118 results about "Permeable channel" patented technology

A filtration apparatus for filtering liquid has a filtration cell having generally vertical front and rear panels spaced apart to define a cell length, and generally vertical side panels extending between the front and rear panels and spaced apart to define a cell width. A plurality of header segments are provided in the cell, each header segment having a permeate channel. A plurality of hollow fiber membranes are associated with each header segment and extend generally upright between the cell panels, each membrane having a lumen in flow communication with the permeate channel of the associated header segment and a lower end secured to the associated header segment and a loose upper end.

A membrane has a permeate channel including a 3D spacer fabric having an upper and a lower fabric surface (2,3) spaced apart by monofilament thread (4) at a predefined distance, the permeate channel being interposed between two membrane layers (12, 13), wherein the membrane layers are linked at a multitude of points with the upper and lower fabric surfaces to form an integral structure with a high bonding strength suitable for backflush operations. A method provides an integrated permeate channel membrane, including the steps of:—Providing a 3D spacer fabric having an upper and lower surface fabric (2,3) spaced apart by monofilament thread (4) at a predefined distance; and—Applying a membrane layer to both the upper and the lower surface fabric.

Cross-flow filters having improved uniformity in transmembrane pressures and consequent much greater flux are provided by the installation of barriers in permeate channels.

A sealing element is suggested, in particular one for closing primary packaging for medications, that has at least two parts, which touch each other at least in some areas. This is characterized in that steam-permeable channels are provided for sterilization of the contact surfaces. In addition, a method is suggested for manufacturing a syringe system with a sealing element. This is characterized by the steps—preliminary assembly of the sealing element, —sterilization of the sealing element, —final assembly of the sealing element.

The invention discloses a chemical oil displacing method for an oil reservoir after the polymer oil displacement, which belongs to the technical field of the oil field oil displacement. The chemical oil displacing method comprises the following steps: injecting a first substance into a target oil reservoir, and sealing an advantageous permeable channel of the target oil reservoir; injecting a second substance into the target oil reservoir to pre-adsorb the target oil reservoir; injecting a third substance into the target oil reservoir to adjust an adsorption profile of different permeable layers of the target oil reservoir, enlarge an involved volume and improve the oil displacing efficiency; and injecting a fourth substance into the target oil reservoir to prevent the third substance frombeing diluted. According to embodiments of the invention, the first substance, the second substance, the third substance and the fourth substance are successively injected into the oil reservoir at different phases, so that the substances injected at different phases can be cooperated with one another to have a synergistic effect, an oil displacing mechanism combining the blocking, controlling and displacing of the oil reservoir after the polymer displacement can be formed, and by adopting the embodiments of the invention, the recovery ratio of the oil reservoir after the polymer displacementcan be effectively improved.

An improved apparatus and method for gravel packing is provided. The apparatus includes a substantially tubular-shaped base pipe having a plurality of apertures disposed along part of its length and a dual-wall sand screen coaxially secured to the base pipe. The dual-wall screen is substantially permeable to fluids and impermeable to sand. The apparatus provides a plurality of fluid permeable channels formed within the sand screen, which are disposed along the entire length of the screen. Each channel has an associated plurality of ports spaced along discrete intervals of the screen, which communicate with an annulus formed between the apparatus and the wellbore. The method provides for injecting a sand and fluid slurry mixture through the screen and out of the ports. This design reduces the incidence of sand bridge formation, and packs gravel around any sand bridges, which may be formed.

The invention belongs to the technical field of permeable paving, and particularly discloses a permeable paving system and a paving method for removing oil stain in runoff rainwater. The permeable paving system structurally comprises a permeable layer, a leveling layer, a microorganism layer, a permeable geotextile layer and a permeable base layer from top to bottom. The permeable layer is used for quickly permeating the rainwater and primarily filtering the rainwater; the leveling layer is used for cushioning and permeating water; the microorganism layer is used for adsorbing and removing the oil stain in runoff, so that permeable channels can be prevented from being blocked by the oil stain, or the oil stain can be prevented from being permeated into underground water; the permeable geotextile layer is used for permeating the permeated water of the system and preventing loss of microorganisms; the permeable base layer is used for isolating natural soil from the permeable paving system and preventing the natural soil from being spread in the microorganism layer. The paving method includes excavating roadbeds; sequentially laying the permeable base layer, the permeable geotextile layer, the microorganism layer, the leveling layer and the permeable layer. The permeable paving system and the paving method have the advantages that the microorganisms can be regularly added into the permeable paving system, so that the content of the microorganisms can be guaranteed; the oil stain in the runoff rainwater can be effectively removed, the permeable paving system and the paving method are low-carbon, green and environmentally friendly and are wide in applicability, and energy can be saved.

The invention provides a drainage consolidation method for a soft foundation. The drainage consolidation method for the soft foundation is characterized by comprising the following steps that firstly,a drainage consolidation area is divided into a plurality of sub-areas; secondly, on the boundaries of the sub-areas, vertical geomembrane impermeable layers perpendicular to the ground are constructed; thirdly, a plurality of first sand layers and second sand layers are constructed in bottom soft soil, and in this way, permeable channels intersecting longitudinally and transversely on a horizontal plane are formed; fourthly, a plurality of sand wells or drain boards are at least constructed on the first sand layers and the second sand layers located on the inner layer, and a vertical water draining structure with the bottom embedded in the permeable channels is formed; and fifthly, a plurality of water collecting wells are constructed at least on the first sand layers and the second sandlayers located on the outer layer, the adjacent water collecting wells in the length direction are located on the two adjacent second sand layers separately, the multiple first sand layers are arranged between the adjacent water collecting wells in the width direction at intervals, the bottoms of the water collecting wells are embedded into the permeable channels, then water in the water collecting wells is drained out, water draining of the sub-areas is completed, and solidification of soil is accelerated.

