CN205274759U - A dust discharging device for dust remover - Google Patents

Abstract

The utility model discloses an ash unloading device for a dust collector, which comprises at least one set of ash unloading valve groups arranged between the ash bin of the dust collector and a spiral dust cleaning machine, and the ash unloading valve group includes a top-down ash unloading valve group. Three ball valves arranged in sequence, one of which is a hemispherical valve used to control flow, the hemispherical body of the hemispherical valve is provided with a through hole, when the spherical surface of the hemispherical body faces the direction of the ash inlet, the through hole It is arranged parallel to and communicated with the ash inlet. The utility model has the advantages of convenient operation, long service life and no influence on production efficiency.

Description

A dust unloading device for a dust collector

technical field

The utility model specifically relates to an ash unloading device for a dust collector, which can be applied to a blast furnace ironmaking dust removal system.

Background technique

Blast furnace gas is one of the important by-products in the blast furnace ironmaking process. The blast furnace gas discharged from the top of the furnace not only has a high calorific value, but also contains a large amount of dust (about 20-30kg/t iron). The dusty gas needs to be dedusted and purified by gravity dust collector, cyclone dust collector, dry bag filter or washing tower before it can be used; and the dust accumulated in the dust collector needs to be discharged by a special ash discharge device. To vehicles, trains, tank trucks or ash pipelines and other transportation tools, and then transported to the corresponding place for recycling.

At present, many domestic ash unloading devices used for gravity dust collectors, cyclone dust collectors, etc. are composed of ash unloading valve groups plus spiral dust cleaning machines or pneumatic conveying equipment. The ash effect requires that the flow rate of the dust removal ash entering the soot cleaning machine should not be too large and the flow can be adjusted, which requires frequent adjustment of the opening of the ash discharge valve connected to the soot cleaning machine to meet the small ash discharge capacity, and this This way of use will cause the ash discharge valve used to adjust the flow to be severely washed by high-pressure dust, and the valve will soon be worn out and scrapped. In order to solve the problem of frequent wear and replacement of the ash unloading valve that regulates the flow rate, some iron works use a wear-resistant flow limiting tube instead of the flow regulating valve. A spool (orifice plate) for controlling the flow rate is installed in the flow limiting tube. Replacement of the spool is easy to operate, low in cost and long in service life. However, due to the fact that the ash bin of the dust collector is often prone to accumulate large lumps of material due to reasons such as falling off of the lining and dust compaction, blockage occurs, and the inner diameter of the flow limiting tube is too small to discharge these large lumps of material. Manhole cleaning in the cone section of the dust collector. However, every time the manhole is opened to clean up the bulk material, the blast furnace needs to be shut down, which not only affects the production, but also often occurs that the bulk material is not cleaned in time.

Utility model content

The technical problem to be solved by the utility model is to provide a dust unloading device for a dust collector, which is easy to operate, has a long service life and does not affect production efficiency.

The technical scheme that the utility model solves its technical problem adopts is:

A kind of ash unloading device for a dust collector is provided, the device includes at least one set of ash unloading valve groups arranged between the ash bin of the dust collector and the screw cleaning machine, and the ash unloading valve sets include sequentially arranged from top to bottom There are three ball valves, one of which is a hemispherical valve used to control flow, and a through hole is opened on the hemispherical body of the hemispherical valve. When the spherical surface of the hemispherical body faces the direction of the ash inlet, the through hole and The ash inlets are arranged in parallel and connected.

According to the above technical solution, the diameter of the through hole is 40-100 mm.

According to the above technical solution, the three ball valves of the ash unloading valve group are the hemispherical valves for controlling maintenance, the hemispherical valves for controlling cut-off, and the hemispherical valves for flow control from top to bottom; or the ash unloading The three ball valves of the valve group are the hemispherical valve used to control cut-off, the global valve used to control the sealing, and the hemispherical valve used to control the flow from top to bottom; or the three ball valves of the ash unloading valve group are from top to bottom. The lower ones are the hemispherical valves used to control the flow, the hemispherical valves used to control the maintenance, and the hemispherical valves used to control the cut-off; Ball valves, semi-spherical valves for controlled cut-off, global valves for controlled sealing.

