CN221649220U - Stokehold dust removal flue gas cover - Google Patents

Abstract

The utility model discloses a pre-furnace dust removal smoke hood, comprising a negative pressure pipe, a hood body, a fan, and an air-cooled wall. The negative pressure pipe is connected to the top of the hood body, and the air-cooled wall is placed inside the hood body; the air-cooled wall comprises two main pipes, a plurality of branch pipes are connected between the two main pipes, fins are fixed between two adjacent branch pipes, and through holes are provided on the fins; the branch pipes penetrate the side wall of the hood body, and the two main pipes are placed outside the hood body. An inlet is provided at any end of one main pipe, and an outlet is provided at any end of the other main pipe, and the fan outlet is connected to the inlet. Advantages: The device passes cooling air through the air-cooled wall, and the smoke contacts and exchanges heat with the branch pipes and fins of the air-cooled wall over a large area, thereby enhancing the cooling effect and preventing the smoke from directly contacting the cooling air. The cooling air will not affect the direction of the high-temperature smoke, and the hood body is prevented from being easily damaged locally.

Description

A kind of dust removal fume hood in front of furnace

Technical field:

The utility model relates to the field of clean alloy production, in particular to a furnace front dust removal fume hood.

Background technology:

After the ferrochrome alloy is produced by the ore-fired furnace, the remaining slag is discharged from the slag outlet at the bottom of the furnace along the chute. Due to the high temperature of the slag, a large amount of high-temperature flue gas is generated during the discharge. For environmental protection reasons, a high-temperature flue gas hood is usually set above the slag outlet and connected to a negative pressure pipe to remove the flue gas. However, after long-term use, the high-temperature flue gas can easily cause the inner wall of the high-temperature flue gas hood, especially the top, to be deformed and damaged by heat radiation, and a cold medium cooling treatment is required. Since water and slag will react violently in contact, water circulation cooling cannot be used to avoid damage and dripping causing water contact. Therefore, air cooling is selected, but the existing structure is simple, which is to directly pass the wind horizontal side wall into the high-temperature flue gas hood. As the flue gas is discharged from the negative pressure pipe, the high-temperature flue gas is biased and unstable during the process. Part of the flue gas rushes to the inner wall on the other side, which will also cause the inner wall of one side of the high-temperature flue gas hood to be in contact with the flue gas for a long time, causing local damage.

Utility model content:

The utility model aims to provide a furnace dust removal fume hood.

The utility model is implemented by the following technical solutions:

A furnace dust removal fume hood, comprising a negative pressure pipe, a hood body, a fan, and an air cooling wall, wherein the negative pressure pipe is connected to the top of the hood body, and the air cooling wall is placed inside the hood body;

The air-cooled wall includes two main pipes, a plurality of branch pipes are connected between the two main pipes, a fin is fixed between two adjacent branch pipes, and the fin is provided with a through hole;

The branch pipes penetrate the side wall of the cover body, the two main pipes are placed outside the cover body, an inlet is provided at any end of one of the main pipes, an outlet is provided at any end of the other main pipe, and the fan outlet is connected to the inlet.

Preferably, the inner wall of the cover is paved with rock wool bricks.

Preferably, there are two air-cooled walls forming a triangle, and the main pipes adjacent to the two air-cooled walls are connected.

Advantages of the utility model: the device passes cooling air through the air-cooled wall, and the flue gas contacts with the air-cooled wall branch pipes and fins over a large area for heat exchange, thereby enhancing the cooling effect and preventing the flue gas from directly contacting the cooling air. The cooling air will not affect the direction of the high-temperature flue gas, thereby preventing the hood from being easily damaged locally.

Description of the drawings:

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the overall structure of the utility model;

FIG2 is a schematic diagram of an air-cooled wall structure;

FIG3 is a schematic diagram of two air-cooled walls in FIG1 ;

FIG. 4 is a schematic diagram of two air-cooled wall structures.

In the figure: negative pressure pipe 1, cover body 2, fan 3, air-cooled wall 4, rock wool brick 5, main pipe 6, branch pipe 7, fin 8, through hole 9, inlet 10, outlet 11.

Specific implementation method:

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

As shown in Figures 1, 2, 3 and 4, a furnace dust removal fume hood includes a negative pressure pipe, a hood body, a fan, and an air-cooled wall. The negative pressure pipe is connected to the top of the hood body, and the air-cooled wall is placed in the hood body. The negative pressure pipe extracts the fume rising from the slag discharge port below the hood body. The inner wall of the hood is paved with rock wool bricks, which are used for heat insulation to reduce the impact of heat radiation on the hood body.

The air-cooled wall includes two main pipes, a plurality of branch pipes are connected between the two main pipes, fins are fixed between two adjacent branch pipes, and through holes are provided on the fins, and the through holes are used to allow the smoke to pass through the air-cooled wall;

The branch pipes penetrate the side wall of the cover body, and the two main pipes are placed outside the cover body. An inlet is provided at any end of one main pipe, and an outlet is provided at any end of the other main pipe. The fan outlet is connected to the inlet. The fan outlet blows cooling air from the inlet into one main pipe, and the cooling air is blown out from the outlet of the other main pipe through the branch pipes to cool the branch pipes and fins. The flue gas passing through the through holes exchanges heat with the branch pipes and fins for cooling. The contact area between the branch pipes, fins and flue gas is large, and the cooling effect is strong.

There are two air-cooled walls forming a triangle, and the adjacent main pipes of the two air-cooled walls are connected. This design can increase the number of branch pipes and fins and improve the cooling effect.

Working principle: When the utility model is in use, the negative pressure pipe draws away the flue gas rising from the slag discharge port under the cover body, the flue gas passes through the through holes on the fins, and the fan outlet blows the cooling air from the inlet into a main pipe, and the cooling air passes through the branch pipe and blows out from the outlet of another main pipe to cool the branch pipe and the fins, and the flue gas passing through the through holes exchanges heat with the branch pipe and the fins for cooling.

The device passes cooling air through the air-cooled wall, and the flue gas contacts and exchanges heat with the air-cooled wall branch pipes and fins over a large area, thereby enhancing the cooling effect and preventing the flue gas from directly contacting the cooling air. The cooling air will not affect the direction of the high-temperature flue gas, thereby preventing the hood from being easily damaged locally.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. The furnace front dust-removing flue gas hood is characterized by comprising a negative pressure pipe, a hood body, a fan and an air cooling wall, wherein the negative pressure pipe is communicated with the top end of the hood body, and the air cooling wall is arranged in the hood body;

The air cooling wall comprises two main pipes, a plurality of branch pipes are communicated between the two main pipes, fins are fixed between two adjacent branch pipes, and through holes are formed in the fins;

The branch pipes penetrate through the side wall of the cover body, the two main pipes are arranged outside the cover body, any one end of one main pipe is provided with an inlet, any one end of the other main pipe is provided with an outlet, and the air outlet of the fan is connected with the inlet.

2. A stokehold dust removal fume hood as set forth in claim 1, wherein: rock wool bricks are paved on the inner wall of the cover body.

3. A stokehold dust removal fume hood as set forth in claim 2, wherein: the two air cooling walls are triangular, and the adjacent main pipes of the two air cooling walls are communicated.