815 results about "Sulfur containing" patented technology

A process system and process method for treating hydrogen sulfide-containing acid gas. The process system comprises a sulfur recovery unit, a tail gas treatment unit having an acid gas concentration function, and a flue gas alkaline scrubbing unit. The method comprises: subjecting sulfur-containing tail gas to concentration treatment by means of an absorption column (1) of the tail gas treatment unit, and then introducing same into the sulfur recovery unit to undergo a Claus reaction for separation, so as to obtain sulfur and sulfur recovery tail gas; introducing the sulfur recovery tail gas into the tail gas treatment unit, successively carrying out combustion and hydrotreating, and introducing the obtained gas into the absorption column (1) of the tail gas treatment unit; and in the tail gas treatment unit, introducing gas absorbed by the absorption column (1) into the flue gas alkaline scrubbing unit, and successively carrying out incineration and alkaline scrubbing, so as to discharge desulfurized gas. The content of SO2 in the tail gas treated by the process system is ≤50 mg / Nm3, and the requirements for full-period standard reaching of sulfur dioxide emission of tail gas during startup, shutdown and normal operations can be satisfied.

Method and device for treating coking wastewater through denitrification and anammox are provided. The device includes an anaerobic reactor, an anoxic reactor, a sedimentation tank, and an aerobic reactor sequentially communicated, and a coking wastewater tank communicated with the anaerobic reactor through an influent pump. The present disclosure promotes the formation of microgranular sludge in the device through a composite powder carrier, and promotes sulfur-based autotrophic denitrification in anaerobic and anoxic zones through pyrite in the composite powder carrier and an additional sulfur source, and promotes anammox in the anaerobic zone through NO2−—N produced by sulfur-based autotrophic denitrification in the anoxic zone. The present disclosure forms a dual-sludge system through the sedimentation tank to reduce reducing inorganic sulfur-containing substances that compete with nitrifying bacteria, and achieves nitrification in the aerobic zone while oxidizing ionic reducing inorganic sulfur-containing substances. The present disclosure discharges treated wastewater through a membrane component.

The invention discloses a preparation method of a nitrogen-phosphorus-sulfur triple-doped hard carbon negative electrode material. The preparation method comprises the following steps: crushing biomass rich in protein, sieving and collecting; the crushed biomass is soaked with a phosphorus source solution, and solid matter is dried after separation; introducing small organic molecule gas into the dried biomass under the protection of inert gas, performing high-temperature pyrolysis to obtain a carbon material, and treating and replacing oxygen-containing functional groups by using nitrogen-containing, phosphorus-containing and sulfur-containing gas; and heating and washing the obtained carbon material by using a strong alkali solution to remove redundant phosphorus source, washing to be neutral, separating, and drying to obtain the nitrogen-phosphorus-sulfur triple-doped hard carbon negative electrode material. The material has an adjustable special hole structure due to cracking and carbonization of small organic molecule gas in pores, affinity of sodium ions and the material is improved due to doping of nitrogen, phosphorus and sulfur, hard carbon interlayer spacing is enlarged due to large atomic radiuses of phosphorus and sulfur, intercalation and deintercalation of the sodium ions are facilitated, sodium modification kinetics is improved, electrode reversibility is improved, and the performance of the electrode is improved. And higher coulombic efficiency is obtained.

The invention provides a method for identifying natural gas causes of a high-sulfur-content gas reservoir and application. The method comprises the following steps: S1, measuring carbon and hydrogen isotope and component data of high-sulfur-content natural gas of a research target layer and data of potential hydrocarbon source rock kerogen isotope and vitrinite reflectivity; s2, carrying out a natural gas sulfate thermochemical reduction reaction simulation experiment, and determining influence factors of the sulfate thermochemical reduction reaction on carbon and hydrogen isotopes and components of natural gas isotopes; s3, carrying out a potential hydrocarbon source rock hydrocarbon generation simulation experiment, and determining the influence of the hydrocarbon source rock thermal maturity on natural gas carbon and hydrogen isotopes and natural gas components; s4, selecting methane carbon and hydrogen isotopes of the natural gas as identification parameters according to the result, and establishing an identification chart of the gas source cause of the high-sulfur-content natural gas; and S5, substituting the measured carbon and hydrogen isotope values of the high-sulfur-content natural gas into the high-sulfur-content natural gas source cause judgment chart, and determining the cause and thermal evolution maturity of the high-sulfur-content natural gas sample.

