79results about How to "Improve desulfurization effect" patented technology

The invention discloses a rotary counter-hedge industrial waste gas desulfurization system and a process thereof, comprising a reaction cylinder, wherein a top cover is fixedly connected to the top of the reaction cylinder, and an air inlet pipe is arranged on one side of the top cover; the rotary stirring action of the transmission blades is helpful to maintain the uniform distribution and flow state of the gas-liquid two phases in the mixing cylinder, which can accelerate the material diffusion and mass transfer process, and can increase the gas-liquid contact surface, thereby improving the efficiency of the desulfurization reaction; at the same time, the dirt, sediment and residue on the inner wall surface of the reaction cylinder and the mixing cylinder are cleaned by a soft scraper and a cleaning brush, thereby reducing the obstruction of the dirt to the gas-liquid reaction, allowing the gas and liquid to flow and mix more smoothly, thereby improving the desulfurization efficiency of the equipment, and the continuously rotating nozzle can make the reaction liquid spray into the waste gas in a more uniform and wider manner, thereby increasing the contact area of ​​the gas-liquid two phases, thereby accelerating the mixing effect between the waste gas and the reaction liquid.

The invention discloses a triazine desulfurizer and a preparation method thereof, and belongs to the technical field of gas purification. The triazine desulfurizer is mainly prepared from the following raw materials in percentage by weight: 20 to 50 weight percent of triazine derivative, 10 to 15 weight percent of sterically hindered amine, 3 to 7 weight percent of stabilizer, 1 to 3 weight percent of synergist, 0.5 to 1.5 weight percent of penetrant, 0.5 to 1.5 weight percent of inhibitor, 1 to 2 weight percent of additive and the balance of water, the preparation method of the triazine derivative comprises the following steps: adding 2-(diphenylphosphino) ethylamine into a toluene solvent, adding a paraformaldehyde aqueous solution in batches under a stirring condition, and reacting for 2-8 hours to obtain the triazine derivative. According to the triazine desulfurizer and the preparation method thereof provided by the invention, the triazine derivative and the sterically hindered amine are taken as a host, and the stabilizer, the synergist, the penetrant, the inhibitor and the assistant are compounded, so that the scaling trend of the triazine desulfurizer in an oil and gas well can be slowed down, the dissolution rate of hydrogen sulfide and the mass transfer rate in a solution are increased, and the desulfurization reaction is promoted; the desulfurization effect and the desulfurization rate are improved, and meanwhile, a very good scale inhibition effect is also achieved.

The utility model relates to the technical field of desulfurization, and discloses a multi-tube type high-efficiency desulfurization device, which comprises a bottom bin, a desulfurization part and a discharge bin, the desulfurization part is formed by vertically stacking and fixing a plurality of desulfurization components together, the lowest desulfurization component is fixed at an opening at the top of the bottom bin, and the discharge bin is fixed at the bottom of the bottom bin. And the discharge bin is fixedly mounted at an opening in the top of the uppermost desulfurization assembly. According to the multi-pipe type efficient desulfurization device, as the mounting shaft is in a reciprocating forward and reverse state, the spraying pipe can be driven to rotate clockwise and then rotate anticlockwise to reset, so that the atomizing nozzle is in a small-angle swinging state, and spraying corners and dead angles existing when the atomizing nozzle is in a fixed state can be supplemented in the moving process of the atomizing nozzle; the atomizing nozzle is free of corners and dead corners during spraying, sufficient and uniform contact between flue gas and lime emulsion is guaranteed, and the desulfurization effect on the flue gas is improved.

