Continuous vertical-to-angular tube transitions

A steam generator system comprising:

• a first series of tubes extending substantially vertically to form a portion of a lower wall of a furnace;
• a second series of tubes extending substantially vertically to form a portion of an upper wall of said furnace;
• a third series of tubes extending substantially vertically in said lower wall to form a portion of said lower wall, substantially angularly to form an intermediate wall of said furnace, and substantially vertically in said upper wall to form a portion of said upper wall;
• said third series of tubes being in a substantially interlaced, coplanar and parallel relationship with said first series of tubes in said lower wall and with said second series of tubes in said upper wall;
• means for passing fluid through said tubes to apply heat to said fluid;
• and
• a heat recovery area having a short aperture sidewall buffer in fluid communication with said third series of tubes.

A steam generator system comprising:

• an upright furnace section having boundary walls formed by a plurality of tubes;
• a first series of said tubes extending substantially vertically in the lower portion of said walls;
• a second series of said tubes extending substantially vertically in the upper portion of said walls;
• a third series of said tubes extending substantially vertically in said lower wall portion, substantially angularly in the intermediate portion of said walls, and substantially vertically in said upper wall portion;
• said third series of tubes being in a substantially interlaced, coplanar, and parallel relationship with said first series of tubes in said lower wall portion and with said second series of tubes in said upper wall portion;
• means for passing fluid through said tubes to apply heat generated in said furnace to said fluid;
• a superheating section,
• fluid separating means for receiving fluid from said furnace during startup and full load operation of said system and separating said fluid into a liquid and a vapor;
• and
• fluid flow circuitry for passing the vapor from said fluid separating means to said superheating section during startup and full load operation of said system.

A steam generator system comprising:

• an upright furnace section having boundary walls formed by a plurality of tubes;
• a first series of said tubes extending substantially vertically in the lower portion of said walls;
• a second series of said tubes extending substantially vertically in the upper portion of said walls;
• a third series of said tubes extending substantially vertically in said lower wall portion, substantially angularly in the intermediate portion of said walls, and substantially vertically in said upper wall portion;
• said third series of tubes being in a substantially interlaced, coplanar, and parallel relationship with said first series of tubes in said lower wall portion and with said second series of tubes in said upper wall portion;
• means for passing fluid through said tubes to apply heat generated in said furnace to said fluid;
• and
• a heat recovery area having a short aperture sidewall buffer for receiving fluid from said third series of tubes.

A steam generator system comprising:

• an upright furnace section having boundary walls formed by a plurality of tubes, said walls being arranged into a lower section, an intermediate section, and an upper section, said plurality of tubes being apportioned into a first series of tubes, a second series of tubes, and a third series of tubes, said first and third series of tubes extending substantially vertically,
• each of said tubes in said second series of tubes having, in adjoining order, a first portion extending substantially vertically, a first bend portion, a portion extending at an acute angle with reference to a horizontal plane, a second bend portion, and a second portion extending substantially vertically, each of said tubes in said second series of tubes thus forming substantially a single, continuous, smooth, fluid flow passage extending the entire length of said furnace section,
• said lower section of said walls comprising said first series of said tubes extending in a substantially interlaced, coplanar, parallel relationship with said first vertical portions of said second series of said tubes,
• said intermediate section of said walls comprising said angular portions of said second series of said tubes, and
• said upper section of said walls comprising said third series of said tubes extending in a substantially interlaced, coplanar, parallel relationship with said second vertical portions of said second series of said tubes;
• means for passing fluid through said first series of said tubes, then through said second series of said tubes, and then through said third series of said tubes;
• a superheating section,
• fluid separating means for receiving fluid from said furnace during startup and full load operation of said system and separating said fluid into a liquid and a vapor;
• and
• fluid flow circuitry for passing the vapor from said fluid separating means to said superheating section during startup and full load operation of said system;
• and
• a heat recovery area having a short aperture sidewall buffer, said buffer receiving fluid from said second series of tubes.

A steam generator system comprising:

• a first series of tubes extending substantially vertically to form a portion of at least one lower wall of a furnace;
• a second series of tubes extending substantially vertically to form a portion of at least one upper wall of said furnace;
• a third series of tubes extending substantially vertically in said lower wall and said upper wall to respectively form the remaining portions of said lower wall and said upper wall, said third series of tubes extending substantially angularly between their respective vertically-extending portions to form an intermediate wall of said furnace;
• means for passing fluid through said tubes to apply heat to said fluid;
• a superheating section;
• fluid separating means for receiving fluid from said furnace during startup and full load operation of said system and separating said fluid into a liquid and a vapor, and fluid flow circuitry for passing the vapor from said fluid separating means to said superheating section during startup and full load operation of said system.

A steam generator system comprising:

• a first series of tubes extending substantially vertically to form a portion of at least one lower wall of a furnace;
• a second series of tubes extending substantially vertically to form a portion of at least one upper wall of said furnace;
• a third series of tubes extending substantially vertically in said lower wall and said upper wall to respectively form the remaining portions of said lower wall and said upper wall, said third series of tubes extending substantially angularly between their respective vertically-extending portions to form an intermediate wall of said furnace;
• means for passing fluid through said tubes to apply heat to said fluid;
• and
• a heat recovery area having a short aperture sidewall buffer in fluid communication with said third series of tubes.