1301 results about "Filter paper" patented technology

The invention relates to a method for detecting pyridine in air, a test paper sheet is placed in an air environment to be detected, the color change of the test paper sheet is observed, the pyridine concentration is qualitatively judged or quantitatively judged according to the color change of the test paper sheet, and the test paper sheet is made of a filter paper sheet and a zinc-based organic-inorganic hybrid halide material. According to the method, qualitative or semi-quantitative judgment of the pyridine concentration in the air can be performed by adopting a test paper sheet and a color card or a linear correlation model standard curve graph, so that whether the pyridine content in the air exceeds the standard or not or the exceeding amplitude can be monitored, and the method has the advantages of convenience in operation and more convenience in detection.

The invention relates to the technical field of metal material sample preparation, in particular to a preparation method for extracting carbon replica of steel for a high-carbon wire rod. The method specifically comprises the following steps: S1, preparing a sample; s2, immersing the sample into a nitric acid alcohol solution; s3, placing the sample in a sample chamber of a high-vacuum coating instrument, evaporating a carbon film with the thickness of 10-20 nm on the surface of the sample, and taking out the sample after vacuum is relieved; s4, performing electrolytic film removal by adopting an electrolytic polishing corrosion instrument; s5, after the carbon film falls off, the nitric acid alcohol on the carbon film is cleaned until the absolute ethyl alcohol in the weighing bottle is colorless; s6, the carbon film is transferred into deionized water, after the carbon film is fully unfolded, the carbon film is fished up through a transmission electron microscope and a copper net and placed on filter paper, and the carbon film is tightly attached to the copper net; and S7, baking the carbon film sample adhered to the copper mesh for 30-60 seconds, and placing the dried sample under an electron microscope for observation to complete the preparation of the steel extraction carbon replica sample for the high-carbon wire rod. The method has the advantages of high demolding speed, complete and firm carbon film form, simple configuration and low cost.

The invention discloses an ionic type rare earth ore body pressurization, permeation and shearing combined test device. The device comprises a shear box, a load system, a dynamic permeation structure, a graded filtration structure, a data assembly and a processing terminal, the load system is used for applying a horizontal load and a vertical load to the shear box; the dynamic permeation structure is used for containing a leaching solution and enabling the leaching solution to flow into the shear box; the graded filtration structure is used for collecting a leaching solution reacted with the rare earth ore body sample and acquiring graded filtration analysis data; the data assembly is used for summarizing monitoring data in the penetration and shearing processes; the processing terminal is used for controlling; the shear box comprises an upper box, a lower box, an upper seepage pressing plate, a lower seepage pressing plate, an upper filter screen plate, a lower filter screen plate, a cover plate, a microporous metal plate and filter paper. According to the invention, the integration of fine simulation and penetration and shear test of the in-situ ore leaching injection-production process is realized, and a test basis can be provided for in-situ ore leaching injection-production parameter design, rare earth ore body stability analysis and disaster risk assessment.

The invention relates to the technical field of suction filtration, and particularly discloses a negative pressure suction filtration device which comprises a base, a funnel and a suction filtration bottle which are distributed from top to bottom are arranged on the base, a filter paper alternation structure capable of replacing filter paper is arranged between the funnel and the suction filtration bottle, and the funnel and the filter paper alternation structure are detachably connected with each other. The filter paper alternation structure and the suction filtration bottle are detachably connected with each other; through a rotating disc and an intermittent driving mechanism of the filter paper alternating structure, the filter paper can be automatically replaced under the condition that the whole device is not disassembled, and the operation continuity and efficiency are greatly improved; the first elastic pressing structure and the second elastic pressing structure ensure that the lower abutting pipeline is tightly attached to the upper annular sliding groove and the upper abutting pipeline is tightly attached to the lower annular sliding groove through the elastic force of the spring, the sealing effect of the first sliding cover and the sealing effect of the second sliding cover are combined, liquid leakage under the condition that the filter paper is automatically replaced is effectively prevented, and it is guaranteed that the negative pressure environment is stable.

