35 results about "Sulfur product" patented technology

The invention discloses a catalytic electrode which comprises a substrate, and an anti-corrosion layer and a sulfur-phobic layer which are sequentially attached to the substrate, the substrate is a blank foamed nickel substrate, the anti-corrosion layer is formed by dipping the foamed nickel substrate with a ferric salt solution, and the sulfur-phobic layer is formed by processing a precursor with a cobalt salt solution through electro-deposition. Accordingly, a corresponding preparation method is also established, a blank foamed nickel substrate is adopted, firstly, the foamed nickel substrate is subjected to dipping treatment with an iron salt solution to obtain a precursor with an anti-corrosion layer, and then the precursor is subjected to electro-deposition treatment with a cobalt salt solution to form the sulfur-phobic layer on the anti-corrosion layer. Wherein the anti-corrosion layer can isolate a high-sulfur environment and prevent the substrate from being corroded; the sulfur phobic layer may prevent sulfur products from depositing and passivating the electrode. The catalytic electrode provided by the invention solves the problems of sulfur reaction corrosion and passivation, shows excellent catalytic activity and stability, and can be used for catalyzing sulfur oxidation reaction for a long time. In conclusion, the method has the advantages of mild conditions, simple process, economy and practicability, and has obvious large-scale industrial production potential.

The invention relates to the technical field of nano material preparation and application, in particular to a transition metal selenide catalyst and a preparation method and application thereof.The preparation method comprises the steps that firstly, metal nickel salt, ferric salt, urea and ammonium fluoride are dissolved in deionized water, and a nickel-iron layered hydroxide nanosheet precursor is synthesized through a hydrothermal method; secondly, preparing an iron-doped nickel selenide catalyst by adopting a selenylation reaction; the electronic structure of nickel selenide is regulated and controlled by utilizing an iron doping strategy, and the catalytic performance is improved. The prepared iron-doped nickel selenide catalyst has good catalytic activity when being used for hydrogen evolution reaction and sulfur ion oxidation reaction. In a two-electrode sulfur ion oxidation coupling hydrogen production electrolytic tank, the current density of 10mAcm <-2 > can be output only by the voltage of 0.439 V, and the targets of efficient and energy-saving hydrogen production and sulfur ion oxidation upgrading into a high-added-value elemental sulfur product are achieved. The method has the advantages of simple and controllable preparation process, low raw material price, easiness in batch production and the like, and can be used as a catalyst for efficient water electrolysis hydrogen production and sulfur ion oxidation reaction.

The utility model discloses a sulfur powder collecting device with a cleaning function, and relates to the technical field of sulfur product processing, the sulfur powder collecting device with the cleaning function comprises a support frame, a separator main body and a collecting assembly; the separator main body is mounted on the support frame; the collecting assembly is communicated with an inlet of the separator main body; wherein a liquid cooling device is arranged on the outer surface of the separator main body, a cleaning device is arranged in the separator main body, and a collecting hopper is arranged at the lower end of the separator main body; according to the technical key points, the liquid cooling device and the cleaning device are installed on the separator body, the liquid cooling device can achieve cooling of sulfur powder in the machining process and reduce the risk, the liquid cooling device is matched with the cleaning device, the sulfur powder attached to the inner wall of the separator body can be flushed down, leakage of the sulfur powder is avoided, and therefore the content of the sulfur powder in air is effectively reduced; the safety is higher, the using effect is good, and the good using prospect is achieved.

