287results about How to "Reduce filter time" patented technology

The invention discloses a full-automatic nucleic acid extraction machine which comprises a machine body, a workbench, a swing mechanism, a suction-injection gun head, a pressurization gun, a transmission mechanism and a controller, wherein the machine body at least comprises a rack; a test tube placing hole position, a suction nozzle placing hole position, a filter hole position, a cracking hole position, a finished product collection hole position and a waste suction nozzle recycling slot are formed in the workbench; the swing mechanism is used for driving the workbench to reciprocate relative to the rack; an opening at the upper end part of the suction-injection gun head is connected with an injection pump, and the lower end part is matched with a suction nozzle; an opening at the upper end part of the pressurization gun is communicated with a pressurization device, and an air outlet is formed in the lower end part; the transmission mechanism is used for driving the suction-injection gun head and the pressurization gun to move along the length direction and height direction of the machine body; and the controller is used for controlling the transmission mechanism and the swing mechanism. The nucleic acid extraction machine disclosed by the invention can realize automatic suction and injection of samples and reagents, thus improving the working efficiency; and moreover, during filtration, positive pressure is applied to a filtering tubular column by the pressurization gun, the filtering time is shortened, and the nucleic acid extraction efficiency is further improved.

A regeneration device of an exhaust gas purification filter that reduces the regeneration time of the filter. The regeneration device includes a plurality of first temperature detectors (26a, 26b) arranged in casings to detect the temperature in each casing and a second temperature detector (26a, 26b) for detecting the temperature of the exhaust gas. A processor (30) is connected to the first temperature detectors and the second temperature detector. The processor compares the temperature of the exhaust gas and the temperature of at least one of the casings, opens the associated switch valve based on the comparison result, and preheats at least one of the filters with the exhaust gas. The heat of the exhaust gas suddenly increases the temperature of the filter from the initial temperature and reduces the filter regeneration time.

A crystalline form of crystalline (R)-3-(4-(2-(2-methyltetrazol-5-yl)-pyridin-5-yl)-3-fluorophenyl)-5-hydroxymethyl oxazolidin-2-one dihydrogen phosphate, methods of making the crystalline form and pharmaceutical compositions comprising the crystalline form are useful antibiotics. Further, the derivatives of the present invention may exert potent antibacterial activity versus various human and animal pathogens, including Gram-positive bacteria such as Staphylococi, Enterococci and Streptococi, anaerobic microorganisms such as Bacteroides and Clostridia, and acid-resistant microorganisms such as Mycobacterium tuberculosis and Mycobacterium avium. Accordingly, the compositions comprising the crystalline form may be used in antibiotics.

The invention discloses a preparation method for coatings of medical supplies. The preparation method includes a first step of placing the medical supplies into a reaction cavity, and carrying out vacuum treatment on the reaction cavity, a second step of pressing at least two types of precursors into the reaction cavity in sequence in a pulse alternating mode, enabling the pressed precursors to carry out reaction and absorption on the surfaces or the inner walls of the medical supplies, sucking out the redundant precursors and reaction accessory substances, and a third step of repeating the second step until that coatings with needed thickness are deposited on the surfaces or the inner walls of the medical supplies. The invention further discloses the novel medical supplies manufactured through the preparation method. The preparation method can be used for preparing the coatings which are even in thickness, good in biocompatibility, antimicrobial, antiallergic, corrosion resisting, non-toxic, insulated or conductive, fully coated or partially coated, and smooth on the surfaces or the inner walls of any kinds of medical supplies.

An oxidizing catalyst for preparing 4-hydroxy-3-methoxyphenyl formaldehyde or 4-hydroxy-3-ethoxyphenyl acetaldehyde from acetaldehyde by acid method contains Mg (0-0.3 mole%), Mo (0-0.02), Fe (0.03-0.3), Cu (0.004-0.04), Zn (0.002-0.07), Al (0-0.7), K (0.009-0.4), Na (0-0.03), O (0.1-3.0) and S (0.05-0.9). Its preparing process includes such steps as proportionally mixing aluminium oxide and / or iron oxide with the Na salt of Mo and sulfate of other metallic elements, and ball grinding. Its advantage is high output rate of products.

A process for preparing hollow staples from regenerated polyester includes such steps as washing waste polyester, pulverizing, drying, fusing extruding, prefiltering, pump metering, module filtering, spinning by hollow spinnerette, cooling in circulating wind, drawing, winding, bundling, stretching in oil bath and then in over-heat steam, crimping, thermal shape fixing, cutting short, and packing. Its advantage is high P / C ratio.

