HORIZONTAL CYLINDRICAL HEAT-PIPE FIRE-TUBE BOILER WITH BOILING BED FURNACE

摘要

The invention relater to boiler industry and can be used in municipal and industrial power engineering. The invention provides to increase boiler's operational reliability, its efficacy and production output, as well as to simplify its manufacture. The horizontal heat-pipe fire-tube boiler comprises a water-washed flue tube limited by the front and rear walls, and a system of fire-tubes connected to the flue tube over a flue gas path, wherein a boiling bed furnace is arranged in the bottom part of the flue tube and provided with an air distribution grate forming air ducts connected to a blow fan, each air duct has an outlet for air supply beneath the fuel bed. Each air duct is formed by a first channel welded by its flange edges to the flue tube and by its ends welded to the front and rear walls limiting the flue tube, and the flue tube part to which said channel is welded. Outlets for air supply beneath the fuel bed are formed by openings in the channel flange which faces the boiler center, second channel is welded by its edges to the first channel post and also welded by its end edges to the front and rear walls of the flue tube. So optimum air distribution in the fuel bed is provided enhancing mixing fuel particles in the bed and reducing fuel losses caused by incomplete chemical and mechanical fuel combustion which leads to increase of the boiler efficacy and its production output.