This invention discloses a transition metal phosphide catalyst, its preparation method, and its application, belonging to the field of electrocatalysis technology. The process includes: firstly, dissolving nickel salt, lanthanum salt, urea, and ammonium fluoride in deionized water to synthesize a nickel-lanthanum layered hydroxide nanosheet precursor via a hydrothermal method; secondly, preparing a lanthanum-doped nickel phosphide catalyst using a phosphating reaction; and thirdly, utilizing a lanthanum doping strategy to modulate the electronic structure of nickel phosphide and improve its electrocatalytic reaction performance. This lanthanum-doped nickel phosphide material exhibits good catalytic activity when used to catalyze hydrogen evolution and sulfide ion oxidation reactions. In an integrated two-electrode electrolyzer for sulfide ion oxidation-assisted hydrogen production, it outputs 10 mA cm⁻¹. ‑2 This invention achieves the goal of producing hydrogen and high-value-added sulfur products with low energy consumption by requiring a relatively low voltage of 0.525 V at a current density. It has advantages such as simple preparation process, controllable operating conditions, and low raw material costs, possessing the potential for large-scale production and serving as a high-performance catalyst for electrocatalytic hydrogen production and sulfur ion oxidation reactions.

A smelting method of ultra-low nitrogen steel comprises the following steps: (1) pretreatment of molten iron: carrying out deep desulfurization on the molten iron by adopting a KR method until S is less than or equal to 0.0020 wt% and S in a steel ladle after tapping is less than or equal to 0.0012 wt%; (2) converter smelting, wherein Ar gas bottom blowing stirring is adopted in the whole process; (3) LF refining is conducted, the bottom blowing gas flow at the initial stage of refining is smaller than or equal to 3.0 Nl / (min.t steel), and the electrode electrifying power is smaller than or equal to 70 kW / t steel; the bottom blowing gas flow is smaller than or equal to 7.0 Nl / (min.t steel) in the later stage of electrification, and the electrification power is smaller than or equal to 130 kW / t steel; 4-10 kg of active lime is added to each ton of steel, and the content of CaO in ladle top slag is controlled to be 50-55 wt% after LF refining is finished; and (4) RH refining: starting a vacuum pump of an RH refining furnace for exhausting, before the pressure in a vacuum chamber is reduced to 1kPa, controlling the flow of circulating gas to be 6-8N1 / (min.t steel), reducing the pressure in the vacuum chamber to be less than or equal to 1kPa, and increasing the flow of the circulating gas to be 10-12N1 / (min.t steel). According to the method, on the premise that the sulfur content of the molten steel is smaller than 20 ppm and the smelting cost is not increased, the ultralow-nitrogen and ultralow-sulfur product with the nitrogen content smaller than 30 ppm can be obtained.

This invention discloses a compound additive and its application in removing corrosive sulfur from mineral insulating oil, relating to the field of insulating oil additives. It includes a first inhibitor, a second inhibitor, a first antioxidant, and a second antioxidant. The first inhibitor is a benzotriazole derivative, and the second inhibitor is a thiadiazole derivative and / or methylbenzotriazole. The first antioxidant is pyrogallol, and the second antioxidant is butylated hydroxytoluene and / or tert-butylhydroquinone. This additive uses a compound inhibitor and a compound antioxidant. When applied to mineral insulating oil, the synergistic effect of the compound inhibitor improves the insulating oil's resistance to corrosive sulfur. Simultaneously, the compound antioxidant and compound inhibitor are balanced to maximize the insulating oil's oxidation resistance, providing continuous and efficient protection for mineral insulating oil in actual operation, resulting in excellent physical and electrical properties.

The present invention discloses a high-temperature electrochemical method and device for fully decomposing hydrogen sulfide to produce hydrogen and sulfur. The method includes the following steps: a gas containing hydrogen sulfide undergoes an electrochemical oxidation reaction at the anode of an electrolytic cell to produce sulfur and protons; the sulfur flows out of the anode chamber of the electrolytic cell in a gaseous state under high temperature conditions and is collected; the protons pass through the solid electrolyte membrane of the electrolytic cell to reach the cathode, and are reduced at the cathode of the electrolytic cell to produce hydrogen; the solid electrolyte membrane is a high-temperature proton conductor, allowing protons to pass from the anode to the cathode under high temperature conditions. The present invention converts hydrogen sulfide into high-value-added products through electrochemical means, achieving the treatment and resource utilization of toxic gases. Compared with traditional electrochemical methods, water is not required as an absorption medium for hydrogen sulfide, the hydrogen sulfide decomposition efficiency is high, and the resulting sulfur product has high purity.

