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US 8,939,093 B2Granted
Boiler grate and a boiler
AssigneeValmet Power AB
InventorTimo Mero
Life of this patent
Estimating the term…
Abstract
A boiler grate including air channels for supplying primary air to a furnace of a boiler. At least one channel, which is open on top, is arranged to collect ash and material from the furnace. At least one removal element is arranged in the channel and to mechanically move ash and material along the channel. A boiler includes a grate, a furnace which is limited by the walls of the furnace and the grate, and an ash chute, which is arranged to remove ash and material from the furnace. The ash removal elements is arranged to move ash and material towards the air chute.
Claims16
A boiler, comprising:
- a furnace comprising walls and a grate, the grate comprising
- a set of air nozzles comprising air outlets and arranged to supply primary air into the furnace, and
- at least one channel arranged between the air nozzles and open on top, wherein the at least one channel is configured to collect ash and material from the furnace, and wherein the air outlets are arranged in an upper part of the at least one channel;
- an ash chute, which is arranged to remove ash and material from the furnace;
- at least one mechanized ash removal unit arranged in said at least one channel and configured to move ash and material along the at least one channel towards the ash chute, wherein the ash removal unit comprises a push bar discharger, a screw discharger, or a belt discharger;
- and
- a protective structure arranged between the at least one mechanized ash removal unit and the grate,
- wherein an angle of the grate in relation to a horizontal plane is less than 10 degrees.
5 more elements
A boiler, comprising:
- a furnace comprising walls and a grate, the grate comprising
- a set of air nozzles comprising air outlets and arranged to supply primary air into the furnace, and
- at least one channel arranged between the air nozzles and open on top, wherein the at least one channel is configured to collect ash and material from the furnace, and wherein the air outlets are arranged in an upper part of the at least one channel;
- an ash chute, which is arranged to remove ash and material from the furnace;
- at least one mechanized ash removal unit arranged in said at least one channel and configured to move ash and material along the at least one channel towards the ash chute, wherein the ash removal unit comprises a bar discharger, the bar discharger comprising
- a bar, which is arranged to move back and forth controlled by an actuator, and
- several scrapers attached to the bar, which scrapers are shaped so that they are arranged to push ash and material along the at least one channel towards the ash chute;
- and
- a protective structure arranged between the at least one mechanized ash removal unit and the grate,
- wherein an angle of the grate in relation to a horizontal plane is less than 10 degrees.
7 more elements
Dependencies are inferred from the claim text.