493 results about "Sulfur containing" patented technology

The invention belongs to the technical field of activated carbon preparation, and relates to sulfur-doped activated carbon and a preparation method thereof. The method comprises the following steps: firstly, adding a cleaned and crushed biomass raw material into an aqueous solution of a sulfur-containing dopant, carrying out dipping treatment, separating, drying, and carrying out high-temperature carbonization in an oxygen-free environment to obtain a sulfur-doped carbonized material; and crushing the sulfur-doped carbonized material into particles, and activating at high temperature in a carbon dioxide atmosphere to obtain the sulfur-doped activated carbon particles. The sulfur-doped active carbon particles prepared by utilizing a sulfur in-situ doping and physical activation combined method are stable in structure, the active carbon with rich mesopore and micropore structures can be obtained by doping a small amount of sulfur, the surface hydrophobicity of the active carbon is improved, meanwhile, the adsorption sites on the surface are increased, and the adsorption performance on hydrophobic organic pollutants is remarkably improved. The method is simple in process, low in cost, environment-friendly and easy for commercialized application.

The invention discloses a gas-sensitive material based on double noble metal doped holmium iron oxide and application of the gas-sensitive material to detection of hydrogen sulfide in a sulfur-containing ore body exploration environment, and relates to the technical field of gas-sensitive materials. HoFeO3 is used as a substrate material, and two elements of Au and Pt are used for doping modification of the HoFeO3 to prepare the gas sensitive material based on double noble metal doped holmium iron oxide. Au and Pt are combined to perform doping modification on HoFeO3, a synergistic effect is achieved on improving the temperature stability of the gas-sensitive material, the sensitivity of the gas-sensitive material in a high-humidity environment can be improved, in addition, due to the synergistic catalysis effect of Au and Pt, an energy barrier of H2S adsorption reaction can be remarkably reduced, surface electron transfer and reaction activity are promoted, and the sensitivity of the gas-sensitive material in a high-humidity environment is improved. Therefore, the working temperature is reduced, the response value is improved, and the method is suitable for detecting hydrogen sulfide gas in a sulfur ore body exploration environment.

The invention relates to a method for preparing sponge iron from laterite-nickel ore hydrometallurgy tailings, which comprises the following steps: (1) carrying out acid leaching on laterite-nickel ore hydrometallurgy tailings to obtain leached residues without at least part of CaSO4; (2) oxidizing and roasting the leaching residues obtained in the step (1), so that at least part of sulfate is discharged as sulfur-containing gas; performing hydrogen reduction to obtain a reduced material; and (3) the reduction material in the step (2) is sequentially subjected to ore grinding and magnetic separation, and the sponge iron with the Fe content being 90 wt% or above and the S content being 0.01 wt% or below is obtained. According to the method, iron resources in the laterite-nickel ore hydrometallurgy tailings are recycled, desulfurization and reduction are carried out step by step, the desulfurization efficiency is improved, the reduction temperature is reduced, and the sponge iron with the Fe content being 90 wt% or above and the S content being 0.01 wt% or below is obtained.

The invention relates to a surfactant oil displacement composition suitable for a high-temperature and high-salt oil reservoir and application of the surfactant oil displacement composition. The surfactant oil displacement composition comprises the following components in percentage by mass: 0.10-0.50 wt% of a nitrogen-containing surfactant, less than 0.12 wt% of a sulfur-containing surfactant or hydrophobic salt and the balance of water. The surfactant oil displacement composition stably exists under the conditions that the temperature is 70-130 DEG C, the total mineralization degree of formation water is (10-25) * 10 < 4 > mg / L, and the concentration of calcium and magnesium ions is (1-2.5) * 10 < 4 > mg / L, and is kept clear without forming precipitates. The interfacial tension of the surfactant oil displacement composition can reach 10 <-2 > mN / m order of magnitude under high-temperature and high-salt conditions, the oil washing efficiency can reach 80% or above, and the surfactant oil displacement composition is suitable for improving the recovery efficiency of a high-temperature and high-salt oil reservoir in tertiary oil recovery.

