75results about "Sulfur compounds" patented technology

The utility model belongs to the field of sulfur melting kettle, specifically is a kind of sulfur foam sulfur melting kettle for blast furnace gas sulfur production, including kettle body, the top of kettle body is connected with kettle cover by bolt fixedly, the top of kettle cover is fixedly installed with connecting pipe;The utility model provides a kind of sulfur foam sulfur melting kettle for blast furnace gas sulfur production, by the setting of kettle body, kettle cover, connecting pipe, electric heat tracing band, heat-insulating cotton, second drive motor, second rotary rod, spiral blade and feed pipe, sulfur foam can be added to connecting pipe inside by feed pipe, sulfur foam added to connecting pipe inside can use electric heat tracing band to carry out preliminary heating, simultaneously, the output end of second drive motor can drive the rotation of the spiral blade fixedly installed on the surface of second rotary rod, the spiral blade of rotation can slowly drive the descending of heated sulfur foam, so as to make sulfur foam preliminary preheating, convenient for sulfur particle aggregation and settlement, simultaneously, after preheating, solubility of sulfide increases, and corrosion risk reduces.

The application belongs to the technical field of solid waste resource utilization, and specifically discloses a method and device for preparing silicon-calcium aggregate, sulfuric acid and CO2 by phosphogypsum oxygen-rich high-temperature decomposition. The method uses the adsorption method to obtain pure nitrogen products and oxygen-rich combustion-supporting gas, and provides different reaction temperatures and reaction atmospheres for different reaction stages of the rotary kiln reactor through the multi-point combustion mode, thereby ensuring the controllable high-temperature environment and atmosphere in the kiln. The method improves the combustion efficiency, greatly reduces the amount of flue gas after decomposition, effectively improves the concentration of SO2 in the flue gas and the efficiency of the subsequent sulfuric acid preparation system, and realizes CO2 emission reduction and resource utilization by using the CO2-rich tail gas of the sulfuric acid preparation system for adsorption recovery. The application also provides a device for realizing the method, which combines gas adsorption, oxygen-rich combustion and rotary kiln multi-point combustion equipment, thereby ensuring the effective realization of the process.

This invention discloses a low-temperature melting and filtering device for waste sulfur and its operating method. The device includes a crushing device, a screening device, a conveying device, and a sulfur melting kettle connected in sequence. The sulfur melting kettle is equipped with a heating device and a cooling device. The kettle lid is equipped with a feed valve, a nitrogen filling valve, a tail gas valve, a pressure gauge, a level gauge, a first thermometer, and a pressure relief valve. The nitrogen filling valve is connected to a nitrogen source through a gas pipe. The tail gas valve is connected to an absorption tower through a pipeline, and a first exhaust pump is installed on the pipeline. The bottom of the kettle has a discharge hole. The pressure relief valve is connected to a waste liquid collection tank externally through an overflow pipe. The top of the conveying device is connected to a feed auger, the top of the feed valve is connected to a temporary storage cylinder, and the top of the temporary storage cylinder is connected to the feed auger. The bottom of the kettle has a hinged discharge gate that can seal the discharge hole. The discharge gate has a liquid extraction hole, the top of which has a filter screen, and the bottom of which is connected to a discharge valve. The device and method of this invention have the characteristics of high thermal efficiency and sufficient safety redundancy.

The present invention relates to a positive electrode active material for a lithium-sulfur battery and a manufacturing method therefor, the positive electrode active material for a lithium-sulfur battery comprising a composite of a sulfur-based substance, a metal halide salt, and a carbon-based material doped with a transition metal.

The present application relates to a kind of dry method for viscose fiber factory waste gas recovery, including the following sequentially performed steps: (1) waste gas incineration;(2) purification;(3) deacidification mist;(4) drying;(5) sulfur combustion;(6) high temperature furnace gas B is imported into the acid making device to obtain finished product concentrated sulfuric acid.The present application overcomes the shortcomings of existing viscose factory waste gas acid making process equipment, such as easy to be corroded, frequent shutdown, difficult to maintain, low acid production, easy to escape sulfur waste gas, easy to mix furnace gas and external air, low economic benefit, complex process, and many by-products, etc.By adding liquid sulfur mixed combustion, controlling the temperature of each step, setting a booster fan in the front section of the drying tower, a main fan in the rear section, and reasonably arranging the inlet positions of furnace gas and external air, the present application has the advantages of simple process, large-scale acid production, no sulfur waste gas escaping, more environmentally friendly, no mixing of furnace gas and external air, high economic benefit, few by-products, and low maintenance cost.

