METHOD OF DEACIDIZING A GASEOUS EFFLUENT BY AN ABSORBENT SOLUTION WITH VAPOR INJECTION INTO THE REGENERATED ABSORBENT SOLUTION AND DEVICE FOR IMPLEMENTING SAME
First Claim
16. ) A method of deacidizing a gaseous effluent containing acid compounds, comprising:
- a) contacting the gaseous effluent with an absorbent solution in an absorption column to obtain a gaseous effluent depleted of acid compounds and an absorbent solution laden with acid compounds, the absorbent solution forming two separable liquid phases when an amount of acid compounds have been absorbed and is heated;
b) separating the absorbent solution laden with acid compounds into a first liquid fraction depleted of acid compounds and a second liquid fraction enriched with acid compounds;
c) regenerating the second liquid fraction in a regeneration column to release part of the acid compounds and to obtain a regenerated absorbent solution, by injecting vapor resulting from a partial vaporization in a reboiler of a first part of the regenerated absorbent solution withdrawn from the regeneration column, the vapor injection being in a liquid reserve including a second part of the regenerated absorbent solution located in a bottom of the regeneration column to provide stirring of the second part of the regenerated absorbent solution; and
d) recycling the first liquid fraction obtained in b) and the regenerated absorbent solution obtained in c) as the absorbent solution to in a).
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Accused Products
Abstract
The invention is a method for deacidizing a gaseous effluent comprising acid compounds, such as CO2 and/or H2S, and a device for implementing the method, through contact with a demixing absorbent solution. Regeneration is performed by vapor injection into the liquid guard (202) formed by the regenerated absorbent solution in the bottom of regeneration column (G). The vapor is generated within a reboiler (203) from a fraction of the regenerated absorbent solution withdrawn from the regeneration column. Vapor injection enables convective movement of the liquid for preventing any decantation phenomenon in the bottom of the regeneration column bottom which is harmful to the smooth operation of the deacidizing process.
4 Citations
50 Claims
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16. ) A method of deacidizing a gaseous effluent containing acid compounds, comprising:
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a) contacting the gaseous effluent with an absorbent solution in an absorption column to obtain a gaseous effluent depleted of acid compounds and an absorbent solution laden with acid compounds, the absorbent solution forming two separable liquid phases when an amount of acid compounds have been absorbed and is heated; b) separating the absorbent solution laden with acid compounds into a first liquid fraction depleted of acid compounds and a second liquid fraction enriched with acid compounds; c) regenerating the second liquid fraction in a regeneration column to release part of the acid compounds and to obtain a regenerated absorbent solution, by injecting vapor resulting from a partial vaporization in a reboiler of a first part of the regenerated absorbent solution withdrawn from the regeneration column, the vapor injection being in a liquid reserve including a second part of the regenerated absorbent solution located in a bottom of the regeneration column to provide stirring of the second part of the regenerated absorbent solution; and d) recycling the first liquid fraction obtained in b) and the regenerated absorbent solution obtained in c) as the absorbent solution to in a). - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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27. ) A method as claimed in 20, wherein the vapor is injected into the liquid reserve at a superficial velocity and the superficial velocity is controlled by separating the partly vaporized absorbent solution from the reboiler into a first stream forming the vapor injected into the liquid reserve and into a second vapor stream injected above the liquid reserve, and by controlling the first and second streams.
Specification