US 2026/0185473 A1 · INJECTION GRID FOR EXHAUST DUCT

Abstract

A distribution system for injecting reductant into an exhaust duct of a power plant comprises a first injection grid comprising a first manifold and a first plurality of distribution branches, and a second injection grid comprising a second manifold and a second plurality of distribution branches, wherein the first plurality of distribution branches is interleaved with the second plurality of distribution branches, and the first plurality of distribution branches and the second plurality of distribution branches each receive reductant flow from their respective manifold in opposite directions. A method for injecting a reductant into an exhaust comprises generating a first mass flow gradient of reductant along a first axis, generating a second mass flow gradient of reductant along a second axis, wherein the mass flow gradients decrease in directions along their axes, wherein the first direction and the second direction are disposed in a counterflow arrangement.

Claims20

Dependent claims

A distribution system for injecting reductant into an exhaust duct of a thermal power plant, the distribution system comprising:

a first injection grid comprising:
a first manifold;
and
a first plurality of distribution branches extending from the first manifold;
and
a second injection grid comprising:
a second manifold;
and
a second plurality of distribution branches extending from the second manifold;
wherein the first plurality of distribution branches is interleaved with the second plurality of distribution branches along substantially their entire lengths to cover a cross-sectional area of a zone within the exhaust duct, and the first plurality of distribution branches and the second plurality of distribution branches are each configured to receive reductant flow from their respective manifold in opposite directions such that net reductant distribution across a width of the zone between the first manifold and the second manifold is substantially even.

7 more elements

A distribution system for injecting a reductant into a zone of an exhaust duct of a power plant, the distribution system comprising:

a header located in the exhaust duct to extend across the zone;
a first manifold extending from the header at a first side of the zone at a first end of the header;
a second manifold extending from the header at a second side of the zone at a second end of the header;
a first distribution branch extending from the first manifold from the first side to the second side;
and
a second distribution branch extending from the second manifold from the second side to the first side.

3 more elements

Dependencies are inferred from the claim text.

Injection grid for exhaust duct

Life of this patent

Injection grid for exhaust duct

Life of this patent

Abstract

Claims20