18results about How to "Reduce desulfurization cost" patented technology

The utility model relates to the technical field of boilers, in particular to wet desulphurization equipment for boiler flue gas waste heat recovery, which comprises a boiler body, a circulating water tank, supporting legs, a water pumping pipe and a stirring and mixing device, the stirring and mixing device comprises a stirring shaft, stirring blades, a driving assembly and an auxiliary assembly, and the stirring shaft is rotatably connected with the boiler body. The stirring blades are fixedly connected with the stirring shaft, the driving assembly is arranged on the boiler body, the auxiliary assembly is arranged on the boiler body, and in the desulfurization process of the boiler body, when lime water is added into the boiler body for desulfurization, the driving assembly is started, the driving assembly drives the stirring shaft to drive the stirring blades to rotate in the boiler body, and the stirring blades rotate in the boiler body. The lime water is stirred and mixed by the stirring blades, so that the lime water in the boiler body can be stirred and mixed, the lime water in the boiler body is fully stirred, precipitation is avoided, the lime water is effectively utilized, and the desulfurization cost is reduced.

The invention provides a wet-process phosphoric acid purification method and purification system, and belongs to the technical field of wet-process phosphoric acid purification. Raffinate acid generated through extraction is subjected to secondary extraction and then returns to be mixed with wet-process phosphoric acid, washing residual acid is returned to a desulfurization treatment step and is recycled to form an acid closed loop, and the wet-process phosphoric acid is obtained. The whole wet-process phosphoric acid purification process does not generate acid by-products and is environment-friendly, the yield of the purified phosphoric acid product is greater than 95%, and the treatment trouble of the acid by-products does not need to be worried about.

The invention discloses a method for smoothly tapping first-time iron during blow-in of a blast furnace. In the blow-in process of the blast furnace, a series of measures of controlling the granularity of bottom coke, controlling the coke ratio of the whole furnace and slag R, optimizing a sleeper filling mode, quickly opening an iron notch after air supply to eliminate a hearth gas circulation dead zone, setting a main channel sand dam to prolong the slag spraying time of the iron notch and the like are taken. By setting the control points, the heat exchange effect of the hearth and the coal gas can be effectively improved, the slag iron temperature can be effectively increased at the earlier stage of the same full-furnace coke ratio, molten iron is low in Si and S, the physical temperature is sufficient, the slag iron can flow out smoothly, water slag can be flushed through iron for the first time, and the cost is reduced. And the desulfurization cost of the subsequent steelmaking procedure and the slag outward transportation cost are greatly reduced, and the working intensity of a stokehold is greatly reduced.

The present invention discloses a coal utilization system coupled with an ultra-low emission coal gasification-gas boiler, wherein the coal utilization system is mainly composed of a coal powder bin, a vertical strong vortex liquid slag removal gasifier, a slag pool, a desuperheater, a bubbling fluidized bed dry desulfurization desulfurization tower, a separation ash + desulfurization product bin, a high-temperature low-oxygen coal gas burner, a MILD gas boiler with an SNCR device, a high-temperature air duct, a high-temperature flue gas duct, a bag filter, an induced draft fan, a chimney and other equipment. The system uses high-temperature molten air gasification technology for coal gasification, and the generated hot coal gas is desulfurized by a pre-arranged bubbling fluidized bed desulfurization tower, and then MILD combustion and heat release are carried out in a MILD gas boiler with an SNCR device equipped with a high-temperature low-oxygen coal gas burner. The core of the present invention is to innovatively propose a coal utilization system coupled with a new type of pre-desulfurization ultra-low emission coal gasification-gas boiler that integrates multiple ultra-low emission advantage technologies, and the system has the advantages of low cost, low water consumption, and low pollution.

The utility model relates to a desulfurization process system for a methyl tert-butyl ether crude product, which is characterized in that the crude product and light diesel oil are mixed in a feeding main pipeline, the feeding main pipeline is connected from a tray position in the middle of a distillation tower, the tower top of the distillation tower is connected with a tower top cooler, and the tower top cooler is connected with a liquid inlet of a return tank; one part of a liquid outlet of the reflux tank is connected to the tower top of the distillation tower through a reflux pump, the other part of the liquid outlet is connected to a refined product discharge pipeline, and a thermal bypass is added between the tower top of the distillation tower and the reflux tank for control; a bottom liquid outlet of the reboiler is connected with the bottom of the distillation tower, a top liquid injection port of the reboiler is connected with the upper part of a liquid level line of the distillation tower, the bottom of the distillation tower is also connected with a heavy component cooler through a heavy component delivery pump, and the heavy component cooler is externally connected with a diesel oil hydrodesulfurization device. According to the process system, the light diesel oil which is easily obtained in a refinery plant is used as an auxiliary material, and the generated hydrogen sulfide is digested in an own device of the refinery plant, so that the desulfurization cost of the methyl tert-butyl ether is greatly reduced.

