387 results about "Oxygen enrichment" patented technology

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 relates to the technical field of oxygen-enriched equipment, which comprises an oxygen-enriched membrane assembly main body, a vertical gas injection part is arranged at one end, far away from a gas separation membrane assembly, of a gas connecting pipe, and a gas flow driving part drives the vertical gas injection part to operate. By arranging the vertical air injection part, when a second fan-shaped guide wheel rotates by 360 degrees under the operation of an airflow driving part, a semicircular air blocking plug shields a honeycomb flow guide plate in the process, and then part of compressed air penetrating through a flow dividing bent pipe enters an air exhaust bin through a one-way valve; then the semicircular air blocking plug loses the shielding of the honeycomb guide plate, and finally the compressed air in the air exhaust bin is exhausted into the gas separation membrane assembly, so that the compressed air vertically acts on one end of the gas separation membrane assembly, and the adsorption balance of each area in the gas separation membrane assembly is realized; the utilization rate of the gas separation membrane assembly is improved, and the flowability of the compressed air is enhanced by pushing the compressed air through the piston rod.

According to the system and the control method for improving the sinter quality of the sintering machine, the oxygen concentration in ignition combustion-supporting gas is actively and intelligently adjusted, and traditional passive adaptation is converted into active precise adjustment and control. And the mixing flow of the oxygen-enriched gas is dynamically adjusted according to monitored real-time data, so that the constant optimal ignition intensity is maintained. And then an optimized ignition system matched with oxygen-enriched ignition is designed, and generation of high-strength binding phase calcium ferrite is facilitated. And finally, through safety interlocking, when combustion-supporting air is abnormal, the oxygen content is too high and no coal gas is supplied, an oxygen-enriched pipeline stop valve needs to be closed, so that the system safety is guaranteed. The ignition uniformity and stability are improved, the ore return rate is effectively reduced, and a virtuous cycle is formed.

The invention is suitable for the technical field of automatic control, and provides an MPC heating furnace oxygen-enriched combustion control system parameter optimization method based on reinforcement learning, which comprises the following steps: step 1, production line data is acquired, and the acquisition of the production line data is mainly to acquire real data of an actual cement production control production line, including MV, OV and DV data; and step 2, obtaining a state space model, the obtaining of the state space model comprising establishing a model of converting a first-order transfer function into a state space, the MPC parameter adjustment is performed by using the prominent learning ability and adaptive ability of a reinforcement learning (RL) method, the dynamic adjustment according to the change of the system can be realized, and the control accuracy of the system is improved. And training the current oxygen-enriched combustion control algorithm according to the state information under the existing decision-making condition so as to output the expected furnace temperature, and evaluating the effectiveness of the control algorithm through the prepared evaluation standard.

The invention relates to the technical field of oxygen-enriched combustion safety and flammability limit prediction, and provides a flammability limit value prediction method and application, and the method comprises the steps: obtaining the initial parameters of a gas fuel in a mixed atmosphere of oxygen and carbon dioxide; simulating a combustion process by using an element reaction mechanism, and outputting a curve of component mole fractions changing along with time; the combustion enthalpy change rate under the target atmosphere and the virtual atmosphere is calculated based on the curve, and carbon dioxide in the virtual atmosphere is replaced with virtual gas which has the same thermophysical property but does not have chemical reactivity; respectively calculating combustion heat release, mixture heat absorption and heat radiation; and in combination with the enthalpy change rate and the energy balance equation, the combustible limit value is solved and determined through numerical iteration. By quantifying the chemical effect and thermophysical influence of carbon dioxide, the problem of insufficient precision caused by neglecting the participation of carbon dioxide in reaction and unique thermal property in the oxygen-enriched combustion environment in the existing model is solved, and the method is suitable for the safety design of a combustion system.

The invention discloses a megawatt pressurized bubbling fluidized bed oxygen-enriched combustion test platform and a combustion method. The platform comprises a feeding system, a pressure swing adsorption oxygen production and gas inlet system, a deslagging system, an oxygen-enriched combustion reaction system and a flue gas and fly ash sampling treatment system. The feeding system adopts a spiral and star-shaped double-path independent pressure feeding unit, and is provided with a multi-stage stock bin, a drying device and a pipeline cooling structure, so that pressurized continuous feeding is realized, and tempering is prevented; the pressure swing adsorption oxygen generation and gas inlet system generates oxygen-enriched gas through a PSA technology, and the oxygen-enriched gas is mixed with CO2 to form a graded oxygen-enriched atmosphere; according to the oxygen-enriched combustion reaction system, accurate temperature control is achieved through an air distribution plate, a reducer pipe and a partition heat exchange device, and generation of NOx is restrained; the problems of unstable fuel supply, unreliable deslagging, low combustion efficiency, difficulty in CO2 enrichment and the like under the high-pressure oxygen-enriched combustion condition in the prior art can be effectively solved.

