10results about How to "Improve fluidization" patented technology

The invention relates to the field of sewage treatment, in particular to a sewage treatment system capable of recycling sulfur based on sulfur autotrophic denitrification, which comprises a pretreatment tank, an aerobic tank, a sulfur autotrophic denitrification reactor, an anaerobic tank and a secondary sedimentation tank which are sequentially connected, and the part of the secondary sedimentation tank containing supernatant mixed liquor is communicated with the aerobic tank; the anaerobic tank contains sulfate reducing bacteria, and sulfate radicals (SO4 < 2->) in the sewage discharged from the sulfur autotrophic denitrification reactor are reduced into S < 2-> by the anaerobic tank under the action of the sulfate reducing bacteria; water containing S < 2-> in the anaerobic tank enters a secondary sedimentation tank, and supernatant mixed liquor in the secondary sedimentation tank flows back to the aerobic tank; sulfur oxidizing bacteria are contained in the aerobic tank, and S < 2-> in the liquid flowing back from the secondary sedimentation tank is oxidized into S < 0 > and S2O3 < 2-> by the aerobic tank under the action of the sulfur oxidizing bacteria. According to the scheme, the problem that more SO4 < 2-> is generated in the current sulfur autotrophic denitrification process is solved, meanwhile, the consumption of electron donors is reduced, and the cost is reduced.

The invention discloses a semi-coke tail gas chemical looping hydrogen production system which is characterized in that a first gas inlet chamber and a second gas inlet chamber are arranged in the hydrogen production system, and a reaction tube comprises a first reaction chamber and a second reaction chamber; the gas inlet of the first reaction chamber is communicated with the gas inlet of the second reaction chamber; the air outlet of the first reaction chamber is communicated with the air outlet of the second reaction chamber, so that the first reaction chamber and the second reaction chamber can supply air independently, the air speed in the first air inlet chamber is higher than that in the second reaction chamber, internal airflow circulation is effectively formed in the internal circulating fluidized bed, the reaction process is more sufficient, and the reaction efficiency is improved. The device effectively improves the hydrogen production efficiency, is simple in structure, realizes the independent air supply process through the independent design of the two cavities of the gas inlet pipe and the reaction pipe, realizes the effective circular reaction of tail gas in the reaction pipe through the control of the air speed, and improves the conversion efficiency.

The invention relates to a method for directly reducing micro-fine-particle iron powder from high-purity iron ore concentrate through hydrogen-based low-temperature fluidization, belongs to the technical field of mineral processing, and mainly relates to five stages of nitrogen replacement of air, preheating dehydration, low-temperature fluidization direct reduction, inert cooling and ore grinding screening. And fluidization direct reduction at the low temperature of 570-620 DEG C into metal iron powder is achieved, efficient ore grinding is conducted on the basis, and the micro-fine-particle iron powder with the particle size D50 smaller than or equal to 3 micrometers is prepared. Compared with a conventional 800-1400 DEG C high-temperature preparation process of the reduced iron powder, the energy consumption and the material consumption are greatly reduced, and meanwhile bonding and flow loss are effectively avoided. According to the technological method, H2 serves as reducing gas, fluidized roasting is adopted, and the technological method has the advantages of being simple in technological process, free of carbon emission, high in reduction efficiency and the like.

The utility model discloses a plasma processing device which comprises a cavity and a coaxial electrode assembly, a reaction chamber is arranged in the cavity, and the cavity is connected with a gas input assembly and a vacuumizing unit. The coaxial electrode assembly comprises a tubular high-voltage electrode and a grounding electrode, the high-voltage electrode is connected with a high-frequency power supply, and the grounding electrode coaxially sleeves the high-voltage electrode to form a discharge gap; the high-voltage electrode is a hollow pipe body, micropores are formed in the side wall, and the gas input assembly conveys process gas to the discharge gap through the hollow pipe body and the micropores. According to the structure, the high-voltage electrode adopts the hollow pipe body structure design, the side wall of the hollow pipe body is provided with the micropores, and process gas is directly conveyed to the discharge gap through the hollow pipe body and the micropores, so that uniform gas distribution is ensured, and the plasma generation efficiency is improved; and meanwhile, powder uniform fluidization and efficient plasma treatment are achieved. And through the rotatable design of the cavity, the powder agglomeration is further broken, and the surface treatment uniformity of the plasma on the powder is improved.

The embodiment of the invention relates to a method for improving the fluidization effect of negative electrode material particles of a secondary battery. The method comprises the following steps: giving charges to secondary battery negative electrode material powder particles; wherein the secondary battery negative electrode material powder particles are non-magnetic particles; the secondary battery negative electrode material powder particles endowed with charges are subjected to airflow stirring in a fluidized bed and are simultaneously matched with magnetic stirring, so that the secondary battery negative electrode material powder particles obtain kinetic energy dispersion through airflow; and the secondary battery negative electrode material powder particles are dispersed to form a fluidized state through the Lorentz force of the magnetic field on the secondary battery negative electrode material powder particles endowed with the charges and the electrostatic repulsive force among the powder particles with the charges with the same polarity, so that the fluidization effect of the secondary battery negative electrode material particles is improved.

