1111 results about "Hydrogen sulfide" patented technology

The invention discloses a hydrogen sulfide leakage abnormity monitoring method and system, and relates to the technical field of gas monitoring. A hydrogen sulfide leakage abnormity monitoring system comprises a data monitoring module, an airflow correction module, a twinborn inversion module, an association judgment module, a leakage confirmation module, a linkage control module and a monitoring updating module. According to the invention, the gas flow field correction is carried out on the hydrogen sulfide concentration by constructing the gas flow vector model and calculating the gas diffusion disturbance coefficient, so that the monitoring result is closer to the real gas distribution, and the space precision and reliability of leakage detection are improved; by establishing a double-physical-field digital twinborn model of a battery thermal field and an airflow field, corrected concentration data is introduced into a coupling domain for numerical evolution, and space inversion positioning and diffusion path prediction of hydrogen sulfide concentration abnormity are realized.

The invention belongs to the technical field of lithium battery materials, and particularly relates to a preparation method of high-purity lithium sulfide. Comprising the following steps: putting lithium hydroxide and pure water into a reaction kettle, replacing air in the reaction kettle with nitrogen, starting the reaction kettle, and stirring and heating; introducing quantitative hydrogen sulfide gas from the bottom of the reaction kettle, and circulating the gas in the reaction kettle between liquid in the reaction kettle and a gas space through a gas circulating pump; and after the temperature of the reaction liquid in the kettle is reduced to 20-30 DEG C, filtering in a nitrogen atmosphere, washing the residual solid with quantitative ammonia water, transferring the filtered solid into a drying box, and purging and drying with nitrogen until no water exists, thereby obtaining the high-purity lithium sulfide. In the solvent method, water is used for replacing an organic solvent for reaction, the problems of organic solvent separation and recovery, hazardous waste treatment and the like are avoided, the cost is reduced, and the method is environment-friendly.

The invention relates to the technical field of gas detection, in particular to response type aerogel and application thereof. The response type aerogel is prepared according to the following steps: mixing and dissolving a metal organic framework material and lead acetate to obtain an adsorption and response integrated probe; mixing silk fibroin, polyethylene glycol diacrylate and the adsorption-response integrated probe, and performing light curing reaction under the action of a photo-crosslinking agent to obtain the adsorption-response integrated probe. Wherein a double-grid aerogel substrate generated by reaction of silk fibroin and polyethylene glycol diacrylate can adsorb water molecules in environments with different humidity to wet the substrate, and a saturated microscopic water environment is provided for colorimetric reaction on the surface of a pore wall, so that interference of environmental humidity on response is effectively relieved. The quantitative method established by using the response type aerogel can be used for high-sensitivity quantitative detection of hydrogen sulfide in livestock and poultry farms.

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 discloses a sulfur-oxidizing bacterium screening and enriching nutrient solution, a sulfur-oxidizing bacterium enriching method and a deodorizing method. The sulfur-oxidizing bacterium screening and enriching nutrient solution comprises 1.0 g.L <-1 > of K2HPO4, 0.5 g.L <-1 > of NaHCO3, 0.05 g.L <-1 > of NH4Cl, 0.225 g.L <-1 > of Na2S. 9H2O and 0.001 g.L <-1 > of trace elements, wherein the trace elements comprise 0.5 g.L <-1 > of EDTA (Ethylene Diamine Tetraacetic Acid), 0.01 g.L <-1 > of (NH4) 6Mo7O24. 4H2O, 0.04 g.L <-1 > of ZnSO4. 7H2O, 0.03 g.L <-1 > of MnCl2. 7H2O, 0.02 g.L <-1 > of CuSO4. 5H2O The deodorization performance of the municipal sewage treatment plant is improved through synchronous desulfurization and deamination of the acidophilic sulfur-oxidizing bacteria, and compared with a traditional deodorization process, the synchronous desulfurization and deamination process can enrich high-abundance sulfur-oxidizing bacteria in a short time and shows higher ammonia gas and hydrogen sulfide removal capacity.

