How are process parameters such as boiler furnace temperature and furnace tube pressure calculated?
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We are formulating a process card. Process parameters such as boiler furnace temperature and furnace tube pressure are already given by the boiler manufacturer. We still need to calculate them. Please advise.
Furnace tube pressure is divided into operating pressure, design pressure and hydraulic test pressure. Operating pressure: Depends on the steam operating pressure design pressure required by the user: The pressure used by the boiler design unit to calculate the boiler strength based on the operating pressure and a value taken considering the hydraulic test value. The hydraulic test pressure: According to the specification and combined with the value of the design pressure, the boiler furnace temperature is determined by the heat that needs to be absorbed by the flow of water to steam at the design temperature and design pressure to provide the heat emitted by the fuel to the furnace. The heat corresponds to the temperature within a certain furnace volume, but the theoretical temperature is lower than the actual temperature because the furnace tube will absorb a large amount of heat. If you are preparing a process card, you only need to transfer the design parameters into the card. Generally, users do not have the ability to calculate these parameters.
Just sign and write according to the process parameters given by the manufacturer.
I calculated it myself by referring to the chemical industrial furnace design calculation case. It is very simple and the results are not much different. This is already a very mature thing.