The application provides a high-activity and anti-fluctuation vanadium / cerium / molybdenum-titanium catalyst, which comprises the following components in the total mass of the catalyst being 100%: active component 1: V2O5, content being 5.0 wt%-10.0 wt%; active component 2: CeO2, content being 3.0 wt%-8.0 wt%; active component 3: MoO3, content being 2.0 wt%-7.0 wt%; carrier: TiO2, content being the balance; the SO2 catalytic oxidation catalyst with CeO2, V2O5 and MoO3 as the active components and anatase TiO2 as the carrier realizes multiple synergistic effects of high specific surface area-multiple valence state oxide coupling-oxygen migration channel enhancement at the structural level, and has comprehensive advantages in low-temperature activity, anti-poisoning, redox cycle stability and carrier-active component interaction and the like. The system can maintain high SO2 to SO3 conversion rate and stability under the working conditions of complex and severe fluctuation of waste acid cracking regeneration gas.

The utility model discloses a multi-element accurate proportioning low-temperature brimstone furnace control system, which mainly comprises a central controller, and a data acquisition unit, a fan driving unit, a molten sulfur control unit, a metering pump control unit, an atomization control unit, an ignition control unit, a hearth positive and negative pressure protection unit and a brimstone furnace high and low temperature protection unit which are connected with and controlled by the central controller. The sulfur combustion furnace system automatically and accurately distributes air and sulfur according to the squeezing amount or the flow, the stoving intensity and the like, and the problems that due to the fact that an existing sulfur combustion furnace system is inaccurate in air distribution and sulfur distribution, combustion is insufficient, sublimed sulfur is much, and technological indexes are unstable are solved.

The utility model belongs to inorganic chemical production technical field especially relates to a kind of production system of magnesium sulfate direct calcination preparation high-purity magnesium oxide, including raw material storage tank, feeding station and calcinator, it is characterized in that, anhydrous magnesium sulfate is loaded in raw material storage tank, raw material storage tank bottom is connected with feeding station by air conveying pipeline;The bottom magnesium oxide outlet of calcinator, the flue gas outlet of calcinator top is connected air preheater, the flue gas outlet of air preheater is connected acid absorption tower by waste heat boiler, the top of acid absorption tower is connected concentrated sulfuric acid tank, the bottom sulfuric acid pipe of acid absorption tower sends magnesium sulfate regeneration device, the flue gas outlet of acid absorption tower is connected ammonia water circulating liquid absorption tower;The bottom magnesium oxide outlet of calcinator is connected packaging production line.Compared with prior art, the utility model has the advantages that: main product purity is improved from 98% to 99.5% or more;100% of solid waste generation is reduced, flue gas after calcination carries out two-stage acid recovery, realizes by-product resource utilization.

The application discloses a two-stage lithium-aluminum silicate transformation roasting system and method, and overcomes the shortcomings of low heat resistance and high cost of a whole electromagnetic induction heating cylinder by adopting a lithium-aluminum silicate transformation roasting system of a first-stage electromagnetic induction heating plus a second-stage sulfur oxidation self-heating, and has the advantages of long service life and low investment cost. In addition, the lithium-aluminum silicate transformation roasting is carried out in a clean way of electricity plus sulfur reaction heat, and is environment-friendly and low-carbon. The application is suitable for regions rich in electricity but lacking in fuels such as coal and natural gas and weak in logistics foundation.

The disclosure relates to systems and methods to produce hydrogen (H2) gas from hydrogen sulfide (H2S). H2S is contacted with a catalyst to form H2 gas and sulfur adsorbed to the catalyst. The adsorbed sulfur is contacted with oxygen (O2) gas to convert the adsorbed sulfur to sulfur dioxide (SO2) and regenerate the catalyst.

