18109results about How to "Easy to separate" patented technology

The invention discloses a bad traffic monitoring method and system based on an LSTM and a clustering algorithm, belongs to the technical field of network security, and efficiently converges network traffic by using a BPF technology. The method comprises the following steps: accurately identifying fragmented traffic through an LSTM network, and capturing a complex dependency relationship by using a special memory unit structure of the LSTM network; performing session recombination by adopting an FCM clustering algorithm, restoring a complete network session, and quickly identifying malicious traffic through feature matching; and finally, timely treatment measures are taken for the confirmed malicious traffic. According to the method, rapid and accurate detection and identification of bad website traffic fragmentation behaviors are realized, and the technical problem that a traditional method is difficult to deal with is solved; through efficient caching and recombination mechanisms, the efficiency and accuracy of malicious traffic processing are improved; intelligent disposal measures are adopted, and it is ensured that malicious traffic is effectively restrained in time; the overall protection capability of network security is improved, and enterprise network resources and user data security are protected.

The invention discloses a back contact solar cell, an assembly and a system. The back contact solar cell comprises a silicon substrate, the back surface of the silicon substrate comprises a plurality of first areas and a plurality of second areas, the first areas and the second areas are arranged at intervals, and each of the first areas and the second areas comprises a passivation selective contact area and a non-passivation selective contact area; the non-passivation selective contact area comprises a passivation anti-reflection layer arranged on the surface of the silicon substrate; the passivation selective contact area of the first area comprises a first passivation layer, a selective transmission layer and a first metal electrode which are sequentially stacked on the surface of the silicon substrate from inside to outside. According to the back contact solar cell, the passivation layer and the selective transmission layer are arranged in the first region and combined with the passivation anti-reflection layer, the excellent passivation contact effect is achieved, a narrow-band-gap highly-doped silicon material does not need to be used, the optical parasitic absorption loss is reduced, the photoelectric conversion efficiency is improved, and then the performance of the back contact solar cell is improved.

The invention belongs to the technical field of recycling of electronic waste lithium ion batteries, and particularly relates to a method for separating and recycling valuable metal elements from waste lithium ion batteries and regenerating a positive electrode material. The invention provides a method which innovatively combines a deep eutectic solvent and mechanochemical activation and is used for efficiently separating and recycling valuable metal elements from waste lithium ion batteries and regenerating a positive electrode material. According to the method, efficient leaching of the waste positive electrode material and effective separation of valuable metal elements of lithium, nickel, cobalt and manganese are achieved through the synergistic effect of high dissolving capacity of the eutectic solvent and mechanochemical activation. The mild and efficient method is adopted, the problems that a deep eutectic solvent is complex to prepare and difficult to store, the leaching condition of a positive electrode material is harsh, and the consumption of a metal recovery reagent is large are solved, and high-selectivity leaching of lithium ions and separation and recovery of valuable metal elements of nickel, cobalt and manganese are achieved.

The invention relates to plastic recovery equipment, and belongs to the technical field of plastic bottle recovery, the plastic recovery equipment comprises a first crushing cylinder and a second crushing cylinder, the middle parts of the first crushing cylinder and the second crushing cylinder are communicated with each other, and a feed hopper is fixedly communicated above the communication part of the first crushing cylinder and the second crushing cylinder; the lower portion of the communicating part of the first smashing cylinder and the second smashing cylinder is fixedly communicated with a separating cylinder, the lower side of the separating cylinder is communicated with a cleaning cylinder, smashing assemblies rotating oppositely are arranged on the inner side of the first smashing cylinder and the inner side of the second smashing cylinder correspondingly, and guide sleeves are fixedly arranged on the two sides of the upper portion of the inner side of the separating cylinder correspondingly; sliding plates are arranged on the sides, close to each other, of the two guide sleeves in a front-back sliding mode, a transmission mechanism for driving the two sliding plates to slide oppositely at the same time is arranged on the outer side of the separation barrel, and an air blowing mechanism is arranged on one side of the separation barrel.

