51results about How to "Reduce processing energy consumption" patented technology

The present application relates to a kind of compositions and applications comprising polyamide.The composition includes polyamide and sheet structure mineral powder, wherein, with 100 mass parts of polyamide, sheet structure mineral powder in the composition is 0.1-10 mass parts.The polyamide material in the present application has lightweight, easy processing, has cost advantage, compared with steel material has obvious advantage.Sheet structure mineral powder is added in polyamide material by intercalation modification, further improve the barrier property of product, effectively avoid "hydrogen embrittlement" risk, with "hydrogen embrittlement" resistance, low hydrogen permeability, and suitable for the temperature range of application, it has high toughness in low temperature environment condition, the performance of polyamide material reaches a good balance, and the comprehensive performance is better.Suitable for hydrogen pipeline, hydrogen storage bottle etc., has advantage in hydrogen energy automobile and other application scenarios.

This invention discloses a method and system for treating landfill leachate stock, belonging to the field of wastewater treatment technology. The method includes the following steps: first, adding an appropriate amount of acid to the landfill leachate and stirring until homogeneous to obtain an acidic solution with a pH value below 1.5; then, adding silicate cement to the acidic solution in one go or in small amounts multiple times, mixing thoroughly, and allowing it to settle until solids precipitate before discharging the liquid to the external environment or transporting it to the next process. The total amount of silicate cement added is 6%-10% of the mass of the acidic solution. This method can simultaneously treat TP, TN, and NH3 in landfill leachate. 3 Removal of -N and COD, TP, TN, NH 3 The removal rate of nitrogen (-N) can reach over 75%, and the COD removal rate can reach over 30%. The levels of recalcitrant organic macromolecules and benzene ring compounds are significantly reduced. The organic matter in the water sample is reduced, and the molecular structures are simpler and smaller, which is beneficial for biological decomposition and utilization. The system has a simple structure, is easy to use, and significantly reduces water treatment costs.

The invention discloses a wheel forging and rolling composite forming process based on deformation distribution and a structure regulation and control method, and belongs to the technical field of wheel manufacturing. The method comprises the steps that a composite forming path of pre-forging, finish forging and finish rolling is adopted, the deformation amount of each procedure is scientifically distributed, pre-forging accounts for 70%-80%, finish forging accounts for 15%-20%, and finish rolling accounts for 5%-10%, so that forming precision and microstructure control is achieved. Meanwhile, quantitative prediction is carried out on microstructure evolution in the whole forming process by constructing a multi-scale digital simulation platform integrating a material constitutive model, a microstructure evolution model and a cellular automaton. And based on a prediction result, active and accurate regulation and control of microstructures of different parts of the wheel are realized through virtual iteration optimization of key process parameters such as temperature, deformation and strain rate, and finally, the complex-structure wheel with high dimensional precision, uniform and fine structure and excellent comprehensive performance is obtained. According to the wheel shape-character collaborative manufacturing method, shape-character collaborative manufacturing of the wheel is achieved, and the scientificity and efficiency of process design are improved.

The present application relates to the field of coking, synthetic ammonia and the like containing ammonia wastewater treatment, and discloses a novel ammonia evaporation energy-saving process system, a primary ammonia evaporation tower, an intermediate pressurizing pump set, a water flow regulating device, a secondary ammonia evaporation device, a flash tank, a steam ejector, a pressurizing pump set and a control unit. After the ammonia-containing wastewater is preliminarily treated by the primary ammonia evaporation tower, it is delivered to the secondary ammonia evaporation device by the pressurizing pump, and introduced into new steam for secondary ammonia evaporation. After the secondary ammonia evaporation, the wastewater flows into the flash tank to produce flash steam by cooling and pressure reduction, and the flash steam is pressurized by mixing with the new steam through the steam ejector, and then returns to the primary ammonia evaporation tower or the secondary ammonia evaporation device, so that the steam is recycled multiple times. The system can effectively reduce the new steam consumption by 35-45% under the premise of ensuring the stability of the ammonia nitrogen index of the effluent, improve the energy utilization rate, reduce carbon emissions, and is suitable for direct ammonia evaporation and indirect ammonia evaporation systems.

