CN211921608U

CN211921608U - Collecting device for removing coal powder from blockage of coal injection gun of blast furnace

Info

Publication number: CN211921608U
Application number: CN202020325469.3U
Authority: CN
Inventors: 李新会
Original assignee: Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-11-13
Anticipated expiration: 2030-03-16

Abstract

The utility model relates to a buggy collection device is got rid of in jam of blast furnace coal injection lance belongs to the technical field of blast furnace coal injection, and it includes the coal collector that is used for collecting the buggy, the coal collector top is connected to the coal distributor through the pipeline, be equipped with first branch pipeline on the pipeline and connect the blast furnace coal injection lance, be equipped with branch connection high-pressure nitrogen gas on the first branch pipeline, install ball valve one between blast furnace coal injection lance and the first branch pipeline crosspoint, install ball valve seven on the high-pressure nitrogen gas connected's branch pipeline, install ball valve six between coal distributor and the first branch pipeline, install quick-operation joint on the pipeline, install ball valve four between quick-operation joint and the first branch pipeline; the bottom of the coal collector is provided with a coal taking port. The utility model discloses have the effect of solving environmental pollution, energy waste.

Description

Collecting device for removing coal powder from blockage of coal injection gun of blast furnace

Technical Field

The utility model relates to a coal powder collecting device is got rid of in blockage of blast furnace coal injection coal rifle belongs to the technical field of blast furnace coal injection.

Background

The blast furnace coal injection mainly comprises a raw coal storage and transportation system, a coal powder preparation system, a coal powder conveying system, a coal powder injection system, a dry gas preparation system and a gas supply system, wherein coke is required for modern blast furnace smelting, and the coke has the function of providing heat required in the smelting process in a blast furnace; a reducing agent required for reducing iron ore; and a framework for maintaining the air permeability of the blast furnace material column (especially the reflow zone and the part below the reflow zone). The blast furnace blowing coal powder is pulverized anthracite powder or pulverized bituminous coal powder or mixed coal powder of the pulverized anthracite powder and the pulverized bituminous coal powder which are directly blown into the blast furnace from a blast furnace tuyere so as to replace coke and play a role in providing heat and reducing agent, thereby reducing the coke ratio and the pig iron cost, and being an important technical revolution of modern blast furnace smelting.

The existing blast furnace coal injection can cause the phenomenon of coal gun blockage and coal breakage due to various reasons, and is generally discharged to the air in the treatment process, so that a coal source is wasted, and the environment is seriously polluted and the air pollution is caused due to the fact that the granularity of pulverized coal is as fine as-200 meshes and reaches 75-85%.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a blockage of blast furnace coal injection coal gun gets rid of buggy collection device, has the effect of solving environmental pollution, energy waste.

In order to realize the purpose, the utility model discloses a technical scheme is:

the collecting device for removing the coal dust when the coal injection gun of the blast furnace is blocked comprises a coal collector for collecting the coal dust, wherein the top of the coal collector is connected to a coal distributor through a pipeline, a first branch pipeline is arranged on the pipeline and connected with the coal injection gun of the blast furnace, a branch is arranged on the first branch pipeline and connected with high-pressure nitrogen, a first ball valve is arranged between the coal injection gun of the blast furnace and the cross point of the first branch pipeline, a seventh ball valve is arranged on the branch pipeline connected with the high-pressure nitrogen, a sixth ball valve is arranged between the coal distributor and the first branch pipeline, a quick joint is arranged on the pipeline, and a fourth ball valve is arranged between the quick joint and the first branch pipeline; the bottom of the coal collector is provided with a coal taking port.

The utility model discloses technical scheme's further improvement lies in: and a steam pipe network is arranged on the coal collector at a height higher than the outlet of the pipeline, the steam pipe network is communicated with external steam through a steam pipe, and an eighth ball valve is arranged on the steam pipe.

The utility model discloses technical scheme's further improvement lies in: two first baffles and a second baffle which are inclined downwards are fixedly arranged at the opposite positions of the top of a steam pipe network in the coal collector, a gap is reserved between the first baffles and the second baffles, the length of the second baffle is larger than that of the first baffle, and the pipeline penetrates through the second baffle.

The utility model discloses technical scheme's further improvement lies in: a second branch pipeline is arranged between the ball valve six and the high-pressure nitrogen and connected to a branch pipeline connected with the high-pressure nitrogen on the first branch pipeline; the cross point of the second branch pipeline and the pipeline is provided with a third three-way valve, and the pipeline between the sixth three-way valve and the coal distributor is provided with a second single check valve.