The invention discloses a dynamic paper feeding control method for double-probe aerosol monitoring, and relates to the field of environmental monitoring instrument manufacturing. The method comprises the following steps: acquiring a currently set paper feeding mode of the aerosol detection device, and performing paper feeding control on filter paper of the aerosol detection device according to a filter paper target displacement corresponding to the paper feeding mode; acquiring a corresponding real-time accumulated pulse number after the aerosol detection device starts paper feeding control, and stopping paper feeding when a paper feeding stopping condition is met; acquiring the perimeter of the positioning shaft and the number of pulses per circle; real-time displacement is determined according to the perimeter of the positioning shaft, the number of pulses in each circle and the number of real-time accumulated pulses; and correcting the real-time displacement according to the target displacement of the filter paper, and dynamically controlling the filter paper of the aerosol detection device again according to the corrected real-time displacement. According to the invention, actual transportation positioning of the filter paper in different paper feeding modes is considered and correction is carried out, so that huge deviation of the detection efficiency of the monitor and serious distortion of a measurement energy spectrum can be avoided.

The invention discloses an assembling device and method of a high-efficiency filter in the technical field of machining and assembling, and aims to solve the problems that in the prior art, the process of detaching and replacing filter paper of the high-efficiency filter by a customer is complicated, and the quality is easy to cause problems. The assembly line comprises an assembly line used for conveying folded filter paper, the assembly line is sequentially provided with a gluing assembly, a screen plate placing assembly, a side plate assembly assembly and a connecting strip assembly assembly from upstream to downstream, the upstream and the downstream of the assembly line are divided into a first section and a second section respectively, and the feeding width of the second section of the assembly line is smaller than the length of the filter paper; a jacking conveying line is further arranged on the side of the upstream position of the second section of the assembly line, and a second conveying line is further arranged on the side of the downstream position of the second section of the assembly line. The invention is used for providing a new filter paper assembly mode, so that the efficient filter equipment of a customer can be efficiently replaced according to the customer demand, the manual operation error can be reduced while the assembly efficiency is guaranteed, and the assembly efficiency and quality are better.

The utility model discloses an air filter element which comprises an inner framework, an outer framework, filter paper, an upper end cover and a lower end cover, the outer framework is V-shaped, and an opening structure is formed in the upper end position of the outer framework; the inner framework is arranged in the outer framework and is V-shaped, and an opening structure is also formed in the upper end position of the inner framework; the lower end position of the outer framework and the lower end position of the inner framework form a closed structure through the lower end cover; a closed structure is formed between the upper end position of the outer framework and the upper end position of the inner framework through the upper end cover; a through hole is formed in the upper end cover, and the through hole is communicated with the interior of the inner framework; the filter paper is laid between the outer framework and the inner framework to form a filtering surface. The performance of the air filtering system can be improved, so that a cleaner and healthier air environment is provided.

The invention relates to a variable-step-pitch radioactive aerosol filter paper taking mechanism and a detection device, the variable-step-pitch radioactive aerosol filter paper taking mechanism comprises a mounting bracket, a paper feeding auxiliary adjusting mechanism is arranged on one side of the mounting bracket, and a detection device body is arranged on one side of the mounting bracket; according to the device, the stepping motor is arranged to drive the winding action of the filter paper tape body, and the transmission shaft, the winding rod and the speed-adjustable control system are matched, so that the fine control of the sampling spacing is realized, and the device is suitable for the collection requirements of radioactive aerosols with different strengths or periods; the step pitch can be flexibly set according to actual working conditions, the use efficiency of filter paper is improved, the response capacity of a monitoring system to sudden radioactive events is enhanced, meanwhile, error accumulation is avoided through coordinated arrangement between the paper feeding mechanism and the detection device body, closed-loop control over the sampling and detection process is achieved, and the detection efficiency is improved. And the precision and the practicability of the whole device can be improved.

The invention discloses a paper feeding device and method for a radioactive aerosol activity monitor, and belongs to the technical field of nuclear radiation measuring instruments. The device comprises a paper feeding case and perforated filter paper; a paper feeding power assembly and a filter paper supporting assembly are arranged in the paper feeding case, and the paper feeding power assembly comprises a main motor and an auxiliary motor; the filter paper supporting assembly comprises a first filter paper shaft and a second filter paper shaft; a photoelectric switch is arranged on the second filter paper shaft; the method comprises the following steps: 1, mounting filter paper; 2, feeding filter paper; and 3, paper feeding detection. Through a dual-motor mode, the perforated filter paper is synchronously controlled to move, and the fault that the filter paper slips or is stacked under the condition that a driven shaft is loosened under the condition of a single motor, or the filter paper is broken due to the fact that the motor pulls the filter paper under the fastening condition is solved; the unstable factors that under the condition of a traditional single motor, the tightness degree of the driven shaft cannot guarantee the standard performance of adjustment every time due to manual non-standard adjustment and the driven shaft can be gradually loosened and needs to be adjusted again can be directly removed, and the operation stability of the whole device is guaranteed.

