1106 results about "Oxygen enrichment" patented technology

The invention provides a smelting method for improving the stability of a blast furnace under the condition of high gas utilization rate, which comprises the following steps: step 1, using a bell-less furnace top, and preparing charging materials in a tank combination manner, the charging materials comprising coke and ore; step 2, annularly distributing the coke and the ore at a preset angle position in the blast furnace by adopting a simultaneous loading and distributing method; and step 3, keeping the gas utilization rate at 48-54.0%, carrying out blast furnace smelting, dynamically adjusting the oxygen enrichment amount and the coal injection amount of the blast furnace according to the furnace building condition, dynamically adjusting the fuel ratio or the air volume of the blast furnace according to the gas utilization rate decreasing condition, and dynamically adjusting the coal injection amount or the clean coke of the blast furnace according to the stockline decreasing condition. By accurately controlling the ore coke distribution gradient, forming a coal gas flow structure with heavy loads on the edge and an open center, the pressure difference in the furnace can be stabilized through linkage adjustment of the oxygen enrichment amount and the coal injection amount, the fuel ratio / air volume dynamically adjusts and compensates a heat notch, furnace temperature fluctuation is avoided, and the activity of the hearth is rapidly recovered according to the stockline abnormity, the coal injection or net coke supplement strategy.

The invention provides a treatment method of copper-nickel concentrate rich in platinum group metals, which comprises the following steps: feeding the copper-nickel concentrate rich in platinum group metals and a first flux into a smelting furnace, and introducing first oxygen-enriched gas for smelting; copper matte and a second flux are continuously fed into a first converting furnace, and second oxygen-enriched gas is continuously introduced for first converting; raw copper and a third flux are fed into the oxygen inclined blowing rotary converter, and oxygen is introduced for second blowing; the crude copper is fed into an anode refining furnace, and air and a first reducing agent are introduced for fire refining; casting the copper liquid into an anode plate, and carrying out electrolytic refining on the anode plate; feeding the first converting slag, the second converting slag, a second reducing agent and a vulcanizing agent into a dilution electric furnace for slag dilution to obtain low-nickel matte and dilution slag; and the low-nickel matte is fed into a third converting furnace, air or oxygen-enriched air is introduced for third converting, and the problem that the recovery rate of nickel metal elements and platinum group metals in the copper-nickel concentrate rich in the platinum group metals is low is solved.

The utility model discloses a high-efficiency energy-saving ceramic handicraft firing kiln, which comprises a kiln body and has the beneficial effects that a kiln car and a firing frame are arranged, so that the kiln car can be pulled out of the kiln body, the kiln car is supported in an auxiliary manner through a guide roller at the top of a guide support plate, and the kiln car and the firing frame are pulled out, so that the kiln car can be conveniently fired. Ceramic needing to be fired can be conveniently placed on the firing frame, the position of the kiln car in the kiln body is jacked and fixed through the inner jacking block on the inner side of the kiln door, the kiln car and the firing frame are stably placed in the kiln body, the stability of the position during ceramic firing is improved, and through the arrangement of the heat preservation box and the heat exchange copper gas pipe, high-temperature smoke in the heat preservation box is achieved; gas treated by the oxygen enrichment device in the heat exchange copper gas pipe is heated, the temperature of combustion-supporting gas is increased, the combustion-supporting gas is mixed with gas supplied by the gas pipe in the concentration gas box, the mixture is sprayed out through the ventilation box and the combustion nozzle, ignition is conducted through the ignition rod, and ceramic firing is conducted through fuel.

