Dispersant application for clean-up of recirculation paths of a power producing facility during start-up
AssigneeElectric Power Research Institute, Inc.
InventorsKeith Paul Fruzzetti, Charles Marks
Life of this patent
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Abstract
A method for reducing corrosion product transport in a power producing facility. The method includes the steps of selecting a chemical dispersant adapted to reduce the deposition of corrosion products in the recirculation path, and using at least one chemical injector to inject the chemical dispersant into a fluid contained in the recirculation path during recirculation path cleanup to increase corrosion product removal.
Claims22
A method for reducing corrosion product transport in a power producing facility, comprising the steps of:
- (a) selecting a chemical dispersant adapted to reduce the deposition of corrosion products in the recirculation path;
- and
- (b) using at least one chemical injector to inject the chemical dispersant into a fluid contained in the recirculation path during recirculation path cleanup to increase corrosion product removal.
A method of testing resuspension characteristics of a chemical dispersant, comprising the steps of:
- (a) providing a testing apparatus, comprising:
- (i) a solution containment vessel;
- (ii) a drive system;
- and
- (iii) a shaft;
- (b) attaching a substrate coated with deposit material to the shaft;
- (c) immersing the coated substrate in a solution contained in the vessel;
- (d) using the drive system to rotate the shaft and coated substrate at a predetermined velocity;
- and
- (e) determining an amount of deposit material removed from the substrate.
A method of reentraining existing deposits in a recirculation path, comprising the steps of:
- (a) selecting a chemical dispersant adapted to suspend corrosion products in the recirculation path;
- (b) using at least one chemical injector to inject a pre-determined amount of the chemical dispersant into a fluid contained in the recirculation path;
- and
- (c) circulating the chemical dispersant in the recirculation path for a pre-determined amount of time to allow the chemical dispersant to mix with the fluid and suspend the corrosion products.
Dependencies are inferred from the claim text.