supercritical boiler is untility boiler, the pressure and temp are very high over steam critical point(14.7Mpa, 560 C), and the capacity at least 1000t/h.
For your case, my idea is : first get saturated steam, after seperator, precede superheating upto 800 degree.
The key is control pressure...
Boiler is right.
It is very simple to have Chinese PV License.
First, you got to contact SELO.
http://www.cbpvi.org/special1.html
Then you can ask or download some application forms.
Filling all forms and all paper water done.
You could send application to SELO.
Normally 10 working days...