Since the technical scheme is used, the utility model discloses the technological effect who gains has:

1. the blocked coal injection pipeline or the coal injection gun can be quickly treated, and the influence time of theoretical combustion temperature rise of a tuyere caused by no coal injection at a certain tuyere on blast parameters of the blast furnace is reduced.

2. The original method for treating the pulverized coal discharged to the air is changed, the working environment of workers is improved, and the dust collection risk of the workers is avoided.

3. The coal powder recovered from the pipeline or the coal gun blocked by the coal injection of the blast furnace is treated, so that the energy is saved and the coal powder is reused.

4. And environmental protection accidents are avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

The coal collecting device comprises a coal collecting device 1, a coal distributing device 2, a coal distributing device 3, a pipeline 4, a blast furnace coal injection gun 5, high-pressure nitrogen gas 6, a quick joint 7, a steam pipe network 8, external steam 9, a first partition plate 10, a second partition plate 11, a ball valve I12, a single check valve II 13, a three-way valve III 14, a ball valve IV 15, a three-way valve V16, a ball valve VI 17, a ball valve VII 18, a ball valve VIII 19, a ball valve VII 21, a coal taking port 22 and a bleeding port.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments:

the utility model discloses a coal powder collecting device for blocking a coal injection gun of a blast furnace, which comprises a coal collector 1 for collecting coal powder, wherein the coal collector 1 is in a hollow cylinder shape, is a cylinder with the wall thickness of 8mm, the diameter of 1000mm and the height of 2000mm, a coal taking port 21 is arranged on the side surface of the lower part of the coal collector 1, and the coal taking port 21 is provided with a sealing door for closing and opening the coal distributing port 21; meanwhile, the top of the coal collector 1 is provided with a dispersion port 22.

1/3 high position department in the inside top of coal collector 1, at the internally mounted steam pipe network 7 of coal collector 1, steam pipe network 7 and coal collector 1 concentric setting communicate through steam conduit and outside steam 8, and the opening and closing of steam conduit is controlled to eight 18 of installation ball valve on steam conduit, and steam pipe network 7 can play the sealed effect of emitting outside the fine coal powder. In addition, a first partition plate 9 and a second partition plate 10 are fixedly connected at the opposite positions of the top of the coal collector 1, the first partition plate 9 and the second partition plate 10 are installed in a crossed mode, the length of the second partition plate 10 is larger than that of the first partition plate 9, and a gap of 150mm-200mm is reserved between the second partition plate 10 and the first partition plate 9, so that the indirect sealing effect on the coal collector 1 is achieved.

The installation of the top centre of a circle position department of coal collector 1 stretches into the pipeline 3 of coal collector 1 again, and pipeline 3 passes second baffle 10 and steam pipe network 7, and pipeline 3 connects branch coal ware 2 through installation quick-operation joint 6, and quick-operation joint 6 is the metal material, fixedly sets up first branch pipe connection blast furnace coal injection rifle 4 on pipeline 3 between quick-operation joint 6 and branch coal ware 2, sets up branch pipe connection high pressure nitrogen gas 5 on first branch pipe. Installing a ball valve I11 between a blast furnace coal injection gun 4 and a cross point of a first branch pipeline and a branch pipeline, installing a three-way valve III 13 on the cross point of the first branch pipeline and the branch pipeline, arranging a second branch pipeline on a pipeline 3 between the first branch pipeline and a coal distributor 2 to be connected to the branch pipeline of the first branch pipeline so as to be communicated with high-pressure nitrogen 5, fixedly installing a three-way valve V15 on the cross point of the second branch pipeline and the pipeline 3, fixedly installing a ball valve VI 16 between the three-way valve V15 and the coal distributor 2, and fixedly installing a single check valve II 12 between the ball valve VI 16 and the coal distributor 2; a ball valve seventh 17 is fixedly arranged on the branch pipeline between the second branch pipeline and the high-pressure nitrogen 5, and a ball valve ninth 19 is fixedly arranged on the branch pipeline between the second branch pipeline and the first branch pipeline; and a ball valve four 14 is fixedly installed on the pipe 3 between the first branch pipe and the quick coupling 6.