The invention discloses a refining method for long-chain binary acid. The refining method comprises the steps of: performing pretreatments including demulsifying, filtering and decoloring on fermentation liquor, then, reacting the pretreated fermentation liquor with dilute sulphuric acid through a microchannel reactor, heating an obtained mixture by using a sleeve to remove fine crystals, introducing crystal mush into a crystallization kettle for curing, controlling the growing speed and the size of crystals by means of gradient temperature to form crystals with uniform particle size, filtering, washing and drying to obtain long-chain binary acid crystals. The long-chain binary acid crystals have the advantages of uniform particles, low content of protein and impurities, high product purity, good color, and capability of meeting requirements on quality of polymerization-level products.

The invention discloses a circulating filtration system for sewage treatment. The circulating filtration system comprises a shell, a rotary drum rotatably arranged on the shell around its own axis, aplurality of filter screen plates circumferentially arranged at intervals on the outer circle of the rotary drum, and a cleaning device for cleaning the filter screen plates, wherein the axis of the rotary drum is horizontally arranged and the filter screen plates are arranged in the radial direction of the rotary drum; water to be treated flows from top to bottom and passes through the filter screen plate rotated to the left side of the rotary drum to realize filtration; and filtered impurities are attached to the filter screen plates and rotated to the right side of the rotary drum to be cleaned by the cleaning device arranged on the right side, and a drainage channel for collecting and discharging clear water and an impurity discharging channel for collecting and discharging cleaned impurities are arranged below the rotary drum from left to right. The circulating filtration system can improve the sewage pretreatment efficiency, has a simple structure, a high automation degree, and alow equipment cost and is beneficial to popularization.

The invention discloses a method for preparing a blueberry juice beverage with a high anthocyanin content. The method comprises using frozen or fresh blueberry as raw materials, selecting, cleaning, adding citric acid and some pure water and smashing in an ultrafine way to get the smashed blueberry juice, filtering by using a ceramic ultrafiltration membrane to degerming at a low temperature, and then homogenizing, degassing and filling to get the finished product of the blueberry juice. The method is advantageous by greatly increasing the content and a transfer rate of the anthocyanin in the blueberry juice, preventing denaturation of anthocyanin caused by high-temperature disinfection, the denaturation causing an acerb taste, stabilizing the beverage by adding mycose and a small amount of pectin finally, reducing stability of the anthocyanin in the beverage, and improving mouthfeel of the beverage. The method is simple, and the juice is good in mouthfeel and relatively high in nutritional value.

A catalytic cracking oil slurry pretreatment system and a pretreatment method by the utilization of the system are disclosed. The invention relates to the field of comprehensive utilization of catalytic cracking oil slurry, specifically to a catalytic cracking oil slurry pretreatment device, a system thereof and a pretreatment method. The invention aims to solve the problem of low efficiency during the process of catalytic cracking oil slurry pretreatment. The system comprises a solvent tank, a catalytic cracking oil slurry tank, a mixer, an ultrasonic centrifuge device, an ultrasound-assisted microwave-enhanced supercritical extraction device, a separator, a solid particle gathering tank, a heavy components collector and a light components collector. Through a raw material mixing unit, a solid-liquid separation unit, a solvent extraction unit, a components separation unit and a solvent recovery unit, catalyst granules and oil slurry are separated, and separation of light and heavy components of oils and precision cutting extraction are realized. The method has advantages of simple process equipment and good separation effect.

The invention provides a flatness calibration method and system. The method comprises the following steps of acquiring a frequency domain characteristic measurement data linear value of a radio frequency channel; fitting to obtain a frequency domain response of the total bandwidth according to the frequency domain characteristic measurement data linear value of the radio frequency channel; determining a frequency domain response of a filter according to the frequency domain response of the total bandwidth; calculating a time domain coefficient of the filter according to the frequency domain response of the filter; intercepting data from the time domain coefficient of the filter according to the coefficient length of the filter, and determining the data obtained through interception as a coefficient of the filter; and configuring the filter according to the coefficient of the filter in order to carry out flatness calibration on the data acquired by an analog-digital converter. Accordingto the method and the system, the problems of poor flexibility, large workload and high running load in the existing flatness calibration scheme are solved.

