62results about How to "Promote desulfurization reaction" patented technology

The invention discloses a high-efficiency compound desulfurizing agent, relating to the ladle desulphurization accessory field. In the existing ladle desulphurization, the uniserial desulfurizing agent is uniformly adopted, with narrower function, and non-agreeable desulphurization effect. Aiming at the condition that small and medium-sized steel mills do not have liquid iron pretreatment systems or desulphurization stations, and do not have powder spraying desulphurization devices, the desulfurizing agent of the invention adopts ingredient with multi-components, namely, the compound desulfurizing agent consisting of limestone, calcined soda, fluorite, calcium carbide, magnesium powder and caustic-calcined magnesite, with the weight proportion of 40 to 50, 10 to 20, 5 to 15, 10 to 20, 4 to 6 and 5 to 15 sequentially. The desulfurizing agent has the following advantages that: 1. the integral desulphurization capability is strong, and the sulfur content can be reduced to 20ppm; 2. sulfur substance can be contained, and resulfurization phenomenon can not be generated; 3. the desulfurizing agent can be directly poured, and equipment and investment are not needed to be increased; and 4. the desulphurization speed is high.

A closely coherent tower system for selective desulfurizing is composed of a desulfurizing system A and a non-desulfurizing system B, which serve a single sintering motion at same time. Said desulfurizing system A consists of wind gathering hopper, flue valve, flue, electric duster, exhaust blower, closely coherent tower, cloth-bag duster and boosting blower. Said non-desulfurizing system B comprises flue, electric duster and exhaust blower.

The invention discloses a gasoline and diesel oil combined hydrogenation method, comprising the following steps: the raw gasoline is mixed with hydrogen, the mixture passes through a first reaction zone under the condition of gasoline hydrofining, a hydrofining catalyst is used in the first reaction zone and the raw gasoline is coker gasoline and/or fluid catalytic cracking gasoline; the reactor effluent from the first reaction zone is mixed with the raw diesel oil, the mixture passes through a second reaction zone under the condition of diesel oil hydrodearomatization, a hydrofining catalystis used in the second reaction zone and the raw diesel oil is one or more of straight-run diesel oil, coker diesel oil or fluid catalytic cracking diesel oil; and the reactor effluent from the secondreaction zone passes through a third reaction zone under the condition of diesel oil hydrodesulfurization and a hydrodesulfurization catalyst is used in the third reaction zone. The method effectively utilizes the heat emitted during secondary processing gasoline hydrogenation, is simple in process and low in energy consumption and can obtain high-quality gasoline and diesel oil products.

The invention discloses a flue gas desulphurization system and a method for flue gas desulfurization. The system comprises a flue gas desulphurization tower, an ash storage device, a gypsum preparing device and an air induction device, wherein the flue gas desulphurization tower comprises a tower body, a fume extractor, a defrosting device, a rotational flow reaction device, a gas uniformizing device and a multi-functional collecting reservoir, the fume extractor, the defrosting device, the rotational flow reaction device, the gas uniformizing device and the multi-functional collecting reservoir are communicated from top to bottom in sequence, a flue is provided with a dry powder inlet communicated with a dry powder desulfurizing agent spraying device, the multi-functional collecting reservoir is arranged under the gas uniformizing device, the rotational flow reaction device comprises a rotational flow shell and at least one rotational flow chamber provided with at least one swirler inside, each rotational flow chamber is provided with a circular reaction slurry inlet and communicated with the gas uniformizing device, and each swirler comprises an impeller shell, an impeller center shaft and at least five swirl vanes surrounding the impeller center shaft. By the adoption of the system, flue gas desulphurization effect and degree can be improved, space can be saved, a slurrying pool and a slurry precipitation pool are not needed, maintenance is convenient, cost is low, energy is saved, and environment pollution is avoided.

