39results about How to "Maintain separation performance" patented technology

A system, method and device are disclosed for bio-processing a feed stream and providing a constant output by operating a continuous single-pass tangential-flow process. The single-pass process provides high conversion concentration while operating at relatively low feed flow rates, and the process can also be used to provide constant output diafiltration.

The invention discloses a method for preparing a graphene-quantum-dot-doped organic-solvent-resistant ultrafiltration membrane, the ultrafiltration membrane prepared by method and application of the ultrafiltration membrane. According to the method, graphene quantum dot nanoparticles are added in the preparation process of a polymer polyimide ultrafiltration membrane, and the graphene-quantum-dot-doped polyimide ultrafiltration membrane is modified by crosslinking with ethylenediamine to prepare the graphene-quantum-dot-doped organic-solvent-resistant polyimide ultrafiltration membrane. The graphene quantum dots are used in the preparation process of the ultrafiltration membrane for forming an organic / inorganic hybrid membrane, the quantum effect of the graphene quantum dots is fully used, flux of the prepared ultrafiltration membrane is increased significantly, the mechanical properties of the membrane are significantly improved, organic solvent resistance of the membrane is greatly enhanced, and the retention rate basically keeps stable; and the preparation method is simple in process, and low in cost, and has good application prospects in industrial organic solvent system separation.

The present invention relates to a cyclone separation device for separating particles from air and a cyclone vacuum cleaner (80). It has the objective to reduce noise without impairing the dirt separation performance. This is achieved an arrangement comprising a cyclone chamber (10), a dirt collecting chamber (50) arranged adjacent to the cyclone chamber (10) for collecting dirt particles separated from air, a dirt-duct (40) between the cyclone chamber (10) and the dirt collecting chamber (50) for allowing dirt particles to pass from the cyclone chamber (10) towards the dirt collecting chamber (50), and an air- guide (60) arranged adjacent to the dirt-duct (40) for reducing the momentum of the air in the dirt-duct (40).

A device capable of supplying an internal combustion engine 60 with a first fuel F1 of a high octane number fuel, and a second fuel F2 of a low octane number fuel or a raw fuel F0. The device is equipped with a cooling medium circulating path LL configured to perform heat exchange between a cooling medium for cooling the internal combustion engine 60 and a separator 20. The device adjusts a flow rate of the cooling medium in the cooling medium circulating path LL, so that a separator temperature T1 is contained in a predetermined temperature range, according to T1, a raw fuel temperature T2 and a cooling medium temperature T3.

The invention relates to a capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane, which is prepared through the steps of mixing capsaicin functional-group containing polymers with a hydrophilic agent and a membrane casting solution; then, carrying out treatment on the obtained mixture by using an immersion phase inversion method. Based on the biological resistance of natural antifouling active substances existing in nature, and through the addition of an appropriate hydrophilic agent, the invention provides a method for preparing a capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane. An ultrafiltration membrane prepared by using the method disclosed by the invention is applicable to a water treatment process, so that both the separation performance of the membrane is ensured, and the anti-biological-contamination performance of a membrane module is significantly improved.

The fixing device and image forming apparatus employ a horizontally moving claw for separating a sheet on which a toner image has been fixed. The claw moves in a horizontally reciprocating manner at a velocity between 0.001 mm / seconds to 0.1 mm / seconds. Moving at that speed, it has been found to reduce scratching of the fixing drum. The device and image forming apparatus also employ a claw having a width between 1.0 mm and 5.0 mm. The claw contacts the drum with a pressure in a range of 3.0×9.8 mN to 7.0×9.8 mN.

