So, you wanna heat water by direct steam injection. I could suggest you an atricle on the subject in "Chemical Engineering Progress" May 2010 with the title "Producing Hot Water by Direct Steam Injection" by Sutter, Philip.
I am afraid I don't have this one; otherwise, i will attach it for you. This ...

Is this possible? There is always an equilibrium line (the saturated one). The condensate first of all goes from sub-cooled liquid to the saturated liquid sate, then, it will pass through a "phase change" process from partially liquid to complete vapor state (saturated vapor state). After that, the ...

One thing is sure from your system description, that you will be going for vertical separator due to low Water-gas ratio. You can get 2-phase vertical separtor sizing easily in books like Ludwig, Evans, GPSA engg. data Handbook etc. The major steps are:
1.Determination of K factor (based on ...

is it a 2-phase separation or a 3-phase one.