The present invention discloses a welding wire for gas shielded arc welding, and a steel wire rod of a welding wire for gas shielded arc welding and a production method therefor. Chemical components of the steel wire rod of a welding wire for gas shielded arc welding include, in mass percentage, 0.03%-0.08% of C, 0.5%-1.0% of Si, 1.4%-1.8% of Mn, 0.013%-0.1% of S, less than or equal to 0.0015% of P, less than or equal to 0.8% of Ni, less than or equal to 0.4% of Cr, less than or equal to 0.4% of Mo, and the balance of Fe and inevitable impurities; and a liquidus temperature TL=1537-88[C]-8[Si]-5[Mn]-30[P]-25[S], a solidus temperature Ts=1536-415[C]-12[Si]-6.8[Mn]-125[P]-184[S], and 25°C≤TL-TS≤45°C.

The present invention relates to the technical field of diesel desulfurization, and specifically to a diesel deep desulfurization system and method, comprising a base and a separation tank, and also comprising a reaction tank, a hydrogenation mechanism, a catalytic mechanism and a stirring mechanism. A support plate is fixedly provided on the top of the base. The catalytic mechanism comprises a receiving tube, an adjustment component, an extrusion component, two conveying pipes and two storage tanks. The stirring mechanism comprises a driving motor, a rotating shaft and a plurality of stirring components. The hydrogenation mechanism comprises a hydrogen tank, a conveying component, a switching component and a transmission component. The driving motor, the adjustment component, the extrusion component and the conveying component are all electrically connected to a controller. The diesel deep desulfurization system and method of the present invention utilizes an adjustment component to switch the type of catalyst entering the receiving tube, thereby meeting the catalytic requirements of diesel with different sulfur contents, improving the catalytic efficiency, and thus being beneficial to improving the desulfurization effect, while increasing the practicality of the system.

The invention discloses a refining desulfurization amine liquid purification system. The system comprises a pretreatment system, an electrodialysis system, and an electromechanical control system and a valve pipeline system which are matched and affiliated, the electrodialysis system comprises a membrane separation stack as well as a fresh water device, an electrode water device, a water production device and a concentrated water device which are connected to the membrane separation stack; the membrane separation stack comprises an anode plate, a membrane stack, a cathode plate and a fixing plate for fixing the membrane separation stack; the membrane stack comprises ion exchange membranes and partition plates; the ion exchange membranes comprise cation exchange membranes and anion exchange membranes; the cation exchange membranes and the anion exchange membranes are alternately arranged. The invention aims to reduce the wastewater generation amount, reduce the MDEA (methyldiethanolamine) entrainment loss and reduce the regeneration energy consumption through an electrodialysis technology; meanwhile, waste alkali liquor caused by electrodialysis can be reduced, the production cost is reduced, and the quality of downstream products is stabilized.

The utility model relates to the field of flue gas desulfurization, in particular to an energy-saving flue gas desulfurization tower which comprises a mounting bottom plate, a motor and a gas inlet pipe, a desulfurization tower shell is arranged at the upper end of the mounting bottom plate, a transmission shaft is arranged in the desulfurization tower shell, a connecting rod is arranged on the side face of the transmission shaft, and a scraping plate is fixed to the end, away from the transmission shaft, of the connecting rod. The lower end of the transmission shaft is connected with a motor, a packing layer is arranged in the desulfurizing tower shell, a spraying pipe is arranged above the packing layer, an atomizing nozzle is arranged at the lower end of the spraying pipe, and an exhaust port is formed in the upper end of the desulfurizing tower shell. The flue gas can be effectively desulfurized, and the desulfurization efficiency is improved; and through the design of the circulating pump and the circulating pipe, the spraying liquid can be recycled, the consumption of water resources is reduced, and meanwhile, the desulfurization cost is reduced.