The invention discloses a sulfur-containing magnetite beneficiation method which specifically comprises the following steps: S1, raw material preparation: crushing sulfur-containing magnetite to obtain small-particle sulfur-containing magnetite; s2, physicochemical property determination: detecting the particle size of the small-particle sulfur-containing magnetite, the content of magnetite in the small-particle sulfur-containing magnetite and the content of sulfur minerals in the small-particle sulfur-containing magnetite; s3, magnetic separation: according to the physicochemical properties of the small-particle sulfur-containing magnetite detected in the step S2, automatically controlling the magnetic field intensity of a magnetic separation process through a controller, and carrying out magnetic separation to obtain magnetite and sulfur-containing ore; the magnetic field intensity of the magnetic separation process is dynamically adjusted according to the iron ore particle size of the sulfur-containing magnetite, the magnetite content in the sulfur-containing magnetite and the sulfur mineral content, the trends of iron minerals and sulfur minerals are accurately controlled, optimal adjustment of the element trends is achieved, and the recovery rate of iron and sulfur is increased.

The invention discloses a method for efficient photo-thermal catalytic degradation of sulfur-containing organic gas. A preparation method of a sulfur-resistant catalyst comprises the following steps: (1) salt containing sulfur-resistant active metal A and an accelerant are added into water to obtain a salt solution of the active metal A, and the active metal A is selected from more than one of Fe, Co, Cu, Mn, Ni, Pt and Sr; (2) adding a salt solution containing an active phase metal B into the carbon dioxide nanotube, carrying out vacuum-assisted confinement, drying and reducing to obtain an active phase material for degrading the sulfur-containing organic gas in the confinement of the titanium dioxide nanotube, the active phase metal B being selected from more than one of Fe, Co, Cu, Mn, Ni, Pt and Sr; and (3) adding the active phase material of the titanium dioxide nanotube for confinement degradation of the sulfur-containing organic gas into the salt solution of the active metal A for coupling to obtain the sulfur-resistant catalyst. According to the method provided by the invention, the catalyst shows excellent catalytic performance in light and heat catalytic systems.

The invention relates to a method for removing sulfur in sulfur-containing sludge. The method comprises the following specific steps: S1, calcining the sulfur-containing sludge at high temperature; s2, mixing the high-temperature calcined sulfur-containing sludge obtained in the step S1 with a sodium chloride solution, and performing wet ball milling to obtain mixed slurry; s3, filtering the mixed slurry obtained in the step S2, and carrying out solid-liquid separation to obtain a solid phase and a liquid phase; s4, an acid leaching reagent is added into the solid phase obtained in the step S3 for acid leaching, and an acid leaching solution is obtained; and S5, carrying out solid-liquid separation on the acid leaching solution obtained in the step S4 to obtain a solid phase and a liquid phase, and washing and drying the solid phase to obtain sulfur-removed sludge. Compared with the prior art, the method is different from a single ion regulation and control technology through a salt dissolution effect mechanism, so that impurities are more effectively removed.

A method for applying a scavenger material to a wellbore includes providing a precursor scavenger material to a location within a wellbore extending through an earth formation, the precursor scavenger material comprising an acetal or a hydroxyaldehyde, reacting the precursor scavenger material in the wellbore or the earth formation in-situ to form a scavenger material comprising propenal, and reacting the scavenger material with at least one of hydrogen sulfide or a mercaptan to reduce a concentration of the at least one of hydrogen sulfide or the mercaptan. Related methods and systems for applying the scavenger material to the wellbore are also disclosed.

