Smokestack Having Reduced IR Emission.
Patent, Filed 30 Oct 74, patented 19 Mar 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
An aircooled smokestack. The smokestack has passages within it for air or other cooling fluid. The fluid circulates through the smokestack, cooling off the internal and external surfaces. The cooling fluid is then aspirated into the stack gases near the top of the stack, thereby film cooling the upper portion of the interior of the stack. Cooling air is also aspirated into the flowing gases at the top of the stack, thereby cooling the gases as they leave the stack. Briefly, the present invention is a smokestack for a ship or fixed installations which is air cooled to reduce the infrared radiation emitted by the stack. Air or other cooling fluid is taken into a plenum chamber at the base of the stack and circulated through the stack. The cooling passages within the stack are directly beneath the interior and exterior surfaces of the stack. After being circulated through the cooling passages, the air is aspirated into the gas path within the stack it then film cools the upper portion of the interior of the stack.
- Air Pollution and Control