324 results about "Double membrane" patented technology

A device for epicardial support and / or the assuming of cardiac activity having a double membrane (1) consisting of an elastic inner membrane (2) and a non-expandable outer membrane (3) as well as a closed cavity (4) formed therebetween which can be inflated and deflated by means of a fluid. With the objective of further developing a device of the type as indicated at the outset which provides a simpler possibility of stimulating the heart in the critical post-operative phase, it is provided for at least one probe / electrode unit (7, 8) to be arranged on the inward facing side (6) of the inner membrane (2) to the heart (5) for epicardial ECG leads and / or signal transmission / conversion of an external pacemaker.

A device for epicardial support and / or the assuming of cardiac activity having a double membrane (1) consisting of an elastic inner membrane (2) and a non-expandable outer membrane (3) as well as a closed cavity (4) formed therebetween which can be inflated and deflated by means of a fluid. With the objective of further developing a device of the type as indicated at the outset which provides a simpler possibility of stimulating the heart in the critical post-operative phase, it is provided for at least one probe / electrode unit (7, 8) to be arranged on the inward facing side (6) of the inner membrane (2) to the heart (5) for epicardial ECG leads and / or signal transmission / conversion of an external pacemaker.

The invention discloses a double-layer membranous tissue repair material and a preparation method thereof, wherein, a cell-free membranous biological derivative material is used as a surface layer, and a fibroblast is compounded in the interior of a biological support material to form a substrate, and then the surface layer and the substrate are combined in a chimeric way to form the double-layer membranous tissue repair material; a compact surface layer structure can effectively reduce the loss of water, electrolytes and protein from surface of wound, avoid the invading and the reproduction of bacteria to the impaired surface of wound as well as prevent the infection of the surface of wound, thus being beneficial to epitheliosis and epithelial growth; the substrate can directly repair the surface of wound, promote the ingrowth of cells around the surface of wound and the angiogenesis, induce the differentiation from stem cells to skin cells and quicken wound healing; compared with the existing products, the tissue repair material has the advantages of being capable of promoting the regeneration of skin, improving the elasticity, the flexibility and the mechanical abrasion resistance of skin after the surface of wound is healed, reducing hyperplasia of scar tissues, controlling the contracture, having excellent biocompatibility, increasing the success rate of transplant and improving the quality of healing; the invention has wide material resources and simple production method; the double-layer membranous tissue repair material prepared is applicable to the clinical treatment of skin defect caused by inflammation, ulcer, thermal burns, iatrogenicity and the like.

A transducer protector having at least two filter membranes. In one embodiment, the transducer protector includes a body between two tubular connectors, each of which has a lumen that may be axially aligned. The body lumen is separated from the lumen of each of the tubular connectors by a filter membrane. In one embodiment, the body is transparent and the body lumen has an indicator to alert a user that the filter membrane has been breached by a contaminant so that the user can take immediate steps to prevent further contamination of the system. The configuration of the transducer protector also facilitates the use of separate indicator devices, such as sensor clips.

A transducer protector having at least two filter membranes. In one embodiment, the transducer protector includes a body between two tubular connectors, each of which has a lumen that may be axially aligned. The body lumen is separated from the lumen of each of the tubular connectors by a filter membrane. In one embodiment, the body is transparent and the body lumen has an indicator to alert a user that the filter membrane has been breached by a contaminant so that the user can take immediate steps to prevent further contamination of the system. The configuration of the transducer protector also facilitates the use of separate indicator devices, such as sensor clips.

The invention discloses a method for treating coal gasification wastewater. The method comprises steps of: (1) lime softening by first adding lime milk to the coal gasification wastewater to conduct chemical precipitation on calcium salt and magnesium salt with the lime milk, standing the precipitation and filtering an supernatant; (2) ozone oxidation by sending the wastewater filtered in the step (1) into an ozone oxidation device for treatment; (3) MBBR treatment by sending the wastewater subjected to ozone oxidation into an MBBR for treatment; (4) coarse filtration; (5) continuous membrane filtration or ultrafiltration; (6) reverse osmosis; and (7) multi-effect evaporation by conducting multi-effect evaporation on the concentrate obtained by reverse osmosis treatment, and further crystallizing the concentrate obtained by multi-effect evaporation. The method of the invention can effectively remove the main pollutants such as COD, ammonia nitrogen and chroma in coal gasification wastewater, can also greatly reduce the salt content of the wastewater, ensure the efficient and long-term running of the double membranes, and achieve zero discharge of coal gasification wastewater.

