12results about How to "Reduce stirring speed" patented technology

The invention provides a large-particle narrow-span distribution ternary precursor and a preparation method and application thereof, and belongs to the technical field of batteries, the preparation method comprises the following steps: ammonia concentration in a base solution A is 2.0-5.0 g / L, a nickel-cobalt-manganese metal salt solution, ammonia water and an alkali solution are introduced into the base solution A in a parallel flow manner, a first coprecipitation reaction is carried out, and a nickel-cobalt-manganese ternary precursor seed crystal is prepared; in the first coprecipitation reaction, the stirring rotating speed is 150 to 350rpm; a base solution B is prepared, the ammonia concentration in the base solution B is 5.0-7.0 g / L, a nickel-cobalt-manganese metal salt solution, ammonia water and an alkali solution are introduced into the base solution B in a parallel flow mode, a second coprecipitation reaction is conducted, and a nickel-cobalt-manganese ternary precursor is prepared; in the second coprecipitation reaction, the stirring rotation speed is 150 to 280 rpm. The problems that nickel-cobalt-manganese ternary precursor particles are prone to cracking and agglomeration are solved, and therefore the precursor narrow in particle size distribution and good in sphericity degree is obtained.

The present application relates to the field of gas turbine technology, specifically to a sand supply device for gas turbine engine sand dust deposition experiment; including box, air intake system, air outlet system, stirring system and dust concentration measuring instrument; air intake system is arranged in the lower part of the box; the air outlet system is arranged in the upper part of the box, and the air outlet system contains height-adjustable air outlet; the input end of the air outlet is provided with an air outlet inlet flow diverter; the stirring system is installed at the bottom of the box, including servo motor, motor support and stirring impeller. According to the target particle concentration, the height of the air outlet inlet flow diverter is adjusted as the main means, and the air inlet flow and speed of the air inlet and the stirring impeller speed are fine-tuned, and through the coupling effect of the three, the high, medium and low concentration levels can be continuously adjusted, covering the engine full working condition sand dust simulation demand, solving the problem of single adjustment mode and insufficient precision of traditional device.

The utility model discloses a double-layer foundation shallow layer solidification structure, and relates to the technical field of foundation treatment. Comprising a foundation pit, the foundation pit further comprises a lower curing layer and an upper curing layer, a bonding interface layer is arranged between the lower curing layer and the upper curing layer, a soft soil layer is arranged at the bottom of the foundation pit, a plurality of piles are embedded in the foundation pit, and the piles are vertically and horizontally arranged and embedded in the soft soil layer. The lower curing layer is located above the soft soil layer, and the upper curing layer is located above the lower curing layer; a synergistic stress system is formed through the double-layer foundation with the high-strength impermeability of the upper curing layer and the flexible bearing of the lower curing layer, the bearing capacity and stability of the foundation are effectively improved, sedimentation is reduced, the utilization rate of waste residues is increased, the material cost is effectively reduced, the structure is more environmentally friendly and saves energy, and the structure is particularly suitable for treatment of soft foundations and has good application prospects. Such unfavorable geological conditions as sludge and mucky soil.

The invention discloses a method for flocculating and purifying tea saponin by using a microbial flocculant, which comprises the following steps: mixing a tea saponin crude extract with water, stirring, standing, removing grease, retaining an aqueous solution, mixing with a coagulant aid solution and a microbial flocculant solution, flocculating, standing, retaining a supernatant, and completing the flocculation and purification of the tea saponin. According to the method disclosed by the invention, the residual oil in the tea saponin crude extract is removed, so that the subsequent flocculation purification effect can be improved, the grease content in the tea saponin product can be reduced, and other impurities in the tea saponin crude extract can be quickly and greatly removed by optimizing the flocculation process under the combined action of the coagulant aid and the microbial flocculant; and flocculant residues and toxicity risks are reduced, so that a liquid tea saponin product with high yield and high purity is obtained. The method also has the advantages of simple and convenient operation, safety, environmental protection and the like, is suitable for large-scale preparation of tea saponin, and is convenient for industrial application.

The utility model discloses a toluenesulfonamide formaldehyde resin standing device with sealing assembly, including the fixed frame, the inside intermediate penetration of fixed frame is connected with the box, the top surface of box is connected with the apron, the top surface one side of apron is established with the feed pipe, the both sides symmetrical installation of apron and box has the mounting block, the inside intermediate penetration of mounting block is connected with the threaded insert bar, the both sides threaded connection of threaded insert bar has the nut, still include: the bottom surface of apron is provided with the sealing washer, wherein, the surface penetration of sealing washer is connected with a plurality of insert bars, wherein, the surface of insert bar is equipped with the return spring, and one side surface of return spring is fixedly connected with the sealing washer, through setting up insert bar, return spring, firm block and clamping groove, make the sealing washer of long time use carry out the swift replacement to reduce the maintenance cost and downtime to a certain extent.

The invention discloses a fermentation production method for enhancing epsilon-polylysine by supplementing epigallocatechin, which comprises the following steps of: carrying out fed-batch fermentation to produce epsilon-polylysine when the concentration of the supplemented epigallocatechin is 0.4-2.0 L / d; and when epigallocatechin is added, the yield of epsilon-polylysine is respectively improved by 15.9% and 35.227% at most compared with the control group. In 5L tank fed-batch fermentation, the yield of epsilon-polylysine reaches up to 42.8 g / L when fermentation is performed for 184 hours, and the yield is 5.59 g / d; meanwhile, through transcriptome, metabolome and some key enzyme activity tests, the gallocatechin can enhance the tricarboxylic acid cycle pathway activity and antioxidant activity, and provides richer raw materials and energy substances for epsilon-polylysine synthesis.

