Diffused pulverized coal filtering device for blast furnace injection tank

Abstract

The utility model discloses a diffused pulverized coal filtering device for a blast furnace injection tank. The diffused pulverized coal filtering device comprises an opening and closing part, a cylindrical filter screen, a cylindrical shell, a lifting piece and a powder scraping part, the cylindrical shell is arranged on the side wall of the diffusion tank, the lower half part of the cylindrical shell is located in the injection tank, and the upper end of the side wall of the cylindrical shell is connected with a diffusion pipeline through a pipeline; the opening and closing part is positioned at the bottom end of the cylindrical shell; the lifting piece is arranged at the top end of the cylindrical shell, and the opening and closing part is connected with the lifting piece; a cylindrical filter screen is arranged at the bottom end of the lifting part and is positioned in the cylindrical shell; and the powder scraping part is arranged on the lifting piece and is in contact with the cylindrical filter screen. According to the utility model, the pulverized coal in the diffused gas of the injection tank is effectively filtered out.

Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a device capable of filtering coal powder carried by an airflow when a spray tank releases gas, and belongs to the technical field of filtering equipment for coal powder released by a spray tank. Background Art

[0002] The injection tank is an important equipment for pulverized coal injection in blast furnaces. Its main function is to fill the qualified pulverized coal with gas, so that a certain pressure is formed in the injection tank, the pulverized coal and the gas are fully mixed, and then the pulverized coal is ejected by the fluidized bed at the bottom of the injection tank and the outlet pipe, so that the pulverized coal is transported to the blast furnace through the pipe and the pulverized coal is fully burned in the blast furnace; generally, each blast furnace has two or three injection tanks to supply pulverized coal for it, and the pulverized coal is injected alternately during the injection process. When one tank of pulverized coal is injected, it is necessary to use other injection tanks for injection, and this tank needs to release the pressure in the tank, and during the release process, pulverized coal will be brought to the release pipe, which will cause blockage and wear of the release pipe over time, and seriously affect the normal coal injection of the blast furnace; therefore, a filtering device is needed, which is required to filter the pulverized coal entrained in the injection tank when the pressure is released, to ensure that only the pressurized airflow enters the release pipe from the injection tank, reducing the adverse effects on the release pipe. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and to provide a pulverized coal filter device for a blast furnace injection tank, which can effectively filter the pulverized coal contained in the airflow entering the emission pipe from the injection tank to prevent the pulverized coal from entering the emission pipe.

[0004] The problem described in the utility model is solved by the following technical solutions:

[0005] A coal powder filtration device for a blast furnace injection tank comprises an opening and closing part, a cylindrical filter screen, a cylindrical shell, a lifting member and a powder scraping part; the cylindrical shell is arranged on the side wall of the emission tank, and the lower half of the cylindrical shell is located inside the injection tank, and the upper end of the side wall of the cylindrical shell is connected to the emission pipe through a pipe; the opening and closing part is located at the bottom end of the cylindrical shell; the lifting member is arranged at the top end of the cylindrical shell, and the opening and closing part is connected to the lifting member; the cylindrical filter screen is arranged at the bottom end of the lifting member, and it is located inside the cylindrical shell; the powder scraping part is arranged on the lifting member, and it contacts with the cylindrical filter screen.

[0006] The above-mentioned coal powder dispersion filtering device for blast furnace injection tank, the lifting part includes an upper disc, a cylinder and a lifting cylinder; the upper disc is arranged at the top of the cylinder shell; the bottom end of the cylinder shell is provided with an annular hole, and the annular hole is located between the inner wall and the outer wall of the cylinder shell; the lifting cylinder is inserted into the annular hole at the bottom end of the cylinder shell; the cylinder housing is arranged on the upper end surface of the upper disc, and the cylinder piston rod vertically passes through the cylinder shell and is connected to the top of the lifting cylinder.

[0007] In the above-mentioned pulverized coal filtering device for blast furnace injection tank, the cylindrical filter is arranged at the center of the lower end surface of the upper disc; and a plurality of filter holes are evenly arranged on the side wall of the cylindrical filter.

