364results about How to "No residue" patented technology

The invention discloses a light guide plate film covering method, device and equipment, and the method comprises the steps: responding to the detected size, material and surface condition of a light guide plate, and judging whether the light guide plate meets a film covering standard or not; commanding the robot to grab the membrane material, accurately positioning the alignment operation of the light guide plate and the membrane material through a visual guidance system, and adjusting the fitting position; controlling the membrane material to be preliminarily attached to the light guide plate, and adjusting pressure and adsorption force in real time according to material characteristics; analyzing data of the visual detection system, commanding the intelligent fluid dynamics control device to process bubbles or wrinkles, and meanwhile, re-scanning the processed area to ensure that the defoaming effect is qualified; and controlling the curing time, the curing temperature or the UV light intensity according to the used curing mode. According to the technical scheme, the laminating quality is improved, and bubbles and flaws are reduced.

The invention discloses a satiety sugar-controlling fat-reducing composition and a preparation method and application thereof, the satiety sugar-controlling fat-reducing composition comprises hydrogel particles, a white kidney bean extract, a mulberry leaf extract, alpha-lipoic acid, L-carnitine, a lotus leaf extract, medium chain triglyceride, polyethylene glycol and sorbitol, and the composition is a tablet. The components are matched with one another to effectively adjust the leptin level, improve appetite, increase energy consumption, adjust the fat metabolism process, reduce fat accumulation, improve fat consumption, inhibit the activity of alpha-amylase, reduce the conversion of carbohydrates into fat, block heat and fat intake, promote gastrointestinal motility and enhance the immunity of the human body. The effects of remarkably reducing the fat content and the body weight are achieved.

The invention relates to a broad-spectrum bacteriostatic lactic acid bacteria postbiotic preparation, a preparation method and application to laying hens, the lactic acid bacteria postbiotic preparation comprises lactic acid bacteria thalli and fermentation products of the lactic acid bacteria thalli, and lactic acid bacteria comprise lactobacillus plantarum LP45 and bifidobacterium animalis BAL531. The feed additive is prepared from lactobacillus plantarum LP45 and bifidobacterium animalis BAL531 through mixed fermentation and low-temperature vacuum drying, pathogenic bacteria such as clostridium perfringens, escherichia coli and salmonella can be inhibited, the abundance of beneficial bacteria in the intestinal tracts of chicken flocks is improved, the state of excrement is improved, chicken necrotic enteritis and diarrhea are prevented and treated, the intestinal health of laying hens is improved, and the laying hens are prevented and cured. The digestion and absorption efficiency of the feed is improved, and the laying rate is increased.

The invention relates to a traditional Chinese medicine composition with functions of tonifying qi and nourishing blood for livestock. The traditional Chinese medicine composition comprises the following components in parts by weight: 10-30 parts of astragalus membranaceus, 10-40 parts of spina gleditsiae, 10-20 parts of angelica sinensis, 10-20 parts of codonopsis pilosula, 10-30 parts of uniflower swisscentaury root, 10-30 parts of ligusticum wallichii, 10-20 parts of cowherb seed, 10-20 parts of fruit of liquidambar formosana hance and 1-10 parts of iron sucrose. The traditional Chinese medicine composition is scientific and reasonable in component, free of toxic and side effects and medicine residue, convenient to take and low in cost, has the functions of tonifying qi and nourishing blood, stimulating the menstrual flow and prompting lactation, and is capable of effectively treating diseases of postpartum hypogalactia, breast milk stoppage and the like which are normal in livestock.

The invention provides polyacrylate alkali-soluble resin as well as a preparation method and application thereof. The polyacrylate alkali-soluble resin has a structure as shown in a general formula (VI). According to the polyacrylate alkali-soluble resin provided by the invention, the six-membered cyclic anhydride with a rigid structure is introduced into a main chain, and the characteristics of the rigid structure and ester groups of the cyclic anhydride are utilized, so that the etching resistance and the adhesion to a copper substrate can be effectively enhanced, and the problems of short circuit and open circuit in a circuit board manufacturing process are reduced; the photosensitive dry film prepared from the photosensitive resin composition has the advantages of excellent adhesive force, high resolution ratio, high film stripping speed and no large film residue residue.

