Energy recovery device

Abstract

An energy recovery device particularly for heating or industrial systems that entail the combustion of products, comprising a tubular element, which is arranged at a flue or stack and has a coil which is perforated along its extension. The coil is connected to a delivery tube for the treatment water for scrubbing the exhaust gases. The tubular element has an outlet for collecting the treatment water, which can be conveyed to a recuperator/heat exchanger. The device makes it possible to reduce the emission of particulates and pollutants into the environment and reduces the temperature of the exhaust gases besides allowing heat energy recovery.

1 . An energy recovery device, comprising: a tubular element, which is arranged at a portion of a flue or stack; at least one coil provided internally to said tubular element, said coil being closed at one end and having perforations along its extension; a delivery tube that is connected to said coil for feeding thereto treatment water for scrubbing exhaust gases that pass through the stack, and wherein said tubular element has an outlet for collecting treatment water, which can be conveyed to a recuperator or heat exchanger. 
   
   
       2 . The device of  claim 1 , wherein said tubular elongated element has a substantially cylindrical cross-section with first and second ends thereof, a flat top and, proximate to said first and second ends, a tapered portion, which is frustum-shaped for connection to a first opening and to a second opening, respectively for inflow and outflow of a flow of exhaust gases, said first and second openings having a circular cross-section. 
   
   
       3 . The device of  claim 2 , wherein said first and second openings are connected at respective portions of a flue or stack, so that the flow of exhaust gases that enters through said first opening passes through all of said tubular element and exits through said second opening, as processed exhaust gases. 
   
   
       4 . The device of  claim 3 , comprising a delivery tube for treatment water that is usable to scrub exhaust gases that pass through said tubular element, said at least one coil being provided inside said tubular element and consisting of at least one single tube that is arranged on a horizontal plane proximate to said top, said coil having a third coil closed end which is arranged proximate to said first opening, and a fourth coil end, which is arranged proximate to said second opening, said fourth coil end being connected to said delivery tube. 
   
   
       5 . The device of  claim 4 , comprising a series of first holes formed along an entire coil surface directed at least toward a bottom of said tubular element, said coil being suitable for arrangement with said third and fourth ends in reversible arrangement, the treatment water that is fed in said coil exiting from said series of first holes. 
   
   
       6 . The device of  claim 5 , wherein said tubular element has, at said bottom and further in a region that is adjacent to said second opening, a second hole, with an outlet associated thereto which is suitable to convey the treatment water to a recuperator or heat exchanger. 
   
   
       7 . The device of  claim 2 , arranged vertically, with said tubular element, arranged interposed vertically between flue or stack parts, said tubular element having a part thereof that is adjacent to said first opening that is provided with a port having an axis that is inclined with respect to a longitudinal axis of said tubular element. 
   
   
       8 . The device of  claim 7 , wherein said tubular element is provided internally with said at least one coil that is mounted so as to be extractable therefrom, said at least one coil consisting of at least one single tube, said first and/or second ends of the tubular element being removable, said coil extending radially within said tubular element until the coil skims an inner lateral surface of the tubular element, forming a series of circular turns, said turns being provided with and supported by a locking means, said coil being further closed at a third end thereof and having first holes formed both on a surface of the coil that is directed toward said first end of the tubular element and on the surface of the coil that is directed toward said inner lateral surface of said tubular element. 
   
   
       9 . The device of  claim 8 , having a fourth end provided with and connected to a delivery tube for feeding of treatment water used to scrub exhaust gases that enter through said first opening, and an outlet provided for treatment water that filters exhaust gases in countercurrent, said outlet being arranged below and contiguously to an end of the flue, which is connected, along said inclined axis, to said port adjacent said first opening, so as to be arranged in axial alignment with said tubular element.