679 results about "Hydrogen sulfide" patented technology

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 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 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 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 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 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 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 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.

The utility model discloses an air treatment system which comprises an H2S removal rotating wheel and a first dehumidification rotating wheel which are sequentially arranged, the H2S removal rotating wheel comprises an adsorption area and a desorption area, and the first dehumidification rotating wheel comprises a first dehumidification area, a first regeneration area and a first cooling area; the upstream of the air inlet duct is used for air entering, and the downstream of the air inlet duct is connected with the adsorption area; the treatment air duct comprises a first air duct and a regeneration air duct, the upstream of the first air duct is connected with the adsorption area, the downstream of the first air duct is connected with the upstream of the regeneration air duct, and the regeneration air duct is sequentially connected with the first cooling area, the first regeneration area and the desorption area in series; and the downstream of the regeneration air duct is used for discharging the gas. The air treatment system disclosed by the utility model can effectively remove hydrogen sulfide and moisture in the air, so that the air treatment efficiency and effect are improved.

The invention belongs to the technical field of gas sensors, and particularly relates to a carbon oxide nanohorn modified chitosan composite membrane and a preparation method and application of the composite membrane. The composite membrane comprises a three-dimensional network skeleton formed by chitosan and carbon oxide nanohorns uniformly dispersed on the three-dimensional network skeleton. The preparation method comprises the following steps: mixing the carbon oxide nanohorn and chitosan according to a mass ratio of 1: (8-10), carrying out vacuum defoaming, spreading and drying. The chitosan carbon nanohorn composite membrane can be used as a sensitive layer of a gas sensor or a monitoring device. According to the application, the carbon oxide nanohorn is introduced into the chitosan matrix as a reinforcing phase, so that the performance of the chitosan film sensor in the aspects of hydrogen sulfide gas detection sensitivity, error and stability can be improved.

The invention provides a loess-based hydrogen sulfide adsorbent, a preparation method thereof and application of the loess-based hydrogen sulfide adsorbent in removal of hydrogen sulfide in natural gas. Loess with a specific substance content is taken as a raw material, the material is prepared through pretreatment, modification activation and extrusion molding, and modification activation comprises alkali activation, graphene oxide crosslinking and copper and zinc loading. According to the invention, specific loess is combined with a targeted modification and activation process, so that the porosity and the specific surface area are effectively improved, and a new active phase is formed and endowed with adsorption and catalytic oxidation effects. The prepared adsorbent has the remarkable advantages of low cost, high sulfur capacity, long penetration time, excellent regeneration performance and the like. In a medium-low-temperature dry desulfurization scene, HS (the concentration is reduced to 0.1 ppm or below) in natural gas can be efficiently removed, and the device is particularly suitable for small and medium-sized natural gas purification devices in various process scenes such as a fixed bed and a moving bed, and can also be expanded to various fields such as coal chemical industry, petrochemical industry, biogas purification, environmental protection and the like.

The utility model discloses a triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device, the main body structure of the triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device is a lower sealing occlusion ring and an upper sealing occlusion ring which are occluded up and down, and the triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device comprises the lower sealing occlusion ring and the upper sealing occlusion ring, the bottom face of the upper sealing meshing ring is provided with a triangular cone-shaped meshing groove, and the material has the advantages of being good in high temperature resistance, hydrogen sulfide resistance and abrasion resistance, high in strength and good in toughness. Through the arrangement of the lower sealing occlusion ring and the upper sealing occlusion ring, close fit of the lower sealing occlusion ring and the upper sealing occlusion ring can be achieved, the occlusion face is of the regular triangular cone type three-dimensional structure distributed in the radial direction, the structure has the good impact resistance and anti-scouring characteristics, the overall structure is simple in process, convenient to install and long in service life, and the service life is long. The stable sealing performance of the sealing device in a high-temperature and hydrogen sulfide environment is ensured, and medium leakage is prevented.

