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