The utility model relates to the technical field of conveying hoppers, and discloses a cement conveying hopper which comprises a cylinder, a conical barrel is fixedly arranged at the top end of the cylinder, a shielding mechanism is arranged on the upper portion of the conical barrel, and a discharging mechanism is arranged in the cylinder. Through cooperative use of a shielding plate, a fixed plate, an L-shaped column, a U-shaped plate, an electric push rod, a moving block, a sliding block, a sliding groove and a rotating column, the shielding plate rotates to be combined with the upper surface of a conical barrel, the conical barrel can be shielded when not used, it is avoided that cement in the conical barrel is dried and solidified due to direct sunlight from the outside, the use effect is good, and the shading effect is achieved; and by arranging the discharging mechanism, when a set of material leaking holes in the movable circular plate and a set of material leaking holes in the fixed circular plate are consistent in vertical position, the cement falls through the two sets of material leaking holes, then uniform discharging is achieved, and feeding blockage is avoided.

The invention provides a method for preparing pyroxasulfone through continuous oxidation by using a fixed bed catalyst, which comprises the following steps: respectively pumping a compound of formula I and hydrogen peroxide into a fixed bed catalyst reactor for reaction, and purifying the reaction liquid after the reaction is completed to obtain pyroxasulfone. The fixed bed catalyst reactor internally comprises a tungsten-containing catalyst loaded by a nano titanium silicalite molecular sieve, the mass content of the nano titanium silicalite molecular sieve is 25%-50%, and the mass content of the tungsten-containing catalyst is 50%-75%. The fixed bed catalyst reactor is used, the reuse efficiency is high, and the catalyst cost is greatly reduced. The amount of hydrogen peroxide used for oxidation is only the theoretically required amount, no hydrogen peroxide is left after the reaction, and the risk of the oxidation reaction is greatly reduced. The method is simple in purification treatment, high in reaction yield and low in three-waste yield.

The invention relates to the technical field of pressure-sensitive adhesives, in particular to a UV tackifying type pressure-sensitive adhesive, a supporting film and a preparation method of the UV tackifying type pressure-sensitive adhesive. A cross-linking agent with UV responsiveness is prepared, the cross-linking agent is compounded with a glue master batch to obtain a pressure-sensitive adhesive with a tackifying characteristic, the pressure-sensitive adhesive is coated on the surface of an optical-grade film according to a certain thickness, and a release film and a protective film are covered on the surface of the optical-grade film. Under the irradiation of UV light, a light-sensitive chemical structure in molecules of the cross-linking agent is broken, so that the cross-linking degree of the pressure-sensitive adhesive is reduced, then active groups providing adhesion characteristics in masterbatch are exposed on an adhesion interface, the adhesion of the support film is increased, the support film has relatively small viscosity during initial lamination, and the adhesion performance of the support film is improved. And the material waste caused by incapability of reworking and re-laminating under the poor sticking conditions such as bubble mixing and sticking position deviation in the laminating process is avoided.

The invention provides material mixing equipment for mineral insulated cable knob insulator processing, and belongs to the technical field of insulated cable knob insulator material mixing equipment.The material mixing equipment comprises a material mixing tank and further comprises a material mixing assembly and a rolling static electricity removing assembly; due to the design of the lantern-shaped stirring paddle, materials in the mixing tank can be more effectively stirred, and the mixing uniformity and no powder residue are ensured by combining the scraping effect of the scraping plate on the inner wall of the mixing tank and the upper side wall of the guide table; by means of the physical grinding effect of the grinding roller, caked powder balls can be ground, large particles or impurities in magnesium oxide powder can be effectively removed in cooperation with the screening function of the conical filter cylinder, meanwhile, static electricity in the powder can be efficiently removed through an electrostatic adsorption rod on the grinding roller, and potential safety hazards such as dust agglomeration and explosion caused by static electricity accumulation are prevented; the transmission shaft is subjected to multi-layer supporting design, so that jumping and shaking of the transmission shaft during high-speed rotation are effectively reduced, collision with the inner wall of the mixing tank is avoided, and the overall stability and safety of equipment are improved.

