Blast furnace dust removal device

Abstract

The utility model relates to the technical field of blast furnace dust removal, in particular to a blast furnace dust removal device which comprises a dust removal box, one side of the bottom of the dust removal box is connected with an air inlet pipe, one side of the top of the dust removal box is connected with an exhaust pipe, and a dust blocking assembly, a filter screen and a spraying mechanism are sequentially arranged in the dust removal box from bottom to top. The dust blocking assembly comprises a plurality of lightning type dust blocking plates which are arranged side by side, the lightning type dust blocking plates are fixedly connected to the inner side wall of the dust removal box, a waste collecting box is installed at the bottom of the dust removal box, a liquid discharging pipe is connected to the bottom of the waste collecting box, and an on-off valve is arranged on the liquid discharging pipe; when being used for cleaning dust, the blast furnace flue gas can be dedusted, and the dust removal box does not need to be closed.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace dust removal, and more specifically to a blast furnace dust removal device. Background Art

[0002] A blast furnace is an iron-making device. A large amount of smoke ash is produced during the iron-making process. If the smoke ash is directly discharged, it will pollute the environment. Therefore, when the blast furnace discharges smoke ash, the dust in the smoke ash is generally filtered out through a dust removal device first.

[0003] The existing Chinese invention patent with announcement number CN114534387A discloses a blast furnace flue gas dust removal device, including a dust removal box, an exhaust box and a blast furnace dust removal part, the blast furnace dust removal part includes a first positioning plate, multiple cloth bags, multiple blowing pipes, a first air supply duct, multiple third connecting rods and multiple gear assemblies, the first positioning plate is provided with multiple first ventilation holes, each cloth bag is arranged at the lower end of a first ventilation hole, the third connecting rod can be rotated to be connected with the blowing pipe in a vertical plane; the multiple gear assemblies are configured to enable the third connecting rod to be rotated to be connected with the blowing pipe in a vertical plane.

[0004] This technical solution mainly filters the dust in the blast furnace flue gas through filter bags, and can also automatically clean the dust adhering to the filter bags to ensure the air permeability of the filter bags. The dust falling off the filter bags will fall into the ash hopper at the bottom of the dust removal box. When the dust in the ash hopper is full, it is necessary to open the ash hopper to discharge the dust. When opening the ash hopper, in order to avoid leakage of blast furnace flue gas, it is necessary to close the dust removal box first. This makes it impossible for the dust removal box to assist the blast furnace in dust removal during the dust cleaning process, which is more inconvenient. Utility Model Content

[0005] The utility model aims to provide a blast furnace dust removal device which can remove dust from blast furnace smoke when cleaning dust without closing a dust removal box.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A blast furnace dust removal device comprises a dust removal box, wherein one side of the bottom of the dust removal box is connected to an air inlet pipe, and one side of the top of the dust removal box is connected to an exhaust pipe. A dust shield assembly, a filter screen and a spray mechanism are sequentially arranged in the dust removal box from bottom to top. The dust shield assembly comprises a plurality of lightning-shaped dust shield plates arranged side by side, and the lightning-shaped dust shield plates are fixedly connected to the inner wall of the dust removal box. A waste collecting box is installed at the bottom of the dust removal box, and a drain pipe is connected to the bottom of the waste collecting box, and an on-off valve is arranged on the drain pipe.

[0008] Furthermore, the spray mechanism includes a spray plate arranged at the top of the inner side of the dust removal box, a cavity is opened in the spray plate, a plurality of spray heads connected to the cavity are installed at the bottom of the spray plate, and a liquid injection pipe is connected to the top of the spray plate.

[0009] Furthermore, a secondary dust shield is provided on the lightning-shaped dust shield.

[0010] Furthermore, the air intake pipe is a funnel-shaped structure, and the inner diameter of the air intake pipe increases as it is closer to the dust removal box.