The invention provides a double-membrane treatment method of iron and steel industrial wastewater. The method comprises the following steps that the pH value of the wastewater is regulated to be greater than 7, and then, oxygen gas is introduced into the wastewater until the total iron content in the wastewater is reduced to a value smaller than 0.5mg / l; the pH value of the wastewater is regulated to 8.0 to 8.5, flocculating agents and coagulant aids are added into the wastewater under the stirring condition, and then, the static settlement is carried out; the wastewater subjected to preliminary treatment is subjected to filtering treatment in a filter so that the water outlet turbidity of the wastewater is smaller than 2NTU; the wastewater subjected to filtering treatment is subjected to full flow filtering treatment; the wastewater subjected to pretreatment is subjected to two-stage reverse osmosis treatment; and the wastewater subjected to the two-stage reverse osmosis treatment is subjected to fine treatment through a mixing bed. The double-membrane treatment method has the advantages that the treated wastewater reaches the demineralized water standard, the cyclic utilization rate of water resources is improved, the consumption of new water is saved, and the outward discharge water of a ton of steel is reduced.

The invention relates to a double membrane slow release fertilizer containing humic acid and a preparation method thereof. The double membrane slow release fertilizer consists of a fertilizer core, a first envelope and a second envelope and is prepared by the components in parts by weight as follows: 90-98 parts of fertilizer core, 0.5-5 parts of first envelope, 1-5 parts of second envelope and 0.5-2 parts of bonder. According to the double membrane slow release fertilizer containing humic acid, gelatin and humic acid are taken as a membrane material and can be degraded to amino acids and fulvic acid which can be directly absorbed by crops or converted into soil organic matters without damaging soil structure or polluting soil.

The invention belongs to the field of biotechnology, and particularly relates to a probiotics double-layered microcapsule and a manufacturing method thereof. The probiotics double-layered microcapsule and the manufacturing method are improved according to defects in the prior art. A high-pressure homogeneous emulsification method is adopted; sodium alginate and chitosan serve as capsule wall materials and are cross-linked with calcium chloride to form a double-layer film; bifidobacterium is taken as an experimental subject; an L9(34) orthogonal experiment is designed, and the double-layered microcapsule is manufactured. The double-layered microcapsule is high in encapsulation rate, the problem that excessive water loss is likely to happen to a single-layer capsule and accordingly activated probiotics is dead can be solved, and resistance to outside bad environments of probiotics can be improved. The method is easy to operate. Cost of raw materials is low. The survival rate of probiotics bodies can be obviously increased. Cost performance is high.

A prosthetic sleeve and socket system, the sleeve including dual flaps or skirts concentrically arranged about the sleeve and configured to form a sealed chamber between the sleeve and socket when the sleeve is inserted into the socket. An air permeable material is interposed between one of the skirts and the sleeve to maintain a continuous interconnected air layer therebetween. An expulsion valve is provided to allow air contained within the sealed chamber to be forced out of the chamber ahead of the sleeve when it is inserted into the socket, and a powered vacuum pump maintains the vacuum thereafter, if needed. The system allows for a substantial reduction in size of known sockets and permits, in some instances, the disposal of bulky suspension straps currently in use to force the socket against a residual limb.

The disclosure relates to a membrane pump head for a homogenizer or a high-pressure pump. The membrane pump head comprises at least one pump head enclosed in a pump housing. The membrane pump head also includes a product chamber with inlet and outlet for the product, as well as a hydraulic chamber in which a piston is disposed to operate. The product chamber and the hydraulic chamber are separated by a double membrane. The membrane is oriented at 15-75° in relation to the longitudinal direction of the piston.

