38results about "Hydrogen sulfides" 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.

A reactant generation system for a continuous production lithium sulfide fluidised bed reactor is disclosed which comprises a hydrogen generator in fluid communication with a natural gas source and a

A method for producing a chalcogen-containing compound semiconductor is provided, the method comprising: providing a processing chamber (3) with at least one substrate (5) coated with a precursor (4) of the chalcogen-containing compound semiconductor; heat-treating the at least one coated substrate (5) in the processing chamber (3), wherein during the heat treatment, a gaseous atmosphere containing at least one gaseous chalcogen compound is provided in the processing chamber (3); removing the gaseous atmosphere present after the heat treatment of the coated substrate (5) as exhaust gas from the processing chamber (3); and cooling the exhaust gas in a gas processor (13), wherein multiple types of gaseous chalcogen compounds present in the exhaust gas after the heat treatment of the coated substrate (5) are converted to liquid or solid states, thereby separating them from each other in time and space from the exhaust gas. An apparatus designed to carry out this method is also provided.

The invention belongs to the technical field of chemical separation, and discloses a two-stage low-temperature condensation coupling compression separation high-purity hydrogen sulfide purification process and system. The system consists of a two-stage low-temperature condensation unit, a hydrogen sulfide compression unit and a hydrogen sulfide collection unit, the two-stage low-temperature condensation unit comprises a hydrogen sulfide liquid separation tank, a hydrogen sulfide low-temperature cooler, a hydrogen sulfide low-temperature liquid separation tank, a hydrogen sulfide heat exchanger and a hydrogen sulfide saline water liquid separation tank. Hydrogen sulfide raw material gas containing carbon disulfide impurities is sequentially introduced into a two-stage low-temperature condensation unit, carbon disulfide is liquefied and separated out preferentially, low-temperature water is adopted in the first stage, and materials subjected to cryogenic compression throttling are adopted in the second stage for heat exchange; pressurizing and compressing the primarily purified hydrogen sulfide gas-phase component, and then condensing and separating to remove trace carbon disulfide and recover cold energy, thereby finally obtaining the high-purity hydrogen sulfide with the purity of more than or equal to 99.95%. According to the invention, a low-temperature two-stage low-temperature condensation-pressurized compression condensation coupling separation technology is adopted, and deep removal of carbon disulfide is realized under the condition that a third component is not introduced.

The present application relates to the technical field of recycling of organic waste liquid, and particularly relates to a system and method for regenerating hydrogen sulfide and carbon dioxide by using MEDA waste liquid. The system for regenerating hydrogen sulfide and carbon dioxide by using MEDA waste liquid provided by the present application comprises: a MEDA waste liquid tank; a lean-liquid rich-liquid heat exchanger connected with the MEDA waste liquid tank; a regeneration tower connected with a rich-liquid outlet of the lean-liquid rich-liquid heat exchanger; a cooler connected with a gas outlet of the regeneration tower; and a membrane separation device connected with a gas outlet of the cooler; and the membrane separation device is provided with a hydrogen sulfide gas outlet and a carbon dioxide gas outlet. The system and method for regenerating hydrogen sulfide and carbon dioxide by using MEDA waste liquid can remove the dissolved waste gas in the MEDA, realize the recycling of the MEDA solution, and simultaneously produce high-purity hydrogen sulfide and food-grade carbon dioxide products.

Methods for harvesting hydrogen from a natural hydrogen production zone are described. The method comprises introducing a stream (e.g., injection stream, sequestration stream) comprising sulfur dioxide into a natural hydrogen production zone to produce a gas mixture containing hydrogen sulfide; harvesting the gas mixture containing hydrogen sulfide; and converting the hydrogen sulfide to hydrogen, thereby harvesting hydrogen from the natural hydrogen production zone. The natural hydrogen production zone can be a ground subsurface or a subsurface of the ocean floor. Introducing the stream comprising sulfur dioxide can be performed by injection, sequestration, pumping, infusion or other methods for delivering sulfur dioxide to a well (e.g., gas injection well) at the natural hydrogen production zone.

The present application pertains to a method of making carbon disulfide. The method comprises reacting methane and sulfur under conditions sufficient to produce carbon disulfide, hydrogen disulfide, and heat. At least a portion of the produced hydrogen disulfide is reacted with methane under conditions sufficient to produce a mixture comprising carbon disulfide and hydrogen. Advantageously, at least a portion of the heat from reacting methane and sulfur is employed in the reacting of at least a portion of the produced hydrogen disulfide with methane.

