Residue filtering device suitable for blast furnace coal injection main pipeline

Abstract

A slag filtering device suitable for a blast furnace coal injection main pipeline comprises two slag filtering parts, the heads of the two slag filtering parts are both communicated with the front section of the coal injection main pipeline, and the tails of the two slag filtering parts are both communicated with the rear section of the coal injection main pipeline. The residue filtering part comprises a coal filtering mechanism, a hole sealing mechanism, a back flushing mechanism and an impurity removing mechanism; the coal filtering mechanism is arranged on the coal injection main pipeline; the back flushing mechanism is arranged on the coal filtering mechanism; the hole sealing mechanism and the impurity removing mechanism are both arranged on the ground, located under the coal filtering mechanism and in contact with the coal filtering mechanism. The grate net cleaning efficiency is improved, and the labor intensity of workers is reduced.

Description

Technical Field

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

[0002] The automatic cleaning device for filtering the main pipeline of the blast furnace coal injection system is one of the important devices of the injection system. The current mainstream coal injection method adopts a double-tank parallel injection method, one tank is working and the other is standby, and the two tanks are alternated to complete the injection; among them, the raw coal contains impurities and coal fibers, and the coal powder will be impurities during the pulverizing and grinding process; the impurities will clog the blast furnace spray gun along with the coal powder, affecting the stability of the blast furnace coal volume; therefore, a filter is provided on the coal injection main pipeline, and the filter is a cylindrical structure, and a circular grate is provided inside it, and the circular grate can filter the impurities carried in the coal powder; after a period of actual use, too much impurities will accumulate on the grate impurities, thus affecting the filtering effect; the grate needs to be cleaned. At present, the cleaning of the circular grate is done manually, and manual cleaning has the following disadvantages: the efficiency of manual cleaning is low, and the efficiency is low; secondly, there are safety risks when manually cleaning the coal injection main pipeline filter. When cleaning the blast furnace coal injection main pipeline filter, some harmful gases remain in the main pipeline filter. Workers will inevitably inhale some harmful gases when cleaning the filter, which is not conducive to the health of the workers; therefore, a filter residue device is needed, which is required to replace the original filter, and automatically clean the impurities on the grate while effectively filtering the coal powder. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a slag filtering device suitable for a blast furnace coal injection main pipeline, which can not only reduce the labor intensity of the staff but also improve the cleaning efficiency of impurities on the grate.

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

[0005] A slag filter device suitable for a coal injection main pipeline of a blast furnace comprises two slag filter parts, and the heads of the two slag filter parts are both connected to the front section of the coal injection main pipeline, and the tails of the two slag filter parts are both connected to the rear section of the coal injection main pipeline; the slag filter parts comprise a coal filtering mechanism, a sealing mechanism, a recoil mechanism and an impurity removal mechanism; the coal filtering mechanism is arranged on the coal injection main pipeline; the recoil mechanism is arranged on the coal filtering mechanism; the sealing mechanism and the impurity removal mechanism are both arranged on the ground, and are both located directly below the coal filtering mechanism, and are both in contact with the coal filtering mechanism.

[0006] The above-mentioned slag filtering device is suitable for the coal injection main pipeline of the blast furnace, and the coal filtering mechanism includes a front branch pipe, a rear branch pipe, a front solenoid valve, a rear solenoid valve, a filter cartridge and a grate; the front branch pipe and the rear branch pipe are respectively arranged at the two ends of the filter cartridge; the front end of the front branch pipe is connected to the front section of the coal injection main pipeline, and the rear end of the rear branch pipe is connected to the rear section of the coal injection main pipeline; the front solenoid valve is arranged on the front branch pipe, and the rear solenoid valve is arranged on the rear branch pipe; the grate is arranged on the inner wall of the filter cartridge; the signal input ends of the front solenoid valve and the rear solenoid valve are both connected to the signal output ends of the CPU.

[0007] The above-mentioned slag filtering device is suitable for the main pipeline of coal injection in a blast furnace, and the recoil mechanism includes an air pipe and a first solenoid valve; one end of the air pipe is connected to the rear branch pipe, and the other end is connected to the high-pressure air source; the first solenoid valve is arranged on the air pipe, and the signal input end of the first solenoid valve is connected to the signal output end of the CPU.