The application discloses a method for purifying 2',4'-dichloro-5'-(4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl)methyl sulfonaniline (i.e. a crystal form of mesosulfuron) and a new crystal form obtained by the method; the method for purifying mesosulfuron crystal form of the application adopts an ester organic solvent to treat a product wet material obtained by the prior art, then the obtained product is subjected to stage heating and cooling operation, and the target crystal form is obtained by crystallization. The crystal form obtained by the application has low toluene residue, high purity, simple process, low cost and is particularly suitable for subsequent preparation processing.

This invention discloses an environmentally friendly plasticizer using modified lignin as a carrier, a rubber composition, and a method for preparing the same, relating to the field of rubber processing technology. The environmentally friendly plasticizer using modified lignin as a carrier, by weight, comprises the following components: 50 parts modified lignin, 25 parts plasticizing active ingredient, 8 parts dispersant, 5 parts anti-aging agent, and 3 parts stabilizer. The modified lignin is a lignin oligomer containing ester, acetyl, and ether cross-linked structures, with a weight-average molecular weight of 800-1200 Da, a dispersion coefficient ≤1.5, and a carboxyl content ≤0.2 mmol / g. This invention successfully overcomes the technical defects of existing plasticizer carriers, such as high toxicity, difficulty in degradation, and poor compatibility with polymer matrices, providing an environmentally friendly plasticizer using modified lignin as a carrier. This technical solution achieves the dual goals of high-value utilization of lignin and greening of the plasticizer product.

The invention relates to a method for one-step synthesis of high-quality stannous oxide through intermittent ultrasonic reinforcement, and belongs to the technical field of semiconductor material preparation. The preparation method comprises the following steps: dropwise adding a sodium hydroxide aqueous solution into a stannous chloride aqueous solution at room temperature under a stirring condition until the pH value is 12.5-13.5 to form a mixed solution system; applying intermittent ultrasonic waves to the mixed solution system for intermittent ultrasonic treatment to induce direct nucleation and growth of stannous oxide and synchronous removal of chlorine impurities, carrying out solid-liquid separation, and drying the solid to obtain the low-chlorine fine-particle-size stannous oxide. According to the method, through the work-stop periodic effect of intermittent ultrasound, dynamic conditions are provided for diffusion and desorption of chloride ions while nucleation and growth regulation are promoted through cavitation, cooperative regulation of particle size refinement and deep dechlorination of stannous oxide is achieved, a high-temperature step or repeated washing is not needed, the process is simple and efficient, the conditions are mild, and the method is suitable for industrial production. And controllable preparation of the high-performance stannous oxide material can be realized.

The present application belongs to the technical field of instant meat product processing, and discloses an instant ham and a preparation method. The method comprises low-salt pickling and semi-mature fermentation, high-temperature three-gradient fermentation after slicing and addition of probiotics, and the combination of vacuum temperature-changing fermentation ripening and bacteriostatic process, and processes the instant ham which is quickly fermented and matured, reduces the content of salt, inhibits the growth of rancidity and harmful bacteria, and is convenient to eat after opening the bag. The present application first proposes that the meat product after rapid fermentation is vacuum packaged and then subjected to special vacuum high-temperature fermentation ripening and bacteriostatic treatment at a high temperature of 49-52 DEG C. The process can not only significantly shorten the fermentation time to about 110-120 minutes, but also basically kill the non-sporulated vegetative microorganism cells in the vacuum-packaged ham, while allowing the probiotics to be retained to a certain extent and avoiding the pollution of microorganisms and other harmful substances thereafter. The "fast, low-salt, flavor, instant" ham product prepared by the present application technology cannot be realized by the existing ham fermentation technology.