The invention provides a grading and classifying comprehensive utilization method for copper ore waste rocks, which comprises the following steps: crushing and screening the waste rocks to obtain a product with the particle size of-120 + 30mm, a product with the particle size of-30 + 10mm and a product with the particle size of-10mm; the-120 + 30 mm fraction product is subjected to X-ray sorting, and a sorted copper-rich high-sulfur product and a-120 + 30 mm low-sulfur product are obtained; carrying out jigging reselection on the-30 + 10 mm fraction product to obtain a reselected copper-rich high-sulfur product and a-30 + 10 mm low-sulfur product; and jigging and reselecting the product with the particle size of-10mm to obtain a reselected copper-rich high-sulfur product and a low-sulfur product with the particle size of-10mm. The method comprises the steps of waste rock classification, X-ray large block separation and medium and fine particle gravity separation for copper collection, copper-rich high-sulfur products separated from raw materials of different particle fractions are combined as recovered copper ore, and the recovered copper ore is returned to a separation plant for processing; the two-stage process is utilized, the number of equipment is small, the treatment capacity is large, the flow structure is simple, the operation cost is low, and production management is convenient.

The invention discloses a high-efficiency resource recycling process for sulfur-containing components in blast furnace slag, and belongs to the technical field of clean reutilization in the iron and steel industry. The resource recycling method for the sulfur-containing component of the blast furnace slag comprises the following steps: mixing the blast furnace slag with a hydrochloric acid solution, and leaching to obtain sulfur-containing waste gas; mixing a sulfur dioxide-containing gas component with the sulfur-containing waste gas, reacting to obtain sulfur steam, and condensing to obtain a sulfur product. According to the method, rich sulfur substances in the blast furnace slag are utilized, waste gas containing H2S is fully generated in the acid leaching process, then the waste gas is collected, a reasonable recycling process is designed, and efficient conversion and utilization of the sulfur element are achieved; the process is reasonable in overall design, high in operability, safe and stable in system, economical and feasible, and capable of realizing removal and recovery of sulfur elements contained in the blast furnace slag.

The invention provides a copper recovery and sulfur reduction graded utilization process for copper ore waste rocks, which comprises the following steps of: crushing and screening the waste rocks to obtain oversize products and undersize products; performing X-ray sorting on the oversize product to obtain a sorted copper-rich high-sulfur product and a sorted low-sulfur product; finely crushing the separated low-sulfur product, combining with the screen underflow, and screening to obtain a coarse-fraction product, a medium-fraction product and a fine-fraction product; performing jigging reselection on the medium-grade product to obtain a reselected copper-rich high-sulfur product and a reselected low-sulfur product, and performing photoelectric color selection on the reselected low-sulfur product to obtain low-sulfur aggregate and secondary aggregate; and after the fine fraction products are screened, oversize materials and undersize materials are obtained, the undersize materials are subjected to jigging reselection, and reselected copper-rich high-sulfur products and reselected tailings are obtained. The grade of the recovered copper ore meets the requirement for the selected grade of a selection plant, the copper recovery rate is high, and the sulfur content of the waste ore is reduced to the maximum extent; the combined process flow is simple, the system treatment capacity is high, and large-scale implementation is facilitated.

This invention proposes a sulfur purification method combining continuous flow solid-liquid separation and low-temperature sublimation, comprising: S1, physically crushing sulfur raw materials into sulfur particles, placing the sulfur particles in a cleaning solution for ultrasonic cleaning to obtain cleaned sulfur particles; wherein, the cleaning solution is an aqueous solution including at least one cleaning agent selected from sodium carbonate, EDTA, citric acid, phosphate, and silicate; S2, continuously countercurrently immersing the cleaned sulfur particles with an immersion solution, followed by solid-liquid separation to obtain solid sulfur after solid-liquid separation; S3, sublimating the solid sulfur after solid-liquid separation into sulfur vapor at a temperature of 80–110°C and a vacuum of 0.01–10 Pa; S4, condensing the sulfur vapor to obtain solid sulfur. This sulfur purification method effectively reduces energy consumption during the purification process, reduces environmental pollution, and significantly improves the purity of sulfur products, greatly enhancing the energy utilization rate and environmental performance of the entire production process.