[0008] The above-mentioned slag filtering device is suitable for the main pipeline of coal injection in a blast furnace, and the sealing mechanism includes a sealing plug, a first square sealing ring, a first square bracket, a vertical guide rod, a guide column and a first cylinder; a vertical square slag discharge hole is arranged at the bottom end of the side wall of the filter cartridge, and the square slag discharge hole is located on the side of the grate close to the front branch pipe; the sealing plug is arranged in the square slag discharge hole, and the outer wall of the sealing plug is tightly fitted with the inner wall of the square slag discharge hole; the first square sealing ring touches and presses on the outer wall of the filter cartridge, and the first square sealing ring touches and presses on the junction of the sealing plug and the square slag discharge hole; the first square bracket is arranged in the first The bottom end of a square sealing ring; the first square bracket is connected to the sealing plug through a support rod; vertical guide rods are arranged at the four corners of the lower end face of the first square bracket; the guide column is arranged on the ground, and guide holes are arranged at the four corners of its upper end face, and each vertical guide rod is inserted into the corresponding guide hole at the position directly below it; a vertical hole is arranged at the center of the upper end face of the guide column, and the first cylinder is arranged in the vertical hole of the guide column, and the end of the piston rod of the first cylinder is connected to the first square bracket; the signal input end of the first cylinder is connected to the signal output end of the CPU.

[0009] The above-mentioned slag filter device is suitable for the main pipeline of coal injection in a blast furnace, and the impurity removal mechanism includes a second square sealing ring, a second square bracket, a horizontal plate, a horizontal guide rod, a second cylinder and a dust removal bag; the horizontal plate is set on the ground through the bracket, and it is located below the filter cartridge; the second square sealing ring touches the lower end surface of the filter cartridge, and the connecting line between the center point of the second square sealing ring and the center point of the first square sealing ring is parallel to the axis of the filter cartridge; the second square bracket is set on the lower end surface of the second square sealing ring; a horizontal guide rod is set on the second square bracket, and a guide hole is set on the horizontal plate, the horizontal guide rod is inserted into the guide hole of the horizontal plate, and the center line of the horizontal guide rod is parallel to the axis of the filter cartridge; the horizontal plate is provided with a hole at the center of the end surface close to the second square bracket, and the second cylinder is set in the center hole of the horizontal plate, the end of the second cylinder piston rod is connected to the second square bracket, and the axis of the second cylinder piston rod is parallel to the axis of the filter cartridge; the dust removal bag is set on the bottom end surface of the second square bracket; the signal input end of the second cylinder is connected to the signal output end of the CPU.

[0010] The utility model ensures that when one filter residue part is in use, the other filter residue part can be self-cleaned to ensure smooth grate mesh by using the two filter residue parts alternately; the coal powder is effectively filtered by the coal filtering mechanism; the impurities on the grate mesh are cleaned out of the filter cartridge by the cooperation of the sealing mechanism, the recoil mechanism and the impurity removal mechanism. 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 partial enlarged structural schematic diagram of the utility model A.

[0013] The list of numbers in the figure is: 1. front branch pipe, 2. rear branch pipe, 3. front solenoid valve, 4. rear solenoid valve, 5. filter cartridge, 6. air pipe, 7. first solenoid valve, 8. sealing plug, 9. first square sealing ring, 10. first square bracket, 11. vertical guide rod, 12. guide column, 13. first cylinder, 14. second square sealing ring, 15. second square bracket, 16. horizontal plate, 17. horizontal guide rod, 18. dust bag. DETAILED DESCRIPTION

[0014] See also Figure 1 and Figure 2 The utility model includes two filter residue parts, and the heads of the two filter residue parts are connected to the front section of the coal injection main pipeline, and the tails of the two filter residue parts are connected to the rear section of the coal injection main pipeline; the two filter residue parts are used alternately, when one is performing the filter residue operation, the other is on standby or performing self-cleaning operation.