The invention provides a graphene-based hydrogen sulfide gas sensor and a preparation method thereof, and relates to the technical field of gas sensors. The preparation method of the graphene-based hydrogen sulfide gas sensor comprises the following steps: soaking the wood substrate in a mixed metal salt solution containing a water-soluble silver salt and a water-soluble transition metal salt; irradiating the soaked wood substrate by using a laser beam at room temperature under the condition of no shielding gas, so that lignin and cellulose in the wood substrate are cracked and reconstructed to form graphene; meanwhile, the mixed metal salt immersed in the wood substrate is decomposed to form bimetallic oxide nanoparticles including silver oxide nanoparticles and transition metal oxide nanoparticles, and the bimetallic oxide nanoparticles are dispersed on the surface of each layer of graphene to obtain a sensitive layer; and coating conductive materials on the wooden substrate and on the two sides of the sensitive layer to form a connecting electrode in contact with the sensitive layer, thereby obtaining the graphene-based hydrogen sulfide gas sensor.

The invention discloses a water quality monitoring device and a monitoring method thereof, belongs to the technical field of water quality monitoring, and solves the problems that trace hydrogen sulfide generated by sulfate reducing bacteria in a deposited layer at the bottom of a water tank which is not cleaned for a long time in a low-oxygen environment reacts with a platinum membrane electrode of a residual chlorine sensor to generate a platinum sulfide covering layer; and the electrode reading is continuously virtually high and drifts slowly. Comprising an optical transmitting module, an optical receiving module, a spectrum separation module, a signal conditioning module, a lock-in amplification module, a spectrum feature extraction module and a hydrogen sulfide recognition engine. Residual chlorine is monitored in a non-contact mode, deep ultraviolet pulse light is emitted to penetrate through a water body, a reflection spectrum is received, second derivative spectral characteristics are extracted through multichannel signal processing, and multivariable regression compensation is executed to calculate a real residual chlorine value after hydrogen sulfide interference characteristics are recognized. Meanwhile, the drift trend is quantified based on the double-time-constant integral, graded early warning is triggered, industrial standard signals are finally output, and the problem of electrode contact pollution is avoided in the whole process.

The invention provides a sewage steam stripping thermal self-circulation system which is characterized in that a first heat exchanger receives acidic water and is connected with a hot feed inlet of a steam stripping tower through a second heat exchanger, a first gas outlet of the steam stripping tower outputs ammonia gas through the second heat exchanger, and a second gas outlet outputs hydrogen sulfide; a purified water outlet of the stripping tower is respectively connected with a steam reboiler and a purified water inlet of a steam generator, a liquid outlet of the steam reboiler is connected with a condensed water inlet of the steam generator, a purified water outlet of the steam generator outputs purified water through a first heat exchanger, and a steam outlet and a condensed water outlet of the steam generator are connected with a steam compressor. And a steam outlet of the steam compressor is connected with a steam inlet of the steam reboiler. The problem of heat waste of purified water and condensed water can be solved, full utilization of medium-high temperature waste heat is achieved, the heat exchange process of raw material water is improved, the to-be-cooled temperature of the purified water is reduced, and energy loss is reduced.

The invention discloses a P.megaterium strain with stress resistance, growth promotion and environmental restoration functions and application thereof, and belongs to the technical field of microorganisms. According to the present invention, the preservation number of the Pristeria megaterium XT106 provided by the invention is CCTCC (China Center For Type Culture Collection) NO: M 2025912, and the preservation number of the Pristeria megaterium XT106 provided by the invention is CCTCC NO: M 2025912; the Pristia megaterium XT106 provided by the invention is a strain capable of oxidizing manganese to form a biological manganese oxide, and the biological manganese oxide can adsorb and remove heavy metals (Cu, Sb, Pb, Zn, Cd and Cr) and degrade antibiotics (tetracycline and ciprofloxacin). The strain can move, tolerate acid-base, high-salt, phenanthrene and sulfamethoxazole environments, has the capability of generating a biological membrane, and can generate hydrogen sulfide, adsorb / fix and remove heavy metals (Cd, Pb, Zn, Sb and Cu) and promote plant growth.

The present invention discloses a novel gas-sensitive material, specifically a method for preparing a core-shell nanofiber gas-sensitive material based on a platinum-doped cobalt oxide / tin oxide heterostructure. The present invention utilizes a cobalt source, a tin source, a platinum source, and a polymer as raw materials, and produces a nanoscale platinum-doped cobalt oxide / tin oxide gas-sensitive material with high sensitivity and rapid response to hydrogen sulfide gas via coaxial electrospinning. This gas-sensitive material exhibits excellent gas-sensing properties for H2S gas at room temperature, with a short response time, enabling rapid detection of low-concentration H2S gas, a short recovery time, and excellent cyclic stability. Therefore, the gas-sensitive material of the present invention possesses excellent sensitivity and stability, and has broad application prospects, including applications in environmental monitoring, industrial safety, and gas sensors.