The invention discloses a synergistic desulfurization and denitration agent, preparation and application thereof. The synergistic desulfurization and denitration agent is prepared from the following raw materials by weight: 20-30 parts of a desulfurization agent, 40-50 parts of a denitration agent, 14-25 parts of a catalyst and 0.5-1 part of a dispersion suspending agent. The synergistic desulfurization and denitration agent is based on the denitration agent and the desulfurization agent, is assisted by the catalyst and the dispersion suspending agent, does not need flue gas pre-dedusting treatment, and realizes direct desulfurization and denitration of flue gas in a high-temperature furnace. NH2 free radicals generated in situ are used as a reducing agent to realize denitration, H2O generated in the denitration process further improves the contact between the desulfurization agent and SO2, thus promoting the desulfurization reaction, the desulfurization agent component is employed toabsorb a certain amount of NO2, the two parts play a synergistic role, and remarkably improve the desulfurization and denitration rate and effect of the flue gas, the reaction process can be basicallycompleted within 2s-5s, and the concentrations of SO2 and NOx in the treated flue gas meet the ultralow emission requirement. The preparation method of the product is simple in operation, is suitablefor industrial large-scale production, and the treatment cost is low, therefore the synergistic desulfurization and denitration agent can be widely applied to flue gas purification.

A system for desulfurizing limestone in a circulating fluidized bed boiler on the basis of flow state reconstruction comprises a hearth, a conveying mechanism, a storage bin mechanism and a pipeline, wherein the conveying mechanism comprises a temporary storage bin, a mixer and a fan; a temporary storage feed port and an exhaust port are formed in the upper part of the temporary storage bin; the storage bin mechanism comprises a storage bin, a warehouse top dust collector, a through pipeline, an electric heater and a fan; the system further comprises an air separator communicated with an exhaust gas outlet of the hearth, a return feeder, an air chamber arranged at the bottom of the hearth and led into the hearth from a primary air duct, secondary air pipes distributed on the front wall and the rear wall of the hearth, an inlet valve set communicated with the secondary air pipes and used for desulfurizing limestone in the boiler, a tail flue arranged at the top of the separator, as well as a return feeder leg integrated with the separator; the inlet valve set is connected with the mixer through the pipeline; and the return feeder is connected with the bottom of the return feeder leg. The system has the advantages that the structure is simple, the separation efficiency is high, discharging is facilitated and the like.

The invention discloses a method for recycling steel-ladle hot-state casting residues by means of a converter, and belongs to the technical field of ferrous metallurgy. The problem that the casting residues and self waste heat of the casting residues cannot be effectively utilized in the prior art is solved. The method comprises the following steps that the hot-state casting residues remaining inthe steel ladle after molten steel pouring are returned to the converter steelmaking process for recycling and utilization, and the alkalinity of the hot-state casting residues ranges from 6 to 8. According to the method, the liquid-state continuous casting residues are used in an energy-saving, environment-friendly, effective and stable manner for realizing the heat-state recycling of the castingresidues; and the consumption of steel materials can be reduced, the sensible heat of furnace slag can be effectively utilized, the smelting efficiency can be improved, the steelmaking production cost is reduced, the quality of molten steel is improved, and the environment-friendly benefit is obvious.

An ultra-low temperature smoke-exhausting energy-saving boiler relates to an energy-saving boiler capable of reducing pollution discharge. The invention aims to solve the problems of low fuel utilization efficiency caused by high dust concentration and high carbon content of fly ash in exhaust gas of existing coal-fired industrial boilers, and wear and tear of heat exchange equipment such as convection tube bundles and economizers at the tail of the boiler. The upper end of the furnace body communicates with the upper end of the vertical flue through the cyclone dust collector, the bottom end of the cyclone dust collector communicates with the furnace body, and a desulfurizer spout is opened on the upper end surface of the furnace body. The invention realizes the recycling of the desulfurizer in the effective area of ​​high-temperature sulfur fixation, greatly reduces the SO3 content in the flue gas while improving the SO2 removal efficiency, and improves the energy efficiency of the boiler by more than 10%; the unburned carbon particles are sent back for reburning The carbon content of the fly ash can be reduced to less than 2%, and at the same time, it can improve energy efficiency and reduce equipment wear. The energy-saving boiler of the invention can be used not only for newly-built boilers, but also for technical transformation of existing boilers.