The invention relates to the technical field of lithium ion batteries, in particular to a nickel cobalt lithium manganate positive electrode material and a preparation method thereof. According to the invention, the technical problems of poor cycle performance and low specific capacity of the existing nickel cobalt lithium manganate positive electrode material are solved. The preparation method comprises the following steps: synthesizing precursor powder by adopting a coprecipitation process; then carrying out high-shear mixing on the precursor, lithium hydroxide, nano niobium oxide and magnesium fluoride; after the mixed material is subjected to pre-oxidation and high-temperature oxygen-enriched gradient sintering, a gradient reduction etching process is adopted in the cooling stage, and strong wind quenching is matched for surface shaping; and finally, carrying out air jet pulverization and demagnetization to obtain the nickel cobalt lithium manganate positive electrode material. According to the method, lattice respiration stress is effectively dissipated by constructing a radial ordered structure, a bulk phase structure is stabilized through multi-element synergistic doping, interfacial ion transport kinetics is optimized through reduction-induced surface oxygen vacancies and a lattice distortion layer, and the synergistic strategy ensures high stability of the material structure and meanwhile, the material structure has a good application prospect. And the de-intercalation efficiency of the active lithium is greatly improved.

This invention belongs to the field of peak-shaving technology for thermal power units, specifically a deep peak-shaving method for thermal power units that combines electrolytic hydrogen production with ammonia synthesis and energy storage. It integrates an electrolytic hydrogen production with ammonia synthesis and energy storage system, an energy comprehensive utilization system, and a collaborative control system to form a closed-loop peak-shaving system: during off-peak periods, excess electricity from the thermal power unit is collected; during peak periods, the stored ammonia is used to supplement the unit's energy through coal-ammonia co-firing, while oxygen is utilized for oxygen-enriched combustion to enhance peak-shaving and stable combustion capabilities. The synthesized ammonia can also replace purchased ammonia for flue gas denitrification. Through the collaborative control system, the operation of each link is coordinated, achieving efficient energy conversion and precise control. This invention significantly improves the deep peak-shaving and peak-response capabilities of thermal power units, substantially reduces carbon and pollutant emissions, optimizes energy utilization efficiency, extends equipment lifespan, and provides strong support for the green transformation of coal-fired power and the stable operation of new power systems.

The invention discloses a monovalent alkali metal ion doped iron-based perovskite type ceramic membrane as well as a preparation method and application thereof, and belongs to the technical field of mixed conductor oxygen permeation ceramic membrane materials. The method comprises the following steps: (1) synthesizing layered rock salt oxide M1 by adopting an EDTA-CA (Ethylene Diamine Tetraacetic Acid-Carboxylic Acid) sol-gel method; (2) mixing the M1 with other metal carbonate or oxide according to the stoichiometric ratio of the target perovskite oxide M2, and preparing a solid precursor M1 + M2 through a solid-phase reaction method; and (3) sintering the precursor into a compact ceramic membrane by using a static pressure-roasting method. According to the invention, the problem that monovalent alkali metal ions are easy to volatilize in a high-temperature solid-phase reaction is effectively solved through a process of stabilizing the alkali metal at a low temperature and then forming a film at a high temperature, and the monovalent alkali metal ions are successfully doped into iron-based perovskite crystal lattices. The prepared ceramic membrane has the advantages that the oxygen permeation flux is obviously improved while the good structural stability is maintained, and the ceramic membrane is particularly suitable for oxygen separation in an oxygen-enriched combustion process.

This application relates to the field of waste treatment technology, and more specifically, to a power generation device based on low-temperature magnetic pyrolysis of waste, comprising: at least one pyrolysis unit for thermally decomposing waste; a gas conveying pipeline for collecting and conveying the gas generated in each pyrolysis unit to a combustion chamber; a combustion chamber for combustion using combustible gas as a heat source; a direct-fired generator system disposed above the combustion chamber for using the high-temperature gas in the combustion chamber as a power source to drive the generator to rotate and generate electricity; and an oxygen-enriched gas supply device for supplying oxygen-enriched gas to the combustion chamber to ensure complete combustion of the combustible gas.

