51 results about "Spiral membrane" patented technology

The present invention provides a spiral membrane element suitable for suppressing an increase in a pressure loss of a permeated fluid during operation, especially when a feed fluid is supplied at a high pressure. A spiral membrane element of the present invention includes a central tube and a membrane leaf. In the membrane leaf, a surface A1 of a first permeation spacer has grooves a and projections c. A surface B1 of a second permeation spacer has grooves b and projections d. In the spiral membrane element, at least one condition selected from the group consisting of condition (a) and condition (b) is satisfied.

The present invention is intended to provide a spiral membrane element, a permeation spacer, and a membrane separation method. A spiral membrane element includes a central tube and a membrane leaf. The membrane leaf has a separation membrane and a permeation spacer. The permeation spacer has a plurality of grooves and a plurality of projections on one surface thereof. The grooves and the projections each extend in a first direction and are arranged in a second direction perpendicular to the first direction on the surface. When the groove has a width defined as W1 and the projection has a width defined as W2 in the second direction and the projection has a height defined as H, 9.1≤1000×{(W1 / W2) / H}<18.2 is satisfied, where W1, W2, and H are in unit of μm.

Provided is a method for dehydrating a spiral membrane element, which can effectively remove moisture contained in a used spiral membrane element by a simple method. The method for dehydrating a spiral membrane element according to the present invention is a method for dehydrating a spiral membrane element E that contains moisture, the spiral membrane element E having a winding body and a perforated center tube, the winding body including a plurality of membrane sheets wound on the center tube and having a permeation-side flow path inside. Furthermore, the method for dehydrating a spiral membrane element according to the present invention includes a step of forming an opening (for example, an end face opening formed by a cut surface 16) that communicates the permeation-side flow path with the outside on the plurality of membrane sheets, and a step of applying a centrifugal force to the spiral membrane element on which the opening is formed.

The application discloses a seawater desalination roll type membrane device based on a biomimetic flow guide net. Multilayer hollow cylindrical reverse osmosis membranes are coaxially arranged in the inside of a reverse osmosis membrane assembly, an annular cavity is formed between every two adjacent reverse osmosis membranes, a hollow cylindrical biomimetic flow guide net is arranged in each annular cavity, the biomimetic flow guide net is coaxially arranged with the reverse osmosis membrane and is located on the central ring line of the annular cavity; liquid to be desalinated is flowed into the reverse osmosis membrane assembly from an inlet, is desalinated by the reverse osmosis membrane and the biomimetic flow guide net, and is finally flowed out of the reverse osmosis membrane assembly from an outlet; a plurality of biomimetic flow guide units of the biomimetic flow guide net are arranged in a longitudinal and transverse staggered mode, and each biomimetic flow guide unit is mainly composed of a plurality of flow guide columns in an elliptical cylindrical structure and is sequentially connected. The application has the advantages of simple structure, high reliability, easy manufacturing and good popularization value, and the structure can further improve the water production efficiency of the roll type membrane assembly and reduce the production cost of a water treatment plant.

The invention relates to the technical field of aromatic hydrocarbon separation and purification, in particular to a system and process flow for removing C8 non-aromatic hydrocarbon in xylene through membrane separation, and the system comprises a membrane separation unit, a feeding unit, a permeation side system, an interception side system, an adsorption tower feeding buffer tank outlet line and a crossover line; the membrane separation unit is provided with a membrane feeding pipeline, one end of the membrane separation unit is connected to an outlet of the membrane separation feeding buffer tank, and the other end of the membrane separation unit is connected to an inlet side pipe orifice of the separation pipeline; a membrane feeding booster pump is arranged on the membrane feeding pipeline; a spiral-wound membrane assembly is arranged in the separation pipeline; the feeding unit is provided with a xylene redistillation tower top outlet line which is connected to an inlet of the membrane separation feeding buffer tank from the xylene redistillation tower top. According to the membrane separation process adopted by the method, the non-aromatic hydrocarbon removal rate can be more than 98% under the operation conditions that the feeding pressure is 1.68 MPa, the permeation side is 20 kPa and the interception side is 1.6 MPa, and the method has definite industrial feasibility and technical advantages.