The invention provides a ralstonia solanacearum bacteriophage resistant to chemical pesticides and application thereof, and relates to the technical field of biological control. The Ralstonia solanacearum phage RSP35 is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number of the Ralstonia solanacearum phage RSP35 is CCTCC M 2024498. The bacteriophage has high tolerance to chemical pesticides and strong specificity, can be used for preparing a pharmaceutical preparation for preventing and / or treating bacterial wilt and a pharmaceutical composition for preventing and / or treating bacterial wilt, and provides a feasible scheme for preventing and treating bacterial wilt.

The invention discloses a lithium iron phosphate positive plate recovery method suitable for a decommissioned lithium ion power battery, which comprises the following steps: S1, safely disassembling the decommissioned lithium iron phosphate power battery to obtain a positive plate; s2, soaking the positive plate in an eluent at a constant temperature of 65-95 DEG C, taking out the current collector after an active substance is separated from the current collector, and filtering to obtain the active substance; s3, cleaning and drying the active substance and the current collector obtained in the step S2; the eluent is formed by dissolving an acidic chelating agent and a passivating agent in water, the acidic chelating agent comprises one or more of gluconic acid, nitrilotriacetic acid, ethylenediamine tetraacetic acid and pentetic acid, and the passivating agent is used as an additive and comprises one or more of sodium phytate, sodium acetate, sodium citrate, sodium oxalate and sodium phosphate. According to the invention, the retired lithium iron phosphate battery is recovered at low cost by using a low-energy-consumption, safer, green and environment-friendly efficient method, and a high-purity and more complete positive active material and current collector are obtained.

The invention provides a method for culturing beneficial algae by resource utilization of cyanobacterial blooms, which comprises the following steps: 1, obtaining cyanobacterial (microcystis) blooms, and concentrating the cyanobacterial (microcystis) blooms until the concentration of chlorophyll a is 80-150mg / L; 2, carrying out continuous hydrodynamic disturbance on the high-concentration cyanobacterial bloom, wherein the disturbance intensity is suitable for preventing the cyanobacterial bloom from blackening and stinking; 3, continuously disturbing for 20-60 days to obtain cyanobacterial bloom which turns light yellow green or white; 4, tap water is used for diluting cyanobacterial blooms with changing colors, the concentration during dilution is 0.5-2.3 mL / cm < 2 >, and beneficial algae such as diatom and green algae are inoculated for culture under the conditions of normal temperature and weak light; and 5, when the culture is performed for 12-30 days, the growth density of the beneficial algae reaches the highest peak, and the cell density of the beneficial algae can reach up to 2.5 * 10 < 6 >-5.6 * 10 < 7 > cells / cm < 2 >. According to the method, algal toxin can be removed, beneficial algae such as diatom and green algae can be cultured through resource utilization of the cyanobacterial bloom, and a new way is provided for control and resource utilization of the cyanobacterial bloom.

The invention relates to the related technical field of waste recovery, in particular to equipment and method for producing aggregate from construction waste, and the equipment comprises a lower frame, an upper frame, a primary crushing module, a transition module, a suction module, a secondary crushing module, a separation module and a discharging module. Construction waste is preliminarily crushed through the jaw crusher, part of metal parts are separated from the construction waste, then the action that a magnetic suction plate stably descends firstly and then rotates and obliquely descends is achieved through an electromagnet in cooperation with an overturning assembly, the metal parts are gradually pulled downwards, and the separation efficiency is improved; the secondary crushing module is used for further crushing the semi-finished aggregate to form finished aggregate, meanwhile, the metal parts and the aggregate are separated through the separating screen drum and the telescopic comb teeth, and the metal parts are separated synchronously in the crushing process, so that the metal parts are prevented from entering the subsequent processing link, the equipment is effectively protected from being damaged, and the quality of the aggregate is improved.

