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

The invention relates to a mechanical stirring and spraying desulfurization stirrer for metallurgy, which comprises a stirring shaft and a stirring head connected under the stirring shaft; The included angles are the same; a straight-through air blowing channel is arranged on the stirring shaft, and some or all of the stirring blades are provided with a slanted downward shunt pipe, and each shunt pipe is connected with the straight-through air blowing channel to form a blowing gas channel; each The end of the shunt pipe forms a blowing port. In the present invention, the desulfurizing agent injection hole is arranged on the outermost wall of the symmetrical stirring blade, and the bubble generating position has a certain distance from the central vortex area, which can reduce the desulfurizing agent bubble aggregation and reduce the probability of bubble growth, so as to increase the gas-liquid The reaction area is increased, the gas-liquid reaction time is prolonged, and the efficiency of the desulfurization reaction is increased.

The invention belongs to the technical field of smelting slag treatment and disposal, and discloses a treatment method for carbonation and desulfurization of steelmaking refining slag. The invention accelerates hydration before refining slag carbonation through hydrothermal pretreatment or ultrasonic pretreatment, so that alumina Calcium becomes flaky calcium aluminate hydrate, increasing the calcium aluminate and CO 2 The reaction area avoids the formation of calcium carbonate or hydrated calcium aluminocarbonate film, which improves the reaction rate. In addition, the activity of calcium silicate is stimulated by ultrasonic treatment, and the interaction between calcium silicate and CO is improved. 2 reaction speed. The invention uses hydrothermal pretreatment for carbonation, and the desulfurization efficiency is increased by more than 20% compared with direct carbonation without pretreatment, and the desulfurization efficiency is increased by more than 30% with ultrasonic pretreatment than direct carbonation without pretreatment. The invention can significantly improve the efficiency of the carbonation desulfurization reaction, speed up the reaction speed, and has a relatively simple process, which can be directly carried out at normal temperature and pressure.

The invention relates to a compound internal member applied to a circulating fluidized bed desulfuration reactor. The compound internal member comprises at least one internal member unit, wherein the internal member unit comprises an opening type funnel and an air distribution plate, a plurality of bar-shaped holes are formed in the side wall of the opening type funnel and are alternatively arranged in an upper row and a lower row, the air distribution plate is provided with at least two rows of fan-shaped holes along the radial direction, two adjacent rows of fan-shaped holes are arranged in a staggered manner, and the opening type funnel and the air distribution plate are connected through a support column. The compound internal member is capable of improving axial and radial distribution of a granular speed, increasing the granule backmixing and improving the fluidization quality of a fluidized bed, thereby increasing the utilization rate of a desulfurizing agent and the desulfuration reaction efficiency.

The invention proposes a dry flue gas desulfurization reaction tower with a variable structure, which includes a flue gas mixing chamber at the bottom of the desulfurization tower, a flue gas injection device, a fluidization section in the lower part of the desulfurization tower, a main reaction section in the middle of the desulfurization tower, and a desulfurization tower. The upper section of the upper section and the inlet of fresh desulfurizer particles on the tower body, the inlet of external recirculating particles, the atomized water nozzle, and the flue gas outlet, the main reaction section in the middle of the desulfurization tower and / or the upper section of the desulfurization tower adopts a variant structure. The main reaction zone in the middle of the desulfurization tower is composed of several sub-sections of the desulfurization tower with variable structures. The shape of the outlet section of each subsection of the desulfurization tower is different from the shape of the inlet section, and the outlet of the next section is the inlet of the previous section; the main reaction zone in the middle of the desulfurization tower The outlet cross-sectional area of ​​each desulfurization tower subsection is 1.1 to 1.5 times the inlet cross-sectional area.

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 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 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.