Anti-backmixing self-circulation type energy-saving efficient cyclone separator

Abstract

The utility model discloses an anti-backmixing self-circulation type energy-saving high-efficiency cyclone separator, which comprises a cylinder section, an inverted cone section, an air inlet pipe, an exhaust pipe and a self-circulation backflow volute pipe, the large-caliber end of the inverted cone section is hermetically connected with the lower end of the cylinder section, the upper end of the cylinder section is provided with a top cover plate, the exhaust pipe is arranged on the top cover plate and extends downwards into the cylinder section, and the self-circulation backflow volute pipe is connected with the air inlet pipe. The air inlet pipe is of a volute structure and is horizontally and tangentially arranged in the middle of the cylinder section, the self-circulation backflow volute pipe is spirally arranged on the cylinder section, an upper end opening of the self-circulation backflow volute pipe is tangentially arranged at the upper end of the cylinder section, and a lower end opening of the self-circulation backflow volute pipe is tangentially arranged at the lower end of the cylinder section. According to the cyclone separator, the separation efficiency of micron and submicron particles is improved, a fan is not needed in a self-circulation mode, energy is saved, consumption is reduced, and the separation efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cyclone separators, and in particular relates to an anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator. Background Art

[0002] With the continuous development of modern industry, environmental protection is gaining increasing attention across various industries, and dust removal is a key environmental protection technology. Cyclone separators, which use centrifugal force to separate particles or liquid droplets, are widely used in various industries. When dust-laden gas enters through a tangential inlet, the airflow spirals within the cylinder. High-density particles, whether liquid droplets or dust particles, are thrown to the periphery. Upon contact with the cylinder wall, they lose inertia and fall down the cylinder under the influence of gravity, entering the discharge hopper below. The clean gas, free of impurities, forms a vortex and flows out through the air duct at the top outlet.

[0003] Traditional cyclone separators generally have three insurmountable problems: secondary flow near the air inlet, turbulent diffusion in the main separation zone, and back-mixing of particles at the bottom of the cone, which make it impossible to completely separate micron and submicron particles. Secondary flow will cause some particles to escape by short circuit. Due to the large kinetic energy loss of the low-speed gas near the wall, the subsequent rotation process enters the inner vortex too early and is discharged through the exhaust pipe, carrying some micron-sized particles with it to escape. The downward airflow near the wall will discharge the particles concentrated at the wall into the discharge bin. Part of the airflow enters the discharge bin and then returns to the separator. Part of the back-mixed airflow will always bring back some of the separated particles in the discharge bin, resulting in a decrease in separation efficiency. Therefore, it is necessary to overcome the shortcomings and deficiencies of traditional cyclone separators and provide a high-efficiency cyclone separator that prevents back-mixing and realizes self-circulation and reflux. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide an anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator.

[0005] The specific technical solutions are as follows:

[0006] An anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator comprises a cylindrical section, an inverted cone section, an air inlet pipe, an exhaust pipe and a self-circulating reflux volute pipe. The large-diameter end of the inverted cone section is sealed with the lower end of the cylindrical section. The upper end of the cylindrical section is provided with a top cover plate. The exhaust pipe is arranged on the top cover plate and extends downward into the cylindrical section. The air inlet pipe adopts a volute structure and is horizontally and tangentially arranged in the middle of the cylindrical section. The self-circulating reflux volute pipe is spirally arranged on the cylindrical section, and its upper end opening is tangentially arranged at the upper end of the cylindrical section. The lower end port of the self-circulating reflux volute pipe is tangentially arranged at the lower end of the cylindrical section.

[0007] Furthermore, the end portion of the exhaust pipe extending into the cylindrical section is provided with a mesh structure, and the size of the mesh depends on the characteristics of the dust-laden gas.

[0008] Furthermore, the length of the exhaust pipe extending into the cylindrical section is approximately 4 / 5 of the length of the cylindrical section, and the length of the mesh structure of the exhaust pipe is approximately 1 / 4 to 1 / 3 of the length of the exhaust pipe.

[0009] Furthermore, the ratio of the diameter of the air intake pipe to the diameter of the cylindrical section is no greater than 1 / 4.

[0010] Furthermore, the small-diameter end at the bottom of the inverted cone section is connected to a discharge bin, and a flow stabilizing cone is provided in the discharge bin.

[0011] The principle of the present invention is as follows: the tangentially arranged air intake pipe adopts a volute structure, and the gas forms a pre-rotational flow direction before entering the main shell of the cyclone separator, and is converted into a strong rotational motion after entering the main shell, thereby improving the separation efficiency. The air intake pipe is arranged in the middle of the cylindrical section of the main shell, which completely eliminates the adverse effect of low separation efficiency caused by the air intake pipe being arranged at the top of the cylindrical section of the main shell, thereby improving the separation efficiency of micron and submicron particles; it is arranged in the center of the top cover plate and extends downward into the cylindrical section of the main shell, and the bottom pipe wall area of ​​the inner extension section of the exhaust pipe is a mesh structure. Part of the purified rotating airflow in the main shell passes through the mesh in advance and enters the exhaust pipe, so that part of the rotating vortex shortens the path and reduces the pressure drop. A self-circulating return volute pipe is tangentially arranged at the top of the cylindrical section of the main shell. The gas carrying fine particles rotates and gathers at the top, then enters the self-circulating return volute pipe, rotates downward and separates along the wall flow direction, thereby improving the separation efficiency. The structure is compact, and the self-circulation mode does not require a fan, which saves energy and reduces consumption. The bottom of the inverted cone section of the main shell is connected to the inverted cone discharge bin through flanges and bolts, which is convenient for installation, disassembly and inspection. A stabilizing cone is set in the discharge bin, and a vortex is formed on the surface of the stabilizing cone to stabilize the flow field, reduce pressure loss, and prevent the rotating vortex from entering the discharge bin and entraining the separated particles to mix back, thereby improving the separation efficiency.

