79results about How to "Reduce sulfur content" patented technology

The invention belongs to the technical field of new energy materials, and particularly relates to a low-sulfur metal cation doped ammonium manganese ferric phosphate precursor, carbon-coated modified sodium manganese ferric pyrophosphate and a preparation method and application thereof. According to the invention, the low-sulfur metal cation doped ammonium manganese ferric phosphate precursor is successfully prepared. A proper amount of phosphoric acid source is added into the prepared metal cation doped ammonium manganese ferric phosphate precursor for treatment, so that the sulfur content of the precursor is remarkably reduced, and the molar ratio of manganese, iron, doped elements and phosphorus elements is regulated and controlled to be slightly smaller than 1. The atomic-scale distribution of elements in the precursor is realized, the tap density is also improved, and the subsequent preparation of a high-performance carbon-coated modified manganese ferric sodium phosphate pyrophosphate material is facilitated. The sodium ion battery constructed based on the material has excellent charge-discharge capacity, capacity retention ratio and cycling stability. In addition, the preparation method of the precursor is simple and convenient to operate and easy to control, and has the advantage of wide application.

The recovery method of the laterite-nickel ore leaching residues comprises the following steps that S1, in the presence of a first reducing agent, the laterite-nickel ore leaching residues are roasted, and roasted sand and sulfur-containing tail gas are obtained; s2, in the presence of a second reducing agent, smelting the roasted product obtained in the step S1 to obtain molten iron, smelting slag and coal gas; the laterite-nickel ore leaching residues are in a dry state; the smelting slag is a MgO-Al2O3-SiO2-FeO slag system, and the smelting slag is a MgO-Al2O3-SiO2 The ratio of the total mass of fixed carbon in the first reducing agent to the total mass of sulfur in the laterite-nickel ore leaching residues is 0.35-0.50. According to the recycling method, iron and sulfur in the laterite-nickel ore leaching residues can be comprehensively recycled under the condition that extra flux is not needed, resource utilization of the laterite-nickel ore high-pressure leaching residues is achieved under the condition that the overall process cost is low, and large-scale industrial use is facilitated.

The invention discloses an aviation kerosene production method based on vinasse waste, and belongs to the technical field of kerosene preparation, and the aviation kerosene production method comprises the following steps: pretreatment: screening and cleaning vinasse, removing impurities and water, then crushing the cleaned vinasse into particles, and drying and baking by using drying equipment; pyrolyzing: feeding the pretreated vinasse into a pyrolyzing furnace for pyrolyzing; gas purification: purifying the separated gas to remove sulfides and nitrides in the gas; fischer-Tropsch synthesis reaction: introducing the purified gas into a Fischer-Tropsch synthesis reactor to form hydrocarbon molecules; separating products: separating hydrocarbons in different boiling point ranges; product refining: further processing the separated hydrocarbon products; waste treatment: solid carbon black generated in the pyrolysis process is recycled. The device provided by the invention can reduce the dependence of existing aviation kerosene production on traditional fossil fuel, saves energy, reduces carbon emission, and is beneficial to sustainable development.

The invention provides a low-sulfur manganese-silicon alloy and a production method thereof.The method comprises the steps that silica, coke and manganese ore are crushed and then mixed with lime, and smelting raw materials are obtained; a closed electric furnace is filled with smelting raw materials for smelting, and alloy melt is obtained; the alloy melt is transferred into a ladle, a desulfurizing agent is added for the desulfurization process, and manganese-silicon alloy molten iron is obtained; and the manganese-silicon alloy molten iron is poured into a mold for ingot casting, and a manganese-silicon alloy finished product is obtained after cooling. According to the method, the method capable of effectively reducing the sulfur content in the manganese-silicon alloy is provided through the steps of raw material crushing and mixing, in-furnace power transmission refining, out-of-furnace desulfurization, casting molding and the like, the low-sulfur manganese-silicon alloy is produced, and therefore control over the sulfur element content in a steelmaking product is facilitated.

