Superheated steam and water together

[pranj5]

Can't understand what you want to mean be "Boiler". Though in sense you can say that if the Boiler is supposed to supply saturated steam instead of superheated steam.
Though this process is basically different from Boilers in one point. In Boilers, the heating is isobaric i.e. the pressure remains constant while the temperature increases. But, in this process, the volume remains constant and both the temperature and pressure increase.