63 results about "Micropore filtration" patented technology

The application discloses a kind of intelligent switching water sample pretreatment system and method, system includes: combined sand filter sample barrel, for collecting water sample to be pretreated, initial water sample turbidity value acquisition is carried out, while water sample preliminary pre-filtering treatment is carried out;Positioning floating sampling device, for fixing to take supernatant after water sample settlement;Microfiltration module, for the microfiltration of ultrahigh turbidity water sample;Sample water transfer pump, for transmitting supernatant in combined sand filter sample barrel to microfiltration module;Sample collection barrel, for collecting and detecting water sample quantity after processing, for instrument or laboratory personnel to sample analysis;Valve assembly, by valve opening and closing, water sample is switched different pretreatment mode;Cleaning assembly, including rotary high-pressure spray head and self-heating ultrasonic cleaning device, for cleaning system after pretreatment internal residual adherend.

The utility model discloses a high-temperature steam recycling device which comprises a direct heat exchange steam pipeline, an indirect heat exchange steam pipeline, a heat exchange condenser a and a cold medium pipeline, the direct heat exchange steam pipeline is communicated with a fine filter box, and a microporous membrane is arranged in the fine filter box. Steam output by the fine filter box is communicated with the mixing tank through an output pipeline and an indirect heat exchange steam pipeline, and the mixing tank is communicated with the heat exchange condenser a through a condensation pipeline. According to the high-temperature steam recycling device, alumina particles with the particle diameter larger than that of water vapor drop particles or aluminum hydroxide suspended solids which are not completely decomposed in steam are filtered and separated in a microporous filtering mode, the temperature of the alumina particles or the aluminum hydroxide suspended solids is increased in a compression mode, and the alumina particles or the aluminum hydroxide suspended solids are recycled through heat exchange and then enter the next condenser to be released, so that the temperature of the alumina particles or the aluminum hydroxide suspended solids is reduced; therefore, heat energy can be recycled, meanwhile, the recycling efficiency of condensate water can be improved, and waste of water resources and heat energy is avoided.

This invention provides an air supply and dust removal device for high-temperature corrosion prevention and control in coal-fired power plant boilers, comprising a cyclone separator and a microporous filter. The cyclone separator includes a separation shell, an air inlet, an exhaust outlet, and a first ash discharge outlet. The separation shell has a cylindrical separation chamber, and the air inlet, exhaust outlet, and first ash discharge outlet are respectively connected to the separation chamber. The air inlet is located at the upper part of the separation shell and is tangent to the outer wall of the separation shell. The exhaust outlet is located at the top of the separation shell, and the first ash discharge outlet is located at the bottom of the separation shell. The microporous filter includes a filter shell and a microporous filter element. The filter shell has an air inlet and an exhaust outlet, with the air inlet connected to the exhaust outlet. The microporous filter element is disposed inside the filter shell. The cyclone separator performs primary dust removal of large particles in the secondary air, and the microporous filter performs secondary dust removal of small particles in the secondary air, thereby achieving the removal of both large and small particles of dust in the secondary air.

The invention discloses a white granulated sugar juice filtering device and a filtering method thereof.The white granulated sugar juice filtering device comprises a filtering cartridge, a filtering assembly is connected to the interior of the filtering cartridge, a lifting assembly is connected to the exterior of the filtering cartridge, and a cleaning assembly is connected to the upper end of the filtering cartridge. The filter screen cylinder can preliminarily filter white granulated sugar particles contained in the white granulated sugar juice, and the microporous filter membrane has a fine pore structure and can further filter out large particles, microorganisms and impurities in the white granulated sugar juice, so that the filtering effect on the white granulated sugar juice can be improved, and the quality of the white granulated sugar juice is improved. The filtering device is used for solving the problem that white granulated sugar juice is difficult to filter more thoroughly due to the fact that only a common filter screen and a filter screen cylinder are adopted in a comparative patent. By arranging the lifting assembly, the servo motor drives the screw rod to rotate, so that the ball nut seat, the top plate, the filter screen cylinder and the microporous filter membrane are driven to lift, and the filter screen cylinder and the microporous filter membrane are conveniently taken out for thorough cleaning.