The invention discloses a method and system for producing metal and sulfur products through plasma cracking of sulfide ore in the field of sulfide ore clean smelting, and the method comprises the following steps: step S10, raw material pretreatment: the sulfide ore containing lead, zinc, copper and other nonferrous metals is dried and ground to obtain dry fine ore powder with the water content of 1% or below and the particle size of-200 to-50 meshes; s20, plasma gun preparation, wherein cooling circulating water is fed into a plasma gun; and step S30, plasma generation: ionized base gas N2 is sent into a cavity of a plasma gun through another pipeline, and after the plasma gun is powered on, N2 is subjected to arcing ionization between the cathode and the anode to form plasma with the temperature of 1500 DEG C or above. The method provided by the invention is rapid and thorough in sulfide cracking, shortens the smelting process, improves the production efficiency, avoids the generation of a large amount of SO2-containing pollution gas, reduces the pollution to the environment, realizes high-value utilization of sulfur, simplifies the process flow, and reduces the equipment investment and operation cost of enterprises.

The invention discloses an oil and gas field sewage desulfurization method, and relates to the field of oil and gas field sulfur-containing sewage treatment. Comprising the following steps: adjusting the pH value of the sulfur-containing sewage to 8.0-9.0, and adding a sulfur particle regulating agent; adding a composite complex iron catalyst into the treated sewage, and carrying out catalytic oxidation reaction under the condition that the concentration of dissolved oxygen is controlled to be 2-8mg / L; adding an air flotation separating agent to separate the generated sulfur particles from the water phase to obtain sulfur-enriched foam and desulfurization sewage; a redox regulator is added into the separated desulfurization sewage, and the activity of the catalyst is recovered by controlling the redox potential within the range of 150-250 mV; and a flocculating agent and a pH regulator are added, so that the treated water quality reaches the discharge standard. According to the method, sulfide in the high-concentration sulfur-containing sewage can be stably reduced to 0.5 mg / L or below, the desulfurization efficiency far exceeds 99.9%, the purity of a sulfur product is larger than or equal to 99.5%, the treatment effect is stable and reliable, and the sulfur recovery rate is larger than or equal to 93.2%.

The invention belongs to the field of daily chemicals, and discloses a preparation method of colloidal sulfur, which specifically comprises the following steps: mixing sulfur-containing dispersoid with Arabic gum and water-soluble oat flour, grinding to obtain a ground product, and freeze-drying or drying the ground product under reduced pressure. According to the method, Arabic gum and water-soluble oat powder are adopted as composite coating materials for coating, a colloidal sulfur product with the D50 particle size of 4.5-10 microns can be obtained through grinding and a drying process, and compared with a traditional colloidal sulfur product, the colloidal sulfur product is better in coating stability, higher in coating rate, lower in irritation and capable of better achieving the effects of removing oil, controlling acnes, removing dandruff and controlling oil. Meanwhile, the invention also discloses application of the colloidal sulfur.

The invention discloses a compound additive and application thereof in removing corrosive sulfur products in mineral insulating oil, and relates to the field of insulating oil additives. Comprising a first inhibitor, a second inhibitor, a first antioxidant and a second antioxidant, the first inhibitor is a benzotriazole derivative, and the second inhibitor is a thiadiazole derivative and / or methyl benzotriazole; the first antioxidant is pyrogallic acid, and the second antioxidant is butylated hydroxytoluene and / or tert-butylhydroquinone. According to the additive, the compound inhibitor and the compound antioxidant are adopted, when the additive is applied to the field of mineral insulating oil, the corrosion and sulfur resistance of the insulating oil is improved through the synergistic interaction effect of the compound inhibitor, and meanwhile the oxidation resistance of the insulating oil is improved to the maximum extent through mutual balance of the compound antioxidant and the compound inhibitor; and continuous and efficient protection is provided for the mineral insulating oil in actual operation, so that the physical property and the electrical property of the mineral insulating oil are excellent.

