37 results about "Double membrane" patented technology

The invention relates to the field of direct drinking water of a fusion calculation model, and discloses a double-membrane mixing direct drinking water system and an operation method.The method comprises the steps that online data of a water supply end and a water quality monitoring end are collected for cleaning and time alignment, and a basic working condition data set is formed; the method comprises the following steps: establishing an operation characteristic model comprising water demand prediction, raw water quality prediction and membrane flux characteristic sub-models, calculating double-membrane target water yield and water quality indexes based on the model to generate a control parameter set, evaluating membrane pollution to generate an online cleaning task queue, performing joint simulation to generate a pressure stability control instruction set, and dynamically correcting the model. The conversion from passive response to active pre-judgment of the double-membrane mixing direct drinking water system is realized, and the operation stability, the water quality guarantee capability and the water-saving and energy-saving effects are improved.

The invention discloses a fluorine-containing wastewater advanced treatment system and a fluorine-containing wastewater advanced treatment method based on cooperation of chemical precipitation and a membrane method. Comprising a sedimentation tank, a dynamic filter and a double-membrane system which are arranged in sequence, wherein in the sedimentation tank, a modified calcium salt precipitator and CaF2 seed crystals are added into the fluorine-containing wastewater for reflux, and large calcium fluoride particle precipitates are formed through an induced crystallization adsorption-sedimentation mechanism; the dynamic filter is used for intercepting sediments from effluent of the sedimentation tank through a gradient aperture structure to realize solid-liquid separation and preliminary fluorine removal; and the double-membrane system is used for removing residual fluorine-containing particles, colloids and ions in the wastewater treated by the dynamic filter by utilizing an ultrafiltration membrane and a reverse osmosis membrane. Through cooperation of a modified calcium salt adsorption-precipitation mechanism and a membrane gradient interception method, efficient trapping and solid-liquid separation of fluorine ions are achieved, the fluorine removal precipitation reaction is enhanced, the medicine consumption is reduced, and near-zero external water consumption is achieved.

The application discloses a preparation method of a PPSU-based ZIF-8 double-layer membrane and application of the double-layer membrane in hydrogen separation, and belongs to the technical field of gas separation membranes. The preparation method is as follows: ZIF-8 seeds are embedded in a PPSU matrix solution, then are spin-coated onto the surface of an alpha-Al2O3 carrier to obtain a PPSU-based membrane, and secondary growth of the membrane is carried out through a solvothermal reaction, so that the seeds grow epitaxially, a continuous, dense and defect-free ZIF-8 separation layer is formed on the surface and the near-surface region of the carrier substrate, and the reaction is ended to obtain the double-layer membrane. Through the seed embedding strategy, the interface bonding force between the ZIF-8 layer and the PPSU substrate is significantly enhanced, and the generation of interface defects is effectively inhibited. The double-layer membrane has high permeation flux and high separation selectivity for a H2 / CO2 system, and is particularly suitable for hydrogen separation and purification processes.

The application relates to the technical field of biomedical materials, and discloses a micro-nano fiber composite biomembrane based on electrospinning technology and a preparation method thereof, which comprises the following steps: preparing polycaprolactone, chloroform and dimethyl sulfoxide; mixing the chloroform and the dimethyl sulfoxide to prepare a solvent; dissolving a polymer solution of the polycaprolactone in the solvent and uniformly stirring; continuously collecting fibers by a roller at an ambient temperature of 10 DEG C-25 DEG C and a continuous humidity of 20%RH-70%RH, and performing electrospinning; continuously and gradually changing the fiber membrane structure from order to disorder and from smoothness to porosity in one step by regulating the ambient humidity and the roller rotating speed; and completing the electrospinning to prepare the micro-nano fiber composite biomembrane based on the electrospinning technology. The ambient humidity and the roller rotating speed are regulated to continuously and gradually change the fiber membrane structure from order to disorder and from smoothness to porosity in one step, the interface weak area of a traditional double-layer membrane is avoided, and the mechanical barrier and the biological activity are combined.