The invention provides a centrifugal air conditioner gas-liquid separator, and belongs to the technical field of gas-liquid separators, the centrifugal air conditioner gas-liquid separator comprises a cylinder body and a cylinder cover, the cylinder body is connected with a drainage pipe and an air inlet pipe, the cylinder cover is connected with an exhaust pipe, a supporting ring and a fixing ring are arranged in the cylinder body, a drainage plate, a wind shield and a side plate are arranged in the cylinder body, and a backflow pipe is arranged on the outer wall of the cylinder body. The filter assembly comprises a water absorption piece; the extrusion assembly comprises a telescopic air bag and a fixing plate; the guide assembly comprises a drainage cover, an outer tube and an inner tube, and a rotating rod is arranged in the inner tube; the device has the beneficial effects that the wind shield drives the rotating rod to rotate, so that the turbine fan blades rotate to promote gas emission, and meanwhile, the cleaning plate is driven to clean the surface of the lower filter plate, so that the blockage condition is reduced, the filtering effect is improved, timely and effective cleaning is ensured, in addition, the water absorption part can be automatically extruded to drain water, the maintenance and replacement frequency is reduced, and the working efficiency is improved. The use efficiency is improved.

The invention discloses a multi-scale adaptive time sequence InSAR (Interferometric Synthetic Aperture Radar) earth surface deformation extraction method, and relates to the field of remote sensing signal processing. The method comprises the following steps of: constructing an unwrapped time sequence InSAR phase simulation data set, performing pixel-by-pixel time sequence empirical mode decomposition on a time domain, obtaining a time sequence intrinsic mode function at the same pixel position, and constructing a FastICA wavelet enhancement denoising algorithm on a space domain: performing two-dimensional multi-stage wavelet decomposition on the intrinsic mode function of each dimension by taking a power spectrum entropy as a cut-off condition, the method comprises the following steps of: acquiring a wavelet approximation coefficient of each level and a detail coefficient, performing noise reduction and dimension reduction processing and reconstruction on the wavelet approximation coefficient and the detail coefficient of each level, and finally performing wavelet reconstruction on the updated wavelet coefficient to obtain a processed time sequence InSAR phase simulation data set. The method provided by the invention is based on data self-driving, self-adaptive decomposition is carried out on phase signals from two scales of time and space, earth surface deformation related signals can be effectively captured, other phase signals can be separated and explained, and a scientific theoretical basis is provided for high-precision earth surface deformation monitoring.

The invention relates to the technical field of drilling machines, and provides an automobile lower ball head machining drilling machine with a chipping cleaning function, which comprises a machine body, a workbench, a main shaft, a drill bit and a sprayer, and further comprises a protection mechanism, a filtering mechanism, a purging pipe and a dumping mechanism, the protection mechanism is used for protecting a drilling position, and the protection mechanism comprises a protection barrel and a sealing cover; the protective barrel is arranged on the machine body, the workbench is arranged in the protective barrel, the sealing cover is arranged on the main shaft, the filtering mechanism is used for filtering metal chippings and comprises a liquid collecting hopper and a filter screen, the liquid collecting hopper is arranged below the protective barrel, the filter screen is rotatably arranged in the liquid collecting hopper, and the blowing pipe is arranged on the sealing cover. And the pouring mechanism is used for pouring the liquid collecting hopper and pouring out the metal chippings in the filter screen, and by means of the technical scheme, the problem that in the prior art, cutting liquid is mixed with cutting chippings, so that subsequent drilling machining is affected is solved.

The invention discloses a magnetic biochar composite adsorbent as well as a preparation method and water treatment application thereof, and relates to the technical field of adsorption materials. The preparation method consists of a biochar matrix and magnetic particles loaded on the surface and in pores of the biochar matrix, and comprises the following steps: preparation of the biochar matrix: step 1, firstly, selecting a biomass raw material; the magnetic charcoal composite adsorbent has unique structure and performance advantages, abundant pore structures and surface functional groups of the adsorbent can provide a large number of adsorption sites for pollutants, and due to the existence of magnetic particles, after the adsorption process is completed, the adsorbent only needs to be placed in an external magnetic field such as an electromagnet and a permanent magnet, so that the magnetic charcoal composite adsorbent can be used for adsorbing the pollutants. The adsorbent can be rapidly separated from the solution or the suspension, the separation time can be controlled within 1-10 minutes, the recovery efficiency of the adsorbent is greatly improved, the treatment cost is reduced, and the adsorbent can be repeatedly used and has good economical efficiency and environmental protection property.