The invention discloses pipeline steel for an acid environment, a bimetal metallurgy composite pipe and a preparation method of the bimetal metallurgy composite pipe, and relates to the technical field of manufacturing of pipes for oil and gas gathering and transportation. The pipeline steel for the acid environment comprises the following chemical components in percentage by mass: 0.07%-0.11% of C, 0.25%-0.37% of Si, 1.15%-1.35% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.01%-0.03% of Nb, 0.015%-0.03% of Al, 0.01%-0.025% of Ca, less than or equal to 0.005% of N, less than or equal to 0.002% of O, less than or equal to 0.00015% of H, less than or equal to 0.007% of O + H + N and the balance of Fe and inevitable impurities. The pipeline steel for the acid environment has enough strength, high toughness and good hydrogen sulfide stress corrosion resistance and hydrogen induced cracking resistance, and can meet the requirements of gathering and transportation of corrosive oil and gas.

The invention belongs to the technical field of microorganisms, and particularly discloses a nitrogen-preserving and deodorizing microbial agent as well as a preparation method and application thereof in livestock and poultry manure compost, and the nitrogen-preserving and deodorizing microbial agent is particularly suitable for efficiently removing ammonia gas and hydrogen sulfide. The microbial agent is composed of two kinds of functional deodorization strains, and the two kinds of functional deodorization strains are the bacillus subtilis for composting and the bacillus sojae for soybean, and the two kinds of functional deodorization strains are the bacillus subtilis for composting and the bacillus sojae for soybean. Experiments prove that the two strains have no antagonism, and show good synergistic nitrogen conservation and deodorization capability after being compounded. In practical application, the complex microbial inoculant not only enables the total nitrogen to be increased by 24.95%-31.58% compared with a control group, but also can remarkably reduce the release concentration of NH3 and H2S in the livestock and poultry manure composting process, and the removal efficiency reaches 73.75%-82.32% and 79.73%-96.11% respectively. In addition, the microbial inoculum is simple and convenient in preparation process, convenient to operate in the using process and low in cost, effectively solves the problems of weak nitrogen conservation and deodorization effects, slow effect and the like of the existing microbial inoculum, and has good engineering application value and popularization prospect.

The invention provides a mine complex environment methane monitoring instrument reliability evaluation method and system, belongs to the field of instrument detection, and solves the problems that an existing experiment mode breaks away from the complex environment of a real mine, evaluation standards are statically solidified, and the existing experiment mode is difficult to dynamically adapt to mine environment parameter space-time fluctuation characteristics. And accurate reliability evaluation cannot be provided for the mine complex environment methane monitoring instrument. The method comprises the following steps: carrying out alternating current thermal modulation on the catalytic methane sensing element, and constructing harmonic response mapping of a thermal driving signal and an output signal of the sensing element; performing phase-locked demodulation on the harmonic response under the condition of clean reference gas to obtain at least a second harmonic amplitude and a third harmonic amplitude to calculate a poisoning index; and continuously collecting a change curve of the poisoning index along with time under a set hydrogen sulfide exposure and cleaning recovery cycle working condition, and generating a poisoning index drift rate and an advance index so as to determine a gas interference item reliability evaluation conclusion of the monitoring instrument.

The invention belongs to the technical field of hydrogen sulfide stress corrosion resistance detection of oil well pipes, and particularly relates to a method for testing the influence of anodic dissolution in saturated hydrogen sulfide on stress corrosion fracture of an oil well pipe, which comprises the following steps: respectively carrying out slow strain rate tensile tests in a saturated hydrogen sulfide environment and a nitrogen environment to obtain a stress-strain curve of an oil well pipe sample; measuring a hydrogen permeation curve of the oil well pipe sample in the saturated hydrogen sulfide environment; carrying out fast and slow sweep potential polarization curve test and hydrogen permeation curve test on the oil well pipe, and carrying out hydrogen charging-slow stretching test on the oil well pipe under the cathode hydrogen charging potential corresponding to the steady-state hydrogen permeation current density; and according to the damage degree of the saturated hydrogen sulfide environment to the mechanical properties of the oil well pipe, the minimum influence degree of hydrogen in the saturated hydrogen sulfide environment to the stress corrosion fracture of the oil well pipe is determined by combining the damage degree of hydrogen separated out from the cathode reaction to the mechanical properties of the oil well pipe. The device has the advantages of simplicity in operation and accurate measurement result.

