A multi-stage atomizing dust removal device

Abstract

The present invention discloses a multi-stage atomizing dust removal device, which includes a dust removal main body. The dust removal main body is divided into an inlet section, a contraction section, an annular spray head and a diffusion section from bottom to top, and the four are fixed as a whole. The contraction section is a conical structure, and the diffusion section is an inverted conical structure. The two are connected by an annular spray head. Above the diffusion section, a spray pipe and an exhaust pipe are successively arranged. An atomizing spray head is arranged in the spray pipe, and an axial flow fan is arranged between the spray pipe and the exhaust pipe. The structure of the present invention is simple, the operation is convenient, the manufacturing cost is low, while improving the work efficiency, the solution preparation concentration can be ensured; the dust removal effect is good, which can not only effectively prevent dust from floating in the air and causing secondary pollution, but also ensure the safety of operators and the long-term stable operation of workshop equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment, and particularly relates to a multi-stage atomizing dust removal device. Background Art

[0002] In the water treatment process, it is usually necessary to prepare solutions of activated carbon powder, activated coke particles, PAC, PAM, etc., and then add the solutions to the water treatment process system through a water pump. Since activated carbon powder, activated coke particles, PAC, and PAM are powdery solid agents, a large amount of dust will float in the air during the solution preparation process, which is easily inhaled by the human body or enters the equipment, causing irreversible damage to the human body and the equipment, resulting in a decrease in the treatment efficiency of the water treatment equipment, a significant increase in labor and equipment costs, and the need to collect and treat the dust.

[0003] Currently, the commonly used treatment method in the water treatment industry is that operators wear dust masks to operate, try to shorten the working time in the workshop, and at the same time, extract the dust outdoors through the exhaust fans in the workshop for dilution. However, such a treatment method still cannot ensure the safety of the dust for the operators and the equipment, has low work efficiency, and cannot ensure the required solution concentration; and the dust cannot be completely removed, and discharging it outdoors will cause secondary pollution. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-stage atomizing dust removal device that can collect and treat the dust generated during the preparation of solutions of powdery solid agents.

[0005] To this end, the technical solution of the present invention is: a multi-stage atomizing dust removal device, characterized in that it includes a dust removal main body, which is divided into an inlet section, a contraction section, an annular nozzle, and a diffusion section from bottom to top, and the four are fixed as a whole; the contraction section is a conical structure, the diffusion section is an inverted conical structure, and the two are connected by the annular nozzle; a spray pipe and an exhaust pipe are sequentially arranged above the diffusion section, an atomizing nozzle is arranged in the spray pipe, and an axial flow fan is arranged between the spray pipe and the exhaust pipe.

[0006] Preferably, both the atomizing nozzle and the annular nozzle are externally connected to a water inlet pipe, the water inlet pipe is divided into two paths, respectively connected to the atomizing nozzle and the annular nozzle, and a regulating valve and a flow meter are arranged on the water inlet pipe.

[0007] Preferably, the annular nozzle is a hollow annular structure, and a plurality of spray holes are uniformly arranged on the inner side.

[0008] Preferably, the large-diameter end of the contraction section is connected to the inlet section, the small-diameter end of the contraction section is connected to the small-diameter end of the diffusion section through the annular nozzle, an installation bracket is arranged in the diffusion section, and a filter filler is arranged on the installation bracket.

[0009] Preferably, the filtering filler is Pall ring packing or hollow balls.

