Pneumatic conveying device for dust removal and recovery

Abstract

The pneumatic conveying device comprises a rotary feeder, a conveying pipe and a terminal bin used for receiving, one end of the conveying pipe is communicated with the terminal bin, the other end of the conveying pipe is an air inlet communicated with a compressed air source, and the upper end of the conveying pipe is provided with the rotary feeder and communicated with a discharging opening; a ball used for decelerating and settling dedusting ash is arranged in the terminal bin, the ball is fixed to the inner wall of the terminal bin through a fixing rod, the ball is arranged at the position, located at an air outlet in the terminal bin, of the conveying pipe, and the diameter of the ball is larger than that of the conveying pipe. According to the pneumatic conveying device for dedusting and recycling, when the dedusting ash is conveyed into the terminal bin through the conveying pipe, airflow discharged by the conveying pipe and the dedusting ash flow around the surface of the ball in an arc mode, the speed of the airflow at the rear half part of the ball is obviously reduced, a vortex is formed, high resistance is generated, and the airflow and the dedusting ash can be separated in an accelerated mode. The dedusting ash settles at the bottom of the terminal bin, and the exhaust pipe is used for discharging redundant airflow to balance internal and external pressure.

Description

Technical Field

[0001] This application relates to pneumatic conveying technology in dust collection in refining furnaces, and more particularly to a pneumatic conveying device for dust collection and recovery. Background Technology

[0002] Dust collector ash is a powdery material that is efficiently and stably transported from the collection point to the briquetting machine using a pneumatic conveying system. This system controls airflow speed and pressure through pneumatic conveying technology, ensuring a closed-loop transport process within the pipeline. No impurities are mixed into the material, resulting in highly stable transport. Furthermore, the material does not scatter, preventing waste and causing no air pollution.

[0003] The existing pneumatic conveying system for dust collectors connects to a terminal silo. After the airflow carries the dust into the terminal silo, the airflow and dust are separated by natural settling. Once the dust settles at the bottom of the terminal silo, the airflow is discharged through an exhaust duct at the top. However, the existing pneumatic conveying system cannot effectively reduce the speed of the dust and airflow upon entering the terminal silo, resulting in slow and ineffective separation. Utility Model Content

[0004] This application provides a pneumatic conveying device for dust collection and recovery, which solves the problem that existing dust and airflow cannot be decelerated and separated in time after entering the terminal compartment through pneumatic conveying.

[0005] This application provides a pneumatic conveying device for dust collection and recovery, including a rotary feeder, a conveying pipe, and a terminal bin for receiving. One end of the conveying pipe is connected to the terminal bin, and the other end is an air inlet connected to a compressed air source. The upper end of the conveying pipe is provided with a rotary feeder and connected to a discharge port. The terminal bin is provided with a ball for decelerating and settling dust. The ball is fixed to the inner wall of the terminal bin by a fixing rod. The ball is located at the air outlet of the conveying pipe inside the terminal bin, and the diameter of the ball is larger than the diameter of the conveying pipe.

[0006] Optionally, a mesh plate for intercepting and slowing down dust is fixed on the diameter of the sphere.

[0007] Optionally, the sphere is provided with a frame fixed to the inner wall of the terminal compartment above it, and multiple parallel flow stabilizers are hinged to the frame, the lower ends of which can swing.

[0008] Optionally, the upper and lower ends of the sphere are respectively provided with settling devices fixed inside the terminal compartment. The cross-section of the settling device is a honeycomb shape composed of multiple regular hexagons, forming a vertical settling channel.

[0009] The pneumatic conveying device for dust removal and recovery provided by the application can accelerate the separation of the airflow and the dust removal ash. The dust removal ash is deposited at the bottom of the terminal bin, and the air exhaust pipe is used to exhaust the excess airflow to balance the internal and external pressure. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0011] Figure 1 The structural schematic diagram of the pneumatic conveying device for dust removal and recovery provided by an embodiment of the present application;

[0012] Figure 2 The pneumatic conveying device for dust removal and recovery provided by an embodiment of the present application Figure 1 The sectional view of the pneumatic conveying device for dust removal and recovery provided by an embodiment of the present application;

[0013] Figure 3 The top view of the flow stabilizing plate of the pneumatic conveying device for dust removal and recovery provided by an embodiment of the present application;

[0014] Figure 4 The top view of the settler of the pneumatic conveying device for dust removal and recovery provided by an embodiment of the present application.

[0015] Explanation of reference signs:

[0016] Rotary feeder 1; conveying pipe 2; terminal bin 3; air exhaust pipe 4; air inlet 5; fixed rod 6; spherical body 7; mesh plate 8; frame body 9; flow stabilizing plate 10; settler 11; discharge port 12. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor also belong to the protection scope of the present application.