The present application relates to the technical field of gas purification and separation, and discloses a selective separation material for carbon dioxide and hydrogen sulfide, which is prepared from 15-25 parts of a hindered hydrazine salt active component, 5-15 parts of a dielectric regulation dissociation agent, 1-5 parts of a proton transfer agent and 55-79 parts of an inert poor water solvent, and preparation is performed by using a step-by-step strategy of pre-solvent activation, dissolution assistance and homogeneous complexing. The present application solves the problems of low solubility of a high-concentration hindered hydrazine salt in a poor water organic solvent and shielding of active sites by introducing a high-dielectric-constant regulating agent to construct a solvent separation ion pair environment. By using the synergistic effect of the large steric hindrance effect of a hindered hydrazine group and a poor water environment, carbon dioxide chemical absorption is strongly inhibited in thermodynamics and kinetics, while the high-efficiency proton transfer and capture capacity for hydrogen sulfide is retained. The material has a very high selectivity factor, excellent hydrogen sulfide absorption capacity and low regeneration energy consumption.

Compositions and methods for removing hydrogen sulfide, gas phase thiol, carbonyl sulfide, and combinations thereof from a gas / vapor stream are provided by utilizing a renewable formulation medium. The composition may include an activated carbon media (BCT-AC media) treated with a binding complex. The compositions and methods offer advantages over currently known technologies by reducing the number of process steps required and thus reduced capital and operating costs, and eliminating aqueous phase processes that are expensive to run and produce undesired waste by-products. In addition, the provided compositions and methods remove hydrogen sulfide as recoverable elemental sulfur, and are ideally suited for use in gas / vapor reactions in which carbon dioxide may be present, as it has no process or economic impact on the composition or process.

The invention provides a method for on-line monitoring of hydrogen sulfide in a drilling process, and relates to the technical field of oil-gas field development, and the method comprises the following steps: preprocessing collected data from different sources to obtain original data; performing influence factor analysis processing on the original data to obtain the original data marked with influence factors; establishing a plurality of model combinations composed of machine learning models, and generating a strong classifier based on the result selection of the classifier; processing the original data marked with the influence factors by using a strong classifier to obtain a hydrogen sulfide pre-monitoring initial model; and performing parameter adjustment on the hydrogen sulfide pre-monitoring initial model by adopting a cross validation method to generate a hydrogen sulfide pre-monitoring final model. A data driving method is adopted, the hydrogen sulfide monitoring model is established by using data generated in the drilling process, hydrogen sulfide is analyzed and pre-monitored in real time, and the real-time performance of monitoring is improved.

The present application relates to the field of drilling fluid filtration, especially to a kind of oil drilling fluid cleaning filtration equipment and its use method.The technical problem is that in the process of cleaning and filtering drilling mud, hydrogen sulfide and gas drilling fluid are wrapped in oil to form bubbles, which are difficult to separate, reduce the recycling rate of gas drilling fluid, increase the cost of oil exploitation, and at the same time, since hydrogen sulfide mixes with air in gas drilling fluid to form flammable and explosive gas, combustion and explosion are easy to occur in the container, which endangers the personal safety of surrounding workers.The technical scheme is: a kind of oil drilling fluid cleaning filtration equipment, including first mounting frame and vibrating screen, etc.;vibrating screen is arranged on the first mounting frame for separating cuttings in drilling mud.The present application realizes the crushing of bubbles on the rotating crushing block by the crushing block, avoids the wrapping of part of gas by oil, ensures the complete separation of gas from oil, and guarantees the liquid-gas separation effect.

The application provides a method for producing biogas by anaerobic fermentation of pea protein wastewater, and relates to the technical field of biomass energy utilization, wherein the chemical oxygen demand is 10000-15000 mg / L, the ammonia nitrogen is 400-800 mg / L, and the sulfate radical is 600-1000 mg / L; the method comprises the following steps: (1) gradient micro-oxygen hydrolysis acidification pretreatment; (2) physical-chemical and biochemical synergistic intensified pretreatment; and (3) anaerobic methane production. The method for producing biogas by anaerobic fermentation of pea protein wastewater is capable of effectively inhibiting sulfate reducing bacteria, reducing hydrogen sulfide generation, reducing free ammonia toxicity and accelerating hydrolysis of macromolecular organic matter through gradient micro-oxygen hydrolysis acidification. In combination with modified tourmaline ceramic and magnetization synergistic treatment, the microbial activity and mass transfer efficiency are further improved. The whole process can be stably operated, the COD removal rate, the biogas yield and the methane content are significantly improved, and the harmless treatment of the pea protein wastewater and the resource utilization of the biogas are efficiently realized.

