Filtering device for blast furnace coal injection pipeline

Abstract

A filtering device for a blast furnace coal injection pipeline comprises a filtering cylinder, a front valve, a rear valve, a filtering net, a slag scraping part, a slag pushing part and a slag collecting cylinder. A front valve is arranged at the front end of the filter cartridge and is in butt joint with the front section of the coal injection pipeline, and a rear valve is arranged at the rear end of the filter cartridge and is in butt joint with the rear section of the coal injection pipeline; the filter screen is arranged on the inner wall of the filter cartridge; the slag scraping part is positioned in the filter cartridge and is arranged on the filter screen; the slag pushing part and the slag collecting cylinder are both arranged at the bottom end of the circumferential outer wall of the filtering cylinder, and the slag pushing part is in butt joint with the slag collecting cylinder. According to the utility model, the filtering effect of impurities in the coal injection pipeline is effectively improved, the filter screen is efficiently cleaned, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a device capable of filtering impurities in coal powder in a coal injection pipeline of a blast furnace, belonging to the technical field of coal injection pipeline filtering equipment. Background Art

[0002] Blast furnace injection refers to the measure of injecting coal powder into the blast furnace through the coal injection pipe during the ironmaking process; the coal raw material is ground in the vertical mill. Due to the presence of impurities in the coal raw material, the coal powder produced by the vertical mill is mixed with impurities. The impurities move along the coal injection pipe in the coal powder and eventually enter the blast furnace; the presence of impurities will clog the coal injection gun, and eventually affect the reliability of coal supply to the blast furnace; at present, the problem of impurities is solved by a filter. The filter is a cylindrical structure, which is installed on the coal injection pipe, and a filter is provided on the inner wall of the cylindrical filter to filter impurities in the coal powder; after a period of actual use, a large amount of impurities will accumulate on the filter, which leads to poor filtering effect of the filter and affects the passing efficiency of the coal powder; therefore, the filter in the filter needs to be filtered regularly; the cleaning of the filter is done manually, which is not only inefficient but also has safety hazards; therefore, a filtering device is needed, which is required to be able to efficiently filter impurities in the coal powder and automatically clean the impurities on the filter. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a filtering device for a blast furnace coal injection pipeline, which can not only reduce the labor intensity of the staff but also improve the cleaning efficiency of the filter screen.

[0004] The problem described in the present invention is solved by the following technical solutions:

[0005] A filtering device for a blast furnace coal injection pipeline, comprising a filter cartridge, a front valve, a rear valve, a filter screen, a slag scraping portion, a slag pushing portion and a slag collecting barrel; the front end of the filter cartridge is provided with a front valve, and the front valve is docked with the front section of the coal injection pipeline, and the rear end of the filter cartridge is provided with a rear valve, and the rear valve is docked with the rear section of the coal injection pipeline; the filter screen is provided on the inner wall of the filter cartridge; the slag scraping portion is located in the filter cartridge and is provided on the filter screen; the slag pushing portion and the slag collecting barrel are both provided at the bottom end of the circumferential outer wall of the filter cartridge, and the slag pushing portion is docked with the slag collecting barrel.

[0006] The above-mentioned filtering device for the blast furnace pulverized coal injection pipeline, wherein the slag scraping part includes a motor, a protective cover, a rotating shaft, a first connecting rod, and a second connecting rod; the motor housing is arranged at the center of the end face of the filter screen close to the rear valve, and the protective cover is sleeved outside the motor; the rotating shaft is pivotally arranged at the center of the end face of the filter screen close to the front valve, and the output shaft of the motor penetrates the filter screen and is connected to one end of the rotating shaft; the first connecting rod is arranged on the circumferential side wall of the rotating shaft, and the second connecting rod is arranged at the end of the first connecting rod far from the rotating shaft; a brush is arranged on the end face of the first connecting rod close to the filter screen, and the brush on the first connecting rod presses against the end face of the filter screen close to the front valve; a brush is arranged on the end face of the second connecting rod close to the inner wall of the filter cylinder, and the brush on the second connecting rod presses against the inner wall of the filter cylinder, and the center line of the second connecting rod is parallel to the axis line of the filter cylinder.

[0007] The above-mentioned filtering device for the blast furnace pulverized coal injection pipeline, wherein the slag pushing part includes an electric cylinder, a square push rod, and a square cylinder; a vertical strip-shaped hole is arranged on the bottom end face of the side wall of the filter cylinder, and the length direction line of the strip-shaped hole is parallel to the axis line of the filter cylinder; the square cylinder is arranged at the bottom end of the outer wall of the filter cylinder, and the center line of the through hole of the square cylinder is parallel to the axis line of the filter cylinder; a long hole is arranged on the top end face of the square cylinder, and the long hole of the square cylinder is in butt joint with the strip-shaped hole at the bottom end of the filter cylinder; the electric cylinder is arranged on the bottom end face of the square cylinder; the square push rod is inserted into the horizontal through hole of the square cylinder, and the end of the piston rod of the electric cylinder is connected to the connecting plate on the bottom end face of the square push rod.

