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US 6,213,031 B1Granted
Method of cooling a grate for a furnace and grate for a furnace
AssigneeAsea Brown Boveri AG
InventorsMax Künzli, John Millard, Peter Serck-Hanssen
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AssigneeAsea Brown Boveri AG
InventorsMax Künzli, John Millard, Peter Serck-Hanssen
Estimating the term…
To cool a grate having alternately fixed and movable rows (1, 1′) of grate bars (2), cooling liquid is sprayed into cavities (7), open at the bottom, of the grate bars (2) from spray tubes (10) situated in the underblast region (8) and in the process vaporizes essentially completely, so that the heat of vaporization is extracted from the grate bars (2). The angle sector (12) into which the cooling liquid is sprayed may be set in such a way that in each case only those sections of the grate bars (2) whose top sides form the free surface of the grate are sprayed. The cavities may also be closed except for a discharge opening leading into the underblast region and may be connected to a supply reservoir, in which the liquid is kept at a constant level, which is just below the discharge openings.
A method of cooling a grate in a furnace, comprising the steps of:
A grate for a furnace, having a plurality of successive rows of grate bars and a cooling-liquid feed, which in each case leads into a cavity of an individual grate bar or of a row of grate bars, wherein the cavity is in each case open in particular at the bottom to an underblast region wherein the grate bars are of single-walled design having cavities open essentially completely at the bottom, and the cooling-liquid feed is designed as a spray device arranged below the grate bars and having spray nozzles directed toward the undersides of the grate bars.
A grate for a furnace, having a plurality of successive rows of grate bars and a cooling-liquid feed, which in each case leads into a cavity of an individual grate bar or of a row of grate bars, wherein the cavity is in each case open in particular at the bottom to an underblast region wherein the grate bars are of a double-walled design, so that each grate bar contains a cavity into which a cooling-liquid feed opens and which has at least one discharge opening, which is open to the underblast region.
A grate for a furnace, comprising:
Dependencies are inferred from the claim text.