The present application provides a liposome having a double-layer membrane structure and use thereof. The liposome comprises a double-layer lipid membrane formed from (a) a phospholipid, (b) dipotassium glycyrrhizinate or a cationic surfactant, and (c) a polyoxyethylene sterol ether having a hydrophobic end embedded in the double-layer lipid membrane. The liposome of the present application has excellent stability and can be stably present in a formulation form. Furthermore, a liposome having a double-layer lipid membrane structure with excellent stability can be obtained without using a polyol.

The invention discloses a double-layer GBR membrane for promoting soft and hard tissue repair and a preparation method and application thereof, and is applied to the field of medical materials. The double-layer GBR membrane mainly comprises an acellular dermal matrix obtained by decellularizing fetal calfskin and a piezoelectric layer prepared by electrostatic spinning of poly-L-lactic acid and chitosan, and the acellular dermal matrix and the piezoelectric layer are further combined through a polydopamine coating prepared on the surface of the piezoelectric layer. During application, the acellular dermal matrix side faces the soft tissue side, and the piezoelectric layer faces the bone tissue side, so that the acellular dermal matrix skin side which is compact in structure is in contact with the soft tissue to play a barrier role, and the relatively loose piezoelectric layer is in contact with bone defects to play a role in guiding osteoblasts to adhere; functionally, soft tissue repair is promoted through the angiogenesis promoting effect of the acellular dermal matrix and the similarity of the tissue of the acellular dermal matrix, and bone regeneration of a bone defect area is promoted through the piezoelectric osteogenesis and angiogenesis effects of the piezoelectric layer.

The utility model relates to the technical field of greenhouse heat preservation, and particularly discloses a greenhouse heat preservation structure which comprises an inner framework, the inner framework is composed of a plurality of n-shaped rods arranged in parallel, the n-shaped rods of the inner framework are fixedly connected into a whole through the same reinforcing rod, the outer surface of the inner framework is fixedly connected with an inner film, and the inner film is fixedly connected with the outer surface of the inner framework. The upper end of the inner framework is fixedly connected with a top framework, the top framework is of a plurality of arch structures arranged in parallel, the outer surface of the top framework is fixedly connected with a top film, and the inner framework, the top framework, the inner film and the top film form a greenhouse unit. According to the greenhouse heat preservation structure, the inner film and the outer film are arranged to form a double-layer film structure, a double-layer structure is formed, the inner film and the outer film can effectively block heat loss, heat exchange between the interior and the exterior of the greenhouse is reduced, and compared with a traditional greenhouse covered with a single-layer film, the greenhouse heat preservation structure can better maintain the temperature in the greenhouse.

The invention relates to the technical field of medicines, in particular to an extraction method and application of cordate houttuynia exosome-like nanoparticles. The method comprises the steps of pretreatment, impurity removal through differential centrifugation, fine filtration, ultra-speed centrifugation crude extraction, sucrose density gradient centrifugation purification, washing and the like. By optimizing key process parameters, the HELNs with the average particle size of 50-150nm and the typical double-layer membrane cup-shaped vesicle form can be stably obtained. Experiments prove that the HELNs prepared by the method have independent and direct anti-staphylococcus aureus activity. Based on the newly discovered biological activity, the invention provides new application of the HELNs in preparation of products (such as antibacterial drugs, dressings, coatings, lotions and the like) for inhibiting staphylococcus aureus and / or treating infection of staphylococcus aureus. The method is standard in operation and good in repeatability, and widens the application field of active ingredients of houttuynia cordata.

The application relates to the technical field of intelligent water treatment control, and discloses a system for simulating and predicting the kinetics of the adsorption capacity of biochar, which comprises the following modules: a data acquisition module uses the Arrhenius equation to introduce a temperature correction coefficient to perform thermodynamic compensation on adsorption kinetic constants; a flow state recognition module determines a forward adsorption or reverse desorption working condition based on the Langmuir model; a resistance decoupling module calculates the mass transfer Biot number based on the double membrane theory to distinguish the liquid film and the internal diffusion resistance of the particles, and uses a physical blockage index to distinguish physical blockage and chemical saturation; a hysteresis compensation module introduces a hysteresis correction factor to correct the desorption equilibrium concentration and calculate the recovery adsorption capacity during the reverse desorption; and a service life prediction module uses a dynamic utilization rate coefficient to correct the theoretical residual capacity and generate operation and maintenance instructions. Through the resistance decoupling and hysteresis compensation mechanisms, the physical and chemical attenuation mechanisms are effectively distinguished, and the precise prediction of the adsorption breakthrough time under dynamic working conditions is realized.

