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US 7,069,867 B2Granted
Process for burning sulfur-containing fuels
AssigneeAmerican Air Liquide, Inc.
InventorsOvidiu Marin, Nicolas Perrin, Pavol Pranda
Life of this patent
Estimating the term…
Abstract
A process for burning a sulfur-containing fuel to produce a flue gas. The process includes introducing a sulfur-containing fuel into a combustion chamber, introducing an oxidant stream into the combustion chamber and mixing it with the sulfur-containing fuel to define a combustion zone, and introducing potassium carbonate into the combustion chamber. The sulfur-containing fuel is burned to produce the flue gas and potassium sulfate.
Claims25
A process for burning a sulfur-containing fuel to produce a flue gas, the process comprising:
- introducing sulfur-containing fuel into a combustion chamber:
- oxygen-enriching an oxidant stream;
- introducing the oxidant stream into the combustion chamber and mixing it with the sulfur-containing fuel to define a combustion zone;
- introducing potassium carbonate into the combustion chamber;
- and
- burning the sulfur-containing fuel to produce the flue gas and potassium sulfate, wherein the total oxygen content of the oxidant entering the combustion chamber exceeds 21% and the potassium carbonate is introduced into the combustion chamber in an amount sufficient to exceed the stoichiometric requirement needed to react with the sulfur in the fuel by between 0% and 50%.
3 more elements
A process for burning a sulfur-containing fuel to produce a flue gas, the process comprising:
- introducing a sulfur-containing fuel into a combustion chamber;
- oxygen-enriching an oxidant stream;
- introducing the oxidant stream into the combustion chamber and mixing it with the sulfur-containing fuel to define a combustion zone;
- introducing potassium carbonate into the combustion chamber;
- and
- burning the sulfur-containing fuel to produce the flue gas and potassium sulfate, wherein the total oxygen content of the oxidant entering the combustion chamber exceeds 21% and at least half of the sulfur in the sulfur-containing fuel is converted to potassium sulfate.
3 more elements
A process for burning a sulfur-containing fuel to produce a flue gss, the process comprising:
- introducing a sulfur-containing fuel into a combustion chamber at a fuel inlet;
- oxygen-enriching at least one-oxidant stream;
- introducing a primary oxidant, stream into the combustion chamber at a primary oxidant inlet positioned proximate to or coincident the fuel inlet and mixing it with the sulfur-containing fuel to define a first combustion zone;
- introducing a secondary oxidant stream into the combustion chamber at a secondary oxidant inlet positioned so that the secondary oxidant enters the combustion chamber in the primary combustion zone;
- introducing potassium carbonate into the combustion chamber, and
- burning the sulfur-containing fuel to produce the flue gas and potassium sulfate wherein the total oxygen content of the oxidant entering the combustion chamber exceeds 21% and the potassium carbonate is introduced into the combustion chamber in an amount sufficient to exceed the stoichiometric requirement needed to react with the sulfur in the fuel by between 0% and 50%.
3 more elements
A process for burning a sulfur-containing fuel to produce a flue gas, the process comprising:
- introducing a sulfur-containing fuel into a combustion chamber at a fuel inlet;
- oxygen-enriching at least one oxidant stream;
- introducing a primary oxidant stream into the combustion chamber at a primary oxidant inlet positioned proximate to or coincident the fuel inlet and mixing it with the sulfur-containing fuel to define a first combustion zone;
- introducing a secondary oxidant stream into the combustion chamber at a secondary oxidant inlet positioned so that the secondary oxidant enters the combustion chamber in the primary combustion zone;
- introducing potassium carbonate into the combustion chamber;
- and
- burning the sulfur-containing fuel to produce the flue gas and potassium sulfate wherein the total oxygen content of the oxidant entering the combustion chamber exceeds 21% and at least halt of the sulfur in the sulfur-containing fuel is converted to potassium sulfate.
4 more elements
A process for burning a sulfur-containing fuel to produce a flue gas, the process comprising:
- introducing a sulfur-containing fuel into a combustion chamber at a fuel inlet;
- oxygen-enriching at least one oxidant stream;
- introducing a primary oxidant stream into the combustion chamber at a primary oxidant inlet positioned proximate to or coincident the fuel inlet and mixing it with the sulfur-containing fuel to define a first combustion zone;
- introducing a secondary oxidant stream into the combustion chamber at a secondary oxidant inlet positioned so that the secondary oxidant enters the combustion chamber in the primary combustion zone;
- introducing a tertiary oxidant stream into the combustion chamber at a tertiary oxidant inlet positioned away from the primary oxidant inlet and away from the secondary oxidant inlet, the tertiary oxidant entering the combustion chamber to define a secondary combustion zone;
- introducing potassium carbonate into the combustion chamber, and
- burning the sulfur-containing fuel to produce the flue gas and potassium sulfate.
4 more elements
A process for burning a sulfur-containing fuel to produce a flue gas and ash, the process comprising:
- introducing a sulfur-containing fuel into a combustion chamber at a fuel inlet;
- introducing a primary oxidant stream containing more than 21% oxygen into the combustion chamber at a primary oxidant inlet positioned proximate to or coincident the fuel inlet and mixing it with the sulfur-containing fuel to define a first combustion zone;
- introducing a secondary oxidant stream containing more than 21% oxygen into the combustion chamber at a secondary oxidant inlet positioned so that the secondary oxidant enters the combustion chamber in the primary combustion zone;
- introducing a tertiary oxidant stream containing more than 21% oxygen into the combustion chamber at a tertiary oxidant inlet positioned away from the primary oxidant inlet and away from the secondary oxidant inlet, the tertiary oxidant entering the combustion chamber to define a secondary combustion zone;
- the total oxygen content of the oxidant entering The combustion chamber exceeding 21%;
- introducing potassium carbonate into the combustion chamber through the tertiary air inlet in an amount sufficient to exceed the stoichiometric requirement needed to react with the sulfur in the fuel by between 0% and 50%;
- and
- burning the sulfur-containing fuel to produce the flue gas and potassium sulfate;
- wherein at least half of the sulfur in the sulfur-containing fuel is converted to potassium sulfate.
6 more elements
A process for complying with environmental regulations requiring that ash produced by a combustion process contain not more than a predetermined level of carbon and that flue gas produced by the combustion process contain not more than a predetermined level of SOx, the process comprising the steps of:
- providing a combustion chamber subject to the environmental regulation;
- introducing a sulfur-containing fuel into a combustion chamber;
- oxygen-enriching an oxidant stream;
- introducing the oxidant stream into the combustion chamber and mixing it with the sulfur-containing fuel to define a combustion zone;
- introducing potassium carbonate into the combustion chamber;
- and
- burning the sulfur-containing fuel to produce the flue gas and potassium sulfate;
- determining a carbon content of the ash;
- and
- comparing the determined content to the predetermined level, wherein at least half of the sulfur in the sulfur-containing fuel is converted to potassium sulfate.
7 more elements
Dependencies are inferred from the claim text.