[0015] The filter residue part includes a coal filtering mechanism, a sealing mechanism, a recoil mechanism and a debris removal mechanism; the coal filtering mechanism is arranged on the coal injection main pipeline; the recoil mechanism is arranged on the coal filtering mechanism; the coal filtering mechanism is used to filter the coal powder that has passed through and filter the impurities wrapped by it; the recoil mechanism is used to clean the impurities accumulated on the grate; the sealing mechanism and the debris removal mechanism are both arranged on the ground, and are both located directly below the coal filtering mechanism, and are both in contact with the coal filtering mechanism; the sealing mechanism is used to seal the square slag discharge holes on the side wall of the filter cartridge, and is only opened when cleaning the slag.

[0016] The coal filtering mechanism includes a front branch pipe 1, a rear branch pipe 2, a front solenoid valve 3, a rear solenoid valve 4, a filter cartridge 5 and a grate; the front branch pipe 1 and the rear branch pipe 2 are respectively arranged at the two ends of the filter cartridge 5; the front end of the front branch pipe 1 is connected to the front section of the coal injection main pipeline, and the rear end of the rear branch pipe 2 is connected to the rear section of the coal injection main pipeline; the coal powder passes through the front branch pipe 1, the filter cartridge 5 and the rear branch pipe 2 in sequence; the front solenoid valve 3 is arranged on the front branch pipe 1, and the rear solenoid valve 4 is arranged on the rear branch pipe 2; the front solenoid valve 3 is used to control the on and off of the front branch pipe 1; the rear solenoid valve 4 is used to control the on and off of the rear branch pipe 2; the grate is arranged on the inner wall of the filter cartridge 5; the coal powder can pass through the grate, but impurities with larger sizes cannot pass through, thereby playing a filtering role; the signal input ends of the front solenoid valve 3 and the rear solenoid valve 4 are both connected to the signal output ends of the CPU.

[0017] The recoil mechanism includes an air pipe 6 and a first solenoid valve 7; one end of the air pipe 6 is connected to the rear branch pipe 2, and the other end is connected to the high-pressure air source; the first solenoid valve 7 is arranged on the air pipe 6, and the signal input end of the first solenoid valve 7 is connected to the signal output end of the CPU; the first solenoid valve 7 is used to control the on and off of the air pipe 6; the high-pressure air source passes through the air pipe 6 into the rear branch pipe, and the high-pressure airflow reversely flushes the grate mesh to flush down the impurities accumulated on the grate mesh.

[0018] The sealing mechanism includes a sealing plug 8, a first square sealing ring 9, a first square bracket 10, a vertical guide rod 11, a guide column 12 and a first cylinder 13; a vertical square slag discharge hole is provided at the bottom end of the side wall of the filter cartridge 5, and the square slag discharge hole is used for discharging impurities in the filter cartridge 5; the square slag discharge hole is located on the side of the grate close to the front branch pipe 1, and since the impurities accumulated on the grate are located on the side of the grate close to the front branch pipe 1, the square slag discharge hole is opened on the side close to the front branch pipe 1; the sealing plug 8 is arranged in the square slag discharge hole, and the outer wall of the sealing plug 8 is tightly fitted with the inner wall of the square slag discharge hole; the sealing plug 8 can block the square slag discharge hole to prevent air leakage and coal powder; the first square sealing ring 9 is pressed on the outer wall of the filter cartridge 5, and the first square sealing ring 9 is pressed on the junction of the sealing plug 8 and the square slag discharge hole; the first square sealing ring 9 provides double protection, isolates the joint between the sealing plug 8 and the square slag discharge hole, and plays a double sealing role; the first A square bracket 10 is arranged at the bottom end of the first square sealing ring 9; the first square bracket 10 is connected to the sealing plug 8 through a support rod; vertical guide rods 11 are arranged at the four corners of the lower end face of the first square bracket 10; the guide column 12 is arranged on the ground, and the four corners of its upper end face are arranged with guide holes, and each vertical guide rod 11 is respectively inserted into the corresponding guide hole at the position directly below it; the vertical guide rod 11 provides a guiding function for the lifting and lowering of the sealing plug 8, the first square sealing ring 9 and the first square bracket 10 combination; a vertical hole is arranged at the center of the upper end face of the guide column 12, and the first cylinder 13 is arranged in the vertical hole of the guide column 12, and the end of the piston rod of the first cylinder 13 is connected to the first square bracket 10; the function of the first cylinder 13 is to drive the sealing plug 8, the first square sealing ring 9, and the first square bracket 10 combination to take off and land vertically; the signal input end of the first cylinder 13 is connected to the signal output end of the CPU.