The invention belongs to the technical field of oil and gas measurement, and discloses an experimental method and device for obtaining a compression factor of high-sulfur-content natural gas, and the method comprises the following steps: mixing purified natural gas and hydrogen sulfide through a checking system according to gas component parameters of a high-sulfur-content natural gas site to obtain sulfur-containing natural gas; determining the molar mass, the mass flow rate and the volume flow rate of the sulfur-containing natural gas through a standard measurement system; according to the flow value and the pressure value of the purified natural gas measured by the checking system and the volume flow of the hydrogen sulfide, whether the mass flow of the sulfur-containing natural gas measured by the standard measurement system is accurate is determined; and if so, determining the compression factor of the sulfur-containing natural gas according to the gas molar mass, mass flow and volume flow of the sulfur-containing natural gas. The device can simulate working conditions of a high-sulfur-content field, configure gas components consistent with the field conditions and determine the compression factor of gas at a standard detection system, and is clear in overall measurement principle, simple in system and easy to maintain.

The invention relates to the field of industrial wastewater treatment, in particular to an oxidation flocculation treatment system for sulfur-containing wastewater in mancozeb production. The system comprises a parameter acquisition module, a loss evaluation module, a boundary prediction module, a strategy selection module and a dynamic execution module. The system performs feature extraction in combination with the multi-dimensional state parameters of the fluid, and quantifies the buffer capacity loss degree of the sulfur-containing wastewater by using a mapping model; the method is characterized in that the speed of approaching a system failure boundary is predicted based on loss degree change, a fluid regulation and control strategy is generated in combination with a dangerous threshold value, and an oxidizing agent and / or a flocculating agent are / is dynamically controlled to be added for fluid state reconstruction; according to the method, the traditional passive dosing depending on a single instantaneous index is abandoned, a control object is expanded to hidden system buffer toughness, colloidal sulfur enrichment is recognized in advance and other potential risks, the hysteresis defect of a conventional sensor is overcome, prospective early warning is realized, and sludge floating and harmful gas dissipation are effectively avoided.

The invention relates to a catalyst for removing CO in sulfur-containing sintering flue gas and a preparation method thereof. The preparation method comprises the following steps: sulfur-resistant treatment: soaking TiO2 in concentrated sulfuric acid for 12-24 hours, treating for 5-10 minutes under the microwave power of 300-500W, treating for 5-10 minutes under the microwave power of 500-700W, treating for 2-5 minutes under the microwave power of 700-800W, washing and drying; co-impregnation: adding the TiO2 carrier into a mixed solution containing a Pt precursor, a La precursor and a Ce precursor, and carrying out ultrasonic auxiliary impregnation for 1-3 hours; and drying and roasting: drying the impregnated product at 80-120 DEG C for 4-12 hours, and roasting at 400-600 DEG C for 2-4 hours. The catalyst prepared by the method has the advantages of high specific surface area, stable surface sulfur and high utilization rate of active components, and can realize efficient oxidation removal of CO in sulfur-containing sintering flue gas.

The invention discloses a sulfur-containing waste gas and waste liquid treatment method and equipment, and particularly relates to the technical field of sulfur-containing waste gas and waste liquid treatment.The sulfur-containing waste gas and waste liquid treatment method is characterized in that a cracking incineration unit, a catalytic oxidation unit, a condensation and concentration unit and a tail gas purification unit are included; sulfur-containing waste gas and waste liquid are sequentially cracked and incinerated into sulfur dioxide, then converted into sulfur trioxide and condensed to form sulfuric acid, sulfur dioxide in tail gas is converted and washed to form dilute acid, sulfuric acid trioxide mist in the tail gas is removed under the action of a high-voltage electric field, and the tail gas is discharged from a chimney. And the effects of ultra-clean emission and high total sulfur recovery rate are achieved under the condition of meeting tail gas emission indexes.

This invention discloses an S-type heterojunction photocatalyst composed of sulfur-defect-containing indium zinc sulfide and tungsten oxide, its preparation method, and its application. Specifically, this invention involves preparing WO3 nanosheets via a hydrothermal method, then loading them onto the surface of Zn3In2S6 using a solvothermal method, followed by introducing sulfur defects through phototreatment to obtain the S-type heterojunction photocatalyst WO3 / V. S -Zn3In2S6. The S-type heterojunction photocatalyst WO3 / V obtained in this invention. S -Zn3In2S6 exhibits excellent activity, enhanced CH4 selectivity, and good stability in the photocatalytic CO2 reduction reaction. Its preparation method is simple and easy, and it has good application prospects in the photocatalytic CO2 reduction reaction.

