Built -in liquid gas diphase doublestage heater of boiler

The utility model discloses a built -in liquid gas diphase doublestage heater of boiler, the medium water heater that puts in series on the flue gas pipe of boiler, medium water heater in the water asthe heat transferring medium of circulation flow is equipped with in the heating surface that sets up, the boiler flue gas is through medium water heater's heating surface outer wall with the hot -water heating, medium water heater connects through collection case communicating pipe and medium gas heater, in the heating surface of water through collection case communicating pipe flow direction medium gas heater in medium water heater's the heating surface, flows in at last behind the boiler grade, medium gas heater puts in series among the air conduit, and air current among the air conduit isheated when medium gas heater's heating surface outer wall. The utility model discloses a medium water is gaseous with the liquid gas diphase heat transfer heating medium of dielectric gas, and through diphase doublestage hea