The application provides an integrated atomizer with a filter rod, electrodes, oil storage cotton and a filter rod are sequentially arranged in a smoke pipe, a through hole is arranged on the outer wall of a heating wire fixing smoke guide pipe, the heating wire is spirally wound on the cotton rod, the cotton rod passes through the through hole, the spiral heating wire is fixed in the through hole of the heating wire fixing smoke guide pipe, two pins of the heating wire are electrically connected with the positive electrode and the negative electrode of the electrode respectively, the oil storage cotton is of a hollow structure, the oil storage cotton is impregnated with tobacco tar, the heating wire fixing smoke guide pipe is hidden in the oil storage cotton, and the filter rod is connected to the rear end of the oil storage cotton, and the application has the beneficial effects that a filter rod is added at the suction nozzle, smoke passes through the filter rod for filtration, effectively solving the problems of oil absorption, oil explosion and condensate liquid inlet; a magnet is arranged at the atomizer interface to form a magnetic attraction structure, which is convenient to use; the filter rod is divided into two sections, taste particles are arranged between the two sections of microporous filter rods, the taste is enriched, the inventory cost is reduced, and the product line is enriched.

The invention relates to a preparation method of rare earth metal gadolinium doped red carbon dots, and belongs to the technical field of nano material synthesis and biomedical imaging. Aiming at the problems of low gadolinium ion doping efficiency, more impurity residues and single function in the existing carbon dot preparation, the method comprises the following steps: dissolving p-phenylenediamine and dicyandiamide in a specific molar ratio, adding a GdCl solution, and carrying out ultrasonic dispersion to form a uniform system; performing hydrothermal reaction by adopting a staged temperature control program to optimize the crystallinity of the carbon matrix; high-efficiency removal of impurities is realized through high-speed centrifugation, microporous filtration and molecular weight interception dialysis; and finally, performing low-temperature vacuum drying to obtain a powder product. The obtained gadolinium-doped red carbon dots have the characteristics of uniform particle size, abundant surface hydrophilic functional groups, stable red fluorescence emission and synergistic enhancement of magnetic responsiveness, and can be used for constructing a bimodal fluorescence-magnetic resonance imaging and diagnosis and treatment integrated platform in a living body.

The utility model discloses an improved culture bottle special for mycoplasma culture, and relates to the technical field of bioengineering. The bottle comprises a bottle body and a bottle cap, the inner side and the outer side of the periphery of a bottle opening in the upper side of the bottle body are respectively provided with a threaded structure, and the bottle body is transparent or semitransparent; the bottle cap is mounted on the bottle body through the bottle body outer side threads; a gas-permeable membrane assembly is arranged on the bottle cap, and the gas-permeable membrane assembly is composed of at least one layer of microporous filtering membrane and a supporting frame; an anti-adsorption coating is arranged on the inner wall surface of the bottle body; a solid culture medium is arranged in the bottom of the bottle body, the upper surface of the solid culture medium inclines to the bottle bottom, and a liquid culture medium is filled between the solid culture medium slope and the side wall of the bottle body; the anti-splashing device is installed in the bottle body through threads on the inner side of the bottle opening and is in an inverted circular truncated cone shape, and the interior of the anti-splashing device is hollow. By improving the material of the bottle body, optimizing the inner wall coating and arranging the breathable membrane assembly, the safety, reliability and visualization degree of the mycoplasma culture process are improved, and meanwhile, the risk of cross contamination is effectively reduced.