The invention relates to a treatment process and device for wastewater containing benzene. The device comprises a pretreatment unit, an ozone oxidation unit, a biochemical treatment unit and a double-membrane advanced treatment unit which are sequentially connected. The treatment process comprises the steps of: firstly adding lime to the wastewater for softening the wastewater, then adding a coagulant for polyferric sulfate coagulation, adding a flocculating agent for flocculation, precipitating and clarifying, and then sending clear liquid into a sand filtering layer, wherein yielding water enters an ozone contact tank for ozone aeration and oxidation, carrying out biochemical treatment on the wastewater subjected to ozone oxidation by adopting a biological aerated filter treatment process and a moving bed biomembrane reactor so as to further degrade COD (Chemical Oxidant Demand), and carrying out ultra-filtration and reverse osmosis double-membrane treatment on the wastewater for desalination. According to the invention, through combination of the treatment units, the removal rate of CODcr with benzene rings in the fed water can be up to above 80%, and the removal rate of SS (Suspended Solids) is about 90%, and the removal rate of ammonia nitrogen is above 85% before fed water enters a RO (Reverse Osmosis) membrane. For a double-membrane system, the cleaning period is increased by 3-4 times, and the service life of the membrane is prolonged by 1-2 years.

A roll-up cover system includes a tarpaulin (30) having a fixed edge (30-1) and a free edge (30-2) secured to a winding shaft (31), in which the tarpaulin is of the double-membrane inflatable type (30a, 30b) and all or part of the unwinding of the tarpaulin is carried out by inflating the tarpaulin, the inflating pressure occurring in the tarpaulin unwinding the tarpaulin or contributing to the unwinding force. The roll-up cover system has particular application to horticultural greenhouses.

The invention relates to a preparation method of a phospholipid biomimic membrane containing aquaporins. A composite membrane the surface of which is electronegative is prepared by layer-by-layer assembly, and a phospholipid vesicle solution with electropositivity, which is wrapped with aquaporins, spreads on a composite membrane by an electrostatic bonding effect so as to form a phospholipid dual-layer membrane. According to the invention, the phospholipid biomimic membrane containing aquaporins is prepared by layer-by-layer assembly, after aquaporins is added, the flux of the membrane is improved by 4-5 times compared with the original membrane, and is about 16-28L / m2h (the water flux of the original membrane is 3-5L / m2h); the reject rate of monovalence Na<+1> is improved by more than 40%; the reject rate of bivalence Mg<+2> is improved by more than 65%; and the preparation method of the phospholipid biomimic membrane containing aquaporins can be applied to different fields of water softening, wastewater treatment and the like, and has a wide application prospect.

The invention discloses a double-membrane double-control slow release fertilizer. The slow release fertilizer is prepared by wrapping urea by using sulphur and further wrapping by using a layer of soluble resin, and mixing the urea of a double-membrane material with a stable composite fertilizer, wherein the fertilizer nutrient release period can be 130 days, the release rate of 25 days can be 30%, and the release rate of 120 days can be more than 85%; the urea wrapped by double membranes is used for controlling the release of a urea state nitrogenous fertilizer, the release of the nitrogenous fertilizer is controlled and the utilization rate of a phosphatic fertilizer is increased through the stable fertilizer; the slow release fertilizer is longer and slower in action; for ordinary crops, the effect that the fertilizer is applied once without further fertilization is achieved; the utilization rate of the nitrogenous fertilizer is increased by 15%; and the utilization rate of the phosphatic fertilizer is increased by 12%. The urea inhibition ratio is 30%, the nitrogenous fertilizer nitration inhibition ratio is 25%; the wrapping membrane material can be degraded within 150 days; and meanwhile sulfur element is supplemented for the soil.

The invention provides a system and a process for desalting recycle-water of iron and steel combined sewage by a bi-membrane method, which belong to the technical field of treatment and recycling of sewage. The system comprises a cooling tower, a raw water tank, a micro-flocculation filter device, a flow by-pass activated carbon filter kettle, a laminated filter, an ultrafiltration system, an ultrafilter, a reverse osmosis system, and a reverse osmosis desalination water tank. The system and the process are used for solving the problem of desalination of the recycle-water of sewage by the bi-membrane method for steel enterprises. In the system and the process, the pretreated water is treated through the ultrafiltration device by bi-membrane desalination to meet the requirement that SDI is less than or equal to 3, and the water is subjected to desalinating treatment through the reverse osmosis device. The system and the process treat the recycle-water of the iron and steel combined sewage by a mode combining preoxidation, micro-flocculation filtration, flow by-pass activated carbon filtration and self-cleaning filtration, thereby greatly improving the operating stability and the service life of the bi-membrane desalination system, effectively realizing sewage reclamation and 'zero drainage' of the sewage, and having important practical value on the desalination of the recycle-water of the iron and steel combined sewage.