1. Name of the designed product: water purifier (double membrane). 2. Use of the designed product: water purifier for purifying water. 3. Design points of the designed product: in shape. 4. Picture or photo that best indicates the design points: perspective view 1.

The present disclosure relates to a method and system for sewage reuse, the method comprising the following steps: making the sewage to be treated sequentially enter a first catalytic oxidation unit, a first denitrification filter tank unit, a first carrier enhanced BAF unit, a manganese sand unit and a double membrane unit for treatment to obtain concentrated water and fresh water; making the concentrated water sequentially enter a high-density unit, a second catalytic oxidation unit, a second denitrification filter tank unit, a second carrier enhanced BAF unit and a sand filter unit for treatment; the second carrier enhanced BAF unit comprises a second carbon-based carrier, a second engineering bacteria and a second nutrient salt; the second nutrient salt comprises phenol. The method provided by the present disclosure can perform deep treatment on sewage for reuse, so as to improve the utilization rate of sewage.

The utility model relates to the technical field of water purification, in particular to a double-membrane water treatment system. According to the double-membrane water treatment system, a water inlet of an ultrafiltration assembly is communicated with a water outlet end of a raw water pipe, a water outlet of the ultrafiltration assembly is communicated with a water inlet end of an ultrafiltration water pipe, and a water outlet end of the ultrafiltration water pipe is communicated with a water inlet of an ultrafiltration water tank; the compressed air pipe is communicated with the water outlet end of the ultrafiltration assembly; the water inlet end of the backwashing pipe is communicated with the water outlet of the ultrafiltration water tank, the water outlet end of the backwashing pipe is communicated with the water outlet end of the ultrafiltration assembly, and a backwashing pump is arranged on the backwashing pipe; the backwashing drain pipe is communicated with a water inlet of the ultrafiltration assembly; the control device comprises a control valve and a controller, the control valve is in signal connection with the controller, and the controller is in signal connection with the backwashing pump.

The invention belongs to the technical field of sewage treatment, and particularly relates to an electrochemical-double-membrane treatment system and method for oily wastewater of a transformer substation. The electrochemical-double-membrane treatment system is composed of an electrochemical pretreatment unit and a double-membrane deep treatment unit which are connected in sequence. The electrochemical pretreatment unit consists of an electric flocculation module and an electrooxidation module which are connected in sequence; the double-membrane advanced treatment unit consists of an ultrafiltration module and a nanofiltration module which are connected in sequence. By optimizing parameters such as an electrode material, current density and medicament addition and combining with an iron ion valence regulation mechanism, efficient demulsification, oil-water separation and pollutant degradation are realized; the double-membrane unit further ensures the effluent quality, so that the petroleum pollutants and CODlt in the final effluent are not detected; 10 mg / L, and lt of ammonia nitrogen; the concentration is 3 mg / L, and the high-standard recycling and discharging requirements are met.

The application discloses a method for preparing pure water by a double membrane method, which comprises the following steps: Yangtze River raw water is introduced into a resin adsorption tower by a water inlet pump; the raw water has a conductivity of 234-395 muS / cm and a calcium ion of 11.9-14.2 mg / L; a carboxyl-modified phenolic resin is placed in the resin adsorption tower, and the carboxyl-modified phenolic resin accounts for 75-85% of the total volume of the resin adsorption tower; the residence time of the raw water in the resin adsorption tower is 27-41 min; the raw water treated above is introduced into a hollow fiber ultrafiltration membrane system, the pressure of the membrane is 0.1-0.3 MPa, the pure water flux is 2.1-3.4 t / h, and the working temperature of the membrane is 23-28 DEG C; the raw water treated by the ultrafiltration membrane is introduced into a two-stage reverse osmosis system, the water quality reaches the standard, and the prepared pure water is discharged into equipment requiring pure water by a water discharge pump. The pure water treatment method has the advantages of low production and operation cost, fully embodies the energy-saving and emission-reducing effect, and is an environment-friendly green production process.

