CN-121975994-A - Smoke dust separation device and method based on vortex street turbulence and baffle inertial collision

Abstract

The invention discloses a smoke dust separating device based on combination of vortex street turbulence and baffle inertial collision, which comprises a main flow elbow, wherein a vortex street generating cylinder is arranged in the main flow elbow, an ash bucket is arranged at the bottom of the main flow elbow, a flow guide baffle is arranged in the main flow elbow and the ash bucket in a penetrating way, and an ash unloading bin is arranged at the lower part of the ash bucket. The invention also discloses a smoke dust separation method based on the combination of vortex street turbulence and baffle inertial collision, which solves the problem of low dust removal efficiency of the existing dust removal device.

Inventors

• HUANG YANQIU
• ZHAO ZIFAN
• WANG HUI
• ZHAO YIHANG
• ZHU XIAOHUA
• DU QI
• DONG YUAN
• GUO JUNWEI
• WEI FANGFANG

Assignees

• 西安建筑科技大学
• 中冶建筑研究总院有限公司

Dates

Publication Date

20260505

Application Date

20260316

Claims (8)

1. 1. The smoke dust separating device based on vortex street turbulence and baffle inertia collision combination is characterized by comprising a main flow elbow (1), wherein a vortex street generating cylinder (2) is arranged in the main flow elbow (1), an ash bucket (4) is arranged at the bottom of the main flow elbow (1), a flow guide baffle (3) is arranged in the main flow elbow (1) and the ash bucket (4) in a penetrating way, and an ash unloading bin (6) is arranged at the lower part of the ash bucket (4).
2. 2. The smoke dust separating device based on combination of vortex street turbulence and baffle inertial collision according to claim 1, wherein the ash bucket (4) is of an inverted cone-shaped platform structure.
3. 3. The smoke and dust separation device based on vortex street turbulence and baffle inertial collision combination according to claim 2, wherein the inner side wall of the ash bucket (4) is a dust collecting wall (7), and the dust collecting wall (7) is a heat-insulating fireproof lining.
4. 4. The smoke and dust separation device based on vortex street turbulence and baffle inertia collision combination according to claim 3, wherein the surface of the vortex street generating cylinder (2) is provided with triangular ribs (8).
5. 5. The smoke and dust separation device based on vortex street turbulence and baffle inertia collision combination according to claim 4, wherein the triangular ribs (8) are distributed on the surface of each vortex street generating cylinder (2) in a spiral type at equal intervals.
6. 6. The smoke and dust separation device based on vortex street turbulence and baffle inertia collision combination according to claim 4, wherein a plurality of layers of baffles (5) with the same size are arranged on one side of the flow guide baffle (3), and the layers of baffles (5) are positioned in the ash bucket (4).
7. 7. The smoke and dust separation device based on vortex street turbulence and baffle inertia collision combination according to claim 6, wherein the lower tail part of each multi-layer baffle (5) is provided with an arc-shaped lower bend (9).
8. 8. A smoke dust separation method based on vortex street turbulence and baffle inertia collision combination is characterized by comprising the following steps that dust-containing smoke enters from a main flow elbow pipe (1), boundary layer separation is carried out through a cylindrical vortex generator (2) in the main flow elbow pipe (1) firstly, dust-containing smoke collides with a flow guide baffle (3) and the inner wall surface of the main flow elbow pipe (1) respectively, the flow guide baffle (3) guides the dust-containing smoke to flow to the direction of a dust discharging bin (6), the dust-containing smoke flows to one side of the flow guide baffle (3) and collides with a plurality of layers of baffles (5), and smoke dust particles which are not separated from the smoke dust after passing through the front cylindrical vortex generator (2) are separated under the action of inertia collision.

Description

Smoke dust separation device and method based on vortex street turbulence and baffle inertial collision Technical Field The invention belongs to the technical field of primary coarse effect smoke dust trapping of converters, relates to a smoke dust separation device based on vortex street turbulence and baffle inertial collision, and further relates to a smoke dust separation method based on vortex street turbulence and baffle inertial collision. Background The converter steelmaking is an important steelmaking method, is a main steelmaking mode in China, and the yield of the converter steel accounts for more than 90% of the total yield of the steel in China. The existing converter flue gas waste heat recovery system has the problems of easy increase of resistance and high maintenance cost, mainly because the converter flue gas contains a large amount of large-particle-size smoke dust, the inside of the primary smoke dust separator is easy to accumulate dust and abrade, thereby increasing the system resistance, and the device is easy to abrade and has high maintenance cost, so that the device needs to be optimized for resistance reduction, synergy and abrasion resistance. The particle size distribution of primary smoke dust of the current steelmaking converter is 10-200 mu m, wherein the median particle size is about 50 mu m, the smoke dust particles are larger in general, and a cyclone dust collector and an inertial dust collector which are commonly used for a coarse dust collector of the converter have certain limitations. The cyclone dust collector is suitable for coarse dust particles with the diameter of more than 10 mu m, has high dust collection efficiency, can not form a plunger flow, is easy to form a detention area of explosion smoke, forms explosion hidden danger, has larger system resistance, has larger equipment resistance loss of 1000 Pa-1500 Pa, has high energy consumption and poor economic benefit, and the inertial dust collector is suitable for coarse dust particles with the diameter of more than 20-30 mu m, has simple structure and small system resistance, but has lower dust collection efficiency compared with the cyclone dust collector. The coarse-effect smoke dust separator of the existing converter dry dust removal system usually adopts a separator based on an inertial separation principle, has the characteristics of low resistance and convenient maintenance, but has relatively low smoke dust separation efficiency, so that the smoke dust separation device based on the combination of vortex street turbulence and baffle inertial collision is provided, and the device can improve the smoke dust separation efficiency on the premise of ensuring the low resistance of the system, thereby promoting the overall low-carbon energy conservation of the converter dry dust removal system. Disclosure of Invention The invention aims to provide a smoke dust separating device based on combination of vortex street turbulence and baffle inertial collision, which solves the problem of low dust removal efficiency of the existing dust removing device. It is another object of the present invention to provide a smoke separation method based on vortex street turbulence and baffle inertial collision. The first technical scheme adopted by the invention is that the smoke dust separating device based on the combination of vortex street turbulence and baffle inertial collision comprises a main flow elbow, wherein a vortex street generating cylinder is arranged in the main flow elbow, an ash bucket is arranged at the bottom of the main flow elbow, a flow guide baffle is arranged in the main flow elbow and the ash bucket in a penetrating way, and an ash unloading bin is arranged at the lower part of the ash bucket. The first technical scheme of the invention is characterized in that: The ash bucket is of an inverted cone table structure. The inner side wall of the ash bucket is a dust collecting wall which is a heat-insulating refractory lining. Triangular ribs are arranged on the surface of the vortex street generating cylinder. The triangular ribs are spirally and equidistantly distributed on the surface of each vortex street generating cylinder. One side of the flow guide baffle is provided with a plurality of multi-layer baffles with the same size, and the multi-layer baffles are positioned inside the ash bucket. The tail part of the lower side of each multi-layer baffle is provided with an arc-shaped lower bend. The second technical scheme adopted by the invention is that the dust separation method based on the combination of vortex street turbulence and baffle inertia collision specifically comprises the following steps that dust-containing flue gas enters from a main flow elbow, firstly passes through a cylindrical vortex generator in the main flow elbow to generate boundary layer separation, so that the dust-containing flue gas collides with a flow guide baffle and the inner wall surface of the main flow elbow res