The invention relates to a treatment method realizing polymer-bearing produced wastewater resource utilization, which is based on flotation-filtration, double filtering, fine filtration and double-membrane filtration. The invention is characterized in that flotation-filtration includes two stages; an organic polymer reverse demulsifier is added at the first-stage flotation inlet as a deoiling agent; one or more of an inorganic salt coagulant, an inorganic polymer salt coagulant and an organic polymer coagulant is added at the second-stage flotation inlet as a coagulant; NaOH solution with volume concentration of 5-10% is added at the inlets of a back flushing pump of a double filter and a fine filter; and one or more of chlorine dioxide, quaternary ammonium salt, glutaraldehyde or halogenated phenol is added at the inlet of the double filter as a bactericide. The wastewater treated by the method has total mineralization being not more than 250mg / L and conductivity being less than 600ms / cm. The method is used for preparing polymer mother liquid and can improve the oilfield polymer injection development effect, save water resources and finally realize polymer-bearing produced wastewater resource utilization.

The invention belongs to the field of tissue engineering and biomaterials and discloses a preparation method and use of a graft material in a double membrane structure. The graft material comprises stem cell membrane patch segments and platelet-rich fibrin membrane particles, wherein the stem cells are firstly expanded-cultured, and then induction-cultured by using a membrane induction fluid to obtain a stem cell membrane patch, and the stem cell membrane patch is sheared to prepare the cell membrane patch segment; a platelet-rich fibrin gel is extruded, then liquid content of the extruded platelet-rich fibrin gel is removed to obtain the platelet-rich fibrin membrane, and the platelet-rich fibrin membrane is sheared to form particles; and the cell membrane patch segments and the platelet-rich fibrin membrane particles are mixed according to an optimal proportioning relation of in-vitro screening to prepare the needed graft material. The graft material can be widely applied to tissue repair and regeneration of small-area lesion in oral activity and other parts of the body, and the tissue repair effect is improved.

To provide a method of forming a planar lipid-bilayer membrane for membrane protein analysis, by which downsizing, simplifying, and multichanneling of a device therefor are achieved. A planar lipid-bilayer membrane 24 is formed by filling a microchannel 12 with a buffer solution 18, the microchannel 12 disposed under a horizontal partition wall 13 having an aperture 14; applying a small amount of a lipid solution 20 as a droplet on the aperture 14 filled with the buffer solution 18 to thereby form a thin layer 21 of the lipid solution in a chamber, the chamber 17 being formed at a position corresponding to the aperture 14 and provided with a liquid trap 15 inside the chamber; and applying a buffer solution 23 as a droplet to the chamber 17 from the upper side of the chamber.

The double-membrane pump-suction washing method disclosed by the present invention and the washing machine form a closed washing chamber between the washing chamber (15) of the washing machine and the upper glued film (16) and the lower glued film (11). The formed positive and negative pressures drive the expansion and contraction of the upper and lower film, thereby simulating human hands squeezing and kneading the clothes to complete the washing work. The invention utilizes the negative pressure of the pump to squeeze and knead the clothes to achieve the purpose of simulating the washing method of human hand rubbing. It not only has high cleaning degree and complete functions, but also saves water and time, low cost and simple structure.

The present invention discloses an immersion type double membrane bioreactor and a salt-containing sewage treatment method. The immersion type double membrane bioreactor mainly comprises a biological reaction tank, a microfiltration or ultrafiltration membrane assembly, a positive osmosis membrane assembly, a positive osmosis absorption liquid unit and an absorption liquid reverse osmosis concentration system. The immersion type double membrane bioreactor and the salt-containing sewage treatment method are applicable for deep purification and reuse treatments of various municipal and industrial wastewater, wherein water quality of the treated effluent is similar to water quality of reverse osmosis effluent.