The invention belongs to the technical field of pervaporation membrane preparation and application, and relates to a covalent organic framework pervaporation hybrid membrane with a combination sequence regulation interlayer structure, in particular to preparation of the pervaporation membrane and application of the pervaporation membrane in water / butanol separation. Adding the aldehyde monomer solution into the amino monomer solution, and standing for reaction; taking a water phase, and carrying out dialysis treatment; diluting the covalent organic framework nanosheet dispersion liquid to obtain dispersion liquid A; adjusting the pH of a polyelectrolyte aqueous solution to obtain a solution B; adjusting the pH value of the metal ion dispersion liquid to obtain a solution C; uniformly mixing the dispersion liquid A and the solution C at normal temperature, adding the solution B, and heating for reaction to obtain a membrane casting liquid; and carrying out suction filtration on the membrane casting solution to a base membrane, and carrying out vacuum drying to obtain the pervaporation membrane. At 70 DEG C, the separation flux of a 10wt% / 90wt% water / butanol mixture is 7.52 g / (m < 2 > h), and the separation factor reaches 13709.

The invention relates to the technical field of waste tire recovery, in particular to a steel wire separation device for waste tire recovery. Comprising a chassis; the number of the rotating shafts is two, and the rotating shafts are rotationally connected to the bottom frame; the number of the separating rollers is the same as that of the rotating shafts, and the separating rollers are arranged on the adjacent rotating shafts respectively; the supporting rod is fixedly connected to the bottom frame; the supporting cylinder is fixedly connected to the supporting rod; the auger rod is rotationally connected between the bottom frame and the supporting cylinder; and the cutting mechanism is arranged on the upper side of the bottom frame and used for cutting off the steel wire stripped from the tire opening ring. By means of the separation roller, the movement directions of the tire opening ring in the rubber and steel wire separation (the tire opening ring outer layer rubber crushing process and the steel wire discharging process) process are consistent, and therefore the situation that in the existing separation technology, a single-side feeding and discharging mode is adopted, and consequently the efficiency is low when steel wires in the tire opening ring are separated is avoided.

The invention belongs to the technical field of anchor rods, and particularly relates to a laser cutting machine for pipe groove machining, which comprises a workbench, a support frame is fixedly mounted on the workbench, an adjusting assembly is arranged on the support frame, a laser cutting assembly is mounted on the adjusting assembly, a mounting hole is formed in a support block, and a cylinder is fixedly mounted in the mounting hole. A driving assembly is arranged at the top of the cylinder and connected with a limiting assembly, a feeding assembly is arranged in the cylinder, and an annular sliding groove is embedded in the cylinder. According to the laser cutting machine for pipe groove machining, adsorbates on the surface of a pipe are conveniently and automatically removed through an annular gear and a cleaning ring, a second double-output-shaft motor works to drive the cleaning ring to move, the cleaning ring rotates to remove impurities adsorbed on the pipe, and the purpose of cleaning the surface of the pipe to be machined is achieved; and the situation that too many impurities are adsorbed on the pipe, the transmittance of laser beams is reduced, and therefore the cutting precision and consistency are affected is effectively avoided.

The invention relates to a phase change sweating cooling porous structure and application thereof in an aircraft reentry capsule, the porous structure comprises a porous layer comprising a plurality of densely arranged porous units; the liquid separation cavity is connected with the porous layer; the liquid storage cavity is used for storing a cooling agent; the coolant conveying pipeline is connected with the liquid storage cavity and the liquid separation cavity; the regulating valve is arranged on the coolant conveying pipeline; each porous unit comprises a small-porosity porous part as well as a large-porosity porous part and a liquid channel which are respectively connected with the small-porosity porous part, and a gas channel is formed between the small-porosity porous part and the large-porosity porous part; and a coolant is introduced from the liquid channel, permeates into the small-porosity porous part, escapes from the large-porosity porous part along the gas channel after being gasified, and forms a gas film for heat insulation. Compared with the prior art, rapid gas-liquid separation and partitioned flow regulation and control of the coolant in the sweating cooling porous layer can be effectively achieved, and the phase change sweating cooling efficiency and reliability are effectively improved.