The invention discloses a method for evaluating the machinability of sulfur-containing free-cutting steel. The method comprises the following steps: (1) testing the hardness of a section; (2) assigning hardness test data; (3) grade evaluation of sulfide inclusions; and (4) comprehensive assignment calculation is conducted, specifically, the product of the hardness absolute value grade assignment, the hardness standard deviation grade assignment and the sulfide inclusion grade assignment serves as the comprehensive assignment, the turning performance of the materials is sequenced according to the comprehensive assignment, and the smaller the comprehensive assignment is, the easier machining is. According to the evaluation method disclosed by the invention, before the sulfur-containing free-cutting cold-drawing bar is cut, the machinability of the bar is visually evaluated by detecting the hardness, the uniformity of the hardness and the distribution pattern of non-metallic inclusions and through assignment calculation, so that bar processing enterprises can be helped to estimate the processing efficiency and calculate the cost, and the processing efficiency of the bars is improved. And a guiding effect is achieved on enterprise production and operation.

The application relates to the technical field of waste gas treatment, and discloses an activated carbon material, a preparation method and application thereof, and a method for removing and recycling sulfur dioxide in sulfur-containing waste gas. The CO2-TPD test spectrum of the activated carbon material simultaneously contains weak alkaline centers in the range of 80-120 DEG C and medium-strong alkaline centers in the range of 180-260 DEG C, the maximum peak height in the range of 180-260 DEG C is greater than 2000 muV; the activated carbon material has a pore volume ratio of macropores (greater than 100 nm) of more than 70%, an ash content of less than 2%, a high desulfurization rate, good regeneration performance, a SO2 removal rate of more than 99.5%, and an activity stability of more than 99% in 1000 hours.

This utility model relates to a composite purification system for removing sulfur, water, and carbon dioxide from associated gas in oil fields. The system includes an associated gas inlet pipe and is characterized by: a primary absorption tower, a secondary absorption tower, a compressor, a nitrogen source, and a heater. Both the primary and secondary absorption towers are equipped with 13X molecular sieves and 4A molecular sieves. The compressor is installed on the associated gas inlet pipe. The two ends of the primary inlet pipe are connected to the top of the primary absorption tower and the associated gas inlet pipe, respectively. A primary valve is installed on the primary inlet pipe. One end of a primary vent pipe is connected to the primary inlet pipe and is located near the top of the primary absorption tower. A secondary valve is installed on the primary vent pipe. A primary outlet pipe is connected to the bottom of the primary absorption tower. A sixth valve is installed on the primary outlet pipe. The nitrogen inlet pipe is connected to the nitrogen source, and the heater is installed on the nitrogen inlet pipe and located near the nitrogen source. This utility model has a simple structure, low cost, and is easy to move.

The present application relates to a kind of high-carbon chromium bearing steel wire rod containing sulfur and its manufacturing method, belong to wire rod steel field.The chemical composition of wire rod is designed as C:0.95~1.05%, Si:0.15~0.40%, Mn:0.25~0.45%, P:≤0.015%, S:0.020~0.055%, Cr:1.35~1.65%, Al:0.030~0.060%, Cu≤0.10%, Mo≤0.05%, Ni≤0.05%, As+Sn+Sb≤0.015%, O≤0.0006%, Ti≤0.0015%, Ca≤0.001%, the balance is Fe and inevitable impurity element.The production process is: converter initial smelting-LF refining-vacuum degassing-continuous casting-hot delivery-heated casting blank+ breakdown rolling-intermediate billet surface treatment-intermediate billet heating+wire rod rolling-controlling cooling.The present application develops a kind of wire rod easy to turn or deep hole drilling processing, and the production method of the wire rod can save production cost greatly and improve production efficiency.