[0008] The above-mentioned coal powder dispersion filtering device for the blast furnace injection tank, the powder scraping part includes a connecting rod, a vertical rod and a first motor; the housing of the first motor is arranged at a central position on the upper end surface of the upper disc; the output shaft of the first motor passes through the upper disc, and a connecting rod is arranged at the end of the output shaft of the first motor, and a vertical rod is arranged at the end of the connecting rod, and a wire brush is arranged on the vertical rod, and the wire brush is in contact with the inner wall of the cylindrical filter.

[0009] The above-mentioned coal powder filtration device for blast furnace injection tank, the opening and closing part includes a vertical cylinder, a second motor, a baffle and a chassis; the chassis is disc-shaped, and a vertical through hole is arranged in the center thereof, and the diameter of the central through hole of the chassis is smaller than the inner diameter of the cylindrical filter; the upper end surface of the chassis is hourglass-shaped and concave inwardly; the outer edge of the upper end surface of the chassis is connected to the outer edge of the lower end surface of the lifting cylinder; the vertical cylinder is arranged in the center position of the lower end surface of the chassis, and the upper end opening of the vertical cylinder is connected to the lower end opening of the chassis; the upper end surface of the chassis is provided with a vertical groove, and the second motor is arranged in the groove of the upper end surface of the chassis, and the output shaft of the second motor passes through the chassis; the end of the output shaft of the second motor is connected to the edge of the upper end surface of the baffle; the baffle is located directly below the vertical cylinder, and the upper end surface of the baffle is in contact with the bottom end surface of the vertical cylinder, and the diameter of the baffle is larger than the outer diameter of the vertical cylinder.

[0010] The utility model controls the opening and closing of the emission channel by the cooperation of the opening and closing part and the lifting part; effectively filters the coal powder carried in the emission airflow through the cylindrical filter screen; effectively cleans the coal powder adhering to the cylindrical filter screen through the powder scraping part, thereby ensuring the smooth filtering operation of the cylindrical filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model after removing the cylindrical shell.

[0013] The list of reference numerals in the figure is: 1. cylindrical filter screen, 2. cylindrical shell, 3. upper disc, 4. cylinder, 5. first motor, 6. vertical cylinder, 7. second motor, 8. baffle plate, 9. chassis. DETAILED DESCRIPTION

[0014] See also Figure 1 and Figure 2 The utility model comprises an opening and closing part, a cylindrical filter screen 1, a cylindrical shell 2, a lifting member and a powder scraping part; the cylindrical shell 2 is arranged on the side wall of the dispersion tank, and the lower half of the cylindrical shell 2 is located inside the spray tank, and the high-pressure airflow in the spray tank passes through the cylindrical filter screen 1 and then passes through the cylindrical shell 2 to enter the dispersion pipe; the upper end of the side wall of the cylindrical shell 2 is connected to the dispersion pipe through a pipe; the opening and closing part is located at the bottom end of the cylindrical shell 2; the lifting member is arranged at the top end of the cylindrical shell 2, and the opening and closing part is connected to the lifting member; the lifting member can drive the opening and closing part to rise and fall, and then discharge the coal powder accumulated in the cylindrical shell 2; the cylindrical filter screen 1 is arranged at the bottom end of the lifting member, and it is located inside the cylindrical shell 2; the powder scraping part is arranged on the lifting member, and it contacts with the cylindrical filter screen 1.

[0015] The lifting member includes an upper disc 3, a cylinder 4 and a lifting cylinder; the upper disc 3 is arranged at the top of the cylinder shell 2; the bottom end of the cylinder shell 2 is provided with an annular hole, which is located between the inner wall and the outer wall of the cylinder shell 2; the lifting cylinder is inserted into the annular hole at the bottom end of the cylinder shell 2, that is, the lifting cylinder is located in the body of the cylinder shell 2, and the lifting cylinder can be lifted and lowered, and through the descent of the lifting cylinder, the cylindrical filter 1 no longer blocks the passage of the coal powder on the chassis 9 to the vertical cylinder 6; so that the coal powder accumulated on the upper end surface of the chassis 9 can be discharged through the vertical cylinder 6; the shell of the cylinder 4 is arranged on the upper end surface of the upper disc 3, and the piston rod of the cylinder 4 vertically passes through the cylinder shell 2 and is connected to the top of the lifting cylinder; the cylinder 4 can drive the lifting cylinder to take off and fall vertically.

