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US 2019/0017697 A1Published application
Multiple Pass Flexible Water Tube Boiler and Method of Using Same
AssigneeEnglish Boiler, LLC
InventorsJohn R. English, Sundeep Bodapati
Life of this patent
Estimating the term…
Abstract
A package multiple pass flexible water tube boiler having staggered tubes that are substantially identical in length. The staggered tube arrangement, along with the inclusion of a plurality of baffles, optimizes heat transfer and minimizes the footprint of the unit.
Claims8
A multiple-pass flexible water tube boiler comprising:
- an enclosure formed by a first side wall, a second side wall, a front wall, a rear wall, a top surface and a bottom surface;
- a cylindrical upper drum;
- a cylindrical lower drum;
- boiler tubes of essentially equal length connecting, and allowing communication between, said lower drum and said upper drum wherein said tubes comprise:
- (i) a first group of two water tubes being in the same plane and having a first tube exiting said lower drum extending laterally in a horizontal run toward said second wall then upward in a vertical run to an entrance in said upper drum, and a second tube exiting said lower drum and extending upward in a vertical run along said first side wall, then turning to execute one or more horizontal runs by extending horizontally along a longitudinal center line toward a side wall and then turning and running horizontally again and repeating until said second tube terminates at an entrance to said upper drum;
- and,
- (ii) a second group of two water tubes being in the same plane and having a third tube exiting said lower drum, extending laterally in a horizontal run toward said second wall, then upward in a vertical run to an entrance in the upper drum, and a fourth tube exiting said lower drum and extending upward in a vertical run along said first side wall, then turning to execute one or more horizontal runs by extending horizontally along a longitudinal center line toward a side wall and then turning and running horizontally again and repeating until said fourth tube terminates at an entrance to said upper drum, wherein said longitudinal center lines of said fourth tube during horizontal runs are essentially parallel to said longitudinal center lines of said second tube during horizontal runs but are offset in an upward direction;
- a combustion chamber defined by a portion of said boiler tubes;
- and,
- a convection section defined by a portion of said boiler tubes.
7 more elements
A flexible water tube boiler comprising:
- an enclosure;
- a cylindrical upper steam-water drum;
- a cylindrical lower water drum;
- a plurality of offset water tubes of substantially equal length connecting said upper steam-water drum with said lower water drum wherein said offset water tubes consist of repeating units of a first array and a second array of water tubes;
- and,
- a combustion chamber.
3 more elements
A method of operating a multiple-pass flexible water tube boiler comprising:
- providing a flexible tube boiler having an upper drum, a lower drum, a plurality of tubes of essentially equal length consisting of four different geometric designs which are mounted in a staggered arrangement along the long axis of said boiler and connect said upper and lower drums, a convection section defined by at least a portion of said tubes, and a combustion section defined by at least a portion of said tubes;
- and,
- generating hot flue gas which flows in a horizontal direction through said combustion section and flows through at least one cycle of flow in an upward direction and in a downward direction in said convection section before exiting the boiler.
Dependencies are inferred from the claim text.