276results about How to "Avoid contamination risk" patented technology

The invention discloses a separated modular anchor implantation system with a line, and relates to the technical field of medical apparatuses and instruments. The separated modular suture anchor implanting system comprises an inserter and a storage box, the inserter comprises an insertion rod, and an insertion part is arranged at the head of the insertion rod. An anchor and a suture line are stored in the storage box, an inlet and an outlet are formed in the two ends of the storage box respectively, and the insertion rod can be inserted into the storage box through the inlet, so that the insertion part is connected with the anchor in an inserted mode, the anchor is pushed out of the outlet, and the assembly of the inserter and the anchor is completed; after the anchor nail is implanted by the inserter, the insertion part and the anchor nail can be disconnected and the suture line can be directly withdrawn by moving the inserter in the direction opposite to the implanting direction without being removed by a doctor, so that independent storage of the anchor nail and the suture line is realized, and meanwhile, free assembly of the anchor nail and the inserter is realized; due to the modular structural design, the anchor can be selected and matched according to actual operation requirements, the inserter can be repeatedly used, waste of medical resources is reduced, and environmental protection is facilitated.

The invention relates to the technical field of fish genetic breeding, in particular to a method for improving carassius auratus gibelio resistance to carassius auratus gibelio herpesvirus. A CRISPR (clustered regularly interspaced short palindromic repeats) / Cas9 (CRISPR associated protein 9) gene editing technology is utilized to specifically knock out the carassius auratus gibelio irf10-B gene to obtain a mutant genotype individual of which three irf10-B alleles are terminated in advance, namely the required carassius auratus gibelio with high resistance The invention also discloses two specific knockout targets of the irf10-B gene and an allele sequence corresponding to a mutant genotype individual in which three alleles of the irf10-B are terminated in advance. According to the invention, the function of the irf10-B in the prussian carp is verified for the first time, a new germplasm of which the capability of resisting the herpesvirus of the prussian carp is improved by 30% is rapidly obtained by knocking out the single gene of the irf10-B, and the new germplasm has important industrial value.

The invention discloses a beneficiation method for comprehensive recovery of lithium beryllium resources in fluorite tailings, and belongs to the technical field of beneficiation. According to the method, according to the surface characteristic difference of fluorite associated lithium beryllium minerals, firstly, a metal organic complex and fatty acid are adopted as fluorite and beryllium mineral co-enrichment composite collecting agents, fluorite and beryllium minerals are floated preferentially, and then fluorite and beryllium concentrates are further floated and separated through the beryllium mineral inhibition principle; and the bulk flotation tailings are activated by high-valence metal ions and then subjected to lithium flotation, and lithium concentrate is obtained. By means of the method, qualified metallurgical-grade fluorite and lepidolite concentrate with the Li2O grade being 1.2% can be obtained, the CaF2 recovery rate of 55% or above and the Li2O recovery rate of 65% or above can be achieved, meanwhile, beryllium concentrate with the BeO grade being 2.0% and the recovery rate being 40% can be produced, deep comprehensive recovery of fluorite and associated lithium beryllium resources in fluorite tailings is effectively achieved, and the method is suitable for industrial production. And the method has good social value and economic benefit.

The invention discloses an experiment box for raw material medicine azacitidine, and relates to the technical field of experiment equipment, the experiment box comprises a box body and a sealing device, the left side of the box body is fixedly provided with a temperature control device, the left side of the temperature control device is fixedly provided with a button, the button is electrically connected with the temperature control device, and the front side of the box body is provided with a replacement hole. A replacing plate is slidably mounted on the front side of the box body, a sealing plate slidably penetrates through the right side of the box body, the sealing device comprises a limiting hole, a limiting rod, a limiting spring, a U-shaped rod, a T-shaped plate, a stabilizing plate and a net-shaped frame, and after an experimental container containing azacitidine is placed into the box body, the sealing plate is manually pulled to move leftwards to reset and recover sealing of the box body; when the azacitidine is degraded, moisture in air can enter the box body due to loosening of the sealing plate, so that degradation of azacitidine is accelerated, it can be ensured that the sealing plate is always tightly closed through mistaken touch prevention limitation of the T-shaped plate, and therefore the stability of azacitidine is ensured.