The invention provides a combined membrane method resourceful treatment device and process for a desulfurization solution, and belongs to the technical field of industrial wastewater treatment. The device comprises a plate-and-frame filter press, a homogeneous membrane / reverse osmosis membrane, a nanofiltration membrane, an activated carbon decoloration tank, an evaporator, a first cooling pelleter, an ultrasonic-assisted ozone centrifugal reactor, a sulfur melting kettle, a second cooling pelleter, an ultrafiltration membrane and a bipolar membrane. By means of the synergistic effect of ultrasonic cavitation and ozone oxidation, thiosulfate is efficiently decomposed, elemental sulfur is directionally generated, and a high-quality sulfur product is obtained by matching with refining of the sulfur melting kettle; meanwhile, thiocyanate and sulfate / thiosulfate are accurately separated through a nanofiltration device, a high-purity thiocyanate product is produced through activated carbon decoloration and evaporation concentration, then bipolar membrane electrodialysis is used for directly converting sulfate into recyclable acid and alkali, various high-value resources are systematically recycled, and the method is suitable for industrial production. The problems of low resource recovery rate and insufficient product purity of the traditional process are solved.

The invention discloses a continuous production process of high-dispersity insoluble sulfur, and particularly relates to the technical field of chemical engineering. The process comprises the following steps: calcining pyrite under an oxygen-enriched condition to generate sulfur dioxide, and converting the sulfur dioxide into a sodium sulfite solution; adding excessive elemental sulfur into the solution to generate a polysulfide precipitate; collecting hydrogen sulfide gas and active sulfur while performing acidolysis precipitation; hydrogen sulfide and sulfur dioxide are mixed in proportion, and high-purity sulfur is regenerated through catalysis of gamma-aluminum oxide; mixing the regenerated sulfur with active sulfur, and carrying out high-temperature gasification polymerization at 700-750 DEG C under the protection of nitrogen; then the sulfur steam is in countercurrent contact with low-temperature water mist through a granulation tower and is rapidly cooled and solidified into fine particles; and finally performing vacuum drying to obtain a finished product. Through material circulation and process integration, sulfur source activation, long-chain polymer structure directional regulation and control and accurate control of particle morphology are realized. The obtained insoluble sulfur product has high insoluble content, fine and uniform particle size and excellent thermal stability.

The utility model discloses sulfur product transfer equipment, and relates to the technical field of sulfur product processing, the sulfur product transfer equipment is applied to transportation of sulfur particles in a production workshop, the sulfur product transfer equipment comprises a conveying track, a transfer trolley, a storage box body, a feeding assembly and a discharging pipe fitting, the conveying track is arranged on the ground of the production workshop; the transfer trolley is arranged on the conveying track and runs along the conveying track; the storage box body is fixedly mounted on the transfer trolley; the feeding assembly used for being connected with a discharging pipe of sulfur particle processing equipment is installed at the position, close to one side, of the upper end face of the storage box. The discharging pipe fitting is installed on the side end face, away from the feeding assembly, of the storage box. According to the technical key points, safe storage and conveying of sulfur particles can be achieved, the safety of sulfur product processing is guaranteed, pipeline connection is convenient during feeding and discharging, and the sulfur particle conveying device can be suitable for processing equipment with different heights and different inclination angles, is high in applicability and good in using effect and has a good using prospect.

This invention discloses a method for recovering high-purity sulfur from hydrometallurgical zinc slag. The method involves washing, drying, grinding, and sieving the hydrometallurgical zinc slag, then mixing it with a water-ethylene glycol solvent and adjusting the pH to the range of 2-10. The mixture is then transferred to a high-pressure reactor for a solvothermal reaction under mechanical stirring. After the reaction is complete, the mixture is cooled to room temperature, and the solid product is separated by water washing to obtain sulfur-rich slag and metal-enriched residue. The sulfur-rich slag is then physically cut to remove surface impurities, yielding the high-purity sulfur product. This method combines high-pressure solvothermal reaction with physical cutting to separate sulfur from metallic impurities in hydrometallurgical zinc slag, obtaining a high-purity sulfur product. This reduces the accumulation of sulfur-containing waste and the loss of sulfur resources. Furthermore, this method is simple, economical, and efficient, providing a new approach for the treatment of sulfur-containing waste.