The wastewater treatment system comprises a water inlet unit, a reactor, a separation unit and a circulation unit which are sequentially connected to form a closed-loop system, the water inlet unit is further connected with a chemical dosing unit, the water inlet unit is used for conveying wastewater to the reactor, and the chemical dosing unit is used for adding alkali into the wastewater to adjust the pH value and providing required magnesium ions; a fluidization reaction zone and a separation zone are arranged in the reactor, and the fluidization reaction zone promotes generation and growth of struvite particles through particle collision and aggregation; the separation zone enables generated particles to partially fall back to the fluidization reaction zone for continuous reaction through preliminary solid-liquid separation; the separation unit is used for receiving the wastewater in the separation area, further removing residual particles, and enabling the small particles to flow back to the reactor through the circulation unit for recycling. By optimizing particle generation, separation and backflow processes in wastewater treatment, formation of target large particles is promoted, resource recycling is facilitated, meanwhile, consumption of chemical agents is reduced, and cost is reduced.

The invention discloses a particle fluidization system for two-dimensional high-spatial-resolution particle tracking velocity measurement, and relates to the technical field of fluid mechanics. A tank body is of a vertically-arranged structure with the thick lower portion and the thin upper portion, the middle of the tank body is in a circular truncated cone shape, an annular air inlet pipe is fixedly arranged on the periphery of the lower portion of the circular truncated cone shape and communicated with the circular truncated cone shape through a plurality of vortex air inlet pipes, the vortex air inlet pipes are communicated with the tank body in the tangential direction, and a cleaning cover plate is detachably and fixedly connected to the lower end of the tank body. A particle flow outlet is formed in the upper end of the tank body and communicated with the inlet end of the particle spraying rod, and a particle filling port is formed in the upper end of the tank body and beside the particle flow outlet; the outlet end of the particle spray rod extends into the wind tunnel to be measured, and a plurality of hollow seams are formed in the periphery of the outlet section; the device has no large bending and complex structure, deposition and blockage of tracer particles are effectively avoided, the particle aggregation probability can be reduced through the hollowed-out seams, the measurement precision and the spatial resolution are improved, and the experiment reliability is enhanced.

The invention relates to the technical field of gas-solid phase reaction, in particular to a fluidized bed reactor and a pyrolysis method. The interior of the fluidized bed reactor comprises a dense-phase zone (1), a dilute-phase zone (2) and a gas-solid separation zone (3) from bottom to top, and a filter (4) is arranged in the gas-solid separation zone (3); the fluidized bed reactor further comprises a fine powder collecting cone (5) and a discharger (6), and the fine powder collecting cone (5) is arranged in the gas-solid separation area (3) and used for collecting fine powder separated by the filter (4); and the discharger (6) is connected with the fine powder collecting cone (5), is arranged outside the fluidized bed reactor and is used for discharging the fine powder in the fine powder collecting cone (5) out of the fluidized bed reactor. According to the fluidized bed reactor disclosed by the invention, fine powder separated by the filter can be efficiently discharged out of the fluidized bed reactor, so that the content of the fine powder in the fluidized bed reactor can be remarkably reduced, stable operation of a bed layer is ensured, and the fluidization effect is improved.

The utility model discloses a fluidized bed drying granulator, include: main unit, it includes fluidized cylinder, the fluidized cylinder front fixedly seted has handle, set up in the granulating unit of main unit inside, it includes granulating part and the adjusting part of being located at its top surface, the granulating unit is used for the drying granulating operation of material, set up in the sealing unit of main unit top surface, it includes the rotating part and the sealing part of being located at its inside, the sealing unit still includes temperature control assembly, the sealing unit is used for the sealing processing of fluidized cylinder processing. The utility model discloses through being provided with the cooperation work of granulating part and adjusting part, makes in the fluidized bed drying granulating work, will fluidized bed divide into primary fluidization area and secondary fluidization area, controls the fluidization intensity of different area through the stepped air distribution board, the bottom is inclined perforated plate, enhances the fluidization of big particle, the upper part is fine mesh plate, stabilizes fine particle suspension, has improved granulating effect and work efficiency greatly.

The application relates to the field of silicon substrate production equipment, in particular to a reactor for producing advanced silicon-based materials, which comprises a reactor main body, a stirring device and a heating device; the stirring device comprises a stirring shaft, stirring blades and a driving mechanism; the stirring shaft is rotationally arranged in the reactor main body; the stirring blades are fixedly connected with the stirring shaft; the driving mechanism is in transmission connection with the stirring shaft; the heating device comprises a microwave generator and an electric resistance heater; the microwave generator is arranged outside the reactor main body; and the electric resistance heater is arranged on the stirring shaft. The heating mode of combining microwave heating and heating rods is adopted to realize uniform heating of the materials. In addition, the reactor is provided with high-efficiency stirring devices, which can obviously adjust and improve the mixing speed, uniformity and heat transfer of the materials, can effectively avoid the phenomena of channeling, slugging and dead bed, and can obtain a uniform fluidized state.