The invention discloses a method for producing IMP+GMP by anti-solvent cooling crystallization based on solvent spray concussion, raw materials IMP and GMP are added to the water of crystallization kettle, heated and stirred to completely dissolved, and pH is adjusted; Anti-solvent is added dropwise, crystal seeding is added, and the temperature is lowered; Solvent water forms a fan-shaped water mist through a shower head and sprays on the raw material liquid surface of crystallization kettle, and the solvent water consumption of a solvent spray concussion is 25% to 50% of the total solvent amount, and a spray time is controlled to be 1 to 2min, and the speed of stirring to heating and stirring is restored, and the temperature is lowered to form a solvent spray concussion; Repeat solvent spray concussion 2‑4 times; Cooling and filtering, washing, drying, and obtaining crystallized product. Product of the present invention has narrow particle size distribution, large particle diameter, and good crystal form, high yield, easy control of operating conditions, improved according to factory process, and strong operability.

The present invention belongs to the technical field of calcium phosphate preparation, in particular to a hydroxy calcium phosphate synthesis granulation device and process, comprising a reactor and a reactor cover, a heating component is arranged outside the reactor, a reaction chamber is arranged inside the reactor, a stirring component and a dosing component are arranged inside the reaction chamber, the dosing component comprises a second shaft sleeve and a rotating disk which are arranged on a stirring shaft and rotate synchronously and can move vertically, a fixed cover plate is slidably connected to the upper part of the second shaft sleeve and the rotating disk, the fixed cover plate is connected to the reactor cover through a telescopic rod, the fixed cover plate, the second shaft sleeve and the rotating disk form an annular dosing chamber, a drug solution is pumped into the dosing chamber through a first dosing pipe, and a second dosing pipe connected to the dosing chamber is arranged on the lower side of the rotating disk. The present application can effectively utilize the heat generated by the reaction, reduce the temperature difference between the slurry at the stirring shaft and the reactor wall, so that the grains generated by the reaction have a similar growth environment in the entire axial flow circulation process.

The application discloses a method for regulating growth of bacillus subtilis by using a redox electrode to produce spores, and belongs to the technical field of fermentation engineering. The method for regulating growth of bacillus subtilis by using a redox electrode to produce spores comprises the following steps: in the process of fermentation production, a redox electrode is added, and the redox potential of the bacillus subtilis fermentation liquor is controlled to be in the range of 50-350 mV. The method can make the bacillus subtilis grow and produce spores at a faster rate, significantly improve the spore yield and spore rate, and effectively improve the carbon source substrate conversion rate and air utilization rate.

The application discloses a method for recycling lithium in leaching solution of waste lithium ion battery and application thereof, and comprises the following steps: removing copper and iron aluminum from the leaching solution of the waste lithium ion battery to obtain a post-removing impurity solution; preparing a calcium sulfate solution; adding sodium fluoride, ammonium fluoride and a dispersing agent into the calcium sulfate solution; heating and reacting the obtained mixed solution; obtaining calcium-doped sodium fluoride crystals after cooling; adding the calcium-doped sodium fluoride crystals into the post-removing impurity solution; performing lithium precipitation under low-speed stirring; and performing solid-liquid separation to obtain lithium fluoride residue and post-lithium precipitation solution. The method uses calcium-doped sodium fluoride solid to precipitate lithium in the leaching solution at one time, so that the lithium in the leaching solution is enriched in the lithium fluoride residue, the recovery rate of the lithium is improved, the content of nickel, cobalt and manganese metals in the lithium fluoride residue is reduced, the difficulty in preparing battery-grade lithium carbonate from the lithium fluoride residue is reduced, and the subsequent treatment process of the nickel, cobalt and manganese metal solution is simplified.

The invention discloses a chemical conditioning device for sludge, relates to the field of sludge treatment, and solves the problems that the existing chemical conditioning device for the sludge is difficult to continuously and stably condition the sludge when in use and the mixing with powder is not uniform and efficient enough in the conditioning process, the chemical conditioning device for the sludge comprises a machine body, a conveying mechanism, a conditioning mechanism and a driving mechanism, the machine body is fixedly connected with a fixing ring, the fixing ring is fixedly connected with a feeding hopper and a discharging hopper, the conveying mechanism comprises a rotating ring, a conveying cylinder and a pushing plate, and the hardening and tempering mechanism comprises a wind power powder feeding pump, a rotating frame and a stirring pipe. Meanwhile, the linkage rotating frame drives the stirring pipe to rotate and stir, lime powder in the wind power powder feeding pump is filled into the sludge in the conveying cylinder through the side face of the stirring pipe at a set position, the uniform mixing, tempering and stirring functions are achieved, and the stirring speed can be reduced along with reduction of the water content of the sludge.

The invention belongs to the technical field of biological fermentation, and particularly relates to a submerged fermentation extraction process method of ganoderma triterpenic acid. Preparing to obtain a seed solution; preparing a fermentation culture medium, and performing two-stage submerged fermentation on the seed solution to obtain a fermentation solution; filtering and separating the fermentation liquor to obtain mycelia containing intracellular ganoderma triterpenic acid and supernate containing extracellular ganoderma triterpenic acid, drying and crushing the mycelia, and carrying out ultrasonic and enzymolysis synergistic extraction to obtain an extracting solution; mixing the supernate and the extracting solution, filtering to obtain a clear solution, and purifying, concentrating and drying the clear solution to obtain a ganoderma triterpenic acid refined product. The method solves the problem of low yield of ganoderma triterpenic acid caused by uniform mycelium growth and ganoderma triterpenic acid synthesis environment, insufficient carbon source supply and limited induction effect in traditional submerged fermentation through innovative combination of staged fermentation, a fermentation composite carbon source, a composite inducer and beta-cyclodextrin.