[0012] The beneficial effects of the present invention are:

[0013] The cyclone separator of the utility model improves the separation efficiency of micron and submicron particles. The self-circulation mode does not require a fan, which saves energy and reduces consumption. The steady flow cone in the discharge bin stabilizes the flow field, reduces pressure loss, and prevents rotating vortices from entering the discharge bin and entraining the separated particles for re-mixing, thereby further improving the separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a main schematic diagram of the utility model;

[0015] Figure 2 It is a top view schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the main view of the exhaust pipe.

[0017] In the figure: 1. Cylindrical section; 11. Top cover plate; 2. Inverted cone section; 3. Inlet pipe; 4. Exhaust pipe; 41. Mesh structure; 5. Self-circulating reflux volute pipe; 6. Discharge bin; 7. Flow stabilization cone. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings, but the protection scope of the present invention is not limited thereto.

[0019] like Figure 1 and Figure 2 As shown, an anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator comprises a cylindrical section 1, an inverted cone section 2, an air inlet pipe 3, an exhaust pipe 4, a self-circulating reflux volute pipe 5, a discharge bin 6 and a flow stabilizing cone 7. The large-diameter end of the inverted cone section 2 is sealed with the lower end of the cylindrical section 1, the upper end of the cylindrical section 1 is provided with a top cover plate 11, the bottom small-diameter end of the inverted cone section 2 is connected to the discharge bin 6, the discharge bin 6 is provided with a flow stabilizing cone 7, the exhaust pipe 4 is provided on the top cover plate 11 and extends downward into the cylindrical section 1, as shown in FIG. Figure 3 As shown, the end of the exhaust pipe 4 extending into the cylindrical section 1 is provided with a mesh structure 41, the size of the mesh depends on the characteristics of the dust-laden gas, the length of the exhaust pipe 4 extending into the cylindrical section 1 is approximately 4 / 5 of the length of the cylindrical section 1, and the length of the mesh structure 41 of the exhaust pipe 4 is approximately 1 / 4 to 1 / 3 of the length of the exhaust pipe 4, the air inlet pipe 3 adopts a volute structure and is horizontally and tangentially arranged in the middle of the cylindrical section 1, the ratio of the diameter of the air inlet pipe 3 to the diameter of the cylindrical section 1 is not greater than 1 / 4, the self-circulating return volute pipe 5 is spirally arranged on the cylindrical section 1, the upper end opening of the self-circulating return volute pipe 5 is tangentially arranged at the upper end of the cylindrical section 1, and the lower end port of the self-circulating return volute pipe 5 is tangentially arranged at the lower end of the cylindrical section 1.

[0020] During operation, the dust-laden gas enters the cylindrical section 1 through the air inlet pipe 3, and has a pre-rotating flow direction before entering the cylindrical section 1. After accelerating into the cylindrical section 1, it is transformed into a strong downward rotating motion. When the dust-laden gas enters the inverted cone section 2, it is further accelerated. Due to the action of centrifugal force, dust particles above the micron level are effectively separated and slide down the inner wall of the inverted cone section 2 into the discharge bin 6, completing the first-level dust removal. The dust-laden gas after preliminary purification turns upward at the lower part of the inverted cone section 2 to form an internal vortex. The purified gas at the center of the rotating airflow is discharged through the exhaust pipe 4, and the dust-laden gas undergoes secondary dust removal and separation. The dust-laden gas after effective separation in the secondary dust removal is carried by the air circulation to the self-circulating reflux volute pipe 5 and sent back to the cylindrical section 1 of the first-level dust removal for further separation and dust removal.

Claims

1. An anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator, characterized in that: The invention comprises a cylindrical section (1), an inverted cone section (2), an air intake pipe (3), an exhaust pipe (4) and a self-circulating reflux volute pipe (5), wherein the large-diameter end of the inverted cone section (2) is sealedly connected to the lower end of the cylindrical section (1), the upper end of the cylindrical section (1) is provided with a top cover plate (11), the exhaust pipe (4) is arranged on the top cover plate (11) and extends downward into the cylindrical section (1), the air intake pipe (3) adopts a volute structure and is horizontally tangentially arranged in the middle of the cylindrical section (1), the self-circulating reflux volute pipe (5) is spirally arranged on the cylindrical section (1), the upper end opening of the self-circulating reflux volute pipe (5) is tangentially arranged at the upper end of the cylindrical section (1), and the lower end port of the self-circulating reflux volute pipe (5) is tangentially arranged at the lower end of the cylindrical section (1).

2. The anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator according to claim 1, characterized in that: The end of the exhaust pipe (4) extending into the cylindrical section (1) is provided with a mesh structure (41).

3. The anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator according to claim 2, characterized in that: The length of the exhaust pipe (4) extending into the cylindrical section (1) is approximately 4 / 5 of the length of the cylindrical section (1), and the length of the mesh structure (41) of the exhaust pipe (4) is approximately 1 / 4 to 1 / 3 of the length of the exhaust pipe (4).

4. The anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator according to claim 3, characterized in that: The ratio of the diameter of the air intake pipe (3) to the diameter of the cylindrical section (1) is not greater than 1 / 4.

5. The anti-backmixing self-circulating energy-saving and high-efficiency cyclone separator according to claim 4, characterized in that: The small-diameter end at the bottom of the inverted cone section (2) is connected to a discharge bin (6), and a flow stabilizing cone (7) is provided in the discharge bin (6).

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