Gas dust removal device for blast furnace

Abstract

The utility model relates to a coal gas dust removal device for a blast furnace, which comprises the blast furnace and a dust remover, a transfer mechanism is arranged between the blast furnace and the dust remover, the transfer mechanism is provided with a filter mechanism, the transfer mechanism comprises a filter bin, the filter bin is arranged between the blast furnace and the dust remover, and the filter bin is provided with a fan and a discharge pipe. An outlet of the fan communicates with a connecting pipe with one end communicating with the dust remover, an inlet of the fan communicates with an extraction pipe communicating with the filtering bin, and the extraction pipe is provided with a first electromagnetic valve and a fresh air pipe. According to the coal gas dust removal device for the blast furnace, through the arrangement of the transfer mechanism, when the transfer mechanism normally operates, coal gas generated in the blast furnace can enter the dust remover after being pre-filtered by the filtering mechanism, so that the dust content of the coal gas is reduced, and the use efficiency and effect of the dust remover are improved; and the filtering mechanism is cleaned, so that the complexity of manual cleaning is avoided, and the gas transportation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas treatment technology, specifically to a gas dust removal device for blast furnaces. Background Technology

[0002] Blast furnace gas is the gas that escapes from the top of the blast furnace. It is a byproduct of the blast furnace ironmaking process. During the gas treatment process, it carries a large amount of dust, which is usually removed by a dust collector before proceeding to the next step.

[0003] A deep purification and dust removal device for blast furnace gas is proposed in Chinese Patent Publication No. CN220745981U. This device alternately transports flue gas through a gas downcomer to two branch pipes. A central processing box located in the middle of the branch pipe pre-treats the flue gas, and a filter screen in a filter frame filters the flue gas, effectively shortening the subsequent flue gas treatment time. By controlling the solenoid valves at both ends of the branch pipe to be closed, while alternately controlling the solenoid valves at both ends of the other branch pipe to be open, the flue gas alternately passes through the other branch pipe, allowing for convenient cleaning of the preliminary filter components in both branch pipes while ensuring normal flue gas transport. Rotating the shaft drives the horizontal block, which in turn moves the locking rod relative to the through slot, causing the lower end of the locking rod to slide out of the fixed slot on the filter frame. This pulls the sealing plate, causing the filter frame to slide out of the insertion port, and causing multiple rollers on the internal frame to rotate, thus quickly removing the filter frame from the central processing box.

[0004] In the process of developing this application, the inventors discovered that the technology has at least the following problems: In the process of pre-cleaning dust in existing gas dust removal devices, two pipes are used alternately to filter dust, and the filter screen in the pipe is not used for cleaning. However, the cleaning of the filter screen mostly relies on manual cleaning, which makes the cleaning steps cumbersome and troublesome, and the continuous cleaning effect is not good, thereby reducing the cleaning efficiency and affecting the transportation and processing of gas. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a gas dust removal device for blast furnaces, which has advantages such as automatic filter screen cleaning and solves the problem of poor efficiency of manual filter screen cleaning in existing powder pre-cleaning processes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gas dust removal device for a blast furnace, comprising a blast furnace and a dust collector, wherein a transfer mechanism is provided between the blast furnace and the dust collector, and the transfer mechanism is provided with a filtration mechanism;

[0007] The transfer mechanism includes a filter chamber located between the blast furnace and the dust collector. The filter chamber is equipped with a fan and an exhaust pipe. The fan outlet is connected to a connecting pipe that is connected to the dust collector at one end. The fan inlet is connected to an extraction pipe that is connected to the filter chamber. The extraction pipe is equipped with a first solenoid valve and a fresh air duct. The connecting pipe is equipped with a third solenoid valve and a cleaning pipe. The blast furnace flue gas outlet is connected to a flue gas output pipe that is connected to the filter chamber at one end. The fresh air duct is equipped with a fourth solenoid valve. The cleaning pipe is equipped with a fifth solenoid valve. The exhaust pipe is equipped with a sixth solenoid valve. The flue gas output pipe is equipped with a second solenoid valve.

[0008] Furthermore, the filtration mechanism includes two fixed slots, which are located inside the filtration chamber. A filter plate for filtering coal gas dust is inserted into the fixed slot.

[0009] Furthermore, the exhaust pipe and flue gas outlet pipe are located below the filter plate, while the extraction pipe and cleaning pipe are located above the filter plate.

[0010] Furthermore, the fresh air duct is located above the first solenoid valve, and the cleaning duct is located in front of the third solenoid valve.

[0011] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0012] This gas dust removal device for blast furnaces, through the setting of a transfer mechanism, allows the gas generated in the blast furnace to enter the dust collector after being pre-filtered by the filtration mechanism when the transfer mechanism is operating normally, thereby reducing the dust content of the gas and improving the efficiency and effectiveness of the dust collector. When the blast furnace stops operating, the transfer mechanism introduces external air to clean the filtration mechanism, thereby avoiding the tediousness of manual cleaning and improving the efficiency of gas transportation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model;

[0015] Figure 3 This utility model Figure 1 Enlarged view of point A in the middle.

