90results about How to "To achieve the purpose of desulfurization" patented technology

The invention discloses a device and a method for cooling coke. The device consists of a prestorage section, a vapor cooling section, a transitional section, a physically cooling section and a discharge section, wherein the upper prestorage section and the vapor cooling section are communicated by a vaporization gas collection channel; the middle transitional section and the physically cooling section are communicated by high-temperature coolant collection channel; a rotary discharge valve of the discharge second is immersed in liquid-sealed coke quenching tank; and a coke conveying device is arranged in the liquid-sealed coke quenching tank or a belt conveyor is arranged at the outlet of the discharge valve to convey the coke to the outside. The method for cooling the coke by vapor and coke oven gases comprises: introducing the vapor into the vapor cooling section; performing vaporization and generating synthesis gases; and introducing the coke oven gases into the physically cooling section to allow the coke oven gases to absorb the sensible heat of the coke and perform physical heat exchange with the coke. The device and the method have the advantages of reducing circulating gas volume, recovering the sensible heat of high-temperature coke, generating water gas and fully utilizing resources.

The invention discloses a method and a system for treating sodium jarosite residue. The method comprises the following steps: (1) calcining a mixture containing the sodium jarosite residue, a reducing agent and a desulfurizing agent to obtain a calcined product; and (2) conducting magnetic separation on the calcined product to separate out ferronickel particles. The system comprises a calcination device suitable for calcining the mixture containing the sodium jarosite residue, the reducing agent and the desulfurizing agent, and a magnetic separation device connected with the calcination device and suitable for magnetic separation of the calcined product. The method and the system disclosed by the invention can effectively recover the ferronickel particles in the sodium jarosite residue, and achieve the purpose of desulfurization, wherein the nickel grade of the ferronickel particles is relatively high.

The invention discloses a desulphurization and denitration catalyst. The catalyst comprises the following components by mass percentage: 4 to 18 percent of CuO, 80 to 95 percent of gamma-Al2O3, and 1 to 2 percent of promoter. A method for preparing the catalyst comprises the following steps: (1) adding aluminum isopropoxide into distilled water, stirring the mixture, adding a nitric acid solution into the mixture dropwise, and carrying out the evaporation in the air to obtain a boehmite sol; (2) adding the promoter into a copper nitrate solution, then adding the mixture into the boehmite sol, then adding the nitric acid solution dropwise, stirring the mixed solution for ageing, and aggregating the mixed solution into a semi-gel; and (3) adding the semi-gel dropwise into a gel pool containing ammonia water and liquid paraffin through a dropper, and obtaining the catalyst after ageing, drying and baking. The prepared catalyst can be used for synchronous desulphurization and denitration, and can be regenerated and used cyclically with low raw material cost. As the byproducts can be reutilized, the catalyst brings about no secondary pollution.

The invention relates to a ceramic catalytic filter element for flue gas purification and a flue gas desulfurization and denitrification integrated dust removal method. The ceramic catalytic filter element is prepared from the following steps that a microporous alumina ceramic filter tube with a pore diameter of 40-80 microns is taken as a matrix; the matrix is immersed in a mixed sol made of zincacetate, and after the matrix is impregnated under a negative pressure, the matrix is roasted to obtain a modified matrix modified by zinc oxide; an equal volume impregnation method is adopted, and the modified matrix is impregnated with an mixed oxalic acid solution containing ammonium metavanadate and ammonium metatungstate, so that total loading mass of V2O5 and WO3 in pores of the matrix reaches 4.0%-6.0% to obtain an active matrix; the active matrix is immersed in a mixed sol made of Al2O3-SiO2-TiO2, the active matrix is dried and roasted after the active matrix is taken out, and a densefilm with a thickness of 0.2-0.6 millimeter and a pore diameter of 1-10 microns is formed on the outer surface of the active matrix to obtain the ceramic catalytic filter element. A denitrification catalyst of the ceramic catalytic filter element has the advantages of being strong in load, high in denitrification efficiency, long in service life and applicable to popularizing and using.

The invention relates to a desulphurization method of cracked C5 fraction. The desulphurization method of cracked C5 fraction comprises the following steps: firstly adding a desulfurizer into a cracked C5 fraction raw material, and carrying out a reaction at a certain pressure and a certain temperature for a while; separating a cracked C5 fraction which is free of sulfur from the top of a tower by a filtering and a distillation method; after reaction, obtaining a sulfur compound in a column bottom; the desulfurizer comprises the following components: 3-8% of triethanolamine, 3-8% of acetonitrile, 3-8% of toluene, 3-8% of acetone, 8-12% of benzene, 25-35% of saturated ammoniacal liquor, 8-12% of butyronityile, 8-12% of cyclohexane, 10-20% of aniline, and 3-8% of diethyltoluenediamine. According to the method, a proper amount of desulfurizer is added into the cracked C5 fraction raw material, and the purpose for desulphurization of cracked C5 fraction is realized by the methods of filtering and distillation. The method provided by the invention has a good desulphurization effect, by-products are not introduced into the desulphurized product, and the composition of the cracked C5 fraction is not changed; the desulfurizer has little toxicity and is not volatile and inflammable.