The present invention provides a new spiral membrane element suitable for recovering a permeated fluid efficiently. A spiral membrane element of the present invention includes: a central tube; a separation membrane that is wound around the central tube and separates a feed fluid into a permeated fluid and a non-permeated fluid; and a feed space and a permeation space separated from each other by the separation membrane. The permeation space communicates with an outer space of the spiral membrane element via an outer circumferential surface of the spiral membrane element.

The utility model discloses a water treatment spiral-wound membrane module with self-scale inhibition capability. The water treatment spiral-wound membrane module comprises a spiral-wound membrane unit, an outer protective shell made of a conductive material or a strong magnetic material, an end cover and a central pipe, end covers are mounted at two ends of the outer protective shell; a plurality of radial through holes are uniformly distributed on the circumference of the central tube; the central tube is coaxially positioned in the inner cavity of the outer protective shell; two ends of the central tube are fixedly connected with end covers; two ends of the spiral-wound membrane unit directly face second through holes of the end covers, the outer wall is attached to the outer protective shell, and the inner wall covers the outer wall of the central pipe; when the end cover is made of a conductive material, a plurality of electric contacts are symmetrically mounted on two sides of the end cover, the electric contacts on two sides are electrically connected with an alternating current power supply or a direct current power supply, raw water is continuously concentrated along the radial direction of the spiral-wound membrane unit, and a strong electromagnetic field can activate water molecules and prevent ions from forming crystals, so that scales cannot be attached to the spiral-wound membrane unit. The utility model has the effects of no scaling for a long time, high energy consumption, high operation efficiency and long service life.

The present invention provides a spiral membrane element suitable for suppressing a decrease in a permeation rate (or a permeation flux) of a permeated fluid from a separation membrane. A spiral membrane element of the present invention includes: a central tube; a membrane leaf that has a separation membrane and a permeation spacer and is wound around the central tube; and a flow passage spacer that is connected to the permeation spacer and is wound around the central tube on a side closer to the central tube than the membrane leaf is. A pressure loss of the flow passage spacer measured by a predetermined test is smaller than a pressure loss of the permeation spacer.

A spiral membrane element includes: a plurality of membrane leaves each having a permeation-side spacer interposed between separation membranes facing each other and having both-side sealing parts and a peripheral-side sealing part that seal both-side ends and a peripheral-side end in an axial direction; a supply-side spacer interposed between the membrane leaves; and a perforated central pipe around which the membrane leaves and the supply-side spacers are wound. The permeation-side spacer in the membrane leaves has a tear processing part over the entire width on a peripheral side from the center.

Provided is a membrane separation device suitable for suppressing deterioration of the sanitary state inside the membrane separation device. The membrane separation device is provided with a spiral membrane element. The membrane element comprises a central tube having a through-hole, and a membrane leaf wound around the central tube, the membrane leaf having a pervaporation membrane for separating a fermentation broth containing a volatile organic compound into a permeable fluid and a non-permeable fluid. During operation of the membrane separation device, inflow of a non-permeable fluid into a space adjacent to the outer peripheral surface of the membrane element is prevented.

Printed spacer membrane elements have the unique advantage of being able to impart any pattern to the membrane surface to act as a feed spacer material, in contrast to conventional feed spacer mesh materials, which are uniform in thickness and density throughout the mesh. They allow for closer spacing between membrane sheets in the feed space while utilizing more open feed space, which allows more membrane sheets to be wrapped around the membrane element, resulting in more permeate flow while simultaneously reducing pressure drop from the feed end to the reject end of the element. The unique design features of the printed spacer dramatically improve the performance of the membrane element, in contrast to prior art feed spacer mesh elements.

The utility model provides a spiral-wound membrane assembly and water purification equipment with the spiral-wound membrane assembly, the spiral-wound membrane assembly comprises a water collecting pipe, a first membrane unit and a second membrane unit, the first membrane unit and the second membrane unit are wound on the water collecting pipe, the first membrane unit is provided with a first water inlet and a first flow channel which are communicated, and a waterproof membrane is arranged in the second membrane unit; the interior of the second membrane unit is divided into a second flow channel and a third flow channel by the waterproof membrane, the first flow channel is communicated with the second flow channel, the second flow channel is communicated with the third flow channel, and a first water outlet is formed in the tail end of the third flow channel. According to the scheme, the second membrane unit comprises two surfaces, raw water flows between the two surfaces along the direction perpendicular to the water collecting pipe, and the direction change does not exist in the flowing process, so that the flow rates of the surfaces of the membrane units are the same, and a low-flow-rate region basically does not exist, so that the service life of the RO under different recovery rates can be prolonged, the dead zone problem of the second membrane unit is effectively improved, and the service life of the RO is prolonged. And the concentration polarization degree is effectively reduced.