The utility model discloses a boiler flue gas dry desulfurization device which comprises a desulfurization tank, a flue gas inlet pipe and a flue gas exhaust pipe are respectively arranged on two sides of the desulfurization tank, a manhole is arranged at the front end of the desulfurization tank, a material collecting box is arranged at the bottom end of the desulfurization tank, a medicament box is arranged on one side of the material collecting box, a discharge port is arranged at the bottom end of the medicament box, and a gas outlet is arranged at the bottom end of the medicament box. And a feeding pipe is mounted at the top end of the medicament box. By arranging the material collecting box, the medicament box, the feeding pipe, the feeding motor, the conveying pipe and the spiral packing auger, alkali powder is recycled, the spiral packing auger is driven to rotate by the operation of the feeding motor, the alkali powder in the medicament box is conveyed into the conveying pipe and is fed into the desulfurization tank from the top end, and under the action of gravity, the alkali powder in the medicament box is conveyed into the desulfurization tank. The alkali powder can fall into the material collecting box, and the alkali powder is guided into the chemical agent box by matching with the appearance of the material collecting box, so that the alkali powder is repeatedly used, and the loss and the use cost of the alkali powder are reduced.

The invention relates to the technical field of flue gas desulfurization, in particular to a limestone-gypsum wet desulfurization device, which is characterized in that a plurality of spray pipes are annularly arranged in a desulfurization tower, and spray holes are formed along the circumferential surfaces of the spray pipes, so that limestone slurry is horizontally sprayed out, the direct impact of flue gas on the spray holes and the attachment of reactants are effectively avoided, and the desulfurization efficiency is improved. And the blocking risk is reduced. And meanwhile, the horizontally sprayed slurry can clean the surface of the spraying pipe, so that blockage is further prevented. Due to the synchronous lifting and rotating design of the first lifting plate and the stirring blades, the mixing and stirring of slurry with different heights in the desulfurization tower are enhanced, and the stirring efficiency is improved. The second lifting plate and the first lifting plate act synchronously, impurities in the spraying holes are cleaned through a brush, and blockage caused by limestone slurry impurities is avoided. Due to the design, the desulfurization efficiency is improved, the maintenance work is simplified, the maintenance cost is reduced, and the stability and the reliability of the system are enhanced.

The invention relates to a calcium-based solid waste residue slurry desulfurizer, a preparation method, a desulfurization method and a soil remediation agent, and belongs to the technical field of solid waste utilization. The method comprises the following steps: carrying out sedimentation treatment on calcium-based solid waste residue slurry to obtain a calcium-based solid waste residue slurry reaction solution; adding a phase change inhibitor into the calcium-based solid waste residue slurry reaction liquid to obtain mixed slurry; and carrying out solid-liquid separation on the mixed slurry to obtain a solid-phase substance, mixing the solid-phase substance with water, and adding a conditioning agent to obtain the calcium-based solid waste residue slurry desulfurizer. The desulfurizer can be used for desulfurization reaction to obtain a desulfurization solution and desulfurization solid slag; carrying out solid-liquid separation on the desulfurization solution after neutralization reaction to obtain washing water filtrate and secondary desulfurization solid residues; and preparing the soil ecological restoration agent from the desulfurized solid residues and the secondary desulfurized solid residues. The desulfurizer is prepared from the calcium-based solid waste residue slurry discharged by aluminum oxide, alkali resources are recycled, the loss of aluminum oxide is reduced, the desulfurizer is used for flue gas desulfurization, the purpose of resource utilization of solid waste is achieved, and the desulfurizer has the value and significance of reducing pollution and carbon and achieving synergistic interaction.

The invention discloses a desulfurization, denitrification and dust removal process for low-sulfur flue gas, belongs to the technical field of desulfurization and denitrification, and aims to solve the problems that gas molecules are not easy to diffuse and adsorb on particle surfaces in a gas desulfurization and denitrification project by using a combined desulfurization and denitrification adsorbent in the prior art; the sulfur capacity, the nitrate capacity, the specific surface area and the desulfurization and denitrification efficiency of combined desulfurization and denitrification need to be further improved. The method comprises the following steps that after mechanical dust in low-sulfur flue gas is filtered through a dust remover, the temperature is reduced to the room temperature, and pretreated waste gas is obtained. Porous high-iron ash is modified through an alkali magnetic method, activated carbon is prepared through activation and modification through an alkali dissolution method and serves as a base material, an adhesive is added, granulation is conducted, and the pretreated waste gas is obtained. The sulfur capacity, the nitrate capacity and the specific surface area of the combined desulfurization and denitrification adsorbent are improved, the desulfurization and denitrification efficiency is improved, and emission of pollutants in sintering flue gas is reduced.

