Patent ID: 9533906
Date: 2017-01-03
CPC Classifications: C03B,F23D,Y02E,Y10T

Claim:
1. A submerged combustion method comprising: a) flowing an oxidant into a primary annulus between inner and outer conduits of a concentric conduit submerged combustion burner; b) flowing a fuel to the inner conduit of the concentric conduit submerged combustion burner; c) flowing the oxidant through a plurality of non-central passages in an adjustable removable structure, and the fuel through a central passage in the adjustable removable structure, the adjustable removable structure comprising a body having an upper surface forming a constant angle α with the longitudinal axis, a lower surface, a circumferential surface abutting a portion of an internal surface of the outer conduit, the body including a circumferential lip extension extending away from the upper surface of the body and generally parallel to the longitudinal axis, and a generally cylindrical central hub concentric with a longitudinal axis of the inner conduit, the adjustable removable structure adjustable axially in relation to and removably attached to a first end of the inner conduit via the generally cylindrical central hub, the generally cylindrical central hub defining the central passage having an exit at the upper surface, the body comprising the plurality of non-central passages extending from the lower to the upper surface, the plurality of non-central passages configured such that flow of oxidant through the plurality of non-central passages causes the oxidant to intersect flow of the fuel in a mixing region above the upper surface of the body; d) flowing coolant through a secondary annulus external to the primary annulus, the secondary annulus formed by a third substantially concentric conduit comprising a first end, a second end, and an internal surface, the internal surface of the third conduit forming, with an exterior surface of the outer conduit, the secondary annulus, wherein the first end of the third substantially concentric conduit extends beyond a first end of the outer conduit, the first end of the outer conduit extends beyond the first end of the inner conduit, and the secondary annulus is capped by an end cap connecting the first end of the outer conduit and the first end of the third substantially concentric conduit, wherein the end cap is half-torus shaped, the half-torus having an inner diameter equal to an inner diameter of the circumferential lip extension of the body, the diameters configured so that the end cap does not obstruct flow of combustion products out of the burner.