A spiral membrane element includes: a plurality of membrane leaves each having a permeation-side spacer interposed between separation membranes facing each other and having both-side sealing parts and a peripheral-side end that seal both-side ends in an axial direction; a supply-side spacer interposed between the membrane leaves; and a perforated central pipe around which the membrane leaves and the supply-side spacers are wound, wherein a folded part of an inner surface of each of the membrane leaves and a peripheral-side tip of the permeation-side spacer are not fixed to each other in at least one the peripheral-side end.

According to the present invention, a spiral membrane element in which the durability of a bonding part between a membrane leaf and a central pipe is improved, and the central pipe is more easily separated and collected at the time of recycling. The spiral membrane element includes: a plurality of membrane leaves each having a permeation-side flow-channel between separation membranes facing each other; and a perforated central pipe around which the membrane leaves are wound with a supply-side flow-channel interposed between the membrane leaves. The spiral membrane element includes a bonding part in which each of both-side ends in an axial direction among inner peripheral-side ends of the membrane leaves is bonded to the central pipe, and the central pipe includes a tapered part having a peripheral surface whose diameter expands toward a center side in the axial direction in at least a partial area of the bonding part.

A kind of equalizing air intake spiral membrane module box, including air intake pressure structure, channel structure and box structure;The air intake pressure structure includes first shell, with first port and second port;The first port is equipped with first sealing baffle, the top of the first sealing baffle is equipped with rectangular air inlet;The channel structure includes second shell, with third port and fourth port;The third port is equipped with second sealing baffle, the fourth port is equipped with air equalizing block between the second port;Several evenly distributed transverse air passages are arranged in the air equalizing block;Rectangular adjusting plate is arranged in the second shell, the height of the adjusting plate gradually increases from the fourth port to the third port;The top plate of the second shell is equipped with several through holes, the top of each through hole is fixedly provided with spiral membrane module, and each through hole is connected with the air inlet end of corresponding spiral membrane module;The box structure includes third shell opening downward, is fixed to the top of the second shell, and covers each spiral membrane module.

A gas separation membrane 10 comprising a polyimide resin 1 and scaly filler 2. The scaly filler may be at least one of mica, silica, boron nitride or a glass flake and may be present at a concentrati

To provide a filtration device which can increase of an amount of a filtrate.SOLUTION: A filtration device includes a spiral membrane module 10. The membrane module includes: an element in which a filtration membrane is wound around a winding axis extending in a predetermined direction; and a container which houses the element. The container includes a first container 110 and a second container 210 disposed at one side in the predetermined direction of the first container. The element includes: a first element 120 housed in the first container; and a second element 220 housed in the second container. The first container includes: a first outlet 114b of a filtrate, and the second container includes a second outlet 214b of the filtrate.SELECTED DRAWING: Figure 3

The utility model discloses a spiral membrane vacuum tower of high -efficient removal lubricating oil gas relates to lubricating oil processing technical field, the utility model discloses a base, the top outer wall fixedly connected with support plate of base, the utility model discloses a turbine agitator and spiral flow guide groove are set up, and the contact area of liquid and the inside of flow -through pipe is increased through spiral flow guide groove in the flow -through pipe, and because the turning of turbine agitator and spiral flow guide groove is opposite, the shear force produced when the rotation of two can tear liquid into small pieces, thereby extruding the tiny bubble in liquid, reach the shear force produced when turbine agitator and spiral flow guide groove rotate in the jar extrude the tiny bubble in liquid, prevent the emergence because traditional degassing jar relies on the rotation of stirring part and increase its contact area with liquid, thereby extruding gas, but the extrusion area of stirring part and liquid is limited, lead to the oil gas efficiency of device to liquid is not good, and the problem such as not thorough degassing.

