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Technology Factsheet

Mini-Scrubber

Category: Decontamination > Mechanical Surface Removal > Water-Jet
Reference # : Model No :

Mini-Scrubber: Designed with 6 nozzle spray bars, the Mini Scrubber's 6 inches cleaning head path easily outperforms conventional hand held waterjetting guns for most flat surface cleaning. It is also equipped with a spray bar designed with 6 nozzles. The dual triggered Mini Scrubber comes equipped with adjustable wheels and a vacuum attachment engineered for removal and containment of blasted coatings and water resulting in a cleaner work area. It is lightweight (Less than 15 lbs.), produces a consistent finish, reduces operator fatigue and allows for closer blasting to surface edges. Ultra-High Pressure (UHP) Pump: The UHP is a portable intensifier diesel pump, which provides up to 55,000 psi at 4.3 gallons per minute (gpm). Filter Press: The filter press consists of 16 to 24 filter plates or screens with 3-micrometer (µm) diameter orifice, mounted on a metal frame. The filter press has a capacity of 3 ft 3 . Before filtration process starts, each filter is covered by a powder clay solution. This powder clay solution acts as a coating to maximize particle capture. This filter press was used to filter wastewater for continuously recycling.

Benefits

(1) The water used for metal coating removal carries away any dust particles thus the process become virtually dust free. This aspect improves health and safety concerns for operators. (2) The Mini-Scrubber is easy to operate, hand held and lightweight tool, and wheel height can be adjusted for maximum efficiency. (3) During metal decontamination the majority of wastewater is captured by the vacuum system, which minimizes the release of contaminants to the environment. However, improvements can be done in the vacuum system capacity and sucking power. (4) The overall decontamination method is fast, efficient, and demonstration was considered successful. (5) Waste generated is mainly wastewater and paint ships. (6) Wastewater generated after filtration met local sewer discharge standards. Wastewater pH was 11 through the demonstration. After demonstration was completed pH was adjusted with hydrochloric acid, 20% Baum (31.45 w/w%) until meet local sewer discharge standards (5.5 – 9.5).

Limitations

(1) Tool operation represents an ergonomic hazard for operator. The operator is exposed to ergonomic stressors, such as stooping, bending, twisting, kneeing, lifting, etc. Exposure to vibrating tool (hand-arm-vibration) has the potential to cause problems such as Raynaud’s Syndrome (vibration white finger). (2) This technology slightly represents a noise hazard above the OSHA Permissible Exposure Limit (PEL). Personal protective equipment as well as hearing protection needs to be considered. (3) Vacuum capacity is limited to 5 gallons thus; operation needs to be stopped as soon as the vacuum tank gets full.

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