The invention discloses a desulfuration and denitration catalyst, which comprises the following components in percentage by weight: 5-15% of CuO, 80-90% of gamma-Al2O3 and 2-5% of catalyst promoter (Na2O, NiO or ZnO). The preparation method of the catalyst comprises the following steps: (1) mixing main catalyst CuO, catalyst promoter, carrier Al2O3, kieselguhr adhesive and wood-dust pore forming agent, adding water, and completely stirring into paste; (2) molding into cylindrical bodies, spherical bodies or Raschig ring bodies; and (3) drying, calcining, and activating to prepare into the catalyst. The prepared catalyst can realize the desulfuration and the denitration simultaneously, is low in the material cost, and can be recycled. Besides, the byproducts can be recycled, thereby being free of the secondary pollution.

The invention discloses a montmorillonite natural gas desulfurizer, and the main points of the technical proposal are that the montmorillonite natural gas desulfurizer is composed of montmorillonite, attapulgite clay, alumina, zinc oxide and sodiumhydroxide. The preparing method is that the burden materials of the montmorillonite natural gas desulfurizer are input into a steeping cistern and then are steeped with water after mixed together to do sodium treatment, extrusion drying, separating by breaking and sieving, baking and packaging to be a finished product. The montmorillonite natural gas desulfurizer is a columniform strip granule, which generates chemical reaction after fully contacting with the nature gas to adsorb the sulfured and cyanide in the nature gas into the columniform strip granules to greatly reduce the content of sulfured in the nature gas and adsorb free water in the nature gas. The montmorillonite natural gas desulfurizer has a simple production process, a low cost and a great economic benefit and social benefit, and is acceptable for the desulfurizing process of nature gas, coal gas and marsh gas.

A composite sulfur-curing agent consists of lime powder, industrial cinder and micro-silicon powder. It's cheap and efficient, has less sulfur dioxide, acid rain and no environmental pollution.

The invention discloses a green devulcanizing and reclaiming apparatus with supercritical CO2 and microwave assisted multi-segment twin-screw extrusion, comprising a horizontal barrel; a twin-screw is rotationally mounted in the barrel; the barrel is provided with a feed port at the left upper end of the twin-screw, and the upper end of the barrel is fitted ith a microwave heating device; the middle of the barrel is provided with a gas injection end for supplying supercritical CO2; the rear end of the barrel is provided with a cooling extruder, the tail end of the cooling extruder is fitted with a dicing device, and a discharge port of the dicing device is provided with a product packaging device. The apparatus of the invention has simple structure, uses small floor area, is full-automatically controllable, low in production process energy consumption and green, and the defect that traditional reclaimed rubber production process has high contamination, high energy consumption, intermittence, high labor intensity and unstable product properties is effectively solved.

A process for desulfurizing and dusting the fume by wet method includes such steps as introducing the fume to the bottom of absorption tower, cooling it by water evaporating, mixing with washing liquid in counterflow mode, liquid drops separating at the top of reaction tower, and exhausting clean fume.

The invention discloses a method for wet desulphurization in a CFB boiler, especially relates to a wet desulphurization method suitable inside a CFB boiler of 1000t/h level and below in a 350MW power plant, and belongs to the technical field of environmental protection. According to the method for wet desulphurization in a CFB boiler, industrial waste calcium carbide slurry and/or calcium carbide dedusting ash are/is used as a desulfurizer, and water is added to prepare a paste desulfurizer; through conveying equipment, the paste desulfurizer is injected into the CFB boiler; and combustion inside the CFB boiler is regulated so as to finish the desulphurization process. The invention has characteristics of less investment in equipment, simple operation, high desulphurization efficiency, reliable operation, etc. By the method, secondary pollution of a desulfurizer or desulphurization sewage to the environment can be reduced. The method is a brand-new circulating fluidized bed boiler flue gas desulfurization method, provides a brand-new approach to desulphurization for a circulating fluidized bed boiler of 1000t/h level and below, and has good social and economic benefits.

The invention discloses a waste incineration flue gas treatment system which comprises an incinerator, a desulfurization/dedusting integrated device, an adsorption device, a deodorization device, a sewage tank, a sedimentation tank, a sand filtering tank and an alkaline liquid tank, wherein a gas outlet of the desulfurization/dedusting integrated device of the waste incineration flue gas treatment system is connected with a gas inlet of the adsorption device, a gas inlet of the desulfurization/dedusting integrated device is communicated with an exhaust port of the incinerator through a flue, and a sewage outlet is communicated with the sewage tank; a flue gas outlet of the adsorption device is connected with a flue gas inlet of the deodorization device; and a flue gas outlet of the deodorization device is arranged below a filtering layer of the sand filtering tank through a fan and an exhaust pipe. In the invention, the spray levels of a desulfurizing tower are effectively reduced to achieve an aim of lowering the height of the desulfurizing tower; and moreover, the dedusting effect can be effectively improved.