The invention belongs to the technical field of new energy materials, and particularly relates to a low-sulfur cation-doped ferromanganese pyrophosphate precursor, carbon-coated modified lithium ferromanganese phosphate as well as a preparation method and application of the low-sulfur cation-doped ferromanganese pyrophosphate precursor and carbon-coated modified lithium ferromanganese phosphate. According to the invention, the low-sulfur cation doped ferromanganese pyrophosphate precursor is successfully prepared. A proper amount of phosphoric acid source is added into the prepared metal cation doped ammonium manganese ferric phosphate precursor for treatment, so that the sulfur content is effectively reduced, the molar ratio of manganese, iron, doped elements and phosphorus elements is regulated and controlled to be slightly smaller than 1, and the tap density of the precursor is effectively improved. The precursor can effectively inhibit generation of gas in the high-temperature sintering process, the hole defect is avoided, the compactness of the structure of the prepared carbon-coated modified lithium manganese iron phosphate material is ensured, and the cycling stability of the material is remarkably improved. The lithium ion battery constructed based on the material shows excellent electrochemical performance. In addition, the precursor is simple in preparation process, high in raw material conversion rate and suitable for industrial production.

The invention discloses a sulfur-free FR-4 copper-clad plate and a preparation method thereof, and belongs to the technical field of copper-clad plates. The copper-clad plate is prepared from sulfur-free epoxy resin, a sulfur-free curing agent, a sulfur-free flame retardant, organic silicon hybrid macromolecules, tetrafunctional epoxy resin, linear phenolic resin, microencapsulated ammonium polyphosphate, melamine cyanurate, surface grafting modified boehmite nanorods and filler. Through the design of a sulfur-free system, the sulfur content of the product is lower than 50 ppm, and the problems of contact resistance increase, unstable signal transmission and the like caused by sulfide migration of a traditional FR-4 copper-clad plate in a high-temperature and high-humidity environment are thoroughly solved. Meanwhile, the organic silicon hybrid macromolecules and the high-functionality epoxy resin have a synergistic effect, so that the balance of high glass transition temperature and high toughness is realized. The copper-clad plate has excellent dielectric property, flame retardant property and long-term reliability, and meets the development requirements of high reliability and high performance of electronic products.

A demisting cleaning mechanism comprises an exhaust pipe, the exhaust pipe is fixedly communicated with one side of a desulfurization box, an exhaust fan is fixedly mounted in the exhaust pipe, the end part of the exhaust pipe is communicated with a water-cooling demisting box, a demister body is fixedly mounted in the water-cooling demisting box, and the demister body is fixedly mounted in the demister body. The demister comprises a demister body, a rotary cold water pipe is rotationally connected into the demister body, an annular water pipe sleeves the rotary cold water pipe, a fixed box is rotationally connected to one end of the rotary cold water pipe, a first bevel gear is fixedly mounted at one end of the rotary cold water pipe, and a water inlet pipe is fixedly connected to one side of the fixed box; a hollow rotating shaft is fixedly installed between the water inlet pipe and the rotating cold water pipe, a second bevel gear is meshed with the bottom of the first bevel gear, a rotating shaft is fixedly connected with the bottom of the second bevel gear, a fixing shell is fixedly connected with the bottom of the water-cooling demisting box, and the cleaning effect of the device is good.

The invention provides a smelting reduction furnace gas energy recovery and desulfurization coupling system which comprises a smelting reduction furnace with a gas discharge end; the gas turbine device is provided with a first gas input end and a first gas output end, the first gas input end is communicated with the gas discharge end, and the gas turbine device is used for converting pressure energy of gas into mechanical energy; the coal gas fine desulfurization device is provided with a second coal gas input end and a second coal gas output end, the second coal gas input end is communicated with the first coal gas output end, and the coal gas fine desulfurization device is used for carrying out desulfurization treatment on the coal gas. The smelting reduction furnace gas energy recovery system provided by the invention can be used for recovering gas complementary energy, reducing the sulfide content in the gas, improving the cleanliness of the gas, improving the quality of the gas and the utilization efficiency during subsequent reutilization, and being beneficial to reducing the sulfur content of flue gas generated after the gas is reutilized; and the requirement of the ultra-low emission standard of the flue gas is met.