The invention provides a preparation method of rotaxane mechanical interlocking molecules. According to the preparation method, under the condition of not adding a catalyst, dibenzene-24-crown-8, benzene-21-crown-7, an isocyanate derivative and a rod-shaped compound are subjected to a reaction by adopting a one-pot method to obtain the rotaxane mechanical interlocking molecule. The preparation method not only can reach 100% of atom economy and meet the requirements of green chemistry, but also can reach the yield of 65% or above, and realizes efficient preparation of rotaxane mechanical interlocking molecules.

The invention discloses a sample adjusting device for a microbiological detection analyzer, and relates to the technical field of microbiological detection analysis, the sample adjusting device comprises a device main body, an inner cavity of the device main body is fixedly connected with a fixing plate, the fixing plate is fixedly connected with a servo motor, an output shaft of the servo motor is fixedly connected with a rotating disc, and the rotating disc is fixedly connected with a rotating shaft of the rotating disc. A crank is rotationally connected to the rotating disc, a loading table is rotationally connected to the end, away from the rotating disc, of the crank, a guide rail is fixedly connected to an inner cavity of the device body, and a first sample tube and a second sample tube are arranged on the loading table; in the process that the test tube moves to the position below the first sample tube and the second sample tube, a piston rod of a piston barrel moves, detection liquid in a liquid storage barrel is dropped into the test tube, meanwhile, the dropping quantity of the detection liquid can be adjusted and controlled, errors caused by different persons in manual operation are avoided, and the detection accuracy is improved. In addition, direct contact between operators and reagents and samples is reduced in the automatic process, and the risks of cross contamination and environmental pollution are avoided.

The invention discloses an energy-saving uniform-temperature open type sintering furnace applied to production of a DCB copper-clad ceramic substrate, and belongs to the technical field of sintering furnaces, the energy-saving uniform-temperature open type sintering furnace comprises a sintering furnace body, a feeding table and a discharging table are arranged on the two sides of the sintering furnace body respectively, and a sintering hearth is formed in the sintering furnace body. By arranging the holding port, the heat dissipation port and the four-channel heat exchanger, a copper-clad ceramic substrate just entering the sintering furnace body can be preheated, so that energy consumption caused by preheating is reduced, by arranging the heating pipe, high-temperature gas can be further used for driving the waste heat driving mechanism, and by arranging the preheating detection mechanism, the heat dissipation efficiency of the sintering furnace is improved. By arranging the waste heat driving mechanism, air pressure can be provided for the dust removal port, so that the dust removal port has a dust removal function on the copper-clad ceramic substrate, the copper-clad ceramic substrate can be positioned by the sliding plate and the connecting clamping plate on the reciprocating screw, and the copper-clad ceramic substrate is kept in the middle on the material conveying belt, so that the heating efficiency is improved.

The invention provides an HPV16 and HPV18 nucleic acid detection kit based on a one-step two-channel RPA-CRISPR, and belongs to the technical field of cervical cancer detection. The kit for detecting the HPV16 and the HPV18 by the one-step method, provided by the invention, comprises an RPA (recombinase polymerase amplification) reaction reagent, a CRISPR (clustered regularly interspaced short palindromic repeats) / Cas13a detection reagent and a CRISPR / Cas12a detection reagent. The kit disclosed by the invention can be used for simultaneously detecting the HPV16 nucleic acid and the HPV18 nucleic acid on the basis of a one-step two-channel RPA-CRISPR / Cas12a-Cas13a, so that the multi-step transfer operation and the aerosol pollution risk of a two-step CRISPR reaction are effectively avoided, the HPV16 DNA as low as 2.5 copies / L and the HPV18 DNA as low as 5 copies / L can be detected in 30 minutes, and the specificity is good. The sensitivity of the kit for detecting cervix uteri and vagina swab samples is 94.7%, and the specificity is 100%.