The invention relates to a sulfur-containing ether polyamine as well as a preparation method and application thereof, a chlorine-resistant anti-oxidation sulfur-containing ether separation membrane and a preparation method thereof, and belongs to the field of macromolecule materials. The invention provides a preparation method of sulfur-containing ether polyamine. The preparation method comprisesthe following steps: preparing a semi-aromatic poly-halogenated amide monomer; purifying a crude product of the semi-aromatic poly-halogenated amide monomer; preparing a sulfur-containing ether polyamine monomer; purifying a sulfur-containing ether polyamine solution. Polyamine with a reducing group of a high content, namely a sulfur ether (-S-), is synthesized for a first time, the reducing sulfur ether structure of the high content is capable of reacting with active chlorine, and most oxidative chlorine in a separation membrane oxidation treatment process can be consumed; meanwhile, by virtue of multiple amino groups and acyl chloride in a molecular chain, a multi-crosslinking structure can be formed, and the strength of an interface separation layer can be further improved, so that theseparation efficiency and properties of the separation membrane can be maintained, the service life of the separation membrane can be greatly prolonged, and the use cost of the separation membrane canbe reduced.

The invention relates to a separation membrane as well as a preparation method and application thereof. The preparation method of the separation membrane comprises the following steps: dissolving a degradable natural polymer, which comprises one of chitosan, cellulose and chitin to obtain a membrane casting solution; dispersing a slow-release anti-degradation substance in the membrane casting solution to obtain a modified membrane casting solution, wherein the slow-release anti-degradation substance comprises one of silver nano particles, copper nano particles, thymol oil, ginger oil and cloveessential oil; forming a membrane from the modified membrane casting solution to obtain a liquid membrane; and carrying out phase inversion or phase separation on the liquid membrane to obtain the separation membrane. The raw material sources are wide, the prepared separation membrane has little environmental pollution, the separation performance of the separation membrane can be maintained in the using process, and the separation membrane is naturally decomposed after the service life of the separation membrane is reached.

The invention relates to a lock structure. In order to solve the problem of aerospace vehicle locks, the invention discloses a catch lock, which includes a lock body, a lock tongue and a spring mechanism, and is characterized in that an automatic unlocking mechanism is arranged in the lock body. The automatic unlocking mechanism includes a deceleration mechanism and a cam mechanism, which can automatically unlock and lock. One side of the lock body is also provided with a manual unlocking mechanism for backup. The invention has the advantages of simple and compact structure, stable and reliable operation, and can realize the capture between two aerospace vehicles and keep the connection and separation of the two aircrafts.

The invention relates to a filler tube for a fuel tank, having a tube portion (4) made of plastic material and a tubular adapter (6), which is connected to the tube portion (4), for coupling the filler tube (2) to the fuel tank, wherein a lateral surface (12, 28) of the adapter (6) is integrally bonded, in particular welded, to a lateral surface (14) of the tube portion (4), wherein the adapter (6) and the tube portion (4) overlap in the region of the integrally bonded connection.

The invention belongs to the technical field of chemical analysis and detection, and particularly relates to a nano superparamagnetic molecularly imprinted magnetic bead and a preparation method and application thereof. The preparation method of the molecularly imprinted magnetic bead comprises three steps of preparation of a superparamagnetic nano material, coating modification of surface silicondioxide and preparation of surface molecularly imprinted modification. The molecularly imprinted magnetic bead for identifying sildenafil disclosed by the invention has a high-selectivity adsorptioneffect on sildenafil molecules; the adsorbent can be used for adsorption and enrichment of sildenafil molecules, has the advantages of large specific surface area, good dispersibility, large adsorption capacity, strong magnetic responsiveness and good stability, and is beneficial to improvement of the detection sensitivity of trace sildenafil molecules in food, drugs, health products and other products in combination with chromatography, electrochemistry and other detection technologies.

The invention relates to a preparation method for a colored hollow fiber membrane. The preparation method is characterized in that firstly pigments are selected according to the color design requirement of a product and are added into a membrane forming material system together with a dispersant after being evenly mixed with the dispersant through high-speed agitation; a conventional solution spinning method or a fusion spinning method is adopted to prepare the hollow fiber membrane; the pigments are one or more of titanium white, carbon black, ferric oxide yellow, organic pigment yellow 138, iron red, organic pigment red 122 and / or ultramarine; the average grain size of the pigments is less than 10 microns; the dosage of the pigments is 0.2 to 5 percent of the mass of polymers in the membrane forming material system; the dispersant can be titanate, white paraffin or Tween-80; and the dosage of the dispersant is 0.1 to 3.0 percent of the mass of the pigments.