The utility model relates to the technical field of numerical control lathes, and discloses a cutting fluid spraying structure for a numerical control lathe, which comprises a numerical control lathe main body, a micropore filter screen is clamped in the middle of the top surface of the numerical control lathe main body, and a cutting fluid tank is fixedly arranged on the bottom surface of the numerical control lathe main body. Cooling fans are fixedly arranged on the periphery of the surface of the cutting fluid box. A conveying mechanism is fixedly arranged on one side of the outer surface of the cutting fluid box, a tool rest is arranged on one side of the top face of the numerical control lathe body, and an adjusting mechanism is fixedly installed on the outer surface of the tool rest. According to the cutting fluid spraying structure for the numerical control lathe, through the arrangement of the microporous filter screen and the cooling fan, after being used, cutting fluid falls into the cutting fluid box from the microporous filter screen, impurities in the cutting fluid are filtered through the microporous filter screen, the cooling fan is turned on, the used high-temperature cutting fluid is cooled, the cutting fluid is conveyed in a circulating mode through the conveying mechanism, and the cutting fluid is sprayed to the cutting fluid box. The cutting fluid can be reused, and the machining cost is saved.

The utility model relates to the technical field of industrial product design, in particular to a model industrial product polishing device for industrial product design. The device comprises a grinding table, a penetrating groove is formed in the middle of the top surface of the grinding table, a microporous filter screen is clamped in the penetrating groove, a water tank is fixedly mounted on the bottom surface of the grinding table, and a cooling and scrap removing mechanism is fixedly mounted on one side of the outer surface of the water tank; fixing frames are fixedly arranged on the two sides of the top face of the grinding table. According to the model industrial product grinding device for industrial product design, through the arrangement of the cooling and scrap removing mechanism, a water source is injected into a water tank, when an industrial product is ground, a circulating water pump is started, the water source in the water tank is pumped out and conveyed into a water spraying pipe through a conveying pipe, and then the water is sprayed to the industrial product; chippings generated by industrial product polishing are adsorbed and cooled, a used water source flows back into the water tank after being filtered by the microporous filter screen, the water source can be repeatedly used, and the cost is saved.

The utility model provides a catalyst filtering kettle for production of cyclohexane carboxylic acid, the catalyst filtering kettle for production of cyclohexane carboxylic acid comprises a kettle body, a plurality of microporous filtering rods, a shunt pipe, a discharge assembly and a plugging assembly, the kettle body is provided with a feed port and a discharge port; the microporous filter rods are arranged in the kettle body and connected with the bottom of the kettle body, and the bottoms of the microporous filter rods are opened and communicated with the outside of the kettle body; the shunting pipe is communicated with the feeding hole of the kettle body and is communicated with the plurality of microporous filter rods; the discharging assembly comprises a plurality of screw rods and a driving assembly, the plurality of screw rods are in one-to-one correspondence with the plurality of microporous filter rods, the screw rods penetrate through the microporous filter rods, and the lower ends of the screw rods extend out of the kettle body; the power output end of the driving assembly is connected with the multiple screw rods and used for driving the screw rods to rotate. And the plugging assembly is used for plugging or opening the bottom opening of the microporous filter rod. According to the catalyst filtering kettle for producing the cyclohexane carboxylic acid, the microporous filtering rod does not need to be detached, and the operation is simple.

The utility model relates to the technical field of slurry concentration, in particular to microporous filtration concentration equipment, which comprises a tank body, a filter component and a clear water outlet pipeline valve group, a liquid inlet pipeline valve group, a feeding pipeline valve group and a gas inlet pipeline valve group are arranged on the tank body, and the filter component comprises a plurality of layers of first filter materials. The multiple layers of first filter materials are horizontally arranged in the tank body at intervals up and down, the clearing pipeline valve group comprises multiple groups of clearing valves, the multiple groups of clearing valves are respectively communicated with each layer of first filter material of the filter assembly, and a flow meter is arranged on a downstream confluence pipeline of the clearing pipeline valve group and is used for detecting the flow of clear liquid; the filter assemblies in the tank body are horizontally arranged at intervals up and down, so that the longitudinal linkage relationship and the transverse linkage relationship among the filter materials are broken through by adopting the horizontal arrangement, and each filter material is independently controlled; the problems of low filtering efficiency and poor filtering caused by simultaneous stopping of filtering of the multi-layer filtering materials of the layer due to closing of the corresponding layer of filtering materials after the filtering materials are exposed out of the liquid level are solved.

