33results about How to "Improve desulfurization reaction efficiency" patented technology

The present invention relates to external grain re-circulating technology in large circular fluidizing dry fume desulfurizing system. The desulfurizing process includes preparing desulfurizing agent, desulfurizing reaction inside the desulfurizing reaction tower and external desulfurizing agent grain separation and re-circulation. In the external grain re-circulation, the returned material is two-stage separated and re-circulated, the grains separated by the first stage and the second stage desulfurizing agent grain separator are fed to the fluidizing region in the lower part of the desulfurizing reaction tower separately through different re-circulation inlets, resulting in raised desulfurizing agent grain utilization and desulfurizing reaction efficiency. Compared with available technology, the present invention has much higher fume dedusting efficiency, high desulfurizing efficiency up to 92 % at Ca/S of 1.1-1.3, less adhesion and blocking in the lower desulfurizing tower part and lowered load of the desulfurizing agent grain separator.

The invention discloses a molten iron pure spray particle magnesium desulfurization spray gun with a vaporizing chamber in a spearhead. The molten iron pure spray particle magnesium desulfurization spray gun comprises a connecting flange, a gun-barrel and a spearhead blowing vaporizing chamber, which are sequentially connected and communicated with each other, wherein the spearhead blowing vaporizing chamber is sequentially composed of a vaporizing chamber bell jar, an anchoring part group and a refractory castable lining from inside to outside; a bottom skirt is arranged at the lower end of the vaporizing chamber bell jar; and a plurality of air outlets are evenly formed in the bottom skirt in an emission shape. The method comprises the following steps: selecting a metal material to process and fabricate each component of the spray gun and removing rust for later use according to structural parameters of the spray gun; sequentially preparing a gun core and the vaporizing chamber bell jar; connecting the gun core and the vaporizing chamber bell jar by welding; and welding a reinforcing rib plate in a gap among the lower end of the gun core, the top of the vaporizing chamber bell jar and the refractory castable lining; and finally welding the anchoring part group, and pouring to obtain the spray gun. Compared with a conventional vaporizing chamber spray gun, the molten iron pure spray particle magnesium desulfurization spray gun disclosed by the invention has the advantages of being simple in structure, stable to blow, low in cost, efficient in desulfurization, long in service life and the like.

The present invention provides a dry flue gas desulfurizing process with independent feeding, feeding back and water-spraying device. It includes desulfurizing agent preparation digestion system, desulfurizing reaction tower and desulfurizing reaction system and exterior desulfurizing granules separation and recirculating system. The water-spraying atomization device of desulfurizing reaction tower, desulfurizing agent feeding device and granules recirculating feed back device are independently placed, and the different heights of the desulfurizing reaction tower are equipped with respective nozzles, so that the structure can raise the utilization rate of the desulfurizing agent and can raise the desulfurizing effect.

The invention discloses flue gas desulfurization and dust removal equipment of a low-temperature circulating fluidized bed. The equipment comprises a desulfurization reaction tower, a dedusting unit and a material returning unit, the equipment is internally provided with a heat exchange module, wherein the heat exchange module comprises a hot wall device; the hot wall device comprises at least one group of heating screens and at least one group of heat preservation layers, the heating screens comprise channels the ports of which are open for assisting a heating medium in circulating, the hot wall device is covered on heat dissipation wall surfaces of the desulfurization reaction tower and the dedusting unit, and the heating screens are positioned among the heat preservation layers and heat dissipation wall surfaces covered on the hot wall device. The flue gas desulfurization and dust removal equipment provided by the invention has the advantages that the worries of moisture condensation, scale formation and pasting bag of the desulfurization reaction tower and the dedusting unit are eliminated, the desulfurization adiabatic saturation temperature difference is controlled within 15 DEG C-5 DEG C, the desulfurization reaction efficiency is higher than 95% or even 99% under the condition that the molar ratio (Ca/S) of a calcium element and a sulfur element is less than 1.3, and the operational reliability of the equipment is still guaranteed.

The invention discloses a lime slurry jetting circulating fluid bed semi-dry process desulfurizer which comprises a desulfurization reaction column, a gas-solid separator and a draught fan, wherein the lower part of the desulfurization reaction column is provided with a lime slurry nozzle and a fume inlet; an after-reaction gas outlet of the desulfurization reaction column is communicated with the gas-solid separator through a spoiler; and the spoiler is positioned on the upper part of the after-reaction gas outlet of the desulfurization reaction column. In the invention, the upper part of the gas outlet of the desulfurization reaction column is provided with the spoiler which can forcibly mix the gas-solid mixture discharged by the desulfurization reaction into a turbulent condition, thereby strengthening the desulfurization reaction of the mixture; and meanwhile, part of unreacted slurry particles return to the desulfurization reaction column for reaction after colliding with each other in the spoiler, thereby enhancing the desulfurization efficiency. The desulfurizer can reduce the working load of the gas-solid separator under the condition of high fume flow on the premise of ensuring the separating effect, and is applicable to high-flow fume desulfurization. When the fume flow is low, the turbulence is strengthened by the spoiler, thereby prolonging the contact reaction time and enhancing the desulfurization efficiency.