This invention relates to a method for recovering associated zinc from copper concentrate during copper smelting, belonging to the field of non-ferrous metal smelting and mineral processing technology. The method includes: preparing and grinding copper concentrate to obtain a finely ground slurry; the -0.074 mm particles in the finely ground slurry constitute 92-95% of the total solid particles; mixing the finely ground slurry with a copper collector and a zinc inhibitor; the zinc inhibitor contains sulfur dioxide, and the mixing temperature of the zinc inhibitor and the finely ground slurry is 40-50°C; and using microbubble flotation technology to separate copper from zinc concentrate using flotation, obtaining copper concentrate and zinc concentrate; the foam diameter of the microbubble flotation is 30-80 μm. This invention achieves efficient inhibition of zinc minerals by controlling the copper flotation separation temperature, at which waste sulfur dioxide is used synergistically as a zinc inhibitor, further controlling the particle size of the fine grinding and the foam diameter during flotation, thus constructing an integrated copper-zinc separation and zinc recovery process.

The invention discloses a method and system for establishing a cost performance evaluation model of a blast furnace gas desulfurizer, and the method comprises the steps: determining the evaluation indexes required by the establishment of the cost performance evaluation model of the blast furnace gas desulfurizer: the actual desulfurization effect S and desulfurization cost P of the desulfurizer, and then calculating the cost performance index K of the desulfurizer through the evaluation indexes, k = the actual desulfurization effect S of the desulfurizer / the desulfurization cost P; the established desulfurizer cost performance evaluation model can provide technical support for economic purchase and preferential selection of blast furnace gas desulfurizers; according to the establishment method provided by the invention, the effective indexes influencing the actual desulfurization effect of the desulfurizing agent and the effective indexes influencing the desulfurization cost are clarified, the indexes influencing the actual desulfurization effect and cost of the desulfurizing agent are quantitatively evaluated in a unified manner, a certain guiding effect is provided for optimal selection of the blast furnace gas desulfurizing agent, and the optimal desulfurizing agent can be selected in an auxiliary manner; the desulfurization cost is reduced, the desulfurization effect is improved, and the cost performance of blast furnace gas desulfurization is maximized.

The utility model discloses a waste ammonia gas recycling system which comprises a condensing tower, an ammonia gas absorption tower, an ammonia water storage tank and an ammonia desulfurization tower, a gas outlet of the condensing tower is communicated with an ammonia gas inlet of the ammonia gas absorption tower; a clear water tank is arranged at the bottom of the ammonia gas absorption tower, a produced water inlet is formed in the clear water tank, and the clear water tank is communicated with an ammonia absorption spraying pipe in the ammonia gas absorption tower through a clear water circulating pump; the clear water tank is communicated with the ammonia water storage tank; and the ammonia water storage tank is communicated with the ammonia desulfurization tower. According to the system, waste ammonia gas of the condensing tower is converted into ammonia water in the ammonia gas absorption tower, and then the ammonia water is used as a desulfurizing agent to be applied to an ammonia-process flue gas desulfurization process, so that deamination of exhaust gas of the condensing tower and desulfurization of sulfur-containing flue gas are realized, harmless emission of gas is realized, and any waste liquid, waste residue and waste gas CO2 are not generated in the process, and secondary pollution is avoided; the method also realizes treatment of wastes with wastes, reduces the ammonia water cost in the desulfurization process, can produce a desulfurization by-product ammonium sulfate, and has certain economic benefits.

The utility model discloses a compound bed type natural gas desulfurization device which comprises a first desulfurization tower and a second desulfurization tower, a first input pipe with a first input control valve and a first output pipe with a first output control valve are connected to the first desulfurization tower, and a second input pipe with a second output control valve is connected to the second desulfurization tower. The second desulfurization tower is connected with a second input pipe with a second input control valve and a second output pipe with a second output control valve, the first input pipe and the second input pipe are connected to an input header pipe, and the first output pipe and the second output pipe are connected to an output header pipe; a series pipeline mechanism is arranged between the first output pipe and the second input pipe; a desulfurization filler bed layer is arranged in each desulfurization tower, and the desulfurization filler bed layer in each desulfurization tower comprises a first desulfurization bed layer for removing inorganic sulfur and a second desulfurization bed layer for removing organic sulfur. The desulfurization device has the advantages that the desulfurization device has multiple desulfurization modes, can be selectively used according to actual requirements, is good in desulfurization effect, can effectively avoid environmental pollution, and can effectively reduce desulfurization cost.