[0010] The present invention is arranged on a semi-open solution tank. The axial flow fan can create a negative pressure in the solution tank, forcing the dust-containing gas to enter the inlet section. The contraction section is a conical structure, so that the upward velocity of the gas continuously increases as the cross-sectional area of the flow passage decreases. When entering the annular nozzle, the gas velocity reaches the maximum value. The annular nozzle can eject high-pressure fine water jets, which collide with the gas and aggregate into larger ash water droplets that fall back into the solution tank, removing most of the large particle dust. The diffusion section is an inverted conical structure, and the upward velocity of the gas continuously decreases as the cross-sectional area of the flow passage increases, and the pressure rises, enabling the gas to fully contact the filtering filler in the diffusion section, and part of the dust adheres to the filtering filler. The atomizing nozzle sprays water mist, which can block the dust by the gas film around the water mist and adhere to form water droplets that fall back into the filtering filler, forming a secondary interception. The water mist ejected by the atomizing nozzle can ensure that the filtering filler is moist, and at the same time plays a role in continuously backwashing and cleaning the filtering filler.

[0011] The structure of the present invention is simple, easy to operate, and has a low manufacturing cost. While improving the work efficiency, it can also ensure the concentration of the solution preparation; it has good dust removal effect, can effectively prevent dust from floating in the air and causing secondary pollution, and ensures the safety of the operators and the long-term stable operation of the workshop equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following further describes the present invention in detail in conjunction with the accompanying drawings and the embodiments of the present invention.

[0013] Figure 1 is a schematic structural diagram of the present invention;

[0014] Figure 2 is a schematic internal structure diagram of the present invention;

[0015] Figure 3 is a structural cross-sectional view of the present invention;

[0016] Figure 4 is a schematic structural diagram of the annular nozzle of the present invention;

[0017] Figure 5 、 Figure 6 is an application schematic diagram of the present invention.

[0018] The marks in the figure are: inlet section 1, contraction section 2, annular nozzle 3, spray holes 31, water inlet interface 32, diffusion section 4, mounting bracket 41, spray pipe 5, axial flow fan 6, exhaust pipe 7, regulating valve 8, flowmeter 9, atomizing nozzle 10, filtering filler 11, dust exhaust port 12, solution tank 13, dust collection bag 14, water inlet pipe 15, activated coke filter material tank 16. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] See the attached drawings. The dust removal device described in this embodiment is composed of an inlet section 1, a contraction section 2, an annular nozzle 3, a diffusion section 4, a spray pipe 5, an axial flow fan 6, and an exhaust pipe 7. The inlet section 1 is a cylindrical section welded flange, which is connected to the dust exhaust port 12; the contraction section 2 is a tapered tube, the large-diameter end is welded to the inlet section 1 to form a whole, the small-diameter end of the contraction section 2 is connected to the annular nozzle 3, which is composed of a straight tube processed into a ring shape, and a plurality of spray holes 31 are evenly arranged on the inner wall to form a closed annular nozzle, which is welded to the small-diameter end of the contraction section. The outer wall of the annular nozzle 3 is provided with a water inlet interface 32 for connecting the water inlet pipe 15.

[0020] The diffuser section 4 is an inverted conical tube, and the small-diameter end of the diffuser section is welded to the annular nozzle 3 as a whole. A mounting bracket 41 is provided inside the diffuser section 4, and a filter filler 11 is provided on the mounting bracket 41. The filter filler 11 is a ball ring filler or a hollow ball. The large-diameter end of the diffuser section 4 is provided with a spray pipe 5 through a flange, and an atomizing nozzle 10 is provided inside the spray pipe 5. The atomizing nozzle 10 is connected to the water inlet pipe outside the spray pipe 5; the water inlet pipe 15 is divided into two branches, one branch is connected to the annular nozzle 3, and the other branch is connected to the atomizing nozzle 10. The two branches and the main water inlet pipe are provided with regulating valves 8, and the main water inlet pipe is also provided with a flow meter 9. The axial flow fan 6 is installed above the spray pipe 5 by bolt connection, and then the exhaust pipe 7 is fixed above the axial flow fan 6 by bolt connection.