The invention provides a bacterial outer membrane vesicle capable of efficiently targeting tumors and a preparation method of the bacterial outer membrane vesicle, and relates to the technical field of biological medicines. The target protein PDL1 binding peptide is successfully modified on the surface of the bacterial outer membrane vesicles to prepare the bacterial outer membrane vesicles PDL1-OMVs, the particle size range of the bacterial outer membrane vesicles PDL1-OMVs is 20-250 nm, and the bacterial outer membrane vesicles PDL1-OMVs have an obvious saucer-like double-layer membrane structure and accord with the structural characteristics of the bacterial outer membrane vesicles. According to the PDL1-OMVs provided by the invention, on one hand, the defect that the PD-L1 binding peptide is weak in targeting efficacy is improved, the targeting capability of the PD-L1 binding peptide is remarkably improved, on the other hand, targeting function transformation is realized on the bacterial outer membrane vesicles, and the PDL1-OMVs can realize a specific targeting effect on tumor cells, so that conditions are provided for the PDL1-OMVs serving as a carrier for targeted delivery of tumor drugs.

The invention discloses a double-framework, double-film and double-quilt heat preservation and heat storage sunlight greenhouse, and relates to the technical field of greenhouses, the double-framework, double-film and double-quilt heat preservation and heat storage sunlight greenhouse comprises a front supporting framework and a rear supporting framework which are connected with each other, supporting stand columns are arranged on the side, located in a planting area, of the rear supporting framework, and the supporting stand columns are arranged in the length direction of the rear supporting framework at intervals; one end of each supporting stand column is connected with the rear supporting framework, the other end of each supporting stand column is connected with the ground, a waterproof heat preservation quilt is arranged between every two adjacent supporting stand columns, and a temperature buffering space is formed among the supporting stand columns, the waterproof heat preservation quilts and the rear supporting framework. And a temperature buffer space is formed, so that the structural strength and stability of the rear side of the greenhouse are remarkably enhanced, wind pressure, snow pressure and soil pressure can be effectively resisted, indoor heat is prevented from being transmitted to the rear supporting framework, heat loss from the rear wall to the outside is reduced, and the night heat preservation capacity of the greenhouse is remarkably improved.

This invention discloses a biomimetic nanofluidic sensing membrane, its preparation method, and its applications. The biomimetic nanofluidic sensing membrane comprises a top supporting lipid bilayer membrane and a bottom anodic aluminum oxide membrane with a macroporous structure. A portion of the supporting lipid bilayer membrane corresponds to and communicates with some macropores in the anodic aluminum oxide membrane. An ion carrier is embedded in the supporting lipid bilayer membrane, and its surface is modified with cholesterol-modified aptamers and polyethylene glycol. This invention utilizes the lateral fluidity of the supporting lipid bilayer to achieve multivalent and efficient capture of aptamers. The natural antifouling properties of phospholipids and the steric hindrance of polyethylene glycol synergistically suppress non-specific adsorption, and the detection signal is amplified by the ion current rectification effect induced by the asymmetric structure. The detection limit for TNF-α is as low as 0.219 pM, and with machine learning, it can accurately distinguish six proteins. The preparation method is simple, and the detection sensitivity and specificity are high, showing broad application prospects in early disease diagnosis and high-throughput protein analysis.

The application provides a kind of high-efficiency tumor-targeting bacterial outer membrane vesicle and its preparation method, it is related to biological medicine technical field.The target protein PDL1 binding peptide is successfully modified on the surface of bacterial outer membrane vesicle to prepare bacterial outer membrane vesicle PDL1-OMVs, its particle size range is between 20-250nm, with obvious tea tray like double membrane structure, meet the structural characteristics of bacterial outer membrane vesicle.The PDL1-OMVs provided by the application improves the weak targeting efficiency of PD-L1 binding peptide on the one hand, significantly improves the targeting ability of PD-L1 binding peptide, on the other hand, realizes the targeted functional modification of bacterial outer membrane vesicle, and PDL1-OMVs can realize specific targeting effect on tumor cells, which provides conditions for it as a targeted delivery tumor drug carrier.