The invention discloses a method for extracting human placenta tissue and preparing human placenta tissue injection, which comprises the following steps: screening placenta, unfreezing, soaking, rinsing, draining, weighing, preparing liquid, mincing, grinding and hydrolyzing, adding acid water to adjust the pH value for acid hydrolysis, adding alkaline water to adjust the pH value for alkaline hydrolysis after hydrolysis, and then inactivating viruses. The preparation method comprises the following steps: preparing a human placenta tissue solution, carrying out virus inactivation, carrying out rough filtration and fine ultrafiltration to remove bacteria and filtration, carrying out nanofiltration virus removal treatment by using a nano-membrane to obtain a sterile human placenta tissue solution stock solution, carrying out dilution preparation on the human placenta tissue solution stock solution according to the stock solution concentration, carrying out sterile subpackaging in bottles, sealing and detecting. The prepared human placenta tissue fluid is high in biological activity, the biological activity of the human placenta tissue fluid is effectively guaranteed, and meanwhile the biological safety of the human placenta tissue fluid is guaranteed by adopting a two-time virus inactivation and removal method.

The invention relates to the technical field of environmental protection, in particular to a sludge incineration flue gas efficient purification system which comprises a pretreatment module, a dynamic ion separation module, an acid gas neutralization module, a heavy metal adsorption module, an acid-gold interaction purification module, a deep oxidation module and an intelligent control module. Wherein the pretreatment module is used for receiving initial flue gas flow; the dynamic ion separation module is used for primarily separating heavy metal ions; the acid gas neutralization module is used for stabilizing emission of acid gas; the heavy metal adsorption module is used for accurately adsorbing heavy metal ions; the acid-gold interactive purification module is used for treating composite pollutants; and the intelligent control module is used for automatically adjusting module operation parameters. According to the sludge incineration flue gas treatment system, by integrating an efficient purification technology and intelligent control, comprehensive removal and stable up-to-standard emission of various pollutants in sludge incineration flue gas are achieved, and the response speed, the purification efficiency and the energy-saving effect of the system are improved.

The invention provides an ionization irradiation-electroosmosis coupled sludge deep dehydration and innocent treatment device, system and method. The device comprises: an irradiation shielding housing which encloses a closed processing chamber; the middle layer assembly is arranged in the irradiation shielding shell in an up-and-down movable mode and divides the irradiation shielding shell into an upper-layer processing chamber and a lower-layer processing chamber; the irradiation sources are arranged in the upper-layer treatment chamber and the lower-layer treatment chamber; the middle layer assembly is sequentially provided with a first cathode plate, a first water collecting device and a second anode plate from top to bottom; a first anode plate is arranged at the top of the upper-layer treatment chamber; a second cathode plate and a second water collecting device are sequentially arranged at the bottom of the lower-layer treatment chamber from top to bottom; and the first cathode plate and the second cathode plate are provided with holes and are paved with filter screens. The treatment system and method can realize simultaneous upper-layer irradiation and lower-layer dehydration or lower-layer irradiation and upper-layer dehydration treatment, and have the advantages of high treatment efficiency, safety and reliability.

