116results about How to "Dissolve fast" patented technology

The invention discloses a microneedle patch loaded with a sorafenib and copper-doped Prussian blue nano material and application of the microneedle patch in in-situ triple-negative breast cancer treatment. The sorafenib and the copper-doped Prussian blue nano material are loaded in a needle body of the microneedle patch. The microneedle patch can accurately deliver nanoparticles and sorafenib to tumor tissues, the chemical kinetics effect is enhanced through an efficient and mild photothermal therapy, the ferroptosis of triple negative breast cancer cells is enhanced through ferroptosis induced by the nanoparticles and sorafenib in cooperation with drugs, then cell death is induced, and the curative effect is improved. And a brand-new and promising treatment method is provided for in-situ triple-negative breast cancer treatment.

The invention provides a phenazine-quinoxaline organic electrode material, and belongs to the technical field of aqueous zinc ion battery electrode materials, and the phenazine-quinoxaline organic electrode material is synthesized from 2, 3-diaminophenazine and 2, 5-dihydroxy-1, 4-benzophenone through a dehydration condensation reaction. The organic electrode material can be used for manufacturing a positive electrode of an aqueous zinc ion battery, and shows relatively high reversible specific capacity, relatively long cycle life, relatively good rate capability and relatively good wide temperature range performance. The invention also provides an application of the phenazine-quinoxaline organic electrode material in preparation of an aqueous zinc ion battery.

The invention provides a pharmaceutical preparation pharmacological experiment dissolving device, and relates to the technical field of pharmacological experiments, the pharmaceutical preparation pharmacological experiment dissolving device comprises a workbench, a circular mounting plate is rotatably mounted on the upper surface of the workbench, a dissolving barrel is movably mounted on the upper surface of the circular mounting plate, and side plates are mounted on both sides of the upper surface of the workbench; a mounting box is arranged between the two side plates, an adjusting mechanism used for controlling the mounting box to move is arranged on one side of each side plate, and a grinding mechanism is arranged in the mounting box. According to the medicine grinding device, through driving of a first driving motor, under the meshing effect of two driving gears and a driven gear, two second rotating rods can be driven to rotate in the opposite directions, two grinding rollers rotate in the opposite directions, medicine can be ground, manual crushing treatment is not needed when large-size medicine is dissolved, time is saved, and the working efficiency is improved. And waste generated in the manual medicine crushing process can be effectively avoided, and the ground medicine can be dissolved more quickly.

The invention discloses a microneedle patch loaded with vancomycin and a gold / zinc cerium composite nanomaterial and application of the microneedle patch in abscess wound treatment, the microneedle patch comprises a backing layer and a needle body array arranged on the backing layer, the backing layer and the needle body array are formed by an aqueous solution of a degradable polymer, vancomycin and a gold / zinc cerium composite nano material are loaded in an aqueous solution of the degradable polymer for forming the needle body array. According to the microneedle patch disclosed by the invention, based on the photo-thermal synergistic effect of the antibiotics and the gold / zinc-cerium composite nanomaterial, rapid healing of abscess wounds is realized from the aspects of inhibiting growth of bacteria, relieving oxidative stress, promoting angiogenesis and the like.

The invention belongs to the technical field of metal materials and processing, and relates to a dissoluble magnesium alloy structure, a material and a preparation method. The magnesium alloy structure comprises nano-sized magnesium alloy grains and metal elements segregated along the grain boundary. The nano-sized magnesium alloy crystal grains comprise magnesium alloy crystal grains with the size of 1-999 nm; the segregation amount of the metal elements comprises 1 to 100 atomic layers; the low-alloying material Mg < n > A E < e > alloy of the soluble magnesium alloy structure is specifically prepared from 0.001 at.%-0.5 at.% of an element A, 0.001 at.%-0.5 at.% of an element E and the balance of an element Mg, wherein the element A is selected from one or more of Al, Zn, Ca, Mn, Zr, Si, Sr and RE elements; and the E element is selected from one or more of Cu, Ni and Co elements. The preparation method of the low-alloying material comprises the processes of alloy casting, machining forming, surface nanocrystallization, heat treatment and the like. The prepared soluble magnesium alloy material has good mechanical property and dissolving property, and can meet the requirement of soluble magnesium alloy required by shale oil and gas development.

