Method for testing separation modules
AssigneeDow Global Technologies LLC
InventorsSteven Douglas Jons, Jon E. Johnson, Michael A. Fialkowski
Life of this patent
Estimating the term…
Abstract
New methods and apparatus are described for assessing the integrity of a separation module or filtration system. A principle embodiment concerns use of a transient pulse of challenge species to probe a spiral wound module. The resulting time-dependent concentration of challenge species in the permeate is detected, recorded, and compared to a reference. An apparatus is further claimed for detecting permeate conductivity at multiple points within the permeate collection tube of a spiral wound module. Also disclosed is a process whereby the permeate stream from a filtration system is concentration by a high recovery membrane apparatus prior to measurement of challenge species concentration.
Claims19
A method for measuring conductivity of permeate liquid at a plurality of locations along a permeate tube of a spiral wound module comprising the steps of:
- i) locating a probe device within a permeate tube of a spiral wound module, wherein the probe device comprises an array of conductivity cells mounted along a support structure,
- ii) introducing a feed liquid into the spiral wound module, and
- iii) measuring the conductivity of the permeate liquid.
A membrane filtration system comprising a pressure vessel containing at least one spiral wound module, wherein said spiral wound module comprises a permeate tube including holes along its length, and wherein said membrane filtration system is characterized by:
- a probe device located within and axially extending along the permeate tube, wherein the probe device comprises:
- an elongated support structure and an array of conductivity cells mounted along said support structure.
A probe device for simultaneously measuring permeate fluid conductivity at plurality of locations along a permeate tube of a spiral wound module, wherein the probe device comprises:
- an elongated support structure adapted to extend axially within the permeate tube of the spiral wound module;
- and
- an array of conductivity cells mounted along said support structure.
Dependencies are inferred from the claim text.