A method for producing hydrogen sulfide by reacting sulfur gas and hydrogen gas in a reaction tank (101) to synthesize hydrogen sulfide, the method including: step (A) for supplying a gas mixture of sulfur gas with hydrogen gas to the reaction tank (101); step (B) for supplying hydrogen gas to the reaction tank (101); and step (C) for reacting the sulfur gas with the hydrogen gas to synthesize hydrogen sulfide. The amount of sulfur in the reaction tank (101) is detected and the amount of the hydrogen gas supplied in step (B) is adjusted according to the result.

Methods and systems are provided for treating the tail gas stream of a sulfur recovery plant. The methods including generating a tail gas stream from a sulfur recovery plant, treating the tail gas stream with a hydrogen sulfide removal unit and a hydrogen selective membrane unit, generating a stream low in hydrogen sulfide and a stream rich in hydrogen. The hydrogen sulfide rich stream is recycled to the sulfur recovery unit. The hydrogen selective membrane unit includes a glassy polymer membrane selective for hydrogen over hydrogen sulfide and carbon dioxide.

The present invention relates to a preparation method of lithium sulfide having excellent performance as a solid electrolyte raw material, and lithium sulfide prepared therefrom. Specifically, the present invention relates to: a preparation method of lithium sulfide, comprising adjusting, during preparation of lithium sulfide, the particle size of raw materials and reaction conditions so as to minimize residual impurities in lithium sulfide, and improving the flow characteristics and aggregation characteristics of particles, thereby providing an excellent solid electrolyte raw material; and lithium sulfide.

The present invention relates to a process for cleaning a CO2-rich gas feed, in the presence of a hydrogen-rich feed, in particular for removing sulfur-containing impurities, and optionally oxygen.

The application provides a titanium dioxide type low-temperature hydrogenolysis catalyst and a preparation method and application thereof. The catalyst comprises a titanium dioxide carrier and an active component loaded on the titanium dioxide carrier, and the active component comprises scandium oxide and tungsten oxide. The preparation method of the catalyst comprises the following steps: dipping the titanium dioxide carrier in a mixed solution of scandium salt and tungsten salt for a period of time, so that the scandium salt and the tungsten salt are loaded on the titanium dioxide carrier; and then drying and calcining the titanium dioxide carrier loaded with the scandium salt and the tungsten salt, to obtain the titanium dioxide type low-temperature hydrogenolysis catalyst. The catalyst has good sulfur dioxide hydrogenation activity and organic sulfur hydrolysis activity, and can be applied to a process for treating sulfur recovery tail gas at a low temperature of 210-220 DEG C.

The application belongs to a device and method for co-production of industrial and electronic grade hydrogen sulfide from sulfur-containing tail gas; comprising a sulfur-containing tail gas pipeline, the sulfur-containing tail gas pipeline is connected with a light-removing rectifying tower through a first heat exchange pipeline of a raw material compressor and a main cooler, a liquid phase outlet of the light-removing rectifying tower is connected with a heavy-removing rectifying tower, a gas phase outlet of the heavy-removing rectifying tower is connected with a second gas-liquid separator through a heavy-removing condenser, a liquid phase outlet of the second gas-liquid separator is respectively connected with a reflux port of the heavy-removing rectifying tower, an industrial grade product storage tank and an electronic grade hydrogen sulfide preparation part; the electronic grade hydrogen sulfide preparation part comprises a refining tower, a gas phase outlet of the refining tower is connected with a third gas-liquid separator through a refining condenser, a liquid phase outlet of the third gas-liquid separator is respectively connected with a reflux port of the refining tower and an electronic grade product storage tank; having online flow distribution and adjustment, and being capable of continuously and flexibly adjusting the output proportion of two different grade products according to market demand without stopping.

The application discloses a preheating type stirring device for hydrogen sulfide production and relates to the technical field of hydrogen sulfide production. The device comprises a jacket arranged outside a reaction kettle, the inside of the jacket is filled with heat exchange medium to heat or cool the reaction kettle; a material turning part is arranged to lift the raw material at the bottom of the reaction kettle and spread along the inner wall of the reaction kettle; a material stabilizing frame is arranged on the inner wall of the reaction kettle to support the solidified raw material. The material turning part is arranged to pump the liquid sulfur at the bottom of the reaction kettle upwards and make it flow downwards along the inner wall of the reaction kettle. In the preparation process, the liquid sulfur and hydrogen gas have a larger contact area, so that the reaction rate is improved. After the production is completed, the heat flow provided to the jacket is stopped, the temperature in the reaction kettle is gradually reduced, the liquid sulfur is still sprayed on the inner wall of the reaction kettle in the above manner, the liquid sulfur is solidified on the inner wall of the reaction kettle, and subsequent continuous heating and preservation are not needed.

