CN218596443U

CN218596443U - Blast furnace coal lance pipeline backfire preventing protection device

Info

Publication number: CN218596443U
Application number: CN202222923591.2U
Authority: CN
Inventors: 李红全; 傅友根; 高峰; 宗金虎; 陈召飞
Original assignee: Wuhu Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Wuhu Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-03-10
Anticipated expiration: 2032-11-03

Abstract

The utility model discloses a blast furnace coal gun pipeline backfire preventing protection device, which comprises a blowing pipeline and a blast furnace, wherein the terminal of the blowing pipeline is communicated with the blast furnace through a coal gun connecting pipe; the coal gun injection device is characterized by further comprising a ball valve for isolating the coal gun connecting pipe when the pressure in the furnace is greater than the injection pressure, and the ball valve is integrally arranged on the coal gun connecting pipe. The blast furnace coal barrel pipeline backfire preventing protection device is reasonable in structural design, and can realize that after a blowing pipeline is cracked or broken, the blast furnace is cut off from the external environment in the first time by utilizing the mechanical principle of a ball valve in a very short time, so that the backfire condition is prevented; and the structure is simple, and the maintenance is simple and convenient.

Description

Blast furnace coal lance pipeline backfire preventing protection device

Technical Field

The utility model belongs to the technical field of the blast furnace technique and specifically relates to a blast furnace coal gun pipeline anti-backfire protection device is related to.

Background

Coal injection in a blast furnace is a process of feeding pulverized coal into the blast furnace through a coal conveying pipeline by nitrogen (air pressure). The pulverized coal particles injected under high pressure have larger kinetic energy, and the abrasion and impact of the pulverized coal particles on the pipeline cannot be avoided in the conveying process; at the present stage, most production enterprises take metal hoses or seamless steel pipes as main connecting materials among the pulverized coal conveying equipment, and the materials are difficult to bear the washing of pulverized coal particles for a long time; meanwhile, the connecting pipelines between the devices are not in a linear layout, and the pipelines at the elbows are more seriously abraded.

With the continuous progress of the modern iron-making process, the coal injection pressure and the pressure in the furnace are gradually increased, the kinetic energy of the pulverized coal in the conveying process is larger, the conveying capacity in unit time is also higher, and the abrasion of coal injection system equipment and pipelines is directly caused to be more serious; the abrasion of the conveying pipeline is slight, so that air holes are formed, the pulverized coal overflows, the environment is polluted, and the waste of air pressure wind or nitrogen energy is caused; the coal powder conveying pipeline is broken due to the serious condition, high-temperature coal gas in the blast furnace is tempered along the pipeline from a coal gun at the terminal of the pipeline, then coal gas poisoning and explosion accidents are caused, the coal gas poisoning and explosion accidents are difficult to find and control at the first time after the accidents occur, and great hidden dangers exist in the aspects of safety, environmental protection and the like.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to solve the technical problem that a blast furnace coal rifle pipeline backfire prevention protection device is provided, it can realize jetting pipeline fracture or fracture back, accomplishes the wall that blast furnace and external environment are connected in the very short time.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts does:

the blast furnace coal gun pipeline backfire preventing protection device comprises a blowing pipeline and a blast furnace, wherein the terminal of the blowing pipeline is communicated with the blast furnace through a coal gun connecting pipe; the coal gun injection device is characterized by further comprising a ball valve for isolating the coal gun connecting pipe when the pressure in the furnace is greater than the injection pressure, and the ball valve is integrally arranged on the coal gun connecting pipe.

Further:

and valve structures are arranged on the blowing pipeline and positioned on two sides of the ball valve.

And a control valve is arranged on the injection pipeline, a temperature sensor is arranged on the coal gun connecting pipe, and the temperature sensor is connected with the control valve.

And the two ends of the ball valve are welded by seamless steel pipes to form a coal gun connecting pipe.

The seamless steel pipe of each side of the ball valve is connected with a three-way joint, and the other two joints of the three-way joint are respectively connected with a valve structure and a quick joint.

The valve structure is a ball valve.

The quick connector is a metal quick connector.

Compared with the prior art, the utility model, have following advantage:

the blast furnace coal gun pipeline backfire preventing protection device is reasonable in structural design, and can realize that after a blowing pipeline is cracked or broken, the connection between a blast furnace and the external environment is cut off in the first time by utilizing the mechanical principle of a marble valve in a very short time, so that the backfire condition is prevented; and the structure is simple, and the maintenance is simple and convenient.

Drawings

The following brief description of the drawings and reference numerals in the drawings forms a part of this specification:

fig. 1 is a schematic view of the structure of the device of the present invention.

