Carbon dioxide chemical absorption system installed with vapor recompression equipment
View Patent ↗An exhaust gas treatment system comprising: a CO 2 chemical absorption equipment comprising an absorption column which absorbs carbon dioxide (CO 2 ) in a combustion exhaust gas discharged from a combustion device with the use of an absorbing solution comprising an amine compound as a main component and a regeneration column which regenerates the absorbing solution by desorbing CO 2 from the absorbing solution which absorbed CO 2 ; a flash tank which depressurizes the absorbing solution withdrawn from a lower part of the regeneration column to flash-evaporate the absorbing solution; a vapor recompression equipment which compresses the vapor generated by the flash tank; a temperature control device which adjusts the vapor compressed by the vapor recompression equipment to be within a predetermined temperature; and a piping for feeding the vapor adjusted to the predetermined temperature by the temperature control device to the regeneration column.
1. An exhaust gas treatment system comprising:
a CO 2 chemical absorption equipment comprising an absorption column which absorbs carbon dioxide (CO 2 ) in a combustion exhaust gas discharged from a combustion device with the use of an absorbing solution comprising an amine compound as a main component and a regeneration column which regenerates the absorbing solution by desorbing CO 2 from the absorbing solution which absorbed CO 2 ;
a flash tank which depressurizes the absorbing solution withdrawn from a lower part of the regeneration column to flash-evaporate the absorbing solution;
a vapor recompression equipment which compresses a vapor generated by the flash tank;
a temperature control device which adjusts a vapor compressed by the vapor recompression equipment to be within a predetermined temperature; a piping for feeding the vapor adjusted to the predetermined temperature by the temperature control device to the regeneration column; and
a piping which feeds to the temperature control device a part of the absorbing solution withdrawn from a lower part of the flash tank as a coolant.
2. The exhaust gas treatment system according to claim 1 , wherein the temperature control device comprises a cooler which is capable of cooling the compressed vapor by directly spraying the coolant to the compressed vapor or a heat exchanger which is capable of cooling the compressed vapor by heat exchange between the compressed vapor and the coolant.
3. An exhaust gas treatment system comprising:
a CO 2 chemical absorption equipment comprising an absorption column which absorbs carbon dioxide (CO 2 ) in a combustion exhaust gas discharged from a combustion device with the use of an absorbing solution comprising an amine compound as a main component and a regeneration column which regenerates the absorbing solution by desorbing CO 2 from the absorbing solution which absorbed CO 2 ;
a flash tank which depressurizes the absorbing solution withdrawn from a lower part of the regeneration column to flash-evaporate the absorbing solution;
a vapor recompression equipment which compresses a vapor generated by the flash tank;
a temperature control device which adjusts a vapor compressed by the vapor recompression equipment to be within a predetermined temperature;
a piping for feeding the vapor adjusted to the predetermined temperature by the temperature control device to the regeneration column; and
a piping which feeds to the temperature control device a part of the absorbing solution withdrawn from the lower part of the regeneration column as a coolant.
4. The exhaust gas treatment system according to claim 3 , wherein the temperature control device adjusts the temperature of the compressed vapor by using the coolant.
5. The exhaust gas treatment system according to claim 3 , wherein the temperature control device comprises a cooler which is capable of cooling the compressed vapor by directly spraying the coolant to the compressed vapor or a heat exchanger which is capable of cooling the compressed vapor by heat exchange between the compressed vapor and the coolant.
6. A carbon dioxide chemical absorption system comprising:
a CO 2 chemical absorption equipment comprising an absorption column which absorbs carbon dioxide (CO 2 ) in a carbon dioxide-containing gas with the use of an absorbing solution comprising an amine compound as a main component and a regeneration column which regenerates the absorbing solution by desorbing CO 2 from
the absorbing solution which absorbed CO 2 ;
a flash tank which depressurizes the absorbing solution withdrawn from a lower part of the regeneration column to flash-evaporate the absorbing solution;
a vapor recompression equipment which compresses a vapor generated by the flash tank;
a temperature control device which adjusts a vapor compressed by the vapor recompression equipment to be within a predetermined temperature; a piping for feeding a vapor adjusted to the predetermined temperature by the temperature control device to the regeneration column; and
a piping which feeds to the temperature control device a part of the absorbing solution withdrawn from a lower part of the flash tank as a coolant.
7. The exhaust gas treatment system according to claim 6 , wherein the temperature control device comprises a cooler which is capable of cooling the vapor by directly spraying the coolant to the compressed vapor or a heat exchanger which is capable of cooling the compressed vapor by heat exchange between the compressed vapor and the coolant.