The invention relates to the technical field of multi-component alloy preparation, and discloses a rare earth oxide-containing silicon-barium alloy and a preparation method thereof.The preparation method comprises the following steps: mixing rare earth balls, silica, baryta, a layered composite material, modified carbon fibers, semi-coke and steel cuttings to obtain a mixture; and the mixture is placed in a submerged arc furnace to be circularly smelted, mixed rare earth silicon barium alloy liquid is formed, the mixed rare earth silicon barium alloy liquid is subjected to refining and slagging-off, casting forming is conducted, and the silicon barium alloy containing the rare earth oxide is obtained. The formed layered composite material has relatively high interlayer capacity, and the silicon element and the rare earth element in the mixture can be adsorbed to the interlayer of the layered composite material, so that the formation of a uniformly distributed silicon-barium-rare earth alloy phase is facilitated; the modified carbon fibers are small in size and can be filled into pores of the silicon-barium alloy, the compactness of the alloy is improved, and then the compactness of the silicon-barium-rare earth alloy phase is enhanced.

The utility model relates to the technical field of flue gas desulfurization, in particular to a coke oven flue gas desulfurization and regeneration integrated tower which comprises a bottom plate, the top of the bottom plate is fixedly connected with a control plate and a desulfurization cylinder respectively, a first filter screen is fixedly connected in the desulfurization cylinder, the surface of the first filter screen is fixedly connected with a magnetic plate, and a second filter screen is arranged at the top of the first filter screen. The bottom of the second filter screen is fixedly connected with an iron plate, the iron plate is in magnetic attraction connection with the magnetic plate, an insertion groove is formed in the second filter screen, a third filter screen is arranged at the top of the second filter screen, the bottom of the third filter screen is fixedly connected with an insertion rod, and the insertion rod extends into the insertion groove and is in insertion connection with the insertion groove; a driving motor is mounted at the top of the desulfurization cylinder; the stirring rod can be driven to rotate under the power action of the driving motor, and the catalyst is in full contact with the flue gas through the rotation of the stirring rod, so that the flue gas desulfurization effect and the flue gas desulfurization speed can be improved, and the practicability of the whole device is higher.

This invention relates to the field of petrochemical catalytic desulfurization technology, specifically disclosing a high-efficiency desulfurizing agent, its preparation method, and its application in the desulfurization of heavy naphtha. The desulfurizing agent provided by this invention has a "two-level" metal active center. The first level is a cobalt center in biochar, and the second level is a nickel-copper bimetallic center introduced through impregnation on the surface of a composite carrier. The desulfurizing agent provided by this invention has excellent desulfurization effect. Under conditions of 140°C and no hydrogen, it can simultaneously remove inorganic sulfur such as hydrogen sulfide and organic sulfur such as thiols, thioethers, and thiophenes from heavy naphtha obtained by hydrocracking of heavy diesel oil, wax oil, or mixed diesel and wax oil, reducing the total sulfur content from 25-40 μg·g. ‑1 Reduced to 0.2 μg·g ‑1 The following methods can effectively protect bimetallic (multimetallic) reforming catalysts from sulfur poisoning, and the preparation process is green and controllable, making it suitable for large-scale industrial applications.