The invention relates to the technical field of solid waste recovery, and provides a method for efficiently, simply and conveniently recovering asphalt based on a small amount of asphalt mixture, which comprises the following steps: S1, taking an asphalt mixture sample, adding water, and carrying out ultrasonic cleaning to remove impurities on the surface of the sample; s2, putting the impurity-removed and dried sample into a mixed solvent, and soaking for 20-40 minutes until the surface of the aggregate is not coated with asphalt; the mixed solvent is prepared from 1, 1-diethoxyethane and methyl tert-butyl ether; and S3, carrying out reduced pressure suction filtration and centrifugation on the mixture obtained in the step S2, placing the supernatant in a fuming cupboard for preliminary volatilization, and then placing the supernatant in a forced air drying oven for solvent evaporation at 60-105 DEG C to obtain the recycled asphalt. According to the method, the low-boiling-point solvent 1, 1-diethoxyethane and methyl tert-butyl ether are compounded, and subsequent reduced-pressure suction filtration, centrifugation and volatilization treatment are combined, so that the method for efficiently, simply and conveniently recovering the asphalt from the asphalt mixture is realized, and compared with an existing Ambusan method and a rotary evaporator method, the method has the advantages that the recovered asphalt is high in fidelity, and the recovery rate is high. And no organic solvent is left.

The invention provides a method for decolorizing a waste PET textile in a regeneration process by using a hydrophobic deep-eutectic solvent. The method comprises the following steps: degrading a PET textile through a chemical method, blending the PET textile into a low-molecular solution, and extracting dye in the low-molecular solution through a hydrophobic deep-eutectic solvent, so as to obtain a decolorized polyester degradation product, namely bis (2-hydroxyethyl) terephthalate (BHET). The eutectic solvent used in the method can also be regenerated in a reverse extraction mode for recycling. Extraction decolorization is simple to operate and convenient to operate, and has certain advantages compared with other decolorization technologies.

According to the silk fibroin hydrogel microneedle manufacturing method and the hydrogel microneedle, a silk fibroin solution and a riboflavin aqueous solution are evenly mixed to obtain a mixed solution, then a hydrogen peroxide solution is added into the mixed solution to be mixed to obtain a precursor solution, then the precursor solution is poured into a light-transmitting microneedle mold, and the silk fibroin hydrogel microneedle is obtained. Placing a microneedle mold containing the precursor solution into a vacuum pump, performing vacuum pumping treatment, taking out the microneedle mold, placing the microneedle mold under ultraviolet irradiation for illumination to form a gel, drying the gel at room temperature, taking out the gel from the microneedle mold, forming a plurality of convex cones on the outer surface of the gel, and performing vacuum pumping treatment on the cones to obtain the composite microneedle. The silk fibroin hydrogel microneedle is obtained. According to the design, the operation requirement is low, the slow release effect is good, the biocompatibility is high, and efficient carrying of treatment medicine is facilitated.

The invention discloses a wearable sweat sensor and a sweat detection method. The sweat wearable sensor comprises a sweat gathering layer, a channel layer, a sweat diversion layer, a detection layer and a sensor layer. The detection layer comprises a detection pool and a water storage pool; the detection pool is connected with the water storage pool through a capillary breakthrough valve; the capillary breakthrough valve enables the liquid to only enter the detection pool from the water storage pool in one direction; the sensor layer is provided with an external interface; and the external interface is connected with the reservoir.

The invention discloses a bile conversion product and a preparation method thereof, and belongs to the field of bioengineering technology. The preparation method comprises the following steps: mixing the culture fluid of 7α hydroxysteroid dehydrogenase and 7β hydroxysteroid dehydrogenase secreted and expressed by engineering bacteria with a buffer solution after adsorption, impurity removal, and ultrafiltration concentration, and adding the culture fluid to an ion exchange agar gel column to immobilize the enzyme after adjusting the pH, thereby obtaining an immobilized enzyme column; mixing the avian bile extract with NADP+, adjusting the pH, and then adding the mixture to the immobilized enzyme column for conversion, and obtaining the bile conversion product after the clear liquid is concentrated under reduced pressure and dried under vacuum. The invention uses an ion exchange agar gel column as a carrier for immobilizing hydroxysteroid dehydrogenase, which has good stability, high mechanical strength, and large loading capacity, and the enzyme molecules are not easy to fall off, and can react continuously and the reaction product can be separated from the enzyme in time, thereby reducing the occurrence of reverse reaction, thereby obtaining a bile conversion product with a higher ratio of TUDCA:TCDCA.

