초록 ▼

The heat exchanger, which forms a part of the fluid treatment apparatus of this invention, includes an insulated tubular having concentric telescopically nested spaced tubes, wherein the space between the tubes is sealed and filled with an inert gas. The surfaces of the tubes are coated with a hydro

The heat exchanger, which forms a part of the fluid treatment apparatus of this invention, includes an insulated tubular having concentric telescopically nested spaced tubes, wherein the space between the tubes is sealed and filled with an inert gas. The surfaces of the tubes are coated with a hydrogen permeation barrier preferably comprising an aluminum-iron alloy, nickel or copper which limits atomic hydrogen permeation into the space between the tubes, which would combine to form hydrogen gas and result in heat loss. The insulated tubular is telescopically nested in a pipe, forming a fluid heat exchanger and the heat exchanger is telescopically nested in fluid waste circulation pipes, forming the fluid treatment apparatus of this invention. The preferred fluid heat exchanger is a vertically extending deep well reactor suitable for wet oxidation reaction of fluid wastes including municipal sludge.

대표청구항 ▼

An elongated heat exchanger, comprising an elongated insulated tubular having an open end generally concentric with telescopically nested in and surrounded by a second pipe having a closed end adjacent said open end of said insulated tubular and communicating therewith, said insulated tubular having

An elongated heat exchanger, comprising an elongated insulated tubular having an open end generally concentric with telescopically nested in and surrounded by a second pipe having a closed end adjacent said open end of said insulated tubular and communicating therewith, said insulated tubular having a first inner metal tube and a second outer metal tube generally concentric with and surrounding said first tube in spaced relation, the space between said first and second tubes sealed and filled with an inert gas, a hot heat transfer fluid received in one end of said insulated tubular and flowing through said insulated tubular, said heat transfer fluid cooling and returning through said second pipe for heating and recirculation, and a hydrogen permeation barrier on the inner and outer surfaces of said first and second tubes of said insulated tubular, said hydrogen permeation barrier comprising a metal coating selected from the group consisting of aluminum, nickel and copper, said permeation barrier reducing the flow of atomic hydrogen into said space between said first and second tubes of said insulated tubular, thereby reducing heat losses from said heat transfer fluid in said insulated tubular to the returning heat transfer fluid in said second pipe.