This invention relates to the field of phosphogypsum resource utilization, specifically disclosing a method for preparing light calcium carbonate and co-producing sulfuric acid by decomposing phosphogypsum. The method includes the following steps: adding a deagglomerating agent to phosphogypsum, followed by flotation and water washing to obtain purified phosphogypsum; drying and heating the purified phosphogypsum in a preheating furnace; mixing the dried phosphogypsum with carbon sulfide and adding it to a first-stage airlift circulating reactor, while introducing sulfur gas; conveying the reacted material to a second-stage airlift circulating reactor, where the reaction yields calcium oxide and a mixture of sulfur dioxide and carbon dioxide; catalytically oxidizing and absorbing the carbon dioxide mixture to obtain sulfuric acid and carbon dioxide gas; dissolving calcium oxide in water and introducing carbon dioxide gas to obtain a calcium carbonate suspension; filtering and drying the calcium carbonate suspension to obtain light calcium carbonate. This invention solves the problems of low purity and high decomposition temperature of calcium oxide products in existing technologies, achieving closed-loop material circulation and full component utilization.

This application belongs to the field of flue gas sulfuric acid production, specifically providing a flue gas sulfuric acid production system. This system includes: a drying unit to remove moisture from smelting flue gas, yielding a first flue gas and a first sulfuric acid; a conversion unit connected to the drying unit, used to convert sulfur dioxide in the first flue gas into sulfur trioxide, yielding a second flue gas; an HRS (High-Concentration Steam Reduction) unit, including an absorption unit, a heat recovery unit, and a diluent; and an acid concentration balancing tank connected to the heat recovery unit via a first connecting pipeline, supplying the high-concentration sulfuric acid to the heat recovery unit when the acid concentration in the heat recovery unit is below 99%. This flue gas sulfuric acid production system can maintain the normal operation of the HRS unit under low gas volume and low gas concentration conditions, and produces relatively more low-pressure steam.

The present invention relates to an apparatus used in a heat treatment process for obtaining purified lithium sulfide powder and presents a method and system for automating the lithium sulfide heat treatment process, which requires a lot of cost and time, to reduce production costs and increase the yield.

This invention belongs to the field of industrial solid waste resource utilization and inorganic material preparation technology, specifically relating to a coupled method and system for preparing jade core stone from gypsum waste residue and producing sulfuric acid as a byproduct. The coupled method includes: drying the gypsum waste residue in a first drying device to obtain semi-dry gypsum waste residue, then drying the semi-dry gypsum waste residue in a second drying device to obtain anhydrous gypsum raw material; mixing and grinding the anhydrous gypsum with pre-set auxiliary materials, and then processing it through a melting furnace roasting device, a calendering device, and a segmented crystallization annealing device to prepare jade core stone products, wherein the waste heat from the melting furnace roasting device, the calendering device, and the segmented crystallization annealing device is all returned to the second drying device; during the calcination of the anhydrous gypsum mixed and ground with pre-set auxiliary materials in the melting furnace roasting device, the sulfur-containing flue gas generated during the calcination process is collected and sequentially treated through a waste heat recovery device, a purification drying device, and a two-transfer two-absorption device to obtain industrial-grade sulfuric acid.

A method for embedding sulfur into conductive carbon is provided. Elemental sulfur is dissolved in liquid ammonia to form a sulfur-ammonia solution. Conductive carbon is soaked in the sulfur-ammonia solution to embed the conductive carbon with the dissolved sulfur. The liquid ammonia in the sulfur-ammonia solution can be removed as gaseous ammonia to yield sulfur-embedded conductive carbon. The sulfur-embedded conductive carbon can be used to manufacture sulfur cathodes. Such sulfur cathodes and batteries incorporating such sulfur cathodes are provided.

The application provides a method for smelting flue gas acid purification coupling copper electrolysis recovery, comprising: after the smelting flue gas is cooled, electric dust collection is carried out, acid washing and electric demisting are carried out, and active carbon adsorption is carried out in an active carbon tank; the obtained flue gas is subjected to a desulfurization tower, is oxidized and absorbed by hydrogen peroxide to obtain dilute acid, and other gases are discharged at a high altitude after electric demisting; the obtained dilute acid is transferred to a fluorine removal tank, rare earth additives are added for fluorine removal; after the dilute acid after fluorine removal is purified by a membrane processor, the dilute acid is added to a copper electrolysis system. The method connects the flue gas treatment and the copper electrolysis refining two links, realizes the cross-link circulation and reuse of sulfuric acid and chloride ions, reduces the consumption of purchased sulfuric acid and chloride ion adjusting reagents of the copper electrolysis system, reduces the production cost from the whole process, forms a desulfurization-acid production-reuse resource closed loop, and has remarkable economic, environmental protection and industrial popularization values.