The invention discloses a pyrite sulfur product recovery device, and relates to the technical field of pyrite recovery devices, the pyrite sulfur product recovery device comprises a bottom plate, the top of the bottom plate is provided with a grinding assembly used for grinding a pyrite sulfur product into powder, and one side of the grinding assembly is fixedly communicated with a crushing assembly used for crushing pyrite sulfur product particles. According to the pyrite sulfur product recovery device, the grinding assembly is arranged, the motor drives the worm to rotate through the output shaft, the worm is in meshing transmission with the turbine, the second rotating shaft is directly driven to rotate, power of the grinding assembly is synchronously transmitted to the crushing assembly, and when the second rotating shaft rotates, on one hand, the crushing assembly is driven to operate in order; two-stage crushing of the pyrite is completed; and on the other hand, a grinding roller and a grinding plate of the grinding assembly work synchronously, and the crushed pyrite particles can directly enter the grinding assembly to be ground through a communication channel between a crushing box and a cylindrical plate.

The utility model discloses a weighing device for sulfur product proportioning, and relates to the technical field of sulfur weighing, the weighing device comprises a weighing hopper, a fixing ring frame, a weighing device and a switching sealing plate, a lap joint ring is processed on the outer wall of the middle of the weighing hopper, a rotary actuator is connected to the center of the switching sealing plate in an assembled mode, a circular truncated cone sleeve is coaxially arranged at the bottom of the weighing hopper, and the circular truncated cone sleeve is connected with the rotary actuator in an assembled mode. A C-shaped groove is machined in the circular truncated cone sleeve, an erecting platform is assembled at the bottom of the fixing ring frame, and a plurality of guide vertical rods are integrally formed at the top of the fixing ring frame; according to the technical key points, a lap joint circular ring is machined on the outer wall of a weighing hopper, a plurality of weighing devices are arranged between a fixed ring frame assembled at the top of an erecting platform and the lap joint circular ring, sulfur fed into the weighing hopper can be weighed, and when a rotary actuator controls a switching sealing plate to rotate and the edge of the switching sealing plate is separated from the bottom of the weighing hopper, the weighing devices can be switched to the lap joint circular ring. Sulfur can be completely released to the bottom, and the situation that the sulfur remains in a connecting area of the weighing hopper and the switching sealing plate is avoided as much as possible.

The utility model discloses circulating heating equipment for sulfur product processing, which relates to the technical field of sulfur product processing and comprises a heater, a heating cylinder is placed in the heater, and the circulating heating equipment for sulfur product processing is provided with a stirring plate, a rotating pipe and a transmission rod. The output end of the servo motor drives a second transmission gear to rotate, so that the second transmission gear drives a stirring plate to rotate in the circumferential direction through a driving column, and meanwhile, the driving column rotates to drive a first transmission gear to move circumferentially along the interior of a gear ring, so that a transmission rod drives a worm gear through a worm part to drive a rotating pipe to rotate; when the driving column rotates, the driving column drives the scraping plate to move circumferentially along the inner cavity of the heating cylinder through the scraping column, so that sulfur particles on the inner wall of the heating cylinder are scraped off, and meanwhile, sulfur particles on the inner wall and the bottom of the heating cylinder can be scraped off; therefore, the sulfur particles in the inner cavity of the heating cylinder are uniformly heated.

