A method 1 further comprising a step of condensing the vapor generated during the concentration of the black liquor by using {HEAD ~ water} as a condensing medium, and {TAIL ~ said water} generates steam that is taken to pre heat the combustion air 
A method 1 further comprising a step of condensing the vapor generated during the concentration of the black liquor by using { HEAD ~ water } as a condensing medium , and { TAIL ~ said water } generates steam that is taken to pre heat the combustion air
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH