204 results about "Solid reaction" patented technology

The present invention relates to a method for purification and separation of solid-state carbon-containing material generated from electrolysis of a molten lithium carbonate elec- trolyte and recovery of lithium carbonate The method comprises obtaining a solid reaction product formed from electrolysis of a molten lithium carbonate salt electrolyte. The solid reaction product is mixed with an aqueous source and carbon dioxide is introduced at a predetermined first pressure to produce carbon dioxide treated aqueous reaction product mixture. The temperature and pressure of the carbon dioxide treated aqueous reaction product mixture is controlled to produce solid-state carbon material and an aqueous solu- tion rich in lithium salts. The solid-state carbon is separated from the aqueous solution rich in lithium salts. Carbon dioxide stream, precipitated lithium carbonate and an aqueous solution poor in lithium salts are generated by controlling the pressure and temperature of the aqueous solution rich in lithium salts. The precipitated lithium carbonate is separated from the aqueous solution poor in lithium salts. The method further comprises one or more of: recycling the recovered precipitated lithium carbonate as a feed source for the molten lithium carbonate salt electrolyte; and / or recycling the recovered aqueous solution poor in lithium salts as at least a portion of the aqueous source.

The invention discloses a method for preparing coal and calcined kaolin through coal gangue grinding and grading-acid leaching-suspension calcination, and belongs to the technical field of coal gangue beneficiation. According to the method disclosed by the invention, the three stages of ore grinding flotation, acid leaching purification and fine grinding calcination complement each other, so that fine-grained calcined kaolin of which the content of-7 microns is greater than or equal to 90% and the whiteness is greater than or equal to 90% and ultrafine-grained calcined kaolin of which the content of-2 microns is greater than or equal to 90% and the whiteness is greater than or equal to 90% are prepared. According to the method, effective separation of coarse coal, leaching and purification of impurity iron elements and calcination and purification of fine-grained kaolin are realized through step grinding and step separation; the gas-solid reaction degree is improved and sintering is avoided by utilizing the dispersion and suspension characteristics of fine-particle materials; the dehydroxylation and decarburization reactions can be carried out completely by calcining fine materials and precisely controlling the temperature, so that the whiteness of the calcined kaolin product is remarkably improved. According to the method, the adaptability to coal gangue raw ore is improved, and meanwhile, a new thought is provided for efficiently preparing a calcined kaolin product from the coal gangue and cooperatively recycling coal resources.

The invention discloses a novel synthesis method of 4-formyl benzoic acid succinimido ester, which comprises the following steps: by taking p-formylbenzoic acid, NHS and EDAC as raw materials and dichloromethane as a solvent, adding a catalyst for reaction, and removing the solvent in vacuum to obtain a solid reaction product; and then the solid product is further subjected to the steps of dissolving, drying, vacuum solvent removal and the like to obtain a final product. By optimizing the synthesis conditions of the 4-formyl succinimidyl benzoate, the subsequent separation process is simplified, and the operation is simpler and more convenient; by adopting the catalyst, the yield is greatly improved and can reach 96% or above at most. The synthesis method disclosed by the invention is high in yield, mild in reaction condition and simple and convenient to operate, and can meet the requirements of large-scale industrial production.

The invention relates to a method and a device for continuously producing sulfuryl fluoride. The method is a gas-solid reaction among reaction raw materials, does not need to use a solvent and a catalyst, is high in production efficiency, short in production period, high in sulfuryl fluoride yield and low in production cost, and can realize continuous production.

The invention relates to the technical field of new materials, in particular to a polymer, an ion exchange membrane and a preparation method and application thereof. The polymer is a compound shown in a general formula I, r is; n is the content of non-quaternized piperidine in the main chain, and n is equal to 0-1; z = n / 2. The end-capping reagent is introduced by adopting a gas-solid reaction method, that is, the membrane reacts with the vaporized end-capping reagent. The method has a positioning effect on a polymer molecular chain, so that a static polymer chain and a dynamic end-capping reagent are in a positioning and fixed-point reaction when the end-capping reaction occurs, and self-crosslinking caused by high movement of the polymer chain is prevented. In addition, the space structure of a triazine network cross-linking site is regulated and controlled by optimizing an end-capping reagent, and the purpose of improving the stability and OH <-> conductivity of the thin film at the same time is achieved.

