Dust removal device for blast furnace ironmaking

Abstract

The utility model relates to the technical field of blast furnace flue gas treatment, and particularly discloses a blast furnace ironmaking dust removal device which comprises a filtering dust removal mechanism, a vibrating mechanism and a dust removal tank with an opening in the top, the filtering dust removal mechanism is provided with two groups of filter screens, a connecting plate is connected between the two groups of filter screens, and the middle of the connecting plate is connected with a rotating motor; the rotating motor controls one of the two groups of filter screens to enter the dust removal tank, and a hydraulic cylinder is mounted below the rotating motor and controls the filter screens to lift integrally; the vibrating mechanism is provided with a vibrating rod and a lifting motor, the vibrating rod is installed above the filter screen, and the lifting motor controls the vibrating rod to ascend and descend to impact the filter screen; according to the blast furnace ironmaking dust removal device and the working method, particle impurities attached to the filter element can be removed while dust is removed, so that the middle downtime is greatly shortened, and the flue gas dust removal efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace smoke treatment, in particular to a blast furnace ironmaking dust removal device. Background Art

[0002] Blast furnace ironmaking is a method of continuously producing liquid pig iron in a blast furnace using coke, iron-containing ore and flux. This method benefits from the advantages of relatively simple process, large output, high labor productivity and low energy consumption. Therefore, this traditional blast furnace ironmaking is still the main method of modern ironmaking. During the ironmaking process, a large amount of flue gas will be generated. These flue gases contain a lot of carbon dioxide, carbon monoxide, nitrogen oxides, water vapor and other organic matter and solid smoke, etc. Among them, solid smoke contains particulate matter such as iron, iron oxides, limestone, and coal ash. Therefore, when treating the flue gas, it is necessary to first remove the dust from the flue gas to remove the particulate impurities, and then perform desulfurization, denitrification, acid-base neutralization and other treatments on the removed flue gas.

[0003] At present, the commonly used dust removal method is to use filter elements such as filter screens and filter bags to filter the flue gas. However, when using this treatment method, it is found that, on the one hand, in the long-term dust removal process, more particulate impurities will adhere to the filter element. These particulate impurities can easily block the filter holes, thereby causing the filtering performance of the filter element to decrease, and it is necessary to clean it many times. On the other hand, when cleaning the filter element, it is necessary to stop the machine first, and then take out the filter element for cleaning. The entire stage requires waiting for the cleaning to be completed before continuing to start the equipment for dust removal, which greatly reduces the dust removal efficiency.

[0004] Therefore, it is necessary to design a blast furnace ironmaking dust removal device to solve the problem that the existing flue gas dust removal equipment needs to be shut down for cleaning, resulting in low dust removal efficiency and affecting normal production efficiency. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a blast furnace ironmaking dust removal device, which can remove particulate impurities attached to the filter element while removing dust, thereby improving the dust removal efficiency.

[0006] The utility model solves the technical problem by adopting the following technical solution: a blast furnace ironmaking dust removal device, comprising a filtering dust removal mechanism, a vibrating mechanism and a dust removal tank with an opening at the top, wherein the filtering dust removal mechanism is provided with two groups of filter screens, a connecting plate is connected between the two groups of filter screens, a rotating motor is connected to the middle of the connecting plate, the rotating motor controls one of the two groups of filter screens to enter the dust removal tank, a hydraulic cylinder is installed below the rotating motor, and the hydraulic cylinder controls the overall lifting of the filter screen;

[0007] The vibrating mechanism is provided with a vibrating rod and a lifting motor. The vibrating rod is installed above the filter screen, and the lifting motor controls the lifting of the vibrating rod to impact the filter screen.

[0008] Specifically, the dust removal tank is fixedly installed on the base. A dust discharge pipe is fixedly installed at the bottom of the dust removal tank. A threaded cover is sleeved on the dust discharge pipe by threads. An air inlet pipe is fixedly installed on the dust removal tank.