The application belongs to the field of engineering plastics, and particularly relates to long-chain polyamide resin with easy processing and high tensile property, and a preparation method and application thereof. The long-chain polyamide resin comprises the following raw material components: component a: aliphatic carboxylic acid compound component; component b: polyamine compound component; and component c: a compound with a structure shown in the following formula (1), wherein n and m can be any number between 1 and 10. The long-chain polyamide resin of the application introduces structural diacid with an asymmetric benzene ring structure, utilizes the asymmetric structure to reduce the crystallinity of the material, and introduces the benzene ring structure to improve the mechanical property of the polyamide material, so that the low processing temperature is realized from the polyamide material component itself, the energy consumption is reduced, and the mechanical property of the polyamide material is ensured. The problem that the processing temperature and mechanical property of the polyamide material and the processing energy consumption are difficult to be considered in the prior art is solved.

The application belongs to the technical field of MAX phase material preparation, and particularly relates to a method for preparing MAX phase material based on natural metal minerals. The method comprises the following steps: mixing natural metal mineral powder, aluminum powder and graphite powder, and then ball milling to obtain activated precursor powder; pressing the activated precursor powder into a dense blank, and synthesizing a block material through self-propagating high-temperature reaction; crushing the block material and sieving to obtain a MAX phase powder material, wherein the natural metal mineral is rutile and / or chromite; and the general formula of the MAX phase powder material is (Ti 1‑x Cr x ) n+1 AlC n , wherein 0<=x<=1, and n is 1 or 2. The method is different from the prior art in reaction principle, realizes cost reduction and greenization of the whole chain of raw materials, synthesis and etching, and solves the problem of mineral impurities by using the instantaneous high-temperature characteristics of SHS.

The invention relates to the technical field of sewage treatment and biological energy, and particularly discloses a method for converting sewage into biofuel for power generation. According to the method, a multi-factor synergistic system containing an inducing factor, a phagocytosis factor and a powdered sugar factor is generated through photosynthetic induction, the inducing factor destroys harmful microorganisms, the phagocytosis factor fixes radioactive substances, germs and viruses, and the powdered sugar factor serves as a carbon value locking precursor; organic pollutants are directionally converted into alcohol clean energy carriers by utilizing a multi-factor synergistic system, and meanwhile, fixed capture of the pollutants is completed; the carbon value is locked by a carbon value locking agent to generate a fixed carbon mixture, and the fixed carbon mixture is dehydrated and dried to obtain the high-purity biochar fuel. Unification of harmless treatment and energy utilization of the radioactive sewage is realized, and the limitation that the radioactive sewage cannot be treated in the traditional technology is broken through.

The invention relates to a full-particle-size flotation process method for improving the recovery rate of lepidolite through fine silt pretreatment. The full-particle-size flotation process method comprises the following steps that crushed lepidolite raw ore is subjected to ore grinding operation; conveying the ore grinding product to a first hydrocyclone; feeding an underflow product of the first hydrocyclone into a five-lamination high-frequency vibrating screen, returning an oversize product to a ball mill for regrinding, and removing iron from an undersize product; feeding the non-magnetic material subjected to iron removal into a spreading chute; carrying out shaking table roughing and re-selection on the distributed ore concentrate; feeding the cloth sliding tailings and the shaking table roughing and checking tailings into a first-section cyclone; overflow of the first-section cyclone is fed into a first deep-cone thickener; the deep cone underflow is added into a fine silt pretreatment tank, a dispersing agent is added into the fine silt pretreatment tank, uniform stirring and pretreatment are performed, and pretreated fine silt is obtained; and the first-section cyclone underflow and pretreated fine silt mixed ore pulp is added into a flotation stirring barrel, a matched collecting agent is added, and flotation operation is carried out. The method can improve the recovery rate of lepidolite, synchronously improve the whiteness of feldspar and the like.