The invention relates to an aluminum circulation method for metal aluminum energy storage and hydrogen production, and belongs to the technical field of aluminum material production. The method comprises the steps that aluminum oxide is fed into an electrolytic aluminum factory for electrolysis, and metal aluminum liquid is obtained; the metal aluminum liquid is processed, and the aluminum-based hydrogen production material with the large specific surface area is obtained; the method comprises the following steps: carrying out chemical reaction on an aluminum-based hydrogen production material and water under the action of a nitrogen-containing strong alkaline organic matter catalyst to obtain hydrogen and alumina hydrate slurry; performing solid-liquid separation on the alumina hydrate slurry to obtain alumina hydrate and an aqueous solution containing the catalyst; roasting the alumina hydrate to obtain high-activity metallurgical-grade alumina; the high-activity metallurgical-grade aluminum oxide is cyclically used for preparing metal aluminum liquid through electrolysis, and the aqueous solution containing the catalyst is cyclically used for hydrogen production through reaction of the aluminum-based hydrogen production material and water, so that a closed-loop cycle is formed. The defects of high energy consumption, high carbon emission intensity, high cost and the like in the metal aluminum preparation and aluminum recycling process are overcome.

The invention discloses an automatic dosing device and method for circulating water. The automatic dosing device comprises a box body, and an automatic quantitative dosing mechanism for quantitatively dosing into the box body is arranged at the top of the box body; and the automatic quantitative chemical adding mechanism comprises a round box fixed to the top of the box body, the top of the round box communicates with a hopper, a mounting cylinder is fixed to the top wall of the round box, a rotating cylinder is rotationally connected to the interior of the mounting cylinder, and a connecting column is fixed to the bottom of the rotating cylinder. According to the circulating water automatic dosing device and method, through the arrangement of the automatic quantitative dosing mechanism, automatic quantitative dosing of medicine powder is achieved, one-time quantitative medicine adding is completed by rotating a cam by a circle and pressing a sleeve once, medicine added every time is quantified, and therefore the concentration of medicine in water is well controlled; the phenomena of medicine waste and poor purification effect due to too little medicine are avoided.

The invention relates to the field of stirring equipment, in particular to solid chemical product smashing, dissolving and stirring equipment which comprises a reaction tank, a top cover used for sealing is arranged at the top end of the reaction tank, a power device is arranged at the center of the upper end face of the top cover, and a detachable smashing device is arranged at the bottom end of the power device. A crushing device is arranged at the bottom end of the output end of the power device, a fairing is arranged at the outer part of the crushing device, a plurality of U-shaped holes for guiding flow are formed in the outer part of the fairing at equal intervals, and a mixing device capable of driving a dissolving solution to rotate and move downwards at the same time is arranged at the outer part of the power device. The power device drives the crushing device to rotate at a high speed and drives the dissolving solution and the solid chemical particles to flow upwards, the solid chemical particles are crushed through the crushing device, the stirring equipment can crush and stir the solid chemical particles at the same time, and the problems that the dissolving period of the solid chemical particles is long and the dissolving efficiency is low are solved. The dissolving efficiency is low.

This invention relates to a solid cleaning agent, its method of use, and its applications. Specifically, the solid cleaning agent is a tablet comprising an outer layer and an inner layer, preferably an effervescent tablet cleaning agent. The solid cleaning agent can be used to remove various stains, especially oil stains, from various surfaces, including ceramic, glass, wood products, floors, metal, plastic, and fabric surfaces. The stains include oil stains, heavy oil stains, marker stains, glue residue, soap scum, etc.