The invention discloses a method and a system for producing iron ore concentrate and co-producing sulfuric acid by using ferrous sulfate. The method comprises the following steps: reacting a raw material limonite solution to generate ferrous sulfate and ferric sulfate, and filtering silicon slag and a ferric sulfate solution; a ferric sulfate solution enters a concentration crystallizer, the ferric sulfate solution in the concentration crystallizer is subjected to concentration crystallization to obtain a ferric sulfate solid-liquid mixed solution, solid obtained through separation is ferric sulfate crystals, the ferric sulfate crystals enter a rotary kiln, and ferric sulfate is heated and decomposed in the rotary kiln to generate ferric oxide (iron ore concentrate) and sulfur trioxide flue gas; and the sulfur trioxide flue gas enters a sulfuric acid absorption tower to absorb the sulfur trioxide gas to generate sulfuric acid. The method effectively realizes production of iron ore concentrate and co-production of sulfuric acid through limonite flue gas desulfurization, combines flue gas desulfurization and iron ore beneficiation, and solves the problems of high operation cost, repeated investment, large investment, land occupation, secondary pollution, environmental influence and the like in the two industries.

The utility model discloses a reactor and a reaction system for low-temperature catalytic decomposition of sulfur oxides, and relates to the technical field of flue gas desulfurization, in particular to a reactor and a reaction system for low-temperature catalytic decomposition of sulfur oxides, the reactor is a spherical reactor with the diameter larger than 15mm, and macropores and mesopores are uniformly distributed on the surface and inside the reactor. Macropores and mesopores are communicated with the outside of the reactor and are loaded with a catalyst, and SO2 is decomposed and removed at a low temperature of 100-130 DEG C under the synergistic effect of the catalyst and the porous structure of the spherical reactor, so that the desulfurization efficiency is remarkably improved, the energy consumption is reduced, the desulfurization cost of flue gas is reduced, and secondary pollution is eliminated.

The invention belongs to the field of flue gas purification in the field of environmental protection, and particularly relates to a method for synergistically treating various pollutants in flue gas through ultraviolet radiation. Industrial flue gas contains various pollutants such as SO2, NOx, CO, VOCs, NH3, H2S and the like, and the current processes (such as desulfurization, denitrification and the like) mostly treat a certain pollutant independently. The invention provides an ultraviolet radiation treatment method (GFSD process), which adopts ultraviolet rays with specific frequency and is combined with a light source arrangement method, so that various pollutants in flue gas can be removed at the same time. Besides, after the flue gas containing SO2 is treated by the GFSD process and then is subjected to wet desulfurization, dry desulfurization or semi-dry desulfurization, desulfurization products containing sulfate, such as calcium sulfate and magnesium sulfate, can be generated, so that the generation of sulfite (mainly calcium sulfite) after the flue gas is directly subjected to desulfurization treatment by the dry method or the semi-dry method and the like is avoided.

The present invention discloses a method for low-temperature rapid desulfurization of low-sulfur steel at a low iron-to-steel ratio, and belongs to the technical field of steel smelting. The desulfurization method mainly includes an early deoxidation treatment and two consecutive desulfurization treatments in the later stage. During the early deoxidation treatment, slag washing and deep deoxidation treatment are carried out by adding aluminum iron, lime and bauxite, so as to facilitate the later refining and desulfurization. In addition, the slag making operation of continuous foaming is added. During the two consecutive desulfurization treatments in the later stage, the power transmission gear and time are controlled to cooperate with argon gas, and the desulfurization temperature is not lower than 1540°C for precise desulfurization. Using the desulfurization method provided by the present invention, as long as the temperature of the molten steel at the station is not lower than 1515°C, the general desulfurization time can be controlled within 12-16 minutes, and the desulfurization rate of the molten steel can reach 75%-81%, which greatly reduces the desulfurization temperature and cost and shortens the desulfurization time.

The present application relates to a wet desulfurization system for treating flue gas of a glass furnace, which comprises a pretreatment mixer for mixing and pretreating glass flue gas, a desulfurization tower for desulfurizing and purifying glass flue gas, a flue gas delivery pipeline assembly for conveying glass flue gas, a glass flue gas analyzer for analyzing the composition of glass flue gas, and a desulfurization controller for controlling the desulfurization and purification of glass flue gas, wherein the pretreatment mixer, the desulfurization tower, the flue gas delivery pipeline assembly, and the glass flue gas analyzer are all connected to the desulfurization controller for communication; the desulfurization controller obtains the order information to be produced in real time to determine the production plan for the next production cycle, makes decisions to generate a production desulfurization plan, allocates absorption slurry during glass production, and controls the flue gas delivery pipeline assembly, the pretreatment mixer, and the flue gas analyzer to cooperate with the desulfurization tower to desulfurize and purify the flue gas. The present application has the effect of effectively improving the flue gas desulfurization efficiency.