The invention relates to the technical field of barium hydroxide, and discloses a preparation method of barium hydroxide octahydrate. Epoxidized soybean oil and iminodiacetic acid react to obtain a sodium iminodiacetate modified epoxidized soybean oil trapping agent. According to the method, witherite raw ore is used as a raw material, a sodium iminodiacetate modified epoxidized soybean oil trapping agent, an inhibitor and a foaming agent are added for separation and mineral separation, the separation recovery rate of the obtained high-grade witherite reaches 83.7-91.5%, and the grade reaches 57.7-63.8%. The high-grade witherite is used as a barium source, the yield of the prepared barium hydroxide octahydrate reaches 91.0-91.8%, and the purity of the prepared barium hydroxide octahydrate reaches 97.5-98.7%.

The invention discloses a graphdiyne multilayer composite membrane and a preparation method thereof, and belongs to the technical field of membrane separation. A porous base membrane with an alkynyl layer is obtained by adopting a two-step modification method, then the porous base membrane is soaked in a solution containing a graphdiyne monomer and a catalyst, and a reaction is performed at a certain temperature, so that a graphdiyne material fully grows on the surface of the porous base membrane. Adding a membrane casting solution formed by mixing an organic polymer, a cross-linking agent, a catalyst and an organic solvent to the surface of the graphdiyne-loaded porous base membrane, volatilizing the organic solvent, and curing at 80 DEG C to form the membrane. The ethanol permselective membrane has a three-layer membrane structure, namely the organic polymer layer, the ultrathin graphdiyne transition layer and the porous support layer, so that the problems of agglomeration and pore permeation of a nano material are effectively avoided, and the adsorption process of ethanol is further enhanced. The membrane prepared by the invention has higher pervaporation alcohol permeation performance, can efficiently and stably recover alcohols, and provides reference for the development of a novel pervaporation membrane structure with preferential alcohol permeation.

The invention discloses a supported double perovskite photocatalytic material which is prepared by the following steps: putting copper nanoparticles and double perovskite Cs2NaBiCl6 into a water-absolute ethyl alcohol mixed solution, carrying out ultrasonic dispersion, heating the dispersion solution to 55-65 DEG C, carrying out cooling crystallization at a rate of 1-2 DEG C / min, completing the reaction when the temperature is reduced to 25 DEG C, carrying out solid-liquid separation on the reaction product, and washing and drying the solid, the Cu nanoparticle-loaded double-perovskite photocatalytic material is applied to photocatalytic reduction of CO2, the catalyst has the characteristics of high reduction catalysis efficiency and good selectivity, the performance is stable after repeated cyclic utilization, and the material disclosed by the invention is simple in preparation process, high in efficiency and suitable for large-scale production and market popularization and application.

A refrigeration system utilizing a torsional elastothermal effect of shape memory alloy fibers, the refrigeration system comprising: a) a torsional elastothermal refrigerator having a fluid inlet and two fluid outlets; the heat transfer fluid pipeline system comprises a refrigerator, a radiator, a three-way valve, a liquid storage buffer and a water pump, is provided with a motor, controls switching of cold and hot flow channels in pipeline circulation by controlling the three-way valve, and is connected with the torsion elastic heat refrigerator in the system; the heat exchange and storage device comprises but not limited to a spiral coil radiator made of copper pipes and a heat storage container, the spiral coil radiator and the heat storage container are both connected with the heat transfer fluid pipeline system, and the memory alloy fibers are arranged in the torsion elastic heat refrigerator. The system is based on a novel driving mode of a periodic distortion structure, and has the effects of high efficiency, low hysteresis and low driving stress.

The invention relates to a catalyst for ethylene oxide ring-opening polymerization and a preparation method thereof, and belongs to the technical field of high polymer material synthesis, and the catalyst is a composite structure based on a silicon dioxide nanoparticle loaded bimetal organic complex; a modified nitrogen-containing polydentate ligand is prepared by adopting a special method, is coordinated with metal ions through covalent bonds and is loaded on silicon dioxide nanoparticles; by utilizing the high dispersity and stability of the silicon dioxide nanoparticles and the synergistic catalytic effect of the bimetal organic complex, the catalytic effect is effectively improved, the polymerization process is accelerated, the polymerization stability is enhanced, the polymerization molecular weight is improved, and the distribution is narrow.