The utility model belongs to the technical field of cleaning supplies, and particularly relates to a layered solid toilet cleaner which comprises a toilet cleaner body, a packaging assembly is arranged outside the toilet cleaner body, and the problems that functional components of the solid toilet cleaner are unreasonably released, and packaging is not easy to tear are solved. When the toilet cleaner is used, a user can hold the anti-slip lines on the surface of the soluble film with one hand, so that the toilet cleaner body can be firmly held, the tearing piece is pinched with the other hand, tearing is carried out along the direction of the second indicating arrow, the outer-layer protective film is torn along the tearing line, a section of the toilet cleaner is exposed, and at the moment, the exposed toilet cleaner body can be held with the hand, and the other half of the outer-layer protective film is taken down. The surface of the toilet cleaner body is wrapped with the easily-soluble film, so that hands are prevented from making contact with the surface of the toilet cleaner body, the easily-soluble film can be rapidly dissolved after making contact with water, use of the toilet cleaner is not affected, and the problem that the package is not easy to open is effectively solved.

The utility model relates to the technical field of concrete production, in particular to a concrete admixture premixing device which comprises a premixing box and a rotating cylinder, a liquid inlet pipe and a liquid outlet pipe are arranged on the pre-mixing box, and a plurality of supporting legs are arranged on the bottom surface of the pre-mixing box; the rotating cylinder is rotationally mounted on the inner wall of the upper end of the premixing box; an auxiliary assembly for stirring the concrete admixture in the rotating cylinder is arranged at the feeding hole; the upper end of the stirring assembly is connected with the bottom surface of the rotating cylinder. The stirring assembly drives the rotating cylinder to rotate, the concrete admixture can be dissolved more quickly through relative movement between the rotating cylinder and the auxiliary assembly, and meanwhile the dissolved concrete admixture and liquid in the pre-stirring box are further mixed through the stirring assembly. Furthermore, the concrete admixture can be dissolved more quickly and uniformly; and meanwhile, the arranged stirring assembly drives the rotating cylinder to rotate, so that a new driving piece is prevented from being added, and energy is saved.

The utility model relates to the technical field of resonator wafer processing accessories, in particular to a wafer positioning plate with information codes. According to the utility model, the information code is arranged on the ceramic chip, the ceramic chip is fixedly connected in the positioning groove, and the upper surface of the ceramic chip is lower than the notch of the positioning groove, so that the information code is effectively prevented from being directly exposed, the damage risk caused by external friction, corrosion and other factors is reduced, and the service life of the information code is obviously prolonged; and the long-term readability of the information is ensured.

The utility model relates to the field of rare earth production devices, in particular to a rare earth molten salt electrolysis device which comprises a bottom plate, an electrolytic bath is fixed to the bottom plate, a top cover is arranged at the top of the electrolytic bath, an inlet hole is formed in the top cover, a lifting motor is further fixed to the bottom plate, and a screw is fixed to the output end of the lifting motor. A plurality of sliding rods are further fixed to the bottom plate, a sliding plate is further arranged above the bottom plate, a threaded pipe is fixed to the sliding plate, the screw penetrates through the threaded pipe and is in threaded connection with the threaded pipe, the sliding rods penetrate through the sliding plate and are in sliding connection with the sliding plate, a rotating disc is arranged on the sliding plate, and the rotating disc is driven by a rotating motor to rotate. Fixing devices are further symmetrically fixed to the two sides of the rotary disc, each fixing device comprises a positioning plate fixed to the rotary disc, and a positioning ring is fixed to each positioning plate. According to the device, electrolysis can be started without waiting for a new cathode bar to be fixed after the cathode bar subjected to electrolysis is taken down, and the rare earth molten salt electrolysis efficiency is greatly improved.

