Spiral wound membrane element for high temperature filtration

Abstract

A spiral wound membrane module is suitable for use with high temperature water that may also have a high pH, for example steam injection produced water. The module uses a membrane with a polyphenylenesulfide (PPS) backing material. The feed spacer of the module may be made from polyphenylene sulfide (PPS) or ethylene chlorotrifluoroethylene (ECTFE). The permeate carrier may be made of a woven nylon (i.e. nylon 6, 6) fabric coated with high temperature epoxy. The core tube and anti-telescoping device may be made of polysulfone. In some examples, the module may be used at a temperature of up to130 DEG C. Optionally, the module may be used at a pH of 9.5 or more. In a filtration method, the module may be operated at a pressure in the range of 150 to 450 psi. The module may be operated at agenerally constant pressure.

Description

[0001] related application [0002] This application claims the benefit of U.S. Application Serial No. 62 / 629,286, filed February 12, 2018. technical field [0003] This specification relates to spiral wound membrane elements or modules useful for example in reverse osmosis or nanofiltration, to methods and apparatus for treating high temperature fluids, and to methods and apparatus for treating produced water for reuse in steam boilers or generators equipment, for example in Steam Assisted Gravity Drainage (SAGD) or other high temperature produced water treatment methods. Background technique [0004] The following discussion is not an admission that anything discussed below is citable as prior art or common general knowledge. [0005] In the production of various forms of oil and gas, produced water or other water streams are generated that must be treated for disposal or reuse. For example, in a bitumen mining method known as steam-assisted gravity drainage (SAGD), stea...

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However, ceramic membranes are often expensive and can be difficult to clean

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