| 摘要 |
PROBLEM TO BE SOLVED: To provide a regenerative rotary preheater for oxygen burning, capable of preventing leakage of a secondary combustion-supporting fluid with a simple configuration and preventing a problem that pressure loss increases.SOLUTION: A regenerative rotary preheater for oxygen burning includes: a sector plate 20 including sector plate portions for defining a flue gas passage 21 conducting a flue gas at a negative pressure in an axial direction of a rotor 19, a primary combustion-supporting fluid passage 22 conducting a primary combustion-supporting fluid at a predetermined pressure comprised of a recirculation exhaust gas, and a secondary combustion-supporting fluid passage 23 conducting a secondary combustion-supporting fluid containing a mixture of oxygen and the recirculation exhaust gas and higher than the flue gas and lower than the primary combustion-supporting fluid in pressure; and seal plates 26 fixed to partition plates 25 extending in a radial direction of the rotor 19 for gas sealing from the sector plates 20. The regenerative rotary preheater includes a seal nozzle 28 along a longitudinal direction of the sector plate portion 20c defining the secondary combustion-supporting fluid passage 23 and the flue gas passage 21 for injecting seal gas 27 to axially both ends of the rotor 19. |