The invention discloses a microbial fermentation chicken manure fish fertilizer for aquaculture and a preparation method of the microbial fermentation chicken manure fish fertilizer, and belongs to the technical field of agricultural waste resource utilization. The method comprises the following steps: firstly, flushing chicken manure of cage rearing chickens with a photosynthetic bacterium solution and screening out particles; then adding EM bacteria and lactic acid bacteria for composting fermentation; drying the fermentation product; and finally adding zeolite powder loaded with photosynthetic bacteria, mixing and modifying to obtain the final fish fertilizer. Through a unique process of combining multi-strain synergistic fermentation and zeolite powder modification, thorough harmlessness and recycling of the chicken manure are realized. The obtained fish fertilizer not only has comprehensive nutrition and lasting fertilizer efficiency, can effectively promote the growth of plankton in an aquaculture pond, but also has the functions of adsorbing and degrading ammonia nitrogen, hydrogen sulfide and other harmful substances in a water body, and has the remarkable advantages of improving water quality, reducing diseases and increasing the culture yield.

The application discloses a kind of iron-based ionic liquid oxidation desulfurization method, hydrogen sulfide gas is introduced into desulfurizer and is desulfurized.Therein, the desulfurizer used includes iron-based ionic liquid, cosolvent and acid control agent, acid control agent is preferably alcohol amine, the use of alcohol amine not only greatly improves the sulfur capacity of desulfurizer, can reach 41.14g / L, simultaneously with H + There is stronger binding capacity, resulting in the initial reaction of homogeneous desulfurizer phase separation, the alcohol amine phase formed by phase separation forms liquid seal relative to iron-based ionic liquid phase, binds the escape of acidic gas in desulfurization liquid, avoids the destruction of desulfurizer structure, the corrosion of equipment caused by strong acidic system and the environmental pollution caused by acidic gas escape, realizes 100% desulfurization.In addition, the desulfurizer described in the application has high thermal stability and chemical stability.

The embodiment of the invention relates to an intelligent treatment method for a toilet peculiar smell source, which comprises the following steps: firstly, acquiring real-time temperature, humidity, various gas concentrations and peculiar smell intensity from a temperature and humidity sensor, an ammonia gas sensor, a hydrogen sulfide sensor, a TVOC (Total Volatile Organic Compound) sensor and a peculiar smell sensor according to a preset frequency to form current monitoring data; then, whether all the gas concentrations exceed the threshold value or not is recognized, if yes, the force of the ventilation and exhaust device is reduced, and the ion generator and the photocatalytic oxidation module are closed; if not, the ventilation force is increased, the device is started, and the deodorant atomizing and spraying device is driven to spray. Then, whether the odor intensity exceeds a threshold value or not is judged, if yes, an environment monitoring vector is generated based on current data, an odor source recognition model is input to obtain a classification vector, the total probability of the sources exceeding the threshold value is counted, a manual cleaning instruction is sent to a cleaning client when the total probability is larger than 0, and precise treatment of the toilet odor is achieved.

The invention discloses a toxic gas detector, and relates to the technical field of toxic gas detection. The negative-pressure fan blades and the auxiliary paddles are arranged in the detection cylinder to form a negative-pressure flow field, and the bottom of the cylinder body realizes self-adaptive speed increase through the gear ring-planet regulation and control mechanism; the separation dust collection box adopts tangential multi-channel air intake and is provided with an inverted-cone-shaped sliding funnel, and particles are separated in a centrifugal mode; purified gas is sent to an electrochemical sensor group through a coaxial central gas inlet pipe, so that high-sensitivity monitoring on hydrogen sulfide, carbon monoxide, oxygen and ammonia gas is realized; the problems that an existing detector is prone to being blocked by dust, insufficient in flow and tedious in maintenance are solved, the detection speed, accuracy and reliability are improved, and the device is suitable for continuous safety monitoring of various high-risk environments such as mines, chemical engineering and municipal pipe networks.