The invention discloses a high-efficiency low-consumption yellow phosphorus production device which comprises an electric furnace main body, a variable cross-section gas guide system, a rotational flow condensing tower group, a tail gas heat energy recovery unit and an intelligent sedimentation system, the variable-cross-section gas-guide tube is formed by combining an inclined taper tube and a gradually-expanding vertical tube, a spiral guide plate and a honeycomb dust removal module are arranged in the variable-cross-section gas-guide tube, and an atomizing phosphorus collecting mechanism is arranged on a descending section; the rotational flow condensing tower group improves the gas-liquid contact efficiency through a concentric double-cone flow guide structure and a high-speed atomizer; sensible heat is recovered by a tail gas total water seal integrated heat-conducting oil interlayer, and gradient utilization of tail gas heat energy is realized by combining a CO catalytic combustion chamber; the wastewater settling tank is provided with a three-stage gradient filtering system and is controlled through linkage of magnetic microporous filtering and spiral sludge discharging; according to the device, the dust removal rate is increased by 40%, the phosphorus yield reaches 92% or above, the comprehensive energy consumption is reduced by 18%, the problems that a traditional device is low in dust removal efficiency, high in energy consumption and insufficient in resource utilization rate are solved, and the device is suitable for large-scale industrial yellow phosphorus preparation.

The application discloses a method for counting a small amount of brine shrimps by using a diaphragm vacuum pump and a microporous filter film, and comprises the following steps: placing the microporous filter film above a filter head of the diaphragm vacuum pump, pouring hatching liquid into a filter cup of the diaphragm vacuum pump for filtration, and filtering the hatched brine shrimps on the microporous filter film by using the diaphragm vacuum pump, so that the hatched brine shrimp larvae and empty shells can be clearly distinguished on the microporous filter film, and the brine shrimps can be accurately counted under naked eyes or a dissecting microscope. The method greatly reduces the loss of the number of brine shrimps in the process of hatching the brine shrimps in a laboratory, reduces experimental data errors, more accurately completes counting, greatly improves the counting accuracy, and obtains more accurate hatching rates of brine shrimp eggs. The method is simple in steps and easy to operate, provides a better method for accurately calculating the hatching rate of the brine shrimps, and lays an important foundation for experiments related to the brine shrimps.

The invention belongs to the technical field of plant exosomes, and particularly discloses a phellinus igniarius exosome as well as a preparation method and application thereof. The preparation method of the phellinus igniarius exosome comprises the following steps: (1) activating a strain; (2) seed culture; (3) fermentation culture: transferring the phellinus igniarius seed solution into a fermentation culture medium for culture to obtain phellinus igniarius fermentation liquor; and (4) extraction: carrying out coarse filtration, primary centrifugation, primary microporous filtration, secondary microporous filtration, secondary centrifugation, resuspension and tertiary centrifugation on the phellinus igniarius fermentation liquor, and collecting to obtain the phellinus igniarius exosome. According to the preparation method of the phellinus igniarius exosome, a specific fermentation method and a specific extraction method are combined, an efficient and easy-to-operate way for obtaining the bacterial-derived exosome is provided, the yield, purity and efficacy of the obtained exosome can be ensured to be stable, and the phellinus igniarius exosome is suitable for large-scale production.