The invention belongs to the field of petrochemical engineering, and particularly relates to a method for decomposing hydrogen sulfide through electro-catalysis. The method is characterized in that a reaction system of an organic ammonium salt electrolyte solution based on carbon disulfide is used for preparing the organic ammonium salt electrolyte solution based on carbon disulfide by blending a plurality of organic ammonium salts and an organic solvent in proportion, an electrocatalytic H2S decomposition process is formed by combining an electrochemical device, and foamed nickel is used as an electrode. The method is characterized in that H2S is subjected to electrocatalysis by adopting a one-pot method under the conditions of room temperature, normal pressure and constant voltage, H2S is decomposed into sulfur and H2, sulfur is recovered through rotary evaporation, and H2 and sulfur products are obtained at the same time. According to the process, sulfur and H2 can be obtained through efficient electro-catalysis of hydrogen sulfide under the mild conditions of room temperature, normal pressure and the like.

The invention provides a material suitable for hydrogen sulfide adsorption catalysis and a preparation method and application thereof. The preparation method sequentially comprises the steps of biomass-based porous carbon carrier preparation, copper-iron double-metal gradient doping, in-situ reduction, active site construction and powder forming. Firstly, a biomass raw material and a sodium alginate pore-forming agent are adopted to synergistically prepare hierarchical porous carbon, the specific surface area is large, the hierarchical pore structure can simultaneously meet the requirements for rapid diffusion of H2S and efficient storage of sulfur products, and the problem of sulfur blockage is solved. Secondly, through gradient doping, dispersing agent regulation and control and in-situ reduction processes, active sites are fully exposed, and the H2S penetration capacity is large; moreover, weak-medium alkaline sites are formed through adjustment of K2CO3, H2S dissociation is promoted, sulfate side reaction is inhibited, and the sulfur selectivity exceeds 95%.

The invention discloses a small-scale wellhead high-pressure natural gas direct selective oxidation desulfurization system and process, natural gas and pressurized air are mixed, heated and introduced into a desulfurization reactor A for reaction, H2S is catalytically oxidized into elemental sulfur steam, most of the sulfur steam is gradually condensed and adsorbed in internal pore channels of a catalyst, and the sulfur steam is gradually condensed and adsorbed in the internal pore channels of the catalyst; a small amount of sulfur steam enters the washing tank A along with natural gas to be purified and is cooled, purified gas is obtained, a small amount of gas in the purified gas serves as regenerated gas, is heated and then is introduced into the desulfurization reactor B for regeneration, the sulfur steam can be brought out of the desulfurization reactor B and then enters the sulfur condenser, and a sulfur product is formed in the liquid sulfur tank. Tail gas of the sulfur condenser is introduced into a washing tank B for purification and cooling to obtain fuel gas. According to the present invention, the device is simple, the cost is easily reduced, the H2S conversion approaching 100% and the selectivity not less than 99.3% can be achieved, the high hydrogen sulfide removal rate and the good gas purification performance are provided, and the purity of the obtained sulfur exceeds 99.5%.

The invention discloses a hydrogen sulfide selective catalytic oxidation reaction process and a multi-stage integrated system. Reaction gas containing certain H2S concentration is introduced into a multi-stage series reactor filled with a catalyst; according to the hydrogen sulfide selective catalytic oxidation reaction sequence, air is distributed to the first-stage reactor to the last-stage reactor in sequence, reaction gas containing 0.8%-1.3% of H2S in each stage of reactor is promoted to be subjected to selective catalytic oxidation reaction through a catalyst, elemental sulfur products are directionally generated, generated sulfur steam is condensed and separated, and the hydrogen sulfide is obtained. And obtaining liquid sulfur from a condensation reaction effluent of the sulfur steam until the introduced reaction gas is completely reacted. The invention has the beneficial effects that the process and the multistage integrated system are suitable for sulfur recovery of medium and low latent sulfur content, the system equipment is designed in a highly integrated manner, the pipeline arrangement and occupied area and space are reduced, the process is shortened, the process is simple, the occupied area is greatly reduced, the control parameters are reduced, and the operation efficiency of the equipment is improved; the sulfur yield is high, and the national emission standard of tail gas SO2 can be directly met.