The invention relates to the technical field of composite plastic processing, in particular to fluoride-free flame-retardant PC / ABS composite plastic and a preparation method thereof.The fluoride-free flame-retardant PC / ABS composite plastic is prepared from, by weight, 15-20 parts of PC, 20-30 parts of ABS, 1-2 parts of compatilizer, 1-1.5 parts of stabilizer, 8-14 parts of flame retardant and 0-1 part of other auxiliaries. Each part of the flame retardant is prepared by mixing polyurethane containing organic phosphate and an inorganic flame-retardant filler according to a weight part ratio of (8-10): 5; the inorganic flame-retardant filler is aluminum hydroxide or / and magnesium hydroxide. The fluoride-free flame-retardant PC / ABS composite plastic prepared according to the formula avoids the release of toxic gas at high temperature, and meets the environment-friendly requirement. According to the flame-retardant PC / ABS alloy plastic, the flame-retardant property of the PC / ABS alloy plastic is remarkably improved through the synergistic effect of the polyurethane containing the organic phosphate and the inorganic flame-retardant filler, the UL94 V-0 grade is reached, the use amount is small, and meanwhile it can be guaranteed that the PC / ABS alloy plastic has good impact resistance, tensile strength and bending strength.

The invention discloses a reversing module and a tissue extraction and collection mechanism, the reversing module comprises a reverser, the reverser comprises a shell and a reversing block embedded in the shell, the shell is provided with an inlet channel, an outlet channel and a collection channel, and the reversing block is provided with a collection channel and an extraction channel which are isolated from each other; the reversing block is arranged in the shell in a sliding mode, and a sliding path at least passes through the first position and the second position so that the inlet channel can communicate with the outlet channel or the collecting channel. An airflow channel is integrally arranged in the fixing seat, the air inlet is used for being connected with airflow supply equipment, and the multiple air outlets surround the collecting channel and are formed downwards; and the air port execution part is fixedly connected with the reverser, is arranged around the collecting channel, is of a contraction structure with a vertically downward opening, and is integrally provided with an air path guiding towards an enclosure area of the air port execution part. Two independent channels are provided for the biopsy instrument through the automatic action of the reversing block, the operation process is clear and standard, and the risks of misoperation and cross infection are avoided.

The utility model relates to the technical field of thermal insulation boxes, in particular to a fully-assembled passive thermal insulation box inner temperature control chamber structure, which comprises a gel type PCM (Pulse Code Modulation) plate used for maintaining a specific temperature interval; the gel type PCM plate hanging bag is used for accommodating and fixing the gel type PCM plate; the supporting frame is used for supporting the gel type PCM plate hanging bag and comprises a top supporting rod, a vertical supporting rod, a bottom supporting rod and a supporting top plate, and all the parts are fixedly connected through bolts. According to the utility model, a temperature control chamber framework in the box body can be built and a gel type PCM can be fixed by matching with a hanging bag through a small number of standard general structural rod pieces and auxiliary components, the disassembly and assembly are simple and convenient, the operation convenience is improved, the rapid size switching of the box body is realized on the premise of not increasing any components, and the cost is reduced. The space utilization rate in the transportation and storage process is improved, the size of the box body can be flexibly changed and adjusted through the universal structural design, and the development time and cost of a new-size box type are greatly shortened and reduced.

The invention belongs to the field of biology, relates to a salmonella gene detection technology, and discloses a one-pot detection method combining LAMP (loop-mediated isothermal amplification) and CRISPR / BrCas12b mediated nucleic acid molecule detection. The method comprises the following steps: designing an LAMP primer, a small guide RNA (Ribonucleic Acid) and a transcription template overlapping PCR (Polymerase Chain Reaction) primer, performing loop-mediated isothermal amplification, constructing CRISPR / Cas shearing recognition (Cas-LAMP), constructing a single-tube one-pot reaction system of the CRISPR / Cas shearing recognition, detecting the specificity and sensitivity of Cas-LAMP amplification, and the like. In order to solve the technical problem that amplification and shearing recognition cannot be carried out synchronously, the invention provides a Cas-LAMP technology capable of linking two-step reaction of amplification and shearing recognition, and accurate, sensitive and rapid detection of nucleic acid molecules is realized in an in-vitro single reaction tube system. Compared with a traditional nucleic acid molecule detection method, the method has the following advantages that one-pot detection can be directly carried out without step-by-step operation, high sensitivity and strong specificity are achieved, and rapid field detection can be achieved. The method provides technical support for conventional nucleic acid detection, and has a wide field instant detection application prospect.