The invention relates to a mechanical stirring, blowing and desulfurizing stirrer for metallurgy. The mechanical stirring, blowing and desulfurizing stirrer comprises a stirring shaft and a stirring head connected to the lower portion of the stirring shaft, wherein a plurality of stirring blades are arranged on the outer side of the stirring head in the circumferential direction, and the included angles between the adjacent stirring blades are the same; a straight-through air blowing channel is formed in the stirring shaft, obliquely downward flow dividing pipelines are arranged in part of or all the stirring blades, and each flow dividing pipeline communicates with the straight-through air blowing channel to form an air blowing channel; and a blowing opening is formed at the tail of each flow dividing pipeline. Desulfurizing agent blowing holes are formed in the outermost edge wall surfaces of the symmetrical stirring blades, and a certain distance is formed between a bubble generation position and a central vortex region, so that the bubble aggregation of a desulfurizing agent can be reduced, the bubble growth probability can be reduced, the gas-liquid reaction area can be increased, the gas-liquid reaction time can be prolonged, and the desulfurization reaction efficiency can be improved.

The invention relates to a molten iron desulfurizing method and a desulfurizing device thereof. The molten iron desulfurizing method includes pouring processing molten iron into an inner cavity of a desulfurizing device; adding a lime and fluorite compound desulfurizer constantly; blowing argon to stir the molten iron through an air inlet of the desulfurizing device, and removing sulfur in the molten iron; and discharging desulfurizing slag constantly from a slag discharging groove, and discharging the desulfurized molten iron through an iron discharging nozzle, wherein the S content in the desulfurized molten iron is 0.041 to 0.057. The desulfurizing device is provided with a tank casing with trunnion iron, and is characterized in that the iron discharging nozzle which inclines upward is arranged on the tank casing, the slag discharging groove which inclines from top to down is arranged at a position opposite to the iron discharging nozzle, fireproofing linings are arranged in the tank casing, the iron discharging nozzle and the slag discharging groove, an air inlet is arranged at the bottom, and the slag discharging groove at the upper end of the slag discharging groove is higher or 20cm higher than the front end of the iron discharging nozzle. According to the molten iron desulfurizing method and the desulfurizing device thereof, molten iron desulfurizing efficiency is improved, and the amount of the desulfurized molten iron can reach 15-25t/h.

The invention discloses a petroleum coke desulfurization method which comprises the following steps: firstly, mixing a petroleum coke raw material with an alkali metal compound, and carrying out heat treatment to obtain pretreated petroleum coke A; further treating with a solvent to obtain pretreated petroleum coke B; treating the pretreated petroleum coke B and nitrogen oxide-containing gas to obtain pretreated petroleum coke C; and separating, washing and drying a pyrolysis material obtained by pyrolyzing the pretreated petroleum coke C to obtain a petroleum coke product. The petroleum coke desulfurization method provided by the invention can effectively reduce the mass transfer resistance of the reaction and improve the efficiency of the desulfurization reaction.

The invention belongs to the field of seawater desulfurization technologies and particularly discloses a high-efficiency ship seawater desulfurization device. The device comprises a reaction tower, anexhaust pipe, a water inlet pipe, a smoke inlet and a drainage port, wherein through grooves are formed in the upper surface and the lower surface of the reaction tower respectively, the through groove at the upper side is connected with a gas collection cover through screws, the volume of the reaction tower is expanded, a larger reaction space is provided, the desulfurization reaction efficiencyof smoke and seawater is improved, and therefore smoke desulfurization can be quickly performed; through cooperation of a driving rotary shaft, a strut and a mixing impeller, the seawater and the smoke can be quickly stirred and mixed to be in full contact under the action of the rotating mixing impeller, and therefore the desulfurization effect is improved; and through an intelligent working mode of a sulfur content sensor, a main control module, a power regulator and a suction motor, the amount of entering seawater can be controlled in a feedback control mode, and therefore the functions ofguaranteeing the desulfurization effect and lowering energy consumption can be achieved.

The invention relates to the technical field of sewage treatment, and discloses desulfurization equipment for industrial sewage treatment and a desulfurization method.The conveying mechanism comprises a conveying pipeline, a threaded groove is formed in the inner wall of the conveying pipeline, and a motor protection cabin is fixedly connected to the outer wall of one end of the conveying pipeline; the conveying mechanism comprises a motor protection cabin, a micro motor is fixedly connected into the motor protection cabin, a rotating gear is fixedly connected to one end of the micro motor, a gear ring body is movably connected to the rotating gear, and a conveying shaft is fixedly connected to the inner wall of the gear ring body. According to the sewage treatment device, a motor protection cabin is arranged, so that a power supply device is protected, a micro motor is arranged, so that rotating force is supplied, a rotating gear and a gear ring body are arranged, so that the rotating force is transmitted, and a transmission shaft and a transmission threaded block are arranged, so that sewage is transmitted.

The invention provides a sintering flue gas desulfurization system and a sintering flue gas desulfurization method. The system comprises a slaked lime slurry supply device, an air supply device, a water storage tank, a three-fluid spray gun, a desulfurization tower, a dust removal device and a flue inlet pipeline, wherein the slaked lime slurry supply device is communicated with the three-fluid spray gun, the air supply device is communicated with the three-fluid spray gun, the water storage tank is communicated with the three-fluid spray gun through a liquid conveying pump, a flue gas inlet and a flue gas outlet are formed in the bottom of the desulfurization tower, a venturi tube is communicated below the flue gas inlet of the desulfurization tower, and is communicated with the flue inlet pipeline, and the nozzle of the three-fluid spray gun is arranged on the flue inlet pipeline below the venturi tube. According to the invention, the sintering flue gas desulfurization method appliesthe sintering flue gas desulfurization system, the sintering flue gas desulfurization system combines the advantages of a wet desulfurization method and a semi-dry desulfurization method, operation is flexible and reliable, the flue gas load application range is wide, corrosion and white smoke are avoided, and the desulfurization efficiency can reach 95-99%.