The invention discloses a method of treating high-concentration metaformaldehyde waste water into reuse water, relating to a treatment technology of high-concentration metaformaldehyde waste water. The pH of metaformaldehyde waste water of which the formaldehyde content is 4000mg / L into 3.0-4.0, then metaformaldehyde waste water is sent into an anaerobic hydrolysis composite reactor combining activated sludge with biomembrane and an aerobic composite reactor; at last, a double-membrane method is adopted to treat to ensure that effluent reaches the standard of urban wastewater recycling industrial water quality, thus serving as recirculated cooling water. The invention strengthens removal of high-concentration formaldehyde, COD, trioxymethylene, divinylene oxide and other pollutants in high-concentration metaformaldehyde waste water by biological treatment, can effectively resist impact from violent water yield and water quality, and has the advantages of high system starting speed, small foam of the aerobic composite reactor, low operation cost, stable and effective treatment and zero discharge of waste water.

The present invention provides a process for producing virus-like particles, which can produce virus-like particles having the protein of a virus and a lipid bilayer membrane derived from an eukaryotic microorganism as an outer membrane in a short period of time in a form that is not contaminated with a vector virus, and which enables the virus-like particles to be used for various applications. The process of the present invention comprises: (a) incorporating a gene encoding a protein essential for viral particle budding or a fragment thereof into a vector which can be expressed in a eukaryotic microorganism; (b) transfecting the vector into the eukaryotic microorganism; (c) culturing a transformed eukaryotic microorganism; (d) removing a cell wall of the eukaryotic microorganism; and (e) further culturing, followed by collection of a culture supernatant.

The invention relates to an amphipathic block polymer, a polymersome consisting of the amphipathic block polymer, and a preparation method and application of the polymersome. More specifically, the amphipathic block polymer is obtained from a hydrophilic chain segment and a hydrophobic chain segment by a reversible addition-fragmentation chain transfer (RAFT) polymerization method, wherein the hydrophilic chain segment is polyethylene glycol with the terminal group modified by tri-thioester and the molecular weight of the hydrophilic chain segment is 1,000 to 20,000 Da; the constitution of the hydrophobic chain segment is as shown in the following formula, m is equal to 1 to 11 and n is equal to 1 to 11. By adoption of the amphipathic block polymer, controllable and synchronous release of polymersome-loaded hydrophilic and hydrophobic molecules is realized, and the biological catalytic activity of a polymersome-loaded enzyme reactor is regulated and controlled through stimulation. In addition, in the processing of triggering crosslinking by stimulation, the permeability of a sieve-shaped hydrophilic channel generated in a double-layer membrane of the polymersome and the membrane can be controlled by the duration time of stimulation.

The invention provides a method for separating and extracting tetrahydropyrimidine from fermentation broth. The method solves the problem that the existing production technology has a complex technical route, high separating purification difficulty and high energy and water consumption. The method for separating and extracting tetrahydropyrimidine from tetrahydropyrimidine-rich fermentation broth comprises filtering to remove bacteria, most of proteins and a part of a pigment through a double-membrane separation system comprising a microfiltration membrane and an ultrafilter membrane, adsorbing tetrahydropyrimidine through a cation exchange resin, carrying out elution on tetrahydropyrimidine through ammoniacal liquor and carrying out active carbon decoloration, concentration alcohol precipitation, recrystallization and finished product drying to obtain tetrahydropyrimidine crystals.

The invention discloses a multi-channel multi-component stationary source sampling and analysis system. A sampling gun is connected to a particulate cutting head; the particulate cutting head is connected with an MPS (Modified Polystyrene) dilution system; the MPS dilution system is connected with an air compressor; a pneumatic connector of the MPS dilution system is connected to gas inlets of two gas distributing pipes; a gas emptying port with a one-way valve is formed in the tail end of each gas distributing pipe; equivalent sampling ports are formed in a main body of each gas distributing pipe; the equivalent sampling ports are connected with a gas concentration sensor, a VOCs ((Volatile Organic Compounds) sampling stand, an on-line particulate detector and particulate double membrane sampling devices; flue gas is guided into a cutter behind the particulate cutting head by the flue gas sampling gun; particle components other than target particulates are removed and then enter the MPS dilution system through an MPS warm air guide hose; the diluted gas enters the gas distributing pipes and then is subjected to sampling or on-line analysis through the equivalent sampling ports; each sampling or analysis instrument is provided with a power system; and the redundant diluted gas is discharged to an atmosphere by the gas emptying ports.