The invention relates to the technical field of reverse osmosis membranes, and discloses a chlorine-resistant composite reverse osmosis membrane and a preparation method thereof. The preparation method comprises the following steps: (1) treating the surface of a polysulfone ultrafiltration base membrane by using argon plasma, then soaking the treated polysulfone ultrafiltration base membrane with an aqueous chlorosulfonic acid solution, then conducting soaking with a polyamine aqueous solution, and performing drying to obtain a polysulfone ultrafiltration base membrane I; (2) soaking the polysulfone ultrafiltration base membrane I in a polyacyl chloride organic solution to obtain a polysulfone ultrafiltration base membrane II; (3) carrying out heat treatment on the polysulfone ultrafiltration base membrane II to obtain a composite reverse osmosis membrane; (4) soaking the composite reverse osmosis membrane in a reduction solution formed by mixing a phosphoric acid solution and a formaldehyde solution for reduction treatment to obtain an amide N-hydroxymethylated polyamide membrane; and (5) placing the amide N-hydroxymethylated polyamide membrane in a glutaraldehyde solution for cross-linking treatment to obtain the chlorine-resistant composite reverse osmosis membrane. The chlorine resistance of the prepared chlorine-resistant composite reverse osmosis membrane is remarkably enhanced, the service life of the membrane is prolonged, economic cost is reduced, and the application range of the membrane in desalination is expanded.

The invention discloses an underground oil-water separation device and an oil-water separation method. The underground oil-water separation device comprises a central pipe, a turbine generator is arranged in an opening in the upper end of the external central pipe, a pulse generator is fixed to the central pipe, on the lower side of the turbine generator, the power output end of the turbine generator is connected to the power input end of the pulse generator, a multi-cup equal-flow type oil-water separator is formed on the central pipe on the lower side of the pulse generator, the multi-cup equal-flow type oil-water separator comprises a plurality of sedimentation cups, positive electrodes and negative electrodes which directly surround the edges of the sedimentation cups are arranged on the edges of the upper parts and the lower parts of the sedimentation cups correspondingly, all the positive electrodes in the sedimentation cups are connected together through a wire, and all the negative electrodes in the sedimentation cups are connected together through a wire. The device can improve the separation speed of oil and water, accelerate the demulsification degree and oil aggregation, and improve the oil-water separation ratio.

This invention provides an optical fiber ribbon core wire, which can suppress a deterioration in polarized wave mode dispersion and can contribute to an increase in communication capacity in wavelength multiplexed communication, and an optical fiber cable. The optical fiber core wire comprises a plurality of optical fiber core wires (12) which have been bundled, and a ribbon covering layer (13) provided on the circumference of the plurality of optical fiber core wires so that the plurality of optical fiber core wires are integrated with each other. In this optical fiber ribbon core wire, the casing has a glass transition temperature in therange of 80 to 130 C and a Young's modulus in the range of 800 to 2100 MPa. Further, a requirement of 1 < b / a = 2 is always satisfied wherein a represents the thickness of a covering layer coated on the upper side and lower side of the plurality of optical fiber core wires; and b represents the thickness of a covering layer coated on each of outer sides of the optical fiber located on the outermost part in the optical fiber ribbon core wire. The covering layer thickness (a) is not more than 10 [mu]m, and the covering layer thickness (b) is less than 20 [mu]m.

The invention discloses an integrated two-stage high-efficiency cyclone separator. The integrated two-stage high-efficiency cyclone separator comprises a casing (1), a gas inlet (11) formed in the middle of the casing, a gas outlet (12) formed in the upper portion of the casing, a sewage outlet (13) formed in the bottom of the casing, and a dust hopper (10) connected with the sewage outlet; a pre-separator (2), a first-stage cyclone separator (3), a gas rising pipe (4) and a second-stage cyclone separator (7) are arranged in the casing (1), the first-stage cyclone separator is arranged in thepre-separator, and a pre-separation cavity (21) is formed between the pre-separator and the first-stage cyclone separator; and the first-stage cyclone separator penetrates through the sewage outlet and communicates with the dust hopper, the first-stage cyclone separator communicates with the second-stage cyclone separator through the gas rising pipe, and the gas inlet runs through the casing and communicates with the pre-separator. Multi-stage separation is achieved in one separator, and the separator has high separation efficiency and low operation resistance and can operate stably for a longperiod; and impurities collected in each stage of separation are collected together and centralizedly discharged through the same sewage outlet.