The utility model provides a suction filtration device and a suction filtration method for separating liquid and solid samples in a laboratory, which are convenient for directly and accurately collecting liquid samples. The device comprises a funnel, a suction filtration cover, a sample bottle, a liftable platform, a fixing clamp, a sealing soft ring and a base, the funnel is located at the top of the suction filtration device, the funnel and the suction filtration cover are of a separable assembly structure, an exhaust opening is formed in the outer side of the top of the suction filtration cover, the sample bottle is arranged and located on the liftable platform, and the fixing clamp is arranged above the liftable platform and used for fixing the sample bottle. A sealing soft ring is additionally arranged at the bottom of the suction filtration cover. According to a traditional suction filtration device, liquid samples need to be transferred from a suction filtration bottle to a sample bottle, the suction filtration bottle needs to be frequently cleaned and dried during continuous operation, however, according to the suction filtration device, the liquid samples can be directly collected into the sample bottle, the next separation operation can be carried out by replacing a clean funnel and the sample bottle, the suction filtration separation and sample collection efficiency is improved, and the labor intensity is reduced. Meanwhile, pollution and loss caused in the sample transferring process are avoided.

The invention relates to a high-etching-resistance yttrium-magnesium complex-phase transparent ceramic and a preparation method and application thereof.The preparation method comprises the following steps that magnesium oxide and yttrium oxide are mixed according to a preset proportion to obtain a base material, yttrium-containing fluoride is added to serve as a sintering aid, the adding mass of the yttrium-containing fluoride accounts for 1-10% of the mass of the base material, and the base material is sintered to obtain the high-etching-resistance yttrium-magnesium complex-phase transparent ceramic; forming a multiphase ceramic green body; and sintering the multiphase ceramic green body in an inert oxygen-free atmosphere to obtain the yttrium-magnesium multiphase transparent ceramic with high etching resistance, the etching depth of the yttrium-magnesium multiphase transparent ceramic with high etching resistance is 300 to 500 nm / h. Compared with the prior art, the yttrium-containing fluoride is adopted as the sintering aid, a stable protective fluorinated layer is formed on the surface of the ceramic, the etching resistance of the ceramic is improved, meanwhile, the risk of decomposition and impurity introduction in an etching environment is avoided, and the high-etching-resistance yttrium-magnesium complex-phase transparent ceramic is particularly suitable for etching equipment in semiconductor manufacturing.

The invention provides a methanol power CO2 transport ship fuel inerting and filling treatment system and method. The system comprises a methanol fuel supply system, a BOG inerting system and a methanol fuel filling system. According to the invention, BOG generated by heat exchange between liquid CO2 in the ship CO2 storage tank and the outside is ingeniously utilized as inert gas and is introduced into the fuel cabin and the daily cabinet, so that explosion caused by the fact that outside air enters the fuel cabin and the daily cabinet is avoided. According to the invention, an inert gas generator is omitted, the cost of equipping the inert gas generator and the operation cost are reduced, and the economical efficiency is good; and in addition, harmful methanol gas discharged from the fuel cabin during methanol fuel filling is introduced into the GCU unit for combustion, so that environmental pollution and explosion risks possibly caused when the methanol gas is discharged into the atmosphere are avoided, and relatively high practicability and environmental friendliness are achieved.

The embodiment of the invention provides a sterile nanobubble lavage fluid for cleaning silicone oil filled in eyeballs, and is characterized in that the sterile nanobubble-containing lavage fluid comprises nanobubbles with the size range of 100-500nm; the concentration of the nanobubbles is not lower than 2.0 * 10 < 7 > / mL. According to the sterile nano-bubble-containing lavage fluid, no chemical agent is used in the process of preparing the nano-bubble-containing lavage fluid and using the nano-bubble-containing lavage fluid to clean silicone oil in eyes, the risk of silicone oil removal operation is greatly reduced, residual silicone oil in the eyes can be safely and effectively removed, the existence time of nano-bubbles is longer, the nano-bubbles are easy to store, the silicone oil removal rate is higher, and the application range of the nano-bubble-containing lavage fluid is widened. The nano-bubble perfusate does not need to be prepared on site, can be prepared into the perfusate firstly, is stored under proper conditions and can be transported for a long distance, so that the risk of bacterial contamination caused by on-site preparation is avoided.