The invention discloses a recruitment and application matching method. Compared with the existing character and word group matching method in the industry, the recruitment and application matching method can convert word groups into background big data precisely, and provides an automatic matching function with excellent precision for positions and resumes through adopting a data-data matching method, greatly shortens the time for filtering resumes of a recruiter; meanwhile, the recruitment and application matching method can further help a job seeker to create a resume by using professional language through providing detailed content tags, or automatically generates a resume according to the tags selected by the job seeker, thereby greatly saving time cost of the job seeker, and improving the success rate of application.

The present invention discloses a preparation device of a fructus hippophae juice. The preparation method comprises a squeezing device, a horizontal screw centrifuging device, a concentrating device and a filling device. A material outlet of the squeezing machine is connected with a material inlet of the horizontal screw centrifuging machine; a material inlet of the concentrating device is located at the lower part of a liquid collecting box of the horizontal screw centrifuging machine and a material inlet of the filling device is connected to a material outlet of the concentrating device; and the horizontal screw device comprises a horizontal screw main body, a rotary drum and a screw inside, a material feeding tube with a material inlet, a speed reduction motor, a liquid collection tank, and a residue discharge port and a pressure sensor arranged on the residue discharge port used for controlling the outflow of the residues. The device can effectively remove pectin and fibers in the fructus hippophae juice and realizes the automatic production of the fructus hippophae juice.

The invention provides a single image defogging method based on improved non-local prior and a medium, and belongs to the technical field of computer vision and the technical field of image processing. The single image defogging method comprises the following steps: firstly, carrying out atmospheric light estimation by using an improved dark channel prior method, and then processing the whole image by using non-local prior to estimate the initial transmissivity, wherein global information is considered in non-local prior, and the image does not need to be segmented into different blocks, so that the phenomenon of wheel halo can be avoided; secondly, refining the scene transmissivity by adopting context regularization based on a weighted L1 norm to obtain refined scene transmissivity; and finally, correcting the transmissivity by using domain transformation filtering. Evaluation indexes such as peak signal-to-noise ratio, visible edge number, average gradient, saturated pixel point number and the like are improved.

The invention discloses a method for calibrating an inner lever arm of an accelerometer of a fiber-optic gyroscope strapdown inertial navigation system. The method comprises the following steps: putting fiber-optic gyroscope inertial navigation equipment on a rotary table, and finishing initial configuration of the rotary table; testing whether a cable is communicated or not, and ensuring normal data transmission; finishing initial alignment and discrete calibration experiment of the system to obtain static error parameter values of a gyroscope and an accelerometer; enabling the rotary table to move according to the calibration path design manner; finishing calibration experiment of the inner lever arm through data collection of the gyroscope and the accelerometer; processing the data which is obtained by the inner lever arm calibration experiment; building a kalman filter by employing a linear velocity error of the system as observed quantity; selecting a proper filtering initial value; and carrying out kalman filtering on the system according to a fundamental equation of kalman filtering, so as to obtain a convergent inner lever arm parameter value. According to the method disclosed by the invention, the kalman filtering time is greatly shortened; the efficiency is improved and the method has high practicability.

The invention discloses a method for extracting and purifying Mallotus nepalensis oil, which comprises the following steps: (1) squeezing dried Mallotus nepalensis to obtain raw oil; (2) adding anhydrous ethanol to the squeezed Mallotus nepalensis raw oil, stirring to dissolve, filtering with activated carbon for decoloring and deodorizing; (3) standing the filtrate filtered by the activated carbon, layering, and separating the layered liquid: taking out the ethanol phase at the upper layer, and collecting the oil phase at the lower layer as initially purified Mallotus nepalensis oil; (4) adding ethanol to the Mallotus nepalensis oil, stirring, standing, and layering; (5) separating the solution after standing and layering: taking out the ethanol phase at the upper layer, and collecting the oil phase at the lower layer as purified Mallotus nepalensis oil; (6) adding purified water to the purified Mallotus nepalensis oil to remove residual ethanol, removing the ethanol water at the upper layer, and collecting the purified oil at the lower layer; and (7) performing vacuum extraction on the purified Mallotus nepalensis oil, and cooling to obtain Mallotus nepalensis oil finished product. The method disclosed by the invention is feasible and simple in operation, and adopts an extraction method to rapidly and simply deodorize, and the entire process adopts low-temperature treatment, and does not need heating.