According to the above-mentioned technical solution, the device includes two sets of ash unloading valve sets arranged side by side.

According to the above technical solution, the ash unloading valve group is sequentially connected with the spiral ash cleaning machine through a corrugated compensator and a short pipe.

According to the above technical solution, the adjacent ball valves, and the hemispherical valve and the corrugated compensator are fixedly connected by bolts.

According to the above technical solution, both ends of the short pipe are fixedly connected to the corrugated compensator and the screw cleaning machine through flanges.

The utility model has the following beneficial effects: the device designs the lowermost ball valve as a hemispherical valve that can be used to control the flow rate, specifically opening a through hole on the hemispherical body. During normal production, the first ball valve is in a normally open state. It will only be closed when the equipment below it is overhauled and replaced. The second ball valve is used as the opening and closing switch when the dust collector is discharging dust. The through holes on the hemisphere are evenly and vertically unloading, which can not only ensure a suitable ash flow rate for the subsequent spiral ash cleaning equipment, but also avoid the ball valve body being quickly worn out because the ash unloading ball valve is only opened about 10% to 15%. In addition, the hemispherical valve used to control the flow is used in the closed state for a long time, which avoids the wear of the sealing surface caused by frequent opening, and greatly prolongs the service life; When there is a blockage and needs to be cleaned, the hemispherical valve used to control the flow is adjusted to the fully open state, and the bulk material can be discharged along the diameter of the hemispherical valve. The utility model has the advantages of simple structure, convenient operation, controllable ash unloading flow rate, convenient removal of bulky materials in the ash chamber, small valve wear, convenient maintenance and long service life.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is a schematic structural view of the lowermost ball valve in the utility model.

Among them: 1—ash bin of dust collector; 2—ball valve; 3—ball valve; 4—ball valve; 4.1—hemisphere; 4.2—through hole; 5—corrugated compensator; 6—short pipe;

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

In a preferred embodiment of the present utility model, as shown in Fig. 1 and Fig. 2, a dust unloading device for a dust collector includes at least one set of ash bins 1 and a spiral dust cleaning machine 7 arranged on the dust collector. Between the ash unloading valve group, the ash unloading valve group includes three ball valves (2, 3, 4) arranged sequentially from top to bottom, of which one ball valve 4 is a hemispherical valve used to control the flow, and the hemispherical body of the hemispherical valve 4.1 A through hole 4.2 is opened on the top, and when the spherical surface of the hemisphere 4.1 faces the direction of the ash inlet, the through hole 4.2 is arranged in parallel with the ash inlet and communicates with it.

In a preferred embodiment of the present utility model, as shown in FIG. 2 , the diameter of the through hole 4.2 is 40-100 mm. In a preferred embodiment of the present utility model, as shown in FIG. 1 , the device includes two groups of ash discharge valves arranged side by side.

In a preferred embodiment of the present utility model, as shown in FIG. 1 , the ash unloading valve group is connected to the spiral ash cleaning machine 7 sequentially through a corrugated compensator 5 and a short pipe 6 .

In a preferred embodiment of the present utility model, as shown in FIG. 1 , the adjacent ball valves, and the hemispherical valve and the corrugated compensator are fixedly connected by bolts.

In a preferred embodiment of the present utility model, as shown in FIG. 1 , both ends of the short pipe 6 are fixedly connected to the corrugated compensator 5 and the screw cleaning machine 7 through flanges.

In a preferred embodiment of the present utility model, the three ball valves of the ash unloading valve group are hemispherical valves for controlling maintenance, hemispherical valves for controlling cutoff, and hemispherical valves for flow control from top to bottom; The three ball valves of the ash valve group are, from top to bottom, the hemispherical valve for controlling cut-off, the global valve for controlling sealing, and the hemispherical valve for controlling flow; or the three ball valves of the ash unloading valve group are from top to bottom The sequence is the hemispherical valve used to control the flow, the hemispherical valve used to control the maintenance, and the hemispherical valve used to control the cut-off; Hemispherical valves for controlling cut-off and global valves for controlling sealing.