The invention belongs to the field of flexible peak regulation and carbon reduction of thermal power generating units, and discloses a power station boiler oxygen-enriched hydrogen-ammonia-doped system and a working method thereof.The power station boiler oxygen-enriched hydrogen-ammonia-doped system comprises a boiler, and two combustors on the lower portion of the boiler are micro-hydrogen combustors; a combustion outlet of the micro-hydrogen combustor is connected with a lower hearth of the boiler, the hydrogen main gun is obliquely inserted into the inner side of a pulverized coal air chamber of the micro-hydrogen combustor, the hydrogen ignition gun is located in the middle of the pulverized coal air chamber of the micro-hydrogen combustor, and the hydrogen main gun and the hydrogen ignition gun are both connected with the hydrogen supply system. The boiler is provided with secondary air nozzles above and below each burner, the secondary air nozzle below the lowermost micro-hydrogen burner is arranged as a lower secondary air nozzle, the secondary air nozzle above the lowermost micro-hydrogen burner is arranged as an ammonia-doped secondary air nozzle, and the secondary air nozzle below the lowermost micro-hydrogen burner is arranged as an ammonia-doped secondary air nozzle. The secondary air nozzles above and below the uppermost micro-hydrogen burner are ammonia-doped secondary air nozzles, and ammonia gas inlets of the ammonia-doped secondary air nozzles are connected with an ammonia supply system. The problem of unstable combustion under low load can be solved by combining hydrogen-doped ammonia combustion and air oxygen-enriched combustion supporting.

The invention relates to the technical field of energy conservation and environmental protection, and discloses a biomass oxygen-enriched combustion optimization and pollutant intelligent control system and method.The biomass oxygen-enriched combustion optimization and pollutant intelligent control system comprises a boiler temperature and pressure prediction system, a fuel prediction regulation and control system, a primary and secondary air prediction regulation and control system, a flue gas amount prediction system, a flue gas recirculation regulation and control system and a desulfurization and denitrification intelligent control system; the fuel prediction regulation and control system comprises a fuel identification module, a fuel heat value prediction module and a fuel demand prediction module; the primary and secondary air predictive regulation and control system comprises a primary air calculation module and a secondary air calculation module; the flue gas quantity prediction system comprises an induced draft fan control module and a flue gas prediction module; the flue gas recirculation regulation and control system comprises a recirculation quantity prediction module and a supplement quantity prediction module; the desulfurization and denitrification intelligent control system comprises a pollutant prediction module, a desulfurization agent prediction module and a denitrification agent prediction module. According to the invention, dynamic optimization and accurate control of the biomass boiler under the oxygen-enriched combustion condition can be realized.

The invention provides an energy system for synthesizing green methanol based on biomass gasification and oxygen-enriched combustion, and belongs to the technical field of new energy. The energy system comprises an electrolysis system, an oxygen-enriched combustion system, a methanol synthesis system, a biomass gasification system and an ammonia-process carbon capture unit, an oxygen outlet of the electrolysis system is communicated with the oxygen-enriched combustion system, and a hydrogen outlet of the electrolysis system is communicated with the methanol synthesis system; oxygen generated by the electrolysis system is supplied to the biomass oxygen-enriched combustion system for supporting combustion, and hydrogen is supplied to the methanol synthesis system; a hydrogen outlet of the biomass gasification system is communicated with the methanol synthesis system; a carbon dioxide outlet of the oxygen-enriched combustion system is communicated with the methanol synthesis system through the ammonia-process carbon capture unit; the material energy flow of the energy system is adjusted through hydrogen generated by the biomass gasification system, and the adjusting flexibility of the energy system is improved; the concentration of carbon dioxide output by the oxygen-enriched combustion system is concentrated through the ammonia-process carbon capture unit, and the pretreatment requirement of methanol synthesis is met.

The invention discloses a local space oxygen enrichment control system and method based on an oxygen selective permeable membrane, belongs to the technical field of air purification, environment control and membrane separation, and aims to solve the problems that the indoor oxygen concentration cannot be actively and efficiently increased and compact integration is difficult in the prior art. The system integrates an outdoor fresh air fan, a switching valve, an oxygen enrichment membrane device, an air pump, an indoor air return and supply fan, a gas monitoring control unit, an outdoor exhaust fan and the like, and a control unit dynamically regulates and controls a switching valve passage, the rotating speed of each fan and start and stop of the air pump according to the difference between oxygen sensor data and preset target oxygen concentration; air selectively passes through the oxygen-enriched membrane device to generate oxygen-enriched air or is fed into a room through a bypass air path, and the indoor oxygen concentration is actively stabilized at 21%-26%. The system is suitable for local spaces such as residences and offices, active oxygen enrichment and environment control can be achieved, the air quality is improved, and meanwhile low energy consumption, safety and comfort are taken into account.