The utility model provides an intestinal anastomosis metal stent system with a suction function, which comprises a metal stent, an inner membrane, an outer membrane, a drainage tube and a stent release device, the metal stent is dumbbell-shaped, two sides of the metal stent are raised, and the middle of the metal stent is a groove section; the inner film is a double-layer film and comprises a first film and a second film which are attached to the inner side and the outer side of the metal stent, and the first film and the second film are attached to wrap the metal stent into a whole; the outer film wraps the metal support and wraps the outer side of the second film. The two ends of the outer film are fixedly attached to the outer side of the second film at the protruding positions of the two sides, a space is formed between the outer film and the second film, and a plurality of through holes are formed in the outer film. The drainage tube is communicated with the space; the metal support is in the support releasing device before being released. After the metal support is released, liquid secreted by an intestinal canal stoma, intestinal mucosa, blood vessels and stoma tissue can be blocked or supported, the liquid can enter a gap between the outer membrane and the inner membrane through the through holes in the outer membrane and is sucked out by negative pressure, the stoma and the stoma are kept clean, and healing of the stoma and the stoma is promoted.

The utility model discloses a biogas slurry fertilizer making device based on double-membrane coupling. The device comprises a preheating unit, a feeding side membrane contactor, an absorption side membrane contactor, a gas circulation pipeline, a negative pressure gas pump and a rear end crystallization fertilizer making system. Hydrophobic microporous membrane components are respectively arranged in the feeding side membrane contactor and the absorption side membrane contactor; the gas circulation pipeline is communicated with the gas cavities on the two sides to form a closed loop, and gas circulation is driven by the negative pressure gas pump. And the rear-end crystallization fertilizer preparation system is communicated with the acid liquid cavity of the absorption side membrane contactor and is used for preparing the extracted nutrients into a solid fertilizer. According to the utility model, the closed circulating air flow is used as an intermediate medium, so that the direct contact between the biogas slurry and the acid absorbent is thoroughly avoided, the efficient separation of high-concentration ammonia nitrogen in the biogas slurry and the conversion of high-added-value fertilizer are realized on the premise of not additionally adding chemicals to adjust the pH value, and the system has excellent thermodynamic energy efficiency and energy self-sufficiency characteristic.

The invention belongs to the technical field of pharmaceutical equipment, and relates to a parallel double-membrane-package multi-product shared ultrafiltration method and system, and the system comprises a flow path switching module, a feed liquid conveying monitoring module, a fluid parameter adjusting module, an ultrafiltration separation monitoring module and a waste liquid treatment module. The flow path switching module starts a corresponding control switch according to a produced product and switches the multi-channel valve to a target film package flow path; the feed liquid conveying monitoring module drives a liquid inlet pump to convey feed liquid to be treated and monitors pipeline pressure in the conveying stage in real time. The fluid parameter adjusting module detects flow and conductivity data of to-be-treated feed liquid and adjusts a proportional adjusting valve to stabilize operation parameters; the ultrafiltration separation monitoring module realizes ultrafiltration separation of the feed liquid to be treated through a target membrane package and monitors data in real time; the waste liquid treatment module turns off related equipment switches after ultrafiltration is completed, and guides waste liquid to a waste liquid opening to be discharged. According to the invention, the ultrafiltration processes of multiple biological products can be quickly switched without dismounting in a single system, the risk of manual operation is greatly reduced, and the overall production efficiency is improved.