The invention discloses a low-pulsation rolling wheel internal rotation parallel multi-pipe peristaltic pump which is characterized in that an extrusion mechanism, a driving mechanism, a rolling wheel rotating mechanism and a pipeline mechanism are arranged on a mounting table plate, the pipeline mechanism comprises an inlet and outlet liquid distribution pipe and a hose, and the liquid distribution pipe is arranged outside the extrusion mechanism in the vertical direction; the hoses are arranged in the extrusion mechanism in parallel at equal intervals in the vertical direction, and the two ends of the hoses are connected with the liquid distribution pipes correspondingly; the roller rotating mechanism is positioned on the inner side of the hose and connected with the driving mechanism; the driving mechanism drives the roller rotating mechanism to rotate and extrude the hoses, the single-pipe-multi-pipe-single-pipe fluid conveying process is achieved, continuous and uniform time differences exist when all the hoses are extruded and loosened, and continuous low-pulse fluid conveying is achieved. The peristaltic pump has the advantages of being low in abrasion loss of the inner wall of the hose and high in continuous filling precision, pulsation during fluid transmission is effectively reduced, and the problems that in an existing peristaltic pump, due to the fact that the inner wall of the hose is seriously abraded, a large number of particles are generated, fluid is polluted, and the continuous filling precision is low are solved.

The invention belongs to the technical field of high polymer materials, and particularly relates to a low-viscosity self-adhesion protective film and a preparation method thereof. The protective film comprises an outer contact layer, a support layer and a self-adhesive adhesion layer. The outer contact layer is made of a modified elastomer material; the supporting layer is made of a modified polyolefin material; the self-adhesive layer is a modified acrylate hot-melt pressure-sensitive adhesive and comprises an acrylate monomer, a reversible cross-linking agent, a plasticizer, an initiator, a hindered phenol antioxidant, a hindered amine light stabilizer and a reaction control aid; the acrylate monomers comprise butyl acrylate, isobornyl methacrylate and hydroxyethyl acrylate, the reversible cross-linking agent is bis (2-methallyl) ethyoxyl disulfide, the plasticizer is a polyurethane elastomer, and the hindered phenol antioxidant is an antioxidant 1010; the hindered amine light stabilizer is a light stabilizer 770, the reaction control aid is diethyl hydroxylamine, and the initiator is di-tert-butyl peroxide.

The utility model provides a two-stage linkage quick material taking device for white spirit ground cylinder fermentation, belongs to the technical field of white spirit brewing, and mainly solves the problems of oil pollution, slower material taking speed and limited height in the prior art. Which comprises a first-stage movable device, a second-stage movable device and a material containing barrel, and is characterized in that the first-stage movable device comprises a first fixed beam, a second movable beam, a fourth fixed beam, a second beam driving device and a second beam guide column; one end of the second beam guide column is fixedly connected with the first fixed beam, and the other end is fixedly connected with the fourth fixed beam; the second movable beam is in sliding connection with the second beam guide column through a through hole in the second movable beam. The second-stage movable device comprises a second movable beam, a third movable beam, a fifth movable beam, a third beam driving device and a third beam guide column; one end of the third beam guide column is fixedly connected with the second movable beam, and the other end is fixedly connected with the fifth movable beam; the third movable beam is in sliding connection with the third beam guide column through a through hole in the third movable beam. The driving device comprises a motor, a speed reducer, a chain wheel set and a chain.