Taking the first case as an example, the three ball valves of the ash unloading valve group are, from top to bottom, ball valve 2 for control and maintenance, ball valve 3 for control cut-off, and ball valve 4 for flow control. During production, the ball valve 2 is in the normally open state, only when the ball valve below it needs to be repaired and replaced, for example, the ball valve 3 used to control the cut-off is easy to wear due to frequent opening, when the ball valve 3 needs to be replaced, or the equipment connected to its lower part needs to be repaired , then close the ball valve 2 used for maintenance to isolate dust and gas. After the maintenance and replacement, the ball valve 2 is adjusted to the normally open state. When the gas ash in the ash bin of the dust collector reaches a certain limit and needs to be discharged, the ball valve 3 is opened, and after the ash discharge is completed, the ball valve 3 is closed. The ball valve 4 has a round hole of Φ60mm in the center of the hemisphere. During normal production, the ball valve 4 is in a closed state, and the dust is discharged evenly and vertically through the round hole. When there are large pieces of material accumulated in the dust bin of the dust collector, blockage occurs If the ash discharge is not smooth and needs to be cleaned, adjust the ball valve 4 to the fully open state, and the large material can be discharged along the diameter of the ball valve 4. After the large material is cleaned, the ball valve 4 is adjusted to the closed state for use. Whenever the dedusting of the dust collector is completed, the ball valve 4 can also be opened and closed once to clean up the possible bulk materials to avoid the blockage of the round hole of the ball valve 4 for ash discharge. The diameter of the three ball valves can be DN200, DN250, DN300, DN350 or DN400, etc., and the driving mode of the valve can be hydraulic, electric or pneumatic.

The valve combination of the utility model is flexible and changeable, and the ash unloading valve group used can be 1 group, 2 groups or 3 groups, which are determined according to the size of the corresponding blast furnace capacity. The utility model is used for dust-free discharge of gas ash in a blast furnace ironmaking dust removal system.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present utility model.

Claims (7)

1. A kind of ash unloading device for dust collector, this device comprises at least one set of ash unloading valve group that is arranged between dust collector ash bin and spiral soot cleaning machine, it is characterized in that, described ash unloading valve group includes from Three ball valves arranged in sequence from top to bottom, one of which is a hemispherical valve used to control the flow, and a through hole is opened on the hemispherical body of the hemispherical valve, when the spherical surface of the hemispherical body faces the direction of the ash inlet, The through hole is arranged parallel to and communicated with the ash inlet. 2 . The device according to claim 1 , wherein the diameter of the through hole is 40-100 mm. 3. The device according to claim 1, characterized in that, the three ball valves of the ash unloading valve group are sequentially from top to bottom a hemispherical valve for controlling maintenance, a hemispherical valve for controlling cut-off, and a hemispherical valve for controlling flow rate hemispherical valve; or the three ball valves of the ash unloading valve group from top to bottom are the hemispherical valve for controlling cut-off, the global valve for controlling sealing, and the hemispherical valve for controlling flow; or the ash unloading valve group The three ball valves of the ash valve group are the hemispherical valve used to control flow, the hemispherical valve used to control maintenance, and the hemispherical valve used to control cut-off from top to bottom; or the three ball valves of the ash unloading valve group are from the top From the bottom to the bottom, there are hemispherical valves used to control flow, hemispherical valves used to control cut-off, and global valves used to control sealing. 4. The device according to claim 1, characterized in that the device comprises two groups of ash discharge valves arranged side by side. 5. The device according to claim 1, characterized in that, the ash unloading valve group is sequentially connected to the spiral ash cleaning machine through a corrugated compensator and a short pipe. 6. The device according to claim 5, characterized in that, the adjacent ball valves, and the hemispherical valve and the corrugated compensator are fixedly connected by bolts. 7. The device according to claim 5, characterized in that both ends of the short pipe are fixedly connected to the corrugated compensator and the spiral cleaning machine through flanges.