The embodiment of the invention provides a flue gas circulation hydrogen-doped combustion peak regulation and combustion stabilization system. The flue gas circulation hydrogen-doped combustion peak regulation and combustion stabilization system comprises a boiler, a water electrolysis device, a flue gas-hydrogen mixer and a flue gas-hydrogen combustor. The boiler is provided with a burner, and the flue gas-hydrogen burner is arranged on the lowermost layer of the boiler; the water electrolysis device is powered by the power supply device, an anode outlet of the water electrolysis device is communicated with a combustion improver inlet of the combustor, and a cathode outlet of the water electrolysis device is communicated with a hydrogen inlet of the flue gas-hydrogen mixer; a flue gas outlet of the boiler is respectively communicated with an inlet of the chimney and a flue gas inlet of the flue gas-hydrogen mixer; and a mixing outlet of the flue gas-hydrogen mixer is communicated with an inlet of the flue gas-hydrogen burner. According to the system, through hydrogen-doped combustion and oxygen-enriched combustion, boiler combustion is stable and safe during deep peak regulation of a unit, coal consumption is reduced, and cost is saved.

The embodiment of the invention discloses a fly ash coal oxygen-enriched melting intelligent control method based on multi-mode coupling prediction, and belongs to the technical field of solid waste recycling and intelligent control crossing. The method comprises the steps that S101, multi-source data collected by a sensor is obtained; step S102, obtaining control parameters through an intelligent control algorithm according to the multi-source data; s103, according to the control parameters, controlling an oxygen-enriched spray gun, a slurry outlet and a material ratio; wherein the step S102 comprises the sub-steps of performing decoupling prediction on the temperature T, the hearth negative pressure P, the flue gas oxygen concentration CO and the molten slurry yield Qp by adopting a multivariable decoupling prediction model; carrying out fuzzy control on the hearth negative pressure P by adopting a fuzzy self-adaptive PID (Proportion Integration Differentiation) controller; and a multi-objective optimization algorithm is adopted to calculate and obtain control parameters. The control method is small in melting temperature fluctuation, high in hearth negative pressure stability, high in quartz sand utilization rate, low in energy consumption per ton of molten slurry and high in heat preservation cotton qualification rate.

The invention provides a method for recovering copper and diluting matte converting slag through self-heating collaborative smelting, and relates to the field of metal recovery. The method comprises the steps that liquid copper matte converting slag generated in the copper smelting process is directly discharged into a hot-state collaborative smelting furnace, multi-source copper-based solid waste subjected to coarse crushing and mixing is added, collaborative smelting is carried out under the oxygen-enriched air condition, and collaborative smelting comprises the melting period, the dilution period and the standing period; in the melting period, copper, aluminum, iron, lead and tin in the copper-based solid waste are quickly melted to form first crude copper; in the depletion period, aluminum and iron in the first crude copper and organic matter in the copper-based solid waste serve as reducing agents to reduce oxides of copper, nickel, cobalt, zinc and lead in the matte converting slag into metal states, the metal states enter the first crude copper to form second crude copper, and after being oxidized, the iron and the aluminum enter the matte converting slag to form second slag; and in the standing period, a reducing agent is added, air blowing is ended, third crude copper and third slag are formed after standing, and a crude copper product is collected.

The utility model relates to the technical field of medical oxygen generators, and discloses a high-efficiency energy-saving PSA oxygen generator which comprises an adsorption tank, a gas inlet pipeline, a nitrogen discharge pipeline, an I-shaped balance pipeline, a first purging pipeline, a second purging pipeline, an oxygen outlet pipeline, a purity measurement pipeline, a qualified gas pipeline, an unqualified gas pipeline and an emptying pipeline, a throttling element is arranged on each of an inlet pipeline and an outlet pipeline of the adsorption tank and used for controlling the flow of gas when the adsorption tank is balanced, impact of high-speed gas on a molecular sieve is avoided, oxygen-enriched air can stay at the top of the adsorption tank in various balance modes, and desorbed low-concentration oxygen is adsorbed again to obtain the oxygen-enriched air. And the oxygen recovery rate is improved, so that the air consumption is reduced, the required power of an air compressor is reduced, and the energy consumption required by oxygen production is reduced.