The utility model relates to filter machine technical field, and disclose a kind of doublet micropore filter, including two filter drums, still including cover, slag scraping structure and surround cylinder, the cover is detachably arranged at the top end of filter drum, and retractable structure is equipped between the cover and filter drum, the slag scraping structure includes rotating part and slag scraping piece, the rotating part is used to drive slag scraping piece rotation, to scrape the inner wall of filter core in filter drum, the surround cylinder is arranged in filter drum, and the outer circumference and bottom end of surround cylinder are equipped with leakage hole;The utility model can drive connecting shaft rotation using motor when filtering, in other words, can drive arc-shaped scraper to scrape the impurities attached to filter core inner wall, through this timely and automatic scraping cleaning action, filter core can keep relatively clean state at any time, greatly improve the filter effect of filter core continuity, ensure that the precision and flux of filtration work are not affected by the negative influence of impurity accumulation.

The utility model provides a 12-row reagent card used for being matched with a 96-pore plate solid-phase extraction device. The 12-row reagent card comprises a reagent card body, a microporous filtering membrane, a sealing cover, a supporting seat and a base, the microporous filtering membrane is arranged at the bottom of the reagent card body, an opening of the reagent card body is sealed by a sealing cover, and the reagent card body is mounted on the base through a supporting seat. Liquid-liquid extraction, the 96-pore plate and solid-phase extraction are effectively combined, the flux is high, liquid in 96 sample pores can be simultaneously filtered at one time, the problems of low filtering efficiency and high cost in the prior art are fundamentally solved, the operations of repeated suction, centrifugation, pipetting and the like in the traditional method are avoided, and the experimental steps are further simplified.

The application discloses carbon quantum dots for plant oomycete diseases and a preparation method and application thereof, and belongs to the technical field of nanometer material preparation. The preparation method comprises the following steps: dissolving salicylic acid, urea and copper chloride dihydrate in purified water, adjusting the pH value to 10-12, stirring to completely dissolve, and obtaining a mixed solution; transferring to a hydrothermal reaction kettle for reaction, cooling to room temperature, and obtaining carbon dots; centrifuging, collecting supernatant, filtering through a 0.22 mu m microporous filter membrane, dialyzing for 10-14 hours through a 1000 Da dialysis bag, and vacuum freeze-drying to obtain carbon quantum dot powder. The application discloses carbon quantum dots for plant oomycete diseases and a preparation method and application thereof, copper chloride is used as a dopant to dope heteroatoms to the carbon dots, so that a synergistic effect is generated between copper and the carbon dots, the antibacterial ability of the composite material is significantly enhanced, and the carbon quantum dots have high efficient antibacterial effect and excellent drug resistance.

The invention discloses a refining method for preparing high-purity natural benzaldehyde from bitter apricot kernel essential oil, and relates to the technical field of benzaldehyde refining, the bitter apricot kernel essential oil and a sodium propionate-acetic acid buffer solution with the pH value of 5.5 + / -0.2 are hydrolyzed for 30-35 min through an immobilized beta-glucosidase reactor at the flow rate of 0.8-1.2 mL / min and at the temperature of 40 + / -2 DEG C; directly introducing a reactor outlet product into a PDMS membrane permeation unit, and continuously separating benzaldehyde; cooling and condensing the permeation steam through a two-stage condenser, filtering the obtained liquid concentrate through a 0.2 mu m micropore, feeding the filtered liquid concentrate into a solid-phase adsorption column filled with molecular MIP, and eluting with ethanol and water; removing ethanol from the MIP eluent, introducing the MIP eluent into an SMB chromatographic system, and realizing continuous extraction of benzaldehyde with the purity of more than or equal to 99.5% and the yield of more than or equal to 85% by using a water-ethanol mobile phase. According to the method, the immobilized beta-glucosidase is combined with online degassing, so that online efficient hydrolysis of cyanoglycoside and safe degradation of cyanide are realized, the problems that thermal degradation is serious in traditional distillation and cyanide is difficult to remove in conventional extraction are solved, cyanide residues are effectively eliminated, and the product is safe and environment-friendly.