The invention discloses an energy system integrating water electrolysis hydrogen production and a hydrogen gas turbine, which comprises an oxygen-enriched preparation membrane separation module for processing air and outputting oxygen-enriched gas, a wind and light prediction calculation module for analyzing wind speed and illumination data to generate an electric energy output curve, and an electrolysis power distribution module for distributing power to a water electrolysis hydrogen production unit according to the electric energy output curve. The oxygen-enriched combustion simulation module calculates combustion field distribution. The coupling driving control module collects hydrogen yield and combustion efficiency data and adjusts the rotating speed of the hydrogen gas turbine; the parameter monitoring feedback module collects parameters of each module and transmits deviation values. Meanwhile, oxygen-enriched preparation, power distribution, wind and light prediction and combustion simulation, wind and light prediction calculation and oxygen-enriched combustion simulation are optimized by the system through a specific model and algorithm, the coupling driving control module further comprises a plurality of functional units, each module is started according to six steps during operation, and the system ensures stable combustion efficiency of the hydrogen gas turbine and is high in reliability. And finally, the comprehensive performance of energy utilization in the plateau anoxic environment is remarkably improved.

The invention provides a high-Mach-number boron powder ramjet engine based on air fluidization. The high-Mach-number boron powder ramjet engine comprises a boron powder conveying module and a kerosene conveying module. The boron powder conveying module can convey boron powder to the combustion part; the kerosene conveying module can convey kerosene to the combustion part; and the combustion part is provided with a stable combustion support plate. The problems of boron powder conveying and ignition stable combustion of the high-Mach-number boron powder ramjet engine based on air fluidization are solved, and incoming flow air is directly used as driving gas and fluidizing gas to fluidize boron powder fuel; kerosene is combusted, and injected fluidized air generates a high-temperature low-speed oxygen-enriched area behind the stable combustion support plate, so that removal of an oxide layer on the surface of the boron powder fuel is accelerated, and the combustion effect of the boron powder fuel is improved. The problem that in the prior art, a boron powder fuel conveying system is too complex to be integrated with an engine system is solved, the defects that reliable ignition and stable combustion are difficult to achieve due to the poor ignition combustion characteristic of boron powder fuel are overcome, and high integration of the boron powder fuel conveying system and the engine and ignition stable combustion of the boron powder fuel are achieved.

The application belongs to the technical field of solid waste resource utilization, and specifically discloses a method and device for preparing silicon-calcium aggregate, sulfuric acid and CO2 by phosphogypsum oxygen-rich high-temperature decomposition. The method uses the adsorption method to obtain pure nitrogen products and oxygen-rich combustion-supporting gas, and provides different reaction temperatures and reaction atmospheres for different reaction stages of the rotary kiln reactor through the multi-point combustion mode, thereby ensuring the controllable high-temperature environment and atmosphere in the kiln. The method improves the combustion efficiency, greatly reduces the amount of flue gas after decomposition, effectively improves the concentration of SO2 in the flue gas and the efficiency of the subsequent sulfuric acid preparation system, and realizes CO2 emission reduction and resource utilization by using the CO2-rich tail gas of the sulfuric acid preparation system for adsorption recovery. The application also provides a device for realizing the method, which combines gas adsorption, oxygen-rich combustion and rotary kiln multi-point combustion equipment, thereby ensuring the effective realization of the process.

The invention discloses a low-temperature synthesis method for realizing an iron-based perovskite type oxygen-permeable ceramic membrane based on intermediate decomposition driving and the obtained membrane, and belongs to the technical field of ceramic membrane materials. The method comprises the following steps: firstly, preparing an iron-based perovskite oxide P1; mixing the P1 with a fluorine-containing compound, and carrying out fluorination treatment in an inert atmosphere to obtain an iron-based perovskite oxyfluoride intermediate P2; uniformly mixing P1 and P2 in proportion to obtain a solid precursor; and finally, preparing the ceramic diaphragm M through a static pressure-roasting method. According to the method provided by the invention, the defects in the prior art can be improved, and on the premise of ensuring that the high density and chemical stability of the iron-based perovskite type oxygen-permeable ceramic membrane are not influenced, the problem that the sintering temperature of the iron-based perovskite type oxygen-permeable ceramic membrane is too high is obviously improved, and the oxygen permeability of the iron-based perovskite type oxygen-permeable ceramic membrane is effectively improved; the commercialized application of the iron-based perovskite type oxygen-permeable ceramic membrane material in an oxygen-enriched combustion process is further promoted.

