I am not sure if equivalent stress is appropriate as I want to find out the normal stress to avoid peak stress that is excluded in the assessment. I am trying to see if it is feasible to transform the stress to the direction by rotating the model but with a new simple model. It is designed to work best in water that is under 2500 ppm TDS.
There are a variety of membranes in use throughout the market which act as processes in treating groundwater, surface water, and wastewater to a level that is acceptable for industries and especially consumption. It is a rapidly growing industry, as a result of the need to combat low quality water sources such as rivers, lakes, wells, streams, and the ocean, in order to provide more alternative methods in supplying healthy, safe, steady, and accessible water to the masses. 1 shows a cut-away view of a typical reverse osmosis spiral wound membrane element 1 of this invention within a cylindrical RO pressure vessel 2. The membrane element 1 is sealed within the pressure vessel 2 with end plates 2a and 2b containing ports for the various feed, concentrate and permeate nozzles and retained in position by ring clamps 10a and 10b.
AXEON TF – Series Residential Membrane Elements are recognized as one of the industry’s most reliable and highest performing membrane elements that deliver consistent quality and performance. Advanced manufacturing processes and utilization of the industry’s leading film technology allows these elements to deliver consistent results that equipment suppliers and water treatment dealers have come to rely on. The Specialty Membranes XUS and XUS Reverse Osmosis Elements are the 4- and 2.5-inch diameter versions of the XUS ultra-high pressure element for industrial water purification which offers an industry wide distinct combination of features.
Reverse Osmosis/Nanofiltration Membranes that operates similarly in producing freshwater from the prevention of larger dissolved molecules from passing through the small pores of the permeable membrane, while allowing the pure water to flow through. The membrane filtration device of claim 14 wherein at least one lateral edge of spirally wound membrane is potted with an adhesive in a plastic end cup. The membrane filtration device of claim 14 wherein the membrane sheets and all spacers except those in the permeate channels are recessed at least about one inch from the axial end of the wound membrane at each permeate discharge end of the wound membrane sheets. The membrane filtration device of claim 14 wherein the membrane sheets are of the reverse osmosis type. The membrane filtration device of claim 1 additionally having at least one lateral edge of the spirally wound membrane sheets potted in a low viscosity adhesive for a distance of at least one inch from the axial end.
Evidently, if a plate falls under the category of 3D strcutural elements there are out-of-plane stresses as well. Alternatively in ABAQUS/Explicit, you can choose to have the thickness change computed through integration of the thickness-direction strain that is based on the element material definition and the plane stress condition. , you can choose to have the thickness change computed through integration of the thickness-direction strain that is based on the element material definition and the plane stress condition. The geometry of the element is defined by specifying nodal coordinates in a global Cartesian system.
INDUSTRIAL APPLICABILITY As described above, the present invention has high industrial applicability since it has a feature enabling the reuse of the membrane element and the like. As an example of the microporous filtration membrane 1, a Yumicron membrane manufactured by Yuasa Corporation, which has a number of micro pores with average pore size of 0.4 μm, can be used. The microporous filtration member 1 having such average pore size is called as a microfiltration membrane according to the definition of JIS K 3802. The aforesaid plate 2 as used is made of an acrylonitrile-butadiene-styrene copolymer resin. Providing each microporous filtration membrane 1 on the plate 2 in tension is achieved by joining the peripheral part of the plate 2 to the microporous filtration membrane without fusing the nonwoven fabric acting as the substrate 11. 2, when pressed by a linear-shaped hot plate disposed along the positioning line 21, the plate 2 is softened to have a recess, into which the microporous filtration membrane 1 is drawn, as represented by arrows.
Membranes in general act as perm-selective barriers, which allow some species to selectively permeate through them while selectively retaining other dissolved species. Reverse Osmosis can be used to either purify water or to concentrate and recover dissolved solids in feed water. Viscous surface pressure applied to the element reference surface. The pressure is proportional to the velocity normal to the element surface and opposing the motion. The pressure is positive in the direction opposite to the surface normal. The pressure is proportional to the velocity normal to the element face and opposing the motion.
These membrane elements with drilling degrees of freedom are more accurate indeed than the membrane elements with only translational degrees of freedom, but they are more computationally expensive since more nodal degrees of freedom are used. It is possible to run the membranes in series to meet the increased demands and increase the recovery rate, or to employ a concentrate recycle option on the system. This can however lower operational efficiencies of the system’s performance and increase the system cost.
Generally a thicker wall than for a membrane element but about 1/10 the length or width. All translational DOF are supported as well as rotational DOF that are not out of plane. That is rotation about the normal to the element surface is not allowed.
The results under different meshes in Table 4 demonstrate that GQ12 and GQ12M with the new method described in this paper can delete membrane locking and have the same accuracy as the traditional method. Once the element local stiffness matrix for membrane element is obtained, it is necessary to transform it from the local coordinate system to the global coordinate system. So the element local coordinate system needs to be established first. In the current application of the membrane elements, a traditional manner has been adopted to establish the local Cartesian coordinate system over an element .
Water flows through the channels between the spiral windings of the element, where permeate is collected in the center tube of the element before flowing to tank or drain. Several elements are connected within a pressure vessel and several vessels are connected within the filter system. Ceramic membranes are a type of artificial membrane made from inorganic materials, such as alumina, titania, zirconia oxide, or silicon carbide. Multiple layers of the ceramic membrane material are applied to create a tubular membrane element, also referred to as a ceramic element. Ceramic microfiltration uses a crossflow design where much of the feed flow travels tangentially across the surface of the filter, rather than into the filter. The patented Kemco ceramic membrane filtration system presents a cost-effective means of removing emulsified and suspended contaminants from wastewater without utilizing high volumes of treatment chemicals.