The application relates to a gas-solid reaction rotary furnace. The gas-solid reaction rotary furnace comprises a support frame, a base, a frame rotatably connected to the base, a first driver for driving the frame to rotate, a rotary furnace pipe arranged in the frame, the rotary furnace pipe comprising a powder inlet and outlet end and a gas inlet and outlet end, and a gas assembly arranged at the gas inlet and outlet end of the rotary furnace pipe, wherein when the gas assembly supplies gas to the rotary furnace pipe, the rotary furnace pipe can be moved to a state where the gas inlet and outlet end is higher than the powder inlet and outlet end. During operation of the gas-solid reaction rotary furnace, the rotary furnace pipe is kept in an inclined rotating state, the loading capacity of the rotary furnace pipe is increased, the production capacity of a single furnace is increased, the energy consumption of unit weight of material is reduced, and the processing time and cost are reduced.

The present invention relates to a method for preparing silicon monoxide nanopowder, and belongs to the technical field of non-metallic powder material preparation. The present invention uses SiO2 aerogel powder with a three-dimensional continuous structure surface as raw material, adsorbs hydrogen molecules on the surface of the powdered SiO2 aerogel, and axially feeds an argon-excited inductively coupled plasma torch. The hydrogen molecules are excited by the argon plasma torch to form a highly active hydrogen-rich plasma, which undergoes a reduction reaction with the SiO2 aerogel powder having the characteristics of high specific surface area and high porosity. The generated silicon monoxide vapor is quenched by argon downstream of the reaction device to obtain highly dispersible silicon monoxide nanopowder. This method overcomes the defects of the traditional solid-solid reaction method for preparing silicon monoxide, which has a slow reaction rate and low raw material conversion rate, and at the same time solves the safety problems existing in the traditional method of producing silicon monoxide by hydrogen reduction, thereby greatly improving production efficiency and safety.

The invention relates to an efficient gas-solid reaction process and an integrated industrial system, and belongs to the technical field of gas-solid reaction in chemical production. The process flow comprises the following steps: crushing and drying coke by a pulverizing unit, preheating the coke and sulfur steam to be greater than or equal to 550 DEG C, and jointly entering a gas-solid reaction unit; and the product enters a gas-solid separation unit, is subjected to two-stage gas-solid separation at a high temperature of 450-680 DEG C and a low temperature of less than or equal to 200 DEG C, and then is The integrated industrial system based on the efficient gas-solid reaction process is applied to carbon disulfide production through a coke method, the problems of external heat supply and byproduct generation control in the reaction process of coke and sulfur are solved, and the system is simple in process chain, easy and convenient to operate, compact in structure and suitable for continuous and closed carbon disulfide production requirements through the coke method.

The invention discloses a material reactor, a material reaction system, a method for decomposing a self-oxidation reduction precursor and application. The material reactor comprises a dividing piece and a reaction cylinder, adjusting the rotation of the reaction cylinder; the reaction cylinder is provided with a reaction cavity along the length direction; the dividing piece is placed in the reaction cavity; the dividing piece is provided with at least three dividing plates; one ends of the plurality of sub-plates are connected and are distributed in a surrounding manner by taking the connected position as the center; the other ends of the partial split plates are in contact with the inner wall of the reaction cavity; the material reaction system comprises a rack, a heating device, a feeding device, a discharging device and a material reaction system, according to the scheme, multiple synergistic effects of preventing adhesion, improving heat transfer and accelerating gas-solid reaction can be realized, and the problem of waste caused by the fact that gas decomposed by raw materials does not participate in synthesis and is directly discharged in a production process is solved.

