HOT WATER BOILER Russian patent published in 2008 - IPC F24H1/12 

FIELD: heat-power engineering.

SUBSTANCE: boiler consists of a furnace, convection area with ducts forming a flue, heat-exchanging tube hydraulic system consisting of individual convection and radiation tube sections connected to each other subsequently in water flow direction and opposite to flue gas direction. Connection of heat exchanging tubes in sections and connection of sections to each other is made in the form of loops so that end of one tube in a section is connected with the beginning of the other tube which is adjacent, and the end of one section is connected with the beginning of the other one. Tangential-slot reducing piece made in the form of a rectangular cross-section tube the inlet and outlet ends of which are placed tangentially in walls of two adjacent tubes is used for connecting two adjacent tubes. Bigger size of tangential-slot reducing piece cross section is directed along the tube length. Cross section area of tangential-slot reducing piece channel is equal to cross section area of each tube being connected. Hydraulic system of heat exchanging tubes consists of two independent strings - left one and right one located symmetrically.

EFFECT: improving heat exchange efficiency, reducing fuel consumption, ensuring fail-safety, reliability and long service life of the boiler operating on any fuel type under conditions of water treatment system non-availability.

6 dwg