The application discloses a new device for pre-acidification process combined with cathode buffer zone electric dynamic remediation of heavy metal contaminated soil and a construction method, and belongs to the field of electric dynamic remediation of heavy metal contaminated soil. The device comprises a soil remediation chamber and a sewage treatment chamber. The soil remediation chamber is open at the top, is provided with an anode plate on one side, and is provided with a cathode plate on the opposite side. Filter paper is attached to the two sides of the anode plate and the cathode plate. The cathode plate is further provided with a cathode buffer chamber opposite the anode plate. The anode plate and the cathode plate are connected through wires, a power supply and a sensor. The soil remediation chamber is connected with the sewage treatment chamber on the side provided with the cathode plate, and a gap is formed between the soil remediation chamber and the sewage treatment chamber to allow liquid to flow from the soil remediation chamber into the sewage treatment chamber. The sewage treatment chamber is provided with adsorption material. The sewage treatment chamber is provided with a drainage hole and a drainage pipe at the bottom end. The method can effectively remove heavy metals in sewage and can avoid the possibility of secondary pollution of the environment caused by electric dynamic remediation of sewage.

The invention belongs to the technical field of air compressor accessories, and particularly relates to an air compressor oil filter which comprises a shell, filter paper is coaxially mounted in the shell, a rotary cover and an end cover are arranged at the two ends of the filter paper respectively, the air compressor oil filter further comprises a partition plate, and the partition plate is arranged at the position, close to the end cover, in the shell. A backwashing opening is formed in the center of the partition plate, a bypass opening is coaxially formed in the center of the end cover, a frustum is arranged in the center of the rotary cover, a sealing assembly capable of sealing the frustum and the bypass opening at the same time is movably installed in the shell, and an engine oil connector used for backwashing filter paper is connected to the end, away from the end cover, of the partition plate of the shell. Engine oil for backwashing the filter paper circularly flows between the interior of the shell and the engine oil connector; according to the invention, the normal use of the air compressor oil filter can be ensured by regularly backwashing the filter paper without disassembling the shell or replacing the filter paper, so that the service life of the air compressor oil filter is effectively prolonged.

A method for preparing baking soda from baking soda desulfurized fly ash comprises the following preparation steps: step 1, dissolving baking soda desulfurized fly ash in water to obtain a mixed solution A; 2, filtering the mixed solution A through microporous filter paper or a filter membrane to obtain supernate B; step 3, mixing and stirring the supernate B and a precipitant C for 1-5 hours to obtain a mixed solution D; step 4, filtering the mixed solution D through microporous filter paper or a filter membrane to obtain a supernatant E; step 5, adding 1-8% of a regulator F into the supernate E, and uniformly stirring to obtain liquid G; step 6, continuously adding aeration H into the liquid G, and adjusting the pH to be alkaline to obtain a solution J; 7, the solution J is heated, evaporated and crystallized, solid crystals are obtained and fully ground, and regenerated baking soda can be obtained; the preparation method is simple, the recovery rate of baking soda is high, and large-scale batch production can be carried out.

The invention discloses a dust-free environment purification method for biological pharmacy. Comprising the following steps: constructing three layers of metal filter screens, realizing particle interception through a conical micro-column array, an Al2O3 / TiO2 composite ceramic layer and a diamond-like carbon film, fixing lysozyme by adopting a crystal face regulated ZIF-8 crystal, and realizing dual inactivation of microorganisms by combining dielectric barrier discharge of a spiral plasma channel. The electrostatic adsorption HEPA filter paper adopts a BaTiO3-graphene quantum dot composite electret substrate, and a TiO2 / graphene heterojunction catalytic layer is decomposed by a Pt-Co bimetallic nanocluster and a photocatalysis-plasma-ozone-thermocatalysis quadruple oxidation system; and 0.1 mu m organic aerosol triggers graded reverse pulse cleaning based on differential pressure integration and a particle concentration threshold value, and the honeycomb flow guide structure drives a shutter and a gradient density sintering metal flow guide plate through piezoelectric ceramics to maintain laminar flow uniformity. According to the scheme, the limitation of a traditional technology is broken through, the purification efficiency of 0.1 micron particles is improved, and a high-stability solution is provided for a biopharmaceutical clean room.