The invention relates to the technical field of rare earth secondary resource recovery, in particular to a neodymium iron boron waste recovery method. The method comprises the following steps: firstly, grinding the neodymium iron boron waste into fine granularity, and spraying into a specially designed flash reaction furnace body through a nozzle by virtue of carrier gas; meanwhile, sodium chlorate powder is continuously added into a pyrolysis area in the furnace, so that the sodium chlorate powder is instantly decomposed at a certain temperature, and high-activity gas is generated; the sprayed waste particles are in a suspended state in the reaction tower and are subjected to instantaneous gas-solid reaction with high-temperature active gas, rare earth elements are quickly oxidized and chlorinated and are converted into soluble rare earth oxychloride, and iron is mainly converted into FeO which is easy to magnetically separate. And carrying out cyclone dust collection and quenching on the reacted material to obtain a roasted product, recovering rare earth through water leaching, and recovering iron through magnetic separation. According to the invention, selective oxidation is completed at low temperature in a short time (second level), and the method has the outstanding advantages of high efficiency, low energy consumption and high recovery rate.

The present application relates to a method for reducing the content of sulfur in aluminum fluoride, which comprises the following steps: uniformly mixing crude aluminum fluoride powder containing sulfate impurities with ammonium hydrogen fluoride powder to obtain a mixture; placing the mixture in a reactor and performing programmed temperature calcination under a protective atmosphere; discharging the sulfur and fluorine-containing volatile gas generated by calcination after treatment by an absorption system; cooling the calcined material to room temperature; washing the cooled material with water or blowing inert gas to remove residual ammonium salt or dust, and then drying to obtain a low-sulfur aluminum fluoride product. The in-situ HF generated by the decomposition of NH4HF2 is used for gas-solid reaction, which can effectively attack and convert stable sulfate impurities existing in various forms, has high desulfurization efficiency and is deep and thorough; the reaction conditions are mild, the main phase of the product is stable, the process flow is simple, and the energy consumption is low.

The invention discloses flaky alumina and a preparation method thereof, the flaky alumina is in a square sheet shape and has a single crystal structure, the grain size of the flaky alumina is 300-1300 nm, and the grain thickness is less than or equal to 150 nm. The preparation method comprises the following steps: placing roasted SB powder and a quaternary ammonium base solution in a pressure container in a solid-liquid two-phase separation manner, carrying out a gas-solid reaction under certain heat treatment conditions, and drying and roasting the reacted solid powder to obtain the flaky aluminum oxide. The flaky aluminum oxide is regular in structure and flat and smooth in surface, can be used as a polishing material, a coating, a catalysis material and an adsorption material, and is simple in preparation process, easy in raw material obtaining and easy in industrial production.

The application discloses a kind of based on heat trigger solid-liquid reaction's goaf spontaneous combustion initiative inerting device and method, belong to coal mine fire prevention technical field, first based on experimental data, goaf beam tube monitoring and numerical simulation determine goaf high temperature prevention area, under the influence of setting safety margin and considering the maximum thickness of residual coal determine the starting temperature of adaptive inerting device, then according to goaf residual coal thickness, porosity, oxygen concentration field and high temperature prevention area area calculate out initiative inerting device size and reagent filling amount, finally combine the effective coverage area of single device and honeycomb grid generation algorithm, design initiative inerting device dynamic pre-buried point, and pre-bury initiative inerting device in coal mining face, when device reaches the high temperature protection area of goaf deep, temperature sensing guide column paraffin melt, aluminum sulfate solution in liquid reagent storage tank flows into solid reaction bin and sodium bicarbonate reaction along guide column, generate a large amount of CO2 from exhaust port, rapidly reduce local oxygen concentration, eliminate goaf spontaneous combustion hazard.The core innovation of the application is to abandon the traditional passive prevention mode relying on gas diffusion, and instead adopt the initiative control mechanism of "temperature sensing trigger-in-situ reaction-directional release", so that CO2 directly acts on the high temperature area through the directional exhaust port, rapidly reduces the local oxygen concentration, cuts off the necessary condition of coal spontaneous combustion from the source, realizes the initiative identification and accurate inerting of goaf high temperature area, and ensures the safety production of coal mining face.

