66 results about "Sulfur deposition" patented technology

The invention discloses high-temperature high-pressure multifunctional core sulfur deposition test device and method. The sulfur deposition test device comprises a displacement system, a formation condition analog system, a data acquisition system and a data processing system. The sulfur deposition test method comprises the following steps of: constructing a test environment, measuring the sulfur element deposition on line, observing the sulfur element deposition process on line, and testing the change of permeability of a rock sample before and after sulfur deposition and the like. The invention has the beneficial effects of realizing the visual display of a true core sulfur deposition process, the real-time online measurement of the sulfur deposition and dynamic calculation of core permeability change caused by sulfur deposition and accurately and dynamically evaluating the damage severity of permeability of a reservoir stratum, caused by sulfur deposition in real time, and has the advantages of high degree of automation, good safety, high accuracy, high temperature and high pressure resistance, strong corrosion resistance and the like.

The invention discloses a sulfur deposition device based on a magnetic suspension balance. The sulfur deposition device comprises a displacement system, a stratum condition simulation system, a magnetic suspension balance measuring system and a data collecting and processing system. The sulfur deposition device based on the magnetic suspension balance has the beneficial effects that a high-temperature, high-pressure and high-sulfur-content stratum environment can be truly simulated, the measuring accuracy of the sulfur deposit amount is greatly improved, the viscosity, bulk coefficients and deviation factors of gas are calculated in real time, and the dynamic change of the rock core permeability due to sulfur deposition is measured online in real time. The sulfur deposition device based on the magnetic suspension balance has the advantages of good security, high measuring accuracy, high temperature resistance, high pressure resistance, strong corrosion resistance and the like and further has the important significance to the evaluation of the dynamic influence of the sulfur deposition of a high sulfur gas reservoir to the exploitation.

The invention discloses a well-bore sulfur deposit visual experiment device. The well-bore sulfur deposit visual experiment device comprises a displacement system, a well-bore sulfur deposit analog system, an image collecting system and a waste gas treating system, wherein the displacement system comprises a constant-speed constant-pressure pump (1), a middle container (3), a gas injection pump (4), a sampler (6), a vacuum pump (8), a back pressure pump (20), a back pressure valve (22) and a throttle valve (23); the well-bore deposit analogue system comprises a visual device (14), a visual window (16), a bracket (28) and a multifunctional oven (29); the image collecting system comprises a high-power microscope (15) and a computer (19). The invention further discloses an experiment method adopting the experiment device. The device and the method disclosed by the invention have beneficial effects of being capable of simulating well-bore production conditions, and realizing real-time observation of the whole microscopic dynamic process including an elemental sulfur separation way, elemental sulfur deposition, a crystal growth microscopic dynamic process, deposition morphology, and the like.

The invention provides a sulfur deposition agent composition including a flocculant, alkyl phenol polyoxyethylene ether with the degree of polymerization of 8-12, alkyl phenol polyoxyethylene ether with the degree of polymerization of 4 - 6 and a cosolvent. The invention also provides a method for improving the liquid phase catalytic oxidation desulfurization effect. When the sulfur deposition agent composition is used for liquid phase catalytic oxidation desulfurization process, large sulfur particles (up to maximum 46 [mu]m can be obtained, the sulfur deposition agent composition can effectively inhibit the sulfur foam production, and improve the sedimentation rate of sulfur particles, and more than 96% of the sulfur particles in a desulfurization solution can be rapidly settled.

A method for detecting and controlling the elemental sulfur deposition on pressure reducing gas fuel control valves in cases where the sulfur deposition results from a temperature drop during expansion across the control valve, such as that encountered in gas turbine engines. The control method and algorithm according to the invention uses measured parameters of gas flow rate, pressure and temperature, combined with known pressure reducing valve characteristics to first determine whether sulfur deposition has occurred, and thereafter to calculate a valve position control parameter used to control the gas temperature upstream of the control valve, thereby maintaining the sulfur in a vapor phase through the pressure reducing process and preventing subsequent sulfur deposition on the valve and downstream piping.