The present invention relates to a desulfurization device and a desulfurization method for collaboratively treating boiler flue gas and sulfuric acid tail gas; the device comprises a boiler tail gas system and a desulfurization system, and a sulfuric acid production device; the boiler tail gas system comprises a boiler, and the tail gas pipeline of the boiler is connected to a first pressure gauge; the desulfurization system comprises a middle and lower air inlet of a desulfurization tower, a first online analyzer is arranged at the top gas outlet of the desulfurization tower, a first packing layer is arranged at the inner upper part of the desulfurization tower, a first differential pressure gauge, a first upper flushing water spray device and a first lower flushing water spray device are arranged between the upper and lower sides of the first packing layer, and a first flushing water recovery device is arranged at the bottom of the first lower flushing water spray device; the outlet of the acid mist collector of the sulfuric acid production device is connected to the middle and lower air inlet of the desulfurization tower through a sulfuric acid tail gas pressure gauge, a pollutant detector and a first sulfuric acid tail gas air supply valve; the device has the characteristics of reasonable process design, low initial investment, low power energy consumption, high desulfurization efficiency, good desulfurization effect and environmental friendliness.

The utility model relates to the technical field of flue gas desulfurization, in particular to a desulfurization structure of a double-shaft kiln type calcining furnace, which comprises a base, fixing blocks are arranged on two sides in the base, a filter plate is arranged above the fixing blocks on two sides, and an auxiliary mechanism is arranged between the bottom of the filter plate and the fixing blocks. A butt joint mechanism is arranged at one end of the exterior of the filter plate, a butt joint groove is formed in one side of the interior of the base, a limiting mechanism is arranged in the butt joint groove, and a collecting box is arranged at the position, below the filter plate, in the base. Under the driving of the air cylinder, the connecting block is pushed to move in a reciprocating mode, one end of the connecting block is meshed with the first rack and the second rack through the gear arranged on the rotating shaft, meanwhile, the spraying assembly is driven to move in a reciprocating mode, and therefore the spraying assembly sprays desulfurization liquid to flue gas in the box body back and forth, and the desulfurization liquid is sprayed more evenly; the flue gas desulfurization effect and the working efficiency are further improved, and the practicability of the device is improved.

This utility model provides a rotary kiln flue gas desulfurization device with a sodium-based powder uniformly spraying structure, including: a dust removal component, a powder spraying component, and a pipeline component. The powder spraying component is connected to the pipeline component through a conveying pipe, and the pipeline component is connected to the dust removal component through a connecting pipe. The dust removal component includes: a dust collector body. The pipeline component includes: pipeline one, pipeline two, and pipeline three. Pipeline one and pipeline two are respectively installed at the left and right ends of pipeline two. A vibrator is installed on the upper surface of pipeline two. Compared with the prior art, this utility model has the following beneficial effects: by setting the powder spraying component, the uniform spraying of sodium-based powder during use can ensure that the desulfurizing agent is fully dispersed in the flue gas of the pipeline component. During the flue gas desulfurization process, uniform spraying can give the sodium-based powder more contact opportunities with acidic gases such as sulfur dioxide, thereby forming a better desulfurization effect.

The present invention relates to a refining slag-forming agent, a preparation method and a smelting method applied to low-carbon steel wire rods. Waste slag and waste magnesium carbon bricks generated in the aluminum-killed steel refining process are used as main raw materials, which are mixed and crushed in a certain proportion to form a refining slag-forming agent that can be used for low-carbon steel wire rods and has anti-ladle erosion performance. The smelting method performs secondary deoxidation and modification on the refined slag through a reasonable feeding method, and designs a CaO-Al2O3-SiO2-MgO quaternary refining slag system with a high MgO content, which replaces the original CaO-SiO2 slag system. The present invention can not only meet the requirements of low-cost and pollution-free products, but also realize the metallurgical functions of refining rapid slag-forming, desulfurization and reducing the erosion of ladle refractory materials.