The invention discloses a preparation method of a novel MOF-based hydrogel gas separation membrane. The preparation method comprises the following steps: introducing a water-stable metal-organic framework material into a hydrogel polymer precursor solution, and adopting an ultraviolet-initiated free radical polymerization method, to prepare the MOF-based hydrogel gas separation membrane with a good carbon dioxide separation performance in one step. The prepared membrane is of a self-supporting type, water is adopted as a solvent, on one hand, the interface compatibility of MOF in the membrane and a polymer matrix is improved, and the interface non-selection defect is eliminated; and on the other hand, water has an effect of promoting CO2 transmission, and more gas permeation transmission channels are provided for CO2. The membrane prepared by the invention has the advantages of green and environment-friendly raw materials, simple preparation method and mild conditions, is suitable for separation of water-stable MOF and various gas systems in different water environments, is suitable for industrial production, and provides reference for expanding the application of the MOF-based mixed matrix hydrogel membrane in gas separation.

The present invention relates to a cyclone separation device for separating particles from air and a cyclone vacuum cleaner (80). It has the objective to reduce noise without impairing the dirt separation performance. This is achieved an arrangement comprising a cyclone chamber (10), a dirt collecting chamber (50) arranged adjacent to the cyclone chamber (10) for collecting dirt particles separated from air, a dirt-duct (40) between the cyclone chamber (10) and the dirt collecting chamber (50) for allowing dirt particles to pass from the cyclone chamber (10) towards the dirt collecting chamber (50), and an air-guide (60) arranged adjacent to the dirt-duct (40) for reducing the momentum of the air in the dirt-duct (40).

The invention provides a separator and a food processor. The separator comprises an extrusion container and a juice pan, a fastening mechanism used for being assembled with a separator cover assembly is arranged at the top of the extrusion container, a mesh plate provided with mesh holes is arranged at the bottom of the extrusion container, the mesh holes are communicated with an extrusion cavity of the extrusion container, sharpeners are arranged on the inner wall of the extrusion container, a slagging hole is further arranged in the side wall of the extrusion container and is located above the mesh plate, and the bottom of the extrusion container extends outwards from the position of the slagging hole to form a slagging tube; the juice pan is arranged under the mesh plate and extends outwards to form a juice tube. By the arrangement, problems about high manufacturing cost of the separator and inconvenience in cleaning the separator in the prior art can be solved.

The invention provides a closure mechanism of a hollow fiber module and the hollow fiber module, capable of keeping high tightness of the hollow fiber module even though the bactericidal treatment is performed. The closure mechanism of the hollow fiber module comprises: an obstruction component capable of being embedded into a primary liquid-flowing nozzle and closing the primary liquid-flowing nozzle; a closure component mounted on a secondary liquid-flowing nozzle and capable of closing the secondary liquid-flowing nozzle; an inner-side obstruction component capable of being embedded into the secondary liquid-flowing nozzle at the inner side of the closure component and obturating the secondary liquid-flowing nozzle, wherein the closure component freely deforms and the inner-side obstruction component is pressed into the secondary liquid-flowing nozzle when the closure component is mounted on the secondary liquid-flowing nozzle. The inner-side obstruction component comprises an access and the inner space is communicated with the cirumferential space by the access when the inner-side obstruction component is relatively lightly embedded into the secondary liquid-flowing nozzle at the inner side of the closure component. The inner-side space is not communicated with the cirumferential space by the access when the inner side of the inner-side obstruction component is relatively deeply embedded into the secondary liquid-flowing nozzle at the inner side of the closure component.