[0018] As Figures 1-4As shown, an embodiment of the present application provides a pneumatic conveying device for dust removal and recovery, which comprises a rotary feeder 1, a conveying pipe 2 and a terminal bin 3 for receiving, the upper end of the terminal bin 3 is an exhaust pipe 4, and the lower end is a discharge port 12 for feeding a ball press, one end of the conveying pipe 2 is communicated with the terminal bin 3, and the other end is an air inlet 5 communicated with a compressed air source, the upper end of the conveying pipe 2 is provided with the rotary feeder 1 and is communicated with a discharge port, the terminal bin 3 is provided with a ball 7 for reducing the speed of dust-settling, the ball 7 is fixed to the inner wall of the terminal bin 3 through a fixing rod 6, the ball 7 is arranged at the air outlet of the conveying pipe 2 in the terminal bin 3, and the diameter of the ball 7 is greater than the diameter of the conveying pipe 2.

[0019] In use, the rotary feeder 1 is communicated with the dust hopper on the dust collector through a screw conveyor, each dust collector has two rows of 24 dust hoppers, and one screw conveyor is arranged below each row of dust hoppers, and the dust is conveyed into the rotary feeder 1 through the screw conveyor. The rotary feeder 1 successively discharges dust into the conveying pipe 2, and the dust in the conveying pipe 2 is conveyed to the terminal bin 3 along the pipeline by compressed air, and the discharge port 12 at the lower end of the terminal bin 3 is communicated with the hopper of the ball press, and the ball press is regularly fed.

[0020] The dust is conveyed into the terminal bin 3 through the conveying pipe 2, and when the dust is discharged from the air outlet of the conveying pipe 2 in the terminal bin 3, the airflow around the surface of the ball 7 is reduced in speed, and vortex shedding is formed at the tail, so as to promote the separation of the airflow and the dust for conveying, the airflow is discharged upward through the exhaust pipe 4, and the dust falls to the bottom of the terminal bin 3 under the action of gravity and is temporarily stored.

[0021] In the embodiment, when the dust is conveyed into the terminal bin 3 through the conveying pipe 2, the airflow and the dust discharged from the conveying pipe 2 flow along the arc surface of the ball 7, the airflow speed is significantly reduced at the rear half of the ball 7, and vortex flow is formed to generate high resistance, so as to accelerate the separation of the airflow and the dust. The dust settles at the bottom of the terminal bin 3, and the exhaust pipe 4 is used to discharge excess airflow to balance the pressure inside and outside.

[0022] In a possible implementation, a mesh plate 8 for intercepting the dust-settling dust is fixed on the diameter of the ball 7.

[0023] The mesh plate 8 is used to further reduce the speed of the airflow and the dust around the ball 7.

[0024] In a possible implementation, an arch 9 is arranged above the ball 7 and is fixed to the inner wall of the terminal bin 3, a plurality of parallel flow stabilizing plates 10 are hinged to the arch 9, and the lower ends of the flow stabilizing plates 10 can swing.

[0025] The flow stabilizing plates 10 are hinged to the arch 9 and can swing back and forth at the lower ends, and are used to absorb kinetic energy and guide the airflow discharged upward.

[0026] In one possible implementation, the upper and lower ends of the ball 7 are respectively provided with a settler 11 fixed in the terminal bin 3, the settler 11 has a honeycomb shape with a plurality of regular hexagons in cross section, forming vertical settling channels.

[0027] The honeycomb-shaped settler 11 forms a plurality of vertical settling channels, in which the airflow and the residual dust can be further separated during the upward movement, and the settler 11 at the lower end of the ball 7 can isolate the dust settled and collected at the bottom of the terminal bin 3, avoiding the disturbance of the transversely entering airflow to the dust settled at the bottom of the terminal bin 3.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand; it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pneumatic conveying device for dust removal and recovery, comprising a rotary feeder (1), a conveying pipe (2) and a terminal bin (3) for receiving, one end of the conveying pipe (2) being communicated with the terminal bin (3), the other end being an air inlet (5) communicated with a compressed air source, the upper end of the conveying pipe (2) being provided with the rotary feeder (1) and communicated with a discharge port, characterized in that: The terminal bin (3) is internally provided with a ball (7) for reducing speed and settling dust, the ball (7) is fixed with the inner wall of the terminal bin (3) through a fixing rod (6), the ball (7) is arranged at the air outlet of the material conveying pipe (2) in the terminal bin (3), and the diameter of the ball (7) is greater than that of the material conveying pipe (2). ​ 2. The pneumatic conveying apparatus for dust removal and recovery according to claim 1, characterized by: A mesh plate (8) for intercepting the dust is fixed on the diameter of the ball (7).

3. The pneumatic conveying apparatus for dust removal and recovery according to claim 1, characterized by: An upper portion of the ball (7) is provided with a frame (9) fixed with the inner wall of the terminal bin (3), a plurality of parallel flow stabilizing plates (10) are hingedly arranged on the frame (9), and the lower end of the flow stabilizing plate (10) can swing.

4. The pneumatic conveying device for dust removal and recovery according to any one of claims 1 to 3, characterized in that: The upper and lower ends of the ball (7) are respectively provided with a settler (11) fixed in the terminal bin (3), the settler (11) has a honeycomb shape formed by a plurality of regular hexagons in cross section, and a vertical settling channel is formed.

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