US 12,703,638 B2 · Multi-stage ammonia-based decarbonization

Abstract

Multi-stage ammonia-based decarbonization, characterized in that ammonia is used as an absorbent to absorb CO2 in a process gas in an absorber, and the absorber may include four or more stages of absorption, where a first-stage absorption, a second-stage absorption, a third-stage absorption, a fourth-stage absorption, and higher-stage absorptions may be sequentially arranged along the flow direction of the process gas; and the temperature of the process gas in the second and third-stage absorptions may be controlled not to be lower than the temperature of the process gas in the first-stage absorption, and the temperature of the process gas in the fourth and any higher-stage absorptions may be controlled to be lower than the temperature of the process gas in the first-stage absorption.

Claims19

Dependent claims

A device for decarbonization, the device comprising:

a first-stage absorption vessel corresponding to a first-stage absorption;
a second-stage absorption vessel corresponding to a second-stage absorption;
a third-stage absorption vessel corresponding to a third-stage absorption;
a fourth-stage absorption vessel corresponding to a fourth-stage absorption;
and
a higher-stage absorption vessel corresponding to a higher-stage absorption;
an ammonia addition source that is configured to supply an ammonia absorbent to one or more of the vessels;
and
a temperature controller that is configured to control process gas temperatures:
in the second-and third-stage vessels to be not lower than a temperature of the process gas in the first-stage absorption vessel;
and
in the fourth-and higher-stage absorption vessels to be lower than a temperature of the process gas in the first-stage absorption.

9 more elements

Dependencies are inferred from the claim text.

Multi-stage ammonia-based decarbonization

Life of this patent

Multi-stage ammonia-based decarbonization

Life of this patent

Abstract

Claims19