The invention discloses a method for preparing a soil conditioner from sulfur-containing tailings, a multifunctional soil conditioner is prepared through aging pretreatment, high-temperature activation, sulfur resource recovery and nutrient synergistic blending, and the method is suitable for ecological restoration of mining areas and degraded soil improvement. SO2 is efficiently oxidized and absorbed and converted into sulfuric acid through a two-stage absorption system and a spraying liquid with a specific formula, the sulfuric acid is subsequently used for tailings neutralization, closed-loop circulation of sulfur elements from tailings waste to product components is achieved, and the utilization rate of sulfur resources is greatly increased; meanwhile, unstable sulfides can be effectively decomposed in the high-temperature calcination process, so that part of heavy metals are converted into more stable forms, and the environmental risk is eliminated; venturi washing waste liquid and absorption tower circulating liquid are recycled to respective systems, so that the wastewater generation amount and the fresh water consumption are remarkably reduced.

The utility model belongs to the technical field of tail gas treatment, and particularly relates to a sulfur-containing tail gas treatment device for carbon nano tube production, which comprises two symmetrically arranged reaction tanks filled with alkaline solution; a gas transmission assembly; an infusion assembly; an exhaust assembly; a liquid discharge assembly; when any reaction tank treats the sulfur-containing tail gas, the first three-way valve and the third three-way valve are opened, so that the gas inlet main pipe and the gas exhaust main pipe are communicated with the current reaction tank, the sulfur-containing tail gas reacts with the alkaline solution in the current reaction tank, and other gases are exhausted from the gas exhaust main pipe; and when the alkaline solution in the other reaction tank is saturated, the valve is opened to discharge the alkaline solution from the three-way pipe, then the valve is closed, the second three-way valve is opened, and the alkaline solution is supplemented into the current reaction tank through the liquid inlet header pipe. The continuity of the tail gas treatment process is ensured, and treatment interruption caused by replacement of an alkaline solution is avoided.

The invention relates to the technical field of waste gas treatment, and particularly discloses a sulfur-containing tail gas treatment device and a treatment technology.The sulfur-containing tail gas treatment device comprises a plurality of activated carbon boxes connected in parallel, each activated carbon box comprises a box body and a separation mechanism, each separation mechanism comprises a plurality of separators and baffles, and the separators are arranged in parallel in the axis direction of the box body; a containing cavity used for containing activated carbon is formed between any two adjacent partition pieces, each partition piece is provided with a plurality of penetrating openings, the penetrating openings are in an open state during adsorption and are in a closed state during desorption, the upper end and the lower end of the box body are provided with a second air inlet and a second air outlet respectively, and the first air inlet and the second air outlet are communicated with each other. Each desorption channel can be independently communicated with the gas outlet II, and the baffle plate is arranged in the accommodating cavity and is used for changing the flowing direction of the gas; the interior of the box body is divided into a plurality of desorption channels, and the desorption channels are subjected to desorption treatment in batches, so that uniform and thorough desorption is ensured, and the desorption effect is further ensured.

The invention relates to the technical field of chemical wastewater treatment, and particularly discloses a comprehensive treatment method of sulfur-containing waste alkali, which comprises the following steps: S1, a pretreatment step: storing sulfur-containing waste alkali liquor in an adjusting and homogenizing tank for homogenizing treatment, and then pumping the sulfur-containing waste alkali liquor to a deoiling and diluting tank for standing separation to remove oil and solid impurities; s2, a wet oxidation (WO) step: pressurizing the pretreated waste alkali liquor to 60 bar through a booster pump, mixing the pretreated waste alkali liquor with compressed air with the flow of 230 Nm < 3 > / h, heating the mixture to 178 DEG C through a preheater, enabling the mixture to enter a reactor, carrying out oxidation reaction under the conditions of 200-240 DEG C and 3-5 barg for 30-60 minutes, cooling a reaction product, and enabling the cooled reaction product to enter a gas-liquid separator for separation; through the effects of wet oxidation, evaporative crystallization and chemical oxidation, organic matters and sulfides in the sulfur-containing waste alkali liquor can be efficiently degraded, the COD removal rate is remarkably increased, meanwhile, the common problems of sludge bulking, water quality fluctuation sensitivity and the like in traditional biological treatment are avoided, and the stability and reliability of the treatment process are ensured.

