Patent application number | Description | Published |
20080257782 | CORROSION ASSESSMENT METHOD AND SYSTEM - A method includes assessing corrosion in a refinery operation having a piping network. Assessing can include identifying in a petroleum sample a presence and an amount of a species determined to be potentially corrosive to corrodible equipment in a refinery. A corrosion risk presented by the presence, the amount, and the boiling point of the species is determined. And, the corrosion risk is evaluated in view of piping network information. A system for implementing the method is provided, also. | 10-23-2008 |
20090152207 | PROCESS FOR THE REDUCTION OF BIOFOULING USING ELECTRIC FIELDS - A process to reduce or prevent biofouling, by destroying or deactivating microbiological content of feedwater, or other liquid, prior to its entrance into membranes or process equipment, such as heat transfer equipment. The process comprises the use of electrical discharge and/or electric fields to destroy microbes that result in the biofouling of surfaces. By destroying the microbiological content of the water the microbiology no longer is able to create a restricting biofilm upon or within said process equipment. | 06-18-2009 |
20100023276 | System and method for assessing fluid dynamics - Methods and systems for assessing fluid dynamics aspects of corrosion and shear stress in piping networks are provided. Shear stress hot spots of a piping network may be identified using non-dimensional transfer functions that have been developed for identifying the magnitude and location of these local maxima depending upon the geometrical parameters of commonly used components of piping networks, the fluid properties of the flow, and the operating conditions of the piping network. Upon identification of potential shear stress local maxima, piping network operators may monitor these locations for corrosion or other damage to prevent loss of integrity of the pipes. | 01-28-2010 |
20120067808 | FILTRATION APPARATUS AND PROCESS WITH REDUCED FLUX IMBALANCE - A filtration apparatus includes plurality of membrane modules arranged in series in a chamber. The membrane modules include at least one lead membrane module closer to an inlet port than the remaining membrane modules. A device coupled to the permeate collection conduit of the at least one lead membrane module is configured to apply a back pressure to permeate solution flowing in the permeate collection conduit of the at least one lead membrane module. By applying a back pressure, flux imbalance may be reduced within the apparatus. | 03-22-2012 |
Patent application number | Description | Published |
20120228208 | INTERCONNECTOR FOR FILTRATION APPARATUS WITH REDUCED PERMEATE PRESSURE LOSS - An interconnector coupling permeate conduits in a filtration apparatus includes a diverging section. The diverging section defines a generally increasing cross sectional area for the permeate solution exiting the interconnector in a direction of flow from the permeate conduit of a first separation element to a permeate conduit of a second separation element. The diverging section provides a more gradual divergence of the permeate solution to reduce pressure losses. | 09-13-2012 |
20130098829 | SPIRAL WOUND MEMBRANE ELEMENT AND PERMEATE CARRIER - A permeate carrier for a spiral wound membrane element has two or three layers, for example of tricot construction. The two outer, or only, layers resist movement of the membrane sheet into permeate channels in the permeate carrier. The total thickness of the permeate carrier sheet may be similar to the thickness of typical tricot permeate carrier sheets. The permeate carrier sheet may be coated to make its surfaces hydrophilic. The coating may be, for example, a cross-linked polyvinyl alcohol (PVA) or polyvinyl pyrrolidone (PVP). In the spiral wound element, a permeate carrier sheet may be wrapped in one or more layers around a central tube. Channels in the permeate carrier sheet are oriented helically relative to a longitudinal axis of the central tube. | 04-25-2013 |
20130101797 | SPIRAL WOUND MEMBRANE PERMEATE CARRIER WITH THIN BORDER - A permeate carrier to be described in detail below has side edges, alternatively called borders, that are thinner than a central part of the permeate carrier. Adhesive is applied to the side edges to form a seal when a membrane leaf is formed around the permeate carrier. After the membrane leaf is wound around a central tube, the side edges extend in a spiral around the central tube. The transition between the side edges and the central part of the permeate carrier helps prevent adhesive from flowing into the central part of the permeate carrier. The reduced thickness of the side edges also reduces an increase in diameter at the ends of an element that might otherwise be caused by the adhesive. | 04-25-2013 |
20130146531 | FEED SPACERS FOR SPIRAL WOUND MEMBRANE ELEMENT - A feed channel spacer for a spiral wound membrane element has inlet and outlet edges that are thinner than the rest of the spacer material. The edges may be made thinner, for example, by passing the edges of a sheet of feed spacer material through a pair of hot rollers or by compressing the edges of the sheet in a heated press. The thinned edges of the feed spacer material are located in the element between glue lines applied to the permeate spacers of the element. The thin edges allow a greater membrane surface area to be provided in a given element diameter. A feed channel spacer may also have an area with obstructions to create micro-mixing effects. These obstructions may be provided on a feed spacer sheet of constant thickness, or one with thin edges. | 06-13-2013 |
20130146532 | FEED SPACER FOR SPIRAL WOUND MEMBRANE ELEMENT - A feed channel spacer for use in a spiral wound membrane element provides a series of generally parallel interior channels. The interior channels extend from an inlet side of the spacer to an outlet side of the spacer, but follow an undulating or zigzagging path. Dean's vortices or other flow patterns that cause mixing reduce concentration polarization. The feed channel spacer is made by pressing a sheet of thermoplastic material in a die. | 06-13-2013 |
20130146540 | SYSTEM AND PROCESS FOR TREATING WATER AND SPIRAL WOUND MEMBRANE ELEMENT - A spiral would membrane element has a feed channel spacer providing a tortuous feed flow path through an open spacer mesh material. The feed flow path may force the feed liquid to flow across substantially all of an adjacent membrane surface. The length of the flow path and average cross-flow velocity are increased relative to a straight flow path. A rise in pressure drop that might otherwise be produced by the increased average cross-flow velocity is reduced by the open spacer mesh. In a system having two or more upstream and downstream spiral wound membrane elements, a downstream element may have a feed channel spacer providing a tortuous flow path while an upstream element has a feed channel spacer providing a less tortuous flow path or a straight flow path. | 06-13-2013 |