US 6,712,606 B2 · Combustion optimization

Abstract

The present invention relates to a method and a device for reducing emission from a combustion or gasification plant, said plant having an combustion chamber housing means for insertion of a first fluid into said chamber, introduction of said fluid into said chamber being effective to reduce the emission of at least one substance from said combustion and said fluid having an optimal operating temperature range for which emissions are particularly low. The temperature is established in a volume in said combustion chamber, where said volume includes the position for insertion of said first fluid. A second fluid is inserted into said combustion chamber and is effective to reduce the temperature in said volume in said combustion chamber, if said temperature is established to be higher than said optimal temperature range. A third fluid is inserted into said combustion chamber and is effective to increase the temperature in said volume in said combustion chamber, if said temperature is established to be lower than said optimal temperature range.

Claims34

Dependent claims

A method for reducing emissions from a combustion or gasification plant, said plant having a combustion chamber housing means for insertion of a first fluid into said chamber, introduction of said first fluid into said chamber being effective to reduce the emission of at least one substance from said combustion and said first fluid having an optimal operating temperature range for which emissions are particularly low, characterised in that said method comprises the steps of,

establishing the temperature in a volume in said combustion chamber, where said volume includes the position for insertion of said first fluid,
inserting into said combustion chamber a second fluid effective to reduce the temperature in said volume in said combustion chamber, if said temperature is established to be higher than said optimal temperature range, and
inserting into said combustion chamber a third fluid effective to increase the temperature in said volume in said combustion chamber, if said temperature is established to be lower than said optimal temperature range.

A device for reducing the emission of at least one substance from a combustion or gasification plant by means of supplying a first fluid for optimising flue gas or gas parameters, said first fluid being effective to reduce the emission of said at least one substance and having a optimal operating temperature range, said plant comprising a combustion or gasification chamber having a supplier for supplying at least said first fluid to said chamber, comprising:

means for controlling the temperature in said combustion chamber, in at least a volume comprising the position of insertion of said first fluid into said chamber, to be in said optimal operating temperature range, wherein:
said first fluid is selected from a group of fluids including NOx reducing agents or HCl reducing agents;
and
said first fluid is ammonia aqua or ammonia gas and said tube comprises means for supplying compressed air into a cavity of said tube, means for supplying water into said cavity and that said tube comprises orifices through which said water and compressed air ejects into said combustion chamber to lower the temperature in said volume if said temperature is above said optimal operating temperature range and to disturb the flow of the flue gas in said combustion chamber to create swirls, change the flow pattern and improve the mixing in said combustion chamber.

1 more element

Dependencies are inferred from the claim text.

Combustion optimization

Life of this patent

Combustion optimization

Life of this patent

Abstract

Claims34