A Compact Self-Cleaning Filtration System with Periodic Automatic Back-Flushing for Pretreatment of RO Filtration

Award Information
Agency:
Department of Defense
Branch
Office of the Secretary of Defense
Amount:
$69,551.00
Award Year:
1998
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
41346
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
MECHANICAL SOLUTIONS, INC.
1719 Rt. 10 E, Parsippany, NJ, 07054
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Chang-wei Jen
(973) 326-9920
Business Contact:
() -
Research Institution:
n/a
Abstract
The objective of this proposal is to demonstrate the feasibility of an innovative design that combines centrifugal separation, cross-flow filtration (CFF), Dean flow surface cleaning and back-flush techniques into an effective micro-filtration unit. The centrifugal separation is effective in separating particles that have higher specific gravity that the feed fluid down to 20 microns. CFF is especially effective for feed flow with a high amount of colloidal solids. Unlike dead-end filtration, the surface dynamics of CFF does not make the gelatinous colloidal solids extrude through pores which often comprise the performance of filtration. CFF makes use of the shear force parallel to the filter medium to reduce the cake formation on the filter surface. Dean flow is a secondary flow created in a curved flow passage. The resulting flow profile takes the form of a toroidal vortex. The vortex profile generates a high shear rate which acts to transport material such as colloidal solids and fine silts away from the membrane surface. The combination of these features with an automatic back-flushing device forms a compact, self-cleaning and continuously operable unit suitable for pre-filtration in the Navy shipboard reverse osmosis application.

* information listed above is at the time of submission.

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