An ultra-low load combustion device adapted to tangentially fired boilers, which relates to the technical field of combustion boilers, specifically an ultra-low load combustion device adapted to tangentially fired boilers. The present invention protects the ultra-low load combustion device: adding a layer of low-capacity pulverized coal burners above the original top-layer primary air burners, and adding a layer of secondary air nozzles above the low-capacity pulverized coal burners; adding a small-capacity pulverized coal feeding device, and the small-capacity pulverized coal feeding device is connected to the low-capacity pulverized coal burners - and other 5 kinds of tangentially fired boiler retrofit structures. The ultra-low load combustion device of the present invention can achieve long-term stable operation of the boiler at 15% of the rated load and below without any auxiliary combustion aids such as oil, gas, plasma, and oxygen enrichment.

The invention belongs to the technical field of deep sea manganese nodule treatment, and particularly relates to a method for microwave treatment of manganese nodules. When manganese nodules are treated in the prior art, the defects that an additional reducing agent needs to be added, a large amount of by-product gas polluting the environment exists in products, the reaction rate is low, the treatment time is long, energy consumption is high, pollution is large, and the separation efficiency of gangue components in minerals is low exist. In order to solve the problems, the method for microwave treatment of the manganese nodule comprises the following steps of microwave preheating activation, ore grinding premixing, microwave reduction acid leaching, sulfuration precipitation, microwave sulfuration smelting, oxygen-enriched blowing, microwave roasting oxygen pressure leaching, multi-stage extraction and microwave treatment. And the structure of the manganese-containing aggregate in the raw ore is destroyed, and gas-phase components in the raw ore overflow, so that the leaching rate and the recovery rate of valuable metals are greatly improved.

The invention provides a process method and system for directly capturing carbon dioxide from air and converting and utilizing the carbon dioxide. The process method comprises the following steps: adsorbing raw material gas through a carbon dioxide trapping device, and heating and desorbing to obtain purified carbon dioxide gas; the purified carbon dioxide gas and the electrolyte are subjected to electrocatalytic conversion to obtain synthesis gas, oxygen and condensate water, and the condensate water is recycled through water treatment operation to be used for supplementing the electrolyte; the method comprises the following steps: carrying out Fischer-Tropsch synthesis reaction, hydrocracking and isomerization reaction on synthesis gas to obtain an isomerized oil-gas mixture, wherein heat energy generated by the reaction provides heating desorption heat; and carrying out gas-liquid separation on the heterogeneous oil-gas mixture to obtain combustible gas and an upgraded oil product, carrying out rectification operation on the upgraded oil product to obtain an SAF component and a heavy oil product, and carrying out oxygen-enriched combustion reaction on the combustible gas and oxygen to provide heating desorption heat or supply required heat energy. An integrated and flexible industrial technology platform is developed, carbon capture and conversion processes are seamlessly connected, full-chain optimization from CO2 removal to high-added-value product generation is realized, and self heat energy requirements and wastewater utilization can be met.

The invention discloses a high-temperature turbulent environment particle ignition combustion testing device based on rotational flow flame stabilization, and belongs to the field of combustion testing. The burner is composed of an external rotational flow flame stabilizing device, a central premixing burner, an adjustable turbulence intensity pore plate and a central powder supply pipe. High-temperature and high-speed methane turbulence flames are generated through the central premixing burner, flame stabilization is conducted on the high-temperature and high-speed turbulence flames through the external rotational flow flame stabilization device, and the turbulence intensity of the flames is improved. A high-speed turbulent flow field and a high-temperature flue gas range are constructed through high-temperature and high-speed methane flames, combustion of aluminum particles in the turbulent flow field is achieved, and the combustion rule of the aluminum particles in a complex flow field is researched and tested. The turbulence intensity of high-temperature and high-speed turbulence flame is changed by changing the pore density and the pore diameter of the adjustable turbulence intensity pore plate, and the gas ratio in the central premixing combustor, so that simulation of different fuel gas oxygen enrichment degrees, turbulence intensities and flame temperatures is realized, and test analysis of different turbulence intensities on the combustion process of condensed phase particles is realized.

