Apparatus for combustion of synthetic gases deriving from treatment of organic material, plant and process for treatment of organic material

Abstract

An apparatus for combustion of synthetic gases comprises a burner ( 75 ), a combustion chamber ( 62 ) cooperating with the burner ( 75 ) and having an outlet ( 64 ) destined to eject exhaust gases, a fluid supply circuit ( 65 ) configured for supplying a comburent gas to the burner ( 75 ), wherein the fluid supply circuit ( 65 ) is at least partially outside the combustion chamber ( 62 ) and has one or more channels ( 66 ) in contact with an outer surface ( 62 a ) of the combustion chamber ( 62 ) for exchanging heat with the combustion chamber itself. A plant and a process using the above combustion apparatus are also described.

1 . Apparatus for combustion of synthetic gases deriving from the treatment of organic material, for example through pyrolysis, said apparatus comprising:
 a burner;   a combustion chamber cooperating with the burner and having an outlet destined to eject exhaust gases; and   a fluid supply circuit configured for supplying a comburent gas to the burner, wherein the fluid supply circuit is at least partially outside the combustion chamber and has one or more channels in contact with an outer surface of the combustion chamber for exchanging heat with the combustion chamber;   wherein the burner comprises:
 a combustible access configured for receiving a combustible gas, 
 a comburent access configured for receiving the comburent gas from the fluid supply circuit,
 a mixing chamber in communication with the comburent access and the combustible access for mixing said gases in inlet through said accesses, 
 an activation device operating in the mixing chamber and configured for triggering the combustion of said gases. 
 
   
     
     
         2 . Apparatus according to  claim 1 , wherein the fluid supply circuit has a gas access for receiving the comburent gas from an environment outside the combustion chamber and a gas outlet in communication with the combustion chamber or with the comburent access of the burner; and wherein the burner is placed upstream or internally to the combustion chamber. 
     
     
         3 . Apparatus according to  claim 1 , wherein said one or more channels of the fluid supply circuit are formed from subsequent sections of a single continuous channel or from distinct channels in communication to each other, wherein said one or more channels are overlapped to a preponderant part of the outer surface of the combustion chamber. 
     
     
         4 . Apparatus according to  claim 1 , wherein the combustion chamber extends along a development direction, and wherein said one or more channels of the fluid supply circuit are arranged transversely to the development direction of the combustion chamber. 
     
     
         5 . Apparatus according to  claim 1 , wherein said one or more channels form at least a single continuous channel extending around the outer surface of the combustion chamber along a helical trajectory. 
     
     
         6 . Apparatus according to  claim 1 , wherein said one or more channels form annular-shaped segments extending around to the outer surface of the combustion chamber, wherein each of said segments is in communication with an adjacent channel. 
     
     
         7 . Apparatus according to  claim 1 , wherein the combustion chamber has a hollow tubular conformation;
 wherein the combustion chamber has a first and a second terminal wall which longitudinally delimit the combustion chamber;   wherein the burner is carried by the first terminal wall; and   wherein the fluid supply circuit contacts the outer surface from an area next to the second terminal wall until an area next to the first terminal wall.   
     
     
         8 . Apparatus for combustion of synthetic gases deriving from the treatment of organic material, for example through pyrolysis, said apparatus comprising:
 a burner;   a combustion chamber cooperating with the burner and having an outlet destined to eject exhaust gases; and   a fluid supply circuit configured for supplying a comburent gas to the burner,   wherein the fluid supply circuit is at least partially outside the combustion chamber and has one or more channels in contact with an outer surface of the combustion chamber for exchanging heat with the combustion chamber;
 wherein the fluid supply circuit comprises a sleeve which wraps the combustion chamber and is radially outside the outer surface of the combustion chamber to form a gap for receiving said comburent gas. 
   
     
     
         9 . Apparatus according to  claim 8 , wherein the fluid supply circuit comprises one or more walls arranged transversely to a development direction of the combustion chamber, wherein subsequent sections of the one or more separating walls are parallel to each other; and
 wherein said one or more channels are laterally delimited by subsequent sections of the one or more separating walls and radially delimited by the sleeve.   
     
     
         10 . Apparatus according to  claim 9 , wherein said walls extend radially, outside the outer surface of the combustion chamber and internally to the sleeve. 
     
     
         11 . Apparatus according to  claim 9 , wherein said one or more walls are interconnected to each other to define a single helical element extending around the outer surface of the combustion chamber for a preponderant part or for all of a length of the combustion chamber measured parallel to the development direction. 
     
     
         12 . Apparatus according to  claim 8  comprising a case radially outside the sleeve which defines a gap between the sleeve and an inner surface of the case,
 wherein at least one of: the combustion chamber, the sleeve, and the case is devoid of coatings made in refractory or thermally insulating materials. 
 
     
     
         13 . Apparatus according to  claim 8 , wherein the burner comprises an auxiliary access in communication with the combustion chamber for receiving combustible gas and allowing an initial ignition of the apparatus. 
     
     
         14 . Apparatus according to  claim 8 , wherein the fluid supply circuit comprises a connection duct which connects the burner with a terminal part of the gap formed by said sleeve. 
     
     
         15 . Apparatus for combustion of synthetic gases deriving from the treatment of organic material, for example through pyrolysis, said apparatus comprising:
 a burner;   a combustion chamber cooperating with the burner and having an outlet destined to eject exhaust gases, wherein the combustion chamber extends along a development direction;   a fluid supply circuit configured for supplying a comburent gas to the burner;   wherein the fluid supply circuit is at least partially outside the combustion chamber and has one or more channels in contact with an outer surface of the combustion chamber for exchanging heat with the combustion chamber;
 wherein said one or more channels of the fluid supply circuit are formed from subsequent sections of a single continuous channel or from distinct channels in communication to each other; wherein said one or more channels overlap a preponderant part of the outer surface of the combustion chamber; and 
 wherein said one or more channels of the fluid supply circuit are arranged transversely to the development direction of the combustion chamber. 
   
     
     
         16 . Apparatus according to  claim 15 , wherein the fluid supply circuit has a gas access for receiving the comburent gas from an environment outside the combustion chamber and a gas outlet in communication with the combustion chamber or with the comburent access of the burner; and
 wherein the burner is placed upstream or internally to the combustion chamber.   
     
     
         17 . Apparatus according to  claim 15 , wherein said one or more channels form a single continuous channel extending around the outer surface of the combustion chamber along a helical trajectory. 
     
     
         18 . Apparatus according to  claim 15 , wherein said one or more channels form annular-shaped segments extending around to the outer surface of the combustion chamber, wherein each of said segments is in communication with an adjacent channel. 
     
     
         19 . Apparatus according to  claim 15 , wherein the combustion chamber has a hollow tubular conformation;
 wherein the combustion chamber has a first and a second terminal wall which longitudinally delimit the combustion chamber;   wherein the burner is carried by the first terminal wall.   
     
     
         20 . Apparatus according to  claim 19 , wherein the fluid supply circuit contacts the outer surface from an area next to the second terminal wall until an area next to the first terminal wall.