The invention belongs to the technical field of sewage treatment, and particularly relates to a sulfur conversion driven chlorohydrocarbon polluted underground water treatment method. According to the method, the multifunctional biochar is prepared through high-temperature ammonia gas modification, PS can be activated to oxidize and remove chlorinated hydrocarbon, then sulfide reduction is catalyzed to remove residual chlorinated hydrocarbon, a porous structure of BC provides pollutant adsorption and fixation functions, and after MFBC, PS and sulfate reducing bacteria are sequentially added into a chlorinated hydrocarbon pollution medium, the pollution medium is subjected to high-temperature ammonia gas modification to remove the residual chlorinated hydrocarbon. The sulfur-containing species undergo a cyclic conversion process from PS-sulfate ion-sulfide-elemental sulfur-sulfate ion. In the conversion process, various oxidation and reduction active substances can be used for effective detoxification of chlorinated hydrocarbon, and MFBC and sulfate reducing bacteria play a key role in mediating sulfide conversion. According to the method, the chlorohydrocarbon in the high-permeability medium can be rapidly removed firstly, and then the chlorohydrocarbon slowly released by the low-permeability medium can be slowly removed at low cost. And the method is low-carbon and environment-friendly, has no secondary pollution such as heavy metals and has obvious application advantages.

A RedOx furnace and process is provided for regenerating a spent sulfuric acid stream or other sulfur-containing stream by decomposing the spent sulfuric acid stream and / or other sulfur-containing stream to recover sulfur dioxide from the streams. The RedOx furnace includes a reduction chamber having an interior atmosphere, an oxidation chamber having an interior atmosphere positioned downstream from, and in fluid communication with, the reduction chamber, an inlet for supplying a spent sulfuric acid stream or other sulfur-containing stream into the interior atmosphere of the reduction chamber, and an inlet for supplying a pure oxygen stream into the interior atmosphere of the reduction chamber.

The invention relates to the technical field of lead-zinc ore sulfur content determination, and discloses a method for determining the sulfur content in lead-zinc ore and concentrate. The method comprises the following steps: collecting physical and chemical attribute information of a lead-zinc ore or concentrate sample, wherein the information comprises sample quality, particle size distribution and element composition data; generating a fluxing agent proportioning scheme according to the physical and chemical attribute information, wherein the scheme defines the proportional relation of various fluxing agent components; mixing the sample and the fluxing agent according to the proportioning scheme, and putting the mixture into a combustion container; burning the mixture in a high-frequency induction heating mode to generate sulfur-containing gas; measuring a concentration signal of sulfur dioxide in the sulfur-containing gas by adopting an infrared absorption detection technology; and calculating the sulfur content value in the sample based on the concentration signal. According to the method, a fluxing scheme is formulated in combination with sample characteristics, efficient heating and specific detection are matched, the sulfur content is accurately analyzed, and the actual requirements of lead-zinc ore and concentrate detection scenes can be met.

This invention discloses a medium-high carbon sulfur-containing hot-rolled steel plate for precision stamping and its manufacturing method, which mainly solves the technical problems of low elongation and poor fine stamping performance of existing medium-high carbon hot-rolled steel plates. The technical solution is a medium-high carbon sulfur-containing hot-rolled steel plate for precision stamping, with the following chemical composition by weight percentage: C: 0.18%-0.28%, Si: 0.15%-0.40%, Mn: 1.20%-1.50%, Cr: 1.00%-1.40%, S: 0.025%-0.035%, P≤0.018%, Ti: 0.015%-0.040%, Al: 0.001%-0.010%, O: 0.0015%-0.0030%, N≤0.0080%, Ca: 0.0008%-0.0020%, and satisfying Ca / S = 0.03-0.06, Ti / O ≥ 10, with the balance being Fe and unavoidable impurities.