The application discloses a boride double-scale synergistically reinforced high-manganese steel-based wear-resistant casting and a preparation method thereof, and belongs to the technical field of wear-resistant metal materials and special casting. The casting takes high-manganese steel as a matrix, adopts micron-level TiB2 and nanometer-level ZrB2 to form double-scale boride reinforcing phases, controls the distribution of the reinforcing phases through a powder core wire mesh weaving technology, and forms a metallurgical bonding interface through spray deposition and isothermal annealing. The synergistic improvement of tensile strength, impact toughness and wear resistance is realized. The product is suitable for high-stress wear environments in the mining, metallurgy, building material and other industries, effectively solves the technical pain point that the strength and toughness of traditional high-manganese steel are difficult to be considered, the process is stable and controllable, and differential strengthening can be realized, and the product has industrial application value.

The utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide separation tower technical field, the utility model discloses an energy -saving carbon dioxide trapping separation tower relates to carbon dioxide.

The invention discloses a method for separating and refining fusel oil in Fischer-Tropsch synthesis, and belongs to the technical field of chemical separation. In order to solve the problems of difficult separation and high energy consumption of fusel oil due to the existence of azeotrope, the invention provides a rectification and membrane separation coupled process. The method comprises the following steps: firstly, pretreating a fusel oil raw material through a two-stage rectifying tower, and sequentially removing water, heavy components and light components; then carrying out neutralization desalination treatment on the obtained mixed alcohol solution, and then feeding the mixed alcohol solution into a steam permeable membrane system for deep dehydration to obtain mixed alcohol steam with low water content; and finally, sequentially feeding the dehydrated alcohol steam into a subsequent rectifying tower, and separating to obtain high-purity ethanol, n-propyl alcohol and n-butyl alcohol products. Through energy integration design, high-temperature material flow is used for preheating raw materials and providing a heat source for the rectifying tower, and energy consumption is remarkably reduced. The method is reasonable in process, effectively breaks through the alcohol-water azeotropic limitation, and realizes efficient and low-cost separation of high-added-value components in fusel oil.

This invention proposes a method for the co-production of silicon tetrafluoride and magnesium fluoride, belonging to the technical field of preparing high-purity fluorides by pyrolysis of fluorosilicates. The method includes: placing magnesium fluorosilicate hexahydrate in a reactor, and under a non-oxidizing atmosphere, first dehydrating it at 60℃~70℃ until the moisture content of the discharged gas is below 50ppm, then pyrolyzing it at 150℃~180℃ for 1.5h~3h to generate silicon tetrafluoride gas and magnesium fluoride solid. The silicon tetrafluoride is collected, adsorbed, and purified by distillation to obtain a 5N~5.5N electronic grade product; the magnesium fluoride is crushed and classified to obtain a coating product with a D50 of 2μm~10μm and a purity of 4N. This invention, through a segmented temperature control strategy, first thoroughly dehydrates and then pyrolyzes at low temperature, effectively suppressing side reactions. The process is simple, with no waste emissions. It can be synthesized fresh from fluorosilicic acid and magnesium hydroxide, or refined from industrially produced magnesium fluorosilicate by recrystallization, resulting in high added value and easy industrialization.

This invention discloses a high-purity fluorobenzene recovery process in the production of 1,4-bis(4-fluorobenzoyl)benzene, belonging to the field of organic waste liquid recovery technology. Step 1 involves reacting the fluorobenzene waste liquid through a tubular reactor containing anhydrous aluminum chloride particles to obtain dehydrated fluorobenzene waste liquid. The reaction temperature is 5-40℃, the residence time is 60-200 min, and the flow rate of the fluorobenzene waste liquid is 0.1-0.4 m / min. Step 2 involves filtering the dehydrated fluorobenzene waste liquid through a micron filter, then distilling it in a fluorobenzene distillation column. The organic vapor at the top of the column is compressed by a compressor, heat-exchanged by an MVR heat exchanger, condensed, and then refluxed in a reflux tank. High-purity fluorobenzene is obtained from the fluorobenzene distillation column, wherein the fluorobenzene purity is greater than 99.99 wt% and the water content is less than 10 ppm. This invention uses fluorobenzene waste liquid from the production process of 1,4-bis(4-fluorobenzoyl)benzene as raw material. Through reaction dehydration, crystalline aluminum chloride filtration and distillation, it achieves continuous batch production of high-purity fluorobenzene. The process is simple and has low energy consumption.