[0009] Specifically, the hydraulic cylinder is installed on the base. A support frame is fixedly installed on the output shaft of the hydraulic cylinder. An installation frame is fixedly installed at the top of the support frame. A rotating shaft is rotatably installed in the installation frame. A connecting plate is fixedly installed at the top end of the rotating shaft. Two connecting rods are fixedly installed at the bottom of the connecting plate. The bottom end of one of the connecting rods extends into the dust removal tank. Fixing sleeves are respectively fixedly sleeved on the two connecting rods. The two fixing sleeves are both adapted to the dust removal tank. And the bottom of one of the fixing sleeves is in contact with the top of the dust removal tank. Exhaust pipes are fixedly installed on both of the two fixing sleeves.

[0010] Specifically, a rotating motor is fixedly installed at the bottom of the installation frame. The rotating motor is located inside the support frame. The output shaft of the rotating motor is fixedly connected to the bottom end of the rotating shaft.

[0011] Specifically, a U-shaped frame one is fixedly installed at the bottom end of each of the connecting rods. A U-shaped frame two is fixed at the bottom of each of the two U-shaped frame ones. Connecting rings are fixedly installed at the bottom of each of the two U-shaped frame twos by bolts. The air inlet pipe is located below the connecting rings. Filter meshes are fixedly installed in each of the two connecting rings. The connecting ring inside the dust removal tank is in contact with the inner wall of the dust removal tank. A vibrating mechanism is provided on each of the two U-shaped frame twos. The vibrating mechanism shakes off the particulate impurities adhering to the filter meshes.

[0012] Specifically, the vibrating mechanism further includes two sliding rods. The bottom ends of the two sliding rods are fixedly installed with the same cross. Four vibrating rods are fixedly installed at the bottom of the cross. The vibrating rods are in contact with the filter meshes. Cover plates are fixedly installed at the top ends of the two sliding rods. Return springs are sleeved on each of the two sliding rods. The top end of the return spring is fixedly connected to the cover plate. The bottom end of the return spring is fixedly connected to the U-shaped frame two. A toothed column is fixedly installed at the top of the cross. The toothed column penetrates through the top of the U-shaped frame two and is movably connected to the top of the U-shaped frame two. A back plate is fixedly installed at the top of the U-shaped frame two. A connecting rod is rotatably installed on the back plate. A toothless gear is fixedly sleeved on the connecting rod. The toothless gear is meshed with the toothed column.

[0013] Specifically, a lifting motor is fixedly installed on one side of the back plate. The output shaft of the lifting motor is fixedly connected to one end of the connecting rod.

[0014] Specifically, the four vibrating rods are distributed in a circular array.

[0015] Specifically, a movable opening is formed at the top of the U-shaped frame two. The toothed column penetrates through the movable opening and is movably connected to the inner wall of the movable opening.

[0016] The utility model has the following beneficial effects:

[0017] The dust removal device for blast furnace ironmaking designed by the utility model forms a vibrating form on the filter screen during the dust removal process of flue gas through the arranged vibrating mechanism, shakes off the particulate impurities attached to it and blocked in the filter holes, so as to ensure that the filter screen always maintains good filtering performance during the dust removal process. Moreover, when replacing the filter screen, by rotating the connecting plate, the two connecting rings can be alternately positioned with each other, and then the dust removal work can be continued on one side while the used filter screen is replaced on the other side, thereby greatly reducing the intermediate downtime and improving the flue gas dust removal efficiency. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the dust removal device for blast furnace ironmaking.

[0019] Figure 2 It is a structural schematic diagram of the separation of the connecting ring and the dust removal tank.

[0020] Figure 3 It is a structural schematic diagram of the connection of the rotating shaft, the connecting plate and the two connecting rods.

[0021] Figure 4 It is a structural schematic diagram of the connection of the U-shaped frame one, the U-shaped frame two and the connecting ring.

[0022] Figure 5 It is for Figure 4 The rear view structural schematic diagram shown.