The present application relates to a kind of low metal ion residual chip CMP post-cleaning agent and preparation method and application.The cleaning agent includes the following components according to weight part: functional agent 8-35 parts;Chelating agent 5-15 parts;pH adjusting agent 5-20 parts;Corrosion inhibitor 0.1-1 parts;Water 30-70 parts.The present application uses the symmetrical carbon skeleton structure of triphenylene with high chemical stability as functional agent, through the combination of functional agent and chelating agent, to achieve the effect of efficiently cleaning copper wafer surface residues and quickly dissolving metal oxides.The cleaning agent of the present application is environmentally friendly, non-polluting, and has low volatile loss, and is harmless to the environment and human body.

The invention relates to the technical field of hydrogel application, in particular to a photopolymerization rapid prototyping transparent medical hydrogel application and a preparation method thereof. The invention discloses a transparent medical hydrogel patch capable of being rapidly formed through photopolymerization. The transparent medical hydrogel patch comprises hydrogel, the hydrogel is prepared by the following steps: coating a release film with a pre-polymerization liquid containing ultraviolet light activity, and carrying out polymerization molding through ultraviolet light irradiation. According to the transparent medical hydrogel patch, vinyl monomers serve as raw materials, the hydrogel patch is prepared in a coating mode, the problem that leveling is difficult when the hydrogel patch is injected into a mold is solved, continuous batch production can be carried out, the hydrogel patch can be completely formed only by 5-15 s of UV polymerization time, and the light polymerization efficiency is remarkably improved.

The utility model belongs to the field of food inspection, and particularly relates to a dissolving device for food inspection, which comprises a workbench, and the top of the workbench is fixedly connected with a rack; a lifting electric push rod is fixedly connected to the side face of the rack, a support is fixedly connected to the output end of the lifting electric push rod, a motor is fixedly connected to the top of the support, a rotating shaft is fixedly connected to the output end of the motor, stirring blades are fixedly connected to the bottom end of the rotating shaft, a sliding rail is fixedly connected to the rack, and the support is slidably connected with the sliding rail. A worker places a sample container above the workbench and under the rotating shaft and the stirring blades, and then the lifting electric push rod can drive the support to move up and down so as to drive the rotating shaft and the stirring blades to move downwards, so that the stirring blades are inserted into the sample container, and the stirring blades are driven by the motor to rotate to stir a sample and a solution. And therefore, a sample can be quickly dissolved conveniently, and a worker can use the device conveniently.

The invention belongs to the technical field of food processing, and particularly relates to a dendrobium officinale mixture and a preparation method thereof, the mixture comprises the following raw materials: dendrobium officinale, a drying aid and plant polyphenol; the drying aid comprises cellulose ether. The dendrobium officinale mixture provided by the invention can be quickly dissolved, has no caking, and is good in dispersity and solubility, various nutrient substances of dendrobium officinale are well reserved, the powder yield is high, the polysaccharide content is high, and a blended beverage is light green in color and mellow and smooth in taste.

The invention relates to the technical field of potassium phosphate preparation, and discloses an industrial preparation method of instant monopotassium phosphate, which comprises the following steps: transforming idle washing powder production equipment into an equipment system for preparing the instant monopotassium phosphate; preparing a potassium hydroxide solution with the concentration of 20-90% in an alkali dissolving tank; the method comprises the following steps: mixing a phosphoric acid solution with a potassium hydroxide solution for reaction to obtain a neutralization solution, and atomizing the neutralization solution into liquid drops through a pressure atomization system at the upper part of a drying tower. By breaking through waste heat recovery and utilization in industrial production, reform of a production process technology and establishment of an LTE (Long Term Evolution) technology, one-step puffing drying of a neutralization solution obtained by reaction of wet-process phosphoric acid and potassium hydroxide in a powder spraying tower is realized, and hollow, loose and porous KDP201 particles are formed.