Embodiments herein disclose a high-performance Vanadia-based catalyst designed for the efficient oxidation of sulfur dioxide (SO₂) to sulfur trioxide (SO₃) at significantly lower operating temperatures, with optimal performance around 400°C, a temperature lower than traditionally required by conventional catalysts. The catalyst consists of vanadium pentoxide (V₂O₅) as the active component, supported on naturally occurring uncalcined diatomaceous earth, combined with alkali metal promoters. A unique feature of the support material is the use of a mixture of relatively soft diatomaceous earth, exhibiting a percentage reduction of at least 35% in D50 particle size when measured by dry versus wet methods, alongside relatively hard diatomaceous earth to enhance mechanical strength. The catalyst demonstrates SO₂ conversion rates of 50-57% at 400°C and reaches a maximum of 80% at 410°C, surpassing benchmark catalysts that require higher temperatures (around 420°C) for similar conversions.

The application relates to the technical field of industrial waste acid treatment, and particularly discloses an intelligent cracking reactor for alkylated waste sulfuric acid and a safety control system thereof, which comprises a composite hearth, a combustion zone, a cracking zone, a turbulent reaction zone and a quenching outlet zone in sequence along a material flow direction; an intelligent atomization unit is in communication with the cracking zone and used for spraying the atomized alkylated waste sulfuric acid into the cracking zone; an intelligent safety control unit is in signal connection with the composite hearth and the intelligent atomization unit; wherein the cracking zone is of a conical contraction structure, a gradient composite lining is arranged on the inner wall of the cracking zone, the gradient composite lining comprises a corrosion-resistant layer, a heat-conducting layer and a heat-insulating layer from inside to outside, and a guide plate is arranged in the turbulent reaction zone. The application can guarantee the uniformity and stability of liquid drop particle sizes, thereby improving the cracking reaction efficiency and reducing the risk of organic carbonization and coking.

The utility model provides a kind of recovery treatment device of distillation residue in by-product sulphur comprehensive utilization process, belong to sulphur recovery processing technical field, including the cooling kettle for containing cooling water, the upper portion of cooling kettle is equipped with feed pipe, residue enters cooling kettle by feed pipe, and mixed with cooling water in cooling kettle to cool solidification, and solidified residue can be discharged by the discharge pipe of cooling kettle bottom;The utility model can be mixed by residue and water, to realize the rapid cooling of residue, to improve residue solidification quality and cooling efficiency.

This invention belongs to the field of fluorescence analysis technology and relates to the application of a sulfur quantum dot fluorescent probe in tryptophan detection. This invention utilizes sulfur quantum dot probes to explore exogenous tryptophan cell imaging technology, studies the role of ultraviolet light in cell imaging, and enhances the fluorescence signal intensity of the sulfur quantum dot fluorescent probe by ultraviolet light irradiation, effectively achieving in vitro quantitative detection of tryptophan and highly sensitive, highly selective in situ detection in living cells. This invention can be used for the detection of tryptophan in vitro and in living cells, and has promising clinical application prospects in the biomedical field.

This application relates to the technical field of chemical catalytic reaction engineering, and specifically discloses a fixed-bed conversion system for the catalytic oxidation of sulfur dioxide, including a reactor shell with multiple catalytic beds inside. An isothermal module is provided in the high-exothermic bed section, which is composed of multiple isothermal liners and a main catalyst layer stacked alternately. The isothermal liners and the main catalyst layer are arranged at intervals along the axial direction of the catalytic bed. In the main catalyst layer, main catalyst particles and inert thermally conductive particles are uniformly co-filled, enhancing the thermal conductivity inside the bed. The system also includes a coupling module, including a catalyst booster layer and a micro-liquid phase absorption unit. A modular cylindrical filling unit includes multiple detachable filling boxes with vents. The control unit includes temperature sensors and a control system arranged within the bed, enabling real-time monitoring and intelligent adjustment of the temperature distribution. This application achieves the effect of uniform temperature distribution within the fixed bed.

