Process for the partial combustion of cellulose spent liquor using twin fluid nozzle burner
AssigneeChemrec Aktiebolag
InventorLars Stigsson
Life of this patent
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Abstract
The present invention is directed to a process for efficient combustion of cellulose spent liquors using a burner connected to a reactor, while supplying an oxygen containing gas, which invention is characterized in that more than 80% of the oxygen which is required for the partial combustion of the spent liquor is supplied through the lance of the burner to the reactor as an oxygen containing gas at a stoichiometric ratio of between 0.3 and 0.6 relative to complete combustion of the spent liquor.
Claims18
Process for partial combustion of cellulose spent liquors in a reactor equipped with a burner comprising a liquor lance and an atomizing nozzle having a downstream front side, said process comprising:
- (a) feeding, separately of each other, an oxygen containing gas and spent liquor through said lance to said atomizing nozzle,
- (b) atomizing the spent liquor by contacting it with said oxygen containing gas for forming a spray of atomized spent liquor emanating from the nozzle to sustain a flame in the reactor,
- wherein said oxygen containing gas comprises more than 80% of the oxygen required for the partial combustion, said oxygen required for partial combustion being supplied to the reactor at a stoichiometric ratio of from 0.3 to 0.6 relative to the oxygen needed for complete combustion of the spent liquor.
Process for partial combustion of cellulose spent liquors in a reactor equipped with a burner comprising a liquor lance and a symmetric atomizing nozzle having a downstream front side, said process comprising:
- (a) feeding, separately of each other, an oxygen containing gas and hot spent liquor through said lance to said atomizing nozzle, the spent liquor having a temperature above 100.degree. C.,
- (b) atomizing the spent liquor by contacting it with said oxygen containing gas for forming a spray of atomized spent liquor emanating from the nozzle to sustain a flame in the reactor,
- wherein the oxygen in the oxygen containing gas comprises more than 80% of the oxygen required for the partial combustion, said oxygen required for partial combustion being supplied to the reactor at a stoichiometric ratio of from 0.3 to 0.6 relative to the oxygen needed for complete combustion of the spent liquor.
Dependencies are inferred from the claim text.