The invention discloses a low-carbon collaborative smelting method for an antimony-containing material, which adopts a technical route of oxygen-enriched side-blown smelting, oxygen-enriched side-blown reduction and top-blown oxidative volatilization to treat a mixed material of antimony concentrate and high-antimony anode slime, and adopts a mode of mixed blowing of a powdery raw material and oxygen-enriched air to prepare the low-carbon collaborative smelting method for the antimony-containing material. Compared with the prior art, reaction kinetic conditions of materials and oxygen when the materials are fed into the furnace are enhanced, advanced volatilization of sulfides and generation of antimony matte are effectively restrained, chemical reaction heat is fully absorbed by melt, heat excess in the smelting process is achieved, high-proportion antimony-containing secondary materials can be treated through the part of heat, and multi-material synergistic self-heating smelting is achieved. And meanwhile, Au and Ag are collected through crude antimony metal generated through reduction, high-quality antimony bletilla and high-concentration precious metal alloy can be produced through volatilization blowing, and short-process recovery of precious metal elements is achieved. The method is a brand-new technical route for widening the application range of raw materials, reducing cost and improving efficiency in antimony smelting plants.

The invention provides an electro / thermochemical gradient hydrogen production system and method for solar radiation energy grading and residual light energy thermal complementary coupling. The system comprises a light condensation assembly; the frequency division assembly is used for grading solar spectrum radiation; a photovoltaic cell power generation device; the methane oxygen-enriched combustion high-temperature photovoltaic power generation device is used for realizing oxygen-enriched combustion of natural gas by utilizing residual heat heat energy and generating power by utilizing radiation energy generated by high-temperature flue gas generated after combustion; the solid oxide electrolytic tank device is used for pushing solid oxide to electrolyze water to produce hydrogen by utilizing heat energy and electric energy contained in the high-temperature flue gas step by step; and the thermal chemical reaction device is used for promoting each step of thermal chemical reaction by utilizing heat energy and electric energy contained in the high-temperature flue gas step by step. The energy source of the system is solar radiation and natural gas, hydrogen and electricity are produced, the system utilizes different energy conversion modes to achieve temperature gradient ordered conversion and utilization of residual light energy after solar frequency division, and complementary coupling of different qualities is achieved on the basis of energy gradient conversion.

A system for oxygen-enriched combustion and fly ash melting of stale garbage includes a garbage incineration system, a fly ash melting system and a liquid oxygen gasification system. The garbage incineration system includes a feed hopper, an incinerator, a waste heat boiler, a flue gas purification system, a bag filter, an induced draft fan, a chimney and a fly ash conveying system. The fly ash melting system includes a fly ash melting furnace, a glass collection system, a secondary combustion chamber and a quenching tower. The liquid oxygen gasification system includes a liquid oxygen storage tank and an air-temperature vaporizer. The liquefied oxygen is divided into two routes, one for supplying the grate combustion section of the garbage incineration system and the other for supplying the fly ash melting system. On the one hand, the new type adopts oxygen-enriched combustion technology to effectively increase the furnace temperature of the incinerator; on the other hand, the fly ash generated by garbage incineration enters the fly ash melting furnace, and oxygen-enriched combustion is used to increase the flame temperature. The fly ash does not need to be transported outside, and can be disposed of in an integrated manner in the garbage incineration power plant, which can realize the resource utilization and harmless disposal of stale garbage and fly ash generated by incineration, and has energy saving and consumption reduction.

The present invention relates to the technical field of water treatment, and provides a system for water quality purification for factory farming of penaeus vannamei, which comprises a treatment tank (100), a bearing platform (200) and a cultivation tank (400), wherein the treatment tank (100) is fixed onto the bearing platform (200), and the cultivation tank (400) is fixed onto the bearing platform (200); a separation plate (101) is fixed in the treatment tank (100), a first water through hole (102) is formed in the separation plate (101), and the separation plate (101) divides the treatment tank (100) into an overflow area (103) and a purification and oxygen enrichment area (104), the purification and oxygen enrichment area (104) being in communication with a pipeline at the bottom of the cultivation tank (400); and a flow-dividing assembly (110) is fixed in the overflow area (103), a desilting assembly (120) is fixed to the bottom of the overflow area (103), a filter assembly (130) is fixed in the purification and oxygen enrichment area (104), the filter assembly (130) comprises a filter box (131), and a disinfection box (150) is fixed onto a side wall of the treatment tank (100). Thus, disinfectant and water can be fully mixed, improving the disinfection and purification effect, and in turn the stress on the penaeus vannamei is reduced, thereby reducing the death rate thereof.