The application relates to the technical field of ultrahigh-strength steel, and provides an ultrahigh-strength weather-resistant steel bar and a production method thereof.The production method of the ultrahigh-strength weather-resistant steel bar comprises the following steps: preheating waste steel, smelting the waste steel after preheating and smelting auxiliary materials in an electric arc furnace, controlling a smelting end point, transferring the molten steel after electric arc furnace smelting into an LF refining furnace, adding stainless steel waste into the LF refining furnace for refining, adding alloy fine-tuning components, controlling the molten steel component at the refining end point, performing whole-process protective casting on the molten steel after refining, obtaining a continuous casting billet, performing rolling, tempering and cooling treatment on the continuous casting billet after heat supplement, and obtaining the ultrahigh-strength weather-resistant steel bar.The ultrahigh-strength weather-resistant steel bar has a finished product tensile strength Rm of greater than or equal to 1000 Mpa, a yield strength Rel of greater than or equal to 800 Mpa, and a breaking elongation A of greater than or equal to 10%.

The utility model discloses a kind of gas tank dry gas desulfurization systems.The system includes: low temperature absorption tower, in which raw material gas tank dry gas and low temperature absorption oil countercurrent contact;Primary amine liquid absorption tower, in which utilize amine liquid to remove hydrogen sulfide in dry gas after organic sulfur is removed;Hydrolysis reactor, in which carbonyl sulfur in primary absorption tail gas is hydrolyzed, and hydrolysis tail gas is obtained;Secondary amine liquid absorption tower, in which utilize lean amine liquid to remove hydrogen sulfide in hydrolysis tail gas, and after absorption, purified dry gas is obtained.The desulfurization system of the utility model can purify and remove organic sulfide and hydrogen sulfide in dry gas, reduce sulfur content in gas, and then reduce SO2 content in flue gas discharged from heating furnace of subsequent each device, ensure that heating furnace of whole plant is safe, environmental protection, high efficiency and stable operation.

The application discloses a dry gas deep desulfurization process. The process comprises the following steps: (1) removing hydrogen sulfide from refinery dry gas through a first-stage amine liquid absorption tower; (2) removing organic sulfur from tail gas of the first-stage amine liquid absorption tower in a low-temperature absorption tower; (3) sequentially exchanging heat between the absorption tail gas and raw dry gas, and between the absorption tail gas and hydrolysis tail gas, and then heating the absorption tail gas, and then inputting the absorption tail gas into a hydrolysis reactor to convert carbonyl sulfur into hydrogen sulfide; and (4) inputting the hydrolysis tail gas into a second-stage amine liquid absorption tower, and countercurrently absorbing the hydrolysis tail gas with lean amine liquid in the tower to remove hydrogen sulfide in the dry gas. The application can purify and remove sulfides in the dry gas, reduce the content of organic sulfur and hydrogen sulfide in the gas, reduce the content of SO2 in flue gas discharged from a heating furnace of each subsequent device, and ensure safe, environmentally-friendly and efficient and stable operation of the heating furnace of the whole plant.

The invention relates to a hydrocarbon stream extraction desulfurization method and system combined with gasoline production. The method comprises the following steps: (1) carrying out alkali extraction on a hydrocarbon stream to obtain a hydrocarbon stream product and a mercaptan-containing alkali solution; (2) oxidizing the thiol-containing alkali liquor to obtain disulfide-containing alkali liquor; (3) contacting the disulfide-containing alkali liquor with a first selective solvent, and separating to obtain lean alkali liquor and the first disulfide-containing selective solvent; (4) contacting the lean alkali liquor with a second selective solvent for reverse extraction to obtain regenerated alkali liquor and a second disulfide-containing selective solvent; (5) fractionating the low-carbon liquid hydrocarbon and / or at least part of the hydrocarbon flow product to obtain a C5 fraction, and using the C5 fraction as a second selective solvent; the first selective solvent in the step (3) comprises part of the second disulfide-containing selective solvent. The hydrocarbon stream product with lower sulfur content is obtained, and the disulfide-containing selective solvent is absorbed in gasoline and then is subjected to desulfurization refining, so that the C5 fraction is converted into the gasoline fraction to be utilized.

