Patent ID: 8579020

Claim:
An improved concentric tube heat exchanger, comprising: at least a cylindrical tube ( 1 ) for circulation of a product to be treated, provided with a flanged inlet ( 11 ) and a flanged outlet ( 12 ) of the product; a hollow body ( 2 ) internally of which an exchange service fluid circulates, the hollow body being arranged concentrically internally of the tube ( 1 ) and configured such as to define internally thereof compulsory pathways respective for an outward and a return run of the exchange service fluid and such as to have the inlet and the outlet of the exchange service fluid arranged at a same end of and in proximity of an end of the tube; a flanged inlet connector ( 3 ) for introducing the product into the tube ( 1 ), a flange ( 3 a ) of which the inlet connector ( 3 ) connects with an inlet flange ( 11 a ) of the inlet ( 11 ) of the tube; a flanged outlet connector ( 4 ) for extracting the product from the tube ( 1 ), a flange ( 4 a ) of the outlet connector ( 4 ) connects with a flange ( 12 a ) of the outlet ( 12 ) of the tube; an intermediate flange ( 5 ), said intermediate flange ( 5 ): being solidly connected to the end of the hollow body provided with the inlet and the outlet for the exchange service fluid; projecting from the tube ( 1 ); being, provided with a passage hole ( 5 c ) for the product to be treated and with an inlet mouth ( 5 a ) and an outlet mouth ( 5 b ) for the exchange service fluid, respectively connected to the outward and return pathway of the exchange service fluid; the passage hole ( 5 c ), inlet mouth ( 5 a ) and outlet mouth ( 5 b ) not being in reciprocal connection; the passage ( 5 c ) for the product to be treated crossing the intermediate flange ( 5 ) in the axial direction of the tube ( 1 ); the flange of the inlet connector ( 3 ) and the inlet flange ( 11 a ) of the inlet ( 11 ) of the tube in combination embracing the intermediate flange ( 5 ) between them; or the flange ( 4 a ) of the outlet connector ( 4 ) and the flange ( 12 a ) of the outlet ( 12 ) of the tube in combination embracing the intermediate flange ( 5 ) between them.