The invention discloses bainite rail steel with an ultra-low aluminium content and high strength and a production method thereof. The rail steel comprises the chemical components of, by weight, 0.10%-0.25% of C, 1.50%-1.90% of Si, 1.40%-1.90% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 1.10%-1.50% of Cr, 0.40-0.70% of Mo, 0.40%-0.75% of Ni, 0.04%-0.15% of V, less than or equal to 0.004% of Alt and the balance Fe and unavoidable impurities. The production method adopts top-bottom combined blowing converter smelting, LF refining and RH vacuum treatment, the totalaluminum content of the bainite rail steel can be effectively controlled below 40*10<-4>%, and the harm of alumina inclusions in the steel is effectively reduced.

The invention discloses a treatment device for non-ferrous metal smelting exhaust gas and relates to the technical field of non-ferrous metals. The treatment device comprises an afterheat recovery tank, wherein a vulcanization column is arranged at one side of the afterheat recovery tank, a first pipeline is mounted at a joint of the afterheat recovery tank and the vulcanization column, an electrostatic dust collection box is mounted at one side of the vulcanization column, a second pipeline is mounted at a joint of the vulcanization column and the electrostatic dust collection box, and an activated charcoal adsorption box is arranged at one side of the electrostatic dust collection box. According to the treatment device, the structure is reasonable, and the cost is relatively low; throughthe arranged afterheat recovery tank, afterheat of flue gas can be recycled; through the arranged vulcanization column, sulfur dioxide can be effectively removed from the flue gas to achieve the aimof exhaust gas desulfurization; through the arranged electrostatic dust collection box, dust and solid particles can be effectively removed from the flue gas to achieve the work of dust collection; and through the arranged activated charcoal adsorption box, the exhaust gas is further subjected to purifying treatment, the purification effect of the exhaust gas is improved, and the energy-saving andenvironment-friendly effects are remarkable.

The present invention relates to a coal saving agent and a preparation process thereof, wherein the coal saving agent comprises, by weight, 6-12% of catalyst, 1-7% of a combustion-supporting agent, 25-35% of a penetrant, 25-35% of a leavening agent, 7-15% of a cleaning agent, 10-20% of a dispersing agent, and 7-12% of a sulfur-fixing agent. According to the present invention, the coal saving agent has effects of furnace combustion condition improving, coal seam gas permeability improving, complete coal combustion, coal-fired thermal efficiency improving, smoke dust emission reducing, heat conduction efficiency improving, sulfur fixing, smoke reducing, CO and SO2 emission reducing and environmental pollution reducing so as to achieve the purposes of combustion supporting, sulfur fixing, energy saving and desulfurization, wherein the coal can be saved by 5-10%, the fire power can be increased by more than or equal to 10%, the carbon deposition can be eliminated by 50-90%, and the sulfur can be reduced by 20-50%.

The invention provides an inflammable gas detecting instrument and a desulphurization method thereof, wherein the detecting instrument comprises a microprocessor circuit, a catalytic sensor connected with the microprocessor circuit, and an output voltage controllable power supply circuit; a sensor voltage output end of the output voltage controllable power supply circuit is connected with a power source end of the catalytic sensor, and an voltage control end of the microprocessor circuit is connected with a sensor voltage adjustment control end of the output voltage controllable power supply circuit; the desulphurization method comprises the following steps: the microprocessor circuit controls the output voltage controllable power supply circuit for voltage adjustment; the output voltage of the sensor voltage output end is improved to 1.5 times of the normal working voltage and the time is delayed for 120s; the output voltage controllable power supply circuit is continued to be controlled so as to enable the output voltage of the sensor voltage output end to be zero or normal working voltage. The detecting instrument has the advantages of automatic desulphurization, accurate measuring result, safety and reliability; furthermore, the desulphurization method is simple and practical, and is easy to realize.

The invention provides a device and a method for high-sulfur bauxite suspension roasting oxidative desulfurization. The device comprises a stock bin, a spiral feeder, a primary cyclone separator, a suspension roasting furnace, a secondary cyclone separator and dust removal and desulfurization equipment. The method comprises the following steps that (1) high-sulfur bauxite is crushed and dried in the stock bin; (2) an induced draft fan is started to form negative pressure in a system; (3) natural gas and air is introduced into a burner, and ignited to form high-temperature oxidizing gas; (4) high-sulfur bauxite powder is fed into the primary cyclone separator, and generated primary solid materials are enabled to enter a suspension roasting furnace; (5) the primary solid materials are oxidized and roasted, and the reacted materials are fed into the secondary cyclone separator; and (6) second-stage solid materials are discharged through a discharging pipe. The method is simple in processflow, low in comprehensive energy consumption, high in gas-solid mass transfer and heat transfer efficiency, stable in product property, and high in production efficiency.

