Steam generator of a water-tube type

A water-tube steam generator for fossil fuel comprising:

• a heat distributor that consists of a great number of fundamental blocks with the shape of an oblong parallelepiped of rectangular faces, made with a material of high thermal conductivity where the water-tubes of high thermal conductivity are lengthwise embedded, and where the fundamental blocks are arranged in a rectangular platform with a length, in the direction parallel to the water-tubes, much larger than its wide;
• a large number of heat transfer bars made with a material of high thermal conductivity that hang in vertical position and whose upper end is embedded into the lower surface of the fundamental blocks, and where the heat transfer bar has an oval-shaped cross section when it is cut by a plane parallel to the platform, with its mayor axis, which is parallel to the water-tubes, much larger than its minor axis and such that the length of both axes decrease as the distance to the corresponding fundamental block increases;
• a horizontal tunnel of gases of large length, located beneath and all along the heat distributor, where the combustion gas is made to flow;
• a rectangular chamber, filled with an inert sealing gas, located all along the wide and the length of the tunel of gases, between the top of the tunnel of gases and the heat distributor.