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US 6,253,715 B1Granted
Water-tube boiler
AssigneesMiura Co., Ltd., Miura Institute of Research & Development Co., Ltd.
InventorsNoboru Takubo, Takanori Tanaka
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Abstract
A water-tube boiler which allows further NOx reduction and CO reduction to be implemented with an uncomplicated construction of the boiler body itself, and which is improved in boiler efficiency. The water-tube boiler includes a first water tube array made up of a plurality of first water tubes arranged into an annular shape and a combustion chamber inside the first water tube array.
Claims7
A water-tube comprising:
- a first water tube array made up of a plurality of first water tubes arranged into an annular shape;
- a combustion chamber defined inside the first water tube array;
- a first opening defined at part of the first water tube array;
- a cooling water tube array made up of a plurality of cooling water tubes arranged into an annular shape in a zone within the combustion chamber where burning-reaction ongoing gas is present;
- gaps provided between adjacent cooling water tubes so as to permit the burning-reaction ongoing gas to flow through;
- a burning-reaction continuing zone, where burning reaction is continuously effected, provided between the cooling water tube array and the first water tube array;
- a second water tube array made up of a plurality of second water tubes arranged into an annular shape outside the first water tube array;
- a second opening defined at part of the second water tube array;
- and
- a gas flow passage provided between the first water tube array and the second water tube array.
7 more elements
Dependencies are inferred from the claim text.