[0016] In the diagram: 1. Blast furnace; 2. Flue gas outlet pipe; 3. Dust collector; 4. Filter chamber; 5. Fixing trough; 6. Filter plate; 7. Fan; 8. Extraction pipe; 9. First solenoid valve; 10. Second solenoid valve; 11. Connecting pipe; 12. Third solenoid valve; 13. Fresh air duct; 14. Fourth solenoid valve; 15. Cleaning pipe; 16. Fifth solenoid valve; 17. Discharge pipe; 18. Sixth solenoid valve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 In this embodiment, a gas dust removal device for a blast furnace includes a blast furnace 1 and a dust collector 3. A transfer mechanism is provided between the blast furnace 1 and the dust collector 3, and the transfer mechanism is equipped with a filtration mechanism.

[0019] In this embodiment, the transfer mechanism includes a filter chamber 4, which is located between the blast furnace 1 and the dust collector 3. The filter chamber 4 is equipped with a fan 7 and an exhaust pipe 17. The outlet of the fan 7 is connected to a connecting pipe 11, one end of which is connected to the dust collector 3. The inlet of the fan 7 is connected to an extraction pipe 8, which is connected to the filter chamber 4. The extraction pipe 8 is equipped with a first solenoid valve 9 and a fresh air pipe 13. The connecting pipe 11 is equipped with a third solenoid valve 12 and a cleaning pipe 15. The flue gas outlet of the blast furnace 1 is connected to a flue gas output pipe 2, one end of which is connected to the filter chamber 4. The fresh air pipe 13 is equipped with a fourth solenoid valve 14. The cleaning pipe 15 is equipped with a fifth solenoid valve 16. The exhaust pipe 17 is equipped with a sixth solenoid valve 18. The flue gas output pipe 2 is equipped with a second solenoid valve 10. The exhaust pipe 17 and the flue gas output pipe 2 are located below the filter plate 6. The extraction pipe 8 and the cleaning pipe 15 are located above the filter plate 6. The fresh air pipe 13 is located above the first solenoid valve 9. The cleaning pipe 15 is located in front of the third solenoid valve 12.

[0020] It should be noted that the discharge pipe 17 can be connected to the dust collector bag to collect dust, and a bucket can also be placed below it to collect the dust.

[0021] Specifically, when blast furnace 1 stops operating, the second solenoid valve 10, the first solenoid valve 9 and the third solenoid valve 12 are closed, and the fourth solenoid valve 14, the fifth solenoid valve 16 and the sixth solenoid valve 18 are opened, so that the blower 7 draws in external air through the fresh air pipe 13 and transports it to the top of the filter mechanism through the fifth solenoid valve 16, so that the dust filtering the coal gas at the bottom can be blown off and discharged into the filter chamber 4 through the discharge pipe 17.

[0022] In this embodiment, the filtration mechanism includes two fixed slots 5, which are located inside the filter chamber 4. A filter plate 6 for filtering coal gas dust is inserted into the fixed slot 5.

[0023] Specifically, when blast furnace 1 is in operation, the second solenoid valve 10, the first solenoid valve 9 and the third solenoid valve 12 are opened, and the fourth solenoid valve 14, the fifth solenoid valve 16 and the sixth solenoid valve 18 are closed. The gas enters the filter chamber 4 through the flue gas output pipe 2 and is partially intercepted by the filter plate 6, causing it to adhere to the bottom of the filter plate 6. Then, the filtered gas enters the dust collector 3 through the connecting pipe 11 for further dust removal.

[0024] The filter chamber 4 is equipped with a maintenance door, which allows the filter plate 6 to be replaced from the fixing slot 5 after a certain period of use.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas dust removal device for a blast furnace, comprising a blast furnace (1) and a dust collector (3), characterized in that, A transfer mechanism is provided between the blast furnace (1) and the dust collector (3), and the transfer mechanism is equipped with a filtration mechanism; The transfer mechanism includes a filter chamber (4), which is located between the blast furnace (1) and the dust collector (3). The filter chamber (4) is equipped with a fan (7) and an exhaust pipe (17). The outlet of the fan (7) is connected to a connecting pipe (11) that is connected to the dust collector (3) at one end. The inlet of the fan (7) is connected to an extraction pipe (8) that is connected to the filter chamber (4). The extraction pipe (8) is equipped with a first solenoid valve (9) and a fresh air pipe (13). The connecting pipe (11) is equipped with a third solenoid valve (12) and a cleaning pipe (15). The flue gas outlet of the blast furnace (1) is connected to a flue gas output pipe (2) that is connected to the filter chamber (4) at one end. The fresh air pipe (13) is equipped with a fourth solenoid valve (14). The cleaning pipe (15) is equipped with a fifth solenoid valve (16). The exhaust pipe (17) is equipped with a sixth solenoid valve (18). The flue gas output pipe (2) is equipped with a second solenoid valve (10).

2. The gas dust removal device for a blast furnace according to claim 1, characterized in that: The filtration mechanism includes a fixed groove (5), there are two fixed grooves (5), and they are set inside the filter chamber (4). A filter plate (6) for filtering coal gas dust is inserted inside the fixed groove (5).

3. A gas dust removal device for a blast furnace according to claim 2, characterized in that: The discharge pipe (17) and flue gas output pipe (2) are located below the filter plate (6), and the extraction pipe (8) and cleaning pipe (15) are located above the filter plate (6).

4. A gas dust removal device for a blast furnace according to claim 1, characterized in that: The fresh air duct (13) is located above the first solenoid valve (9), and the cleaning duct (15) is located in front of the third solenoid valve (12).

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