The invention relates to a roller grinding cutting fluid impurity cleaning device which comprises a filtering box body provided with a liquid inlet and a liquid outlet, a magnetic attraction assembly is arranged in the filtering box body, a conveying mesh belt is arranged under the liquid outlet of the filtering box body, filtering paper is laid on the surface of the top of the conveying mesh belt, and the filtering paper is arranged in the filtering box body. And an oil collecting box body is arranged at the bottom of the conveying mesh belt, and a floating foam fishing assembly is arranged in the oil collecting box body. According to the impurity cleaning device for the cutting fluid for roller grinding, the cleanliness of the cutting fluid can be improved, the filtering capacity is high, the filtering efficiency is high, and the effect is good.

The invention discloses a method for preparing multifunctional oil-water separation paper through ZIF-67 in-situ growth on the surface of polydopamine coated fiber, and belongs to the technical field of preparation of fiber materials and composite materials thereof. The problems existing in an existing oil-water separation material preparation technology are solved. The method comprises the following steps: filter paper surface pretreatment; growing the MOF particles; and hydrophobic treatment. The product provided by the invention has self-cleaning and organic oil separation performances; the polydopamine and the silane with amino have rich amino, so that the polydopamine and the silane with amino have very high positive charge density during protonation, bacteria with negative charges can be attracted through electrostatic interaction, and the polydopamine and the ZIF-67 particles have a synergistic effect, so that the polydopamine and the ZIF-67 particles have an excellent inhibition effect on staphylococcus aureus. Oriented growth and controllability of MOF particles are achieved through loading of polydopamine on the surfaces of the fibers, and the super-hydrophobic paper is obtained; the method is simple, the process is easy to control, the cost is low, pollution is avoided, the oil-water separation performance is excellent, and the oil-water separation and antibacterial performance is achieved while the economic value of the filter paper is improved.

The present application relates to a system and method for measuring particulate matter emissions from vehicle tire wear under actual driving conditions. The measurement system includes: a sampling module connected to a main sampling tube equipped with a main flowmeter; a particulate matter quantity measurement module connected to the main sampling tube and used to measure the concentration of particles sampled from the main sampling tube and their sampling flow rate; a particulate matter mass sampling module connected to the main sampling tube and used to sample from the main sampling tube and collect particulate matter through filter paper; and a data processing module signal-connected to the particulate matter quantity measurement module and the particulate matter mass sampling module. The data processing module calculates the quantity and mass of particulate matter emissions from the vehicle's tire wear under actual driving conditions based on data measured by the particulate matter quantity measurement module, the main flowmeter, and filter paper weighing data. The present application can truly restore the working scene of the vehicle's tires under actual driving conditions, and the measured tire particulate matter emission results are highly accurate.

To provide a filter capable of reducing pressure loss at time of air passing.SOLUTION: A filter in which a metal-organic framework is supported on a substrate, wherein the filter that has undergone a specific pretreatment (a) and a water adsorption treatment (b) satisfies the following requirements (R1) and (R2) when air at high temperature and low humidity is passed through it at a predetermined airflow rate. Requirement (R1): Obtain graph P, where the horizontal axis represents time (seconds) and the vertical axis represents the cumulative amount of water desorbed per gram of filter (g), and graph Q, where the horizontal axis represents time (seconds) and the vertical axis represents the temperature (°C) of the air downstream of the filter, grasp the time t (seconds) at which the air temperature downstream of the filter reaches its lowest point T on graph Q, and the absolute value of the slope of the straight line connecting the point (t, P(t)) on graph P at time t and the origin is 9×10-4 or greater. Requirement (R2): The cumulative amount of water desorbed after 600 seconds is 0.133 g or more per gram of filter.SELECTED DRAWING: None

The invention discloses a preparation method and application of nano-enzyme molecularly imprinted detection particles, a molecularly imprinted material is developed on the basis of a FeN3P nano-enzyme material, the molecularly imprinted material is fixed on filter paper to realize high-sensitivity and high-selectivity detection of 25-(OH) D3, real-time field detection of the molecularly imprinted material is realized by matching with a self-researched mobile phone APP: Visual Method, and the nano-enzyme molecularly imprinted detection particles have very high practical application value. Accurate data support is provided for early warning and personalized intervention of osteoporosis, community screening and long-term health management lack of 25 (OH) D3 can be promoted, and the method has important scientific value and social significance in reduction of the incidence rate of osteoporosis and optimization of medical resource allocation.