The invention provides a cylindrical fixed bed reactor of a thermochemical energy storage gas-solid reaction system and a testing method thereof, and belongs to the field of thermochemical energy storage. According to the invention, the heat storage and release cycle experiment can be carried out for different thermochemical gas-solid reaction systems, especially the heat storage and release process of a hydroxide system and a hydrated salt system. Openings at two ends of a reaction cavity are respectively connected with a top seal head and a bottom seal head, the top seal head is provided with an air inlet, the bottom seal head is provided with an air outlet, and stainless steel sintered plates are respectively arranged between the air inlet and the reaction cavity and between the air outlet and the reaction cavity; the heat exchange cavity is embedded in the periphery of the reaction cavity, a cooling water coil and a heating pipe are arranged in the heat exchange cavity, an inlet and an outlet of the cooling water coil are connected with a cooling water coil inlet and a cooling water coil outlet in the heat exchange cavity respectively, and positive and negative binding posts of the heating pipe extend out of the heat exchange cavity. According to the invention, heat storage and release performance research under various working conditions of variable temperature, variable pressure and variable flow can be carried out.

A process for converting plastic materials into pyrolytic oils, wherein: plastic materials are continuously fed into a preheating reactor to be mixed and preheated at a preheating temperature to obtain a pasty mixture; the pasty mixture is continuously transferred into a pyrolysis reactor to be heated at a pyrolysis temperature, under an anaerobic or inert atmosphere, to be converted into synthesis gases and a solid reaction product; the synthesis gases, containing condensable gases and uncondensable gases, are recovered on a first outlet located above the permeable bed, and the solid reaction product is recovered on a second outlet located below the permeable bed; the condensable gases of the synthesis gases are condensed into pyrolytic oils which are recovered.

The utility model discloses a circulating device for volatile liquid and non-volatile liquid or soluble solid solution, and belongs to the technical field of chemical reaction equipment. The device comprises a gas collection container, a liquid-solid reaction operation container and a magnetic stirrer, a pressure release valve is arranged at the top of a container body, and a scale feeding pipe extending into the bottom of the container is arranged; the liquid-solid reaction operation container is a round flask, the lower part of the flask body is connected with a sample receiving pipeline, a reaction monitoring sample receiving switch is arranged on the pipeline, and the bottom of the flask body is also connected with a graduated shunt tube and is provided with a valve; the liquid-solid reaction operation container is placed on the magnetic stirrer, and the gas collection container and the liquid-solid reaction operation container are connected through a diaphragm pump pipeline and a reflux pipeline, so that gas of volatile liquid is pumped into the liquid-solid reaction bottle and enters the gas collection container again through the reflux pipeline under the action of pressure, and recycling of the liquid is realized. The continuous reaction is ensured. The overall design of the equipment is simple and easy to operate, and the equipment has good corrosion resistance and safety.

Reactor configurations may include one or more staged inlets and / or one or more staged outlets for gaseous and solid feedstocks. In one embodiment of the present disclosure, a reactor design for gas-solid reaction with one or more additional outlet for gas and / or solid phase is provided. In yet another embodiment, the design for a gas-solid reactor with one side inlet and two outlets for gas phase is described. In one embodiment, a reactor design with pairs of inlet and outlet for both gas and solid phase is provided. In another embodiment, a reactor design with one or more side inlets but only one outlet for gas phase is provided. In yet another embodiment, a reactor design with two inlets at the top / bottom of reactor and two side outlets for gaseous phase is described. In yet another embodiment, a reactor design with one or more side inlets and outlets for both gas and solid phases is provided.