The invention discloses a method for removing CO after denitration and dust removal integration of lime kiln tail flue gas, and belongs to the technical field of CO removal of lime kiln flue gas. The method systematically solves the pain point of collaborative treatment of multiple pollutants in the lime kiln flue gas. According to the economical efficiency, a non-noble metal catalyst and equipment are integrated, and the investment and operation cost is reduced; reliability: ultra-microporous filtration and deep desulfurization guarantee long-acting operation of the catalyst (service life gt; 3 years); the method is environment-friendly, ammonia escape, NOx and CO synchronously reach the standard (actually measured NOx removal rate is larger than or equal to 98.5%, and CO removal rate is larger than or equal to 96.2%), and the ultralow emission requirement is met.

The invention discloses automatic detection equipment for liquid crystal display screen production, and relates to the technical field of display screen detection equipment, the automatic detection equipment comprises a support frame, a cleaning mechanism is arranged above the support frame, the cleaning mechanism comprises a filter box, the upper surface of the filter box is fixedly connected with the bottom surface of the support frame, and a microporous filter plate is clamped in the filter box. The right side face of the filter box is fixedly connected with two air suction pumps, and the air inlet ends of the two air suction pumps both penetrate through the filter box and extend to the position below the microporous filter plate. According to the automatic detection equipment for liquid crystal display screen production, fluff and other impurities carried on a liquid crystal display screen are removed in a static elimination and adsorption mode; the liquid crystal display screen does not need to be wiped and cleaned by alcohol before entering the detection equipment, so that the labor intensity of workers is reduced, meanwhile, fluff is prevented from being mistakenly judged as scratch defects of the liquid crystal display screen, and the defective product detection accuracy in the liquid crystal display screen detection process is improved.

The utility model discloses a positive electrode material microporous filtering device which comprises a filter, the top of the filter is connected with a discharging unit, the discharging unit is connected with a back flushing mechanism, the side wall of the filter is connected with a feeding unit, the bottom of the filter is connected with a three-way pipe, one end of the three-way pipe is connected with a regeneration pipe, and the other end of the three-way pipe is connected with a back flushing mechanism. A regeneration valve, a regeneration tank, a regeneration filter and a regeneration pump are sequentially connected to a pipe body of the regeneration pipe, the regeneration valve is arranged close to the three-way pipe, the end, away from the three-way pipe, of the regeneration pipe is connected with the back flushing mechanism, the other end of the three-way pipe is connected with a liquid drainage pipe, and a liquid drainage valve is connected to a pipe body of the liquid drainage pipe. According to the utility model, the filtered regenerated liquid is used for backwashing, so that the effective components in the discharged liquid can be fully utilized under the condition that the cleaning effect is not changed, and the consumption of the cleaning liquid is reduced.

The utility model belongs to the field of microporous filtering devices, and particularly relates to an environment-friendly microporous filtering device which comprises a tank body, a liquid outlet pipe is fixedly connected to the bottom of the tank body, a plugging mechanism is arranged on the liquid outlet pipe, a supporting plate is fixedly connected to the upper portion of the inner side of the tank body, and a microporous filtering element is arranged in the middle of the supporting plate in a penetrating mode. A motor is fixedly connected to the left side of the upper end of the supporting plate, an output shaft of the motor penetrates through the supporting plate and is connected with the supporting plate through a bearing, and a rotating shaft is fixedly connected to the tail end of the output shaft. According to the utility model, the backwashing mechanism consisting of the liquid inlet pipe, the sealing sleeve, the hollow ring, the connecting pipe, the backwashing pipe with the nozzle and the like is arranged inside the tank body and on the outer side of the microporous filter element, and the backwashing mechanism can rotate through the transmission between the motor and the gear, so that the microporous filter element can be subjected to backwashing; therefore, the microporous filter element is prevented from being blocked.