The present invention discloses a continuous production blow-fill-seal equipment, comprising an extruder, an extrusion die connected to the extruder, a filling needle inserted in the extrusion die, a bottle head mold located below the extrusion die, and a bottle body mold and a lower clamping assembly located below the bottle head mold, wherein the lower clamping assembly is arranged on a first lifting mechanism, the bottle head mold and the bottle body mold are arranged on a second lifting mechanism, and the lower clamping assembly comprises a pair of clamping plates, the inner side of the clamping plates is provided with a bottle body positioning groove, the bottle body positioning groove is provided with a bottle head positioning groove below the bottle body positioning groove, and the sides of the bottle body positioning groove and the bottle head positioning groove are provided with cooling channels. The method of using the equipment comprises the following steps: the extruder extrude the embryo, the lower clamping assembly rises to the bottom of the embryo between the bottle body molds and moves downward, the bottle body mold and the bottle head mold are used to shape the embryo into a bottle body and a bottle head, and at the same time, the lower clamping assembly, the bottle head mold and the bottle body mold are synchronously lowered, and after the bottle body mold is opened and before the bottle head mold is opened, the lower clamping assembly rises to the bottle body mold to clamp the bottle body.

The invention discloses portable laser-assisted night vision equipment, which belongs to the technical field of night vision devices and comprises a night vision device body, an eyepiece and an objective lens are arranged at two ends of the night vision device body respectively, two combinable semi-cylindrical handle rods are arranged at the bottom of the night vision device body, and a folding assembly is arranged at the bottom of the night vision device body. A locking assembly is arranged on the folding assembly, and an unfolding and supporting assembly is arranged between the folding assembly and the semi-cylindrical handle rod; according to the night vision device, the two semi-cylindrical handle rods are unfolded and supported through the arranged unfolding and supporting assembly, a user can conveniently use the night vision device body for night vision monitoring in the prone posture, the folded and locked semi-cylindrical handle rods can serve as lifting handles, a convenient lifting and carrying mode is provided, and the practicability is high. Through the covering and protecting assembly, a user can automatically cover the objective lens while folding the semi-cylindrical handle rod, the operation of manually covering and protecting the objective lens is omitted, and through the fool-proof design, the risk that the objective lens is scratched or polluted due to the fact that the objective lens is not covered is avoided.

The invention discloses a tubular double-membrane ammonia nitrogen removal and recovery device. The device comprises a shell, a cation exchange membrane and a hollow fiber hydrophobic membrane which are sequentially arranged from outside to inside, a wastewater inlet chamber is formed between the shell and the cation exchange membrane; a driving chamber is formed between the cation exchange membrane and the hollow fiber hydrophobic membrane; a recovery chamber is formed in the hollow fiber hydrophobic membrane; the hollow fiber hydrophobic membrane comprises a plurality of bunchy hollow membrane filaments, and a regulation and control device for adjusting the opening degree is arranged corresponding to an acid liquor inlet of the hollow fiber hydrophobic membrane, so that the number of the membrane filaments participating in acid liquor contact work can be adjusted. Due to the fact that the number of the membrane filaments is adjustable, waste of acid liquor and pollution of the membrane filaments are greatly reduced, meanwhile, due to the fact that the multiple membrane filaments are arranged, efficient mass transfer of ammonia gas is achieved, and the decontamination capacity and the recovery efficiency of the whole device are improved. In addition, due to the reasonable arrangement of the electric driving assembly, composite driving of an electric field and a concentration field can be formed, and then high-concentration ammonia-nitrogen wastewater is effectively treated.

