CONDENSING WATER-HEATING BOILER Russian patent published in 2014 - IPC F24H1/00 

FIELD: heating.

SUBSTANCE: boiler comprises a radiation part consisting of concentrically mounted inner and outer cylinders, and of the inner lid with the pipe with the burner, the outer lid with a cylindrical sidewall with a pipe, the tube grid with the central opening and the openings located on the periphery, which edges are attached to the ∩- shaped flue tubes. Under the tube grid a water jacket with a flange is located. The tube grid from the bottom between the ends of each fire tube is attached to the inner and outer bottoms with the flange. The diameter of the lower base of the inner bottom provides access to the weld joints of fastening the flue tubes and the inner cylinder to the tube grid. In the outer bottom there are openings communicating with the bypass tubes to the openings in the flange. The boiler comprises a contact-recuperative part located parallel to the radiation part. The radiation and the contact-recuperative parts are interconnected by means of a closed collector of fluid. The housing of the contact-recuperative part is connected to the condensate return pipe inserted with the other end into the closed collector of fluid.

EFFECT: improving maintainability of the unit, simplification and reduction in cost of the radiation part.

1 dwg