[0011] Furthermore, a transparent observation window is provided on the waste collection box.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The blast furnace flue gas enters the dust removal box through the air inlet pipe. Gravity and lightning-shaped dust shields prevent the smoke in the air from continuing to rise. The smoke falls to the bottom of the dust removal box under the influence of gravity, and the air is further filtered through the filter. The spraying mechanism is used for spraying and dust removal. The sprayed water and dust are collected in the waste collection box, and the waste liquid is discharged through the drain pipe, thereby discharging the dust together. At the same time, the blast furnace flue gas can be dusted without closing the dust removal box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] 1. Dust removal box; 2. Air inlet pipe; 3. Exhaust pipe; 4. Filter; 5. Lightning-type dust shield; 51. Secondary dust shield; 6. Waste collection box; 7. Drain pipe; 8. On-off valve; 9. Spray plate; 10. Spray head; 11. Injection pipe. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, a blast furnace dust removal device includes a dust removal box 1, a bottom side of the dust removal box 1 is connected to an air inlet pipe 2, a top side of the dust removal box 1 is connected to an exhaust pipe 3, a dust shield assembly, a filter screen 4 and a spray mechanism are sequentially arranged in the dust removal box 1 from bottom to top, the dust shield assembly includes a plurality of lightning-shaped dust shield plates 5 arranged side by side, the lightning-shaped dust shield plates 5 are fixedly connected to the inner wall of the dust removal box 1, a waste collecting box 6 is installed at the bottom of the dust removal box 1, the bottom of the waste collecting box 6 is connected to a drain pipe 7, and the drain pipe 7 is provided with an on-off valve 8.

[0017] The spray mechanism includes a spray plate 9 arranged at the top of the inner side of the dust removal box 1, a cavity is opened in the spray plate 9, a plurality of spray heads 10 connected to the cavity are installed at the bottom of the spray plate 9, and an injection pipe 11 is connected to the top of the spray plate 9; the injection pipe 11 is connected to an external water source.

[0018] The lightning-shaped dust shield 5 is provided with a secondary dust shield 51 ; the secondary dust shield 51 is provided to further prevent dust in the air from moving upward.

[0019] The air intake pipe 2 is a funnel-shaped structure, and the inner diameter of the air intake pipe 2 becomes larger as it is closer to the dust removal box 1; the air intake pipe 2 is set to be funnel-shaped to reduce the flow rate of smoke and dust, and the dust in the smoke is more easily deposited under the action of gravity.

[0020] The waste collecting box 6 is provided with a transparent observation window; the transparent observation window is provided to facilitate observation of the waste liquid in the waste collecting box 6, firstly, to avoid excessive waste liquid in the waste collecting box 6, and secondly, to close the on-off valve 8 in time when the waste liquid is about to be discharged, so as to avoid leakage of blast furnace smoke from the drain pipe 7.

[0021] Working principle: blast furnace flue gas enters the dust removal box 1 through the air inlet pipe 2, and the lightning-shaped dust shield 5 and the secondary dust shield 51 prevent the smoke in the air from continuing to rise. The smoke falls to the bottom of the dust removal box 1 under the influence of gravity, and the air is further filtered through the filter 4. Liquid is sprayed through the spray head 10 to spray dust removal. The sprayed water and dust are collected in the waste collection box 6, and the waste liquid is discharged through the drain pipe 7, thereby discharging the dust together. At the same time, the blast furnace flue gas can be dusted without closing the dust removal box.

[0022] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A blast furnace dust removal device, characterized in that: The invention comprises a dust removal box (1), wherein one side of the bottom of the dust removal box (1) is connected to an air inlet pipe (2), and one side of the top of the dust removal box (1) is connected to an exhaust pipe (3). A dust shield assembly, a filter screen (4) and a spray mechanism are sequentially arranged in the dust removal box (1) from bottom to top. The dust shield assembly comprises a plurality of lightning-shaped dust shield plates (5) arranged side by side, and the lightning-shaped dust shield plates (5) are fixedly connected to the inner wall of the dust removal box (1). A waste collection box (6) is installed at the bottom of the dust removal box (1), and a drain pipe (7) is connected to the bottom of the waste collection box (6), and an on-off valve (8) is arranged on the drain pipe (7).

2. The blast furnace dust removal device according to claim 1, characterized in that: The spray mechanism comprises a spray plate (9) arranged at the top of the inner side of the dust removal box (1), a cavity is opened in the spray plate (9), a plurality of spray heads (10) connected to the cavity are installed at the bottom of the spray plate (9), and a liquid injection pipe (11) is connected to the top of the spray plate (9).

3. The blast furnace dust removal device according to claim 1, characterized in that: The lightning-shaped dust shield (5) is provided with a secondary dust shield (51).

4. The blast furnace dust removal device according to claim 1, characterized in that: The air intake pipe (2) is a funnel-shaped structure, and the inner diameter of the air intake pipe (2) increases as it is closer to the dust removal box (1).

5. The blast furnace dust removal device according to claim 1, characterized in that: The waste collection box (6) is provided with a transparent observation window.

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