The invention relates to a flame-retardant sponge based on a biomass flame retardant and a preparation method of the flame-retardant sponge. The flame-retardant sponge is prepared from the following components in parts by weight: 90 to 110 parts of polyether polyol, 50 to 90 parts of MDI (methylene diphenyl diisocyanate) or TDI (toluene diisocynate), 0 to 0.5 part of chain extender, 0.05 to 4 parts of efficient foam stabilizer, 0.05 to 0.5 part of efficient composite catalyst, 0 to 6 parts of external foaming agent, 1 to 5 parts of water and 0.1 to 2 parts of biomass flame retardant, the preparation method of the biomass flame retardant comprises the following steps: reacting sodium phytate with hydroxypropyl-beta-cyclodextrin, carrying out suction filtration, washing, and carrying out vacuum drying to obtain the biomass flame retardant of the phytic acid cyclodextrin ester. The preparation method has the advantages that the biomass material-grade halogen-free flame retardant is added in synthesis of a polyurethane flexible foam material, and phytic acid cyclodextrin ester with flame retardance is anchored to PU, so that a durable flame-retardant effect is achieved; the flame retardant is free of pollution and harm, the addition amount of the biomass flame retardant is small, the performance of the PU is not affected, and the effect of being free of smoke poisoning can be achieved.

The invention relates to a multiphase VC mixture, a storage and use method thereof, a cosmetic and a storage package. The multiphase VC mixture comprises 6-8 parts of VC, 8-10 parts of a water-soluble VC derivative and 4-6 parts of an oil-soluble VC derivative. The oil-soluble VC derivative is prepared from ascorbyl tetraisopalmitate, tetrahexyldecanol ascorbate and ascorbyl dipalmitate; the water-soluble VC derivative comprises VC ethyl ether, VC glucoside, VC magnesium phosphate and VC sodium phosphate. The prototype VC, the water-soluble VC derivative and the oil-soluble VC derivative are used in proportion to generate a synergistic effect, so that the effects of the VC, including removal of free radicals (DPPH) and inhibition of tyrosinase, are effectively improved, and in combination with a storage and use mode of an independent package of the prototype VC, fresh-keeping use of the VC is effectively realized, and the use effects of cosmetics are improved. By means of the storage package designed in different bins, different-bin sealed storage is achieved, and leakproofness of mixed use is achieved.

The invention relates to an automatic mixing and supplying system for grinding fluid. The system comprises a mixing mechanism, a supplying mechanism, a wet nitrogen generating mechanism and a PLC control system. The mixing mechanism is provided with a mixing barrel, a mixing pump arranged at the bottom of the mixing barrel and at least two stirring nozzles arranged in the mixing barrel, and the stirring nozzles are matched with the mixing pump to circularly mix the grinding stock solution and the ultrapure water. The supply mechanism is provided with a supply barrel connected with the output end of the mixing pump and a supply pump arranged at the bottom of the supply barrel and used for supplying the grinding liquid to the client side. The wet nitrogen generating mechanism is provided with a generating tank, a wet nitrogen generator arranged in the generating tank and a generating joint which is connected with the wet nitrogen generator and is used for introducing ultrapure water and high-purity nitrogen, and a nitrogen filter is arranged at the generating joint; an outlet of the generation tank is respectively connected with inlets of the mixing barrel and the supply barrel and is provided with a flow meter and a pressure sensor which are used for monitoring the output flow and the output pressure of wet nitrogen generated by the generation tank.

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

In order to solve the problems that the placenta collecting, cleaning and preprocessing processes are complex in operation and prone to pollution, the placenta collecting, cleaning and preprocessing device comprises a box body and a box cover, and is characterized by further comprising a partition plate, at least two sets of bosses are arranged on the inner wall of the box body in the height direction, sieve holes are formed in the partition plate, and the partition plate is provided with a baffle. The diameter of the partition plate is smaller than the diameter of the inner wall of the box body and larger than the inner diameter of the boss, the outer edge of the partition plate is provided with a groove distributed corresponding to the boss in position, the boss is in clearance fit with the groove, the vertical position of the placenta is changed through the partition plate, and the placenta collecting, cleaning and processing functions are achieved. The problems that the operation of separating placenta collection, cleaning and treatment for multiple times of container conversion is tedious and pollution is easily caused by multiple placenta transfer are solved.