WO2021136010A1

WO2021136010A1 - Furnace top diffused gas dust removal device during blowing-down and reblowing of blast furnace

Info

Publication number: WO2021136010A1
Application number: PCT/CN2020/138293
Authority: WO
Inventors: 王文聪
Original assignee: 中冶南方工程技术有限公司
Priority date: 2019-12-31
Filing date: 2020-12-22
Publication date: 2021-07-08
Also published as: CN211420209U

Abstract

A furnace top diffused gas dust removal device during blowing-down and reblowing of a blast furnace. The dust removal device comprises a gas diffusion pipe (1) and a dust remover (3). One end of the gas diffusion pipe (1) is communicated with ascending pipes (7) and a descending pipe (8) of a blast furnace (11), and the other end is connected to an inlet end of the dust remover (3) by means of a gas cut-off valve (2); an outlet end of the dust remover (3) is provided with at least one gas diffusion value (4). The device is simple in structure and convenient in operation; the dust remover (3) is mounted at the top of the ascending pipes (7) of the blast furnace, so that furnace top diffused gas is purified by the dust remover (3) and then discharged during blowing-down and reblowing of the blast furnace, pollution of dust to the environment can be greatly reduced, an original blast furnace operation mode is unchanged, and the improvement cost is low.

Description

Dust removal device for dispersing gas from top of blast furnace with rest air stove

Technical field

The utility model belongs to the technical field of the metallurgical industry, and specifically relates to a blast furnace rest blast stove top discharge gas dust removal device.

Background technique

In order to ensure the stable and smooth production process of the blast furnace, it is generally necessary to conduct regular (about 3 months) maintenance on the blast furnace. Because the blast furnace top relief valve is not currently installed, a large amount of dust in the blast furnace gas is directly discharged into the atmosphere with the blast furnace gas during the blast furnace closing and rewinding process, forming billowing black smoke, which causes great pollution to the environment.

Therefore, how to effectively reduce the emission of gas dust and eliminate the "black smoke" phenomenon in the process of blast furnace shutdown and recovery has become an urgent issue to be solved.

Utility model content

The purpose of the utility model is to provide a de-gassing dust removal device, which is especially suitable for de-gassing dust in the process of blast furnace rest and rewind, and reduces the emission of degassed gas dust from the blast furnace rest wind.

To this end, the utility model provides a blast furnace rest blast stove top blast gas dust removal device, including a gas vent pipe and a dust collector. One end of the gas vent pipe is connected with the rising pipe and the down pipe of the blast furnace, and the other end is cut off by the gas The valve is connected with the inlet end of the dust collector, and at least one gas release valve is arranged at the outlet end of the dust collector.

Further, the blast furnace has several risers, and several risers and downcomers meet at one place, and the gas venting pipes are installed at the intersection of the risers and downcomers.

Further, an ash discharge pipe is connected to the bottom of the dust collector, an ash discharge valve is arranged on the ash discharge pipe, and an ash collection hopper is connected to the end of the ash discharge pipe.

Further, the bottom of the dust collector is connected with an ash discharge pipe, the ash discharge pipe is provided with an ash discharge valve, the blast furnace is provided with a material tank, and the end of the ash discharge pipe is in communication with the material tank.

Further, the dust collector is a bag filter or a metal filter dust collector.

Further, the gas release valve is hydraulically driven, and its size and quantity are adapted to the volume of the blast furnace.

Compared with the prior art, the beneficial effects of the utility model:

The utility model provides the blast furnace rest blast stove top blast gas dust removal device with simple structure and convenient operation. By installing a dust collector on the top of the blast furnace riser pipe, the blast furnace top blast gas is purified by the dust collector during the blast furnace rest blast process Discharging later can greatly reduce the dust pollution to the environment, and the original blast furnace operation mode remains unchanged, and the transformation cost is low.

Hereinafter, the utility model will be further described in detail with reference to the accompanying drawings.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the utility model of the blast furnace rest blast stove top venting gas dust removal device.

Description of reference signs: 1. Gas discharge pipe; 2. Gas shut-off valve; 3. Dust collector; 4. Gas discharge valve; 5. Ash discharge valve; 6. Ash discharge pipe; 7. Ascending pipe; 8. Downcomer; 9. Ash hopper; 10. Material tank; 11. Blast furnace.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" , "Top", "Bottom", "Inner", "Outer" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating It may also imply that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features; in the description of the present invention, unless otherwise specified, “multiple” and “ "Several" means two or more.

As shown in Figure 1, this embodiment provides a blast furnace rest air stove top gas dedusting device, including a gas venting pipe 1 and a dust collector 3, the gas venting pipe 1 one end and the blast furnace 11 riser pipe 7 and down The pipe 8 is in communication, and the other end is connected to the inlet end of the dust collector 3 through a gas shut-off valve 2, and at least one gas release valve 4 is provided at the outlet end of the dust collector 3. In this embodiment, a gas venting pipe 1 is used to connect the rising pipe 7 of the blast furnace 11 to the dust collector 3, so that the top blast furnace 11 gas is purified by the dust collector 3 and then discharged, so as to achieve dust removal of the blast furnace blast gas. The purpose is to greatly reduce the pollution of dust to the environment.