The invention relates to the technical field of filter paper folding, one embodiment of the invention provides a filter paper folding device for air filter production, the filter paper folding device comprises a frame body and a paper folding mechanism, and further comprises a bearing plate, a baffle, a camera and a cutting mechanism, the bearing plate is fixedly connected to the frame body and used for bearing and conveying folded filter paper, and the baffle is fixedly connected to the frame body; the baffle is movably arranged on the bearing plate and used for blocking folded filter paper, the camera is installed on the bearing plate and used for shooting the number of the folded filter paper, the cutting mechanism is used for accurately cutting the folded filter paper, the cutting mechanism comprises a pressing plate and a cutter, the pressing plate is movably arranged on the bearing plate in a lifting mode, and the cutter is arranged on the pressing plate. A cutting cavity with the bottom open is formed in the pressing plate, and the cutter is movably arranged in the cutting cavity. By means of the technical scheme, the technical problem that in the prior art, when a conveying device stops running, filter paper needs to be cut, and the cutting efficiency is low is solved.

The invention discloses a method for detecting the content of carbon black in master batch, which comprises the following steps: S1) weighing the master batch with the mass G into a reaction tube, adding methanol, a cosolvent and a catalyst, sealing, and heating for alcoholysis; s2) taking out the reaction tube, cooling to room temperature, opening a cover, pouring a solution in the reaction tube into filter paper with the mass of W0, flushing the reaction tube with ethanol, pouring the solution into the filter paper to completely transfer the solution, flushing filter residues with hot absolute ethanol, and drying the filter paper with the filter residues, wherein the mass of the dried filter paper and the filter residues is W1; s3) putting the dried filter paper with the filter residues into a crucible with the mass of W2, ashing, transferring the crucible into a muffle furnace, calcining, and weighing the mass of the crucible and the ash content as W3 after the weight is constant; and S4) calculating the carbon black content in the master batch according to the following formula: omega = (W1-W0) / G * 100%-(W3-W2) / G * 100%. According to the method, ash content in the detection result is removed, the accuracy is high, the test repeatability is good, the operation is simple, and the energy consumption in the detection process is low.

The invention discloses an immunochromatography test strip based on a nano-robot as well as a preparation method and application thereof. The immunochromatography test strip comprises a bottom plate, and a sample pad, filter paper, a nitrocellulose membrane and absorbent paper which are sequentially overlapped and adhered to the bottom plate, when in use, an FPSN (at) Ab buffer solution is dropwise added on the surface of the sample pad; the FPSN (at) Ab buffer solution is prepared from Fe3O4 (at) mPDAamp; the preparation method comprises the following steps: preparing an mSiO2 (at) Nanozyme nano composite material and an antibody to be marked; the Fe3O4 (at) is mPDAamp; the mSiO2 (at) Nanozyme nano composite material is nano particles with an asymmetric structure, one end of the asymmetric structure is a core-shell structure, the core is Fe3O4, the shell is mesoporous polydopamine particles, the other end is rod-like mesoporous SiO2, and noble metal nano particles are loaded on the surfaces of Fe3O4 and mesoporous SiO2; according to the invention, the nano-robot is used as the probe to construct the immunochromatography test strip, so that the detection sensitivity and the detection speed of the test strip are improved, the binding efficiency between the probe and the to-be-detected object is optimized, and the problem that in the prior art, accurate detection of disease markers is difficult to realize under the conditions of small sample size and low concentration is solved.