The invention discloses a detachable traceless silicone rubber creepage-increasing umbrella skirt and processing equipment and a processing technology thereof, and belongs to the technical field of electric insulation accessory processing, the detachable traceless silicone rubber creepage-increasing umbrella skirt specifically comprises an umbrella skirt body, a mounting hole matched with an insulation plate is formed in the middle of the umbrella skirt body, and an interlocking opening communicated with the mounting hole is formed in the umbrella skirt body in the radial direction of the umbrella skirt body; the interlocking opening can realize autonomous closing and locking, and the closed umbrella skirt body forms a complete closed-loop structure; according to the invention, through the arrangement of the interlocking opening, the umbrella skirt body is directly sleeved into the insulating plate and then the interlocking part is buckled during installation, the umbrella skirt body is separated by hands during disassembly, tools are not needed, adhesive residues are avoided, mechanical damage is avoided, detachable traceless installation is truly realized, the insulating plate body is not damaged, and the later maintenance and replacement efficiency is greatly improved.

A film-type solvent-free laminating machine, the frame includes: the frame includes a first wall panel assembly, a second wall panel assembly, a top plate arranged between the top of the first wall panel assembly and the second wall panel assembly, and a wooden board conveying device erected between the first wall panel assembly and the second wall panel assembly; according to the film material conveying direction, it includes an unwinding device, a storage device, a coating device, a compounding device, a material head traction device and a waste material winding device in sequence. The present invention changes the process method, changes the original glue coating on the wooden board to glue coating on the roll film material, uses a five-roll coating technology, makes the coating uniform, the glue amount is controllable, the glue amount is greatly reduced, and the coating efficiency is improved; develops a coating storage device, makes the coating process continuous, the coating interval is controllable, and the film tension is stable, realizing two modes of interval fixed-length coating and continuous coating; changes the original two rubber rollers to be compounded, and changes to an adjustable lift rubber roller and a hydraulically driven steel roller to be compounded, so that the compounding quality is stable, and there are no bubbles and other undesirable phenomena after compounding.

The invention relates to a pericarp anthocyanin extraction and purification method, which comprises the following steps: taking aired dry grape skin as a raw material, putting the raw material in an extraction tank, adding an extraction solvent for extraction, the extraction solvent comprises an acid aqueous solution and food-grade citric acid, the acid aqueous solution is a sodium pyrosulfite aqueous solution, and obtaining an anthocyanin crude extract; filtering and purifying the crude anthocyanin extracting solution by adopting a hollow fiber membrane to obtain a refined anthocyanin extracting solution; and adjusting the pH value of the anthocyanin refined extract, and carrying out vacuum concentration to obtain a liquid anthocyanin product. According to the method, a traditional extraction method is adopted, an acid aqueous solution of sodium pyrosulfite is selected as an extraction solvent, food-grade citric acid is added, no organic solvent is used, no toxic substance residues exist, meanwhile, the loss of anthocyanin in the subsequent production process is reduced, and the color value and solubility of the anthocyanin product are improved; in addition, fine extract can be obtained by filtering through a hollow fiber membrane during purification, impurities and residual sulfur dioxide are efficiently removed, and the product meets the national standard requirement.