The invention relates to a renewable energy technology, in particular to a catalyst applied to a preparation method of biological ship fuel, and the catalyst is a sulfonated carbon catalyst. The sulfonated carbon catalyst is prepared by the following steps: S1, soaking biodiesel waste in n-hexane, standing overnight, and dissolving grease; s2, filtering the dissolved biodiesel waste to obtain an oil-solvent mixture and residues; s3, separating and recovering the solvent and oil from the oil-solvent mixture through a rotary evaporator, and pyrolyzing residues in a tubular rotating bed reactor to obtain a carbonized product and pyrolysis gas; and S4, mixing the carbonized product with concentrated sulfuric acid for reaction to generate the sulfonated carbon catalyst. According to the method, efficient resource utilization of waste is achieved, the produced recycled oil is used for preparing the biological ship fuel, a high-performance catalyst with high adaptability is provided for sustainable biological ship fuel production, the cost is low, the conversion efficiency is high, and the economic benefit is good.

The invention relates to a method for enhancing the magnetism of sulfur-containing copper separation tailings by microwave treatment, and belongs to the technical field of resource utilization of the copper separation tailings, the method comprises the following steps: S1, crushing and sieving: crushing the copper separation tailings with the sulfur content of 1%-15% and copper tailings by using a jaw crusher to obtain crushed blocks, the crushed blocks are ground and smashed through a ball mill, and tailings are obtained after screening; and S2, carbon powder and a microwave hot spot exciting agent are added into the tailings, uniform stirring is conducted, the stirring speed is controlled to be 13 rpm, and the stirring time is controlled to be 20 min. Corresponding metal and non-metal elements are selectively heated under a microwave field, roasting of iron minerals in the copper separation tailings can be completed within a short time, iron sulfide minerals and hematite are converted into iron minerals with high ferrous oxide content, the magnetic rate of the tailings is increased, the sulfur content is reduced, the utilization difficulties that the copper separation tailings are weak in magnetism and high in sulfur content are solved, and the utilization rate of the copper separation tailings is increased. And after treatment, a foundation can be provided for comprehensive utilization of the copper separation tailings.

The invention discloses a waste mineral oil multistage coupling heat exchange and gradient cooling energy-saving cooperative treatment method, which belongs to the technical field of heat energy engineering and energy conservation, and comprises the steps of pretreatment refining, fractionation cutting, molecular distillation, hydrofining, gradient cooling and intelligent control. By constructing a multi-stage coupling heat exchange network, hydrofining high-temperature waste heat is used for preheating fractionation feed, and fractionating tower top steam waste heat is used for preheating molecular distillation feed; cooling the high-temperature material flow according to the temperature by stages through a three-stage gradient cooling system, and recycling the low-temperature cold energy of the molecular distillation unit for a pretreatment process; and dynamically optimizing heat exchange and cooling operation based on an energy balance model through the central control system. According to the method, the technical problems of energy utilization splitting and serious waste heat waste in a waste mineral oil regeneration process are solved, the yield and the quality of a base oil product are greatly improved while the system energy consumption and the cooling water consumption are remarkably reduced, and an innovative solution is provided for efficient regeneration of the waste mineral oil.

The invention relates to the field of aviation fuel, and discloses a high-flash-point jet fuel and a production method thereof. The method comprises the following steps: mixing raw material oil with hydrogen, and feeding the mixture into a hydrofining reactor containing a hydrofining catalyst for hydrofining reaction to obtain a refined effluent; wherein the raw material oil is straight-run diesel oil, the density of the raw material oil at 20 DEG C is 820-840 kg / m < 3 >, and the sulfur content is not greater than 1.0 wt%; introducing the refined effluent into a hydrocracking reactor containing a hydrocracking catalyst, carrying out a hydrocracking reaction, and fractionating the obtained cracked effluent to obtain a naphtha fraction, a kerosene fraction, a diesel fraction I and a diesel fraction II; and carrying out gas-liquid separation on the diesel fraction I to respectively obtain a light component which can be circulated for fractionation and a heavy component which is taken as a high-flash-point jet fuel product and is discharged from the device. According to the method, the high-flash-point jet fuel can be stably produced at low cost, the flash point of the high-flash-point jet fuel is higher than 60 DEG C, and the quality of the high-flash-point jet fuel product is improved.