[0008] A hole is arranged on the side wall of the above-mentioned slag collection cylinder, and the hole on the slag collection cylinder is in butt joint with the end of the inner through hole of the square cylinder far from the connecting plate; an opening and closing door is arranged on the side wall of the slag collection cylinder.

[0009] The utility model filters the impurities in the pulverized coal through the cooperation of the filter cylinder and the filter screen; the slag scraping part pushes and sweeps the impurities accumulated on the filter screen and the filter cylinder, pushes the impurities into the square cylinder, and through the cooperation of the electric cylinder and the square push rod, the swept impurities are pushed into the slag collection cylinder for collection. Description of the Drawings

[0010] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0011] Figure 2 It is a schematic diagram of the internal structure of the filter cylinder of the utility model.

[0012] The list of each label in the figure is as follows: 1. Filter cylinder, 2. Front valve, 3. Rear valve, 4. Filter screen, 5. Slag collection cylinder, 6. Rotating shaft, 7. First connecting rod, 8. Second connecting rod, 9. Electric cylinder, 10. Square push rod, 11. Square cylinder. Detailed Embodiment

[0013] See Figure 1 and Figure 2 , the utility model includes a filter cylinder 1, a front valve 2, a rear valve 3, a filter screen 4, a slag scraping part, a slag pushing part and a slag collecting cylinder 5; a front valve 2 is arranged at the front end of the filter cylinder 1, and the front valve 2 is butted against the front section of the pulverized coal injection pipeline. A rear valve 3 is arranged at the rear end of the filter cylinder 1, and the rear valve 3 is butted against the rear section of the pulverized coal injection pipeline. The connection between the pulverized coal injection pipeline and the filter cylinder 1 is controlled by the front valve 2 and the rear valve 3; the filter screen 4 is arranged on the inner wall of the filter cylinder 1; the slag scraping part is located inside the filter cylinder 1 and is arranged on the filter screen 4. The slag scraping part can clean the impurities on the filter screen 4 and the inner wall of the filter cylinder 2, and then push the impurities into the lower slag pushing part and finally into the slag collecting cylinder 5; the slag pushing part and the slag collecting cylinder 5 are both arranged at the bottom end of the circumferential outer wall of the filter cylinder 1, and the slag pushing part is butted against the slag collecting cylinder 5.

[0014] The slag scraping part includes a motor, a protective cover, a rotating shaft 6, a first connecting rod 7 and a second connecting rod 8; the motor housing is arranged at the center of the end face of the filter screen 4 close to the rear valve 3, and the protective cover is sleeved outside the motor. The protective cover provides protection for the motor; the rotating shaft 6 is pivotally arranged at the center of the end face of the filter screen 4 close to the front valve 2, and the output shaft of the motor passes through the filter screen 4 and is connected to one end of the rotating shaft 6. The motor can drive the rotating shaft 6 to rotate, and then drive the first connecting rod 7 and the second connecting rod 8 on the rotating shaft 6 to rotate with the axis line of the rotating shaft as the center line; the first connecting rod 7 is arranged on the circumferential side wall of the rotating shaft 6, and the second connecting rod 8 is arranged at one end of the first connecting rod 7 far from the rotating shaft 6; a brush is arranged on the end face of the first connecting rod 7 close to the filter screen 4, and the brush on the first connecting rod 7 presses against the end face of the filter screen 4 close to the front valve 2; a brush is arranged on the end face of the second connecting rod 8 close to the inner wall of the filter cylinder 1, and the brush on the second connecting rod 8 presses against the inner wall of the filter cylinder 1. The center line of the second connecting rod 8 is parallel to the axis line of the filter cylinder 1. The rotating shaft drives the first connecting rod and the second connecting rod to rotate synchronously, and during the rotation process, the brush on the first connecting rod cleans the impurities on the filter screen 4; the brush on the second connecting rod cleans the impurities on the inner wall of the filter cylinder 1.

[0015] The slag pushing part includes an electric cylinder 9, a square push rod 10 and a square cylinder 11; a vertical strip-shaped hole is provided at the bottom end surface of the side wall of the filter cylinder 1, and the length direction line of the strip-shaped hole is parallel to the axis line of the filter cylinder 1; the impurities swept off the filter cylinder and the filter mesh enter the strip-shaped hole of the filter cylinder 1 and then enter the square cylinder 11; the square cylinder 11 is arranged at the bottom end of the outer wall of the filter cylinder 1, and the center line of the through hole of the square cylinder 11 is parallel to the axis line of the filter cylinder 1; a long hole is provided on the top end surface of the square cylinder 11, and the long hole of the square cylinder 11 is in butt joint with the strip-shaped hole at the bottom end of the filter cylinder 1; the impurities in the filter cylinder 1 enter the square cylinder 11 through the long hole of the square cylinder 11 from the strip-shaped hole at the bottom end of the filter cylinder 1; the electric cylinder 9 is arranged on the bottom end surface of the square cylinder 11; the square push rod 10 is inserted into the horizontal through hole of the square cylinder 11, and the end of the piston rod of the electric cylinder 9 is connected to the connecting plate on the bottom end surface of the square push rod 10; the electric cylinder 9 can drive the square push rod 10 to slide in the square cylinder 11, so as to push the swept-off impurities into the slag collection cylinder 5.