The utility model discloses a water and fertilizer integration machine relates to irrigation related technical field. The utility model discloses a water and fertilizer mixing tank, water pipe, material pipe, base plate and base, and the upper fixed joint of base upper end has water and fertilizer mixing tank, and the upper portion of water and fertilizer mixing tank one side is fixed with water pipe, and the upper portion of water and fertilizer mixing tank opposite water pipe side is fixed with material pipe, and the top of material pipe is fixed with material cylinder, and the inside of material cylinder is provided with grinding parts, the bottom rotation of base plate is connected with main shaft, and the lower portion of main shaft and auxiliary shaft all are fixed with the stirring paddle of annular array distribution. The utility model discloses a main shaft, auxiliary shaft, base plate, material pipe, material cylinder, grinding parts, filter one, filter two, base, gyro wheel, water pump, liquid outlet hose, solve the problem that the water and fertilizer integration machine is short of supplementary stirring mixing structure, and solid fertilizer is short of pretreatment structure, and the impurity in water and fertilizer and irrigation water possibly blocks the pipeline, and the adaptability of fixed type water and fertilizer integration machine is lower.

The invention relates to the technical field of washing equipment, particularly provides a spray head and washing equipment comprising the spray head, and aims to solve the problem that a treating agent of existing washing equipment is insufficiently dissolved. Therefore, the spray head comprises a shell and a filter screen assembly, a speed increasing channel, a mixing cavity and a clothes treating agent channel communicated with the mixing cavity are formed in the shell, a first gap is formed between the filter screen assembly and the mixing cavity, and water in the speed increasing channel enters the mixing cavity; negative pressure is generated in the mixing chamber, air is sucked in through the first gap, mixed liquid of water, air and the clothes treating agent is formed in the mixing chamber, the filter screen assembly can cut the mixed liquid into micro-foam to be sprayed out from the outlet, and the water, the air and the clothes treating agent are mixed into the mixed liquid through the mixing chamber. The clothes treating agent can be fully dissolved and mixed, then the mixed liquid is cut into micro-foam through the filter screen assembly to be sprayed out from the outlet, and therefore clothes can make full contact with the micro-foam, and the washing efficiency of the washing equipment is improved.

The invention discloses a water and fertilizer integrated control device which comprises a water distribution flow guide assembly installed at the top of a column water distribution box, a column material mixing box is installed on one side of the column water distribution box, the column material mixing box communicates with the column water distribution box through the water distribution flow guide assembly, and a rotary material mixing part is rotationally arranged in the column material mixing box; the transmission assembly is located between the water distribution flow guide assembly and the rotary material mixing part, the fertilizer storage assembly is fixedly installed on one side of the cylindrical material mixing box, a rotary discharging part is rotationally arranged in the fertilizer storage assembly, a discharging control assembly is slidably arranged at the top of the fertilizer storage assembly, and the transmission assembly and the discharging control assembly are both fixedly arranged on the water and fertilizer configuration control assembly; water in a cylindrical water distribution box is extruded through downward movement of a water pressing piston, quantitative distributed water is conveyed into a cylindrical mixing box, a first gear is driven to rotate through horizontal movement of a second transmission rack, so that vortex water flow is generated in the cylindrical mixing box, and fertilizer conveyed into the cylindrical mixing box can be rapidly dissolved.

The utility model discloses a sodium hypochlorite PH (potential of hydrogen) adjusting device, which relates to the technical field of biochemical engineering and comprises a bottom plate and a stirring barrel, a back plate is fixedly connected to the rear side of the top of the bottom plate, the stirring barrel is arranged at the middle end of the top of the bottom plate, and a cover plate is connected to the top of the stirring barrel through threads. The mixing device has the advantages that the output end of the servo motor drives the Y-shaped plate to rotate and drives the first gear to rotate along with the Y-shaped plate, the first gear drives the second gear to rotate under the action of meshing with teeth of the hollow gear, and the mixing mechanism is arranged in an inner cavity of the mixing barrel, and the noise reduction device is arranged on the outer side of the mixing barrel. In the rotating process of the second gear, a third gear is driven to rotate through the tooth meshing effect, and meanwhile, a connecting rod and stirring blades are driven to rotate, so that sodium hypochlorite in the stirring barrel is fully stirred, and the sodium hypochlorite can be quickly and efficiently dissolved.