The invention discloses a method for purifying pilin Fim < 2 > / 3 without pertussis component antigen residue. Specifically, pertussis thalli are subjected to heat extraction treatment and then subjected to salting-out, anion exchange and cation exchange to obtain a crude product, and the high-purity pertussis pilin Fim2 / 3 without residues such as pertussis toxin PT, pertussis filamentous hemagglutinin FHA and pertussis adhesin PRN is obtained after multi-mode anion composite chromatography. The pertussis mycoprotein Fim < 2 > / 3 prepared by the method has high biological safety due to high purity, for a component pertussis vaccine taking the pertussis mycoprotein Fim < 2 > / 3 as a new component, a detoxification process which must be adopted due to residues of pertussis toxin PT and the like is avoided, the production process of the component pertussis vaccine is reduced, and the production cost is reduced. The utilization rate of the pertussis pilin Fim2 / 3 and the production and preparation efficiency of the component pertussis vaccine are improved.

This utility model discloses a nozzle device for a centrifuge containing blast furnace molten slag, including a centrifuge roller, a rubber ring, multiple nozzles, and an air ring. The rubber ring is configured to be extended to cover the cotton-like area under the centrifuge roller. An adjustable nozzle angle mechanism is provided between the rubber ring and the air ring. This mechanism includes multiple adjustable supports, one end of which is fixed to the rubber ring, and the other end is connected to the nozzle. This utility model, by extending the rubber ring, increasing the number of nozzles to at least 12, and combining the adjustable nozzle angle mechanism with an anti-clogging device, clears the blind spots of glue coverage in the cotton-like area under the centrifuge roller, reducing the waste cotton rate. Simultaneously, combined with the air ring groove interlocking structure and auxiliary air duct system, it improves the uniformity of cotton dispersion, reduces nozzle maintenance frequency, increases daily output per line, saves glue costs and waste disposal fees, improves the stability of continuous production line operation and resource utilization efficiency, and meets the requirements of efficient utilization and high-cleanliness production of blast furnace molten slag in the metallurgical industry.

The invention discloses a low-VOC easy-pull adhesive tape and a preparation method thereof, and relates to the technical field of adhesive materials, including a first release layer, an easy-pull adhesive layer and a second release layer; the easy-pull adhesive layer includes the following raw material components by weight: 3-6 parts of amino-terminated hyperbranched polysiloxane, 1-3 parts of 1,3-bis(oxiranylmethyl)-5-(2-propylene)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, 30-40 parts of ethylene acrylic elastomer, 10-20 parts of diluent, 2-5 parts of talc, 1-3 parts of aliphatic conjugated diene monomers, 1-2 parts of vinyl trimethoxysilane, 3-5 parts of other monomers, 0.5-1 parts of photoinitiator, and 0.8-1.2 parts of defoamer. The adhesive tape has sufficient tensile performance, high bonding strength, no residual glue when pulled out, and good environmental performance.

The invention relates to the technical field of lithium battery recovery, and discloses an electrochemically-assisted method for rapidly stripping an aluminum current collector from a positive active material, and the preparation method comprises the following steps: under a certain potential condition, metal aluminum is in a corrosion region and exists in the form of Al < 3 + >-under an acidic condition, and the metal aluminum is in a corrosion region; the surface layer aluminum connected with the positive electrode active material is dissolved, so that a tight interface between the positive electrode active material and the aluminum current collector is damaged, and then H2 is generated on the surface of the aluminum foil under the hydrogen evolution potential to blow the positive electrode active material, so that the positive electrode active material is quickly and effectively separated from the aluminum foil. The method provided by the invention is environment-friendly, simple to operate, low in energy consumption, high in efficiency and free of harmful chemical residues, and provides a new thought for stripping the active material in the field of lithium battery recovery.

The application discloses a slow-release granular water-soluble fertilizer special for drip irrigation of facility cultivation crops, which is composed of an inner core particle and a full water-soluble slow-release coating layer coated outside. The inner core particle contains urea, polyphosphoric acid ammonium, potassium nitrate, chelated medium and trace elements and corn porous starch. The coating layer is prepared from sodium lignosulfonate and xanthan gum as main film-forming base materials, cross-linked by citric acid and compounded with sodium hexametaphosphate and sodium citrate. The finished product of the application has water insolubles of less than or equal to 0.12%, and the nitrogen slow-release period can reach 45-60 days at 25 DEG C. The long-term drip irrigation smoothness rate is high under medium-hard water conditions, the granular strength is good and the granules are not easy to be caked, the application is suitable for facility cultivation water-fertilizer integrated drip irrigation systems, and the application has slow-release property, water solubility and use stability.