Belonging to the technical field of chemical agents for oil and gas fields, the invention relates to an amine sulfur-soluble agent for high sulfur-content gas fields. The amine sulfur-soluble agent for high sulfur-content gas fields provided by the invention is formed by mixing of a formamide physical sulfur-soluble agent and a polyethylene polyamine chemical sulfur-soluble agent. The amine sulfur-soluble agent provided by the invention integrates the respective advantages of the physical sulfur-soluble agent and the chemical sulfur-soluble agent, and has the characteristics of simple preparation, no strong irritation, no odor, low toxicity, small corrosion to metal and high polymer materials, low liquid system viscosity after reaction with sulfur and no influence to later emission. Preparation of the sulfur-soluble agent is simple, has small environmental influence, and is convenient for work operation. The sulfur-soluble agent can be widely used for removing sulfur deposition blocking from high sulfur-content gas well bores, surface pipelines and valves, screen meshes and the like.

The invention relates to a sulfur deposition experimental device of a sulfur-containing natural gas pipeline. The device comprises a gas storage system, a loop system and a sulfur-dissolving agent filling system. The gas storage system and the sulfur-dissolving agent filling system are installed on the loop system. The loop system includes a detachable pipe section having a detachable structure tocarry out experiment conveniently. After ending of the experiment, the device can be fixed by a fixation device and a sulfur deposit is heated and melted. According to the invention, the influences of variables such as the specific time, temperature, pressure, flow rate and pipe wall surface roughness on the sulfur deposition law can be analyzed; and the cleaning effects on the sulfur deposit bydifferent types of sulfur-dissolving agents can be studied, thereby simulating and analyzing the sulfur deposition law in the real high-sulfur-containing natural gas pipeline.

The invention discloses a sulfur deposition inducing and gathering device of a gathering and transportation system. The sulfur deposition inducing and gathering device of the gathering and transportation system mainly comprises a cylinder body, an upper cylinder cover and a lower cylinder cover; an electric heating film is coated on the outer wall of the device; the upper cylinder cover is provided with a natural gas outlet pipeline, a gas evacuating pipeline and as well as a nitrogen injection pipeline; the lower cylinder cover is provided with a liquid sulfur discharge pipeline; the cylinder body is internally provided with a sulfur gathering net and baffling umbrellas; the side wall of the cylinder body is provided with a throttling nozzle connected with a natural gas inlet pipeline. After natural gas with high sulfur content enters the sulfur deposition inducing and gathering device provided by the invention, along with the reduction of temperature, pressure and flow speed, the element sulfur dissolved into sulfur carrying gas is precipitated gradually. Sulfur particles which are carried out from the upstream by gas flows and are precipitated again are gathered in the sulfur deposition inducing and gathering device provided by the invention and treated individually, thereby reducing the sulfur deposition hazard caused by the gathering and transportation system at the downstream. According to the invention, the defects of high production cost, high foundation investment, easiness in hurting people and damaging the environment and the like existed in the traditional sulfur deposition control methods such as physical cleaning and filling of a sulfur dissolving agent, are overcome, and a novel means is provided for the sulfur deposition control of gas field gathering and transportation systems with high sulfur content.

The invention relates to a sulfur solvent for controlling or remitting sulfur deposition, comprising the following components in percentage by weight: 50-90% of sulfur solvent, 1-15% of corrosion inhibitor and 5-40% of carrier oil; the sulfur solvent comprises a compound with a molecular formula of R1-C10H7 or R1-C10H6-R2, wherein R1 and R2 are selected from branched or unbranched and saturated or unsaturated C1-C7 alkyl groups or alkyl-alkene groups; the corrosion inhibitor comprises a compound with a molecular formula of R1-SH-R-R2, wherein R1 is a short-chain alkyl group or a carboxyl group, R is an imidazoline ring having C7-C17 alkyl branched chains, and R2 is an alkyl group or an amide alkyl group; and the carrier oil is CH3(R)aCH3, wherein R is a linear-chain alkyl group or a branched alkyl group. When the temperature of the solvent is 80 DEG C, 17.5g of elemental sulfur can be dissolved in 100g of sulfur solvent; and when the elemental sulfur and the sulfur solvent are mixed in the proportion of 1:1, the oil-water ratio is 1 after the elemental sulfur and the sulfur solvent are separated for 5min.

