Thermocooler-related
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The desuperheater reduces the temperature by injecting boiler water. In the engineering design, a safety valve is installed on the pipeline between the control valve of the boiler water injection line and the point where the water enters the desuperheater. Experts, what are the functions of this safety valve?
Are there any other functions? The pressure of the water in our boiler is 5.8 MPa, while that of the high-pressure steam is 3.6 MPa. However, both pipelines are of 5A grade; one is made of ordinary carbon steel, whereas the one for steam is made of heat-resistant steel.
Is it to prevent backflow of boiler pressure from causing overpressure in the water injection line?
Reduce temperature first, then reduce pressure to prevent overpressure
I have never seen a safety valve installed on the desuperheating water of a power station boiler in my experience.
Could you tell me the specific reasons? It’s possible!
The temperature reducer I am referring to is used on the steam pipes of the reboiler.
It’s just my personal opinion; after all, the steam pressure is much higher than that of water.
What is the set pressure of the safety valve? Is this the only safety valve along the entire boiler water line?
It’s not a boiler; it’s a temperature reducer on the steam pipeline of the reboiler, which requires boiler water to be injected in order to reduce the temperature.