The specific implementation manner of this embodiment: during normal production, the quick connector 6 is disconnected and connected when the coal gun is blocked. The method comprises the following steps: 1) connecting the quick connector 6, and opening a ball valve eight 18 and a ball valve four 14; 2) closing the ball valve six 16; 3) the pressure of the coal distributor 2 is utilized for back flushing, so that the coal dust in the pipeline 3 is flushed into the coal collector 1; 4) when weak black smoke appears at the top dispersing port 22 of the coal collector 1, the pipeline 3 is proved to be dredged; 5) closing the fourth ball valve 14 and the eighth ball valve 18, and opening the sixth ball valve 16 to normally inject coal.

When the pipeline 3 is not opened in the first method, a second method is adopted: 1) closing the fourth ball valve 14 and the sixth ball valve 16; 2) Opening a seventh ball valve 17, switching the direction of a fifth three-way valve 15, introducing high-pressure nitrogen 5 to blow coal powder into the coal collector 1, and dredging when coal is found at a bleeding port 22; 3) and closing the seventh ball valve 17, switching the direction of the fifth three-way valve 15, and opening the sixth ball valve to normally inject coal.

When the pipeline 3 is not opened in the first method and the second method, a third method is adopted: 1) connecting the quick connector 6, opening a ball valve eight 18 and a ball valve four 14, and closing a ball valve six 16; 2) the three-way valve III 13 and the three-way valve V15 switch directions, and the ball valve VII 17 and the ball valve VII 19 are opened; 3) blowing coal powder into a coal collector 1 by using high-pressure nitrogen 5; 4) when weak coal dust or black smoke appears at the diffusing port of the coal collector 1, the pipeline 3 is proved to be dredged; 5) closing the fourth ball valve 14, the seventh ball valve 17, the eighth ball valve 18 and the ninth ball valve 19, and switching the three-way valve 13 and the five-way valve 15; 6) and opening a ball valve six 16 to normally inject coal.

The superfine coal powder and fine water particles in high-pressure steam are combined and sink to the bottom of the collecting device through the coal collector 1, so that the problem of environmental pollution is solved; the sealing door of the coal taking port 21 is opened periodically for recycling, so that the problem of energy waste is solved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape, principle and the like of the invention are covered by the protection scope of the invention.

Claims

1. The coal powder collecting device is got rid of in the jam of blast furnace coal injection coal rifle, its characterized in that: the coal dust collecting device comprises a coal collecting device (1) for collecting coal dust, wherein the top of the coal collecting device (1) is connected to a coal distributor (2) through a pipeline (3), a first branch pipeline is arranged on the pipeline (3) and connected with a blast furnace coal injection gun (4), a branch is arranged on the first branch pipeline and connected with high-pressure nitrogen (5), a first ball valve (11) is arranged between the blast furnace coal injection gun (4) and the cross point of the first branch pipeline, a seventh ball valve (17) is arranged on the branch pipeline connected with the high-pressure nitrogen (5), a sixth ball valve (16) is arranged between the coal distributor (2) and the first branch pipeline, a quick connector (6) is arranged on the pipeline (3), and a fourth ball valve (14) is arranged between the quick connector (6) and the first branch pipeline; the bottom of the coal collector (1) is provided with a coal taking port (21).

2. The device for collecting the coal dust removed by the blockage of the blast furnace coal injection lance according to claim 1, is characterized in that: the coal collector (1) is higher than the outlet of the pipeline (3) and is provided with a steam pipe network (7), the steam pipe network (7) is communicated with external steam (8) through a steam pipe, and the steam pipe is provided with a ball valve eight (18).

3. The device for collecting the coal dust removed by the blockage of the blast furnace coal injection lance according to claim 2, is characterized in that: two first baffles (9) and second baffles (10) which are inclined downwards are fixedly arranged at the relative positions of the tops of a steam pipe network (7) in the coal collector (1), a gap is reserved between the first baffles (9) and the second baffles (10), the length of the second baffles (10) is larger than that of the first baffles (9), and the pipeline (3) penetrates through the second baffles (10).

4. The device for collecting the coal dust removed by the blockage of the blast furnace coal injection lance according to claim 1, is characterized in that: a second branch pipeline is arranged between the ball valve six (16) and the high-pressure nitrogen (5), and the second branch pipeline is connected to a branch pipeline which is arranged on the first branch pipeline and connected with the high-pressure nitrogen (5); install three-way valve five (15) on the intersect of second branch pipeline and pipeline (3), install ball valve nine (19) on the branch pipeline of second branch pipeline and first branch pipeline, install three-way valve three (13) on the intersect of first branch pipeline, install single check valve two (12) on pipeline (3) between ball valve six (16) and coal distributor (2).