The invention provides a method for preparing diglyceride through goose fat enzymolysis. According to the invention, fat is hydrolyzed with a chemical saponification method, such that diglyceride is prepared. According to the invention, during the diglyceride preparation process, a goose fat refining step and a vacuum pump filtration step are added, such that impurities can be removed, filtration time can be shortened, goose fat purity and extraction rate can be improved, and further diglyceride yield can be improved. Also, when the goose fat diglyceride is prepared with the enzymatic method, the process is carried out on the basis of fat hydrolysis, such that reaction is more sufficient, reaction time is shortened to a certain extent, and diglyceride yield can be improved. With the method provided by the invention, a blank in the field is filled, a novel method is provided for the preparation of goose fat diglyceride, and important economic and social value are provided.

The invention discloses a fermentation tank, an equipment system for preparing probiotics and a method for preparing probiotics. The motor of the fermentation tank is positioned under a tank body, and facilitates convenient tank opening cleaning as well as scale removing through magnetic stirring. The equipment system for preparing probiotics comprises the fermentation tank, a filtering device, afreeze-drying device, a comminuter, and a stirrer. Specifically, the filtering device is added with a heat exchanger, employs a ceramic membrane prepared from an inorganic ceramic material by a special technology, and can reach the purposes of separation, concentration and purification by means of crossflow filtration and pressure driving during using; and the freeze-drying device consists of a cryogenic refrigerator and a freeze dryer, the temperature sensor of which is fixed on the sidewall of a material plate. During preparing probiotics, the material freezing step undergoes in the cryogenic refrigerator, and the material drying process undergoes in the freeze dryer, thus reducing energy consumption and improving production efficiency.

The invention discloses a making method of high-purity high-dispersing magnesium hydroxide flameproof agent, which comprises the following steps: allocating mother liquid with density at 0.5-3.0mol / L through bittern and acetone; adding ammonia to prepare slurry; filtering; washing; drying to obtain the product.

A beneficiation wastewater treating and recycling device comprises a bottom plate, a supporting plate, a frame device, a filtering device, a collecting device and an air cylinder device, wherein a first supporting rod, a second supporting rod, a first spring and a positioning ball are arranged on the bottom plate, the supporting plate is provided with a first through hole, a water outlet hopper, a first connecting rod, a shaking frame, a first filter screen, a second spring, a first box, a second filter screen, a third filter screen, a heat dissipation frame and a heating rod, the frame device comprises a frame, a feeding hopper, a fourth filter screen, a first pipeline, a first water pump, a first valve, a third supporting rod, a first transverse rod, a first oblique rod and a first roller, the filtering device comprises a fifth filter screen, a sixth filter screen, a first connecting line, a vibrator and a second connecting line, the collecting device comprises a second box, a guide block and a baffle, and the air cylinder device comprises a first support, an air cylinder, a push rod, a push plate and a positioning rod.The beneficiation wastewater treating and recycling device is capable of filtering beneficiation water thoroughly, remarkable in filtering effect and high in filtering efficiency.

The invention relates to an ertapenem intermediate crystal, as well as a preparation method and the application of the ertapenem intermediate crystal. The crystal has the characteristic values shown by diffraction angle of 2theta at the parts of 5.10+ / -0.20 degrees, 8.99+ / -0.20 degrees, 10.31+ / -0.20 degrees, 15.22+ / -0.20 degrees, 17.09+ / -0.20 degrees and 22.66+ / -0.20 degrees in X-ray powder diffraction pattern. The crystal compound shown in formula I is easy to separate, has good purity and stability and is suitable for industrial production and control.

The invention discloses a multi-channel pin type filter device which comprises an injector, a filter, a positioning slot plate and a sampling bottle base plate, wherein a positioning bracket and two rows of injector positioning slots are arranged on the positioning slot plate. 5 to 15 slots are arranged on each row of the injector positioning slots. The injector positioning slot is a U-shaped groove and the injector is grafted in the injector positioning slot. The positioning slot and at least two rows of sampling bottle bases corresponding to the positioning slot are arranged on the sampling bottle base plate. The positioning bracket is spliced with the positioning slot. The multi-channel pin type filter device of the invention can simultaneously filter various samples, saves time and labor for filtering and has high efficiency.

The invention relates to a full-automatic fatty acid value detection system and a detection method and belongs to the technical field of fatty acid value detection for cereals, such as corn, wheat, rice and the like, and products thereof. The system includes: a titration pretreatment unit, which is used for stirring a sample; a quantitative liquid adding unit, which is disposed on one end of a work bench, a titration analytic unit which is arranged on the other end of the work bench, and a transfer device which moves the sample from the quantitative liquid adding unit to the titration analyticunit. The titration pretreatment unit is connected to the quantitative liquid adding unit through a transfer pump and a pipeline. By means of the system, the sample is subjected to steps of reagent extraction, vibrating extraction, filtration, quantitative transfer, indicator addition, and diluent addition; then the sample is fed into the titration analytic unit and is analyzed in order to finally obtain a detection result. The detection system can achieve non-manual intervention in the detection process and can complete the whole treatment process on a plurality of samples in one time. The system is high in treatment speed, allows simultaneous treatment on a plurality of samples and allows continuous sample injection and titration analysis, and has good repeatability. The system and method achieve full-automation on fatty acid value detection.

