The　desulfurized　flue　gas　from　coal-fired　power　plants　is　discharged　with　pollutants　and　a　lot　of　heat　and　water　vapor　into　the　environment.　To　synchronously　reduce　the　pollutant　emission　and　recover　the　heat　and　water,　a　novel　technology　was　proposed　and　applied　in　a　coal-fired　power　plant　after　experimental　and　pilot　studies.　The　technology,　referred　to　as　phase　transition　agglomeration　system　(PTAS),　was　developed　based　on　condensational　growth　and　subsequently　enhanced　removal　of　particles　and　droplets　under　supersaturated　conditions.　Unlike　existing　research,　the　supersaturation　here　is　produced　by　cooling　the　desulfurized　flue　gas　through　an　appropriate　approach,　which　is　more　feasible　for　industrial　application.　Meanwhile,　heat　and　water　are　recovered.　Field　measurements　were　conducted　to　study　its　performance.　Particle　removal　efficiencies　of　the　full-scale　PTAS　were　53.05%　and　71.11%　at　90%　and　75%　loads,　respectively,　and　the　emission　concentrations　were　reduced　to　below　5　mg/m3.　SO3　removal　efficiency　was　nearly　20%　at　the　initial　concentration　of　~2.9　mg/m3.　＞87%　of　the　heat　released　by　the　flue　gas　and　over　83%　of　the　condensate　were　recovered.　The　recovered　heat　was　utilized　directly　to　heat　the　feed　water　of　boiler,　and　the　recovered　water　could　be　used　to　replenish　the　desulfurization　slurry　after　alkali　treatment.　The　heat　and　water　recovery　rates　were　up　to　3.59　MW　and　4.32　t/h,　respectively,　which　improved　the　economics　of　the　power　plant.　The　good　performance　of　PTAS　in　particle　and　SO3　removal,　together　with　heat　and　water　recovery,　was　demonstrated　in　this　full-scale　study,　and　worthwhile　data　and　experiences　were　provided　for　the　development　of　such　technologies　for　further　treatment　of　coal-fired　flue　gases.　©　2020　Elsevier　B.V.