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 method for removing impurity selenium in a carbonylation alloy enriched noble metal material, which comprises the following steps: S1, carrying out pulpifying washing on platinum concentrate with water until the pH value is 7, carrying out filter pressing separation, and drying filter residues until the water content is less than 0.5%; s2, carrying out oxidation absorption treatment by adopting an oxidation furnace, cooling to obtain oxidation furnace residues and secondary water, and collecting the oxidation furnace residues as platinum concentrate to be delivered to the next process for separation and purification of platinum, palladium and gold products; s3, absorbing the secondary water through an absorption tower to obtain an absorption liquid and filter residues which are relatively high-grade crude selenium, adjusting the pH value of the filtered liquid to 1.8-2.2 by using hydrochloric acid, heating to 85-92 DEG C, introducing sulfur dioxide for reduction, detecting the reduction end point by using thiourea, stopping reduction when the detected solution is colorless to obtain a 99.9% refined selenium product, and enabling the filtrate to pass through the absorption tower to obtain the 99.9% refined selenium product. And after absorption, entering the step S3 again.

The invention discloses a method for preparing a lithium ion battery negative electrode material from high-sulfur coke, which comprises the following steps of: firstly, coarsely crushing the high-sulfur coke, mixing the high-sulfur coke with reducing metal powder, and performing low-temperature calcination in a methane atmosphere to perform desulfurization reaction; then demagnetizing, crushing, grading and graphitizing the calcined reaction product; and finally, fusing the graphitized product by using a modifier, and carbonizing to obtain the lithium ion battery negative electrode material prepared from the high-sulfur coke. According to the method, the desulfurization rate of the petroleum coke can be effectively improved, the sulfur content in the high-sulfur petroleum coke can be remarkably reduced, and defects caused by removal of organic components in the raw material coke can be repaired to a certain extent, so that a more regular graphite layered structure can be obtained through a graphitization process; the material is modified and coated by adopting a fusion process, and better coating uniformity is provided for the product, so that the lithium ion battery negative electrode material obtained after the precursor D is fused and modified has excellent electrochemical performance.

The present invention provides a method for preparing cosmetic-grade white oil, the method comprising the following steps: (1) after mixing raw oil with hydrogen, sequentially performing a first catalytic reaction and a second catalytic reaction to obtain a reaction product; the catalysts used in the first catalytic reaction and the second catalytic reaction are both non-precious metal sulfide catalysts; (2) the reaction product is sequentially subjected to gas-liquid separation and distillation to obtain the cosmetic-grade white oil. The catalyst used in the preparation method of the present invention is low in cost, the preparation process is simple, and the cosmetic-grade white oil finally obtained has low viscosity and high quality. Moreover, the application of the preparation method of the present invention only requires changing the catalyst grading scheme of the original reactor or adding a supplementary refining reactor, without adding a circulating hydrogen system, which is beneficial to the upgrading and transformation of white oil production enterprises.

The present invention belongs to the field of metallurgy, and specifically relates to a launder with multiple filter screens for a vacuum induction melting furnace. According to weight percentage, the launder body material is a mixture of 54.5-56.5% magnesium oxide, 33-35% aluminum oxide, 8.8-9.0% calcium oxide, 1-1.2% aluminum, 0.3-0.6% boron nitride, and 0.3-0.6% boric acid; according to weight percentage, the filter screen material of the launder is 44.5-46.5% aluminum oxide, 33-35% magnesium oxide, 18.8-19% calcium oxide, 1-1.2% aluminum, and 0.4-0.6% boron nitride. The launder structure with multiple filter screens for the vacuum induction melting furnace provided by the present invention can not only realize multi-stage filtration of high-temperature alloys to improve the purity, but also realize deoxidation, desulfurization and denitrification during the pouring process of the vacuum induction melting furnace by improving the launder and filter screen formula, so that the purity of the molten steel is further improved, and the purity is improved by 50%, and the probability of the launder cracking will not occur until 10 times of use.