The invention relates to the technical field of microporous filtering membranes, in particular to a polytetrafluoroethylene-based microporous filtering membrane production control system, which comprises an acquisition module, an adjustment module, a correction module, an updating module and an early warning module. According to the method, the non-uniformity of the base band is actively compensated by adjusting the stretching rate, the calendering deviation is pre-corrected before longitudinal extension, then the quality deviation degree is introduced to correct the transverse stretching heating power, and the power correction coefficient and the mixing proportion are reversely optimized through threshold comparison of the adjustment index and the correction index and stability analysis. According to the method, closed-loop setting from back-end performance expression to front-end formula parameters is achieved, grading early warning is triggered based on the double-index deviation degree, and the problems that due to open-loop decoupling of process parameters and lack of feed-forward self-adaptive adjustment, the uniformity of the micropore structure of a finished filter membrane is poor, the air permeability fluctuation is large, and the large-scale production yield is difficult to guarantee are effectively solved.

The invention relates to the technical field of protein production, and discloses an anti-stress protein production device which comprises a tank body, a plasma mechanism is arranged outside the tank body, a stirring mechanism is arranged above the tank body, and a heating mechanism is arranged outside the tank body; the plasma mechanism comprises an air inlet cover, the right side face of the air inlet cover penetrates into the tank body, two microporous filter plates are clamped in the air inlet cover, the bottom face of the air inlet cover fixedly communicates with a connecting frame, an anode and a cathode are fixedly embedded in the inner side wall of the connecting frame, and an air pump is arranged below the connecting frame. According to the anti-stress protein production device, the nano-scale synergistic effect of plasma is utilized, the chelating and enriching efficiency of organic microelements is improved, an ionic amino acid solution is formed in the tank body, the hydrolysis efficiency of the anti-stress protein production device is effectively improved, the animal viscera hydrolysis period of the protein production device is shortened, and the production efficiency of the protein production device is improved. The effect of improving the protein amino acid production efficiency of the anti-stress protein production device is achieved.

The device comprises a sample bottle, a collection assembly, a microporous filtration assembly, a carbon dioxide collection bottle, a gas-guide tube, at least one absorption tube and a vacuum pump connected to the downstream of the tail end absorption tube which are connected in sequence, and each bottle body and the pipeline form a closed gas path capable of keeping a pressure reduction state during use. In the working state of the vacuum pump, the to-be-detected carbon dioxide aerial fog cosmetic stably passes through the microporous filtering assembly through the collecting assembly under the action of negative pressure and then is efficiently collected into the carbon dioxide collecting bottle; under the action of the heating device, carbon dioxide in the liquid is released, enters the absorption pipe through the gas guide pipe and fully reacts with the absorption liquid to generate precipitates. The device is simple in structure and relatively low in cost, can realize effective solid-liquid separation of a sample and quantitative transfer of carbon dioxide under a decompression condition, reduces impurities and leakage interference, and remarkably improves the accuracy, repeatability and applicability of detection of the content of carbon dioxide in carbonic acid cosmetics.

This invention relates to the preparation and application of carbon dot-functionalized lanthanide metal-organic framework materials for the detection of permanganate ions in water: S1, selecting raw materials: europium nitrate, trimesic acid, and grapefruit peel; S2, dissolving trimesic acid in anhydrous ethanol and stirring; S3, adding europium nitrate solution to the solution obtained in S2 and stirring; S4, allowing to stand, centrifuging to collect the white precipitate, washing and drying to obtain a white lanthanide metal-organic framework material; S5, drying and crushing grapefruit peel, adding deionized water, and transferring to a high-pressure reactor for reaction; S6, centrifuging the solution obtained in S5, taking the supernatant and filtering it through a microporous membrane; S7, dialysis purification of the solution obtained in S6 to obtain a pale yellow carbon dot solution; S8, mixing the carbon dot solution obtained in S7 with the lanthanide metal-organic framework material in S4 to obtain a carbon dot-functionalized lanthanide metal-organic framework material; S9, using the material obtained in S8 for the detection of permanganate ions in water.

