The utility model discloses an ordinary pressure heating evaporation ware, it mainly by flat base plate, cylinder, ellipsoidal head, go up the ring pipe board, down ring pipe board, heat exchange tube, central circulating pipe etc. Form, the heat exchange tube both ends are welded fastening in last ring pipe board and ring pipe board down respectively, central circulating pipe difference welded fastening in last ring pipe board ring pipe board and flat base plate under, the ordinary pressure heating evaporation ware working process is, solution is in feed liquor pipe joining equipment tube side, and steam through heat exchange tube next door heating solution, makes the heating of intraductal solution heat up until the boiling through advancing in the steam pipe gets into the equipment shell side, and the solution evaporation produces vapor and discharges through the gas vent, and the steam heat transfer produces the comdenstion water through the play of the condensate outlet bank of tubes in the shell side, and solution is discharged through the bottom fluid -discharge tube behind the heating evaporation, the utility model discloses it is big that ordinary pressure heating evaporation ware has a heat transfer area, and heat transmission effect is good, heating evaporation can the reinforce etc. The advantage.