The invention relates to the technical field of blast furnace ironmaking, in particular to an unfired pulverized coal generation quantity calculation method based on blast furnace operation parameters. The method specifically comprises the following steps: S1, acquiring a plurality of key operation parameters of the blast furnace; s2, inputting the plurality of key operation parameters into a pre-constructed unfired pulverized coal amount prediction model; the prediction model is a mathematical model reflecting a nonlinear relation between the key operation parameters and the unburned pulverized coal amount; s3, outputting a predicted value of the unburned pulverized coal amount of the blast furnace by the prediction model; wherein the plurality of key operation parameters at least comprise the temperature of blown hot air, the oxygen enrichment rate of the blown hot air, the strength after the thermal reaction of the charged coke, the grade of charged raw material iron, the fixed carbon content of the mixed pulverized coal, the volatile component content of the mixed pulverized coal, the fineness of the mixed pulverized coal and the coal injection quantity per ton of iron. Existing operation data can be fully utilized, and the quantity of unburned pulverized coal can be rapidly and accurately analyzed.

The invention discloses a blast furnace smelting method for increasing yield and reducing consumption based on a high slag ratio condition, and belongs to the technical field of blast furnace smelting. According to the method, the proportion of sintered ore, magnesian pellet ore and lump ore is optimized, specific stock bin management and a small-batch inferior ore fixed-bin feeding mode are adopted, furnace entering components are stabilized, the air volume, the air speed, the coal ratio, the pressure difference and top pressure are regulated and controlled, oxygen-enriched hot air is blown in, and slag iron discharge is promoted in a zero-interval tapping mode. According to the method, high-efficiency and stable smooth operation can be realized under the conditions of low grade and high slag ratio, the yield is obviously improved, and the fuel consumption is reduced.

The present application belongs to the technical field of energy saving and consumption reduction of titanium dioxide production, and particularly relates to a method for energy saving and pollution reduction in the calcination process of sulfuric acid method titanium dioxide. The present application realizes the cascade utilization of high-temperature to medium-low-temperature waste heat through the integrated scheme of "preheating and quality improvement + oxygen-rich calcination + tail gas synergistic desulfurization and denitrification + resource utilization of by-products", that is, the calcination tail gas (1000-1100℃) is first used to generate steam for production through a waste heat boiler, and then is used for preheating and drying metatitanic acid after being cooled, thereby realizing the cascade utilization of high-temperature to medium-low-temperature waste heat, and simultaneously, the oxygen-rich combustion improves the fuel efficiency, the natural gas combustion is more sufficient, the energy consumption per unit product is reduced by 30-40%, and the ammonia method is used to simultaneously remove SO2 and NO x in a single reactor, the desulfurization efficiency is greater than or equal to 95%, the denitrification efficiency is greater than or equal to 85%, the concentration of dust in the tail gas after being removed by a bag filter is less than or equal to 10 mg / Nm3 for emission, the unity of environmental benefits and economic benefits is realized, and a new path is provided for the green upgrading of the sulfuric acid method titanium dioxide industry.

The application belongs to the technical field of new energy materials and electrochemical catalysis, and provides an oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst, a preparation method and application thereof. A foam nickel is used as a working electrode, a platinum sheet is used as a counter electrode, and a Hg / HgO electrode is used as a reference electrode. In an electrolyte solution containing a nickel salt and a cerium salt, electrodeposition is performed to obtain a precursor. The precursor includes the foam nickel and cerium and nickel deposited on the foam nickel. The precursor is soaked in a tannic acid solution to obtain an impregnated precursor. Ammonium hypophosphite is placed upstream, and the impregnated precursor placed downstream is subjected to phosphorus nitride doping treatment to obtain the oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst. The obtained oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst exhibits excellent electrocatalytic performance for methanol oxidation reaction (MOR) and can be used as a high-efficiency anode catalyst for a direct methanol fuel cell (DMFC).

