Heat recovery device

Abstract

A heat recovery device, particularly for reducing energy consumption in heating sanitary water for residential use or for industrial use by reducing the temperature of the combustion gases and of the particles dispersed by stacks of heating boilers. The device consists of a tubular element, which has an inlet for the water drawn from the aqueduct, which flows along a coil of tubes up to the exit toward the heating boiler. The tubular element also has an opening for the inflow of the combustion gases that arrive from the heating boiler and exit through a second opening after flowing around the coil that contains the water drawn from the aqueduct. The device thus allows savings in heating water for domestic and industrial uses and also allows a reduction in the emission of fine particles.

1 . A heat recovery device, comprising: a tubular element, which is interposable in use between two opposite ends of a stack or flue; at least one removable tube coil provided internally to said tubular element, said removable coil having a first input connector, which is connectable to an aqueduct or to a well, and a second output connector for sending heated water to devices for further heating or to accumulation tanks. 
   
   
       2 . The device of  claim 1 , wherein said first connector is arranged proximately to a lower end of said tubular element and comprises a double-comb locking means and a first vertical portion which is internal to said tube coil, and is suitable for conveying aqueduct or well water to a top part of said tubular element, said tube coil being arranged extending inside, and so as to skim an internal lateral surface of said tubular element, and to form a series of circular turns, said circular turns being supported by said double-comb locking means. 
   
   
       3 . The device of  claim 2 , wherein said double-comb locking means comprises: a handle arranged transversely to an upper end of said double-comb locking means; and two pairs of linear flanges, which are located mutually opposite and have a series of seats for positioning and resting thereon portions of tube that constitute said tube coil, said double-comb locking means being fixed to said tubular element by way of screws, which are provided passing through holes formed in said tubular element, simultaneous extraction of said locking means and of said tube coil being performable, upon unscrewing of the screws, by way of said handle that can be gripped by a user. 
   
   
       4 . The device of  claim 3 , wherein said tubes of said tube coil are of a non-rigid type, said tube coil being able to contract if pressure of fluid contained therein decreases and to expand when the pressure increases. 
   
   
       5 . The device of  claim 4 , wherein said tubular element is cylindrical and hollow and has, at said lower end, a portion that tapers along a vertical axis thereof and is frustum-shaped for connection to a flue, said lower end terminating with a third tubular connector, which has a circular cross-section and a first opening, said tubular element being suitable for connection at an outlet of at least one boiler or for insertion in a plurality of modules in a cascade arrangement to serve said at least one boiler provided in a condominium heating system. 
   
   
       6 . The device of  claim 5 , comprising anchoring means consisting of two rods, which are mutually connected in an X-shaped arrangement, said two rods having, at ends thereof, holes for accommodating locking screws, said tubular element comprising at least one diffuser cone and in a preferred embodiment three diffuser cones arranged along the vertical axis of said tubular element, for facilitating better heat exchange between a stream of combustion gases and water that flows inside said tube coil, said diffuser cones being fixed to said double-comb locking means by way of said anchoring means. 
   
   
       7 . The device of  claim 6 , wherein said tubular element is provided, in a region proximate to said first opening, with condensation recovery means for recovering condensation, said condensation recovery means having a drain tube connected to a particle recovery tank, of a type that allows inspection and opening for cleaning, which is arranged below said tubular element, and wherein said condensation recovery means has preferably a tray concave shape. 
   
   
       8 . The device of  claim 1 , comprising a cover, which is engaged detachably with an upper end of said tubular element, said cover having a frustum shape which terminates in a portion that tapers upwardly and is provided with a second end opening. 
   
   
       9 . The device of  claim 5 , comprising: a first thermometer, which is associated with said first connector for inflow of water that arrives from an aqueduct or from a well; a second thermometer, which is associated with said second connector at a water outlet of said tubular element; a third thermometer, which is associated with the third connector arranged at said lower end, and with a fourth thermometer for measuring temperature of combustion gases in output, which is arranged on said upper end. 
   
   
       10 . The device of  claim 1 , comprising: an accumulation tank arranged so as to receive water in output from said tubular element before conveyance thereof into at least one boiler; a second duct being further provided which is connected to said second connector for water outflow from said tubular element and connected to a lower region of said accumulation tank; a circulation pump being inserted in said second duct; a third duct provided for delivery in output from an upper region of said accumulation tank, said third duct continuing with and splitting into a fourth duct for entering the at least one boiler; a fifth duct which terminates with a first redirection valve which is arranged in a pipe of an aqueduct that is connected to said first connector of said tubular element, in order to allow formation of a closed circuit between said accumulation tank and the heat recovery device; and a second redirection valve provided so as to intercept said fourth and fifth ducts.