The invention discloses an MDEA solution thermal regeneration and hydrogen sulfide analysis system and process method, and belongs to the technical field of gas purification and chemical separation. The system comprises a regeneration tower, a kettle type reboiler, a condensate tank and a gas phase balance pipeline, an oil collector is arranged at the bottom of the regeneration tower, and the shell pass liquid level of a kettle type reboiler is controlled by LT2 to be always higher than the top of a heat exchange tube bundle, so that full-immersion corrosion prevention is realized; steam condensate enters the condensate tank through the first condensate outlet pipeline, and the pressure in the condensate tank is synchronous with that of the steam inlet pipeline through the gas phase balance pipeline, so that the condensate is automatically discharged without a pump; and when the gas phase outlet temperature TE2 is smaller than or equal to 125 DEG C and the steam pressure PT1 after pressure reduction is larger than 0.4 MPa, steam is cut off in an interlocking mode, and MDEA thermal decomposition is prevented. The service life, the operation safety and the operation reliability of equipment are remarkably improved.

The invention relates to the technical field of gas separation, and particularly discloses an acid-containing gas absorption method and application thereof. The absorption method comprises the following steps: in an absorption tower, enabling to-be-treated gas containing acid gas to be in contact with alkali liquor, and designing the diameter and the filler height of the absorption tower according to the number and the connection mode of the absorption tower and the gas inflow of the to-be-treated gas. The diameter of the absorption tower and the height of the filler designed by the technical method provided by the invention can realize efficient absorption of the acid gas in the actual production process. The absorption method provided by the invention is especially suitable for removing hydrogen sulfide in oil and gas fields.

This utility model relates to the field of biogas hydrogen sulfide pipeline technology and discloses a protective structure for biogas hydrogen sulfide pipeline corrosion, including a transmission pipeline and a fixing sleeve. A spraying mechanism is fixedly installed on the side of the transmission pipeline, and a flow rate regulating mechanism is fixedly installed on the inner wall of the fixing sleeve. The flow rate regulating mechanism includes a bend, and a connecting block is fixedly installed on the inner wall of the bend. First, the speed of the drive motor is adjusted by the controller, thereby adjusting the flow rate generated when the fan blades rotate. Then, the drive motor is turned on, and the rotation of the drive motor drives the fan blades to rotate, thereby drawing air from outside the bend into the bend. The air is then diverted through the bend and split into eight transmission pipes, and then transmitted through a filter plate to the inside of the transmission pipeline. This adjustment of the flow rate inside the transmission pipeline helps to reduce the corrosiveness of hydrogen sulfide to the transmission pipeline. By controlling the upper limit of the flow rate, erosion corrosion is minimized, thus improving the protection of the transmission pipeline.

This application relates to the field of lubricating oil distillation technology, specifically disclosing a device for removing hydrogen sulfide from waste lubricating oil regeneration distillation tail gas and recycling it. The device includes a base, a distillation vessel, and valves. The distillation vessel is fixedly installed on the upper surface of the base. A first connecting pipe is sleeved at the bottom of the distillation vessel, and an oil storage tank is sleeved at the end of the first connecting pipe away from the distillation vessel. A second connecting pipe is provided at the top of the distillation vessel. This invention can pre-treat waste lubricating oil through a pre-treatment component, preventing mechanical impurities and metal particles contained in the waste oil from clogging the equipment channels during distillation heating. A protective component can buffer the pressure inside the distillation vessel, adjusting the gas flow path according to pressure changes. It can promptly issue an alarm when the pressure is high, and has a dual buffering and dual alarm effect, providing sufficient time for maintenance personnel and improving their personal safety.

The application provides a reactor and a method for preparing hydrogen sulfide, and solves the technical problems of complex structure, low production efficiency and short service life of the catalyst of the existing equipment. The reactor is provided with a shell, an upper head and a lower head, an upper partition plate is arranged between the shell and the upper head, a lower partition plate is arranged between the shell and the lower head, at least one hydrogen gas feeding pipe and at least one sulfur feeding pipe are arranged on the reactor, at least one hydrogen gas discharging hole is arranged on the wall of the hydrogen gas feeding pipe, at least one sulfur discharging hole is arranged on the wall of the sulfur feeding pipe, a mixing pipe is arranged at the central axis of the reactor, at least one gas inlet hole is arranged on the wall of the mixing pipe, and at least one reaction pipe is arranged on the reactor. The application can be widely applied to the technical field of hydrogen sulfide reaction equipment.