This invention provides a method for preparing hydrogen and sulfur from solid waste gypsum through reduction and acidification in a cement kiln, relating to the field of solid waste disposal technology. The method involves targeted local modifications to a novel dry-process cement clinker rotary kiln production system. Using desulfurized gypsum, phosphogypsum, and other solid waste gypsum as raw materials, the gypsum is crushed, ground, preheated, and dehydrated. Then, it is calcined in a modified three-lobe gravity semi-suspended rotary kiln at 800–1100℃ in a reducing atmosphere to generate high-purity calcium sulfide. After sealed cooling, the calcium sulfide reacts with byproduct hydrochloric acid to produce high-purity hydrogen sulfide. The hydrogen sulfide is then used to co-produce hydrogen and sulfur via a medium-assisted electrochemical decomposition method, or high-purity sulfur can be directly prepared using the Claus process. This invention achieves full resource utilization of solid waste gypsum using existing cement kiln equipment, requires minimal modification, has low investment costs, and enables the cascade utilization of CO waste gas and kiln waste heat, reducing overall energy consumption by more than 30% compared to traditional processes.

The invention discloses a sulfur vapor recovery device and a sulfur vapor recovery method. The device comprises a sulfur melting tank, a liquid sulfur recovery device, a temperature regulator, a liquid sulfur recovery tank and a synthesis tower, the sulfur melting tank is respectively connected with the liquid sulfur recovery device and the synthesis tower; one end of the thermolator is connected with the top of the synthesis tower, the other end of the thermolator is connected with the liquid sulfur recovery tank, and the other end of the liquid sulfur recovery tank is connected with the middle of the synthesis tower. And the recovered sulfur steam finally flows back into a reaction or storage device for generating the sulfur steam in a liquid sulfur form, so that the intermediate process is reduced, and the operation stability of the device is improved.

A system and method of continuously producing lithium sulfide from a lithium-bearing feedstock is disclosed which comprises introducing a continuous feed of the lithium-bearing feedstock into a fluidi

A method for producing hydrogen sulfide, in which hydrogen sulfide is synthesized by causing sulfur gas and hydrogen gas to react in a reaction tank (101), the method comprising: a step (A) of supplying a mixed gas of sulfur gas and hydrogen gas to the reaction tank (101) ; a step (B) of supplying hydrogen gas to the reaction tank (101); and a step (C) of synthesizing hydrogen sulfide by causing sulfur gas and hydrogen gas to react, wherein an amount of sulfur in the reaction tank (101) is measured, and a supply amount of the hydrogen gas in the step (B) is adjusted based on a result of the measurement.

The application provides a system and method for treating high-concentration organic wastewater containing sulfate, belonging to the technical field of industrial wastewater treatment, and is used for solving the problems that in the related art, sulfate-reducing bacteria and methanogens compete for substrates, resulting in low methanogenesis efficiency, and sulfide accumulation inhibits microbial activity. The system separates and couples a methanogenesis electrochemical oxidation unit and a sulfate bioreduction and sulfur fixation unit through an ion exchange membrane and an external circuit, constructs a cross-serial multi-stage treatment structure, integrates intelligent collaborative control and sludge resourceization units, realizes the simultaneous performance of efficient methanogenesis of organic matter, deep sulfate reduction and in-situ sulfur fixation, has high removal rates of COD and sulfate in the treated effluent, has low H2S content in the produced biogas, and can recover sulfur and iron resources.

The invention relates to a device for preparing hydrogen sulfide based on reaction thermal coupling and a preparation method thereof.The device is composed of a filtering system, a thermal reaction system, a purification system and a reaction kettle, heat of the thermal reaction system is cyclically used or supplied to the filtering system and the purification system, and the reaction kettle is a double-cavity reaction kettle. An annular circular-truncated-cone-shaped transverse partition plate is arranged in the middle of the reaction kettle to divide the interior of the reaction kettle into an upper cavity and a lower cavity, the upper cavity is a mixing cavity, the lower cavity is a thermal reaction cavity, a stirring shaft is arranged in the mixing cavity and the thermal reaction cavity, a push type paddle is installed on the stirring shaft located in the upper cavity, and an anchor type paddle is installed on the stirring shaft located in the lower cavity. A feeding hole is formed in the upper chamber, a hydrogen sulfide gas outlet and a byproduct outlet are formed in the lower chamber, the feeding hole is connected with a filtering system and a sulfuric acid storage tank, and the byproduct outlet is connected with a purifying system.