The invention discloses a method for refining low-carbon low-sulfur steel through vacuum carbon deoxidation, and relates to the technical field of molten steel external refining. The process method comprises the following steps: carrying out pre-deoxidation by adopting a carbon source alloy material without using a metal deoxidation material; vacuum carbon deoxidation treatment is carried out under the condition that the vacuum degree is smaller than or equal to 100 Pa; the flow of the stirring gas is controlled to be 0.2-1.0 NL / (t.min); controlling the vacuum holding time to be not more than 5 minutes and the vacuum period to be not more than 15 minutes; the method comprises the following steps: controlling the tapping temperature of a primary smelting furnace to be 1620-1680 DEG C; in the LF station refining process, the binary alkalinity of refining slag is controlled to be 5.0-8.0, and diffusion deoxidation and white slag making are conducted in cooperation with a metal deoxidizing agent; the low-carbon and low-sulfur steel is produced through organic combination of vacuum carbon deoxidation and LF refining on the premise that a metal deoxidation material is not used for pre-deoxidation, the total oxygen content in the steel can be controlled to be 15 ppm or below, and the sulfur content can be controlled to be 0.005% or below.

The carbon dioxide top and bottom blowing system comprises a liquid carbon dioxide storage tank, a heater, a buffer tank, a top blowing pipeline and a bottom blowing pipeline, a liquid carbon dioxide outlet end at the bottom of the carbon dioxide storage tank is connected to a feeding hole of the buffer tank through a pipeline; and the heater is arranged on a pipeline between the liquid carbon dioxide outlet end at the bottom of the carbon dioxide storage tank and the buffer tank. According to the system, carbon dioxide can react with carbon in molten steel, so that the carbon content is reduced, the consumption of oxygen is reduced, the production cost is reduced, and compared with argon, the carbon dioxide is generally cheaper, so that the production cost can be reduced by using the carbon dioxide; in addition, the carbon dioxide can react with sulfur in the molten steel to generate compounds such as calcium sulfide, so that the sulfur content in the steel is reduced, the quality of the steel is improved, and the nitrogen content in the molten steel can be reduced and the quality of the steel can be improved because the carbon dioxide does not contain nitrogen.

The invention relates to the field of biomass fuels, and provides a new energy biomass coupling fuel and a preparation method thereof, the fuel is specifically formed by mixing and processing straws, other agricultural and forestry wastes and coal; wherein the straw and other agricultural and forestry wastes account for 10%-90% by weight, and the corresponding coal accounts for 90%-10% by weight; meanwhile, the production process comprises the steps of a) mixing, b) crushing, c) impurity removal, d) drying and e) cooling. According to the invention, different proportions correspond to different heat values, the use in multiple fields is met, the use range is expanded, the volatile value is stable, the emission of harmful gas is reduced on the basis of greatly reducing the sulfur content, and the basic national policy of energy conservation and emission reduction in China at present is met.

The present invention provides a method for resource utilization of laterite nickel ore acid leaching residue, and relates to the technical field of high-value comprehensive utilization of laterite nickel ore. The method specifically comprises: S1: acid leaching treatment of laterite nickel ore, S2: pre-neutralization and iron precipitation, filtration, S3: aluminum removal, nickel and cobalt precipitation treatment, S4: carbonization and desulfurization treatment, S5: iron concentrate powder quality improvement treatment, S6: sulfate solution carbonization transformation treatment. Compared with other traditional methods, the method of the present invention, in particular, the iron element component in the prepared iron concentrate is effectively utilized and the sulfur element is effectively reduced, the grade of the iron concentrate is higher, the preparation process is short, the cost is low, the efficiency is high, there will be no by-products that affect the environment or have low economic value, and it is conducive to large-scale industrial production and promotion.

A high-temperature SCR (Selective Catalytic Reduction) denitration system of a biomass incinerator relates to the technical field of denitration of biomass incinerators, and is characterized in that an SCR reactor is arranged between a boiler body superheater and a high-temperature economizer, and flue gas generated by the biomass incinerator is directly heated by the superheater and then enters the SCR reactor for denitration; an alkali metal detection system and a catalyst cleaning system are arranged to prevent catalyst alkali metal ion poisoning, in addition, a pre-desulfurizer is arranged in front of the SCR reactor for desulfurization treatment to prevent denitration catalyst sulfur poisoning, and meanwhile, a multi-tube dust remover is arranged between the pre-desulfurizer and the SCR reactor to improve the purification rate of smoke dust and particulate matter. According to the invention, heat compensation and temperature rise are not needed, the system resistance loss is small, the comprehensive energy consumption of flue gas desulfurization and denitration can be reduced, and the denitration catalyst alkali poisoning can be effectively prevented.