The invention discloses a preparation method of synthetic leather. The preparation method of the synthetic leather comprises the following steps: firstly, impregnating a cloth base with a first polyurethane composition added with a pore-foaming agent; and followed by eluting the pore-foaming agent agglomerated on the cloth base with an eluent, and thus forming gaps in the cloth base agglomerated with a polyurethane layer, wherein the pore-foaming agent is dissolved in the first polyurethane composition and also dissolved in a high-molecular polymer of the eluent. In the preparation method of the synthetic leather, the pore-foaming agent is added in the first polyurethane composition impregnating the cloth base, at a later stage, the pore-foaming agent agglomerated on the cloth base is eluted, therefore, the gaps are formed in the cloth base after the pore-foaming agent is eluted, the gaps form a moisture permeable channel, and the high moisture permeability effect can be improved; and moreover, the eluting of the pore-foaming agent belongs to micro-particles, the cloth base and an overall connection face of polyurethane attached to the cloth base surface are not affected, and mechanical properties of the synthetic leather cannot be reduced.

An air-conditioning system for a seat includes a cushion having a cover and two air-conditioned zones proximate a surface facing a seat occupant, and an elongated depression between the zones, the depression having a floor which is recessed with respect to the zones and into which the cover is at least partially drawn into in the direction of the depression floor, the air-conditioned zones being at least partially distanced from the depression. The zones and the depression are connected by a plurality of air-permeable channels, the channels being located between the air-conditioned zones essentially on or above the depression floor. The depression, in the transverse direction, is at least partially air-permeable, despite the cover.

The invention discloses a cofferdam construction method for a deepwater hard rock back-cover-free steel plate pile. The cofferdam construction method comprises the following steps of: 1) during bearing platform drilling pile construction, synchronously constructing cofferdam construction stable piles which are positioned at the four corners of a cofferdam and on the middle part of the long side ofthe cofferdam; 2) performing lead hole slotting operation after construction for drilling the stable piles and a bearing platform pile foundation is completed; 3) dismounting a drilling platform, andmounting a Z-shaped bottom-support bracket of inner support; 4) utilizing a crane for stacking and dropping inner support to designed elevation in a layered mode; 5) welding a grouting tube at the inner side of a bottom slot hole of the steel plate pile, and infiltrating the bottom of the steel plate pile to a slotting area; 6) after the cofferdam is formed, pouring cement paste into a grouting tube for sealing a water permeable channel on the bottom of the cofferdam; 7) adopting large-power water pumping equipment to forcibly pump water and stop leakage; 8) converting inner support dead loadto the side wall of the cofferdam from the Z-shaped bottom-support bracket in a water pumping process, and connecting cofferdam edges to the stable piles; and 9) after water pumping is ended, dismounting the Z-shaped bottom-support bracket, starting excavation operation and the like. The cofferdam construction method can be applied to replace most of a double-wall steel cofferdam construction scheme, so that temporary cofferdam engineering amount is greatly saved, and application range of the steel plate pile cofferdam technology is greatly expanded.

A hydraulic valve for a cam phaser including a valve housing with a longitudinal axis and a valve piston that is axially moveable along the longitudinal axis, wherein the valve piston opens and closes a first operating connection of the valve housing and a second operating connection of the valve housing, wherein the first operating connection and the second operating connection are axially offset from one another; and a supply connection of the valve housing which is used for supplying the hydraulic valve with a hydraulic fluid fed by a feed device, wherein the hydraulic valve is configured to be flowed through by the hydraulic fluid on different paths controlled by a flow permeable channel system of the valve piston, and wherein a check valve opening and closing an inflow channel is arranged in the hydraulic valve in the inflow channel of the valve housing.

A method for simulating a dam break process caused by seepage failure of a tailing pond dam body comprises the steps that firstly, two-dimensional seepage stability analysis is conducted on a tailingdam according to dam body material mechanics parameters, upstream and downstream water levels and other information, and the position of a seepage channel is preliminarily planned; constructing a tailing dam seepage failure breach development numerical model, simulating a seepage failure breach development process and determining a critical condition of seepage channel collapse; and finally, simulating the overtopping outburst process after collapse of the permeation channel by utilizing fluid mechanics analysis software, so as to realize dynamic simulation of the permeation failure process ofthe whole tailing pond dam body. The method has the advantages of being high in pertinence, low in cost, easy to operate, good in result visualization and the like; by means of the method, the specific situation of dam break downstream disaster caused by seepage failure of the tailing pond dam body can be obtained, a basis is provided for government decision departments and related design units to scientifically and reasonably formulate tailing pond burst emergency plans and rescue and remedial measures, and therefore losses caused by tailing pond burst are reduced, and accident risks are reduced.

A filter element includes an integrated permeate channel membrane (4) which has a flexible structure and includes an upper and lower membrane layer and a substrate material for supporting the membrane layers. The substrate is a 3D spacer fabric having an upper and a lower fabric surface, tied together and spaced apart by monofilament threads at a predefined distance. A frame system supports the membrane and sealing the integrated permeate channel at the edge of the membrane. The frame system includes a first frame profile and a second frame profile each of them having form and dimensions capable of surrounding the membrane. Each of the first and second frame profiles has inner parts and outer parts with the membrane (4) interposed between the first frame profile and the second frame profile. A filter module includes filter elements.