This invention provides a method and apparatus for extracting heme iron based on a dual-membrane cascade and oxygen isolation protection, belonging to the field of biochemical separation and purification technology. The method first constructs a pneumatically suspended hemolytic environment, utilizing a metal sintered microporous distributor to generate a micron-sized inert bubble fluidized bed, achieving red blood cell disruption and deep deoxygenation under zero mechanical shear conditions, solving the molecular damage and oxidation problems caused by traditional processes. Then, a gas-liquid co-flow ultrafiltration mechanism is employed, introducing pulsed plug flow drive to physically peel off the protein gel layer on the membrane surface online, achieving dynamic anti-clogging and long-term stability in the macromolecular separation process. Finally, transmembrane partial pressure extraction is performed based on a reverse gas-scan nanofiltration model, distinguishing the migration paths of water molecules and dissolved oxygen, outputting a highly active concentrate and a closed-loop circulating gas flow. This invention effectively improves the extraction efficiency of the product Fe. 2+ Retention rate, purity, and continuity of industrial production.

The utility model discloses a kind of civil engineering anti-infiltration structures, including basement foundation, the boss is set in the middle of basement foundation upper surface;Waterproof wall, the waterproof wall is set to basement foundation upper surface four sides, flow guide mechanism is fixedly installed in the inner wall of waterproof wall by anchor rod;Drainage ditch, the drainage ditch is set in the gap between boss and waterproof wall, water collecting cover is fixedly installed in the drainage ditch inside, multiple evenly distributed net water inlet holes are set to the side of water collecting cover close to waterproof wall, water pump is fixedly installed in the inside one side of water collecting cover, the output end of water pump is fixedly installed with drain pipe, inner wall, the inner wall is set to boss upper surface four sides, by waterproof wall outside water resistance, flow guide mechanism infiltration guide and drain, double membrane board internal protection, form "three lines of defense", solve the problem of traditional scheme "single water resistance easy failure", even if local infiltration, also can be discharged in time through drainage system, reduce structure damage risk.

The utility model provides a radiotherapy positioning device with a double-layer film. The radiotherapy positioning device comprises a supporting frame, a lower positioning film and an upper positioning film. The lower positioning film comprises a lower frame and a lower thermoplastic film; a plurality of first shaping holes are formed in the lower thermoplastic film; the upper positioning film comprises an upper frame and an upper thermoplastic film; the upper thermoplastic film is provided with a plurality of second shaping holes. During use, the supporting frame is fixed on the head, neck and shoulder bottom plate, and the lower positioning film is heated and then fixedly mounted above the supporting frame; the patient lies on the back and is pressed downwards, and the lower thermoplastic film is attached to the body surface of the patient and cured; the upper positioning film is heated and covers the front surface of the patient, the upper frame is pulled downwards and fixedly connected with the lower frame, and the lower thermoplastic film is attached to the body surface of the patient and cured. The lower thermoplastic film is easy to operate, short in curing time and free of peculiar smell in the shaping and curing process, meanwhile, the lower thermoplastic film is provided with the air holes, heat dissipation can be facilitated, and therefore the comfort level and the treatment effect of a patient can be guaranteed.

The application discloses a kind of fluidized bed-double membrane method deep fluorine removal device, including several fluidized bed reactors, the water inlet of fluidized bed reactor is connected with water inlet pipe by first electromagnetic valve, stainless steel filter screen is equipped at the lower end of fluidized bed reactor, load layer seed is equipped below stainless steel filter screen, and fluidized bed clarification zone is above stainless steel filter screen, the ultrafiltration water inlet of first ultrafiltration membrane column is connected with the water outlet of fluidized bed by first high-pressure diaphragm pump, the ultrafiltration water outlet of first ultrafiltration membrane column is communicated with adjusting tank, adjusting tank is connected with the reverse osmosis water inlet of reverse osmosis membrane column by second high-pressure diaphragm pump, and the reverse osmosis water outlet of reverse osmosis membrane column is connected with water production tank.The fluoride ion concentration of the present application is far higher than 10mg / L of GB 30484-2013 battery industry pollutant discharge standard, and reaches 1mg / L below stably, so that the water quality of effluent meets semiconductor industry reuse water standard, and the reuse rate of industrial water is improved.