The utility model discloses a novel energy-saving and environment-friendly desulfurization boiler, which relates to the technical field of desulfurization boilers, comprises a boiler body, and is characterized in that an air inlet pipe is arranged on the outer surface of the boiler body, an exhaust pipe is arranged at the top end of the boiler body, a fixed column is connected to the inner bottom side of the boiler body, and the fixed column is connected with an exhaust pipe. According to the boiler, through cooperation between the multiple desulfurization fixing bases in the boiler body and the fixing column, multiple times of spraying of a desulfurization agent can be conducted on rising flue gas, sulfur in the flue gas is removed, and then more flue gas is discharged, so that desulfurization purification treatment of boiler waste gas is achieved; and through cooperation of a plurality of gas leakage holes in the surface of the partition plate and adjusting holes, the purified flue gas can be exhausted upwards, and the spraying time of the flue gas can be conveniently adjusted according to the concentration of the waste gas, so that the purification and desulfurization effects on the flue gas are better, and the sulfur content in the waste gas is reduced.

This invention discloses a combined production process and system for co-producing needle coke and low-sulfur petroleum coke. The combined production process includes the following steps: a catalytic slurry is mixed with ethylene tar and subjected to a hydrogenation reaction; the hydrogenation reaction products are separated to obtain gas, naphtha, hydrogenated wax oil, and hydrogenated tail oil; the hydrogenated wax oil enters a cracking unit for a cracking reaction; the cracking reaction products are separated to obtain light oil, middle distillate oil, and residual oil; the middle distillate oil is used as feedstock for needle coke production in a needle coke production unit; the residual oil and hydrogenated tail oil are mixed and fed into a low-sulfur petroleum coke production unit to produce low-sulfur petroleum coke. This invention also provides a combined production system for co-producing needle coke and low-sulfur petroleum coke. This effectively solves the problem of excessive hydrogen supply during needle coke production from the hydrogenated slurry, and the problem of short start-up cycles for delayed coking units due to the poor thermal stability of ethylene tar.

The utility model relates to the field of gas field production, in particular to a sulfur-containing natural gas sampling device which comprises a sampling bottle, the sampling bottle is provided with a piston, a sampling bottle valve and an atmosphere communication port, and the atmosphere communication port is provided with an atmosphere communication valve; the sampling joint is communicated with the sampling bottle valve, and a sampling joint valve is arranged between the sampling joint and the sampling bottle valve; the detection joint is communicated with the sampling bottle valve; a detection joint valve is arranged between the detection joint and the sampling bottle valve; the sulfur removal box is communicated with the sampling bottle valve, a sulfur removal box valve is arranged between the sulfur removal box and the sampling bottle valve, the sulfur removal box is provided with an exhaust port, and sulfur removal materials are contained in the sulfur removal box. The sulfur-containing natural gas in the sampling device is discharged into the atmosphere after being treated by the sulfur removal material in the sulfur removal box, so that the sulfur content in the natural gas is reduced, and the pollution to the atmospheric environment is reduced.

The invention relates to escherichia coli for reducing the sulfur content of coal, a coal desulfurization method and application thereof, and belongs to the technical field of coal resource utilization. The Escherichia coli capable of reducing the sulfur content of the coal, disclosed by the invention, is an Escherichia coli 2065801 strain; the coal desulfurization method comprises the following steps: mixing coal and sulfuric acid, filtering, cleaning, precipitating and drying to obtain pretreated coal; and carrying out mixed culture on the pretreated coal and the escherichia coli liquid, filtering, drying and precipitating to obtain the desulfurized coal. The Escherichia coli 2065801 strain and the coal desulfurization method have the advantages that the operation is simple, the cost is low, the desulfurization energy consumption is low, the desulfurization efficiency is high, the method is green and environment-friendly, and secondary pollution cannot be caused.