The invention discloses a micro-pressure oxygen-enriched cabin adjusting device, a micro-pressure oxygen-enriched cabin control method and a micro-pressure oxygen-enriched cabin control system. The device is characterized by comprising a high-pressure gas conveying branch, a mixing chamber, an air supply temperature adjusting branch, a sealed cabin and a circulating pump, the first end of the mixing chamber communicates with the high-pressure gas conveying branch, and the second end of the mixing chamber communicates with the air supply temperature adjusting branch. The third end of the mixing chamber is communicated with the circulating passage of the sealed cabin; the first end of the sealed cabin communicates with the air supply temperature adjusting branch, and the second end of the sealed cabin communicates with the circulation path. The circulating pump is arranged on the circulating passage; the high-pressure gas conveying branch is used for conveying the pressurized air to the mixing chamber; the mixing chamber is used for mixing the air of the high-pressure gas conveying branch with the air output by the sealed cabin and then outputting the mixed air; the air supply temperature adjusting branch is used for adjusting the temperature of mixed gas obtained in the mixing chamber and then conveying the mixed gas to the sealed cabin. Compared with an independent air-conditioning device arranged in the sealed cabin, coupling control of pressurization and temperature is achieved, and the system is more energy-saving and efficient.

A process and a plant for the production of hydrogen or for the synthesis of ammonia, said process comprising the following steps: (a) performing a reforming process (101) of a hydrocarbon feedstock (1) to generate a raw syngas (2), said reforming process comprising at least an autothermal reforming step (104) in presence of oxygen-enriched air or pure oxygen (3) produced by an air separation unit (ASU; 103); (b) subjecting said raw syngas (2) to a post-treatment (102) providing hydrogen (H2; 4), a CO2-enriched stream (5), and a residual gas (6); said post-treatment comprising at least a water gas shift conversion step (105) of said raw syngas into a shifted syngas (7), a pressure swing absorption step (106), and a cryogenic separation step (107); wherein said pressure swing absorption step produces said hydrogen and a first tail gas (8) comprising carbon monoxide (CO), carbon dioxide (CO2), residual hydrogen (H2) and unreacted hydrocarbon feedstock from the shifted syngas (7), and said cryogenic separation step separates the CO2-enriched stream and a second tail gas (9) from said first tail gas; said post-treatment (102) comprising a further separation step (120) of a CO2-containing stream (11) and of the residual gas (6) from said second tail gas; (c) recycling said residual gas (6) as feed to said reforming process and / or as fuel to one or more fired heater(s) (10) of said process; (d) optionally feeding a portion (4.8) of said hydrogen (4) obtained in step (b) as fuel to one or more fired heater(s) of said process; (e) optionally an ammonia synthesis step (110) wherein said hydrogen (4) and a nitrogen (N2)-containing stream (12) produced by said ASU (103) are reacted in a given stoichiometric ratio and in ammonia (NH3) synthesis conditions to obtain an ammonia-containing product (13).

The present invention belongs to the technical field of coking production, and in particular relates to a coke oven heating system adopting oxygen-enriched combustion. The coke oven heating system is characterized by comprising an oxygen producing unit, a coke oven heating unit, a flue gas treatment unit and a heat recovery unit, wherein an oxygen-deficient outlet of the oxygen producing unit is connected to the heat recovery unit, an oxygen-enriched outlet of the oxygen producing unit is connected to the coke oven heating unit, and a flue gas outlet of the coke oven heating unit is in communication with the flue gas treatment unit; the coke oven heating unit is connected to a fuel gas pipeline; and a return pipeline is further provided at a flue gas outlet of the coke oven heating unit and is connected to an air inlet of the oxygen producing unit. The present invention has the following beneficial effects: in the coke oven heating system, oxygen-enriched gas is used as the combustion-supporting gas of a coke oven, and main components of waste gas after combustion are carbon dioxide and water vapor which are both polar triatomic molecules having a relatively strong radiation capability, such that the radiation intensity in a combustion chamber of the coke oven can be increased, the radiation heat transfer efficiency in the combustion chamber is improved, and the coking time is shortened.

