Heat recovery system of the boiler with CO
A boiler system including an electric power generation system having a boiler, a steam turbine for generating electric power by steams which received heat at a boiler, a condenser provided at the downstream thereof for condensing the steams, and a heater for heating condensed water by steams extracted from the steam turbine and, further, a CO 2 capture system of sorbing and capturing a CO 2 gas in an exhausted gas exhausted from the boiler by using a solid CO 2 sorbent, and a chimney of exhausting an exhaust gas in the CO 2 capture system after recovery of CO 2 or an exhaust gas exhausted from the boiler, in which the temperature of a fluid concerned with the boiler system is increased by using the exhaust gas exhausted from the CO 2 capture system.
1. A boiler system comprising:
an electric power generation system including:
a boiler;
a steam turbine which generates electric power by steam heated at the boiler;
a condenser downstream thereof for condensing the steam; and
a heater which heats condensed water by steam extracted from the steam turbine; and further
a CO 2 capture system which sorbs and captures a CO 2 gas in an exhaust gas exhausted from the boiler by using a solid CO 2 sorbent; and
a chimney which exhausts exhaust gas after recovery of CO 2 in the CO 2 capture system or exhausted from the boiler,
wherein the system has a device for increasing a temperature of fluid for the boiler system by using exhaust gas exhausted from the CO 2 capture system,
wherein the device for increasing the temperature of the fluid is a device in which the fluid contains the exhaust gas exhausted from the CO 2 capture system, and
wherein the fluid for the boiler system is either a gas flowing into the boiler or an exhaust gas flowing into the chimney.
2. The boiler system according to claim 1 , wherein the fluid for the boiler system is a gas flowing into the boiler, and the gas flowing into the boiler is further heated by an air heater upstream of the boiler.
3. The boiler system according to claim 1 , wherein the fluid is an exhaust gas flowing into the chimney, wherein the exhaust gas exhausted from the CO 2 capture system is a gas exhausted during CO 2 sorbing, CO 2 purging, process or column cooling.
4. The boiler system according to claim 3 , wherein the device for increasing the temperature of the fluid is a device at least partially using the exhaust gas exhausted from the CO 2 capture system as the gas flowing into the boiler.
5. The boiler system according to claim 1 , wherein the device for increasing the temperature of the fluid is a system in which the exhaust gas flowing into the chimney contains the exhaust gas exhausted from the CO 2 capture system.
6. The boiler system according to claim 1 , wherein the CO 2 capture system includes a CO 2 sorption column into which at least one of the exhaust gas exhausted from the boiler, the CO 2 gas, steam, and air is introduced.
7. The boiler system according to claim 1 , wherein the CO 2 capture system includes plural CO 2 sorption columns arranged so that a gas flowing out of one of the CO 2 sorption columns is caused to flow into another of the CO 2 sorption columns.
8. The boiler system according to claim 1 , wherein a solid CO 2 sorbent used for the CO 2 capture system contains Ce.
9. The boiler system according to claim 1 , wherein the exhaust gas exhausted from the CO 2 capture system is a gas exhausted at any of a CO 2 capturing step, a CO 2 purging step, a CO 2 desorbing step, or a column cooling step.