The invention relates to a desulfurization device which comprises a desulfurizer and a gas-liquid separator, wherein the desulfurizer is sequentially connected with and provided with a buffer region, a front-end convergence region and a back-end diffusion region in the transverse direction; the buffer region is provided with a gas inlet and a liquid nozzle for spraying desulfurization slurry; the back-end diffusion region is provided with a gas outlet; the front-end convergence region is a cylinder which is gradually contracted in the gas flow direction; the back-end diffusion region is a cylinder which is gradually expanded in the gas flow direction; the ratio of the lengths of the buffer region, the front-end convergence region and the back-end diffusion region in the transverse direction is (3-5):(4-6):(3-5); the gas-liquid separator is provided with a gas outlet and a liquid outlet; and the gas-liquid separator is connected with the gas outlet of the back-end diffusion region through a pipeline. The desulfurization device provided by the invention is low in construction cost, low in operation energy consumption and high in desulfurization efficiency.

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 discloses a heteropolyacid ionic liquid supported aminated magnetic composite of a date cake structure, a preparation method and an application. The composite is prepared from raw materials including a heteropolyacid ionic liquid and an aminated magnetic composite by supporting the heteropolyacid ionic liquid on an aminated nano magnetic material with an ultrasonic immersing method.The preparation steps are shown as follows: firstly, the heteropolyacid ionic liquid is prepared through a substitution reaction, the aminated magnetic composite is prepared with a solvothermal method, and the heteropolyacid ionic liquid supported aminated magnetic composite is prepared with an ultrasonic supporting method. The product obtained with the method is powdery and brown, has uniform particle size distribution and has the date cake structure and stable properties. The defect of high probability of agglomeration of the magnetic materials is overcome, and the obtained material has gooddispersity, high magnetism and high yield, and raw materials are easy to obtain; the composite has magnetism and catalytic activity and can be effectively used for a catalyst for desulfuration of petroleum samples, and the catalyst can be separately recycled.

The present invention provides a dry desulfurization agent and a preparation method thereof. The dry desulfurization agent comprises the following components in parts by weight: 90-95 parts of modified nano calcium carbonate, 0.1-1 part of a catalyst and 0.1-1 part of activated carbon. A surfactant is used to modify nano calcium carbonate to obtain the modified nano calcium carbonate. The catalystis loaded on the activated carbon by pre-mixing the catalyst and activated carbon, and the catalyst-loaded activated carbon and nano calcium carbonate are mixed to obtain the dry desulfurization agent. The dry desulfurization agent can greatly improve a desulfurization rate, at the same time, has recyclability and reduces cost of a hazardous waste treatment.

The invention discloses a flue gas desulfurization system. The flue gas desulfurization system comprises an absorption tower, a wet type electric dust collector, a dehydrating unit and a circulating unit, wherein the absorption tower further comprises a slurry tank which is arranged at the bottom layer of the absorption tower, a flue gas inlet for introducing flue gas into the absorption tower, aspraying device arranged above the flue gas inlet, and a flue gas outlet which is formed in the top of a desulfurization tower. Through the absorption effect of the absorption tower, further dust removal is performed through the wet type electric dust collector, so that a sulfur component and other harmful components in the flue gas are removed, and a second product generated by absorption effectof the absorption tower is processed. Compared with the prior art, the flue gas desulfurization system can improve desulfurization efficiency, reduces corrosion loss in desulfurization reaction, can recycle wastewater generated in a recycling process, and is environmentally friendly and energy-saving.

The invention discloses a low energy consumption and long period hydrogenation process for producing ultralow-sulfur diesel oil. The hydrogenation process comprises the following steps: (a) fractionating diesel raw oil to obtain two fractions, namely a light fraction and a heavy fraction; (b) carrying out a hydro-desulfurization reaction on the heavy fraction diesel raw oil obtained in the step (a) in a first hydrogenation reaction zone under the action of a hydro-desulfurization catalyst; (c) reacting the material flow obtained in the step (b) with the light fraction diesel raw oil obtained in the step (a) in a second hydrogenation reaction zone under the action of a hydro-desulfurization catalyst; and (d) separating the material flow obtained in the step (c) into a gas phase and a liquidphase, and separating the liquid phase to obtain gas, naphtha and diesel oil products. The hydrogenation process has the advantages of low energy consumption, long operation period and the like.