[0023] In the figure: 1 - base; 2 - dust removal tank; 3 - intake pipe; 4 - hydraulic cylinder; 5 - support frame; 6 - mounting frame; 7 - rotating shaft; 8 - connecting plate; 9 - connecting rod; 10 - cover plate; 11 - exhaust pipe; 12 - U-shaped frame one; 13 - U-shaped frame two; 14 - connecting ring; 15 - filter screen; 16 - sliding rod; 17 - cross; 18 - vibrating rod; 19 - cover piece; 20 - return spring; 21 - toothed column; 22 - back plate; 23 - connecting rod; 24 - toothless gear. Detailed Implementation Modes

[0024] The following will further clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0025] Embodiment 1.

[0026] As Figure 1-Figure 5As shown in the figure, a dust removal device for blast furnace ironmaking includes a base 1 and a dust removal tank 2 with an open top. The dust removal tank 2 is fixed on the base 1, and a dust discharge pipe is fixed at the bottom of the dust removal tank 2, on which a threaded cover is sleeved in a threaded manner, facilitating the opening of the dust discharge pipe to pour out particulate impurities. An air inlet pipe 3 is fixed on the dust removal tank 2, and a hydraulic cylinder 4 is fixed on the top of the base 1. A support frame 5 is fixed on the output shaft of the hydraulic cylinder 4. An installation frame 6 is fixed on the top of the support frame 5. A rotating shaft 7 is rotatably installed in the installation frame 6. A rotating motor located inside the support frame 5 is fixed at the bottom of the installation frame 6, and its output shaft is fixedly connected to the bottom end of the rotating shaft 7. A connecting plate 8 is fixed at the top end of the rotating shaft 7, and two connecting rods 9 are fixed at the bottom of the connecting plate 8. The bottom end of one of the connecting rods 9 extends into the dust removal tank 2. Cover plates 10 are fixedly sleeved on both of the two connecting rods 9. Both of the two cover plates 10 are adapted to the dust removal tank 2, and the bottom of one of the cover plates 10 is in contact with the top of the dust removal tank 2, so that the top of the dust removal tank 2 can be sealed. After sealing the opening of the dust removal tank 2, in order to discharge the dust-removed flue gas, exhaust pipes 11 are fixed on both of the two cover plates 10. The exhaust pipes 11 can be connected to the next processing step through an external pipeline, so as to conduct the dust-removed flue gas. At the bottom ends of both of the two connecting rods 9, U-shaped frames one 12 are fixed. At the bottom of both of the two U-shaped frames one 12, U-shaped frames two 13 are fixed. Connecting rings 14 are fixed at the bottom of both of the two U-shaped frames two 13 through bolts. Filter screens 15 are fixed inside both of the two connecting rings 14. The connecting rings 14 and the U-shaped frames two 13 are set to be detachably connected, facilitating the subsequent replacement of the filter screens 15. The air inlet pipe 3 is arranged below the connecting rings 14, so that the gas can float from bottom to top and pass through the filter screens 15 for filtration. The connecting rings 14 located inside the dust removal tank 2 are in contact with the inner wall of the dust removal tank 2, ensuring that the incoming flue gas can be thoroughly filtered. Vibration mechanisms are arranged on both of the two U-shaped frames two 13 to shake off the particulate impurities attached to the filter screens 15.

[0027] In the two vibrating mechanisms set up above, each vibrating mechanism includes two slide bars 16, the bottom ends of the two slide bars 16 are fixed with the same cross 17, the bottom of the cross 17 is fixed with four vibrating rods 18 distributed in a circular array, the vibrating rods 18 are in conflict with the filter screen 15, the top ends of the two slide bars 16 are fixed with a cover sheet 19, the two slide bars 16 are sleeved with a return spring 20, the top end of the return spring 20 is fixedly connected to the cover sheet 19, and the bottom end is fixedly connected to the profile frame 13, and the top of the cross 17 is fixed A toothed column 21 is provided, and a movable opening is opened at the top of the bevel frame 13. The toothed column 21 is arranged to pass through the movable opening and is movably connected to the inner wall of the movable opening, so that the toothed column 21 and the bevel frame 13 are in a movable relationship. A back plate 22 is fixed to the top of the bevel frame 13, and a connecting rod 23 is rotatably mounted on the back plate 22. A toothless gear 24 is fixedly sleeved on the connecting rod 23, and the toothless gear 24 is meshed with the toothed column 21. A lifting motor is fixed to one side of the back plate 22, and its output shaft is fixedly connected to one end of the connecting rod 23.