The invention belongs to the technical field of inorganic salt preparation, and discloses a method for preparing anhydrous magnesium chloride by dehydrating magnesium chloride hexahydrate, which comprises the following steps: by taking magnesium chloride hexahydrate as a raw material, carrying out preliminary dehydration to obtain low-water magnesium chloride, mixing the low-water magnesium chloride with fluid ammonia to carry out solid-liquid reaction, then carrying out solid-liquid separation and reduced pressure treatment to obtain a solid phase, and further performing high-temperature deamination to obtain anhydrous magnesium chloride. According to the method disclosed by the invention, solid-liquid reaction is directly carried out on the fluid ammonia and the low-water magnesium chloride, so that the use of a large amount of organic solvents and complicated operation steps in a traditional ammonia-gas-based alcohol ammonia method are avoided. Compared with a gas-solid reaction, the solid-liquid reaction has the advantages of being high in reaction speed, high in yield and the like, separation of ammonia and water can be achieved only through decompression treatment, and therefore recycling of ammonia is easy to achieve. Meanwhile, the method avoids corrosion of acid gas to equipment in a gas protection heating method taking hydrogen chloride as protective gas, and large-scale and rapid dehydration of magnesium chloride hexahydrate can be realized.

This invention discloses a spouted bed reactor and method for selective carbon deposition on the outer surface of micron-sized powders, belonging to the fields of gas-solid reaction engineering and chemical vapor deposition technology. The reactor includes a sealed reaction chamber, within which a gas distribution zone, a spouted circulation zone, a main reaction zone, and a top buffer zone are sequentially arranged. A porous distribution plate and a carrier gas inlet are provided at the bottom, and a central spouted gas inlet can be provided to form a particle circulation path with a central upward flow and peripheral recirculation. A reactive gas introduction structure is provided in the main reaction zone to introduce reactive gas in the middle of the particle circulation path. An internal filter assembly can be installed at the top of the chamber to achieve gas-solid separation. Through the partitioned introduction of carrier gas at the bottom and reactive gas in the middle, a spatially separated gas-solid contact structure is formed within the reaction chamber.

A catalyst component for the polymerization of olefins obtained by a process comprising: (a) reacting in an inert hydrocarbon suspension medium a Mg(OR1)(OR2) compound, in which R1 and R2 are identical or different and are each an alkyl radical having 1 to 10 carbon atoms, with a tetravalent transition metal compound having at least a Metal-halogen bond, used in amounts such that the molar ratio metal / Mg is from 0.05 to 5, thereby obtaining a solid reaction product dispersed in a hydrocarbon slurry and (b) contacting the product obtained in (a) with ethylaluminum dichloride.

The invention discloses a method for synthesizing hydrogen cyanide from a carbon-containing solid and ammonia gas, and belongs to the technical field of hydrogen cyanide production. The method comprises the following steps: contacting ammonia gas with a carbon-containing solid heated to a reaction temperature, and carrying out a gas-solid reaction to generate a high-temperature gas containing hydrogen cyanide; according to the invention, the technical route that the existing hydrogen cyanide production technology mainly depends on a gaseous hydrocarbon carbon source, a noble metal catalyst and external combustion heat supply is changed, and the problems of limited raw material sources, easiness in catalyst deactivation, slow process start-stop response and the like are solved.

The invention relates to the technical field of hydrogen storage material preparation, in particular to a Na-Al-H4 hydrogen storage material and a preparation method and application thereof. The invention provides a preparation method of a Na-Al-H4 hydrogen storage material, which comprises the following steps: in an inert atmosphere, smelting an aluminum elementary substance and a metal catalyst to obtain an aluminum alloy ingot, and then melting and rapidly quenching the aluminum alloy ingot to obtain an aluminum alloy strip; and carrying out ball milling and hydrogenation on the aluminum alloy belt and sodium hydride in a hydrogen-containing reducing atmosphere to obtain the Na-Al-H4 hydrogen storage material. An aluminum alloy ingot is obtained through smelting, then the alloy ingot is subjected to melting and rapid quenching to obtain an aluminum alloy belt, and the aluminum alloy belt and sodium hydride are subjected to ball-milling hydrogenation in the form of the aluminum alloy belt to obtain the Na-Al-H4 hydrogen storage material. The whole process adopts a solid-solid reaction preparation method, the raw materials are simple and easy to obtain, the use of an organic solvent is avoided in the process, the operation is simple, and the method is suitable for large-scale factory preparation.