The utility model discloses a radioactive aerosol filter paper box device which comprises a sealed air cavity, filter paper arranged in the sealed air cavity, a filter paper transmission assembly driving the filter paper to move, an air inlet pipeline arranged on the upper portion of the sealed air cavity and an air exhaust pipeline arranged on the lower portion of the sealed air cavity. The filter paper transmission assembly comprises a forward shaft and a reverse shaft which are rotationally arranged in the sealed air cavity, one end of filter paper is connected to the forward shaft, the other end of the filter paper is wound around the reverse shaft, a photoelectric switch is arranged below the filter paper, and a tensiometer is arranged on the lower side of the filter paper. The device is reasonable in structural design, the reverse shaft and the tensiometer are additionally arranged, when filter paper needs to be updated, the forward shaft rotates to drive the filter paper to be tightened, meanwhile, the tensiometer detects the tension of the filter paper, and then the reverse shaft rotates in a self-adaptive mode according to the measured tension; the problems of paper jamming, filter paper breaking, filter paper loosening and the like after long-time operation of a traditional filter paper box can be effectively solved, and long-time stable operation of the filter paper box device is guaranteed.

The invention provides a method for improving the performance of an MXene-based water evaporation power generation device, and belongs to the technical field of water evaporation power generation devices. The method comprises the following steps: mixing FeCl2. 4H2O, deionized water, ascorbic acid and ethylene glycol, and introducing N2 or Ar to obtain an etching solution; adding carbon nanotubes into the etching liquid, and adjusting the pH value to 4; adding MAX powder into the etching solution, and carrying out etching reaction and standing treatment to obtain supernate; centrifugally washing and drying the supernate to obtain a precipitate; preparing the precipitate into a solution, performing suction filtration on filter paper, and performing drying treatment to obtain an MXene / CNT / filter paper composite film; and connecting conductive parts to the upper and lower ends of the MXene / CNT / filter paper composite film to obtain the water evaporation power generation device. The CNT is synchronously assembled through in-situ hydroxyl radical acidification and etching, so that the CNT and the MXene film form chemical bonding, and the current and voltage of the device are effectively improved.

The utility model discloses a ship flue gas collector filtering device, the flue gas collector is used for collecting waste gas in a ship flue, the filtering device comprises a coarse filter arranged in a sampling gas path, the coarse filter can filter the collected flue waste gas, the coarse filter is used for filtering smoke dust and tar in the waste gas, and the coarse filter is used for filtering the smoke dust and tar in the waste gas. The filter paper provides a larger contact area so as to prolong the service life; and the filter paper can also be fixed between the filter element and the sampling port (airflow inlet) by utilizing elastic force generated by the wave shape.

The utility model provides a stem cell filtering and separating device. The stem cell filtering and separating device comprises a bottom cylinder and a cylinder cover, a filter cylinder is arranged in the bottom cylinder; filter paper is detachably placed on the inner side of the filter cartridge, the cartridge bottom of the filter cartridge is communicated with the top of the liquid storage cartridge, and a liquid discharge pipe is arranged at the bottom of the liquid storage cartridge; the liquid storage cylinder is connected with the upper part of the liquid storage connecting rod and is slidably connected with the bottom cylinder through the liquid storage connecting rod; the lower part of the liquid storage connecting rod is movably connected with one end of the lever plate in the length direction; the lever plate is hinged to the bottom cylinder, and the other end of the lever plate movably penetrates through the bottom cylinder and is movably connected with the bottom of the driving rod on the outer side of the bottom cylinder. One end of the cylinder cover is hinged to the bottom cylinder, the hinged position is arranged at the end where the driving rod is located, and the other end of the cylinder cover is detachably connected with the bottom cylinder. An annular water pipe is arranged on the inner side of the cylinder cover, and multiple nozzles are arranged on the inner side of the annular water pipe at intervals. According to the device, by changing the placing structure of the filter paper, an operator can better replace the filter paper and stem cell tissues, and the stem cell tissues can be protected while the stem cell filtering and separating effect is improved.

