Transportable decontamination unit and decontamination process

• US 8,163,236 B1
• Filed: 01/25/2012
• Issued: 04/24/2012
• Est. Priority Date: 03/06/2007
• Status: Active Grant

• Current Assignee: Steris Corporation
• Original Assignee: Steris Corporation
• Inventors: Bacik, Michael A., Hill, Aaron L., Buczynski, Peter J., Weiss, Richard A., Meilander, Timothy W., Wiget, Paul A., McVey, Iain F., Centanni, Michael A.
• Primary Examiner(s): Joyner, Kevin
• Application Number:
  US13/357,633
• Publication Number:
  US 20120121462A1
• Time in Patent Office: 90 Days
• Field of Search: 422/28, 422/29, 422/291, 422/292, 422/300
• US Class Current: 422/28
• CPC Class Codes: A61L 2/208 Hydrogen peroxide
• CPC Class Codes: A61L 2202/122 Chambers for sterilisation
• CPC Class Codes: A61L 2202/26 Textiles, e.g. towels, beds, cloths

Abstract

The disclosed invention relates to a portable decontamination unit. The invention also relates to a decontamination process. The decontamination unit may be ruggedized for use in hostile environments such as those that may be anticipated for military applications.

Claims

1. A process for operating a self-contained transportable decontamination unit comprising:

a housing containing a decontamination chamber and a decontaminant processing section; and

a military master pallet on which the housing is positioned;

the decontamination chamber comprising a first entrance with a first door, the first entrance being adapted for placing articles to be decontaminated in the decontamination chamber, and an opposite second entrance with a second door, the second entrance being adapted for removing decontaminated articles from the decontamination chamber, the decontamination chamber including at least one gas inlet for admitting a decontaminant air stream into the decontamination chamber from the decontaminant processing section and at least one gas outlet for permitting a gaseous air stream to flow out of the decontamination chamber into the decontaminant processing section;

the decontaminant processing section comprising a power generator and a decontaminant generator, the power generator being adapted for providing electrical operating power for the decontaminant generator, the decontaminant generator being adapted for destroying residual amounts of decontaminant in the gaseous air stream, dehumidifying the gaseous air stream, and adding decontaminant to the gaseous air stream to form the decontaminant air stream;

wherein the housing and the decontamination chamber are (1) hardened to ensure that five exposures to chemical, biological, radiological or nuclear contaminants, decontaminants and decontaminating procedures over a thirty-day period do not cause the housing or decontamination chamber to require corrective maintenance during that thirty-day period;

(2) constructed to withstand temperatures ranging from about −

32°

C. to about 49°

C.;

(3) constructed to withstand relative humidities ranging from about 5% to about 100%; and

(4) constructed to operate when exposed to conventional hazards of solar radiation, rain, fungus, salt fog, sand, dust, vibration and shock; and

wherein the power generator and decontaminant generator are ruggedized,

the process comprising;

opening the first door;

placing one or more contaminated articles in the decontamination chamber;

closing the first door;

operating the power generator to provide power to operate the decontaminant generator;

flowing the decontaminant air stream from the decontaminant processing section into the decontamination chamber;

contacting the contaminated articles in the decontamination chamber with the decontaminant air stream to decontaminate the contaminated articles;

flowing the gaseous air stream from the decontamination chamber back to decontaminant processing section;

opening the second door; and

removing the decontaminated articles from the decontamination chamber.

2. The process of claim 1 wherein the decontaminant comprises a peracid, peroxide, hypochlorite, ozone, or a mixture of two or more thereof.

3. The process of claim 2 wherein the decontaminant further comprises a solvent.

4. The process of claim 2 wherein the decontaminant further comprises an alkaline gas.

5. The process of claim 1 wherein the decontaminant comprises hydrogen peroxide.

6. The process of claim 1 wherein the decontaminant comprises vaporous hydrogen peroxide and ammonia.

7. The process of claim 1 wherein the contaminated articles comprise one or more of military weapons, clothing, body armor, computers, test equipment, optical devices, electronic devices and/or communications equipment.

8. The process of claim 1 wherein the contaminated articles are contaminated with one or more chemical, biological, radiological and/or nuclear warfare agents.

9. The process of claim 1 wherein the contaminated articles are contaminated with one or more bacterial spores, vegetative bacteria, viruses, molds and/or fungi.

10. The process of claim 1 wherein the contaminated articles are contaminated with one or more pathogenic chemical agents.

11. The process of claim 1 wherein the step of contacting the contaminated articles with the decontaminant air stream comprises a dry process characterized by the absence of condensate formation on the surface of the contaminated articles being decontaminated.

12. The process of claim 1 wherein the step of contacting the contaminated articles with the decontaminant air stream comprises a wet process characterized by the formation of condensate on the surface of the contaminated articles being decontaminated.

13. The process of claim 12 wherein the condensate comprises hydrogen peroxide.