In summary, this utility model, through the combination of the above-mentioned structures and the optimization of structural size ratios, works together to improve the separation efficiency of the cyclone separator and reduce pressure drop, while reducing secondary dust and short-circuit flow, thereby improving the overall gas-solid separation effect. Compared with conventional cyclone separators, this design can improve the separation efficiency by about 10-15% and reduce the pressure loss of the cyclone separator by about 30-60%.

[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A double-layer high-efficiency, low-resistance cyclone separator, characterized in that, include: The outer cylinder (1) includes a volute section (11), an outer straight cylinder section (12), an outer conical section (13) and a skewed conical section (14) connected sequentially from top to bottom. A main inlet pipe (15) is connected to one side of the volute section (11). A vortex channel is provided inside the volute section (11), and the main inlet pipe (15) is connected to the inside of the vortex channel. And an inner cylinder (2), which is placed inside the outer cylinder (1), and includes an inner straight cylinder section (21) and a conical chamber (22) connected sequentially from top to bottom; wherein, The top of the inner straight section (21) passes through the top of the outer cylinder (1), and the inner straight section (21) is also provided with an inner feed port (211) for dust particles to enter; the inner feed port (211) is connected to the inside of the end of the vortex channel and is opened near the top of the conical chamber (22).

2. The double-layer high-efficiency low-resistance cyclone separator according to claim 1, characterized in that, The inner cylinder (2) also includes a discharge chute (23), which is connected to the bottom of the conical hopper (22) and has internal communication with it.

3. The double-layer high-efficiency low-resistance cyclone separator according to claim 1, characterized in that, The top of the inner straight section (21) is connected to the outside, and the top opening of the inner straight section (21) is an exhaust port (24).

4. The double-layer high-efficiency low-resistance cyclone separator according to claim 1, characterized in that, The bottom opening of the conical section (14) is the discharge port (3).

5. The double-layer high-efficiency low-resistance cyclone separator according to claim 1, characterized in that, The ratio of the diameter of the inner straight section (21) to the diameter of the outer straight section (12) is between 0.3 and 0.

8.

6. The double-layer high-efficiency low-resistance cyclone separator according to claim 1, characterized in that, The ratio of the height of the outer cylinder (1) to the height of the volute section (11) is between 1.05 and 1.

8.

7. The double-layer high-efficiency low-resistance cyclone separator according to claim 1, characterized in that, The ratio of the height of the inner feed inlet (211) to the height of the volute section (11) is between 0.3 and 0.

95.

8. The double-layer high-efficiency low-resistance cyclone separator according to claim 1, characterized in that, The ratio of the height of the conical hopper (22) to the height of the inner feed inlet (211) is between 0.2 and 0.

6.

9. The double-layer high-efficiency low-resistance cyclone separator according to claim 1, characterized in that, The ratio of the height of the conical segment (14) to the height of the volute segment (11) is between 0.3 and 1.

2.

10. The double-layer high-efficiency low-resistance cyclone separator according to claim 2, characterized in that, The ratio of the diameter of the discharge chute (23) to the diameter of the inner straight section (21) is between 0.1 and 0.3.

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