The invention discloses a method for recovering iron in tailings of copper separation from copper smelting slag through combination of microwave-assisted oxidizing roasting and magnetic separation, and belongs to the technical field of metallurgical solid waste resource utilization. The method comprises the steps that high-temperature copper smelting slag is subjected to water quenching, crushing and ore grinding, flotation and copper removal to obtain tailings containing silicon iron, after a calcium-based additive is added for ball milling and mixing, microwave oxidizing roasting is conducted under the oxygen-enriched condition, roasting products are subjected to high-gradient magnetic separation after crushing and ore grinding, and iron ore concentrate and magnetic separation tailings are obtained. According to the method, the strong wave-absorbing characteristic of fayalite is utilized, the roasting temperature and energy consumption are reduced through microwave heating, iron-silicon separation is achieved through a calcium-based additive, and iron is recycled through magnetic separation in one step. The final magnetic separation iron recovery rate reaches 85% or above, the iron ore concentrate grade exceeds 60%, magnetic separation tailings can be used as building materials, the process is simple, the cost is low, environment friendliness is achieved, the defects of a traditional process are overcome, and high-value utilization of solid waste is achieved.

The invention relates to a biomass hard carbon negative electrode material based on controllable pre-oxidation crosslinking as well as a preparation method and application of the biomass hard carbon negative electrode material. The method comprises: pretreating biomass with a metal salt structure directing agent; carrying out pre-oxidation crosslinking on the pretreated biomass precursor in an oxygen-enriched atmosphere; and carrying out stepped carbonization on the pre-oxidized cross-linked intermediate under the protection of an inert atmosphere to obtain the biomass hard carbon negative electrode material. The hard carbon material prepared by the invention has moderate specific surface area (5-50 m < 2 > / g), high closed porosity (gt, 40%) and expanded graphite interlamellar spacing (0.38-0.40 nm). Due to the unique structure, the high reversible capacity (gt, 330 mAh / g) and excellent cycling stability are realized when the biomass hard carbon material is used for the negative electrode of the sodium ion battery, and the problems of low reversible capacity and poor rate capability of the traditional biomass hard carbon are solved.

The invention discloses an efficient biological treatment device for landfill leachate by utilizing aerobic biological treatment, and relates to the technical field of biological treatment of garbage wastewater. The landfill leachate high-efficiency biological treatment device utilizing aerobic biological treatment comprises a reaction tank, the top of the reaction tank is fixedly connected with an impurity collecting tank, and the surface of the impurity collecting tank is fixedly connected with a filtering and separating box body. According to the high-efficiency biological treatment device for the landfill leachate by utilizing aerobic biological treatment, multiple groups of second spoilers and first spoilers are arranged on the surface of a first fixed block, and a second rotating shaft and a third rotating shaft are driven to rotate by starting a double-head motor, so that oxygen can be better diffused to each corner of the leachate; the condition of local oxygen deficit or oxygen enrichment is avoided, and it is ensured that aerobic microorganisms can obtain enough oxygen for metabolic activity in the whole treatment area, so that the treatment efficiency of the landfill leachate is improved.

The invention discloses a layered, zoned and differentiated CO2 injection system and method for a blast furnace, and belongs to the technical field of ferrous metallurgy low carbon. The system comprises a CO2 supply and distribution system, a tuyere area injection module, a furnace body middle-lower part injection module and a furnace body upper part injection module. And according to the temperature gradient and atmosphere layering characteristics in the blast furnace, a differential CO2 distribution proportion and a collaborative thermal compensation strategy are adopted. An oxygen-CH4 synergistic injection device is arranged in a tuyere area, and rapid conversion of CO2 is promoted by using a high-temperature strong reducing atmosphere; a biomass charcoal synergistic injection device and an angle-adjustable nozzle are arranged at the middle lower part of the furnace body, so that efficient gasification reaction is realized; and low-concentration CO2 mixed injection is adopted at the upper part of the furnace body, so that indirect reduction reaction is promoted. According to the invention, the CO2 conversion rate is 65-80%, the coke ratio is reduced by 15-25%, the consumption of CO2 per ton of iron is 260-90Nm < 3 >, the carbon emission is obviously reduced, and the ironmaking efficiency is improved.