The invention relates to a device and a method for treating tail gas in a sulfur recovery process, and belongs to the technical field of waste gas treatment of high-sulfur gas field purification plants. The tail gas treatment device in the sulfur recovery process comprises a pretreatment unit and a tail gas incineration unit, a stop valve is arranged on a connecting pipeline of the pretreatment unit and the tail gas incineration unit, and a hydrogen sulfide-carbon dioxide absorption and regeneration unit is connected to an upstream pipeline and a downstream pipeline of the stop valve in parallel. According to the tail gas treatment device in the sulfur recovery process, the hydrogen sulfide-carbon dioxide absorption and regeneration unit comprising the tail gas absorption tower is connected between the pretreatment unit and the tail gas incineration unit in parallel, so that hydrogen sulfide and carbon dioxide in pretreated tail gas can be further removed, and then the flow of inert gas entering an incinerator is reduced; therefore, the fuel gas amount consumed by the incinerator is reduced.

The utility model belongs to the technical field of sulfide preparation, and particularly relates to a system for continuously preparing hydrogen sulfide, which comprises a reaction kettle, a cyclone separator arranged at the top of the reaction kettle, a washing kettle connected with the cyclone separator, a stirring turntable arranged at the bottom of the washing kettle, an absorption kettle connected with the top of the washing kettle, and a desorption kettle connected with the bottom of the absorption kettle, a spiral stirring paddle is arranged in the desorption kettle, the top of the desorption kettle is sequentially connected with a condenser, an adsorption tower, a compressor and a rectifying tower, a plurality of adsorption layers are arranged in the adsorption tower, and a pressure pump is arranged at the upper part of the rectifying tower. The utility model provides a device which is modularized, continuous and high in automation degree. Efficient production of hydrogen sulfide is achieved, purification of hydrogen sulfide is completed on line, high-purity hydrogen sulfide is directly produced, and production and use are achieved.

The invention discloses a device and method for purifying high-purity hydrogen sulfide gas, and relates to the technical field of purification, and the device comprises a purification mechanism. According to the device for purifying the high-purity hydrogen sulfide gas, through the design of the purification mechanism, gas enters the purification shell from the gas inlet pipe, the gas is sprayed through the spraying mechanism, liquid and the gas are promoted to make contact on a filler layer, the gas-liquid contact area is increased, the liquid forms a liquid film on the surface of filler, and the gas conducts mass transfer on the surface of the liquid film; the gas-liquid contact area is increased, the absorption efficiency is improved, the pollution of gas to the external environment is reduced, other gas moves towards the top of the purification shell, liquid drops and entrainment entrained in the gas are removed through the demister, the sprayed liquid precipitates at the bottom of the purification shell, and part of the liquid enters the water conveying pipe from the water pump box and is finally sprayed out of the spraying mechanism. Therefore, the effect of water circulation is achieved, resource waste is reduced, part of liquid is discharged from one side of the sewage valve, and follow-up treatment is facilitated.

The disclosure relates to methods of irradiating a gas containing hydrogen sulfide (H2S) with high energy light to photolytically cleave some of the hydrogen sulfide in the gas to form sulfur-containing reactive species. The sulfur-containing reactive species act as autocatalysts that react with some of the remaining hydrogen sulfide in the gas to generate hydrogen gas and one or more sulfur-containing products. The methods remove hydrogen sulfide from the gas and produce hydrogen gas. The methods can be implemented in a component of a hydrocarbon producing well (e.g., a wellhead, a flow line, a production casing, a production tubing), a component used to transport the gas mixture produced by the well (e.g., a transportation pipeline), a gas treatment system (e.g., a tail gas treatment system), a borehole and / or an underground formation.

The present application relates to a kind of high acid, atmospheric, circulating leaching process of nickel, comprising the following steps: (1) nickel is ground and treated, and fine grinding nickel is obtained;(2) fine grinding nickel is leached by concentrated sulfuric acid, and respectively obtain hydrogen sulfide gas and leaching slurry;(3) leaching slurry is filtered and separated by leaching filter press, and respectively obtain filter residue and leaching liquid after filter press;Leaching liquid after filter press is treated by evaporation concentrator, and respectively obtain condensed water A and concentrated mother liquor;(4) filter residue enters slurry dissolving tank and is dissolved, and slurry filter press is filtered, and respectively obtain filter copper residue and iron, nickel, cobalt containing sulfate dissolved solution;(5) iron, nickel, cobalt containing sulfate dissolved solution is reacted with medium pressure steam and oxygen to remove iron, and obtain iron-removed slurry;(6) iron-removed slurry is separated by sedimentation, washed and evaporated, and respectively obtain hematite tailings, nickel sulfate crystal and high acid mother liquor.The present application has low cost, short process, and can realize the separation of main metal nickel and impurity metal copper and iron.