[0016] The cylindrical filter screen 1 is arranged at the center of the lower end surface of the upper disc 3; a plurality of filter holes are evenly arranged on the side wall of the cylindrical filter screen 1; when the diffused airflow passes through the cylindrical filter screen 1, the coal powder remains on the cylindrical filter screen 1, and the airflow can pass through.

[0017] The powder scraping part includes a connecting rod, a vertical rod and a first motor 5; the shell of the first motor 5 is arranged at the center position of the upper end surface of the upper disc 3; the output shaft of the first motor 5 passes through the upper disc 3, and the end of the output shaft of the first motor 5 is provided with a connecting rod, and the end of the connecting rod is provided with a vertical rod, and a wire brush is provided on the vertical rod, and the wire brush is in contact with the inner wall of the cylindrical filter 1; the first motor 5 can drive the connecting rod to rotate, and then drive the vertical rod to rotate synchronously, and during the rotation and movement of the vertical rod, the wire brush on it cleans the inner wall of the cylindrical filter 1 along the way and sweeps off the adhered coal powder.

[0018] The opening and closing part includes a vertical cylinder 6, a second motor 7, a baffle 8 and a chassis 9; the chassis 9 is in the shape of a disk and has a vertical through hole in the center, the diameter of the central through hole of the chassis 9 is smaller than the inner diameter of the cylindrical filter 1; the upper end surface of the chassis 9 is in the shape of an hourglass and is concave inward; this allows the coal powder that falls on the chassis 9 to slide freely into the vertical cylinder 6 and be discharged; the outer edge of the upper end surface of the chassis 9 is connected to the outer edge of the lower end surface of the lifting cylinder; the lifting cylinder drives the chassis 9 to rise and fall synchronously; the vertical cylinder 6 is arranged at the center of the lower end surface of the chassis 9, and the upper end surface of the vertical cylinder 6 The end opening is docked with the lower end opening of the chassis 9; a vertical groove is provided on the upper end surface of the chassis 9, and the second motor 7 is arranged in the groove on the upper end surface of the chassis 9, and the output shaft of the second motor 7 passes through the chassis 9; the end of the output shaft of the second motor 7 is connected to the edge of the upper end surface of the baffle 8; the second motor 7 can drive the baffle 8 to move, and then control the baffle to move to the bottom of the vertical cylinder 6 to block or leave the vertical cylinder 6 to open the channel; the baffle 8 is located directly below the vertical cylinder 6, and the upper end surface of the baffle 8 is in contact with the bottom end surface of the vertical cylinder 6, and the diameter of the baffle 8 is larger than the outer diameter of the vertical cylinder 6.

[0019] Actual use process: when it is necessary to release the gas, the baffle 8 does not contact the vertical cylinder 6, and the released airflow and coal powder pass through the cylindrical filter 1 and the cylindrical shell 2 and enter the release pipe. When the airflow passes through the cylindrical filter 1, the coal powder is intercepted on the cylindrical filter 1, achieving the purpose of coal powder interception; when it is not necessary to release the gas, the second motor 7 drives the baffle 8 to move to the bottom of the vertical cylinder 6 to close the channel of the vertical cylinder 6; when it is necessary to clean the accumulated coal powder in the filter device; the baffle 8 blocks the channel of the vertical cylinder 6 at this time; the first motor The start-up drives the vertical rod to rotate, and the wire brush cleans the coal powder accumulated on the inner wall of the cylindrical filter 1; at the same time, the cylinder 4 is actuated to drive the chassis 9 to descend. At this time, the coal powder accumulated on the upper end surface of the chassis 9 is no longer blocked by the cylindrical filter 1, and the funnel shape of the upper end surface of the chassis 9 allows the coal powder to naturally slide into the vertical cylinder 6 and fall onto the baffle 8; after the cleaning operation is completed, the cylinder 4 is reset, so that the opening at the bottom end of the cylindrical filter 1 is re-connected with the opening at the upper end of the chassis 9; then the second motor 7 is started to open the vertical cylinder 6 to discharge the cleaned coal powder.