The application discloses a kind of spiral membrane element and its preparation method, the spiral membrane element includes spiral layer structure and water collection center pipe, the spiral layer structure includes water production flow channel cloth, first membrane, concentrated water flow channel cloth and second membrane, the water collection center pipe is placed between the water production flow channel cloth and the first or second membrane, the water collection center pipe is directly contacted with the first or second membrane and is fused;The water production flow channel cloth is placed between the first membrane and the second membrane, the upper and lower surfaces of the water production flow channel cloth respectively include first edge, second edge and third edge not provided with water collection center pipe, the first edge, second edge and third edge of the upper and lower surfaces of the water production flow channel cloth are directly contacted with the first membrane and the second membrane and are fused to form water production membrane bag.The spiral membrane element of the application has narrower connection area than traditional membrane element, and can obtain larger effective membrane use area under fixed shape.

This invention discloses an overflow-proof microbial wastewater treatment tank, comprising a tank body, a corridor, an exhaust mechanism, and a double-layer folded membrane mechanism. The double-layer folded membrane mechanism includes an upper plate and a lower plate, both inclined. The lower plate rotates circumferentially around the center of the tank body, pulling the double-layer folded membrane mechanism to unfold and form an inverted conical spiral membrane that seals the upper part of the tank body. The exhaust mechanism uses wind and water flow to discharge waste gas from the lower part of the double-layer folded membrane mechanism. This invention effectively prevents tank water overflow and reduced microbial activity caused by heavy rain, maintaining continuous wastewater treatment and reducing subsequent treatment and production cost losses due to heavy rain.

The present invention is intended to provide a spiral membrane element, a permeation spacer, and a membrane separation method suitable for suppressing an increase in a pressure loss of a permeated fluid during operation, especially in the case of membrane separation in accordance with a decompression type. A spiral membrane element 10 includes a central tube 21 and a membrane leaf 11. The membrane leaf 11 has a separation membrane 12 and a permeation spacer 14. The permeation spacer 14 has a plurality of grooves a and a plurality of projections b on one surface A1 thereof. The grooves a and the projections b each extend in a first direction X and are arranged in a second direction Y perpendicular to the first direction X on the surface A1. When the groove a has a width defined as W1 and the projection b has a width defined as W2 in the second direction Y and the projection b has a height defined as H, 9.1 ≤ 1000 × {(W1 / W2) / H} < 18.2 is satisfied, where W1, W2, and H are in unit of µm.

By adjusting the amount of residual functional groups on the front and back surfaces of the separation functional layer, we provide a composite semipermeable membrane with further improved alkali resistance, and a spiral-type membrane element using the same. [Solution] A composite semipermeable membrane comprising a separation functional layer, wherein the separation functional layer contains a polyamide resin, the surface functional group ratio A and the back surface functional group ratio B satisfy the relationship A / B ≤ 3.0, and the carboxyl group concentration x and the amino group concentration y satisfy the relationship x + y ≤ 0.015. The surface functional group ratio A is a value calculated as A = x / y, where x is the carboxyl group concentration relative to the total carbon amount and y is the amino group concentration relative to the total carbon amount when the surface of the separation functional layer is measured by the ESCA gas phase modification method, and the back surface functional group ratio B is a value calculated as B = X / Y when the back surface of the separation functional layer is measured in the same manner.

Provided is a novel separation membrane suitable for a membrane separation device (particularly a spiral membrane element). This separation membrane (10) is provided with a separation functional layer (1), a porous support (3) that supports the separation functional layer (1), and an intermediate layer (2) that is arranged between the separation functional layer (1) and the porous support (3). The porous support (3) has a surface (S1) facing the intermediate layer (2). The load area ratio Smr (c1) of the surface S1 as determined by the following test is less than 80%. And a test: performing three-dimensional analysis on the surface S1 of the porous support body 3 to obtain a load curve specified in JIS B0681-2: 2018. In the load curve, a height (c1) at which the difference from the height (c0) when the load area ratio is 0% coincides with the thickness of the intermediate layer (2) is determined. A load area ratio corresponding to the height c1 is read and determined as a load area ratio Smr (c1).