The invention belongs to the technical field of environmental sanitation machinery, and particularly relates to a high-speed low-noise centrifugal fan with an air filtering effect, the high-speed low-noise centrifugal fan comprises a fan volute, a fan impeller is mounted in the fan volute, the fan impeller comprises a front disc, a middle disc and a plurality of fan blades, the fan blades are located between the front disc and the middle disc, and the fan blades are arranged in the fan volute. A flow channel of the fan impeller is formed by the front disc, the middle disc and the space between every two adjacent fan blades, and a driving motor is installed on the rear side of the fan volute. According to the high-speed low-noise centrifugal fan with the air filtering effect, brand new plans are made on the blade shape, the blade structure, the volute, the volute tongue and the overall structure of the fan, and particularly, the cyclone separator is additionally arranged at the air inlet of the fan, so that high-speed air entering the volute of the fan is rapidly separated and purified; and dust and other garbage in the gas are settled and separated, so that the quality of air discharged into the atmosphere from an outlet of the fan is improved, and secondary pollution of environmental sanitation operation is reduced.

The invention discloses a monovalent selective cation exchange membrane, a preparation method thereof and an electrodialysis device, and relates to the technical field of ion exchange membranes. The preparation method of the monovalent selective cation exchange membrane comprises the following steps: soaking a cation exchange membrane loaded with a photoinitiator in a co-deposition modification solution containing dopamine, polyethyleneimine and chitosan, carrying out a co-deposition reaction under radiation initiation of ultraviolet light, taking out the cation exchange membrane after the reaction is finished to obtain a co-deposition modified membrane, and then carrying out heat treatment to obtain the monovalent selective cation exchange membrane. The monovalent selective cation exchange membrane is obtained. The ultraviolet light initiator and chitosan with certain adhesion are introduced in the co-deposition process, so that the co-deposition speed of dopamine and polyethyleneimine on the surface of the film is promoted, meanwhile, a base film and a co-deposition modified layer can be connected, the stability of the modified film is improved, the pore size screening effect is improved, and the service life of the film is prolonged. And moreover, ion exchange sites of the modified membrane are not occupied, monovalent and multivalent cations are effectively separated, and meanwhile, good ion flux is achieved.

The invention relates to a preparation method for improving a sodium alginate pervaporation membrane by using a two-dimensional leaf-shaped zeolite imidazole framework (ZIF-L) material, and particularly relates to a preparation method for improving a sodium alginate pervaporation membrane by using a two-dimensional leaf-shaped zeolite imidazole framework (ZIF-L) material. The pervaporation mixed matrix membrane comprises a base membrane and a separation layer membrane, the base membrane adopts a polyacrylonitrile (PAN) membrane, and the separation layer is composed of ZIF-L and sodium alginate. According to the invention, the distribution of ZIF-L in the membrane is improved, directional arrangement is formed, and the separation effect and selectivity of the composite membrane are improved. A novel process is adopted, the defect problem of the ZIF-L-SA membrane is eliminated, the continuous ultrathin ZIF-L membrane is prepared through a secondary seed growth method, and the performance of the two-dimensional ZIF-L membrane is improved. The ZIF-L synthesis conditions are mild, the method is simple, hydrophilic modification of the membrane surface is achieved, an internal water molecule transmission channel is constructed, and the separation factor and stability of the membrane are improved. The prepared high-flux pervaporation membrane has a wide application prospect.

The invention discloses a turbine device with an oil-gas separation structure and an aero-engine, the turbine device with the oil-gas separation structure comprises a turbine shaft, a transmission shaft, a first bearing, a first bearing seat and an oil-gas separation ring, the periphery of the turbine shaft is sleeved with the transmission shaft, and a lubricating oil cavity is formed in the space between the first bearing seat and the turbine shaft; a first exhaust cavity is defined between the oil-gas separation ring and the transmission shaft, a second exhaust cavity is defined between the transmission shaft and the turbine shaft, oil-gas separation holes are distributed in the oil-gas separation ring, and the oil-gas separation holes communicate the lubricating oil cavity with the first exhaust cavity; a first vent hole is formed in the transmission shaft, and the first exhaust cavity is communicated with the second exhaust cavity through the first vent hole; a second vent hole is formed in the second end, corresponding to the second exhaust cavity, of the turbine shaft, and the second exhaust cavity is communicated with a central shaft hole of the turbine shaft through the second vent hole. The turbine device with the oil-gas separation structure is provided with the oil-gas separation structure, and multi-stage oil-gas separation operation can be achieved.

