6results about How to "Reduce stirring speed" patented technology

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 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 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 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.