4results about How to "Improve fluidization quality" patented technology

The invention relates to a stirring type particle circulation coupling reactor, a fluidized bed and a particle circulation coupling method, the fluidized bed comprises a reactor, a solid recovery device and a storage tank, a stirring structure is introduced into the reactor, and horizontal shearing force generated by stirring is used for crushing large-size particle agglomerates to prevent hardening of micro-nano particles; meanwhile, the circular flow of the gas medium provides a vertical acting force for the particles, and the coalescence behavior of the gas phase and the solid phase in the reactor is reduced, so that the problem that the micro-nano particles are blocked in the annular space area of the reactor is solved, the fluidization quality is improved, and the circular continuous treatment of the micro-nano particles is realized; the fluidized bed utilizes the built-in guide cylinder to realize circulation, and the circulation direction can be a central airlift type or a central descending type by adjusting the gas flow rate ratio of the guide cylinder to the annular gap area, so that the circulation flow of particles is enhanced, and the fluidization quality of the particles at the bottom of the circulation section is improved.

The invention discloses a method for co-processing chromium-containing aluminum mud and electrolytic aluminum overhaul slag, which comprises the following steps of: oxidizing cyanide in the finely ground overhaul slag into carbon dioxide and nitrogen by using hexavalent chromium with strong oxidizing property in the chromium-containing aluminum mud under an acidic condition, and adding calcium oxide into decyanated slag to obtain trivalent chromium precipitate and insoluble villiaumite; and chloridizing the washed and dried precipitation slag by adopting aluminum chloride, carrying out multi-stage condensation separation and purification on the chloridized flue gas to respectively obtain ferric trichloride and aluminum trichloride, carrying out heat exchange and washing on the chloridized slag to obtain a chromium trichloride solution, and carrying out alkaline leaching to obtain sodium aluminate and tailings. According to the method, oxidation-reduction characteristics of the chromium-containing aluminum mud and the overhaul slag are utilized to cooperate with detoxification, a carbon-based wave-absorbing material in the overhaul slag is subjected to microwave heating for chlorination recovery of valuable elements, the heating rate is high, heating is uniform, the reaction efficiency is high, harmless treatment of the two hazardous wastes is achieved, the valuable elements such as chromium and aluminum in the hazardous wastes are effectively recovered, and the method is suitable for industrial production. And the energy utilization rate is high.

The invention relates to the technical field of fluidized beds, in particular to a fluidization coating device with pulse, stirring and double-particle triple synergy, which comprises a spray fluidized bed reactor, a fluidized bed reactor, a stirring device and a double-particle fluidized bed reactor, the gas distributor is positioned above the carrier gas inlet and is used for uniformly distributing carrier gas entering from the carrier gas inlet on the whole bed layer to form fluidized gas; the gas-liquid two-phase flow nozzle is connected with the gas supply unit and the coating liquid conveying tank and is used for atomizing the coating liquid into micron-sized small liquid drops and then spraying the micron-sized small liquid drops into the spray fluidized bed reactor; the mechanical shearing unit continuously generates local mechanical crushing on the aggregate; the pulse air inlet device is connected with the air supply unit and is used for applying periodic pulse airflow to the fluidized bed layer and breaking particle aggregation and channeling formed during initial fluidization; and the flow aiding particles and the fine powder particles to be coated jointly form a double-particle fluidization system. The problems of difficult fluidization starting, non-uniform fluidization and the like of ultrafine powder particles are solved through triple synergy of pulse, stirring and double particles.

The present application relates to the technical field of fluidized reaction, and discloses a fluidized bed reactor, application and a method for preparing trichlorosilane through cold hydrogenation reaction, wherein a first gas distributor is arranged in the reaction cavity of the fluidized bed reactor, a gas feeding section is formed between the first gas distributor and the bottom of the reaction cavity, an annular plate is arranged at the bottom of the reaction cavity and extends to the first gas distributor so as to separate the gas feeding section into a central chamber formed around the annular plate and an annular chamber located between the annular plate and the cavity wall of the reaction cavity, a second gas distributor is arranged in the central chamber, and a third gas distributor is arranged in the annular chamber. The present application has the advantages of improving the overall fluidization quality of the bed layer and the utilization rate of raw materials.