The invention relates to the technical field of vacuum coating, in particular to a vacuum coating machine capable of improving coating purity, which comprises a bearing frame and a coating cavity mounted in the bearing frame, and the coating cavity is of an inverted conical structure; a rotary driving rod is mounted in the middle of the upper part of the coating cavity in a penetrating manner, and a non-contact transmission assembly is mounted above a main mounting rod, so that friction caused by contact is avoided; the interior of the lower portion of the bearing frame is connected with the evaporation source carrying table through a rotary lifting control mechanism. According to the vacuum coating machine capable of improving the coating purity, the cleanliness of a coating area can be improved through the non-contact transmission assembly, so that the coating purity and the product performance can be further improved, airflow generated by pressure difference can be reduced through the arrangement of the hollow interlayer groove, and the situation that the purity and the adhesive force of a formed film are affected due to the fact that tiny dust particles are raised is avoided; therefore, the cleanliness of the coating area can be further improved, and the coating purity is further improved.

The invention discloses a high-selectivity magnesium-lithium separation nanofiltration membrane based on a polyolefin base membrane and a preparation method and application of the high-selectivity magnesium-lithium separation nanofiltration membrane based on the polyolefin base membrane. The preparation method comprises the steps that the polyolefin base membrane is in single-face contact with an organic phase monomer solution containing an isophthaloyl chloride monomer or a paraphthaloyl chloride monomer, and the redundant solution is poured out; one side, contacted with the organic phase monomer solution, of the obtained membrane is contacted with a polyethyleneimine-containing aqueous phase monomer solution, an interfacial polymerization reaction is carried out, the obtained membrane is placed in a drying oven for heat treatment, then the membrane is soaked in an organic solution for activation, and the polyvinyl composite nanofiltration membrane is obtained. The nanofiltration membrane has high magnesium ion interception and high magnesium-lithium separation selectivity in a mixed solution with a high magnesium-lithium ratio, the preparation process is simple, conditions are mild, amplification and industrial production are easy to realize, and the nanofiltration membrane has good long-term operation stability.

The utility model discloses a double-opening concrete blank turnover machine, and belongs to the field of concrete product production equipment. The turnover machine comprises a base, wherein a support is arranged on the base; the first overturning assembly is connected with the support in a hinged mode, and the first overturning driving piece is arranged on the base and drives the first overturning assembly to rotate; the second overturning assembly is connected with the support or the first overturning assembly in a hinged mode, and the second overturning driving piece is arranged on the base and drives the second overturning assembly to rotate; and the locking device is connected with the first turnover assembly and the second turnover assembly when the first turnover assembly and the second turnover assembly intersect at 90 degrees. Feeding and discharging work on the two sides of the upender can be carried out at the same time, and the working efficiency of the upender is effectively improved.

The invention discloses a pipeline combined type single-autorotation intelligent counter-current chromatograph, and relates to the technical field of counter-current chromatographs, the pipeline combined type single-autorotation intelligent counter-current chromatograph comprises a rotating disc, a surrounding separation channel is formed in the rotating disc, a filling block is mounted in the surrounding separation channel, one end of the rotating disc is rotatably mounted through a liquid slip ring, and the other end of the rotating disc is rotatably mounted through a liquid slip ring. The other end of the rotating disc is connected with a main shaft, the main shaft is connected with a driving device, unwinding is conducted in a liquid slip ring mode, the rotating disc can complete unwinding action under single rotation, mixing of two phases in the separation channel can be enhanced through a filling block, and therefore arrangement of a planetary gear train can be abandoned; the main shaft is directly driven by the driving equipment to rotate, and the main shaft drives the rotating disc to rotate to realize two-phase separation and extraction, so that a higher rotating speed can be obtained, and the separation efficiency and effect are improved; and secondly, after the planetary gear train is abandoned, the equipment noise is greatly reduced, and good dynamic balance is achieved.

The invention relates to a gas recovery well downhole multistage gas flow self-adaption cyclone separation device which comprises a degassing structure and a deposition reinjection structure, the degassing structure comprises a first-stage gas-liquid separation module, and the first-stage gas-liquid separation module comprises a gas-liquid inlet outer pipe, an upper gas pipe, a gas return spiral flow channel, a vent pipe, an upper liquid gathering conical pipe and a gas return liquid conveying conical pipe; an upper air guide pipe is arranged on the upper portion of the air return spiral flow channel, an air return conical cavity is formed in the air return spiral flow channel, the upper air guide pipe is communicated with the air return conical cavity, a lower port of the air return conical cavity is in butt joint with an air return infusion conical pipe, and the upper air pipe penetrates out of the upper air guide pipe. An annular space between the vent pipe and the upper air pipe and an annular space between the upper air guide pipe and the upper air pipe form an upper air channel; the upper liquid gathering conical pipe surrounds the outside of the air returning and liquid conveying conical pipe; the deposition reinjection structure comprises a lower spiral flow channel, a lower liquid gathering conical pipe, an inverted cone and a centrifugal pump. The coalescence reinjection technology and the rotational flow technology are combined, the efficiency is high, and the service life is long.