The invention discloses a measurement and control method and a measurement and control device for preventing hydrogen sulfide corrosion of an oil well, and relates to the technical field of environmental protection. A stabilization method that a temperature sensor and a liquid level sensor are used for detecting the excessive amount of output zinc carbonate in the working environment of a medicament storage tank, a monitoring method that a 5G data transmission gateway is used for transmission and a central control system is used for monitoring the content of hydrogen sulfide are adopted, the injection amount of the medicament is comprehensively controlled and adjusted, and corrosion of hydrogen sulfide to the wall of an oil casing is prevented; corrosion and permeation to a gathering and transportation pipe network and equipment are prevented, the service life of the whole system from the well bottom to the gathering and transportation pipe network is prolonged, huge maintenance funds are reduced, and a new way for preventing hydrogen sulfide corrosion is developed for an oil field.

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

The invention discloses a preparation method of sodium-mediated lithium sulfide, which specifically comprises the following steps: preparing a sodium ethoxide solution, and dissolving a product obtained after reaction of ethanol and sodium in an organic solvent; adding lithium chloride into the solution for mixing reaction, and centrifuging to obtain a lithium ethoxide solution; introducing hydrogen sulfide gas into the solution, collecting a precipitation product, and calcining to obtain lithium sulfide. The lithium sulfide preparation conditions are mild, the reaction conditions are simple, and the product is easy to collect. The preparation raw materials provided by the invention are metal sodium, ethanol, lithium salt and hydrogen sulfide gas, so that the reaction cost is greatly reduced, commercialization feasibility is realized, and a method for recycling industrial waste gas hydrogen sulfide gas is provided and has certain environmental protection value.

The invention discloses a preparation method of a high-sensitivity room-temperature flexible hydrogen sulfide gas sensor, which comprises the following steps: preparing a laser-induced graphene interdigital electrode in one step by using a carbon dioxide laser, depositing tungsten trioxide microspheres on the surface of LIG by using a film pressing technology so as to construct the hydrogen sulfide gas sensor, and forming a P-N heterojunction with the LIG, thereby obtaining the high-sensitivity room-temperature flexible hydrogen sulfide gas sensor. The response amount of the sensor is greatly improved through the heterojunction structure, the theoretical detection limit is as low as 774 ppt, and the actual detection limit is 3 ppb. The preparation method of the high-sensitivity room-temperature flexible hydrogen sulfide gas sensor provided by the invention has the advantages of high sensitivity, working at room temperature, low detection limit and long-term stability of more than seven months, and can be widely applied to the field of wearable gas monitoring.

The application discloses a carbon dioxide recovery and efficient utilization device and belongs to the technical field of agricultural wastes, comprising an aerobic fermentation tank; a multistage spraying system for removing ammonia and hydrogen sulfide is connected to a gas outlet end of the aerobic fermentation tank; a double-membrane gas holder buffer unit for storing gas is connected to an output end of the multistage spraying system; a gas sending fan is connected to a gas outlet end of the double-membrane gas holder buffer unit; and a farmer's greenhouse is connected to an output end of the gas sending fan through a pipeline. The application recovers carbon dioxide by using fermentation tail gas, and farmers only need to bear pipeline construction and a small amount of operating electricity cost, so that the cost is greatly reduced, a recycling utilization mode of 'waste gas into green carbon' is formed, multiple goals of tail gas deodorization, carbon emission reduction and agricultural yield increase are realized, the development concept of circular economy and green agriculture is met, the combination of planting and breeding circular agriculture is promoted, and the agricultural science and technology level is improved.

The utility model relates to the field of oil and gas exploitation, in particular to a blowout pool for a sulfur-containing gas well, which comprises a combustion cylinder, an ignition system and a spraying system. And the combustion cylinder is arranged in the blowout pool body and is communicated with the tail end of the blowout pipeline. The ignition system comprises a spark plug, and the spark plug is located above the combustion cylinder. The spraying system comprises a spraying pipe, the spraying pipe is located above the open flow pool body, the spraying pipe is used for spraying alkaline liquid, and the spraying range of the spraying pipe can cover the whole open flow pool body. The spraying system capable of spraying the alkaline liquid is arranged above the blowout pool body, so that the alkaline liquid and hydrogen sulfide gas leaked from the combustion cylinder are subjected to neutralization reaction, and leakage and diffusion of the hydrogen sulfide gas can be effectively reduced.