The utility model discloses a book printing centralized ink supply device, including base, the base top fixedly connected with ink cylinder, the ink cylinder top is equipped with the cylinder cover, be equipped with the anti -solidification part in the ink cylinder, be equipped with the moving part between cylinder cover and base, the anti -solidification part includes the heating cavity of setting in the ink cylinder inner wall, with the fixed connection of heating cavity top one side oiling pipe, with the pipe cover of oiling pipe top connection, with the fixed connection of the oil discharge pipe of heating cavity bottom one side and with the control valve of oil discharge pipe outside fixed connection, the utility model discloses a base, ink cylinder, cylinder cover and anti -solidification part are set up, have solved the ink supply device of current when using, although can supply ink, but the ink is easy to solidify and deposit in the ink barrel, although can heat the ink through the heating plate, but its heating is not enough uniform, lead to ink dissolution speed slow, thereby lead to the problem of reduced practicality.

The utility model relates to the technical field of oral solution processing, and discloses procaterol hydrochloride oral solution processing equipment which comprises a dissolving tank and a stirring assembly arranged in an inner cavity of the dissolving tank, and the stirring assembly stirs raw materials in the inner cavity of the dissolving tank through opening and closing movement; a tank cover is arranged on the upper end face of the dissolving tank, feeding hoppers are symmetrically installed on the tank cover and communicated with an inner cavity of the dissolving tank, electromagnetic valves are arranged at the communication positions of the feeding hoppers and the dissolving tank, one feeding hopper is communicated with a fan, and the other feeding hopper is communicated with an air outlet. And the fan is used for introducing air into the feeding hopper and mixing the raw materials in the inner cavity of the feeding hopper. According to the stirring device, raw materials and dissolved materials in the dissolving tank can be mildly stirred, the situation that the solution splashes is effectively avoided, and meanwhile the raw materials can be premixed so that the dissolved solution can rapidly reach the preset concentration.

The utility model discloses a pedestal pan sleeve, in particular to a disposable pedestal pan sleeve, which comprises a part I covering a pedestal pan ring and a part II arranged in a pedestal pan cavity and capable of temporarily storing excrement, the part I is transited to the part II through an easy-to-tear line, and a hand tearing part is formed on the easy-to-tear line and extends out of a pedestal pan. The utility model solves the technical problem that the excrement is prevented from being polluted by directly contacting with the stored water of the pedestal pan before the sampling is finished. Compared with the prior art, the disposable pedestal pan sleeve has the following technical advantages and characteristics that before a patient defecates on a pedestal pan, the disposable pedestal pan sleeve is laid firstly, then defecation is completed, excrement can be temporarily stored in the part II of the pedestal pan sleeve, and the excrement can be stored in the part II of the pedestal pan sleeve; the situation that excrement is polluted due to the fact that the excrement is in direct contact with stored water of the pedestal pan before sampling is completed is thoroughly avoided.

This invention discloses a high-efficiency chemical application device for wastewater treatment sedimentation tanks and its usage method. The chemical application device includes: a moving unit, a mixing unit, a filtering unit, and a chemical application unit. The moving unit is located at the upper end of the sedimentation tank. The mixing unit is connected to the sedimentation tank and passes through both sides of the sedimentation tank. The filtering unit and the chemical application unit are respectively connected to the sedimentation tank and the moving unit. The filtering unit performs preliminary treatment on the wastewater and removes large particulate impurities, improving the wastewater treatment quality. Secondly, the chemical tank in the chemical application unit is separated from the moving unit and connected only to the moving unit via a chemical application plate, reducing the load on the moving unit. This allows the moving unit to remove impurities filtered by the filtering unit under low load conditions. Simultaneously, the mixing unit ensures rapid and uniform mixing of the chemical solution and wastewater, thereby improving the wastewater treatment quality and practicality of the chemical application device.