Installation for the pressurised filtration of liquid with a view to producing drinking water, comprising at least one membrane-based drinking-water production unit (MPU), each MPU comprising: a plurality of filtration blocks each containing a bundle of pressure tubes mounted in parallel, each pressure tube accommodating at least two membrane-based filtration modules with spiral membranes or hollow-fibre membranes mounted in series, means (20) for feeding the liquid that is to be filtered, means for removing the filtered liquid, and means (30) for removing the concentrate, characterised in that the membranes of the filtration modules are of at least two different types selected from the group consisting of reverse-osmosis membranes and low-pressure reverse-osmosis membranes (4-6), on the one hand, and nanofiltration membranes (1-3) on the other hand, and in that at least one MPU comprises means (21-26) making it possible to alter the order in which the blocks of pressure tubes that it groups together are supplied with fluid. The method consists in supplying the filtration blocks of at least one MPU in a first order of supply in which the tubes containing nanofiltration membranes are at the head of the MPU and then in supplying the pressure tubes in a second order of supply in which the pressure tubes containing reverse-osmosis membranes or low-pressure reverse-osmosis membranes are at the head of the MPU.

The utility model discloses an end cover for fixing a spiral-wound membrane element. The end cover comprises an inner ring structure and an outer ring structure, wherein the inner ring structure and the outer ring structure are arranged layer by layer from inside to outside and share a circle; the inner ring structure and the outer ring structure are connected through the middle oval ring body and the multiple special-shaped connecting rib plates, one end of each special-shaped connecting rib plate is connected with the inner ring structure, and the other end of each special-shaped connecting rib plate is connected with the intersection point of the middle oval ring body. The end cover structure for fixing the spiral-wound membrane element is optimized, and the elliptical ring body and the special-shaped connecting rib plates are arranged between the inner ring structure and the outer ring structure, so that on one hand, the end cover rib plates are more uniformly distributed on the whole end surface, the stress of the membrane is more uniform, and the risk of deformation of the membrane is reduced; the overall rib plate layout is approximately triangular, so that the overall structure of the end cover is more stable, and the risk of deformation of the end cover is reduced.

The present invention provides: a composite semipermeable membrane with which desired blocking performance is achieved and in which both contamination resistance and high water permeability are exhibited; and a spiral-type membrane element in which the composite semipermeable membrane is used. The present invention is a composite semipermeable membrane comprising a porous support, a separation function layer formed of a polyamide-based resin on the porous support, and a coating layer that covers the separation function layer and contains a cationic polymer, the composite semipermeable membrane being characterized in that: the polyamide-based resin contains a constituent component derived from m-phenylenediamine (MPD) and trimesic acid chloride (TMC), the molar ratio (TMC / MPD) of the TMC to the MPD being within the range of 0.65-1.00; and the separation function layer in a state of being covered by the coating layer has a surface roughness Ra1 of 85-150 nm as measured in a region measuring 5 μm × 5 μm using an atomic force microscope (AFM) in water.

This invention provides a spiral-type membrane element that improves the durability of the bonding joint between the membrane leaf and the central tube, while also facilitating the separation and recovery of the central tube during recycling. [Solution] A spiral membrane element E comprising a plurality of membrane leaves L having permeable channels between opposing separation membranes, and a perforated central tube 5 around which the membrane leaves L are wound with supply channels interposed between the membrane leaves L, wherein both ends of the inner circumference side of the membrane leaves L in the axial direction A1 are bonded to the central tube 5, and in at least a portion of the area of ​​the bonded channel 13, the outer circumference surface of the central tube 5 has a tapered portion 5b that widens toward the center in the axial direction A1.

The present invention provides a membrane separation device suitable for suppressing deterioration of hygienic conditions inside a membrane separation device. The membrane separation device includes a spiral membrane element. The membrane element includes: a central tube having a through hole; and a membrane leaf wound around the central tube and having a pervaporation membrane that separates a fermented liquid containing a volatile organic compound into a permeated fluid and a non-permeated fluid. A flow of the non-permeated fluid into a space adjacent to an outer circumferential surface of the membrane element is blocked during operation of the membrane separation device.

To provide a spiral separation membrane element which can be suppressed from deteriorating in performance by preventing a membrane thereof from being scratched in a step of preparing the separation membrane element.SOLUTION: A spiral separation membrane element comprises at least a water collecting pipe, a separation membrane, a supply-side flow path material and a transmission-side flow path material. On a cross section that is perpendicular to a shaft direction of the water collecting pipe of the spiral separation membrane element, a height at an inner periphery side of a supply-side flow path F formed of the separation membrane positioned on a straight line connecting a center of the water collecting pipe to an arbitrary outer periphery and the supply-side flow path material is larger than a height at an outer periphery side thereof.SELECTED DRAWING: Figure 5