Method for applying a slurry coating onto a surface of an inner diameter of a conduit
AssigneePraxair Technology, Inc.
InventorsSang Muk Kwark, Zigui Lu, David P. Potempa, Maulik R. Shelat
Life of this patent
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Abstract
A method for creating a coating onto an inner diameter of conduit, whereby an injection nozzle is moved in a forward direction until its tip is aligned with the end of the conduit. Slurry is pumped from a reservoir into the injection nozzle and then is discharged through the tip of the injection nozzle. The slurry flows, distributes and spreads onto the surface of the conduit. The conduit is rotated and the nozzle is retracted as slurry continues to discharge from the nozzle to coat the remainder of the conduit.
Claims17
A method for applying a coating onto a surface of an inner diameter of a heat exchanger conduit, comprising:
- feeding a pre-mixed slurry formulation into a slurry reservoir, said slurry reservoir operably connected to an injection nozzle;
- introducing the injection nozzle in a forward direction into the heat exchanger conduit, said heat exchanger conduit defined, at least in part, by a longitudinal length extending between a first end and a second end;
- configuring the injection nozzle to a first position within the heat exchanger conduit, said first position defined as a first end of the injection nozzle being substantially aligned with the first end of the heat exchanger conduit;
- pumping said pre-mixed slurry formulation from said slurry reservoir and through said injection nozzle so as to discharge said pre-mixed slurry formulation from the first end of the injection nozzle towards the inner surface of the heat exchanger conduit;
- detecting the discharged pre-mixed slurry formulation and, in response thereto;
- rotating said heat exchanger conduit, thereby allowing the discharged pre-mixed slurry formulation to be spread and distributed substantially uniformly along the inner surface of the heat exchanger conduit;
- and
- retracting at a predetermined feed rate said injection nozzle, said retracting occurring in a reverse direction opposite to said forward direction.
A method for applying a coating onto a surface of an inner diameter of a heat exchanger conduit, comprising:
- feeding a pre-mixed slurry formulation into a slurry reservoir;
- introducing an injection nozzle in a forward direction into the heat exchanger conduit;
- configuring the injection nozzle to a first position within the heat exchanger conduit;
- pumping said pre-mixed slurry formulation from said slurry reservoir and through said injection nozzle so as to discharge said pre-mixed slurry formulation towards the inner surface of the heat exchanger conduit;
- detecting the discharged pre-mixed slurry formulation and, in response thereto;
- rotating said heat exchanger conduit, thereby allowing the discharged pre-mixed slurry formulation to be spread and distributed substantially uniformly along the inner surface of the heat exchanger conduit;
- and
- retracting at a predetermined feed rate said injection nozzle while rotating said heat exchanger conduit, said retracting occurring in a reverse direction opposite to said forward direction.
Dependencies are inferred from the claim text.