8results about How to "Improve fluidity" patented technology

The invention discloses a method for continuously preparing a chiral enriched single-walled carbon nanotube by adopting a fluidized bed, and belongs to the technical field of carbon nanotubes. The method comprises the following steps: preparing a fluidized catalyst by a sol-gel method, mixing a metal catalyst salt, an inorganic sol carrier, a pore-forming template agent and an electrolyte gel to form gel, and drying and annealing to form the fluidized catalyst with the particle size of 50-200 microns and rich mesopores; the method comprises the following steps: reducing and activating a catalyst in a pretreatment reactor, introducing into a main reactor, introducing a carbon source gas and a carrier gas, and cracking and depositing a carbon source at an active center of the catalyst to grow a single-walled carbon nanotube; after the growth is finished, increasing the carrier gas flow and conveying a product to a cooling separator for collection; and after the main reactor is empty, the next batch of catalyst can be introduced without cooling to realize continuous preparation. According to the method, the catalyst metal is uniformly dispersed, the fluidization performance is excellent, the growth of multi-wall and large-diameter carbon nanotubes can be effectively inhibited, and the efficient and continuous preparation of the chiral enriched single-wall carbon nanotubes is realized.

The invention relates to the technical field of expanded ammonium nitrate explosives, in particular to a preparation method of a high-free-flowing liquid-mixed expanded ammonium nitrate explosive, which comprises the following steps: adding porous granular ammonium nitrate accounting for 15-25% of the weight of a liquid-mixed ammonium nitrate base material into the liquid-mixed ammonium nitrate base material prepared after expanded crystallization; the preparation method of the porous granular ammonium nitrate comprises the following steps: preparing rice husk charcoal from rice husks in an inert atmosphere, dispersing the rice husk charcoal in ethanol, adding tetraethoxysilane, adjusting the pH value, and filtering, washing and drying after the reaction is completed to obtain a charcoal-silicon composite carrier; adding a nonionic surfactant and a silane coupling agent to pre-treat the ammonium nitrate feed liquid; adding a carbon-silicon composite carrier into the pretreated ammonium nitrate feed liquid, preserving heat, and uniformly stirring to obtain premixed liquid; and finally, carrying out spray drying to obtain the porous granular ammonium nitrate. The prepared expanded ammonium nitrate explosive has good free-running property and moisture absorption resistance, and is safe and reliable in explosion performance.

This invention discloses a gas-phase steady-state distribution device for flotation machines used in oilfield produced water treatment, comprising a water distribution main pipe, a slag scraper, an inclined plate, and a sludge scraper installed inside the flotation machine casing; a release device is provided at the inlet of the water distribution main pipe, and a water distribution branch pipe is connected to the water distribution main pipe, which in turn is connected to a water distribution branch pipe, which is also connected to a second release device; the outer wall of the flotation machine casing has a slag discharge port, a sludge discharge port, and a water outlet; the flotation machine inner cavity, a reflux pump, a dissolved air tank, and the first release device are connected in sequence. The beneficial effects of this invention are: improved gas-phase rising flow pattern, enhanced ability of bubbles to carry oil droplets and impurities, resulting in effluent water quality meeting design requirements, significantly improved treatment efficiency, and a substantial reduction in residence time and equipment size.

This invention discloses a method for purifying 2,5-furandicarboxylic acid (FDCA), belonging to the field of chemical technology. The purification method includes the following steps: crude 2,5-furandicarboxylic acid is subjected to alkali dissolution, oxidation, acidification, stirring, pulping, washing, and drying to obtain pure 2,5-furandicarboxylic acid. In the acidification crystallization process and the pulping and washing process, by selecting appropriate conditions such as the acidification reaction temperature, the oxygen content of the oxidation gas, the pulping and washing temperature, and the pulping and washing time, the purity of the obtained FDCA can reach 99.99%. Moreover, no organic solvents are used, meeting the requirements of polymerization-grade products. Furthermore, and more importantly, the FDCA product obtained by this invention has excellent particle characteristics, high flowability, and high bulk density, which is highly beneficial for downstream polymerization reactions and also facilitates the packaging and transportation of the FDCA product.

