Oxygen enrichment of cement kiln system combustion
AssigneeCemex, Inc.
InventorsHerman H. Tseng, Philip A. Alsop
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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.
Claims65
A method for improving combustion in a cement kiln system having a precalciner receiving a tertiary air stream, the method comprising enriching the tertiary air stream with oxygen.
A method for manufacturing cement clinker, the method comprising:
- preheating a feed material;
- precalcining the preheated feed material;
- supplying tertiary air to the precalciner;
- enriching the tertiary air with oxygen;
- and
- transforming the calcined feed material into clinker.
A method for enriching oxygen content during combustion in a cement kiln system including a precalciner, the method comprising:
- preheating a feed material;
- precalcining the preheated feed material;
- enriching the precalcination combustion with oxygen, including:
- drawing tertiary air from an air source including a clinker cooler;
- receiving oxygen from an oxygen source including at least one of a source of cryogenic oxygen and a vacuum swing adsorption installation;
- mixing the oxygen with the air such that oxygen will comprise up to 25% of the stochiometric requirement to combust the precalciner fuel when introduced;
- and
- introducing the oxygen enriched air into the precalciner;
- and
- transforming the calcined feed material into clinker.
An apparatus for improving combustion in a cement kiln system, the apparatus comprising:
- a precalciner;
- a tertiary air source;
- and
- an oxygen source coupled to the precalciner.
An apparatus for improving combustion in a cement kiln system, the apparatus comprising:
- a precalciner;
- means for introducing oxygen enriched tertiary air into the precalciner.
An apparatus for manufacturing cement, the apparatus comprising:
- a preheater;
- a precalciner coupled to the preheater;
- 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;
- means for introducing oxygen enriched air into the precalciner;
- a rotary kiln coupled to the precalciner;
- a source of primary air;
- a 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;
- 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;
- 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.
Dependencies are inferred from the claim text.