Exhaust gas treatment system with carbon dioxide chemical absorption equipment
View Patent ↗An object of the present invention is to provide an exhaust gas treatment system that effectively use heat recovered from an exhaust gas without any limitation in a CO 2 chemical absorption equipment that requires enormous heat energy, and thus enabling reduction in running cost of the CO 2 chemical absorption equipment. Disclosed is an exhaust gas treatment system with a CO 2 chemical absorption equipment, which is provided with a heat recovery device that recovers exhaust heat from an exhaust gas discharged from a boiler; and a CO 2 chemical absorption equipment that absorbs CO 2 in the exhaust gas by bringing the exhaust gas into contact with an amine absorbing solution in a carbon dioxide (CO 2 ) absorption column, heats the absorbing solution that have absorbed CO 2 thereby releasing CO 2 into a CO 2 regeneration column, heats the absorbing solution after release of CO 2 via a reboiler, and then circulates the absorbing solution in a CO 2 absorption column; the exhaust gas treatment system comprising a heat exchange unit that applies heat recovered by the heat recovery device to the absorbing solution that is delivered to the reboiler from the CO 2 regeneration column of the CO 2 chemical absorption equipment.
1. An exhaust gas treatment system comprising:
a CO 2 chemical absorption equipment comprising a CO 2 absorption column in which an absorbing solution contacts an exhaust gas discharged from a boiler to absorb CO 2 contained in the exhaust gas, and a CO 2 regeneration column in which the absorbing solution that has absorbed CO 2 is heated to release CO 2 from the absorbing solution, and wherein the absorbing solution after release of CO 2 is delivered from the CO 2 regeneration column to the CO 2 absorption column;
a heat recovery device for recovering heat from the exhaust gas;
a heat exchange unit for giving the heat recovered by the heat recovery device to the absorbing solution after release of CO 2 is delivered from the CO 2 regeneration column; and
a reboiler for heating the absorbing solution delivered from the heat exchange unit.
2. The system according to claim 1 , wherein the heat exchange unit comprises a heat exchanger equipped in a piping from the CO 2 regeneration column to the reboiler and a circulation unit of a heating medium that communicates between the heat exchanger and the heat recovery device.
3. The system according to claim 1 , wherein the reboiler uses steam for heating.
4. The system according to claim 1 , wherein the reboiler comprises a heat-transfer tube wherein steam passes through the heat-transfer tube.
5. The system according to claim 1 , wherein the absorbing solution comprises an amine.
6. An exhaust gas treatment system comprising:
a CO 2 chemical absorption equipment comprising a CO 2 absorption column in which an absorbing solution contacts an exhaust gas discharged from a boiler to absorb CO 2 contained in the exhaust gas, and a CO 2 regeneration column in which the absorbing solution that has absorbed CO 2 is heated to release CO 2 from the absorbing solution, and wherein the absorbing solution after release of CO 2 is delivered from the CO 2 regeneration column to the CO 2 absorption column;
a heat recovery device for recovering heat from the exhaust gas and giving the recovered heat to the absorbing solution after release of CO 2 , wherein the absorbing solution after release of CO 2 is delivered from the CO 2 regeneration column; and
a reboiler for heating the absorbing solution delivered from the heat recovery device.
7. The system according to claim 6 , wherein the reboiler uses steam for heating.
8. The system according to claim 6 , wherein the reboiler comprises a heat-transfer tube and wherein steam passes through the heat-transfer tube.
9. The system according to claim 6 , wherein the absorbing solution comprises an amine.