The present application belongs to the technical field of metallurgy and mineral processing suspension fluidization roasting, and particularly relates to a system and process for producing nickel by coal-based roasting reduction electric furnace smelting of laterite nickel ore. The system comprises a feeding drying unit, a preheating drying and crushing unit, a heat supply heating unit, a coal-based pre-reduction unit, an electric furnace smelting waste heat recovery unit, a dust removal, powder conveying and desulfurization unit, and the laterite nickel ore is processed by the "dry powder crushing, coal suspension roasting, coal-based pre-reduction, and ore-smelting electric furnace" technology. The present application has strong adaptability to raw materials, can produce high-value products from cheap resources, and adopts multiple energy-saving technologies in the new process to greatly reduce energy consumption and realize efficient use of energy. The present application makes up for the limitations and deficiencies of the traditional RKEF process, can reduce process energy consumption, improve resource recovery rate, provides a new innovative breakthrough direction for efficient utilization of laterite nickel ore resources for smelting nickel-iron alloy, and can greatly improve the economic value of the development and utilization of such resources.

The invention discloses a method and an apparatus for preparing a purified 1, 4-butanediol composition. The method comprises the following steps: providing a dividing wall column; a 1, 4-butanediol composition to be purified is introduced into the dividing wall column, and the purified 1, 4-butanediol composition is prepared through the dividing wall column; the 1, 4-butanediol composition to be purified is prepared from gamma-butyrolactone, dimethyl succinate and 1, 4-butanediol. Effective separation and purification can be realized by only adopting one dividing wall column, so that not only is the equipment investment saved, but also the energy consumption is reduced.

The application provides a polyolefin foamed bead and a preparation method and a foamed product thereof, and belongs to the technical field of foamed materials. The preparation method of the polyolefin foamed bead comprises the following steps: mixing polyethylene, an alpha-olefin elastomer and a crosslinking agent, and then adding the mixture into an open mill to perform melt extrusion and granulation, so as to obtain a polyolefin composite; mixing the polyolefin composite with polypropylene, adding a supercritical fluid in a plasticizing stage of a first-order extruder, and adopting a cooling process in a second-order extruder, so as to obtain the polyolefin foamed bead. The polyolefin foamed bead has low forming pressure, high heat resistance and high foaming ratio.

This invention discloses a method for hydrothermal humification of organic waste. The organic waste is mixed with potassium hydroxide and water, and subjected to a hydrothermal reaction. The organic waste contains 25-45 wt% cellulose, 10-25 wt% hemicellulose, 10-25 wt% lignin, and 8-12 wt% protein, respectively, and has a lipid content not exceeding 5 wt%. The method provided by this invention determines the optimal feed conditions and hydrothermal reaction conditions under mesophilic rapid hydrothermal humification, improving the humic acid yield, which can reach up to 19 wt% of the feed dry weight. This invention achieves value-added recycling of biomass and effectively reduces process energy and pesticide consumption.

The application discloses a liquor tailing acid substance extraction method in liquor brewing and liquor, and comprises the following steps of pretreatment, selective adsorption, gradient desorption, membrane separation and purification and liquor body blending. The chelation precipitation-microfiltration coupling process is adopted in the pretreatment to remove metal ions and colloidal impurities; the acid substances are specifically adsorbed through a hexanoic acid molecular imprinting polymer adsorbent, and step-by-step elution is realized by combining with gradient pH desorption; high-purity acid concentrated solution is obtained through nanofiltration membrane separation and activated carbon adsorption, and after screening, the high-purity acid concentrated solution is blended with a base liquor body to improve the quality of the liquor.