[0019] The impurity removal mechanism includes a second square sealing ring 14, a second square bracket 15, a horizontal plate 16, a horizontal guide rod 17, a second cylinder and a dust bag 18; the horizontal plate 16 is set on the ground through a bracket, and it is located below the filter cartridge 5; the second square sealing ring 14 contacts the lower end surface of the filter cartridge 5, and the connecting line between the center point of the second square sealing ring 14 and the center point of the first square sealing ring 9 is parallel to the axis of the filter cartridge 5; the second square bracket 15 is set on the lower end surface of the second square sealing ring 14; the forward direction of the second square sealing ring 14 points to the square slag discharge hole, so that the second square sealing ring 14 can dock with the square slag discharge hole to receive impurities discharged from the square slag discharge hole; the second square bracket 15 is provided with a horizontal guide rod 17, and the horizontal plate 16 is provided with a guide hole, and the horizontal guide rod 17 Inserted in the guide hole of the horizontal plate 16, the center line of the horizontal guide rod 17 is parallel to the axis line of the filter cartridge 5; the horizontal guide rod 17 provides a guide for the advancement of the second square sealing ring 14 to ensure that it can reliably dock with the square slag discharge hole; the horizontal plate 16 is provided with a hole at the center of the end face close to the second square bracket 15, and the second cylinder is arranged in the center hole of the horizontal plate 16, the end of the second cylinder piston rod is connected to the second square bracket 15, and the axis line of the second cylinder piston rod is parallel to the axis line of the filter cartridge 5; the extension and retraction of the second cylinder piston rod can drive the second square sealing ring 14 to approach or move away from the square slag discharge hole of the filter cartridge; the dust removal bag 18 is arranged on the bottom end face of the second square bracket 15; the recoil high-pressure cylinder carries impurities and discharges them from the square slag discharge hole, and the signal input end of the second cylinder is connected to the signal output end of the CPU.

[0020] The model of the CPU module in the utility model is 87C196KC.

[0021] Actual use process: Under normal conditions, one filter residue part is in operation and the other filter residue part is on standby; the grate cleaning operation in the filter residue part is carried out regularly. When the filter residue part needs to be cleaned, the front solenoid valve 3 and the rear solenoid valve 4 are used to prevent coal powder from passing through the filter cartridge 5; then the first cylinder 13 is actuated to drive the piston rod downward, so that the first square sealing ring 9 and the sealing plug 8 are moved downward to expose the square slag discharge hole, and then the second cylinder is actuated to drive the second square sealing ring 14 forward until it docks with the square slag discharge hole. At this time, the dust bag 18 is located directly below the slag discharge hole; then the first solenoid valve 7 is opened to allow the high-pressure airflow to enter the filter cartridge to impact the grate in the opposite direction, and the airflow carries impurities through the square slag discharge hole into the dust bag 18. After a period of time, the first solenoid valve 7 is closed, and then the second cylinder is reset, and then the first cylinder is reset to re-seal the square slag discharge hole on the filter cartridge, and the filter cartridge grate cleaning operation is completed; the staff only needs to regularly clean the dust bag 18 in turn.

Claims

1. A slag filter device suitable for a blast furnace coal injection main pipeline, characterized in that: It comprises two filter residue parts, and the heads of the two filter residue parts are connected to the front section of the coal injection main pipeline, and the tails of the two filter residue parts are connected to the rear section of the coal injection main pipeline; the filter residue parts comprise a coal filtering mechanism, a sealing mechanism, a recoil mechanism and a debris removal mechanism; the coal filtering mechanism is arranged on the coal injection main pipeline; the recoil mechanism is arranged on the coal filtering mechanism; the sealing mechanism and the debris removal mechanism are both arranged on the ground, and are both located directly below the coal filtering mechanism, and are both in contact with the coal filtering mechanism.