The invention belongs to the technical field of lithium-sulfur battery cathode materials and in particular to a micro-nanostructured lithium-sulfur battery composite cathode material, a preparation method thereof and a battery. The invention provides a battery composite cathode material which has a core-shell structure. The core-shell structure comprises a metal-carbon shell and a sulfur core disposed in the metal-carbon shell. The metal-carbon shell is formed by doping titanium dioxide with heteroatom. The titanium dioxide coats the interior of the heteroatom-doped carbon. The sulfur core is formed by elemental sulfur. The battery composite cathode material of the invention has the core-shell structure. The metal-carbon shell can improve the electrical conductivity of the battery composite cathode material and can have a confinement effect on the sulfur and the intermediate product polysulfide. The titanium dioxide in the metal-carbon shell can not only adsorb the polysulfide through pro-lithium or thiophilic effect, inhibits the shuttle effect, provides a sulfur deposition site, but also can catalyze the conversion of sulfur and polysulfide, improve the kinetics of electrode process, and increase an electrode conversion rate.

The invention relates to a capacitive type online corrosion monitoring device and method, and belongs to the technical field of monitoring on corrosion of gas conveying pipelines and equipment. The capacitive type online corrosion monitoring device is characterized in that hollow cylindrical corrosion coupon pairs are designed; two to eight groups of corrosion coupon pairs of different sizes are installed; according to the change of the corrosion areas of the corrosion coupon pairs of different sizes under the corrosion environment along with time, the capacitance of a variable capacitor in acorrosion monitoring circuit is changed, so as to complete the online monitoring on the corrosion state of the gas conveying pipeline. A corrosion monitoring method is designed and is characterized inthat the corrosion coupons of different sizes form one to seven groups of variable capacitors; by utilizing the change of output voltage in the corrosion monitoring circuit, the corrosion type, corrosion depth and corrosion rate of the gas conveying pipeline can be monitored on line, so as to provide the reliable basis for the safety early warning, corrosion control and the like on the pipeline.The capacitive type online corrosion monitoring device and method have the advantages that a heat exchange box is arranged on a ground pipeline of a station; the gas in the pipeline is heated by fluegas of a water jacket furnace, so as to reduce the influence to the monitoring effects of the corrosion monitoring device by the sulfur deposition of a sulfur-containing pipeline.

The invention discloses an organic electrolyte for producing hydrogen by electrolyzing hydrogen sulfide at a low temperature, and a cyclic reaction device and process. The invention relates to a novelelectrolyte system for producing hydrogen by electrolyzing hydrogen sulfide at a low temperature. The system can absorb H2S, elemental sulfur has high solubility dependence in the system, sulfur is separated out through slightly high-temperature electrolysis and cooling, the problem of anode passivation caused by sulfur deposition in a direct electrolysis method is solved, and the problem that sulfur is not easy to separate in an indirect electrolysis method is also solved. The invention also relates to the circular reaction device. The device comprises two parallel electrolytic reactor units, a condensation unit, a heating unit, a gas separation unit and pipelines for connecting the units, wherein the pipelines are provided with delivery pumps and valves, so a reaction can be continuously carried out. Through the design of the electrolyte and the circular reaction device, the toxic and harmful gas H2S is decomposed into elemental sulfur and clean energy gas, namely hydrogen at a lowtemperature, and the reaction can be continuously carried out.

The invention, which belongs to the technical field of oil and gas field development, discloses a rock core sulfur analysis system comprising a gas source device (101), a circulating sulfur depositiondevice (102), an analysis device (103) and a desulfurization device (104). According to the invention, the circulating sulfur deposition device (102) connected with gas source device (101) is designed; main components in the circulating sulfur deposition device (102) are arranged in a constant-temperature box (10); an analysis device (103) capable of acquiring and testing reference data of a natural gas sample and a rock core sample in the gas source device (101) and the circulating sulfur deposition device (102) in real time is designed. Therefore, the system can analyze the change conditions of permeability, porosity, sulfur element content and the like of the rock core in the sulfur deposition process under the simulated temperature condition of a real stratum, so that the influence ofsulfur deposition on the rock core is obtained.