The invention relates to a thermochemical energy storage reactor for carrying out a gas-solid reaction or a corresponding reverse reaction. The thermochemical energy storage reactor comprises a reaction volume (11) in which a solid energy storage material (30) and a gaseous reaction medium (32) form a mixture and react with each other, a particle inlet (15) for introducing the energy storage material (30), a particle outlet (16) for removing the energy storage material (30), a gas inlet (17) for introducing the reaction medium (32), a gas outlet (18) for removing the reaction medium (32), and a jacket (19) which at least partially surrounds the reaction volume (11) and is adapted to carry out heat transfer between a heat transfer fluid flowing in the jacket (19) and the mixture of energy storage material (30) and reaction medium (32) located in the reaction volume (11).The reaction volume (11) is mixed by at least one stirring element (20). The stirring element (20) is adapted to mix the energy storage material (30) and the reaction medium (32) by stirring around a stirring axis (22) which is arranged essentially parallel to a direction of gravity (90).

To provide a method for efficiently regenerating wastewater solutions of sodium hydroxide. [Solution] A method for regenerating a waste sodium hydroxide aqueous solution containing aluminum, comprising the steps of: mixing and reacting an aqueous slurry containing a calcium compound with the waste sodium hydroxide aqueous solution to form a reaction solution containing a supernatant liquid and a solid reaction residue; and subjecting the reaction solution to a solid-liquid separation treatment to remove the reaction residue, thereby recovering the supernatant liquid as a regenerated sodium hydroxide aqueous solution.

The invention discloses a goaf spontaneous combustion active inerting device and method based on thermal trigger type solid-liquid reaction, and belongs to the technical field of coal mine fire prevention and extinguishing. The method comprises the following steps: determining the starting temperature of an adaptive active inerting device under the conditions of setting a safety margin and considering the influence of the maximum thickness of residual coal, and then calculating the size of the active inerting device and the reagent filling amount according to the thickness of residual coal in a goaf, the porosity, an oxygen concentration field and the area of a high-temperature control region; finally, combining the effective coverage area of a single device and a honeycomb grid generation algorithm, designing a dynamic pre-embedded point location of the active inerting device, pre-embedding the active inerting device on a coal face, and when the device reaches a high-temperature protection area in the deep part of a goaf, melting paraffin in the temperature-sensing flow guide column when the device is heated, so that the temperature-sensing flow guide column reaches the high-temperature protection area in the deep part of the goaf. An aluminum sulfate solution in the liquid reagent storage tank flows into the solid reaction bin along the flow guide column to react with sodium bicarbonate, a large amount of CO2 is generated and discharged from the exhaust port, the local oxygen concentration is rapidly reduced, and the natural ignition hidden danger of the goaf is eliminated. The core innovation of the invention lies in that a traditional passive prevention and control mode depending on gas diffusion is abandoned, and an active prevention and control mechanism of'temperature sensing trigger-in-situ reaction-directional release 'is adopted, so that CO2 directly acts on a high-temperature area through a directional exhaust port, the local oxygen concentration is quickly reduced, the necessary condition of coal spontaneous combustion is cut off from the source, and the coal spontaneous combustion is realized. Active recognition and precise inerting of the high-temperature area of the goaf are achieved, and safe production of a coal mining working face is guaranteed.

The utility model relates to the technical field of reaction kettles, and discloses a novel liquid-solid reaction kettle with a liquid pumping device, which comprises a processing tank body, the outer side of the processing tank body is fixedly connected with a steam inlet, the outer side of the steam inlet is rotatably connected with a rotating column, the inside of the rotating column is fixedly connected with a sealing shell, and the sealing shell is fixedly connected with a liquid pumping device. And a sealing gasket is slidably connected to the interior of the sealing shell, a plurality of first limiting blocks are fixedly connected to the outer side of the rotating column, a sliding column is slidably connected to the outer side of the rotating column, three supports are fixedly connected to the bottom of the processing tank body, and fixing assemblies are slidably connected to the interiors of the supports. According to the utility model, the time and labor cost are greatly saved, the working efficiency is improved, and when the pipeline needs to be frequently replaced or overhauled in industrial production, the pipeline can be quickly disassembled and reinstalled, and the downtime of equipment is reduced.