The use method of the blast furnace rest air stove top dispersing gas dust removal device is as follows:

When the blast furnace 11 is out of air, open the gas shut-off valve 2 installed in front of the inlet of the dust collector 3, and reduce the top pressure of the blast furnace to a certain value (for example, no more than 30kPa) by reducing the wind and pressure. At this time, open the gas release valve on the top of the dust collector 3. 4 Perform venting; when the blast furnace 11 rewinds, open the gas shut-off valve 2 installed in front of the inlet of the dust collector 3 and the gas release valve 4 on the top of the dust collector 3. The gas released from the top of the furnace is filtered by the dust collector 3 and discharged by the gas release valve 4. Into the atmosphere, after the blast furnace gas has passed the inspection, close the gas release valve 4 on the top of the dust collector 3, and start to recover the blast furnace gas.

There are several riser pipes 7 of the blast furnace 11, and the gas vent pipe 1 is installed at the top of the intersection of the riser pipe 7 and the down pipe 8, and the blast furnace rest air vent gas is introduced by the gas vent pipe 1 and the gas vent valve 2. Dust is removed in the dust collector 3. The dust collector 3 can adopt, but is not limited to, a bag filter, a metal filter dust collector, etc., which has high dust removal efficiency, stable operation, and is not affected by fluctuations in the amount of vented gas, and is especially suitable for blast furnace blast furnace top venting conditions. The gas release valve 4 is hydraulically driven, and its specifications and numbers can be adaptively selected according to the volume of the blast furnace 11.

In addition, for the dust trapped in the dust collector 3 after the release, an embodiment may be connected with an ash discharge pipe 6 at the bottom of the dust collector 3, and an ash discharge valve 5 is provided on the ash discharge pipe 6. The end of the ash discharge pipe 6 is externally connected to the ash collection hopper 9; in another embodiment, a material tank 10 is provided on the blast furnace 11, and the end of the ash discharge pipe 6 can also be connected to the material tank 10. After the blast furnace 11 recovery process is completed, close the gas shut-off valve 2 installed in front of the inlet of the dust collector 3. The dust in the blast furnace gas is collected by the dust collector 3 and then falls on the bottom of the dust collector 3, and the ash discharge pipe 6 is opened The ash discharge valve 5, the dust collected in the dust collector 3 is discharged into the ash collection hopper 9 through the ash discharge pipe 6, or directly discharged into the material tank 10 and returned to the blast furnace production unit for smelting, so as to realize dust recovery without causing environmental damage. Pollution.

To sum up, the utility model provides the blast furnace rest air stove top gas dispersing dust removal device with simple structure and convenient operation. By installing a dust collector on the top of the blast furnace riser pipe, the blast furnace top discharging gas during the blast furnace rest air process All are discharged after being purified by a dust collector, which can greatly reduce the pollution of dust to the environment, and the original blast furnace operation mode remains unchanged, and the transformation cost is low.

The above examples are merely illustrative of the present utility model, and do not constitute a limitation on the protection scope of the utility model. Any design identical or similar to the utility model falls within the protection scope of the utility model.

Claims

A blast furnace rest blast stove top venting gas dust removal device, which is characterized in that it comprises a gas venting pipe and a dust remover. One end of the gas venting pipe is connected with the rising pipe and the down pipe of the blast furnace, and the other end is connected to the dust remover through a gas shut-off valve The inlet end of the dust collector is connected, and the outlet end of the dust collector is provided with at least one gas release valve.
As claimed in claim 1, a blast furnace rest blast stove top blasting gas dust removal device, characterized in that: the blast furnace has a plurality of risers, and a plurality of risers and downcomers meet at one place, and the gas is released The pipe is installed at the intersection of the rising pipe and the down pipe.
The blast furnace rest blast stove top discharge gas dust removal device according to claim 1, characterized in that: the bottom of the dust remover is connected with an ash discharge pipe, and the ash discharge pipe is provided with an ash discharge valve, and the ash discharge pipe The end of the ash collection hopper is connected.
The blast furnace rest blast stove top discharge gas dust removal device according to claim 1, characterized in that: the bottom of the dust remover is connected with an ash discharge pipe, the ash discharge pipe is provided with an ash discharge valve, and the blast furnace is installed There is a material tank, and the end of the ash discharge pipe is communicated with the material tank.
The blast furnace rest blast stove top venting gas dust removal device according to claim 1, wherein the dust remover is a bag dust remover or a metal filter dust remover.
The blast furnace rest blast stove top venting gas dust removal device according to claim 1, wherein the gas vent valve is hydraulically driven, and its size and quantity are adapted to the volume of the blast furnace.