The invention discloses a high-sulfur-content gas field pipeline sulfur deposition prediction method. The method comprises the following steps: S1, researching a sulfur deposition mechanism; S2, determining several kinds of parameter data having important influence on sulfur deposition in the pipeline, and performing weight distribution on the parameter data one by one; S3, sampling in the pipeline, acquiring parameter data, and substituting the parameter data into the sulfur deposition prediction model for operation; S4, obtaining a sulfur deposition statistical partition map through statistical analysis of sulfur deposition, and when the sulfur deposition statistical partition map is utilized, performing related calculation point tracing on the parameter data to finally provide technicaland theoretical support for establishment of a sulfur deposition prevention and control method in a pipeline and even a whole pipeline system. According to the invention, the weight matched with theparameter data is analyzed, so the prediction result is more accurate; technical and theoretical supports can be provided for establishment of a sulfur deposition prevention and control method in a pipeline and even a whole pipeline system.

The invention discloses a high-temperature and high-pressure sulfur deposition microscopic seepage visualization experiment device and method. The device is composed of an injection system, a high-temperature and high-pressure visual kettle (14), a pressure supply system, a data acquisition and analysis system, a fluid recovery system and an injection branch pipe; the injection system comprises an ISCo micro-injection pump (1), an intermediate container, a constant-temperature heating box (6) and a pressure gauge (3), the intermediate container is arranged in the constant-temperature heating box (6), and the ISCo micro-injection pump (1) is connected with the intermediate container; the data acquisition and analysis system comprises a microscope (13), a high-brightness light source and a computer (26); the pressure supply system comprises an annular pressure tracking pump (28), a back pressure pump (28), a back pressure valve (18) and a pressure gauge (17); and the fluid recovery system comprises a wide-mouth bottle (21) with a rubber plug, a balance (22), a flowmeter (23) and a tail gas absorption tank (24). With the high-temperature and high-pressure sulfur deposition microscopic seepage visualization experiment device and method of the invention adopted, the problem that the microscopic morphology and the deposition amount of sulfur at the throat of arock core cannot be observed in real time in the previous sulfur deposition microscopic seepage experiment is solved.

The invention relates to a formula of a high-efficiency and environment-friendly sulfur dissolving agent for treating sulfur deposition under an H2S/CO2 (hydrogen sulfide/carbon dioxide) system, whichis mainly used for treating the sulfur deposition on a petroleum production platform. The high-efficiency and environment-friendly sulfur dissolving agent is mainly prepared from the following components of 70 to 80wt% of main agent, 15 to 25wt% of cosolvent and 2.5 to 7.5wt% of corrosion inhibitor, wherein the main agent is prepared from Lewis base, dimethyl sulfoxide and water; the cosolvent isprepared from N,N-dimethylacetamide, organic amine and/or a mixture; the corrosion inhibitor is amide and imidazoline quaternary ammonium salt. The high-efficiency and environment-friendly sulfur dissolving agent has the advantages that the sulfur can be dissolved at high efficiency under the synergistic action of components; the application range of temperature is broad, the low-poison and environment-friendly effects are realized, the smelly odor is avoided, and the like; the high-efficiency and environment-friendly sulfur dissolving agent can be widely applied to the field of oilfield chemical engineering, especially the treatment on sulfur deposition under the H2S/CO2 system.

The invention discloses a sulfur deposition reservoir damage spatio-temporal distribution characteristic prediction method, and relates to the technical field of high-sulfur-content gas reservoir development, in combination with geologic characteristics of a stratum where a to-be-predicted gas well is located, an elemental sulfur dissolution model in the stratum is constructed, and according to the precipitation pressure of elemental sulfur under the stratum condition, a prediction model is established; determining the sulfur deposition state in the stratum and the time when sulfur precipitation begins to occur; and predicting the damage degree of sulfur deposition to the stratum where the gas well to be predicted is located according to the relationship between the amount of sulfur precipitation and deposition in the stratum and the gas phase relative permeability of the stratum. The prediction method not only can predict the time of sulfur deposition of the high-sulfur-content gas well after formation pressure drop caused by exploitation, but also can predict the damage degree of sulfur deposition at different positions to the reservoir, and determines the dynamic change characteristics of the damage of different reef zone sulfur deposition reservoirs along with space and time. Scientific guidance is provided for adjustment of development policies in the sulfur deposition stage, and meanwhile technical support is provided for stable production of gas reservoirs.