[0028] Embodiment 2, the working principle of the blast furnace ironmaking dust removal device adopting the structural form of embodiment 1.

[0029] Before dust removal, place a dust collecting box under the dust removal tank 2;

[0030] When dedusting the blast furnace flue gas, the flue gas is first discharged into the dust removal tank 2 through the air inlet pipe 3. The flue gas with particulate impurities will rise and pass through the filter screen 15 in the dust removal tank 2. When passing through, the particulate impurities in the flue gas are intercepted, and some of them fall directly on the bottom of the dust removal tank 2, and some are directly attached to the bottom of the filter screen 15. After that, the filtered flue gas is discharged into the next treatment process through the exhaust pipe 11;

[0031] During the process of filtering and dust removal, in order to ensure the filtering performance of the filter screen 15, the corresponding lifting motor can be started. Its output shaft drives the corresponding connecting rod 23 to rotate, and then can drive the missing tooth gear 24 to rotate. When the teeth on it mesh with the teeth on the tooth column 21, it will drive the tooth column 21 and the corresponding cross 17 to rise, taking the corresponding four vibrating rods 18 away from the filter screen 15. And at this time, the corresponding return spring 20 is in a stretched state. When the teeth on the missing tooth gear 24 are separated from the teeth on the tooth column 21, the stretched return spring 20 pulls back, quickly driving the cross 17 and the vibrating rod 18 downward. Finally, the vibrating rod 18 collides with the filter screen 15, so as to form vibrations on the filter screen 15, shaking off the particulate impurities attached to it and the dust impurities blocking the filter holes until the missing tooth gear 24 meshes with the tooth column 21 again, and then the vibrating rod 18 can be driven upward again. When the two are separated, the vibrating rod 18 is directly installed on the filter screen 15 again. In this way, the filter screen 15 can be continuously vibrated, ensuring the filtering performance of the filter screen 15 during the dust removal process. After the dust removal is completed, the threaded cover on the ash discharge pipe can be opened to collect the particulate impurities centrally;

[0032] In subsequent use, when the filter screen 15 needs to be replaced, the output shaft of the hydraulic cylinder 4 can be started to extend, taking out the connecting ring 14 in the dust removal tank 2. Then start the rotating motor, and its output shaft drives the rotating shaft 7 to rotate. When the connecting plate 8 rotates 180°, turn off the rotating motor. At this time, the two connecting rings 14 have exchanged positions with each other. Then start the output shaft of the hydraulic cylinder 4 to retract, bringing the unused filter screen 15 into the dust removal tank 2, and then the flue gas can be continuously dust-removed. On the other hand, the used filter screen 15 together with the connecting ring 14 can be removed from the corresponding U-shaped frame two 13, and then a new one can be replaced.

[0033] Compared with the related technology, the blast furnace ironmaking dust removal device provided by the present utility model can form a vibrating form on the filter screen 15 during the dust removal process of the flue gas through the arranged vibrating mechanism, shaking off the particulate impurities attached to it and blocking the filter holes, so as to ensure that the filter screen 15 always maintains good filtering performance during the dust removal process. And when replacing the filter screen 15, by rotating the connecting plate 8, the two connecting rings 14 can be exchanged positions with each other, and then the dust removal work can be continued on one side while the used filter screen 15 is replaced on the other side, thus greatly reducing the intermediate shutdown time and improving the flue gas dust removal efficiency.

[0034] The present utility model is not limited to the above embodiments. Anyone should know that the structural changes made under the inspiration of the present utility model, as long as they have the same or similar technical solutions as the present utility model, all fall within the protection scope of the present utility model.