The invention belongs to the technical field of desulfurization gas purification, and particularly relates to a desulfurizing agent and a preparation method thereof. The desulfurizing agent is an iron-zinc-calcium composite oxide material with a hierarchical porous structure, and the preparation method of the desulfurizing agent comprises the following steps: performing amination modification on xanthan gum, then mixing the modified xanthan gum with nano cellulose, and then preparing slurry with a metal salt solution containing Fe, Zn and Ca; performing two-way temperature gradient freezing casting and freeze drying to obtain a precursor; and finally, roasting and activating under programmed temperature control. According to the preparation method, nano-scale dispersion of active components is realized by virtue of strong coordination of aminated xanthan gum and metal ions, and a high-strength and through hierarchical pore framework is constructed by virtue of nanocellulose enhancement and freezing casting. The obtained desulfurizer has ultrahigh one-time sulfur capacity, high mechanical strength and excellent structural stability, is complete in form after being used, is convenient for resource recovery, and is suitable for efficient removal of hydrogen sulfide in industrial gases such as refinery gas.

The invention discloses a phenol-cyanogen wastewater tail gas deodorization treatment process which comprises the following steps: firstly, intensively collecting tail gas through a system consisting of a sealing cover, a collecting pipeline and an induced draft fan aiming at normal-temperature odor containing ammonia gas, hydrogen sulfide and organic waste gas generated by structures such as an adjusting tank and a floatation tank in a phenol-cyanogen wastewater system of a coking plant; the chemical washing tower is used for removing alkaline substances and the like by using a phosphoric acid solution, the biological filter prewashing section is used for absorbing impurities and humidifying gas by using clear water, the biological section is used for degrading pollutants by using microorganisms, the activated carbon is used for adsorbing residual organic waste gas, and finally, the gas reaches the standard and is discharged through a chimney. The process can effectively reduce the concentration of each pollutant in the waste gas, improves the environment quality, provides treatment demonstration for the industry, and has remarkable environmental and economic benefits.

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 discloses a composition for preventing and treating eggplant root rot, and relates to the technical field of biological prevention and treatment. The composition consists of three parts, namely a double-stranded RNA (Ribonucleic Acid) delivery body controlled by a kaolinite nanotube-metal polyphenol network-boric acid ester, a nitric oxide / hydrogen sulfide double-pulse microcapsule and volatile organic compound particles of beta-cyclodextrin cross-linked aerogel, wherein the three parts are matched according to the total mass ratio of 1: (0.8-1.5): (0.8-1.2). Through structural design, time sequence release of non-overlapping peak values is realized, and a prevention and control mode for inhibiting environment enhancement host precise silencing is formed. The deliverer can be selectively disintegrated under the condition of pathogen-induced organic acid, iron chelating agent and hydrogen peroxide, so that the targeted release of the double-stranded RNA is realized; the double-pulse microcapsule respectively releases nitric oxide and hydrogen sulfide in a transplanting stress stage and an early disease stage, and induces host defensive gene expression; the aerogel particles continuously release 2, 3-butanediol and aromatic aldehyde to inhibit germination of pathogenic bacteria and serve as rhizosphere signals to enhance host resistance.

The utility model relates to the technical field of spray towers, in particular to a circulating type hydrogen sulfide purification and recovery spray tower which comprises a spray tower main body, the spray tower main body comprises a water storage tower, the top of the water storage tower is connected with a first tower body, and the top of the first tower body is connected with a second tower body; the circulating water pump is connected to the outer wall of the water storage tower, the water outlet end of the circulating water pump is connected with a circulating water pipe, and the other end of the circulating water pipe is connected with an atomizer; and the filtering assembly comprises a water pumping pipe, the water pumping pipe is connected to the water pumping end of the circulating water pump, and the water pumping pipe penetrates into the water storage tower. The filtering assembly is installed at the water pumping end of the circulating water pump, the pumped water source can be filtered, and therefore impurities are prevented from being pumped, the follow-up atomization spray head is prevented from being blocked, the atomization effect of the atomization spray head is prevented from being affected, and the atomization spray purification efficiency of the device is prevented from being reduced.

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 present application relates to a kind of carbon monoxide sensor with resistance to multiple gas and detection method, belong to coal mine environment gas detection sensor field.The present application includes carbon monoxide sensor, and the method of gas detection of the sensor.Therein, sensor mainly includes carbon monoxide / hydrogen sulfide dual gas detection module, nitrogen oxide detection module, modular mainboard, main shell and main shell display window, wherein carbon monoxide / hydrogen sulfide dual gas detection module and nitrogen oxide detection module measure the gas to be measured.The present application carries out gas concentration value calculation using cross interference compensation algorithm, and the concentration of carbon monoxide gas in coal mine environment is accurately detected by setting different working modes.The present application realizes the real-time monitoring of carbon monoxide, nitrogen oxide and hydrogen sulfide multi-component gas concentration by carbon monoxide, nitrogen oxide, hydrogen sulfide composite electrochemical element design, improves the precise perception ability of intelligent mine, and guarantees coal mine safety production.

