| 摘要 |
<p>PURPOSE:To prevent corrosion of the apparatus due to vapor condensation of SOx etc. contained in the exhaust gas on the surface of ducts, by forming three- layer current, composed of exhaust gas, air and water, and giving heat of exhaust gas to water through the air. CONSTITUTION:A cylindrical exhaust gas duct 4 is inserted between circular holes 2a, 3a formed opposite to partition plates 2, 3 of a rectangular duct 1. Three such ducts are installed in vertical direction. Cylindrical ducts 10 are provided around the exhaust ducts 4 between partition plates 8, 9 fixed inside of partition plates 2, 3. An air duct 11 is formed by spaces S1 and S2, and an air inlet 12 and an air outlet 13 are communicated. A space S3 forms a water duct 14, and a water inlet 15 and a water outlet 16 are communicated. High temperature exhaust gas from a boiler etc. is passed through the exhaust ducts 4, and air is fed to the air duct 11 by pressure from the inlet 12 by an air blower, and heat exchange is effected through the exhaust ducts 4. Heated air is made to exchange heat with water flowing in the water duct 14, and warm water is recovered.</p> |
