Why should flue gas medium choose large size fan-shaped goggle valve
Blast furnace gas is a by-product produced in the process of blast furnace ironmaking, in large iron and steel enterprises, the production of blast furnace gas is considerable, and it needs to be transported through a larger diameter pipeline to meet the subsequent utilization (such as for power generation, heating furnace, etc.). Therefore, from the perspective of pipeline size matching, large size gas valves are needed to effectively control the on-off of gas.
The blast furnace gas contains flammable and toxic components such as carbon monoxide, which has certain danger. Therefore, the sealing requirements for the partition device are very high, in order to prevent gas leakage caused by poisoning, explosion and other safety accidents.
So, for the medium of blast furnace gas, why choose a large diameter fan-shaped blind plate valve?
1. Good sealing performance
Thanks to the unique structural design of the sector blind valve, the sealing pair (such as between the valve plate and the seat) can be tightly fitted in the closed state. For large diameter pipes, this tight fit can effectively prevent the leak of blast furnace gas. For example, high-quality fan-shaped electric blind valve use sealing materials such as rubber seals, which are squeezed and deformed when the valve plate is closed and filled in the tiny gap between the valve plate and the seat to ensure the sealing effect.
2. Small flow resistance loss
When the fan valve is opened, the shape and opening mode of the valve plate make the gas flow in the pipeline relatively smooth. It is less of an obstacle to gas flow than some other types of valves. This is very important for the high flow medium of blast furnace gas, because the smaller flow resistance can reduce the energy loss during the gas transmission process and reduce the pressure requirements for subsequent equipment (such as gas compressors, etc.).
3. Suitable for large diameter pipeline installation requirements
The structure design of large diameter fan-shaped blind valve is convenient for installation and maintenance on large diameter blast furnace gas pipelines. It is usually connected by flange connection and so on, which can be firmly connected with the pipeline. Moreover, the overall structure of this valve is compact, compared with other partition valves of the same caliber, it occupies less space, and is more suitable for use in the complex pipeline layout environment of the steel plant.
4. Reliable cutting function
It is necessary to cut off the gas supply reliably in the case of the maintenance or fault treatment of the blast furnace gas equipment. The fan-shaped blind valve can provide a positive cutting force to ensure that the valve plate completely blocks the gas passage. Especially in emergency situations, such as pipeline leakage and other accidents, the large diameter fan blind valve can respond quickly, cut off the gas, and prevent the further expansion of the accident.
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