[0035] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A blast furnace ironmaking dust removal device, characterized in that: It includes a filtering and dust removal mechanism, a vibrating mechanism, and a dust removal tank with an open top. The filtering and dust removal mechanism is provided with two groups of filter nets. An adapter plate is connected between the two groups of filter nets. The middle of the adapter plate is connected with a rotary motor, which controls one of the two groups of filter nets to enter the dust removal tank. A hydraulic cylinder is installed below the rotary motor, and the hydraulic cylinder controls the overall lifting of the filter net. The vibrating mechanism is provided with a vibrating rod and a lifting motor. The vibrating rod is installed above the filter net, and the lifting motor controls the vibrating rod to lift and strike the filter net.

2. The blast furnace ironmaking dust removal device according to claim 1, characterized in that: The dust removal tank is fixedly installed on the base. A dust discharge pipe is fixedly installed at the bottom of the dust removal tank. A threaded cover is sleeved on the dust discharge pipe in a threaded manner. An air inlet pipe is fixedly installed on the dust removal tank.

3. The blast furnace ironmaking dust removal device according to claim 1, characterized in that: The hydraulic cylinder is installed on the base. A support frame is fixedly installed on the output shaft of the hydraulic cylinder. The top of the support frame is fixedly installed with a mounting frame. A rotary shaft is rotatably installed in the mounting frame. The top of the rotary shaft is fixedly installed with an adapter plate. Two connecting rods are fixedly installed at the bottom of the adapter plate. The bottom end of one of the connecting rods extends into the dust removal tank. Two cover plates are fixedly sleeved on the two connecting rods. Both cover plates are adapted to the dust removal tank, and the bottom of one of the cover plates is in contact with the top of the dust removal tank. Exhaust pipes are fixedly installed on both cover plates.

4. The blast furnace ironmaking dust removal device according to claim 3, characterized in that: A rotary motor is fixedly installed at the bottom of the mounting frame. The rotary motor is located inside the support frame, and the output shaft of the rotary motor is fixedly connected to the bottom end of the rotary shaft.

5. The blast furnace ironmaking dust removal device according to claim 3, characterized in that: The bottom ends of the connecting rods are fixedly installed with U-shaped frames I. The bottoms of the two U-shaped frames I are both fixed with U-shaped frames II. The bottoms of the two U-shaped frames II are both fixedly installed with connecting rings through bolts. The air inlet pipe is located below the connecting rings. Filter nets are fixedly installed in both connecting rings. The connecting ring inside the dust removal tank is in contact with the inner wall of the dust removal tank. Vibrating mechanisms are provided on both U-shaped frames II to shake off the particulate impurities attached to the filter net.

6. The blast furnace ironmaking dust removal device according to claim 5, characterized in that: The vibrating mechanism is further provided with two sliding rods. The bottom ends of the two sliding rods are fixedly installed with the same cross. Four vibrating rods are fixedly installed at the bottom of the cross. The vibrating rods are in contact with the filter net. Cover plates are fixedly installed at the top ends of the two sliding rods. Return springs are sleeved on the two sliding rods. The top end of the return spring is fixedly connected to the cover plate, and the bottom end of the return spring is fixedly connected to the U-shaped frame II. A toothed column is fixedly installed at the top of the cross. The toothed column penetrates through the top of the U-shaped frame II and is movably connected to the top of the U-shaped frame II. A back plate is fixedly installed at the top of the U-shaped frame II. A connecting rod is rotatably installed on the back plate. A toothless gear is fixedly sleeved on the connecting rod. The toothless gear is meshed with the toothed column.

7. The blast furnace ironmaking dust removal device according to claim 6, characterized in that: A lifting motor is fixedly installed on one side of the back plate. The output shaft of the lifting motor is fixedly connected to one end of the connecting rod.

8. The blast furnace ironmaking dust removal device according to claim 6, characterized in that: The four vibrating rods are distributed in a circular array.

9. The blast furnace ironmaking dust removal device according to claim 6, characterized in that: An activity opening is formed at the top of the U-shaped frame II. The toothed column penetrates through the activity opening and is movably connected to the inner wall of the activity opening.

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