| 摘要 |
The invention relates to a cylindrical horizontal steam boiler of the so-called "Steamblock" construction consisting of a cylinder (1) and appurtenant heads (2 and 3), partly filled with water and with the steam space (4) above it. All the heat transfer surfaces are submerged in the water space and they consist of flame tube (5), connecting channel (6) and the flue gas duct (7). The flue gas duct (7) is fitted with vertical finned tubes (8 and 9) cooled with water from the inside and heated with flue gases from the outside. The boiler has two flue gas passes, and is fitted with baffle plates (11 and 12) which force the boiler water to flow from the supply tube (13) in direction opposite to the flue gas flow direction, which results in flue gas outlet temperatures below the boiler working medium temperature, which is not possible in conventional boiler constructions. In this way, the boiler efficiency increase by 4 to 5 % is possible, the boiler construction is simplified, and the material consumption reduced.
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