The utility model relates to the technical field of desulfurization and dust removal, in particular to a high-temperature desulfurization and dust removal device. The utility model provides a high-temperature desulfurization and dust removal device which can slow down the moving speed of gas and improve the desulfurization effect. A high-temperature desulfurization and dust removal device comprises a ventilation pipe, a first flange plate, a second flange plate, separation plates and a heating ring, the lower side of the ventilation pipe is connected with the first flange plate, the upper side of the ventilation pipe is connected with the second flange plate, and the middle of the ventilation pipe is connected with the seven separation plates. The middle of the ventilation pipe is connected with the six heating rings, and each heating ring is located between every two adjacent separation discs. In the process that sulfur-containing gas moves from top to bottom, the sulfur-containing gas can be in contact with the separation disc and the heating ring, so that high-temperature desulfurization is carried out, the separation disc can slow down the moving speed of the gas, and the heating desulfurization effect is further improved.

The present application relates to the technical field of metal organic framework materials, in particular to a modified copper-based metal organic framework material, a preparation method and application thereof, and a sulfide removal method. The modified copper-based metal organic framework material comprises a metal organic framework formed by copper and an organic ligand, and silver doped on the metal organic framework; and the crystal surface of the modified copper-based metal organic framework material has long and narrow honeycomb-shaped pores. + and Ag + The modified copper-based metal organic framework material has suitable pore structures and rich adsorption sites for removing various organic sulfides, and the modified copper-based metal organic framework material has Cu + and Ag + which can adsorb sulfides through π bond action, and has a large adsorption capacity and high adsorption selectivity for sulfides (such as mercaptans, sulfides, thiophenes, etc.) as a desulfurization adsorbent.

The utility model relates to the technical field of atmospheric desulfurization, and particularly discloses atmospheric desulfurization equipment. The desulfurization device comprises a treatment tank, an exhaust pipe fixedly mounted on the treatment tank, an air suction and supply fan for conveying air to be desulfurized into the treatment tank, a first desulfurization component arranged in the treatment tank, and a baffle fixedly mounted on the treatment tank. According to the atmospheric desulfurization equipment disclosed by the utility model, when air is subjected to desulfurization treatment, as the lower partition plate and the upper partition plate are arranged in an up-and-down staggered manner, air to be treated enters the desulfurization filler to be subjected to falling treatment, the contact time between the air and the desulfurization filler can be prolonged; air flows through an S-shaped channel formed between the second flow guide plate and the two first flow guide plates, so that the air is in multiple contact with the atomized desulfurization liquid, the retention time of the atmosphere in the treatment tank is prolonged, the desulfurization effect is improved, and harmful dust in the air is purified.

The utility model discloses a spraying mechanism of a boiler desulfurization dust remover, which belongs to the technical field of desulfurization and dust removal and comprises a smoke outlet barrel, a smoke inlet is arranged in the middle of the smoke outlet barrel, a smoke outlet is arranged at the top of the smoke outlet barrel, a desulfurization spraying mechanism is arranged in the middle of the smoke outlet barrel, and a secondary spraying mechanism is arranged at the top of the smoke outlet barrel. According to the device, the desulfurization spraying mechanism is arranged, in the process, slurry is supplied to the flow dividing head through the first ring pipe, the slurry is sprayed out through the three spraying pipes and the first spraying head, the slurry is sprayed out through the second ring pipe, and the slurry is sprayed out through the third spraying pipe and the second spraying head. The slurry can be in full contact with the smoke through spraying of the multiple first spraying heads, meanwhile, the lengths of the three spraying pipes are different, the sprayed slurry can be evenly distributed in the middle of the smoke outlet barrel, even spraying operation on the smoke in the smoke outlet barrel is achieved, and the spraying effect is improved.

Micro-droplet double-strengthened liquefied gas desulfurization reactor, reaction system and reaction method relate to the field of liquefied gas desulfurization treatment, the desulfurization reactor has liquefied gas liquid discharge port in the upper part and amine liquid discharge port in the lower part, the desulfurization reactor has amine liquid area in the lower part, liquefied gas liquid area in the upper part and mixing area formed by the junction of amine liquid area and liquefied gas liquid area, the liquefied gas liquid area is provided with amine liquid nozzle capable of spraying amine liquid droplets, the amine liquid area is provided with liquefied gas liquid nozzle capable of spraying liquefied gas droplets, the pressure environment in the desulfurization reactor is 1.6 MPa or more, so as to keep the liquefied gas liquid entering the desulfurization reactor in liquid phase state, the liquefied gas droplets are desulfurized and mass transfer in the amine liquid area and flow upwards, sequentially contact and react with amine droplets in the mixing area and amine droplets in the liquefied gas liquid area, and complete the desulfurization treatment of liquefied gas. The present application is used to solve the problems of slow desulfurization speed and poor desulfurization effect of hydrogen sulfide in liquefied gas in the removal process.