The invention discloses an experimental device and an experimental method for researching a hydrogen sulfide elutriation mechanism of a sulfur-containing gas reservoir, and belongs to the technical field of natural gas exploitation, the experimental device for researching the hydrogen sulfide elutriation mechanism of the sulfur-containing gas reservoir comprises an artificial core model; at least one acquisition element; and at least one pipe body part and an injection-production assembly. By arranging the pipe body part composed of the inner pipe part and the outer pipe part which can rotate oppositely, the position relation between the inner outlet set on the inner pipe part and the outer outlet set on the outer pipe part can be correspondingly adjusted through relative rotation between the inner pipe part and the outer pipe part, so that the pipe body part and the artificial rock core model are communicated at different layer positions, and the artificial rock core model can be conveniently and rapidly constructed. Therefore, the control operation of the gas injection-production layer is realized, and the simulation of different reservoirs is realized.

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 coking inhibitor and a preparation method thereof. The coking inhibitor comprises a reducing agent, a sulfur-containing substance, a silicon-containing substance and a calcium-containing substance, and the valence of the sulfur element in the sulfur-containing substance is negative bivalence or zero valence. Therefore, by adopting the coking inhibitor provided by the invention, the melting point of the coking body can be reduced, the coking body is promoted to be melted, and the occurrence of a coking phenomenon is favorably inhibited.

The invention discloses a sulfur-containing natural gas detection method and a sulfur-containing natural gas detection system, and relates to the technical field of oil and gas measurement. A detection system based on a sulfur-containing natural gas medium comprises a standard flow measurement unit, a hydrogen sulfide filling system, a detected flow measurement unit and a hydrogen sulfide recovery system. The standard flow measurement unit, the detected flow measurement unit and the hydrogen sulfide recovery system are sequentially arranged in the natural gas inlet direction. The hydrogen sulfide filling system, the detected flow measurement unit and the hydrogen sulfide recovery system are connected in series; the standard flow measuring unit and the hydrogen sulfide filling system are connected in parallel, flow detection of the detected flow measuring unit is not affected by the content of hydrogen sulfide components in an upstream gas source by adjusting the hydrogen sulfide filling system, the gas quality condition and the detection flow of the high-sulfur-content natural gas flowmeter are covered more widely, and stability is better. And the accuracy of the measurement result of the flowmeter used on site is improved.

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.

Provided is a sulfur-containing material which contains a sulfur-modifying compound, has a total sulfur content of 50 mass% or more, and has a ratio (A / B) of 1.5 or less (A / B < = 1.5) between a maximum peak intensity (A) at a diffraction angle (2 [theta]) in the range of 23.0-23.4 DEG and a maximum peak intensity (B) at a diffraction angle (2 [theta]) in the range of 24.8-25.2 DEG as determined by powder X-ray diffraction using a CuK [alpha] ray.

The present invention relates to a process for trapping mercaptans contained in a sulfur-containing hydrocarbon feedstock which is optionally partially desulfurized, resulting from a step of catalytic hydrodesulfurization, at a temperature of between 40° C. and 250° C., a pressure of between 0.2 MPa and 5 MPa, at an hourly space velocity, defined as the volume flow rate of feedstock at the inlet per volume of trapping mass, of between 0.1 h−1 and 50 h−1, in the presence of a trapping mass comprising an active phase based on at least one group VIII, IB or IIB metal, and a porous oxide or oxide mixture, the active metal of which has been activated beforehand by reduction and then passivated for the loading thereof by carbon dioxide treatment.