The invention discloses a comprehensive deoxidizing and desulfurizing process for smelting stainless steel by using a small-capacity AOD (Argon Oxygen Decarburization) furnace. The comprehensive deoxidizing and desulfurizing process is characterized in that the furnace capacity of the AOD furnace is less than or equal to 10 tons, and primary molten steel added into the AOD furnace meets the specified requirements. After the oxygen-blowing decarburization period ends, a chromium-rich slag pre-reduction period begins, Ar(N2) is blown for more than or equal to 6 minutes, and the temperature of the molten steel is controlled to be 1770-1820 DEG C. In the secondary slagging period, after 80 to 90 percent of slag in the furnace is removed, lime and fluorite meeting the specified requirements are added; and after secondary new slag is formed, a comprehensive deoxidizing and desulfurizing agent which is composed of a deoxidizing agent metal Al block, a composite deoxidizing and desulfurizing agent Si-Ca block and a composite deoxidizing and desulfurizing agent Si-Ca-Ba-Al block and meets the specified requirements is added, and Ar(N2) is blown for more than or equal to 6 minutes. The tapping temperature is 1600-1640 DEG C. According to the process, on the basis of the prior art, the oxygen content of steel is remarkably reduced, and the quality of high-end stainless steel for cold (hot) machining deformation is improved.

The invention discloses a wet flue gas desulfurization system online decontamination scale inhibitor and a preparation method thereof, belongs to the field of chemical treatment agents, and particularly relates to a wet flue gas desulfurization system online decontamination scale inhibitor and a preparation method thereof. 700-1000mg of 100% mass lauryl sodium sulfate, 200-400mg of 100% mass quaternary ammonium sodium, 300-600mg of 100% mass sodium stearyl sulfate, 2-3g of 100% mass methacrylic sodium, 10-18g of 100% mass EDTA (ethylene diamine tetraacetic acid) tetrasodium, 30-40g of 100% mass phytic acid sodium salt hydrate, 50-100mg of 100% mass tributyl phosphate, 10-25mg of 100% mass potassium stearate and the rest distilled water are added into each liter of distilled water. The scale inhibitor is applicable to running wet flue gas desulfurization system online scale prevention and decontamination, the scale inhibitor is used once every 3-6 months, 0.1L of decontamination agent is added into 1L of slurry, the scale inhibitor is directly added into desulfurization slurry and used for 3-4 times every year, impurity deposition rate is reduced by 85% or more, and system blockingrate is reduced by 90% or more.

The invention provides a preparation method of a liquid desulfurizing agent and the liquid desulfurizing agent. The method comprises the following steps: adding ethanol as a solvent into a reaction kettle; then adding diethylenetriamine, epoxy chloropropane, 1, 3, 5-trihydroxyethyl hexahydro-s-triazine and a catalyst into the reaction kettle; stirring and heating the raw materials, controlling the raw materials to continuously react for a specified time at a specified reaction temperature, obtaining the liquid desulfurizing agent, the molar ratio of the catalyst to the 1, 3, 5-triethoxy hexahydro-s-triazine being 3: 1, and the molar ratio of the epoxy chloropropane to the diethylenetriamine to the 1, 3, 5-triethoxy hexahydro-s-triazine being 1: 1: (0.2-0.5). According to the technical scheme, the novel liquid desulfurizing agent is obtained, long-chain diethylenetriamino polyether substances generated after desulfurization of the liquid desulfurizing agent have good permeability and emulsifying performance, the dissolution rate of hydrogen sulfide and the mass transfer rate of hydrogen sulfide in a solution can be remarkably increased, desulfurization reaction is promoted, and environmental protection and reliability are realized.