Blowdown device for steam power plants

In a steam power plant, in combination, a water chamber and a blowdown device comprising at least one substantially straight tube having a longitudinal axis and disposed substantially horizontally in a volume of water received in said water chamber, said tube having a substantially circular cross section and being formed with a multiplicity of holes having a substantially uniform diameter for introducing, into the water received in said water chamber, steam that is flowing in the tube, all of said holes being located within a limited area of the peripheral surface of said tube, said area extending in longitudinal direction of said tube over a major part of the length thereof, said holes being disposed mutually aligned on respective diametrically opposite sides of said tube in circumferential rows spaced one from another a distance equal to at least 2.5 times the diameter of the holes, said circumferential rows respectively spanning a circular arc segment of less than 90.degree., the holes of said circumferential rows being substantially equal in number above and below a horizontal plane passing through said longitudinal axis of said tube, the spacing between mutually adjacent rows of said holes being greater than the spacing between mutually adjacent holes in the respective rows of said holes on each of said opposite sides of said tube, and said limited area of the peripheral surface of said tube being located at sides of the tube whereat each of the holes at the middle of the respective circumferential rows of holes has an axis extending in horizontal direction.