The utility model relates to the technical field of desulfurization devices, in particular to a desulfurization agent adding device in a sintering process, which comprises a desulfurization tower, the side wall of the desulfurization tower is fixed and communicated with an air inlet pipe and an exhaust pipe, the inner wall of the desulfurization tower is provided with a filling structure, the filling structure comprises a water pump, and the water pump is fixedly connected with the desulfurization tower. A liquid discharging end of the water pump is fixedly communicated with a liquid discharging pipe, the liquid discharging pipe penetrates through the top of the desulfurization tower, one end of the liquid discharging pipe is rotatably connected with a water distribution pipe, the arc surface of the water distribution pipe is fixedly communicated with a plurality of spraying pipes, and the inner wall of the desulfurization tower is fixedly connected with a leakage net. When flue gas generated in the sintering process is treated, a desulfurizing agent can drip by virtue of the leakage net, and after the desulfurizing agent is in contact with sulfur dioxide which is not completely treated in the flue gas, the sulfur dioxide can be secondarily purified, so that the desulfurization effect is improved.

The utility model discloses a flue gas dry desulfurization device for a biomass boiler, which comprises a square pipe, a flue gas inlet pipe is mounted on one side of the square pipe, a flue gas exhaust pipe is mounted on the other side of the square pipe, a flue gas exhaust fan is mounted in the flue gas exhaust pipe, a butt joint pipe is mounted in the flue gas inlet pipe, a flange pipe is mounted on one side of the butt joint pipe, and a flue gas outlet pipe is mounted on the other side of the flange pipe. And an activated carbon round rod is mounted in the butt joint pipe. The flue gas desulfurization device is provided with the flue gas inlet pipe, the flange pipe, the butt joint pipe, the activated carbon round rod, the through hole and the rubber ring, flue gas desulfurization treatment is achieved, the flue gas desulfurization device is small in size, compact in structure, small in occupied space, convenient to carry and low in cost, the flange pipe can be connected with a flue, flue gas can be directly conveyed into the butt joint pipe, and the flue gas desulfurization effect is improved. In cooperation with the arrangement of the activated carbon round rods and the through holes, the flue gas can uniformly penetrate through the interiors of the activated carbon round rods, and the activated carbon can adsorb sulfur dioxide in the flue gas so as to realize desulfurization treatment on the flue gas.

The utility model is applicable to the technical field of ship waste gas treatment, and provides a marine horizontal desulfurization device which comprises a horizontal reaction bin, a cooling mechanism, a settling mechanism and a filtering mechanism are sequentially arranged in the horizontal reaction bin, and a gas inlet pipe is arranged at one end of the horizontal reaction bin and close to the cooling mechanism. An exhaust pipe is arranged at the other end of the horizontal reaction bin and far away from the cooling mechanism; and a flow blocking mechanism is movably arranged in the horizontal reaction bin and between the cooling mechanism and the settling mechanism. By adopting the horizontal reaction bin which is transversely arranged, the gravity center of the ship can be lowered, and the stability of the ship is good; a cooling mechanism, a settling mechanism and a filtering mechanism are sequentially arranged in the horizontal reaction bin; the flue gas entering from the gas inlet pipe is cooled, sparks in waste gas are eliminated, the flue gas is settled, and fine sediment particles are filtered out in sequence; the flow choking mechanism is arranged between the cooling mechanism and the settling mechanism and is used for carrying out flow choking and speed reduction on the flue gas, so that the absorption reaction time of the flue gas and water mist is prolonged, and the desulfurization effect is good.