The invention discloses a method for preparing high-purity ferric oxide by using pickling waste liquid of a steel mill, and belongs to the technical field of inorganic pigments. The method comprises the following steps: by taking steel mill pickling waste liquid as a raw material, pretreating the raw material, and adjusting pH; and then carrying out ion exchange pretreatment, catalytic oxidation, calcination and grinding to obtain iron oxide. Through the efficient acceleration effect of a Mn < 2 + > catalytic oxidation system on conversion from Fe < 2 + > to Fe < 3 + >, the reaction period is remarkably shortened, the process energy consumption is reduced, the process efficiency is greatly improved by combining efficient removal of Ca < 2 + > through ion exchange pretreatment, the steel mill pickling waste liquid is used as the raw material, the production cost is low, large-scale preparation and industrial application are easy, and the method is suitable for industrial production. Meanwhile, the prepared ferric oxide is high in purity, strong in color consistency and good in stability, and the hue L value deviation is 1t; 2.

The invention discloses a neutralization solution soluble protein removal method based on resin adsorption, and relates to the technical field of biochemical separation.The method comprises the following steps that S1, an organic acid fermentation neutralization solution is provided and pretreated; s2, sequentially introducing the pretreated neutralization solution into a first adsorption unit and a second adsorption unit for serial adsorption; the first adsorption unit is filled with hydrophobic adsorption resin; the second adsorption unit is filled with adsorption resin with weak anion exchange groups or affinity ligands; and S3, respectively carrying out regeneration treatment on the resin filled in the first adsorption unit and the second adsorption unit. According to the method, a double-stage series adsorption system is adopted, the problems of ion shielding effect and competitive adsorption under high ion strength are effectively solved, the protein removal rate is as high as 96.8% and is remarkably superior to that of a traditional technology, and the product purity is greatly improved.

This disclosure provides a method and system for removing zinc from galvanized steel sheets, belonging to the field of resource recycling technology. The method includes: pickling and immersing the galvanized steel sheet in an inorganic acid to obtain a zinc salt solution and hydrogen gas; subjecting the zinc salt solution to multi-effect evaporation to obtain a concentrated solution and a condensate of the inorganic acid, the condensate of which is reused in the pickling process; calcining the concentrated solution to obtain solid oxides and tail gas containing hydrogen chloride or sulfur trioxide, the tail gas being reused in the pickling process; magnetically separating the solid oxides to obtain magnetic and non-magnetic oxides; and using the hydrogen gas generated from the pickling process to reduce the non-magnetic oxides, which are then collected by condensation to obtain zinc metal with a purity greater than 99%. This disclosure achieves closed-loop utilization of hydrochloric acid or sulfuric acid and water resources, with high zinc recovery rate, low energy consumption, and both economic and environmental benefits.

The application discloses a belt sintering machine body waste heat recovery method, belongs to the technical field of industrial waste heat recovery, and aims to solve the problem that sensible heat of a sintering machine return trolley is not effectively utilized. Firstly, according to the measured temperature, the return path is divided into a high-temperature zone (>= 300 DEG C), a medium-temperature zone (150-300 DEG C) and a low-temperature zone (< 150 DEG C). Subsequently, a radiation heat exchange device is arranged above the trolley body in each temperature zone, the lower surface of the device keeps a small gap of 2mm to 40mm with the moving trolley, and heat exchange safety is ensured without interference. Waste heat utilization is divided into two levels: the heat exchange device in the high-temperature and medium-temperature zones is connected to an economizer or an evaporation section of a waste heat boiler, a steam-water cycle is formed to produce steam, and the steam is used for power generation or process heating; the heat exchange device in the medium-temperature end and the low-temperature zone forms an independent hot water circulation system, and the output hot water is used for preheating of sintering mixture, heating of a factory area and life facilities. The application opens up a new source of sintering waste heat, and through a cascade utilization mode, remarkable energy saving and consumption reduction and economic benefits are realized.

