Apparatus for oxygen enrichment of cement kiln system
AssigneeCemex, Inc.
InventorsHerman H. Tseng, Philip A. Alsop
Life of this patent
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Abstract
The invention in its various embodiments includes an apparatus and a method for improving combustion in a cement kiln system. The apparatus in one embodiment includes a precalciner and an oxygen source coupled to the precalciner. The method in one embodiment includes introducing oxygen into the precalciner of a cement kiln system.
Claims39
An apparatus for improving the production of cement clinker in a cement kiln system, the apparatus comprising:
- a precalciner equipped with at least one burner;
- a tertiary air source;
- and
- an oxygen source coupled to the precalciner.
An apparatus for improving the production of cement clinker in a cement kiln system, the apparatus comprising:
- a precalciner equipped with at least one burner;
- and
- means for introducing oxygen into a tertiary air stream coupled to the precalciner.
An apparatus for manufacturing cement, the apparatus comprising:
- a preheater;
- a precalciner coupled to the preheater, said precalciner being equipped with at least one burner;
- an oxygen source coupled to the precalciner;
- a rotary kiln coupled to the precalciner;
- a clinker cooler coupled to the rotary kiln and to the precalciner.
An apparatus for manufacturing cement, the apparatus comprising:
- a preheater;
- a precalciner coupled to the preheater, said precalciner being equipped with at least one burner;
- an oxygen source including at least one of a source of cryogenic oxygen and a vacuum swing adsorption installation;
- a rotary kiln coupled to the precalciner;
- an air source including a clinker cooler coupled to the precalciner and to the rotary kiln;
- and
- a duct coupling the oxygen source to the precalciner and the air source to the precalciner and to the rotary kiln.
An apparatus for manufacturing cement, the apparatus comprising:
- a preheater;
- a precalciner coupled to the preheater, said precalciner being equipped with at least one burner;
- an oxygen source coupled to the precalciner, the oxygen source including at least one of a source of cryogenic oxygen and a vacuum swing adsorption installation;
- a rotary kiln coupled to the precalciner;
- and
- an air source including a clinker cooler coupled to the precalciner and to the rotary kiln.
A process of operating a kiln, comprising the steps of:
- providing a kiln including
- a kiln chamber, an inlet and a clinker outlet,
- a burner positioned so that its flame is directed into said kiln chamber, said burner including a fuel inlet, an oxidant inlet, and an outlet,
- a clinker cooler positioned to receive clinkers from said clinker outlet and including at least one air inlet into said clinker cooler, and
- an oxidant source in fluid communication with said at least one clinker cooler air inlet;
- wherein said oxidant source comprises a non-pure-air oxidant selected from the group consisting of pure oxygen and oxygen-enriched air;
- flowing oxidant from said oxidant source through said at least one clinker cooler air inlet;
- and
- flowing material to be calcined into said kiln chamber to form clinkers.
An kiln useful in producing clinkers, comprising:
- a kiln chamber having an inlet and a clinker outlet;
- a burner positioned so that its flame is directed into said kiln chamber, said burner including a fuel inlet, an oxidant inlet, and an outlet;
- a clinker cooler positioned to receive clinkers from said clinker outlet and including at least one air inlet into said clinker cooler;
- and
- an oxidant source in fluid communication with said at least one clinker cooler air inlet;
- wherein said oxidant source comprises a non-pure-air oxidant selected from the group consisting of pure oxygen and oxygen-enriched air.
Dependencies are inferred from the claim text.