The invention relates to the technical field of desulfurizing agents, in particular to a ferric oxyhydroxide desulfurizing agent and a preparation method thereof. According to the iron oxyhydroxide desulfurizing agent, zinc oxide nanoparticles are doped on the surface of iron oxyhydroxide, then the zinc oxide nanoparticles and manganese dioxide form a core-shell structure with manganese dioxide as a shell and iron oxyhydroxide as a core, and finally the core-shell structure is loaded on carbon nanofibers to finally obtain the iron oxyhydroxide desulfurizing agent. The iron oxyhydroxide desulfurizer disclosed by the invention has excellent sulfur removal performance, can still keep relatively excellent sulfur removal performance under the condition that interfering ions such as PO4 < 3-> and SO3 < 2-> exist in water, and can be widely applied to the field of industrial sulfur removal.

The invention provides a molten steel desulfurization method using a long nozzle to inject powder, and belongs to the technical field of metal smelting, and the method comprises the following steps: directly installing a desulfurization powder injection device on the long nozzle, injecting the desulfurization powder into the long nozzle through the injection device, and utilizing the retention time of molten steel in the long nozzle to inject the desulfurization powder into the long nozzle; the molten steel is in full contact with the desulfurization powder before being discharged from the long nozzle, the molten steel is effectively desulfurized through the desulfurization powder before being discharged from the long nozzle, and the sulfur content in the molten steel is reduced; before the long nozzle is opened, the injection device injects the carrier gas, on one hand, the carrier gas can dredge the injection device, the desulfurization powder is prevented from blocking the injection device, and smooth discharge of the desulfurization powder is guaranteed; and on the other hand, the powder outlet uniformity of the desulfurization powder at the beginning of injection and at the end of injection can be improved, so that the uniformity of the whole injection process of the desulfurization powder is ensured, the desulfurization powder is in uniform contact with the molten steel, and the desulfurization effect on the molten steel is improved.

The invention discloses a water-resistant desulfurizer and a preparation method thereof, and belongs to the technical field of molten steel smelting, the water-resistant desulfurizer comprises Mg3N2 and modified CaCO3; the modified CaCO3 is prepared by the following steps: preparing a Tris buffer solution, then adding a dopamine hydrochloride aqueous solution with a mass fraction of 1-2%, stirring at a constant speed of 150-200 r / min at room temperature for 2 h, then adding calcium carbonate powder, and dipping for 2 h to prepare the modified CaCO3. According to the invention, Mg3N2 is taken as a main material, Al2O3 and SiO2 are taken as auxiliary materials, modified CaCO3 is taken as a binder, pellets are prepared by adopting a pressing and pelletizing mode, the desulfurizer can be endowed with excellent moisture-proof and water-resistant performance, and when the desulfurizer is used, Mg3N2 is used for decomposing magnesium metal, so that the desulfurizer has extremely strong desulfurization capacity; the calcium carbonate is decomposed into calcium oxide at high temperature to promote magnesium desulfurization, so that the prepared desulfurizer has excellent desulfurization performance.

This utility model discloses a waste heat treatment device for high-temperature flue gas, including a flue gas channel connected to a desulfurization tower. A wastewater collection tank is connected below the desulfurization tower, and the wastewater collection tank is connected to a wastewater pretreatment tank. The wastewater pretreatment tank is connected to a wastewater treatment tank. A heat exchange section is provided on the flue gas channel, and a heat exchange chamber is provided outside the heat exchange section. A steam heat exchange pipe is provided on the wastewater treatment tank, including an inlet end and an outlet end. The outlet end is connected to the heat exchange chamber, and the heat exchange chamber is connected to the inlet end. A spray structure is provided inside the desulfurization tower, connected to a slurry tank, which is connected to a slurry preparation tank. A heat exchange pipe is also provided inside the flue gas channel, with one end connected to a water source and the other end connected to the slurry preparation tank. In this utility model, the flue gas undergoes two cooling and heat exchange cycles before entering the desulfurization tower for desulfurization, improving desulfurization efficiency and effect. Simultaneously, waste heat is recovered and utilized for heating wastewater and preheating the desulfurization slurry, improving waste heat utilization efficiency.