The invention provides a limited space operation safety protection method and device, and belongs to the technical field of safety production, and the device comprises an illumination module which employs a head-mounted outdoor lamp induction miner's lamp and is used for providing illumination for an operator in an operation process and providing a light source for a camera; the gas detection module adopts an oxygen, carbon monoxide, hydrogen sulfide and combustible gas four-in-one sensor module and is carried by an operator; the camera monitoring module adopts a portable monitoring camera, videos can be stored and forwarded, and a limited space operation management and control process is migrated to an intelligent management and control platform for real-time online management; a 5G communication technology and a virtual reality (VR) technology are introduced into limited space operation safety management and control; defects of existing equipment are improved, for example, vital sign monitoring content of operating personnel is added, a UWB personnel positioning function is achieved, and video and sound of an operating site and various monitoring data are forwarded and stored in real time for future reference.

The invention relates to the technical field of organic sulfide preparation, in particular to a method for synthesizing and refining dimethyl sulfide (DMS) and dimethyl sulfoxide (DMSO) embedded into a methanol plant, which mainly utilizes high-purity oxygen of an air separation unit of the methanol plant, a high-concentration hydrogen sulfide product of low-temperature methanol washing and part of top gas-phase refined methanol of a pressurizing tower of a methanol rectification device. The production cost of the product is reduced, the added value of the product is improved, and the hydrogen sulfide product of a methanol plant is effectively utilized.

The invention provides an intelligent hydrogen sulfide protection device and an intelligent hydrogen sulfide protection method. The intelligent hydrogen sulfide protection device comprises a device shell, a quaternary sensor array, a dynamic response system and an integrated protection unit, the quaternary sensor array comprises an electrochemical sensor, an NDIR infrared sensor, an environment temperature and humidity sensor and an air pressure sensor; the dynamic response system can perform intelligent assessment according to the safety index information transmitted by the quaternary sensor array and obtain a safety risk assessment value; and the integrated protection unit can perform integrated protection according to the safety risk assessment value. Quick response active protection can be achieved, all the protection units are coordinated and linked, and the protection effect is excellent.

The invention discloses micro-powder-grade lithium sulfide as well as a preparation method and application thereof. The preparation method comprises the following steps: heating lithium hydroxide to an impurity removal temperature under a vacuum condition, and preserving heat to obtain molten lithium hydroxide; the method comprises the following steps: transferring molten lithium hydroxide into reaction equipment, continuously introducing mixed gas containing hydrogen sulfide into the molten lithium hydroxide from a gas inlet at the bottom of the reaction equipment, carrying out stirring reaction at the temperature of 470-650 DEG C, discharging a reaction product into a high-temperature centrifugal machine after the reaction is finished, and centrifuging at the temperature of 500-600 DEG C, so as to obtain the hydrogen sulfide-containing lithium hydroxide. The lithium hydroxide melt obtained through centrifugation is returned to the reaction equipment, and the precipitate obtained through centrifugation is micro-powder-grade lithium sulfide. According to the method, molten lithium hydroxide and hydrogen sulfide gas are subjected to a reaction, lithium sulfide generated through the reaction is high in melting point and can be separated out in the form of small particles, and then the lithium sulfide can be separated from unreacted lithium hydroxide melt through high-temperature centrifugation.

The invention belongs to the technical field of oil and gas storage and transportation, and discloses a novel device and method for online measurement of gas sulfur content in a sulfur-containing gas field pipeline, and the device comprises a natural gas compressor, a gas tank (variable volume type or fixed volume type), a temperature control refrigeration system, a computer, a pressure sensor, a temperature sensor and a plurality of automatic valves. A natural gas sample in a pipeline is introduced into a gas box, the temperature and / or the volume of the natural gas sample are accurately adjusted under the control of a computer, pressure, temperature and volume data in two different states are obtained, the compression factor ratio of gas is calculated accordingly, and the hydrogen sulfide concentration is indirectly determined based on the preset mapping relation between the compression factor ratio and the hydrogen sulfide concentration. The method does not need an optical or electrochemical sensitive element, avoids the interference of field dust and moisture, has the advantages of simple structure, high reliability and low maintenance cost, and is suitable for long-term stable online monitoring of the sulfur-containing natural gas pipeline.