Claims

1. A pulverized coal filter device for a blast furnace injection tank, characterized in that: The invention comprises an opening and closing part, a cylindrical filter screen (1), a cylindrical shell (2), a lifting member and a powder scraping part; the cylindrical shell (2) is arranged on the side wall of the emission tank, and the lower half of the cylindrical shell (2) is located inside the spray tank, and the upper end of the side wall of the cylindrical shell (2) is connected to the emission pipe via a pipe; the opening and closing part is located at the bottom end of the cylindrical shell (2); the lifting member is arranged at the top end of the cylindrical shell (2), and the opening and closing part is connected to the lifting member; the cylindrical filter screen (1) is arranged at the bottom end of the lifting member, and is located inside the cylindrical shell (2); the powder scraping part is arranged on the lifting member, and is in contact with the cylindrical filter screen (1).

2. The pulverized coal filter device for a blast furnace injection tank according to claim 1 is characterized in that: The lifting member comprises an upper disc (3), a cylinder (4) and a lifting cylinder; the upper disc (3) is arranged at the top end of the cylinder shell (2); an annular hole is arranged at the bottom end of the cylinder shell (2), and the annular hole is located between the inner wall and the outer wall of the cylinder shell (2); the lifting cylinder is inserted into the annular hole at the bottom end of the cylinder shell (2); the cylinder (4) shell is arranged on the upper end surface of the upper disc (3), and the cylinder (4) piston rod vertically passes through the cylinder shell (2) and is connected to the top end of the lifting cylinder.

3. The pulverized coal filter device for a blast furnace injection tank according to claim 2 is characterized in that: The cylindrical filter screen (1) is arranged at a central position on the lower end surface of the upper disc (3); a plurality of filter holes are evenly arranged on the side wall of the cylindrical filter screen (1).

4. The pulverized coal filter device for a blast furnace injection tank according to claim 3 is characterized in that: The powder scraping part comprises a connecting rod, a vertical rod and a first motor (5); the housing of the first motor (5) is arranged at a central position of the upper end surface of the upper disc (3); the output shaft of the first motor (5) passes through the upper disc (3), and a connecting rod is arranged at the end of the output shaft of the first motor (5), and a vertical rod is arranged at the end of the connecting rod, and a wire brush is arranged on the vertical rod, and the wire brush contacts the inner wall of the cylindrical filter (1).

5. The pulverized coal filter device for a blast furnace injection tank according to claim 4 is characterized in that: The opening and closing part comprises a vertical cylinder (6), a second motor (7), a baffle (8) and a chassis (9); the chassis (9) is in the shape of a disk and has a vertical through hole at its center, the diameter of the center through hole of the chassis (9) being smaller than the inner diameter of the cylindrical filter screen (1); the upper end surface of the chassis (9) is in the shape of an hourglass and is concave inward; the outer edge of the upper end surface of the chassis (9) is connected to the outer edge of the lower end surface of the lifting cylinder; the vertical cylinder (6) is arranged at the center of the lower end surface of the chassis (9), and the upper end of the vertical cylinder (6) is The upper end opening of the chassis (9) is butted against the lower end opening of the chassis (9); a vertical groove is provided on the upper end surface of the chassis (9), and the second motor (7) is arranged in the groove on the upper end surface of the chassis (9), and the output shaft of the second motor (7) passes through the chassis (9); the end of the output shaft of the second motor (7) is connected to the upper end surface edge of the baffle (8); the baffle (8) is located directly below the vertical cylinder (6), and the upper end surface of the baffle (8) contacts the bottom end surface of the vertical cylinder (6), and the diameter of the baffle (8) is larger than the outer diameter of the vertical cylinder (6).

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