The invention relates to a method for rapidly dissolving ferroniobium, which comprises the following steps: after ferroniobium is weighed, hydrofluoric acid and concentrated nitric acid are sequentially added to clarify the solution, and the purpose of adding hydrofluoric acid is that niobium is extremely easy to be hydrolyzed and precipitated, but Nb in a hydrofluoric acid system can exist in a stable soluble complex form; in the test, boric acid is added to mask F ions, and tartaric acid is added to inhibit Nb hydrolysis; in the dissolving process of ferroniobium, tartaric acid and boric acid must be added firstly, otherwise, the solution is directly turbid, and the experiment fails. In the ferroniobium dissolution process, Nb hydrolysis can be inhibited to generate niobic acid precipitates, F ions can be masked, the ferroniobium solution can be rapidly dissolved and clear, and the purpose of complete dissolution is achieved. Operation is simple, and dissolution is fast.

The utility model discloses a full-automatic precise fertilizing device which is used in cooperation with a seedling shooting machine and comprises a fertilizer storage bin and a plurality of fertilizing pipes arranged vertically, the fertilizing pipes are arranged on one side of a seedling shooting pipe of the seedling shooting machine, and fertilizer outlets of the fertilizing pipes are close to seedling outlets of the seedling shooting pipe. The top of each fertilizing pipe is connected with a fertilizer storage bin, a switch is arranged between each fertilizing pipe and the fertilizer storage bin, and a fertilizer acceleration beating structure is arranged at the bottom of each fertilizing pipe and comprises a rotating shaft, a plurality of fertilizer hoppers arranged on the peripheral wall of the rotating shaft and a power source driving the rotating shaft to rotate. Fertilizer in the fertilizer storage bin falls into the fertilizer hopper along the fertilization pipe, and after the power source drives the fertilizer hopper to rotate in an accelerated mode, the fertilizer in the fertilizer hopper is driven into the field. The fertilizer applicator has the advantages that fertilizer is injected into soil in an accelerated manner and is aligned to roots of seedlings, the roots of the seedlings can absorb the fertilizer, and accurate fertilization is realized.

The utility model discloses a microorganism dissolved oxygen synergistic stirring device with high stirring efficiency, which belongs to the technical field of stirring devices and comprises a fermentation tank, a stirring motor is bolted to the top of the fermentation tank, a stirring shaft is fixedly connected to the output end of the stirring motor, two stirring impellers are bolted to the stirring shaft, and the stirring impeller is fixedly connected to the output end of the stirring motor. The stirring motor, the stirring shaft and the stirring impeller are arranged, microorganisms in the fermentation tank can be stirred, oxygen can be conveyed to the bottom of the fermentation tank through cooperation of the oxygen supply pump, the connecting pipe, the rotating sleeve, the aeration pipe and the aeration holes, and the microorganisms in the fermentation tank can be stirred. The microorganisms are in full contact with oxygen in the stirring process, so that the contact amount of the oxygen and the microorganisms is increased, the oxygen is quickly dissolved in the microorganisms, and the content of dissolved oxygen in the microorganisms is increased.

The invention relates to the field of preparation of catalysts, and discloses a nickel-based catalyst, a preparation method and application thereof, and a method for synthesizing ammonia. The preparation method of the nickel-based catalyst comprises the following steps that (1) an alloy containing Ni, Al and auxiliary metal is provided, and the auxiliary metal is selected from at least one of VA group metal elements, transition metal elements except for IVB and VB groups and lanthanide series metal elements; (2) grinding the alloy to obtain alloy powder; (3) in the presence of alkali liquor, the alloy powder is subjected to dealumination treatment; and (4) in the presence of a solvent, aging a product obtained by dealumination treatment in the step (3) and a catalyst carrier. According to the invention, non-noble metal Ni is used as a main active component of the catalyst, a catalyst formula and a reaction route are optimized, water is used as a reaction solvent, so that generated ammonia can be rapidly dissolved, and meanwhile, a complete mixed flow reaction mode is adopted, so that efficient catalytic synthesis of ammonia at low temperature and low pressure is realized.