[0016] A hole is provided on the side wall of the slag collection cylinder 5, and the hole on the slag collection cylinder 5 is in butt joint with the end of the inner through hole of the square cylinder 11 far away from the connecting plate; the impurities in the square cylinder 11 enter the slag collection cylinder 5 under the push of the square push rod 10; an opening and closing door is provided on the side wall of the slag collection cylinder 5.

[0017] Principle of use: In the initial state, the square push rod 10 is located in the square cylinder 11 and blocks the long hole at the top end of the square cylinder 11; when it is necessary to clean the filter mesh 4, close the front valve and the rear valve, and then start the electric cylinder 9 to drive the square push rod 10 to slide, so that the strip-shaped hole at the bottom end of the filter cylinder 1 is in butt joint with the long hole at the top end of the square cylinder 11; then start the motor to drive the rotating shaft 6 to rotate, drive the first connecting rod 7 and the second connecting rod 8 to rotate, and the brush bristles clean the impurities accumulated on the filter cylinder 1 and the filter mesh 4 during the axial movement; and push the impurities to the lower square cylinder 11. After a period of time, when the cleaning of the filter mesh and the filter cylinder 1 is completed, start the electric cylinder 9 to reset. During the reset process of the square push rod 10, it pushes the impurities in the square cylinder 11 forward into the slag collection cylinder 5, and finally successfully conveys the impurities on the filter cylinder 1 and the filter mesh 4 to the slag collection cylinder 5.

Claims

1. A filtering device for a pulverized coal injection pipeline in a blast furnace, characterized in that: It includes a filter cartridge (1), a front valve (2), a rear valve (3), a filter screen (4), a slag scraping part, a slag pushing part and a slag collection cylinder (5); a front valve (2) is arranged at the front end of the filter cartridge (1), and the front valve (2) is docked with the front section of the pulverized coal injection pipeline. A rear valve (3) is arranged at the rear end of the filter cartridge (1), and the rear valve (3) is docked with the rear section of the pulverized coal injection pipeline; the filter screen (4) is arranged on the inner wall of the filter cartridge (1); the slag scraping part is located inside the filter cartridge (1) and is arranged on the filter screen (4); both the slag pushing part and the slag collection cylinder (5) are arranged at the bottom end of the circumferential outer wall of the filter cartridge (1), and the slag pushing part is docked with the slag collection cylinder (5).

2. The filtering device for the pulverized coal injection pipeline of a blast furnace according to claim 1, characterized in that: The slag scraping part includes a motor, a protective cover, a rotating shaft (6), a first connecting rod (7), and a second connecting rod (8); the motor housing is arranged at the center of the end face of the filter screen (4) close to the rear valve (3), and the protective cover is sleeved outside the motor; the rotating shaft (6) is pivotally arranged at the center of the end face of the filter screen (4) close to the front valve (2), and the output shaft of the motor passes through the filter screen (4) and is connected to one end of the rotating shaft (6); the first connecting rod (7) is arranged on the circumferential side wall of the rotating shaft (6), and the second connecting rod (8) is arranged at one end of the first connecting rod (7) away from the rotating shaft (6); bristles are arranged on the end face of the first connecting rod (7) close to the filter screen (4), and the bristles on the first connecting rod (7) press against the end face of the filter screen (4) close to the front valve (2); bristles are arranged on the end face of the second connecting rod (8) close to the inner wall of the filter cartridge (1), and the bristles on the second connecting rod (8) press against the inner wall of the filter cartridge (1). The center line of the second connecting rod (8) is parallel to the axis line of the filter cartridge (1).

3. The filtering device for the pulverized coal injection pipeline of a blast furnace according to claim 2, wherein: The slag pushing part includes an electric cylinder (9), a square push rod (10) and a square cylinder (11); a vertical strip-shaped hole is arranged on the bottom end face of the side wall of the filter cartridge (1), and the length direction line of the strip-shaped hole is parallel to the axis line of the filter cartridge (1); the square cylinder (11) is arranged at the bottom end of the outer wall of the filter cartridge (1), and the center line of the through hole of the square cylinder (11) is parallel to the axis line of the filter cartridge (1); a long hole is arranged on the top end face of the square cylinder (11), and the long hole of the square cylinder (11) is in a matching connection with the strip-shaped hole at the bottom end of the filter cartridge (1); the electric cylinder (9) is arranged on the bottom end face of the square cylinder (11); the square push rod (10) is inserted into the horizontal through hole of the square cylinder (11), and the end of the piston rod of the electric cylinder (9) is connected to the connecting plate on the bottom end face of the square push rod (10).

4. The filtering device for the pulverized coal injection pipeline of a blast furnace according to claim 3, characterized in that: A hole is arranged on the side wall of the slag collection cylinder (5), and the hole on the slag collection cylinder (5) is docked with the end of the inner through hole of the square cylinder (11) away from the connecting plate; an opening and closing door is arranged on the side wall of the slag collection cylinder (5).

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