Solid electrolyte system for use with furnaces
AssigneePraxair Technology, Inc.
InventorsRavi Prasad, Raymond Francis Drnevich, Homer Fay
Life of this patent
Estimating the term…
Abstract
A process for oxygen-enriching a first feed gas stream be fed into a furnace by utilizing an oxygen-enriched gas stream from a second feed gas stream, wherein the first feed gas stream is compressed and then heated prior to injection into the furnace. The second feed gas stream is separated using an ion transport module containing an ion transport membrane having a retentate side and a permeate side to produce an oxygen-depleted gas stream on the retentate side and the pure oxygen gas stream or the oxygen-enriched gas stream on the permeate side. The pure oxygen gas stream or the oxygen-enriched gas stream is added to the first feed gas stream at any location before the first feed gas stream enters the furnace.
Claims16
A process for oxygen-enriching a first feed gas stream containing elemental oxygen and at least one other gas to be fed into a furnace by utilizing a pure oxygen gas stream or an oxygen-enriched gas stream obtained from a second feed gas stream containing elemental oxygen and at least one other gas, the process comprising:
- compressing the first feed gas stream to produce a compressed first feed gas stream;
- separating the second feed gas stream using an ion transport module containing an ion transport membrane having a retentate side and a permeate side to produce an oxygen-depleted gas stream on the retentate side and the pure oxygen gas stream or the oxygen-enriched gas stream on the permeate side;
- heating at least the compressed first feed gas stream prior to injection into the furnace;
- and
- adding the pure oxygen gas stream or the oxygen-enriched gas stream to the first feed gas stream at any location before the first feed gas stream enters the furnace.
A process for oxygen-enriching a first air stream containing elemental oxygen and at least one other gas to be fed into a blast furnace by utilizing a pure oxygen gas stream or an oxygen-enriched gas stream from a second air stream containing elemental oxygen and at least one other gas, said process comprising:
- compressing the first air stream;
- adding a fuel gas stream to an oxygen-depleted gas stream and then combusting the resultant gas stream;
- heating the second air stream, which includes at least a portion of the compressed first air stream or a compressed oxygen-enriched air stream, by transferring heat to the second air stream from the pure oxygen gas stream or oxygen-enriched gas stream and the hot oxygen-depleted gas stream from which energy is also recovered using a power expander;
- further compressing the cooled pure oxygen gas stream or oxygen-enriched gas stream using a booster compressor;
- separating the heated second air stream using an ion transport module containing an ion transport membrane having a retentate side and a permeate side to produce the oxygen-depleted gas stream on the retentate side and the pure oxygen gas stream or the oxygen-enriched gas stream on the permeate side;
- and
- heating at least the compressed first air stream prior to injection into the blast furnace.
Dependencies are inferred from the claim text.