The invention relates to the technical field of solar cells, and particularly discloses a back contact solar cell, a cell module and a photovoltaic system, and the cell comprises a silicon substrate which is provided with a light receiving surface and a backlight surface which are opposite to each other; a doping layer and an electrode layer are sequentially arranged on the backlight face in the direction away from the light receiving face, the doping layer comprises N-type doping layers and P-type doping layers which are alternately arranged at intervals, the electrode layer comprises N-type electrodes and P-type electrodes, the electrical conductivity of the silicon substrate, the electrical conductivity of the P-type doping layers and the electrical conductivity of the N-type doping layers are sequentially increased, and the electrical conductivity of the P-type doping layers and the electrical conductivity of the N-type doping layers are sequentially increased. When the silicon substrate is a P-type silicon substrate, the total length of all the N-type electrodes is greater than the total length of all the P-type electrodes; when the silicon substrate is an N-type silicon substrate, the total length of all the P-type electrodes is larger than the total length of all the N-type electrodes. Separation of photo-generated electron hole pairs and collection of current can be enhanced, series resistance can be effectively reduced, power loss in the cell is reduced, filling factors are improved, meanwhile, the effective power generation area of the silicon substrate is increased, more photo-generated carriers are generated, short-circuit current is improved, and the conversion efficiency of the cell is effectively improved.

The invention belongs to the field of MOF (Metal Organic Framework) films, and discloses a two-dimensional metal-organic framework film composite film as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing ZIF-L nanosheets into a water phase solution containing MPD, camphor-10-sulfonic acid and TEA to obtain an MOF water phase monomer solution; adding TMC into an n-hexane reagent to obtain an organic phase monomer solution; fixing the wet PES ultrafiltration membrane, injecting the MOF water-phase monomer solution, carrying out suction filtration below the PES ultrafiltration membrane, removing the excess solution, keeping the suction filtration state, and immediately pouring the organic-phase monomer solution onto the surface of the PES ultrafiltration membrane from the upper part for reaction; and drying the obtained film at 60-80 DEG C for 10-15 minutes to obtain the two-dimensional metal-organic framework film composite film. The composite membrane has a good separation effect and can be applied to textile printing and dyeing wastewater treatment.

The invention belongs to the technical field of super-hydrophobic materials, and particularly relates to a preparation method and application of magnetic response multifunctional super-hydrophobic biomass aerogel. The super-hydrophobic PDMS-coated CMIL-101 / CS aerogel is prepared by combining chitosan (CS), a magnetic porous carbon material (CMIL-101) and polydimethylsiloxane (PDMS) through a freeze drying technology, so that efficient oil-water separation and organic pollutant microplastic removal are realized. The aerogel utilizes magnetic response and photo-thermal characteristics, promotes oil adsorption and treats high-viscosity oil in a magnetic field, simplifies the purification process, and has important application value for water body remediation.

The invention relates to the field of wastewater treatment, in particular to a wastewater treatment method based on air flotation separation, which comprises a barrel, an inlet and outlet unit, a driving motor, a rotating rod, a multi-stage electric push rod, a partition plate and the like, the cylinder body is connected with an inlet and outlet unit for feeding and discharging water; the barrel is rotationally connected with a rotating rod, and an output shaft of the driving motor is fixedly connected with the rotating rod; a plurality of multi-stage electric push rods are fixedly connected to the bottom of the barrel; the telescopic parts of all the multi-stage electric push rods are fixedly connected with a partition plate jointly, and the partition plate is in sliding connection with the inner wall of the barrel. Wastewater penetrates through the filter screen from bottom to top, large deposited impurities in the wastewater are filtered, and the filtered large impurities can precipitate downwards under the action of self gravity and cannot be accumulated and attached to the surface of the filter screen, so that the content of the impurities attached to the surface of the filter screen is effectively reduced.