The present invention provides a ship exhaust gas desulfurization device and a desulfurization method, which include a sulfur-containing ship exhaust gas pretreatment system, a seawater pretreatment system, a membrane contactor, and a seawater post-treatment system; the outlet end of the sulfur-containing ship exhaust gas pretreatment system is connected to the shell-side inlet end of the membrane contactor for sending the dust- and oil-removed exhaust gas into the shell side of the membrane contactor; the outlet end of the seawater pretreatment system is connected to the tube-side inlet end of the membrane contactor for sending the pretreated seawater into the tube side of the membrane contactor; the membrane contactor is a membrane contactor filled with polytetrafluoroethylene hollow fiber hydrophobic microporous membranes; the inlet end of the seawater post-treatment system is connected to the tube-side outlet end of the membrane contactor for post-treating the seawater after absorbing sulfur dioxide and oxidizing sulfite into sulfate. The ship exhaust gas desulfurization device described in the present invention has a high integration degree, a compact volume, and a high desulfurization efficiency, can achieve efficient desulfurization of ship exhaust gas, and has good application prospects.

The invention provides an efficient desulfurizer, which is used for removing H2S and / or organic sulfur in gas, and comprises an organic solvent and organic alcohol amine, optionally, the efficient desulfurizing agent further comprises at least one of an antioxidant, a corrosion inhibitor and a defoaming agent. The invention also provides desulfurization equipment and a method for removing H2S or organic sulfur in sulfur-containing process gas or sulfur-containing waste gas. The high-efficiency desulfurizing agent provided by the invention overcomes the defects of low sulfur load, high regeneration energy consumption, easiness in degradation, incapability of removing organic sulfur and the like of the traditional desulfurizing agent. The method is suitable for desulfurization and purification treatment of sulfur-containing gases such as high-acidity natural gas, refinery dry gas, liquefied gas and sulfur recovery tail gas.

The invention discloses a method for identifying corrosion high-risk points in a sulfur-containing purification plant, relates to the technical field of corrosion analysis and protection, and can accurately identify the corrosion high-risk points in a natural gas purification plant by analyzing corrosion monitoring data in historical periods. The problem that in the prior art, the corrosion high-risk point is inaccurately set depending on experience is solved, and stable operation of a purification plant is guaranteed. And CFD analysis is carried out on the regeneration tower and the reboiler, so that the problem of inaccurate analysis caused by special structures and complex internal flow fields of the regeneration tower and the reboiler is avoided, and high-risk corrosion points in the natural gas purification plant can be comprehensively analyzed.

The invention discloses a pretreatment method and system for sulfur-containing and arsenic-containing ore. The method comprises the steps of crushing, alkaline wet ore grinding, strong alkaline pre-oxidation, cyanidation leaching, cyanogen removal treatment and high alkaline flotation. In the pretreatment process, liquid caustic soda is added into an ore grinding system, and oxygen is introduced into a cyanidation serial stirring tank for pre-oxidation treatment, so that the oxidation activation effect of the arsenic-sulfur minerals is remarkably enhanced, and the gold release efficiency and the cyanidation leaching rate are improved. The same group of serially connected stirring tanks is adopted for pre-oxidation and cyanidation leaching, and the first three stirring tanks are used for pre-oxidation and subsequently communicated with the stirring tanks for cyanidation reaction, so that process integration and equipment reuse are realized. Experimental results show that the comprehensive recovery rate of gold can be remarkably increased, the agent consumption can be reduced, and the method has good industrial application value.

Process for trapping mercaptans contained in a sulfur-containing hydrocarbon feedstock, in the presence of a trapping mass comprising an active phase based on at least one group VIII, IB or IIB metal, and a mesoporous support comprising a bimodal distribution of mesopores, said trapping mass comprising a specific surface area of between 120 m2 / g and 350 m2 / g, and:the volume of mesopores with a diameter greater than or equal to 2 nm and less than 20 nm corresponds to between 35% and 70% by volume of the total pore volume of said trapping mass;the volume of mesopores with a diameter greater than or equal to 20 nm and less than 50 nm corresponds to between 25% and 60% by volume of the total pore volume of said trapping mass.

The invention provides a process system for recovering elemental sulfur and co-producing methanol from sulfur-containing tail gas, the process system comprises an elemental sulfur recovery system and a methanol synthesis system, the elemental sulfur recovery system comprises a membrane separation unit, a hydrogen sulfide thermal decomposition furnace, a sulfur production waste heat boiler, a waste heat boiler, a tail gas liquid separation tank, a tail gas waste heat unit, a hydrogenation reactor, an MDEA absorption tower and an MDEA hydrogen sulfide regeneration tower; the methanol synthesis system comprises a methanol reaction tower, a high-pressure separator, a low-pressure separator, a rectifying tower and a PSA adsorption tower II. According to the process system disclosed by the invention, energy conservation and consumption reduction are realized to the greatest extent, the process system is particularly more effective in matching use with a methanol production project, up-to-standard emission of sulfur-containing tail gas can be realized, and effective hydrogen and effective carbon in the tail gas can be reasonably recovered.