2. The slag filter device suitable for the blast furnace coal injection main pipeline according to claim 1, characterized in that: The coal filtering mechanism comprises a front branch pipe (1), a rear branch pipe (2), a front solenoid valve (3), a rear solenoid valve (4), a filter cartridge (5) and a grate; the front branch pipe (1) and the rear branch pipe (2) are respectively arranged at two ends of the filter cartridge (5); the front end of the front branch pipe (1) is connected to the front section of the coal injection main pipeline, and the rear end of the rear branch pipe (2) is connected to the rear section of the coal injection main pipeline; the front solenoid valve (3) is arranged on the front branch pipe (1), and the rear solenoid valve (4) is arranged on the rear branch pipe (2); the grate is arranged on the inner wall of the filter cartridge (5); the signal input ends of the front solenoid valve (3) and the rear solenoid valve (4) are both connected to the signal output end of the CPU.

3. The slag filter device suitable for the blast furnace coal injection main pipeline according to claim 2, characterized in that: The recoil mechanism comprises an air pipe (6) and a first solenoid valve (7); one end of the air pipe (6) is connected to the rear branch pipe (2), and the other end is connected to the high-pressure air source; the first solenoid valve (7) is arranged on the air pipe (6), and a signal input end of the first solenoid valve (7) is connected to a signal output end of the CPU.

4. The slag filter device suitable for the blast furnace coal injection main pipeline according to claim 3 is characterized in that: The sealing mechanism comprises a sealing plug (8), a first square sealing ring (9), a first square bracket (10), a vertical guide rod (11), a guide column (12) and a first cylinder (13); a vertical square slag discharge hole is provided at the bottom end of the side wall of the filter cartridge (5), and the square slag discharge hole is located on a side of the grate close to the front branch pipe (1); the sealing plug (8) is arranged in the square slag discharge hole, and the outer wall of the sealing plug (8) is tightly fitted with the inner wall of the square slag discharge hole; the first square sealing ring (9) contacts and presses on the outer wall of the filter cartridge (5), and the first square sealing ring (9) contacts and presses on the junction of the sealing plug (8) and the square slag discharge hole; the first square bracket (10) is arranged on the first square sealing ring (9) the bottom end of the first square bracket (10) being connected to the sealing plug (8) through a support rod; vertical guide rods (11) are provided at four corners of the lower end surface of the first square bracket (10); the guide column (12) is arranged on the ground, and guide holes are provided at four corners of its upper end surface, and each vertical guide rod (11) is inserted into a corresponding guide hole at a position directly below the guide column (12); a vertical hole is provided at the center of the upper end surface of the guide column (12), and the first cylinder (13) is arranged in the vertical hole of the guide column (12), and the end of the piston rod of the first cylinder (13) is connected to the first square bracket (10); the signal input end of the first cylinder (13) is connected to the signal output end of the CPU.

5. The slag filter device suitable for the blast furnace coal injection main pipeline according to claim 4 is characterized in that: The impurity removal mechanism comprises a second square sealing ring (14), a second square bracket (15), a horizontal plate (16), a horizontal guide rod (17), a second cylinder and a dust removal bag (18); the horizontal plate (16) is arranged on the ground through the bracket and is located below the filter cartridge (5); the second square sealing ring (14) contacts and presses on the lower end surface of the filter cartridge (5), and a connecting line between the center point of the second square sealing ring (14) and the center point of the first square sealing ring (9) is parallel to the axis line of the filter cartridge (5); the second square bracket (15) is arranged on the lower end surface of the second square sealing ring (14); a horizontal guide rod (17) is arranged on the second square bracket (15); 7), and a guide hole is provided on the horizontal plate (16), a horizontal guide rod (17) is inserted into the guide hole of the horizontal plate (16), and the center line of the horizontal guide rod (17) is parallel to the axis line of the filter cartridge (5); the horizontal plate (16) is provided with a hole near the center of the end surface of the second square bracket (15), and the second cylinder is arranged in the center hole of the horizontal plate (16), the end of the second cylinder piston rod is connected to the second square bracket (15), and the axis line of the second cylinder piston rod is parallel to the axis line of the filter cartridge (5); the dust bag (18) is arranged on the bottom end surface of the second square bracket (15); the signal input end of the second cylinder is connected to the signal output end of the CPU.

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