The application discloses a method for filtering and separating sulfur in metal sulfur residue and preparing polymerized sulfur, and the method comprises the following steps: pretreating the metal sulfur residue by acid immersion, water washing, dehydration and melting to obtain molten metal sulfur residue; adding viscosity regulators (thiazole substances and guanidine substances) into the molten metal sulfur residue, stirring and reacting, and then performing pressure filtration separation to obtain sulfur liquid; adding polymerization regulators (thiazole substances, thiuram substances, sulfenamide substances and guanidine substances) into the sulfur liquid to perform polymerization, and then adding polymerized sulfur capping agents to perform capping to obtain polymerized sulfur liquid; and cooling the polymerized sulfur liquid in ice water to obtain polymerized sulfur products. The method can realize viscosity reduction of the molten metal sulfur residue by using special viscosity regulators, improve the separation rate of sulfur and metal impurities in the metal sulfur residue, obtain high-purity sulfur liquid, and control liquid sulfur polymerization by using polymerized sulfur regulators to obtain high-molecular-weight polymerized sulfur products with high yield.

The invention belongs to the field of comprehensive recycling of non-ferrous metal smelting waste residues, and relates to a preparation method of a sulfur dispersing agent and application of the sulfur dispersing agent to separation and recovery of sulfur from high-sulfur residues. Alkali lignin is subjected to hydroxymethylation, sulfonation and copolymerization and then is subjected to spray drying to prepare the sulfur dispersant. The dispersing agent can generate effective electrostatic repulsion and steric hindrance effects on different mineral particles, and has good dispersing performance. The method can be used for high-pressure decantation extraction of high-sulfur slag from different sources to obtain solid industrial sulfur with a sulfur product grade of grade B (sulfur purity gt; and the recovery rate of the sulfur is more than 95%. The prepared sulfur dispersing agent can be used for efficiently recovering sulfur from high-sulfur slag in the hydrometallurgy industry, the sulfur product reaches the B-grade sulfur standard in GB / T 2449-2021, and the sulfur dispersing agent has remarkable industrial application value.

The invention belongs to the field of petrochemical engineering, and particularly relates to a preparation method and application of an electrolyte for indirectly electro-catalyzing decomposition of hydrogen sulfide. The method is characterized in that a reaction system of an organic ammonium salt electrolyte solution based on carbon disulfide is used for preparing the organic ammonium salt electrolyte solution based on carbon disulfide by blending a plurality of organic ammonium salts and an organic solvent in proportion, an electrochemical device is combined to form an indirect electro-catalysis H2S decomposition process, and cobalt-doped cadmium sulfide (Co-CdSm) is used as a catalyst. The method is characterized in that H2S is subjected to electrocatalysis by adopting a one-pot method under the conditions of room temperature, normal pressure and constant voltage, H2S is decomposed into sulfur and H2, sulfur is recovered through rotary evaporation, and H2 and sulfur products are obtained at the same time. The process can be used for efficiently and indirectly electrocatalyzing hydrogen sulfide to obtain sulfur and H2 under the mild conditions of room temperature, normal pressure and the like.

The present invention relates to the technical field of liquid sulfur degassing, and discloses a device and method for catalytic liquid sulfur degassing, including a liquid sulfur tank for storing liquid sulfur and a catalytic degassing tower for degassing, a tank partition is provided in the liquid sulfur tank to separate the liquid sulfur tank into a buffer zone and a finished product zone, a tower partition is provided in the catalytic degassing tower to separate the catalytic degassing tower into a catalytic chamber and a liquid sulfur chamber, and the top of the catalytic degassing tower is connected to an exhaust structure; the buffer zone is connected to the catalytic chamber through a feeding pipeline, an overflow pipe is provided in the liquid sulfur chamber and is connected to reflux to the finished product zone; the inlet of the overflow pipe is lower than the outlet, and the pipe body includes a pipe section higher than the outlet. The present invention effectively promotes catalytic degassing by separating the structures of the liquid sulfur tank and the catalytic degassing tower, and setting the overflow pipe to a structure with a low inlet and a high outlet, and avoids the catalyst powder from flowing back into the liquid sulfur tank along the overflow pipe. Such a design improves the efficiency of degassing and also improves the quality of the liquid sulfur product after degassing.