The invention provides a method for tinning a Kovar carrier without a soldering flux and a ring isolator, and relates to the technical field of microwave device processing. The method for tinning the Kovar carrier without the soldering flux comprises the steps that a ceramic wafer, a tinning solder piece without the soldering flux and a device to be subjected to gold removal and tinning are sequentially placed in a tinning jig, a tinning pressing block is placed above the device to be subjected to gold removal and tinning, and an assembly part to be subjected to gold removal and tinning is assembled; the assembly part to be subjected to gold removal and tinning is placed in a vacuum sintering furnace and vacuumized, and a cavity of the vacuum sintering furnace is filled with formic acid gas so that the tinning jig can be located in the formic acid atmosphere; the vacuum sintering furnace is heated to a preset temperature, so that the formic acid reacts with the interface to be tinned of the device, and the tinned solder sheet is completely molten; and the temperature in the vacuum sintering furnace is reduced, formic acid is discharged, and a gold-removed tin-coated device is obtained. The gold removing and tin coating method provided by the invention can be used for reducing the yield loss and carrying out batch production.

The utility model relates to the technical field of anti-corrosion, and discloses an orifice plate flowmeter anti-corrosion treatment device which comprises a throttling orifice ring, the inner wall of the throttling orifice ring is fixedly connected with two first motors, the driving ends of the first motors are fixedly connected with gears, the inner wall of the throttling orifice ring is connected with two racks in a sliding mode, and the two racks are fixedly connected with the inner wall of the throttling orifice ring. The outer portion of the gear is in meshed connection with the outer portion of the rack, a supporting disc is fixedly connected to the left side of the rack, a supporting column is fixedly connected to the left side of the supporting disc, a first limiting cone is fixedly connected to the left side of the supporting column, and a second limiting cone is slidably connected to the outer wall of the supporting column. The left side of the throttling hole ring is detachably connected with an anti-corrosion ring. According to the device, the anti-corrosion ring can be automatically and rapidly disassembled and assembled, replacement can be completed without professional tools, the maintenance efficiency is remarkably improved, the labor cost is reduced, the fixing reliability of the anti-corrosion ring is improved, and the service life of equipment is effectively prolonged.

The present application relates to the technical field of black and odorous water treatment, and discloses a black and odorous water treatment and restoration device, which comprises a bearing frame, an electrochemical treatment module arranged below the bearing frame, and a general control module arranged above the bearing frame; the electrochemical treatment module comprises a horizontal frame body, flexible electrode sheets, inner support plates and an adjusting function module; the horizontal frame bodies are arranged in an array on one side of the bearing frame immersed in water; each horizontal frame body is provided with an inner support plate arranged in an array below; the flexible electrode sheets are sleeved outside the inner support plates in the same group and are electrically connected to the general control module through wires; the inner support plates are driven to swing by the adjusting function module, the flexible electrode sheets are pushed and jacked outward from the inside by the inner support plates, and the flexible electrode sheets are subjected to periodic bending deformation.

The utility model discloses a gate equipment for hydraulic engineering, including gate and the gate pier that cooperates with gate. The gate includes gate leaf structure, lifting lug structure, cantilever roller and water stop device, and the lifting lug structure is established at the back of gate leaf structure bottom, and the cantilever roller is arranged in the side beam both sides of gate leaf structure, and the water stop device is attached on the gate. The gate pier is equipped with a door groove that cooperates with cantilever roller, and the main rail straight rail and the reverse rail straight rail that are matched with cantilever roller respectively. The upper portion of connecting reverse rail straight rail is further equipped with reverse rail arc rail, and the vertical direction height of reverse rail arc rail is lower than the main rail straight rail. The utility model discloses the forward inclination lift-lie type gate that leans down to the upstream, and the following advantages have compared to lift-lie type gate, the steel wire rope and the movable pulley of gate hoist equipment are not in the water, and the life is long. The gate water stop device is simple, and the rubber friction is small, and the hoist machine capacity is small, and the high altitude falling object is not produced. The gate unilateral multiple support arrangement is arranged, and the water pressure of bearing is not limited, and the large area orifice can be closed.