A method for reducing slag viscosity during blast furnace smelting belongs to the field of ironmaking technology. This invention solves the problem that excessively high slag viscosity hinders desulfurization and makes slag discharge difficult. Specifically, it includes the following steps: S1: Increasing the slag temperature from the original 1530℃ to above 1550℃; S2: Controlling the basicity of the slag, which was originally 1.20 to 1.28 times higher, to between 1.15 and 1.25 times higher; S3: Increasing the MgO content in the original slag from 6% to 8% to 12%; S4: Reducing the FeO content in the original primary slag from 35% to ≤22%; S5: Reducing the Al2O3 content in the original slag from 20% to ≤19%; S6: Controlling the CaF2 content in the original slag from 1.0% to 1.0% to 2.0%. This invention, through precise control of the composition, maintains suitable viscosity and surface properties in the slag. It significantly improves the desulfurization reaction efficiency and desulfurization capacity of slag, and improves the quality of molten iron; moreover, the optimized viscosity range, combined with the increased tapping frequency, ensures that slag and iron can be smoothly separated and discharged, promoting efficient smelting.

The application provides a compound, a preparation method thereof and a composition containing the compound. A structural formula of the compound is shown as formula I. The preparation method of the compound is as follows: mixing diisopropanolamine and ethylene glycol diglycidyl ether, adding the mixture into a reaction kettle, adding a solvent, and reacting at 80-120 DEG C for 4-8 h, and then distilling at 50-80 DEG C under reduced pressure, collecting the distillation product, and obtaining the compound; mixing the compound and N-methyldiethanolamine in a mass ratio of (1-2):(2-3), and uniformly mixing to obtain a 20-60 wt% aqueous solution, and obtaining the composition.

This invention relates to a medium-high fluorine, low-alumina slag system for electroslag remelting S-06 stainless steel, belonging to the field of electroslag special metallurgical technology. It addresses the problems of high fluorine content, significant pollution, and poor uniformity of steel ingots produced by existing electroslag remelting slag systems. The mass percentage of each component in the medium-high fluorine, low-alumina slag system of this invention is as follows: CaF2: 56.4%~57.3%, Al2O3: 11.5%~14.9%, CaO: 19.7%~20.2%, MgO: 8.0%~10.0%, SiO2: 0.9%~1.1%, C: 0.04%~0.06%, with the remainder being impurities. The slag system of this invention exhibits good metallurgical effects; when using this slag system for electroslag remelting S-06 stainless steel, the resulting steel ingots show uniform elemental distribution and a uniform slag coating.

The present invention relates to the technical field of ship exhaust gas treatment, and specifically to an integrated system for ship exhaust gas desulfurization and decarbonization, including a desulfurization washing tower, a carbon dioxide membrane separator, a heat exchanger, a carbon dioxide storage tank and an intake valve group, wherein the desulfurization washing tower includes: a support plate; a washing assembly, wherein the washing assembly includes a tower body fixedly installed on the end surface of the support plate, a filler is fixedly installed at the middle position of the inner wall of the tower body, and a first screw is arranged below the filler. The present invention forms dihydrate gypsum through desulfurization crystallization, which may strongly adhere to the surface of the filler and cause blockage, so that the exhaust gas cannot flow normally, and the fan blades and the rotating rod cannot rotate. The Hall speed sensor will detect the speed of the fan blades and the rotating rod to judge the blockage, and drive the water pressure plate to continuously squeeze the lime water inside the water tank to allow the lime water to flow back to the inside of the tower through the water box to backwash the filler, so as to avoid the blockage of the filler causing the exhaust gas to be unable to flow normally.