Method of cleaning a contaminated surface

Patent metadata

Field	Value
Publication number	US-10493497-B2
Application number	US-201615181964-A
Country	US
Kind code	B2
Filing date	Jun 14, 2016
Priority date	Oct 3, 2012
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A cleaning apparatus is provided that includes a first nozzle configured to direct a cleaning jet towards a contaminated surface at a pressure sufficient to remove contaminants from the surface. At least one second nozzle is configured to direct a rinsing jet towards the contaminated surface to remove cleaning fluid therefrom, wherein the rinsing jet is directed at a pressure sufficient to isolate the cleaning jet from an ambient environment.

First claim

What is claimed is:

1. A method of cleaning a contaminated surface, said method comprising:
directing a cleaning jet, formed from a cleaning fluid including steam and at least one cleaning chemical, towards a contaminated surface with a first nozzle coupled to a guide piece, the first nozzle in flow communication with a cleaning fluid source, the cleaning jet directed at a pressure sufficient to remove contaminants from the contaminated surface; and
directing a plurality of rinsing jets, formed from a rinsing fluid including steam, towards the contaminated surface with a plurality of second nozzles to remove the cleaning fluid therefrom, the plurality of second nozzles in flow communication with a rinsing fluid source, the plurality of second nozzles coupled to the guide piece and circumscribing the first nozzle, the plurality of rinsing jets directed at a pressure that is one of equal to or greater than the cleaning jet pressure such that airborne contamination from the at least one cleaning chemical is restricted by the plurality of rinsing jets.

2. The method in accordance with claim 1 , further comprising directing the cleaning jet and the plurality of rinsing jets towards the contaminated surface simultaneously.

3. The method in accordance with claim 1 , further comprising:
generating the cleaning fluid with the cleaning fluid source that includes a steam generation unit and a cleaning fluid injection unit; and
generating the rinsing fluid with the rinsing fluid source that includes the steam generation unit and a rinsing fluid injection unit.

4. The method in accordance with claim 3 , wherein generating cleaning fluid further comprises combining at least one predetermined cleaning chemical from the cleaning fluid injection unit with dry steam from the steam generation unit.

5. The method in accordance with claim 3 , wherein generating rinsing fluid further comprises at least one of:
generating wet steam with the steam generation unit; and
combining at least one solvent from the rinsing fluid injection unit with wet steam from the steam generation unit.

6. The method in accordance with claim 5 , wherein generating rinsing fluid comprises generating rinsing fluid for the plurality of rinsing jets that includes at least 85% wet steam by weight of the rinsing fluid.

7. The method in accordance with claim 6 , wherein generating cleaning fluid further comprises generating cleaning fluid for the cleaning jet that includes at least 40% dry steam by weight of the cleaning fluid.

8. The method in accordance with claim 1 further comprising activating the plurality of rinsing jets before activating the cleaning jet.

9. The method in accordance with claim 8 further comprising deactivating the cleaning jet before deactivating the plurality of rinsing jets.

Assignees

• Boeing Co

Inventors

• Ponomarev Sergey G

Classifications

• B05B7/0892

  the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle · CPC title

• B08B2230/01

  Cleaning with steam · CPC title

• B05B7/1686

  involving vaporisation of the material to be sprayed or of an atomising-fluid-generating product · CPC title

• B05B7/0876

  to form parallel jets constituted by a liquid or a mixture containing a liquid (B05B7/0884, B05B7/0892 take precedence) · CPC title

• B08B3/02 Primary

  Cleaning by the force of jets or sprays · CPC title