A method for measuring the number of fine particles in ultrapure water includes subjecting the ultrapure water to internal pressure filtration through a hollow fiber membrane having a skin layer capable of trapping the fine particles in the ultrapure water at least on an inner surface thereof, exposing the inner surface of the hollow fiber membrane, and measuring the number of fine particles on the exposed inner surface.

The invention discloses a method for extracting riboflavin from riboflavin fermentation liquor. The method comprises the following steps that flocculation and filtration of the fermentation liquor areperformed, wherein the inactivated fermentation liquor is cooled, a flocculant solution is added and stirred, filtration is performed after flocculation is completed, and a filter cake is obtained; the filter cake is dehydrated, wherein a dehydration agent is added into the filter cake and is stirred and homogenized, and then filtration is performed to obtain the dehydrated filter cake; acid solution is performed, wherein stirring is performed for dissolution after a hydrochloric acid solution is added into the dehydrated filter cake, and an acid solution is obtained; membrane filtration is performed, wherein the acid solution enters a membrane filtration system, and microfiltration is performed to obtain filtrate; crystallization is performed, wherein air is introduced for stirring afterthe filtrate is heated, water is added for attenuation, stirring crystallization is performed, and filtration and drying are performed to obtain a riboflavin crystallization product. The yield and product content of the riboflavin extracted by adopting the method are high.

A filter for edible oil and fat designed to increase the useful life of oil and fat used for frying foodstuff and to improve the quality thereof, having reduced shape and dimensions, thus allowing to be immersed in the oil to be filtered, thus eliminating the time spent for removing and conveying the hot oil compared to the traditional filtering methods and making the process safer; the shorter time reducing the loss of heat, thus keeping the oil hot and the viscosity low and thus facilitating the passage thereof through filtering element.

The invention relates to a dihydrate azithromycin sphaerocrystal and a preparation method thereof. The sphaerocrystal is high in circular degree and large in particle size, has the diameter reaching to 0.5mm to 4mm, is good in fluidity, and has an angle of repose being 17 degrees to 23 degrees. The method comprises the steps of adding azithromycin solids into a mixed solvent of a good solvent anda bridging agent, then heating to 20 DEG C to 40 DEG C, fully dissolving the solids, adding water for crystallizing under the stirring action, after adding water, growing the grain for 30 to 90min atconstant temperature, then filtering a crystal mush, vacuum drying a filter cake at 50 to 60 DEG C to constant weight to obtain the dihydrate azithromycin sphaerocrystal. The particle size of the product is uniform, the particle size can reach 0.5 to 4mm, the angle of repose is 17 degrees to 23 degrees, and the fluidity is good. The dihydrate azithromycin sphaerocrystal provided by the invention is simple in process flow, has low requirement on equipment, is large in product particle size, high in purity and good in fluidity, can be directly used for tableting, and is easy to realize industrial production.

The invention relates to a preparation method of a natamycin laminar crystal, and the preparation method comprises the following steps: (1) adding natamycin mycelium into a methanol and water mixed liquid, wherein the volume ratio of methanol to water is (60-90):(40-10); (2) adjusting the pH value to 10-12 with a basic substance; (3) carrying out liquid-solid separation and collecting filtrate to obtain a natamycin extract; (4) concentrating the extract until the content of natamycin is 18-26 mg / mL, and flocculating to remove insoluble substances to obtain a natamycin fine extract; (5) acidifying the natamycin fine extract by two stages: firstly dripping acid slowly until the pH value decreases to 8-9, then stirring for more than 1 hour, then slowly dripping the acid until the pH value decreases to 6-7, and then stirring for more than 3 hours to obtain a crystallization liquid of the laminar natamycin crystal; and (6) carrying out liquid-solid separation and drying in vacuum to obtain the laminar natamycin crystal. By adoption of the preparation method provided by the invention, the uniform natamycin laminar crystal can be prepared, the subsequent crystal washing and drying difficulties are reduced, and the crystal filtering and drying time is shortened.