The invention discloses a desulfurization assistant which is prepared from the following raw materials in parts by weight: 10-20 parts of iron oxide, 10-20 parts of barium nitrate, 10-20 parts of phosphorus pentoxide, 5-10 parts of potassium persulfate, 5-10 parts of sodium hexametaphosphate, 5-8 parts of sodium diacetate, 2-5 parts of potassium oxalate, 5-10 parts of sodium hypophosphite, 5-10 parts of sodium tripolyphosphate, 5-10 parts of methyl acetate, 2-5 parts of butyric acid, 5-10 parts of croscarmellose sodium, 3-5 parts of methylcellulose, 1-5 parts of Tween 80 and 200-250 parts of water. According to the desulfurization assistant disclosed by the invention, sulfide layer and salt layer which are attached to coal are stripped off, infiltrated and dispersed by the acidity and excellent complexing capacity of the carried active group; and a sulphur element is complexed in a cleaning agent to reach the targets of coal washing and desulfurization. The desulfurization assistant is good in desulfurization effect and the environment is not polluted.

The invention belongs to the field of atmospheric purification and environmental protection, and particularly relates to a desulfurization method and a desulfurization device for industrial mixed gas.The desulfurization method of the industrial mixed gas provided by the invention comprises the following steps: enabling the industrial mixed gas to be in contact with an organic sulfur hydrolytic agent and a hydrogen sulfide adsorbent in sequence for desulfurization, so as to obtain desulfurized industrial mixed gas, a desulfurized organic sulfur hydrolytic agent and a desulfurized hydrogen sulfide adsorbent; and sequentially contacting the desulfurized industrial mixed gas with a desulfurized hydrogen sulfide adsorbent, a deoxidizing agent and a desulfurized organic sulfur hydrolytic agentto regenerate the desulfurized hydrogen sulfide adsorbent and the desulfurized organic sulfur hydrolytic agent. According to the desulfurization method, online continuous regeneration of the organic sulfur hydrolytic agent and the hydrogen sulfide adsorbent is realized, and the defects that the organic sulfur hydrolytic agent and the hydrogen sulfide adsorbent need to be continuously replaced, theprocess is complex and resources are wasted are avoided.

The invention relates to a horizontal dense-phase circulating fluidizing dry-tower flue-gas desulfurization device belonging to the field of environmental engineering. The horizontal dense-phase circulating fluidizing dry-tower flue-gas desulfurization device comprises a circulating fluidizing chamber (1), a dense-phase chamber (2), a Roots blower (3), a feeding pipe (4), a flue gas inlet (5), a booster fan (6) and a bag-type dust collector (7) and is characterized in that a stirring shaft (8), a gas pipe (9) and a gas distribution pipe (10) are arranged, wherein the stirring shaft (8) is mounted in the dense-phase chamber and provides more collision chances for a desulfurizer and the flue gas in the dense-phase chamber so as to improve the desulfurization efficiency; the gas pipe (9) is connected with the Roots blower for providing the circulating fluidizing chamber and the dense-phase chamber with fluidized wind power; and the gas distribution pipe (10) is mounted at the tail ends of the gas pipe (9) and the feeding pipe (4), and the wind power of the Roots blower is blown to all directions through the gas distribution pipe (10). The invention solves the problems of higher energy consumption, easy foot pedal blockage, great occupied area, and the like existing in the traditional dense-phase circulating fluidizing dry-tower desulfurization device and improves the desulfurization efficiency.

The invention relates to a coal-saving agent and a preparation process thereof. The coal-saving agent comprises, in weight percent, 6-12% of catalysts, 1-7% of combustion improvers, 25-35% parts of penetrating agents, 25-35% parts of bulking agents, 7-15% of cleaners, 10-20% of dispersing agents and 7-12% of sulfur fixing agents. According to the coal-saving agent, combustion conditions of a furnace body can be improved, coal seam permeability is enhanced, coal is sufficiently combusted, coal burning heat efficiency is improved, soot emission volume is reduced, heat transmission efficiency isimproved, sulfur is fixed, smoke is reduced, emission of CO and SO2 is reduced, environmental pollution is reduced, so that combustion is facilitated, the sulfur is fixed, energy is saved, the sulfuris removed, coal can be saved by 5%-10%,heat power is improved by 10% or more, carbon deposit is removed by 50-90%, and the sulfur is reduced by 20-50%.