Pipeline connecting system with turbine and boiler arranged compactly

Abstract

The invention discloses a pipeline connecting system with a turbine and a boiler arranged compactly. The pipeline connecting system at least comprises a boiler with a boiler heating face and boiler outlet headers, the high-position turbine and pipeline systems connected between the boiler outlet headers and the high-position turbine. The boiler outlet headers are close to the high-position turbine, a boiler heating face pipe bundle (a heating face pipe bundle boiler outer section) connected with each boiler outlet header is arranged to be in an L shape comprising a horizontal section and a perpendicular section. Heat expansion and heat stress of the systems, between the boiler and the turbine, of the boiler outlet headers are absorbed through pipe bundles connected to the boiler outlet headers, short-distance connection of high-temperature and high-pressure steam pipelines between the turbine and the boiler can be achieved, the use amount of high-temperature and high-pressure pipeline materials, bends and other pipe fittings is substantively reduced, pressure losses and heat dissipation losses of the high-temperature and high-pressure steam pipeline systems are reduced in a real sense, finally, the investment of the pipeline systems is saved, and economical efficiency of a unit is improved as well.

Description

technical field [0001] The invention relates to a pipe connection system with a compact layout of a furnace, which belongs to the field of power generation. Background technique [0002] With the continuous improvement of material technology and the improvement of thermal power theory, the parameters of steam have experienced the development process of low pressure, medium pressure, high pressure, ultrahigh pressure, subcritical, supercritical and ultra supercritical. In order to further improve the efficiency of thermal power generation units, all countries in the world have successively developed units with higher parameters. However, to develop high-parameter units, the price of related materials will also increase significantly, especially for high-temperature and high-pressure steam pipes between machine furnaces, such as main steam pipes, reheat steam pipes, etc. If the parameters are raised from the current 600°C level to 700°C grade, calculated according to the curr...

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Problems solved by technology

Obviously, this conventional piping system connection method fails to take advantage of the high-level and low-level layout. Compared with the conventional steam turbine generator set layout, although it can greatly reduce the straight pipes of high-temperature and high-pressure steam pipelines, the elbows of the system There will still be more, because the resistance coefficient of the elbow is much larger than that of the straight pipe, if the cast steel elbow is used, not only the bending radius is small (about 1.5D), but also its price is about 5 to 7 times that of the straight pipe. The pressure drop of the large-diameter high-temperature and high-pressure steam pipeline system does not drop significantly, the economics of unit operation have not changed much, and the project investment is still large, which completely runs counter to the original intention of shortening the high-temperature and high-pressure steam pipeline by high-level and low-level layout

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