Pressure relief device for air supply pipeline of blast furnace blower

Abstract

The utility model relates to a blast furnace blower air supply pipeline pressure relief device, and belongs to the technical field of blast furnace blower equipment in the metallurgical industry. According to the technical scheme, an air supply pipeline (7) is a fan pipeline for an air blower to supply air to the blast furnace, an electric air supply adjusting valve (4), a pneumatic check valve (3) and an electric air supply valve (2) are sequentially installed on the air supply pipeline (7) according to the flow direction of air, and a pressure relief pipeline (8) is led out of the air supply pipeline (7) between the pneumatic check valve (3) and the electric air supply valve (2) and connected to an emptying pipeline (9). An air discharging silencer (6) is mounted on the air discharging pipeline (9); a pressure relief gate valve (1) is mounted on the pressure relief pipeline (8); and a pneumatic anti-surge valve (5) is mounted on the emptying pipeline (9). The utility model has the beneficial effects that the air pressure between the check valve of the fan pipeline and the electric air supply valve can be released, so that the check valve is opened, and the air volume required by the blast furnace is ensured.

Description

Technical Field

[0001] The utility model relates to a pressure relief device for an air supply pipeline of a blast furnace blower, belonging to the technical field of blast furnace blower equipment in the metallurgical industry. Background Art

[0002] The blast furnace blower is a kind of power machine that can collect part of the atmosphere, and form a blast furnace blast with a certain pressure and flow rate by pressurizing the air, and then adjust the wind pressure and air volume according to the needs of the blast furnace conditions and transport it to the blast furnace. Its main function is to supply air to the blast furnace to ensure the oxygen required for the burning coke and injected fuel in the blast furnace. In addition, there must be a certain wind pressure to overcome the resistance of the air supply system and the material column, and keep the blast furnace at a certain top pressure.

[0003] During the operation of the blast furnace blower, the air is sent into the blower after dust removal through the air filter, and then sent into the blast furnace through blades at various levels and air supply ducts. The air supply duct is equipped with an air supply regulating valve, a check valve and an electric air supply valve. Due to the wind pressure between the check valve and the electric air supply valve in the air supply duct, the check valve often fails to open before air is supplied, affecting the blast furnace's air supply and normal production. Utility Model Content

[0004] The utility model aims to provide a blast furnace blower air supply duct pressure relief device, which can release the wind pressure between the blower duct check valve and the electric air supply valve, thereby opening the check valve, ensuring the air volume required by the blast furnace, and solving the problems existing in the background technology.

[0005] The technical solution of the utility model is:

[0006] A pressure relief device for an air supply duct of a blast furnace blower comprises an electric air supply valve, a pneumatic check valve, an electric air supply regulating valve, an air venting silencer, an air supply duct, a pressure relief duct and a venting duct. The air supply duct is a fan duct for the blower to supply air to the blast furnace. The electric air supply regulating valve, the pneumatic check valve and the electric air supply valve are sequentially installed on the air supply duct according to the flow direction of the wind. The pressure relief duct is led out from the air supply duct between the pneumatic check valve and the electric air supply valve, and is connected to the venting duct, on which the air venting silencer is installed.

[0007] A pressure relief gate valve is installed on the pressure relief pipeline.

[0008] A pneumatic anti-surge valve is installed on the vent pipeline.

[0009] The pressure relief pipe is connected to the vent pipe between the pneumatic anti-surge valve and the vent silencer.

[0010] The beneficial effects of the utility model are as follows: compared with the traditional device without pressure relief, the wind pressure between the check valve and the electric air supply valve of the fan duct can be released, and the wind pressure can be released through the pressure relief valve and the duct to the air vent silencer to reduce environmental noise, and the check valve can be opened quickly to send out the air volume required by the blast furnace in the shortest time. The structure is simple and the cost is low, and the situation that the check valve cannot be opened due to wind pressure when the blast furnace needs air is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] In the figure: pressure relief gate valve 1, electric air supply valve 2, pneumatic check valve 3, electric air supply regulating valve 4, pneumatic anti-surge valve 5, vent silencer 6, air supply duct 7, pressure relief duct 8, vent duct 9. DETAILED DESCRIPTION

[0013] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0014] Refer to the attached Figure 1 A pressure relief device for an air supply duct of a blast furnace blower comprises an electric air supply valve 2, a pneumatic check valve 3, an electric air supply regulating valve 4, a venting silencer 6, an air supply duct 7, a pressure relief duct 8 and a venting duct 9. The air supply duct 7 is a fan duct for the blower to supply air to the blast furnace. According to the flow direction of the wind, the electric air supply regulating valve 4, the pneumatic check valve 3 and the electric air supply valve 2 are sequentially installed on the air supply duct 7. The pressure relief duct 8 is led out from the air supply duct 7 between the pneumatic check valve 3 and the electric air supply valve 2, and is connected to the venting duct 9, on which the venting silencer 6 is installed.

[0015] In this embodiment, refer to the attached Figure 1 The blast furnace blower air supply duct pressure relief device comprises a pressure relief gate valve 1, an electric air supply valve 2, a pneumatic check valve 3, an electric air supply regulating valve 4, a pneumatic anti-surge valve 5, an air venting silencer 6, an air supply duct 7, a pressure relief duct 8 and a venting duct 9, wherein the pressure relief gate valve 1, the electric air supply valve 2, the pneumatic check valve 3, the electric air supply regulating valve 4 and the pneumatic anti-surge valve 5 are all valves commonly used in the art, a pressure relief duct 8 is led out between the electric air supply valve 2 and the pneumatic check valve 3, the pressure relief gate valve 1 is installed, and the pressure relief duct 8 is connected to the venting duct 9 after the pneumatic anti-surge valve 5 and before the air venting silencer 6, so that the pressure after the pneumatic check valve 3 is discharged into the atmosphere through the pressure relief duct 8, the pressure relief gate valve 1 and the venting silencer 6, forming a set of blower-specific pressure relief devices.

Claims

1. A blast furnace blower air supply duct pressure relief device, characterized in that: The invention comprises an electric air supply valve (2), a pneumatic check valve (3), an electric air supply regulating valve (4), an air venting silencer (6), an air supply pipe (7), a pressure relief pipe (8) and an air venting pipe (9). The air supply pipe (7) is a fan pipe for a blower to supply air to a blast furnace. According to the flow direction of the air, the electric air supply regulating valve (4), the pneumatic check valve (3) and the electric air supply valve (2) are sequentially installed on the air supply pipe (7). The pressure relief pipe (8) is led out from the air supply pipe (7) between the pneumatic check valve (3) and the electric air supply valve (2) and connected to the air venting pipe (9). The air venting silencer (6) is installed on the air venting pipe (9).

2. A blast furnace blower air supply duct pressure relief device according to claim 1, characterized in that: A pressure relief gate valve (1) is installed on the pressure relief pipeline (8).

3. A blast furnace blower air supply duct pressure relief device according to claim 2, characterized in that: A pneumatic anti-surge valve (5) is installed on the venting pipeline (9).

4. A blast furnace blower air supply duct pressure relief device according to claim 3, characterized in that: The pressure relief pipe (8) is connected to the vent pipe (9) between the pneumatic anti-surge valve (5) and the vent silencer (6).

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