In the figure:

1. the device comprises a ball valve, 2 parts of a seamless steel pipe, 3 parts of a ball valve, 4 parts of a three-way joint and 5 parts of a metal quick joint.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

As shown in fig. 1, the blast furnace coal gun pipeline backfire preventing protection device comprises a blowing pipeline, a blast furnace, a coal gun connecting pipe and a ball valve 1 for cutting off the coal gun connecting pipe when the pressure in the blast furnace is greater than the blowing pressure; the terminal of the injection pipeline is communicated with the blast furnace through a coal gun connecting pipe, and the ball valve is integrally arranged on the coal gun connecting pipe.

The utility model can realize that the blast furnace is cut off from the external environment in the first time by utilizing the mechanical principle of the spring valve in a very short time after the blowing pipeline is cracked or broken, thereby preventing the tempering condition; and the structure is simple, and the maintenance is simple and convenient.

A control valve is arranged on the injection pipeline, a temperature sensor is arranged on the coal gun connecting pipe, and the temperature sensor is connected with the control valve; the coal gun connecting pipe is cracked, broken and the like, the pressure in the furnace is larger than the injection pressure, the temperature sensor is used for detecting the temperature change to judge whether tempering occurs or not, the on-off is controlled by the control valve in time, and the control is timely.

Valve structures are arranged on the blowing pipeline and positioned on two sides of the ball valve; both ends of the ball valve are welded by seamless steel pipes 2 to form a coal gun connecting pipe.

Furthermore, the seamless steel pipe on each side of the ball valve is connected with a three-way joint 4, the other two joints of the three-way joint are respectively connected with a valve structure and a quick joint, the valve structure is a ball valve 3, and the ball valve is a blow-off valve; preferably, the quick connector is a metal quick connector 5, and the quick connector is simple in structure and convenient to maintain.

One end of the three-way joint is connected with a ball valve which is used as a drain valve, so that the dredging can be completed under the condition of not disassembling when the connecting pipe is blocked; other ends are respectively connected with the seamless steel pipe and the metal quick connector to form a connecting pipeline between the coal injection system and the coal injection terminal coal gun. When the coal injection pipeline is broken, the marble in the marble valve automatically falls back to complete the separation of the blast furnace from the outside.

The utility model aims to cut off the connection with the blast furnace by the blowing system in the first time when the blowing pipeline cracks or breaks, thereby effectively avoiding the tempering condition; the coal gun connecting pipe at the end of the injection system is mainly reformed, and a ball valve is additionally arranged on the connecting pipe, so that the normal conveying of the coal powder is ensured when the injection pressure is greater than the pressure in the furnace; when the blowing connecting pipe is cracked, broken and the like, and the pressure in the furnace is higher than the blowing pressure, the marble in the marble valve automatically falls back due to the change of the front and back pressure of the valve body, so that the blowing system and the blast furnace are effectively isolated in time, and the tempering condition is prevented. The transformation and installation are simple and convenient, the maintenance is simple, the investment cost is low, and the method can be widely popularized.

The above-mentioned is only for the description of the preferred embodiments of the present invention, and the above-mentioned technical features can be combined at will to form a plurality of embodiments of the present invention.

The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.

Claims

1. A blast furnace coal gun pipeline backfire preventing protection device comprises a blowing pipeline and a blast furnace, wherein the terminal of the blowing pipeline is communicated with the blast furnace through a coal gun connecting pipe; the method is characterized in that: the coal gun injection device is characterized by further comprising a ball valve for isolating the coal gun connecting pipe when the pressure in the furnace is greater than the injection pressure, and the ball valve is integrally arranged on the coal gun connecting pipe.

2. The blast furnace coal lance pipe backfire preventing protection device as defined in claim 1, characterized in that: and valve structures are arranged on the blowing pipeline and positioned on two sides of the ball valve.

3. The blast furnace coal lance pipeline backfire preventing protection device as claimed in claim 1, wherein: and a control valve is arranged on the injection pipeline, a temperature sensor is arranged on the coal gun connecting pipe, and the temperature sensor is connected with the control valve.

4. The blast furnace coal barrel rail backfire preventing protection device as claimed in claim 2, wherein: and the two ends of the ball valve are welded by seamless steel pipes to form a coal gun connecting pipe.

5. The blast furnace coal lance pipe backfire preventing protection device as defined in claim 4, characterized in that: the seamless steel pipe of each side of the ball valve is connected with a three-way joint, and the other two joints of the three-way joint are respectively connected with a valve structure and a quick joint.

6. The blast furnace coal lance pipe backfire preventing protection device as claimed in claim 5, wherein: the valve structure is a ball valve.

7. The blast furnace coal lance pipe backfire preventing protection device as defined in claim 5, characterized in that: the quick connector is a metal quick connector.