The invention discloses a comprehensive recovery method of a low-grade multi-metal material. The comprehensive recovery method comprises the following steps: smelting the low-grade multi-metal material in a reinforced smelting furnace; smelting slag enters the echelon reduction volatilization furnace to be smelted; mixing soot obtained by smelting with the waste zinc electrolyte to obtain pulpified liquid; flue gas obtained by smelting and pulpified liquid are subjected to a contact reaction, and the reacted liquid is subjected to gas-liquid separation; carrying out contact reaction on the flue gas obtained after gas-liquid separation and the liquid again; extracting indium from the obtained lixivium by adopting P2O4; adding tannin into liquid after indium extraction to precipitate germanium; and adding alkali liquor into the germanium-deposited solution to neutralize and recover gallium. According to the method, the low-grade multi-metal material is sequentially subjected to echelon oxygen-enriched enhanced reaction smelting, continuous oxidation desulfurization leaching and scattered metal wet recovery by adopting an efficient smelting method, so that the energy consumption is reduced, the smelting efficiency is improved, the recovery rate of metals such as germanium is improved, the resource recovery rate is improved under the condition of relatively low energy consumption, and the economic benefit is increased. And the method has good social and economic benefits.

The invention relates to the technical field of metal smelting, in particular to a metal smelting temperature control method and system. The system comprises a temperature monitoring module, a gas analysis module, a thermodynamic simulation module and a dynamic regulation and control module, the thermodynamic simulation module sets a fitness function according to the Gibbs free energy value, and obtains the optimal temperature and oxygen potential through a particle swarm optimization algorithm; the dynamic regulation and control module is used for converting the theoretical optimal temperature of the thermodynamic model into precise operation, and efficient and stable control over the smelting temperature is achieved. According to the method, the reaction process in the furnace and the current optimal temperature and oxygen potential are accurately controlled on the basis of the Gibbs free energy value and the particle swarm optimization algorithm, the theoretical optimal temperature of a thermodynamic model is converted into precise operation through multi-PID cooperative control, and efficient and stable control over the antimony smelting temperature is achieved; and therefore, the problem that the oxygen-enriched smelting temperature is not accurately controlled is fundamentally solved, the extraction rate of metal is increased, and energy consumption is reduced.

The invention discloses an automatic control system and control method for oxygen-enriched combustion coal pyrolysis intake, and relates to the technical field of automatic control, the automatic control system comprises an oxygen intake control system, a carbon dioxide intake control system, a coal gas intake control system, a safety interlocking control system and a one-key parking interlocking system, the oxygen inlet control system, the carbon dioxide inlet control system and the coal gas inlet control system are all electrically connected with the safety interlocking control system, the safety interlocking control system is used for controlling the inlet states of oxygen, carbon dioxide and coal gas, and the one-key parking interlocking system is electrically connected with the safety interlocking control system. When the pressure of any one of oxygen-enriched gas, carbon dioxide and returned gas is insufficient, gas supply can be automatically and emergently closed, equipment ignition and explosion caused by excessive oxygen due to continuous gas supply are prevented, and meanwhile, nitrogen is automatically introduced after gas is cut off, so that the equipment is protected.

The invention discloses a moxibustion robot and a temperature control method. The device comprises a machine body and a mechanical arm, a fan, a filter unit and a smoke treatment box are arranged in the machine body, and a phototherapy module and a moxibustion module can be hung at the tail end of the mechanical arm; the tail end moxibustion module comprises a moxibustion shell, a primary filter element arranged in the moxibustion shell, a moxa stick arranged in the center of the primary filter element, a moxa stick combustion cavity located at the bottom of the primary filter element and matched with the primary filter element, an exhaust fan arranged in a primary exhaust port and an anti-scalding baffle, and a smoke conveying pipe connector can be connected to an air inlet of a fan. The device has the advantages that the device can be quickly disassembled and assembled in a fire-free state, flexible switching between manual hand holding and robot automatic moxibustion applying is achieved, and quick and safe butt joint is guaranteed in a buckle or slot mode; a dual-mode smoke removal structure is adopted, so that portable smoke removal and oxygenation can be completed by using an exhaust fan and a primary filter screen which are arranged at the tail end; in a large smoke amount occasion, more powerful two-stage smoke discharge and smell removal are realized.