[0021] During operation, the dust removal device is installed on the dust exhaust port 12 of the semi-open solution pool 13 or the activated coke filter pool 16, and the inlet section 1 is connected to the dust exhaust port 12; when the solid agent with powder is continuously added, a large amount of dust is generated in the pool; at this time, the axial flow fan is turned on, and the axial flow fan is used to draw air to generate negative pressure in the solution pool, forcing the gas and dust to enter the inlet section 1 from the dust exhaust port 12. When the dust-containing gas enters the contraction section 2, the rising speed of the gas continues to increase due to the decrease in the flow cross-sectional area. When entering the annular nozzle 3, the flow rate of the gas reaches the maximum value, collides with the high-pressure fine water column sprayed by the annular nozzle 3, and the gray water droplets aggregated into larger particles fall back into the solution pool, removing most of the large particles of dust. The gas continues to rise and enters the diffusion section 4. The rising speed of the gas at this time continues to decrease as the flow cross-sectional area increases, the pressure rises, the gas is fully in contact with the filter filler 11, and some dust adheres to the filter filler 11. The gas continues to rise and enters the spray pipe 5, and the atomizing nozzle 10 sprays water mist. The dust remaining in the gas is blocked by the air film around the water mist, and adheres to water droplets and falls back into the filter filler, forming a secondary interception. Finally, the axial flow fan 6 discharges the clean gas into the air to complete the dust removal work.

Claims

1. A multi-stage atomizing dust removal device, characterized in that: The dust removal device is installed on the dust exhaust port of a semi-open solution tank or an activated coke filter material tank. The dust removal device includes a dust removal main body, which is divided into an inlet section, a contraction section, an annular spray head, and a diffusion section from bottom to top, and the four are fixed as a whole; the contraction section is a conical structure, and the diffusion section is an inverted conical structure, and the two are connected by an annular spray head; the large-diameter end of the contraction section is connected to the inlet section, and the small-diameter end of the contraction section is connected to the small-diameter end of the diffusion section through the annular spray head. An installation bracket is provided in the diffusion section, and a filter filler is provided on the installation bracket; a spray pipe and an exhaust pipe are sequentially arranged above the diffusion section. An atomizing spray head is provided in the spray pipe, and an axial flow fan is provided between the spray pipe and the exhaust pipe; The large-diameter end of the diffusion section installs the spray pipe through a flange, and the atomizing spray head is arranged inside the spray pipe; the spraying direction of the atomizing spray head faces the filter filler; The axial flow fan draws air to generate a negative pressure in the solution tank, forcing gas and dust to enter the inlet section from the dust exhaust port; the contraction section causes the rising speed of the dust-containing gas to continuously increase because the cross-sectional area of the flow path decreases. When the dust-containing gas enters the annular spray head, the flow velocity of the gas reaches the maximum value; the annular spray head sprays out high-pressure fine water columns, which collide with the dust-containing gas reaching the annular spray head, and aggregate into larger particle ash water droplets and fall back into the solution tank; the diffusion section causes the rising speed of the dust-containing gas passing through the annular spray head to continuously decrease as the cross-sectional area of the flow path increases, and the pressure rises; the filter filler contacts the dust-containing gas passing through the diffusion section and adheres part of its dust; the atomizing spray head of the spray pipe sprays out water mist, and the remaining dust in the dust-containing gas is blocked by the gas film around the water mist and adheres into water droplets and falls back into the filter filler; the axial flow fan discharges the clean gas.

2. A multi-stage atomizing dust removal device according to claim 1, characterized in that: Both the atomizing spray head and the annular spray head are externally connected to a water inlet pipe. The water inlet pipe is divided into two paths, which are respectively connected to the atomizing spray head and the annular spray head. A regulating valve and a flow meter are provided on the water inlet pipe.

3. A multi-stage atomizing dust removal device according to claim 1, characterized in that: The annular spray head is a hollow annular structure, and a number of spray holes are evenly arranged on the inner side.

4. A multi-stage atomizing dust removal device according to claim 1, characterized in that: The filter filler is a Pall ring filler or a hollow sphere.

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