The invention discloses a high-sulfur-content natural gas elbow sulfur particle deposition simulation experiment device and a testing method, and relates to the technical field of high-sulfur-content natural gas gathering and transportation pipeline sulfur particle dynamic deposition. The sulfur particle deposition simulation experiment device for the high-sulfur-content natural gas pipeline can simulate the dynamic deposition process of sulfur particles under various working conditions such as different flow rates of the sulfur particles, different flow rates of gas, different particle sizes of the sulfur particles, different pipeline pressures, different pipe bending angles and different pipe bending materials; through the two-stage recovery and two-stage purification scheme of the activated carbon adsorption device, the cloth bag dust collector and the secondary filter screen, the sulfur particle recovery rate is highly reliable, and the danger to the environment and testers is remarkably reduced; and through the coupling design of the micro vibrator and the sulfur particle injection device, the problem of blockage caused by sulfur particle agglomeration is effectively solved, and the manual intervention frequency is reduced.

The invention discloses a dynamic early warning method for a high-sulfur-content natural gas leakage influence range in the field of leakage gas monitoring. The method comprises the following steps: arranging an intermediate infrared laser remote measurement system in a high-sulfur-content natural gas field to monitor the concentration of hydrogen sulfide gas in the gas field in real time; judging whether the gas field is leaked or not according to the concentration of the hydrogen sulfide gas, if so, executing the next step, otherwise, repeating the judgment; calculating leakage flow and leakage hole radius; and substituting the leakage hole radius and the leakage flow into the optimized time sequence Gaussian smoke cloud model to obtain the concentration values of the hydrogen sulfide gas at different moments and different spatial positions, namely the influence ranges of the leakage gas at different moments. According to the method, the size of the leakage hole can be calculated, the dynamic correction process of the three-dimensional leakage range of the Gaussian model is completed, various conditions of mixed gas leakage factors are considered at the same time, and the dynamic calculation process of the influence range of the leakage gas is achieved.

The invention relates to an oxygen vacancy-rich modified zero-valent iron / biochar composite material and application thereof. The modified zero-valent iron / biochar composite material comprises a biochar carrier and zero-valent iron loaded on the biochar carrier, the surface of the zero-valent iron is coated with sulfur-containing ferrides and / or boron-containing ferrides, and the surface of the zero-valent iron contains rich oxygen vacancies; the modified zero-valent iron / biochar composite material is specifically prepared by the following steps: dispersing a biochar carrier and zero-valent iron in oxygen-free water, and grinding; adding a sulfur source or a boron source into the ground suspension, fully stirring and grinding, and drying; and soaking in a reducing solution, calcining at high temperature, and cooling to obtain the modified zero-valent iron / biochar composite material. Compared with the prior art, the modified zero-valent iron / biochar composite material prepared by the invention can be synergistically used with a compound oxidant to realize effective remediation of organic contaminated soil.

The invention relates to a method for repairing circumferential welds of a sulfur-containing gas field long-term service low-alloy steel gathering and transportation pipeline, and belongs to the technical field of metal pipe repairing. The repairing method comprises the following steps that dehydrogenation heat treatment and destressing annealing heat treatment are sequentially conducted on the low-alloy steel gathering and transportation pipeline circumferential weld to be repaired, and then the low-alloy steel gathering and transportation pipeline circumferential weld to be repaired is repaired through carbon fiber cloth. According to the repairing method disclosed by the invention, the circumferential weld is repaired from two aspects of material and stress aiming at the situation that the sulfur resistance of the circumferential weld of the low-alloy steel gathering and transportation pipeline serving in the sulfur-containing gas field for a long time is reduced and the stress cracking risk of sulfide is improved; according to the method, the sulfur resistance of the circumferential weld can be effectively repaired quickly and conveniently, the stress cracking risk of sulfide is reduced, the problem that an existing pipeline circumferential weld repairing method only aims at the defects of corrosion and the like is solved, and powerful technical support is provided for guaranteeing long-term service safety of a sulfur-containing gas field low-alloy steel gathering and transportation pipeline.