The present application relates to the technical field of agricultural and sideline products processing, and the present application relates to a rolling and kneading machine for sauce beef production, which comprises an outer support, a turnover mechanism arranged on the outer support, a rotary rolling and kneading mechanism arranged on the turnover mechanism, and a reciprocating gathering mechanism connected to the rotary rolling and kneading mechanism; the present application adjusts the osmotic pressure during processing through reciprocation, increases the mass transfer efficiency, and improves the efficiency of rolling and kneading curing; after rolling and kneading is completed, the reciprocating push plate can clean and scrape the rotary shell and the spiral scraper, assist in discharging, and at the same time, residual materials are accumulated in the port area of the rotary shell, so that the space that needs to be cleaned is effectively reduced, and the overall efficiency of the equipment cleaning link is significantly improved; through intermittent powder addition, the problem of agglomeration caused by concentrated addition of a large amount of powder is avoided, so that the powder added at a time can obtain sufficient diffusion space in the dynamic environment of continuous rolling and kneading, the dispersed beef pieces are quickly captured and fully kneaded and dispersed, and finally the risk of powder caking is significantly reduced.

This invention discloses a high-purity ultrafine spherical silica powder, its production method, and its application, belonging to the technical field of high-value mineral material preparation and high-value utilization of industrial solid waste. The preparation method includes: flotation and acid washing of silica mud to obtain purified silica powder; air jet milling and air jet classification of the purified silica powder to obtain ultrafine silica powder; and feeding the ultrafine silica powder into a plasma reactor in the presence of an oxygen-containing flow, causing simultaneous oxidation and spheroidization to obtain high-purity ultrafine spherical silica powder. The oxygen volume concentration in the oxygen-containing flow is 25-60%; the ratio of the input power of the plasma reactor to the powder feeding rate of the ultrafine silica powder is 15 kWh / kg-50 kWh / kg. Based on the material characteristics of silica mud, this method achieves high-value utilization of silica mud through the synergistic regulation of pretreatment purification, precise particle size control, and energy-coupled spheroidization throughout the entire process, while possessing advantages such as low energy consumption, uniform product particle size, high purity, and good sphericity.

The present application provides a kind of green conversion method of biogas sulfur paste based on biological catalysis technology, belong to solid waste resource and green chemical technology field.The green conversion method of the present application includes the following steps:S1, sulfur paste dry material is oxidized using desulfurization microbial inoculum, the product after oxidation is sequentially heated and melted, reduced pressure rectification, and the purified product is obtained;S2, the purified product is mixed with an alcohol solvent, an enzyme catalyst is added for catalytic reaction, and after the reaction is completed, carbon disulfide is obtained by separation and purification;The enzyme catalyst is lipase;Or S2 is to heat and melt the purified product, add a polymerization aid, after heat preservation, pour the molten material into excess cold water to cool, solidify and dry, and obtain insoluble sulfur.The technical scheme of the present application realizes the resource treatment of biogas sulfur paste, and the process is green and environmentally friendly, and the product has high added value.

A process for preparing succinic anhydride by hydrogenation of maleic anhydride is disclosed. The process uses an organic solvent with a boiling point not exceeding 150°C, capable of dissolving maleic anhydride, and not reacting with it as the reaction solvent. The maleic anhydride is dissolved at a concentration of 10wt%–75wt%, and then reacted with hydrogen and a homogeneous catalyst in a hydrogenation reactor. The reaction pressure is adjusted to maintain the reaction temperature between 30°C and 150°C, and the solvent in the reaction system is kept boiling by adjusting the pressure. A gas outlet is provided on the hydrogenation reactor, through which the organic solvent and unreacted hydrogen are continuously discharged. After the reaction, the reaction product is subjected to solid-liquid separation and / or crystallization to obtain succinic anhydride. This process uses an organic solution containing dissolved maleic anhydride as a raw material and utilizes pressure adjustment to maintain the solution in the reaction system at a boiling state. This allows for timely removal of heat from the reaction system through the phase change of the organic solvent, effectively solving the temperature rise problem in the hydrogenation of maleic anhydride to prepare succinic anhydride. The method is simple to operate and easy to promote and apply industrially.