The invention relates to a tea filter paper pulp wastewater treatment device with a fiber collection function, in particular to the technical field of wastewater treatment devices. The technical problem that when flocculated wastewater flows from an air flotation area to a slag scraping area, solid impurities contained in the wastewater are easily influenced by water flow and are accumulated at the junction of the side wall of the air flotation area and the upper surface layer of the wastewater is solved. Comprising a shell, the side of the shell is fixedly connected with a flow guide plate, the shell is provided with a transmission device and a slag scraping mechanism arranged on the transmission device, the shell is fixedly connected with an electric push rod, the telescopic end of the electric push rod is fixedly connected with a fixed shell, the fixed shell is rotationally connected with a connecting rod, and the connecting rod is fixedly connected with a movable plate. According to the invention, scum accumulated at the junction of the guide plate and the wastewater liquid level is pushed to the position matched with the scum scraping mechanism through the moving plate, so that the comprehensiveness of the scum scraping mechanism in the process of cleaning the scum in the shell is ensured, and meanwhile, the scum cleaning effect of the scum scraping mechanism is enhanced.

The invention belongs to the technical field of sarcosine detection, and relates to an integrated sarcosine detection device as well as a preparation method, a detection method and application thereof. The device consists of a sample bottle and a double-layer paper chip, wherein the double-layer paper chip is fixed in a bottle cap of the sample bottle; the double-layer paper chip comprises a target recognition layer and a detection layer, the target recognition layer is Whatman 1 # filter paper loaded with SOx / HRP-coated MAF-7 biological composite materials, the detection layer is Whatman 1 # filter paper loaded with TMB color developing agents, and the layers are bonded through water-soluble double-faced adhesive tapes. After a sample is added into the sample bottle, the bottle is turned over, SOx can recognize and oxidize sarcosine to obtain H2O2, after the double-sided adhesive tape is fully reacted and dissolved, HRP oxidizes a substrate TMB in the presence of H2O2 to generate a bright blue product oxTMB, and RGB signals are recorded through a handheld colorimeter. The detection device can be used for quantitatively detecting the sarcosine content of the prostatic cancer marker.

The invention provides a water evaporation power generation device based on an MXene / filter paper composite film and a preparation method, and belongs to the technical field of water evaporation power generation. The preparation method comprises the following steps: adding FeCl2. 4H2O or FeSO4. 7H2O and ascorbic acid into a mixed solution of ethylene glycol and water, and stirring under a water bath condition to obtain an etching solution; slowly adding MAX powder into the etching solution, and carrying out magnetic stirring etching reaction to obtain a product solution; performing centrifugation, suction filtration and drying treatment on the product solution to obtain MXene solid powder; dissolving the solid powder in deionized water to form a solution, and carrying out suction filtration treatment on the solution on filter paper to obtain an MXene / filter paper composite film; the conductive parts are connected to the upper end and the lower end of the MXene / filter paper composite film, the water evaporation power generation device is obtained, the MXene stripping process is simple, the subsequent complex treatment process is not needed, and strong acid and virulent chemicals are not contained.

The preparation method comprises the following steps: according to an Fmoc solid-phase synthesis method, adopting Sieber resin as a solid-phase synthesis carrier, and sequentially coupling to obtain full-protection peptide resin; cutting the fully-protected peptide resin by using a DCM solution of TFA with a volume fraction of 3-5%, filtering to remove waste resin, and concentrating the obtained filtrate into a viscous solid; and adding a cracking reagent into the viscous solid, carrying out cracking, adding an ether solvent after the cracking is finished, carrying out sedimentation, and filtering and drying a precipitate to obtain a crude product of the tilpotide. By adopting the method disclosed by the invention, the use amount of TFA can be reduced by 70%, the use amount of ether as a required settling solvent is also reduced by 90%, precipitated particles are easily filtered by using filter cloth or filter paper, the limitation of the volume of a settling kettle on cracking batches is solved, the problem of solid-liquid separation of settling liquid is solved, the production efficiency is greatly improved, and the production cost is reduced.

The invention provides a device and a method for accurately determining suspended matters in water, and relates to the technical field of water quality detection. The device for accurately measuring the suspended matters in the water comprises a bracket, a container, a glass funnel, a pear-shaped separating funnel and filter paper, the pear-shaped separating funnel is fixed on the bracket, is arranged above the glass funnel and is used for conveying liquid into the glass funnel; the glass funnel is arranged at a bottle opening of the container; the filter paper is arranged in the glass funnel; and a liquid outlet pipe orifice of the pear-shaped separating funnel extends into a position which is 1 / 2-2 / 3 of the height of the horn part of the glass funnel. The method for measuring the suspended matters in the water by adopting the device has the advantages that the filtering efficiency is improved, the measurement error is reduced, and the manpower and time are saved.