The invention provides a heavy metal stabilization method for sulfur-containing tailings, and belongs to the technical field of heavy metal pollution remediation. The method provided by the invention comprises the following steps: mixing the sulfur-containing tailings with a stabilizer to obtain a mixed material; the OCP value of the stabilizer is lower than that of metal carrier sulfide minerals in the sulfur-containing tailings; and after the mixed material is leached with an ethanol solution, maintenance is conducted, and the stable sulfur-containing tailings are obtained. According to the method provided by the invention, based on the primary battery effect, the stabilization of the heavy metals in the sulfur-containing tailings is realized in a sacrificial anode manner, and the stabilization effect of the heavy metals in the sulfur-containing tailings can be remarkably improved by combining with quenching of free radicals by leaching of the ethanol solution. The result of the embodiment shows that the stabilization rate of lead in the sulfur-containing tailings can reach 79.1% or above, the stabilization rate of cadmium in the sulfur-containing tailings can reach 14.7% or above, and the method has an excellent stabilization effect on lead and cadmium in the sulfur-containing tailings.

The invention provides a method and a device for quickly and sensitively detecting a trace amount of sulfur-containing sample on site. The method comprises the following steps: adopting a Fourier deconvolution multiplexing ion mobility spectrometry technology, a negative ion mode and a thermal desorption sampling mode, and ensuring that migration gas and carrier gas do not need any chloride additive; an analysis method for directly separating an air reagent ion peak (O2 (H2O) n) and a sulfur product ion peak through ion mobility spectrometry and effectively separating sulfur-containing samples and nitrogen-containing samples such as black powder is established. According to the invention, the resolution ratio of the air reagent ion peak can be improved, the separation degree of a compound which is very close to the migration time of the air reagent ion peak can be improved, the effective separation of sulfur-containing samples such as black powder from the air reagent ion peak can be realized, and the analysis and recognition capability of the ion mobility spectrometry on the sulfur-containing samples such as black powder and nitrogen-containing samples can be improved.

The utility model discloses a crude sulfur treatment system which comprises a hot filter, a liquid inlet pipe, a blow-off pipe, a purging pipe, a steam pipe and a condensate water discharge bypass pipe, one end of the liquid inlet pipe is connected with the hot filter, the other end of the liquid inlet pipe is connected with a slurry pump placed in a crude molten pool, and a liquid inlet heat preservation valve is installed on the liquid inlet pipe; one end of the blow-off pipe is connected with the hot filter, the other end of the blow-off pipe extends into the rough molten pool, and the blow-off pipe is provided with a blow-off heat preservation valve; one end of the purging pipe is connected with the liquid inlet pipe and located between the hot filter and the liquid inlet heat preservation valve, and the other end of the purging pipe is provided with a purging heat preservation valve. One end of the steam pipe is connected with the purging heat-preservation valve, and the other end of the steam pipe is connected with a steam source; one end of the condensate water discharge bypass pipe is installed on the steam pipe, and a condensate water discharge valve is installed on the condensate water discharge bypass pipe. The device can improve the yield of sulfur and reduce the sulfur content of hot filter residues.

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.

The invention discloses a low-temperature-bending-resistant sulfur-free fireproof coating for packaging aerogel felt and a preparation method thereof. The coating comprises the following components in parts by weight: 35-50 parts of sulfur-free resin, 20-45 parts of pigment paste, 0-20 parts of a flame retardant, 0.1-2 parts of a defoaming agent, 0.1-2 parts of a substrate wetting agent, 0.5-2 parts of a thickening agent, 0-10 parts of an anti-freezing agent and 0-10 parts of a plasticizer. According to the invention, the sulfur content of the resin, the pigment and the additive adopted by the coating is measured, and the resin with the sulfur content not detected in the test result is selected to design the formula of the sulfur-free coating, so that the sulfur-free coating which passes a dryness test and a low-temperature flexibility test is obtained and can be applied to aerogel felt packaging. Furthermore, by adding a specific flame retardant, the fireproof performance (grade to 1-5) and good heat insulation performance can be achieved at the same time.