This invention provides a sulfur recovery process, a sulfur production device, and a desulfurization device. The sulfur recovery process includes: sulfur production from acidic gas via high-temperature thermal reaction and single-stage Claus sulfur production to obtain sulfur production tail gas; the sulfur production tail gas undergoes a first reaction with a second oxygen-containing gas in an incinerator, oxidizing all sulfur-containing components in the tail gas to sulfur dioxide, obtaining primary process gas; the primary process gas enters a reactor and undergoes a second reaction with a desulfurizing agent, adsorbing the sulfur dioxide in the primary process gas and converting it into sulfate, obtaining secondary process gas and a desulfurizing agent to be regenerated; at least a portion of the desulfurizing agent to be regenerated enters a regenerator to obtain regenerated desulfurizing agent; the regenerated desulfurizing agent is returned to the reactor to participate in the second reaction; the secondary process gas is treated by heat exchange and washing to obtain purified tail gas. This invention has advantages such as a short process flow, low energy consumption, simple operation, low investment, small footprint, high sulfur recovery rate, and near-zero sulfur dioxide emissions from the purified tail gas.

The present invention relates to a solid bio-pesticidal composition comprising of elemental Sulphur in the range of 60% w / w to 99% w / w, Azadirachtin in the range of 0.01% w / w to 20% w / w and at least one agrochemically acceptable excipient wherein particles of the composition is in the range of 0.1 micron to 60 microns, wherein the composition is in the form of water dispersible granules, broadcast granules, extruded granules, spheronised granules and powders. The invention relates to a process of preparing and also to a method for treatment of plant, crop, locus or soil against pests or diseases or managing pesticidal resistance or reducing pesticidal residue by application of a solid bio pesticidal composition. The invention also relates to a method for controlling pests and diseases by applying a solid bio pesticidal composition by foliar means at a dosage of 0.5 kg / ha to 30 kg / ha to a plant or a crop or parts thereof.

The application provides a flue gas mixing device, a flue pipe is inserted into a barrel cavity of a barrel, a pipe end of the flue pipe is close to a barrel bottom of the barrel, an air inlet is formed on a barrel wall of the barrel, an annular sealing plate is arranged at a barrel opening of the barrel, an inner ring of the annular sealing plate is in sealing cooperation with an outer peripheral wall of an inner pipe, an annular cavity is formed between the flue pipe and the barrel, and the flue pipe is provided with distributed air holes and air pipes which are in communication with the inside and outside of the flue pipe, and the air holes and the air pipes are staggered. The flue gas entering the flue pipe is increased, and the position of the flue gas entering the flue pipe is dispersed, so that the energy consumption of flue gas mixing is reduced.

The application relates to the technical field of catalytic reaction, and particularly discloses a fixed-bed catalytic conversion system which comprises a filter upper cover layer, a catalyst bed layer and a heat exchange structure. The filter upper cover layer is used for uniform flow, impurity trapping and dust filtering of raw material gas; the catalyst bed layer comprises a plurality of bed layers arranged along the gas flow direction, wherein the average particle size of the catalyst gradually decreases along the reaction gas flow direction, and the molar fraction of cesium contained in the catalyst in the total amount of alkali metal additives gradually increases along the reaction gas flow direction; the heat exchange structure is arranged between adjacent catalyst bed layers, and the temperature difference of the same section is controlled to be between 0-15 DEG C. The catalyst takes SiO2 as a carrier, V2O5 as an active component, and contains at least one of K, Na and Cs as an alkali metal additive. The system effectively improves the catalytic conversion efficiency and temperature control precision through the design of the gradient-distributed catalyst bed layer.

The application relates to the technical field of flue gas purification, and discloses an SCR denitration conversion integrated device and a smelting flue gas acid-making system. The SCR denitration conversion integrated device comprises an SCR denitration assembly which is used for removing nitrogen oxides in nitrous flue gas under the condition of 400 DEG C-450 DEG C to obtain first flue gas; and a conversion assembly which is connected with the SCR denitration device and is used for converting sulfur dioxide in the first flue gas into sulfur trioxide to obtain second flue gas. The SCR denitration conversion integrated device is simple in structure and greatly reduces the energy consumption of nitrous flue gas treatment.