Regeneration of Capture Medium
OwnerScott Alexander Hume, Agnieszka Magdalena Kuczynskainventors
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Abstract
An apparatus and method for the regeneration of absorbed gas rich capture medium such as an absorption solution and the recovery of absorbed gas therefrom, an apparatus and method for the removal and recovery of a target gas from a gas stream, and the use of the same for post combustion carbon capture on a thermal power plant are described. The apparatus and method make use of a regenerative heating process. The apparatus and method are distinctly characterized by the use of CRH steam as a source of thermal energy for the heating process.
Claims20
An apparatus for the regeneration of a capture medium rich in a captured target gas and the recovery of absorbed gas therefrom comprising:
- a containment structure defining a process volume;
- supply conduit to pass captured gas rich capture medium into the process volume;
- condensing heating means fluidly connected to the process volume to heat the gas rich capture medium and thereby cause captured gas to dissociate into a gas rich vapour phase;
- a vapour recompression system fluidly connected to the process volume to receive vapour output from the process volume and to compress the same;
- a compressed vapour supply conduit to supply output compressed vapour to the heating means as a source of thermal energy therefor;
- a secondary source of thermal energy for the heating means comprising, fluidly in series:
- a receiving conduit for receiving cold reheat (CRH) steam from a thermal power plant;
- a back pressure turbine disposed to drive the vapour compression system to extract work from and reduce the pressure of the cold reheat steam;
- a delivery conduit to deliver the resultant lower pressure steam to the heating means as a further source of thermal energy therefor.
A method of regeneration of capture medium rich in a captured target gas and recovery of captured gas therefrom comprising the steps of:
- heating a target gas rich capture medium and thereby causing captured gas to dissociate into a gas rich vapour phase;
- compressing the vapour phase and using the compressed vapour as a first source of thermal energy for heating the capture medium;
- additionally taking a supply of cold reheat (CRH) steam from a thermal power plant, extracting work therefrom by passing the cold reheat steam through a back pressure turbine so as to drive a compressor to compress the said vapour phase and reducing the pressure of the CRH steam, and using the resultant lower pressure steam as a further source of thermal energy for heating the capture medium.
Dependencies are inferred from the claim text.