Submerged combustion vaporizer with low NOx
AssigneeFives North American Combustion, Inc.
InventorsMark C. Hannum, Thomas F. Robertson, John N. Newby, John J. Nowakowski
Life of this patent
Estimating the term…
Abstract
A submerged combustion vaporizer may include a premix burner with multiple integral mixers for forming premix and discharging the premix into the duct system that communicates the burner with the sparger tubes. The SCV may further include a NOx suppression system that injects a staged fuel stream into the exhaust in the duct system, and/or a NOx suppression system that mixes water with the premix.
Claims19
An apparatus comprising:
- heat exchanger tubing;
- a tank structure configured to contain a water bath for the heat exchanger tubing;
- a burner;
- a duct system that includes sparger tubes with outlet ports and is configured to convey exhaust from the burner to the sparger tubes;
- and
- a fuel delivery system configured to provide the burner with primary fuel, and including a staged fuel injector structure configured to inject a staged fuel stream into the exhaust in the duct system separately from the primary fuel at a location downstream of the burner.
An apparatus for use with heat exchanger tubing, a tank structure configured to contain a water bath for the heat exchanger tubing, a burner configured to receive primary fuel, and a duct system that includes sparger tubes with outlet ports and is configured to convey exhaust from the burner to the sparger tubes, the apparatus comprising:
- a staged fuel injector structure configured to inject a staged fuel stream into the exhaust in the duct system separately from the primary fuel at a location downstream of the burner;
- and
- a fuel delivery system including fuel lines and valves arranged to deliver fuel from a common source to both the burner and the staged fuel injector structure, whereby the primary fuel and the staged fuel stream include the same fuel from the common source.
An apparatus comprising:
- heat exchanger tubing;
- a tank structure configured to contain a water bath for the heat exchanger tubing;
- a duct system including sparger tubes with outlet ports arranged to discharge gas into a water bath in the tank structure;
- a premix burner including an oxidant plenum, mixer tubes with open inner ends in the oxidant plenum, and fuel conduits configured to direct fuel into the mixer tubes, with the mixer tubes having open outer ends arranged to discharge premix into the duct system;
- and
- a water injection system operatively associated with the premix burner to mix water into the premix;
- wherein the oxidant plenum is part of an oxidant flow path extending from a blower to the oxidant plenum and the mixer tubes, and the water injection system is configured to inject water into the oxidant flow path;
- and
- wherein the water injection system is configured to inject water into the oxidant flow path upstream of the oxidant plenum.
An apparatus comprising:
- heat exchanger tubing;
- a tank structure configured to contain a water bath for the heat exchanger tubing;
- a duct system including sparger tubes with outlet ports arranged to discharge gas into a water bath in the tank structure;
- a premix burner including an oxidant plenum, mixer tubes with open inner ends in the oxidant plenum, and fuel conduits configured to direct fuel into the mixer tubes, with the mixer tubes having open outer ends arranged to discharge premix into the duct system;
- and
- a water injection system operatively associated with the premix burner to mix water into the premix;
- wherein the oxidant plenum is part of an oxidant flow path extending from a blower to the oxidant plenum and the mixer tubes, and the water injection system is configured to inject water into the oxidant flow path;
- and
- wherein the water injection system is configured to inject water directly into the oxidant plenum.
Dependencies are inferred from the claim text.