The invention belongs to the field of cleaning agents, and particularly relates to a cleaning agent for a high-sulfur natural gas purification device. The cleaning agent at least comprises an oxidation main agent, an oxidation auxiliary agent, a chelating auxiliary agent and water, the oxidation main agent is selected from ferrate; the oxidation auxiliary agent is selected from one or two of chlorate and persulfate; the mass ratio of the oxidation main agent to the oxidation auxiliary agent is (0.1-1.5): (0.01-0.2). The cleaning agent for the high-sulfur-content natural gas purification device is obtained through optimization of a large number of experiments, has multiple functions and has the function of removing ferrous sulfide, sulfur deposition, hydrogen sulfide and other substances at the same time. A protective passivation film can be formed on the cleaned metal surface, corrosion damage of materials to the metal inner wall of the device can be relieved during reproduction, and the service life of the device is effectively prolonged.

The invention relates to a sulfur separating and discharging device for a high-sulfur gas field. The sulfur separating and discharging device mainly comprises a liquid-solid separation tank, a spiralsulfur transporting device, a sulfur tank truck and a data acquisition control module. After a sulfur and water mixture enters a sulfur deposition chamber, natural settlement and separation are performed by relying on the water and sulfur density difference, and a sulfur isolating grid is used for preventing sulfur deposition particles from entering a water phase. The data acquisition control module monitors the height of sulfur deposition at all times. When the thickness of the sulfur deposition reaches a critical value, a motor of the spiral sulfur transporting device drives a spiral blade to rotate, and the sulfur particles are continuously transported downwards with the rotation of the blade under the action of centrifugal force and friction force and enter the sulfur tank truck through a sulfur discharging tube. Compared with the prior art, the operation of a separator of does not need to be stopped in the process of discharging sulfur, normal production is not affected, full sealing, high safety, uniform sulfur discharging speeds, a simple device structure, low construction cost and low maintenance cost are achieved, and the sulfur separating and discharging device has broadapplication prospects.

The invention discloses a carbonyl sulfide hydrolysis catalyst. The carbonyl sulfide hydrolysis catalyst comprises the following components in parts by weight: 0.001-10 parts of gold chloride, 0.001-10 parts of silver nitrate, 0.1-25 parts of an alkali metal compound, 0.1-25 parts of an alkaline earth metal compound, 65-99 parts of a catalyst and 0.01-100 parts of deionized water. The invention belongs to the technical field of catalysts for removing organic sulfur, and particularly relates to the carbonyl sulfide hydrolysis catalyst and a preparation method thereof. The purpose is achieved byadopting bifunctional active component. The catalyst is suitable for a wide temperature range from a low temperature (20 DEG C) to a medium temperature (400 DEG C), has no special limitation on the sulfur content in the raw material, can maintain long-term catalytic activity in the range of oxygen content of 5% in the raw material gas, and has relatively good sulfation resistance and sulfur deposition resistance functions.

The invention provides a method for exploiting a sulfur-containing gas reservoir of carbonate rocks and relates to the technical field of exploiting of the sulfur-containing gas reservoir. According to the exploiting method, a dynamic distribution curve of sulfur deposition saturability of the sulfur-containing gas reservoir is predicted firstly, and the sulfur-containing gas reservoir is exploited according to the dynamic distribution curve of sulfur deposition saturability. The technical problem that shutdown often happens in the actual exploiting process of the sulfur-containing gas reservoir due to the fact that the sulfur solubility is difficult to calculate and sulfur deposition in the exploiting process cannot be reflected really when the sulfur-containing gas reservoir is exploitedis solved with the exploiting method, and the purpose that smooth exploiting of the sulfur-containing gas reservoir can be effectively guaranteed is achieved.

The invention provides a flocculent autotrophic denitrification composite material and a preparation method thereof, and can solve the technical problems of small sulfur particle size and easy loss of sulfur in an existing autotrophic denitrification composite material, and the technical problems of large sulfur particle size, small specific surface area of sulfur in contact with sewage and influence on sewage treatment efficiency. The flocculent autotrophic denitrification composite material is characterized by comprising the raw materials: sulfur powder, insoluble carbonate powder, a surfactant and a flocculant. According to the composite material disclosed by the invention, on the basis that the surfactant is arranged to carry out hydrophilic modification on the sulfur powder and the insoluble carbonate powder, the flocculant is introduced to flocculate the sulfur powder and the insoluble carbonate powder into an integrated floccule, so that sulfur loss can be effectively avoided, meanwhile, sulfur deposition and compaction are avoided, and the sewage treatment efficiency is improved.