The invention relates to the technical field of resource utilization, in particular to a biological utilization method based on molten iron desulfurization slag, which comprises the following preparation steps: S1, crushing, magnetically separating and sieving the molten iron desulfurization slag to obtain desulfurization slag powder; s2, mixing the desulfurization slag powder with a sulfuric acid solution, adjusting the pH value to 2-4, reacting to obtain slurry and hydrogen sulfide, and filtering the slurry to obtain filtrate and acid leaching slag containing silicon dioxide; s3, combining hydrogen sulfide with sulfur-oxidizing bacteria loaded in the ceramic filler, and carrying out biological oxidation to obtain sulfuric acid; and S4, adding an alkaline reagent into the filtrate, adjusting the pH value of the filtrate to 4.5-5.5, and filtering to obtain aluminum ion-containing precipitate and filtrate. According to the method, the industrially produced molten iron desulfurization slag is used as a raw material, the sulfuric acid is produced in a biological oxidation manner, besides the main product sulfuric acid, by-products such as acid leaching slag containing silicon dioxide, aluminum hydroxide and recycled iron are separated, the economic value of the whole process is improved, and the problem of land resource occupation is relieved.

The present disclosure relates to the technical field of desulfurization, and discloses a composite material and the use thereof in desulfurization. The composite material contains activated carbon, alkali metal oxides, silicon oxides, iron oxides, and rare earth element oxides, wherein the weight ratio between the activated carbon, iron oxides and rare earth element oxides is 100 : (0.5-5) : (1-10), and the composite material satisfies a certain relationship. Also disclosed in the present disclosure is the use of the composite material in desulfurization. The composite material of the present disclosure, as an adsorbent, has a higher sulfur breakthrough capacity and desulfurization rate.

A process for producing a hydrogen-containing gas stream containing hydrogen sulfide and simultaneously producing a low-sulfur carbonaceous material comprises the steps of: (i) providing a hydrocarbon feed gas stream containing sulfur-containing compounds; (ii) supplying carbonaceous particles to a reactor and subjecting the feed gas stream to pyrolysis in the reactor on a moving bed of carbonaceous particles; (iii) recovering a hydrogen-containing gas stream comprising hydrogen sulfide; and (iv) recovering the low sulfur carbonaceous particles. The sulfur is ultimately present in the form of hydrogen sulfide that is harmless to, or purposefully used for, a selected downstream application or can be easily removed from the hydrogen stream. A desulfurization step is not required prior to thermocatalytic conversion of the sulfur-containing hydrocarbon feedstock.

The utility model belongs to the technical field of gas purification, and particularly relates to a hydrogen sulfide purification system. The hydrogen sulfide purification system comprises multiple stages of pre-absorption towers connected in series and multiple stages of absorption towers connected with the multiple stages of pre-absorption towers, and a gas outlet of the last stage of pre-absorption tower of the multiple stages of pre-absorption towers is connected with a gas inlet of the first stage of absorption tower of the multiple stages of absorption towers through a pipeline. A valve is arranged on the pipeline; and booster pumps are arranged in front of the gas inlet and the liquid inlet of the first pre-absorption tower. The hydrogen sulfide purification system disclosed by the utility model consists of the multi-stage pre-absorption tower and the multi-stage absorption tower which are connected in series, and is low in equipment investment, simple to operate and good in purification effect.

This invention discloses a desulfurization and sulfur production process and system, specifically relating to the field of flue gas desulfurization technology. It combines sodium hydroxide desulfurization with bipolar membrane electrodialysis technology and sodium sulfide hydrochloric acid acidification reaction to achieve high-value utilization of desulfurization products and recycling of sodium. Simultaneously, by self-sufficiently preparing SO2 raw materials required for the Claus reaction through anaerobic combustion of H2S, this invention achieves high-purity preparation of H2S (without CO2 impurities), self-sufficiency of hydrochloric acid (HCl), complete internal recycling of chloride ions, a perfect closed-loop cycle of sodium, and 100% resource recovery of sulfur.