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US 2018/0320890 A1Published application
Multiple Pass Flexible Water Tube Boiler
AssigneeEnglish Boiler, LLC
InventorsJohn R. English, Sundeep Bodapati
Life of this patent
Estimating the term…
Abstract
A package multiple pass flexible water tube boiler for converting water to steam. The boiler having an enclosure and diagonally offset upper and lower drums. The drums are connected by a series of staggered or offset water tubes. The water tubes comprise two sets of repeating tubes that are bent to substantially similar but not identical designs. The staggered tube arrangement optimizes heat transfer and minimizes the footprint of the unit.
Claims7
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 steam drum having its longitudinal axis proximate to the top of said second side wall;
- a cylindrical lower water drum having its longitudinal axis proximate to the bottom of said first side wall;
- offset boiler tubes 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;
- and,
- a combustion chamber defined by a portion of said boiler tubes.
7 more elements
A flexible water tube boiler comprising:
- an enclosure;
- a cylindrical upper steam drum;
- a cylindrical lower water drum;
- a plurality of offset water tubes connecting said upper steam 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
Dependencies are inferred from the claim text.