The invention discloses a method for preparing a hydrophobic-hydrophilic double-layer membrane by using soybean lipophilic protein, and relates to the technical field of soybean processing application. The method comprises the following steps: (1) extracting soybean lipophilic protein; (2) preparing a soybean lipophilic protein film; (3) preparing a chitosan film-forming solution; and (4) pouring the chitosan film-forming solution onto the soybean lipophilic protein film to obtain the double-layer film. Soybean lipoprotein and chitosan with different concentrations are used as raw materials, and the method has the advantages of being simple in process, safe to operate and the like. The hydrophobic property of the soybean lipophilic protein and the hydrophilic property of the chitosan are utilized to develop a double-layer film with complementary characteristics, the outer layer forms a moisture-proof barrier to prevent moisture from permeating from the external environment, and the inner layer can retain the moisture to help maintain the required humidity.

The application discloses a peroxide-containing liposome and a preparation method and application thereof. The peroxide-containing liposome is a spherical vesicle with a double-membrane structure formed by lipid molecules containing one or more peroxide groups, and the lipid molecules contain carbon-carbon double bonds. The peroxide-containing liposome can be obtained by mixing and treating peroxide-containing lipid molecules with an aqueous system, wherein the peroxide-containing lipid molecules are obtained by reacting unsaturated lipid molecules containing-CH=CH- and / or-C=C- with an additive in the presence of oxygen and a solvent, and the additive is selected from one or more of lipoxygenase, an oxidation catalyst and an oxidant. Through in-vitro cell and in-vivo animal experiments, it is found that the peroxide-containing liposome can kill tumor cells, can be used as a sensitizer and cooperated with other tumor treatment methods, effectively improves the treatment effect on tumors, and has a good application prospect in the aspect of anti-tumor.

The utility model relates to the technical field of pressure release valves, and discloses a double-membrane pressure release valve structure, which comprises an outer membrane main body, an adjusting mechanism and a pressure release mechanism, the pressure release mechanism comprises a mounting seat, the bottom end of the mounting seat is fixedly connected with the top end of the outer membrane main body through a bolt, the top end of the mounting seat is provided with a pressure release port, and the outer membrane main body is fixedly connected with the pressure release port. The top end of the mounting base is fixedly connected with a cavity shell through a bolt, the bottom end of the cavity shell is fixedly connected with a diaphragm, a gap is reserved between the top end of the diaphragm and the inner wall of the top end of the cavity shell to form an air chamber, a sealing plate is fixedly connected to the position, corresponding to the pressure relief opening, of the top end of the diaphragm, and a supporting column is arranged at the position, corresponding to the bolt, of the bottom end of the cavity shell; the supporting column is used for supporting the cavity shell to ensure that a gap is reserved between the bottom end of the cavity shell and the top end of the mounting seat; the utility model provides a double-membrane pressure relief valve structure which can prevent a pressure relief structure from being opened and closed suddenly, reduce impact force and flexibly adjust the pressure value during pressure relief at the same time.

The application provides a kind of ultrafiltration nanofiltration double membrane method drinking water treatment device, relating to water treatment technical field.The drinking water treatment device based on ultrafiltration nanofiltration double membrane method, including base and rack, the upper side of the base is fixedly connected with rack, the lower side of the one side of the rack is fixedly connected with water inlet pipe, the lower side of the one side of the rack away from water inlet pipe is fixedly connected with water outlet pipe, the water outlet end of the water outlet pipe is provided with water outlet valve, the upper side of the rack above water inlet pipe is equidistantly provided with multiple ultrafiltration chambers, multiple the inside of the ultrafiltration chamber is provided with ultrafiltration membrane ultrasonic cleaning assembly.The ultrafiltration membrane ultrasonic cleaning assembly and nanofiltration membrane ultrasonic cleaning assembly provided in the application can efficiently strip stubborn pollutants on the surface of membrane through the targeted application of 28kHz low-frequency ultrasonic and 40kHz high-frequency ultrasonic, avoid damage to the structure of membrane caused by traditional chemical cleaning, significantly prolong the service life of ultrafiltration membrane and nanofiltration membrane, and reduce the replacement cost of membrane assembly.