The invention relates to the field of organic pigments, and discloses a preparation method and application of nano organic pigments with different crystal forms. The preparation method comprises the following steps: 1) dissolving an organic pigment crude product in a good solvent, and adding inorganic salt for activation; 2) dropwise adding a poor solvent at a gradient rate, adding a crystal form guiding agent, and inducing formation of a crystal nucleus; wherein the alpha crystal form directing agent is magnesium stearate; the beta crystal form directing agent is dibutyl phthalate; the gamma crystal form directing agent is polyethylene glycol; the initial gradient rate is 0.5-1 mL / min, and the gradient rate is increased by 0.2-0.3 mL / min every 8-12 min; 3) ultrasonic treatment; 4) cooling, and adding a surface modifier for surface modification; according to the preparation method, the nanometer organic pigment with the target crystal form can be accurately obtained through process regulation and control, the nanometer organic pigment is uniform in particle size distribution, good in dispersity, good in heat-resistant stability and high in color and luster strength, and the nanometer organic pigment has the advantages of being good in flocculation-resistant stability and weather resistance after a coating is formed.

The invention discloses a preparation method and application of a kava extract with soothing and anti-allergy capacities, and the preparation method comprises the following steps: putting kava pepper root powder into an extraction tank, and carrying out subcritical extraction on the kava pepper root powder by using an organic solvent as an extraction solvent to obtain an extraction liquid; sequentially carrying out reduced pressure evaporation and filtration on the extract to obtain a crude extract; adding the crude extract into a feeding bottle of molecular distillation equipment, and carrying out molecular distillation treatment to obtain yellow oily liquid; and finally, drying the yellow oily liquid to obtain the kavalactone extract. The method has the characteristics of high extraction efficiency, no solvent residue and low preparation cost.

This utility model discloses a potato tuber peeling machine, including a peeling box. Inside the peeling box, six correspondingly distributed rotating shafts are rotatably connected. Each of the six rotating shafts is fixedly connected to a brush roller, and each of the six rotating shafts is also fixedly connected to a transmission gear. The teeth of the six transmission gears mesh with each other. A placement plate is fixedly connected to the outside of the peeling box, and a first motor is fixedly connected to the top of the placement plate. The output end of the first motor is fixedly connected to one of the transmission gears. A moving cleaning mechanism is provided at the top of the peeling box, and a lifting and unloading mechanism is provided at the bottom of the peeling box. The moving cleaning mechanism allows for convenient and even movement and cleaning of the potatoes, ensuring they are thoroughly cleaned during the peeling process for convenient subsequent use. The lifting and unloading mechanism allows for easy tilting of the peeling box, facilitating the unloading of the peeled potatoes.

The invention discloses a method for separating and extracting tea polyphenol by a membrane method. The method comprises the following steps: S1, taking crude tea leaves and deionized water; s2, extracting the crude tea leaves with deionized water; s3, merging the extracted leaching solutions, and filtering the merged leaching solutions by using a 150-mesh plate and frame filter; s4, reducing the temperature of the filtrate to 35 DEG C or below; s5, adding the filtrate into an ultrafiltration membrane system for filtering; s6, the ultrafiltration filtrate enters a nanofiltration membrane system to be separated, so that soluble salts are removed; s7, concentration treatment; and S8, drying treatment. According to the method for separating and extracting tea polyphenol through the membrane method, clarification, purification and concentration of tea juice are achieved, the defect of high-temperature concentration can be effectively avoided, the obtained product is excellent in fragrance, color and taste, the content of effective components of the product is obviously increased, solvent residues are avoided, and the water solubility is good; and in the application process, the phenomenon that polyphenols, water-soluble proteins and the like are complexed to form flocculent precipitates is avoided.