Method for treating residue gases proceeding from sulphur removing units and plants for carrying out the said method
AssigneeCompagnie Francaise d'Etudes et de Construction "Technip"
InventorsJoelle Castel, Christian Legrand
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Abstract
This invention relates to a method for treating residue gases proceeding from units applying the Claus reaction for the removal of sulphur and having been subjected to a conversion of the sulphur compounds into sulphuretted hydrogen. This method consists in that, prior to absorption of the sulphuretted hydrogen by a selective solvent in aqueous solution, the gases to be treated are cooled to a temperature so selected as to condense the water contained in the gases to form an aqueous effluent which is thereafter injected into the circuit of the selective solvent.
Claims13
In a method for treating gases containing hydrogen sulphide, comprising the steps of effecting an absorption of hydrogen sulphide with a selective solvent in aqueous solution and of regenerating the said solvent before recycling it to said absorption, the improvement of cooling the gases to be treated prior to said absorption so as to condense the water contained in said gases, separating said gases from the condensed water and to form an aqueous effluent, injecting said aqueous effluent into said selective solvent at a point separate from said absorption step in order that at least a portion of the water of the solvent admitted to absorption can be controllably evaporated and carried along with said gases during absorption so as to avoid any rejection of liquid water after absorption.
Dependencies are inferred from the claim text.