The present application belongs to the technical field of oil and gas field produced water treatment, and particularly relates to an ammonia nitrogen treatment system and method for oil field sulfur-containing produced water. The method comprises the following steps: sending the oil field sulfur-containing produced water into a first buffer pool, reducing sulfides through two-stage aeration of a cyclone aerator and an aeration nozzle device, overflowing from the first buffer pool to a second buffer pool when the first buffer pool reaches a water outlet height, and removing ammonia nitrogen by adding an ammonia nitrogen remover through a conventional dosing port of a dosing device. The present application fully utilizes the characteristics of aeration sulfur removal, and through the addition of a targeted chemical agent and the control of key parameters, purifies and softens the oil field sulfur-containing produced water in one step. After treatment, the water quality only needs to be further filtered by two stages of fine filtration, and the outlet water quality directly meets the steam boiler feed water requirements.

The present application relates to the technical field of ore recovery, and particularly relates to a comprehensive recovery and utilization method of complex associated magnetite, which comprises a pretreatment stage, a sulfur tailing reinforced recovery and a desulfurization flotation operation. The magnetic roller separation device designed by the gradient magnetic field realizes effective separation of magnetic minerals and sulfur-containing minerals, and the two-stage wet magnetic separation equipment is used to improve the recovery rate of magnetic minerals, and then the sulfur content of the iron concentrate is reduced by optimizing the reagent adding mode and the flotation conditions. The present application can significantly reduce resource waste, reduce energy consumption and environmental pollution, and provides a green and efficient comprehensive recovery and utilization solution for complex associated magnetite.

This disclosure relates to a desulfurization method for sulfur-containing wastewater, comprising the following steps: the sulfur-containing wastewater is introduced into an anaerobic biological unit for sulfate reduction treatment to obtain reduced wastewater; the reduced wastewater and oxygen-containing gas are introduced into a hydrogen sulfide stripping unit for stripping treatment to obtain hydrogen sulfide gas products and stripped water; the stripped water is introduced into a water quality stabilization unit for activated carbon adsorption treatment to obtain purified water; the hydrogen sulfide gas products and air are introduced into a biological oxidation unit for hydrogen sulfide oxidation treatment to obtain elemental sulfur and tail gas; the tail gas obtained from the biological oxidation unit is introduced into a tail gas treatment unit, where it undergoes sequential water vapor removal treatment, activated carbon adsorption treatment, and photocatalytic oxidation treatment to obtain purified tail gas. This disclosure enables efficient treatment of high-concentration sulfate wastewater and the recovery of elemental sulfur.

Methods for forming sulfur polyacrylonitrile are provide. In certain variations, the method includes contacting sulfur and polyacrylonitrile to form an admixture, sealing a container holding the admixture, heating the admixture to a first temperature venting the container holding the admixture to release gases generated during the heating of the admixture to the first temperature, re-sealing the container holding the admixture, and heating the admixture to a second temperature. In other variations, the method includes contacting sulfur and polyacrylonitrile to form an admixture, heating the admixture to a first temperature, sealing a container holding the admixture, and heating the admixture to a second temperature. The second temperature is greater than the first temperature.

The invention relates to the technical field of foliar fertilizers, in particular to a sulfur-rich organic matter-containing foliar fertilizer additive for improving the nutritional value of fruits and vegetables. The foliar fertilizer additive containing the sulfur-rich organic matter and used for improving the nutritional value of the fruits and vegetables comprises the following raw materials in parts by weight: 20-30 parts of the sulfur-rich organic matter, 5-10 parts of tea polyphenol, 4-7 parts of a growth regulator, 10-14 parts of a slow release agent, 15-18 parts of bentonite and 4-8 parts of a seaweed extract. The sulfur-rich organic matter serves as a core component, the additive aims to provide necessary sulfur-containing amino acid for plants, and the amino acid plays an important role in various physiological processes in the plants and participates in protein and vitamin synthesis. By combining the tea polyphenol, the growth regulator, the slow-release agent and other functional components, the health state of plants can be comprehensively optimized, the content of amino acids and vitamins in fruits and vegetables is increased, and finally the purpose of increasing the nutritional value of the fruits and vegetables is achieved.