The invention discloses a calcium ion content dynamic detection method based on a desulfurization gypsum dissolution experiment. The method comprises the following steps: establishing a standard working curve of calcium ion concentration and absorbance value in advance; building an online detection system consisting of a reaction container, a microporous filter head, a precise peristaltic pump, a dynamic mixer and a flow-type detection pool; the method comprises the following steps: continuously pumping out clear liquid in a reaction container by using a precision peristaltic pump in a desulfurization gypsum dissolving process, mixing the clear liquid with a mixed color developing reagent on line, and enabling the mixed liquid to flow into a flow-type detection pool of an ultraviolet and visible spectrophotometer for real-time dual-wavelength absorbance detection; and finally, converting the absorbance value subjected to background correction into calcium ion concentration through a standard working curve, and drawing a dissolution kinetics curve. According to the method, in-situ, continuous and high-precision monitoring of the calcium ion concentration in the desulfurization gypsum dissolving process is achieved, and the defects that a traditional interruption sampling method is tedious in operation, large in system disturbance and poor in anti-interference capacity are overcome.

The invention provides a multi-layer micropore combined type sample filtering device, and relates to the field of pesticide residue analysis and detection, the multi-layer micropore combined type sample filtering device comprises an upper shell, a lower shell, an automatic sweeping mechanism, a rapid limiting assembly and a door control switch, the bottom of the upper shell is connected with the lower shell through a bolt; three layers of microporous filtering pieces are uniformly mounted in the lower shell; an interception filter screen is mounted in the upper shell and located above the microporous filter piece, and an automatic sweeping mechanism is arranged at the position, located at the upper portion of the interception filter screen, in the upper shell. The intercepting filter screen is arranged above the microporous filter membrane, so that large-particle impurities in a sample to be detected are prevented from directly impacting the microporous filter membrane; meanwhile, the automatic sweeping mechanism is utilized to sweep large-particle impurities intercepted on the upper surface of the intercepting filter screen to the rear upper part into the impurity collecting box, so that the automatic sweeping operation on the upper surface of the intercepting filter screen is realized, the impurities are prevented from covering and blocking filter holes in the intercepting filter screen, and the efficient treatment requirement on a large batch of samples is met.

The application provides a method for preparing battery-grade lithium carbonate by shortening carbonization, comprising the following steps: preparing a lithium hydroxide solution, adding a surfactant, filtering through a microporous filter to obtain a refined lithium hydroxide solution; introducing industrial-grade carbon dioxide into the refined lithium hydroxide solution at a certain gas flow rate, performing a carbonization reaction, then performing solid-liquid separation and washing to obtain a carbonized solution and a wet residue, and drying and crushing the wet residue to obtain battery-grade lithium carbonate. The method can improve the carbonization efficiency and the utilization rate of carbon dioxide, and has the advantages of short process, simple operation, low cost, green environmental protection and the like, and is helpful to cope with the situation that the demand for battery-grade lithium carbonate is greater than that for battery-grade lithium hydroxide, and has considerable industrial application prospect.

The invention belongs to the technical field of heating equipment, and particularly relates to novel graphene electric heating equipment which comprises a heating equipment body, mounting mechanisms located on the left side and the right side of the interior of the heating equipment body and collecting mechanisms located in the mounting mechanisms. A filter screen is fixedly connected to the upper portion of the interior of the supporting frame, a cleaning brush is in contact with the right side of the top of the filter screen, a lead screw sleeve block is fixedly connected to the top of the cleaning brush, and a supporting lead screw is in threaded connection with the interior of the lead screw sleeve block. Mounting clamping plates on the two sides are controlled to get close to each other through a hydraulic oil cylinder, mounting blocks are clamped and fixed, fixed mounting of a supporting frame is achieved, a cleaning brush is controlled by a second motor to transversely move, dust in meshes of a filter screen is brushed into a collecting frame, and collecting and cleaning are conducted; the problem that dust of heating equipment can be caked and accumulated to block filter holes of a microporous filter plate is solved.