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.
Claims21
An apparatus comprising:
- a tank structure configured to contain a water bath;
- a duct system including sparger tubes with outlet ports arranged to discharge gas into a water bath in the tank structure;
- and
- 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 that are configured as exit openings from the premix burner and are arranged to discharge premix from the premix burner directly into the duct system.
A method of retrofitting an apparatus including a tank structure configured to contain a water bath, and a duct system including sparger tubes with outlet ports arranged to discharge gas into a water bath in the tank structure, the method comprising:
- installing 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 that are configured as exit openings from the premix burner and are open into the duct system to discharge premix from the premix burner directly into the duct system.
An apparatus comprising:
- a tank structure configured to contain a water bath;
- 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 at a location upstream of the open outer ends of the mixer tubes.
A method of retrofitting an apparatus including a tank structure configured to contain a water bath, and a duct system including sparger tubes with outlet ports arranged to discharge gas into a water bath in the tank structure, the method comprising:
- installing 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 that are open into the duct system to discharge premix into the duct system;
- and
- installing a water injection system operatively associated with the premix burner to mix water into the premix at a location upstream of the open outer ends of the mixer tubes.
Dependencies are inferred from the claim text.