The invention provides a double-membrane soil pressure sensor based on hydraulic transmission. The sensor employs a double layer membrane structure. A primary membrane is bonded with an outer ring of a housing by an annular membrane at an edge; and a secondary membrane is welded on an inner ring of the housing. An oil nozzle is used to enable a pressure transmission oil chamber formed between the primary membrane and the secondary membrane to be filled with hydraulic oil. A strain probe that is arranged below the secondary membrane and has a sensing element is connected with an external transmission line by a lead-out hole that is reserved and is arranged inside the housing; an epoxy resin is used for sealing the lead-out hole; and the housing and a bottom cap are threadedly connected. Therefore, a double-membrane soil pressure sensor based on hydraulic transmission is formed. According to the invention, influences caused by uneven distribution of soil pressures and difference of soil texture kinds can be eliminated; adaptability is strong; and calibration can be carried out simply.

The invention relates to an industrial wastewater salt separation technology and industrialized application thereof, belonging to the field of water management. In allusion to coal chemical industry wastewater and coal mine drainage water, reduced high concentration saline water is further concentrated and is subjected to evaporative crystallization for salt separation treatment through double membrane process reduction treatment in the step one and a 'zero release' system in the step two, thereby realizing the goals of the zero release of wastewater and resource utilization of crystal salt and carnallite reduction. Anhydrous sodium sulfate produced according to the technical scheme conforms to the standards of first-grade products in GB / T 6009-2014 Industrial Anhydrous Sodium Sulfate Type I, and sodium sulfate reaches the standards of first-grade refined industrial salt and drying salt in GB / T 5462-2015 Industrial Salt. The technical scheme is simple and practicable, and the operation is convenient, so that the technical scheme is suitable for large-scale popularization and application.

The invention discloses a double-membrane wastewater biological treatment system. The double-membrane wastewater biological treatment system comprises a pool (case) body, a pretreatment zone, a biomembrane reaction zone and a membrane separation reaction zone; and all the above zones are separated through a wall or a separator to form respectively independent work systems, relevant zones are communicated through water flowing ports, a high pressure fan, a membrane water outlet pump and an ultraviolet ray disinfection instrument are arranged outside the pool (case) body, and water discharged from a membrane assembly is pumped into the ultraviolet ray disinfection instrument through the membrane water outlet pump, is disinfected and is discharged outside. The wastewater biological treatment system has the advantages of simple technological structure, good treatment effect, stable running and wide application range, is suitable for the low-concentration organic sewage treatment in hospitals, health centers, rural, the country and towns, and is also suitable for the high-concentration organic wastewater treatment in the industries of bave wastewater, slaughtering wastewater, food processing and the like, so treated water reaches recycled water reuse standards, accords with Chinese energy saving, emission reduction and circular economy policies, and the system can well play an important role in the public campaigns of Wild China, Urban and Rural Cleaning at present, and has large social and economic benefits.

The invention relates to electrolytic and catalytic oxidation reaction device and treating method based on a fluidized bed. The processing method fully utilizes higher electrical conductivity of waste water with salt, and organically integrates electrolytic oxidation, catalytic oxidation and the fluidized bed into a whole. Various organic pollutants in wastewater are deeply oxidized under the catalysis of free radicals and catalyst particles which are produced by the electrolysis of a electrode under the three-dimensional catalysis of an anode, a cathode, catalyst particles and the like, and thus, the organics which are difficult to biodegrade can be removed from wastewater to a deep extent. The reaction device and the method can be used for treating wastewater with low salt concentration, such as wastewater from circulating water plants and power stations of oil refining enterprises, chemical enterprises, and the like and tail water of wastewater reverse osmosis desalting systems, and the wastewater treated by the device and the system meets the requirement of direct discharge, or can be used as high quality source water for double-membrane law deep desalination recycling. In addition, compared with the traditional three-phase fluidized bed, the device and method is easier to operate and control in soli-liquid-gas three seperation.