The invention discloses an internal rotation type anti-slagging solid waste efficient combustion / carbonization device and method. The device comprises a feeding system, an air supply system, a combustion / carbonization system and a rotating shaft. The invention provides an internal rotation type rotating shaft with shoveling plates in a furnace, which can effectively prevent solid from slagging in a high-temperature environment. And a gas channel is formed in the rotating shaft, so that contact and mixing of the solid waste and air are further promoted, and meanwhile, the rotating shaft is cooled. Mixing in the gas-solid reaction process is enhanced, growth of ash in the thermochemical process is destroyed, the purposes of improving the waste combustion / carbonization efficiency and preventing slag bonding are achieved, meanwhile, cooling air is introduced into the low-speed rotary stirrer, and contact between fuel and air is promoted while high-temperature cooling of the low-speed rotary stirrer is guaranteed.

The application discloses a method and system for preparing sodium sulfide by reducing sodium sulfate, and belongs to the field of inorganic chemical products. The method comprises the following steps: mixing fuel and air to obtain high-temperature flue gas; obtaining high-temperature reducing gas by heat exchange of the high-temperature flue gas and the heating reducing gas; under the indirect heating of the high-temperature flue gas, preheating sodium sulfate raw materials and mixing the high-temperature reducing gas, and completing the gas-solid reaction to generate sodium sulfide in a dilute phase conveying state under the carrying of the high-temperature reducing gas; gradually preheating the powdered sodium sulfate raw materials by the high-temperature flue gas to obtain preheated sodium sulfate raw materials; carrying out gas-solid separation on the reducing waste gas carrying the sodium sulfide; gradually cooling the high-temperature sodium sulfide obtained by the gas-solid separation by direct heat exchange with low-temperature inert gas to output the sodium sulfide product, and obtaining the heating inert gas. The application has the advantages of short reduction reaction time, high reaction efficiency, high thermal efficiency, simple preparation process, high purity of the obtained sodium sulfide, and high product value.

The invention discloses a method for continuously preparing lithium sulfide through gas-solid reaction, which comprises the following steps of: adding alkaline lithium-containing compound coarse powder into a continuous jet mill system for refining to prepare alkaline lithium-containing compound powder; the method comprises the following steps: heating high-purity hydrogen sulfide gas produced industrially, and introducing the heated high-purity hydrogen sulfide gas into a primary screw cavity; the alkaline lithium-containing compound powder reacts with high-temperature hydrogen sulfide gas in the first-stage screw cavity to generate lithium sulfide coarse powder; the second-stage screw cavity cools the powder and the gas, and the lithium sulfide powder which does not meet the requirement is conveyed to a feeding port of the first-stage screw cavity to be circularly treated until the lithium sulfide powder meets the requirement; compared with the prior art, continuous operation can be achieved, the cost of raw materials is low, and the capacity of ten thousand tons can be achieved; gas is self-circulated, and the energy consumption is reduced by more than or equal to No organic solvent is needed for purification, and the process is closed and environment-friendly.

The invention provides a preparation device and a preparation method of a perovskite thin film and a solar cell, the preparation device comprises a carrier gas module for providing carrier gas, an organic ammonium salt source module and a reaction chamber, the organic ammonium salt source module comprises a steam preparation unit and a steam mixing unit, a gas inlet of the steam preparation unit is communicated with the carrier gas module, and a gas outlet of the steam mixing unit is communicated with the reaction chamber; the air outlet is communicated with the air inlet of the steam mixing unit; the reaction cavity is connected with a gas outlet pipeline of the steam mixing unit and is used for providing a reaction environment for a gas-solid reaction between the perovskite inorganic precursor and organic ammonium salt steam; wherein the steam preparation unit is used for converting solid organic ammonium salt loaded in the steam preparation unit into organic ammonium salt steam, mixing carrier gas with the organic ammonium salt steam to form mixed gas, and introducing the mixed gas into the steam mixing unit; the steam mixing unit is used for homogenizing the mixed gas and conveying the mixed gas to the reaction cavity. The preparation device can be used for preparing the high-quality perovskite thin film with accurate stoichiometric ratio and few defects.