Self-cleaning liner
AssigneeCool Water Coal Gasification Program
InventorsRussell B. Covell, Andrew F. Kwasnik
Life of this patent
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Abstract
A self-cleaning liner for high pressure boilers. The self-cleaning liner comprising a tubular liner and a sprayhead assembly. To minimize thermal shock, the sprayhead assembly protrudes into a cavity created by the formation of a bump in the tubular liner, shielding the sprayhead assembly from high temperatures. The sprayhead assembly may also incorporate a thermal sleeve to decrease thermal shock caused by the temperature difference between the sprayhead assembly and the cleaning medium.
Claims13
A self-cleaning liner comprising a tubular liner having tubular liner tubes for transporting a heat exchange medium which are joined together to form a continuous surface and a sprayhead assembly, wherein one of said tubular liner tubes is bent to form a bump in said tubular liner, said bump extending into the interior of the area defined by said tubular liner tubes creating a cavity between itself and said tubular liner;
- and said sprayhead assembly is disposed within said cavity directly behind said bump, oriented such that it can spray a fluid on the interior of said continuous surface formed by said tubular liner tubes.
A self-cleaning liner comprising a tubular liner having tubular liner tubes for transporting a heat exchange medium which are joined together to form a continuous surface;
- at least one sprayhead assembly;
- a waterwall;
- and, a refractory material;
- wherein said waterwall comprises two of said tubular liner tubes bent to form a bump in said tubular liner, said bump extending into the interior of the area defined by said tubular liner tubes creating a cavity between said waterwall and said tubular liner;
- said sprayhead assembly protruding into the cavity directly behind said waterwall;
- said refractory material filling the cavity between said waterwall and said tubular liner surrounding said sprayhead assembly and secured to said tubular liner through a securing means;
- and said sprayhead assembly comprises a body;
- a thermal sleeve inserted inside said body;
- at least one nozzle extending through said body and sealably attached thereto;
- a support member for mounting said body to said tubular liner, and a web member attached to said body and said tubular liner, creating a gastight seal.
A self-cleaning liner comprising a tubular liner comprised of tubular liner tubes;
- an upper sprayhead assembly and a lower sprayhead assembly;
- a waterwall;
- and, a refractory material;
- wherein said waterwall comprises a first set of tubular liner tubes including two of said tubular liner tubes bent to form a bump in said tubular liner creating a cavity between said first set of liner tubes and said tubular liner;
- said upper and lower sprayhead assemblies protrude into the cavity directly behind said waterwall;
- said refractory material is initially in a plastic state and fills the cavity between said waterwall and said tubular liner, surrounds said upper and lower sprayhead assemblies, and is secured to said tubular liner by at least one angled rod;
- said upper and lower sprayhead assemblies comprising a body;
- a thermal sleeve inserted inside said body;
- at least one nozzle extending through said body and sealably attached thereto;
- a support member for mounting said body to said tubular liner, wherein said body comprises a tube and an end cap, said tube having a first and a second end, said end cap attached to said first end of said tube;
- and said second end of said tube is attached to a supply header and a web member is attached to said body and the tubular liner, creating a gastight seal.
Dependencies are inferred from the claim text.