The invention relates to a multistage combined tubular demister. The demister comprises a tube bundle cylinder, a first-stage demisting element, a second-stage demisting element, a third-stage demisting element and a fourth-stage demisting element, the first-stage demisting element, the second-stage demisting element, the third-stage demisting element and the fourth-stage demisting element are coaxially and sequentially arranged in the tube bundle cylinder from bottom to top, the first-stage demisting element is provided with corrugated plate blades, the second-stage demisting element, the third-stage demisting element and the fourth-stage demisting element are provided with flat plate type guide vanes, each stage of demisting element has the separation capacity of liquid drops with different particle sizes and the corresponding resistance characteristic, and the demisting process is graded. The superposing effect of the separation effect is achieved through the multiple stages of demisting elements, the separation performance is guaranteed with the minimum pressure loss, and ultra-low and ultra-clean emission of flue gas in the desulfurizing tower is achieved.

The invention provides a preparation method for a high-performance polyimide hollow fiber membrane. The hollow fiber membrane is prepared by using a dry-wet spinning technology, and the mechanical strength and the solvent resistance of the polyimide hollow fiber membrane are improved by using a high-temperature annealing method. When the annealing temperature is close to the glass-transition temperature, the annealing process can improve the tensile strength of the polyimide hollow fiber membrane, and when the annealing temperature is higher than the glass-transition temperature, the tensile strength and the solvent resistance of the polyimide hollow fiber membrane can be obviously improved. The method is simple and effective, and has a good application prospect in the aspect of gas separation.

The invention discloses a super-hydrophilic low-molecular-weight intercepted graphene composite ultrafiltration membrane and a manufacturing method of the super-hydrophilic low-molecular-weight intercepted graphene composite ultrafiltration membrane. The composite ultrafiltration membrane comprises graphene oxide, a polysulfone ultrafiltration membrane prepared by blending the graphene oxide, aminated titanium dioxide nanoparticles implanted into the surface of a polysulfone ultrafiltration pore channel, N-methylpyrrolidone, polyvinylpyrrolidone, polyvinylpyrrolidone, polyvinylidene fluoride, hydrazine hydrate and ammonia water. Compared with an ultrafiltration membrane without doped graphene, the ultrafiltration membrane with higher mass fraction of doped graphene has better mechanical property and swelling resistance, high tensile strength, large water flux and high bovine serum albumin rejection rate, the interaction between organic frameworks is enhanced, the mechanical strength of the organic frameworks is greatly enhanced, the mechanical property of the prepared ultrafiltration membrane is obviously improved, the solvent resistance of the membrane is greatly enhanced, and a remarkable technical effect is achieved.

The invention relates to the technical field of environmental protection materials and discloses a preparation method of an anti-shrink polytetrafluoroethylene composite nano-filtration membrane. Themethod includes: preparing a mixed solution, containing modified rod-like SiO2, and an oil phase solution; respectively soaking a hydrophilic polytetrafluoroethylene micro-pore base film in the mixedsolution and the oil phase solution for carrying out an interfacial polymerization reaction, thus forming a polyamide separation layer on the surface of the base film. The nano-filtration membrane hasexcellent anti-shrink performance and can maintain the separation performance by preventing the damage on the polyamide separation layer on the composite nano-filtration membrane due to heat shrinkage. The product can be used in the fields such as wastewater treatment, water softening and sea water desalination.

The present invention addresses the problem of providing a bonded body having high airtightness and also having excellent durability under high temperature / high pressure conditions. The problem can besolved by a bonded body comprising a complex of zeolite and an inorganic porous support and a dense member, wherein the complex and the dense member are bonded together with an inorganic glass or aninorganic adhesive agent, the inorganic glass or the inorganic adhesive agent has a thermal expansion coefficient of 30* 10-7 to 90*10-7 / K inclusive and, when an inorganic glass is used, the inorganicglass has a softening point of 550 DEG C or lower. The present invention also addresses the problem of providing a method for producing an alcohol with high efficiency by placing a separation membrane in an alcohol synthesis reactor by a bonding method having good sealing performance and durability in the presence of an alcohol steam under a high temperature / high pressure condition. The problem can be solved by a method for producing an alcohol, comprising reacting a raw material gas containing at least hydrogen and carbon monoxide and / or carbon dioxide in a reactor in the presence of a catalyst to produce the alcohol, wherein the reactor to be used for the reaction is provided with an alcohol-selective permeable membrane that is bonded to a dense member so that the alcohol produced by the reaction can pass and be removed through the selective permeable membrane.