This invention relates to a system that purifies and improves air quality by utilizing a microalgal bioreactor with integrated LED lighting to absorb pollutants, eliminate pathogens, and release oxygen-enriched air, while providing a sustainable and scalable solution to address environmental and public health challenges. The system includes a column (1) containing water and microalgae that produces oxygen by absorbing pollutant gases and pathogens from the air, a lighting system (2) consisting of a plurality of LEDs positioned in the column (1), providing the light source for the photosynthesis of microalgae, a pump (3) configured to suck air from the surrounding environment and introduce it into the column where the air bubbles come into direct contact with the microalgae, a photocatalytic filtration system (4) placed at the air inlet, configured to remove particulates, viruses, bacteria and other impurities before the air is treated in the column (1), a two-phase separator (5) configured to collect the microalgal biomass produced, separating part of the process water and reintroducing it into the internal cycle of the column (1), a control panel (8) that monitors microalgae concentration, water quality and pH, and photosynthetic process efficiency.

The application discloses a cement-chemicals co-production system and a control method thereof, and belongs to the technical field of carbon emission reduction and resource utilization in the cement industry. The system comprises a water electrolysis hydrogen production unit, a microwave-assisted hydrogen calcination unit, a cement clinker sintering unit, a synthetic gas purification unit, a synthetic gas proportioning unit, a chemical synthesis unit, a waste heat recovery unit and an automatic control and data monitoring unit. The microwave-assisted hydrogen calcination technology is used to decompose calcium carbonate into CO synthesis gas, oxygen by-product of water electrolysis is used for oxygen-enriched combustion, combined with accurate proportioning of synthetic gas and DCS and artificial intelligence collaborative control, the collaborative production of cement clinker and high-value chemicals is realized. The application reduces the carbon emission of the system by more than 70% compared with the traditional process, reduces the comprehensive energy consumption by more than 30%, the thermal efficiency is greater than or equal to 85%, the synthetic gas conversion rate is greater than or equal to 80%, and the carbon resource utilization rate and production stability are significantly improved, and the application has outstanding economic and environmental benefits.

This invention provides a method for improving the desulfurization capacity of high-titanium slag using an artificial intelligence model, applicable to the smelting of high-vanadium-titanium ore in blast furnaces. The method includes: controlling the MgO content in the slag to 8.0%-9.5% by weight, the binary basicity of the slag to 1.10-1.17, and the Al2O3 content ≤14.5%, while maintaining the MgO to Al2O3 ratio in the slag at 0.60-0.65; maintaining the physical heat of molten iron ≥1440℃; controlling the blast furnace inlet blast temperature ≥1200℃; controlling the sulfur load in the blast furnace inlet to 4.5-5.5 kg, and controlling the proportion of pellets in the blast furnace inlet to 46%-50%; and constructing a dynamic adjustment model based on predicted sulfur load increments and predicted titanium reduction increments, so that the oxygen enrichment rate is dynamically adjusted within a first threshold range, and the blast furnace coal ratio is dynamically adjusted within a second threshold range. This invention can dynamically adjust the oxygen enrichment rate and blast furnace coal ratio according to the sulfur load increment and titanium reduction increment, thereby improving the desulfurization capacity of high-titanium slag.

The invention discloses a process simulation and parameter optimization method and device for an Isa furnace, and relates to the technical field of Isa furnace simulation, and the method comprises the steps: constructing a three-dimensional geometric model of the Isa furnace based on obtained geometric parameters of the Isa furnace; the method comprises the following steps: constructing a multi-physics field coupling model based on a multi-physics field coupling mechanism of gas-slag-sulfonium three-phase flow and oxygen-enriched diffusion in an Isa furnace; inputting the multi-physical field coupling model and the preset physical property parameters of the gas phase, the slag phase and the sulfonium phase into ANSYS Fluent software, and obtaining evaluation index data under different working conditions through the ANSYS Fluent software; according to the melt stirring efficiency-splashing control method, the injection speed and the oxygen enrichment concentration matched with the Isa furnace can be selected, and the purposes of balancing the productivity of the Isa furnace and achieving stable operation are achieved.

The present application relates to the technical field of metallurgical production, in particular to a method for reducing the mixing amount of coke oven gas in lime double-D kiln by oxygen-enriched combustion, specifically, oxygen injection guns and oxygen-enriched valve groups are installed in the air pipeline of the lime double-D kiln to control the oxygen flow, the lime double-D kiln is started, mixed gas containing coke oven gas and converter gas is introduced, the oxygen-enriched valve groups are then started, the oxygen enrichment degree is set from 1% and gradually increased, and the highest oxygen enrichment degree does not exceed 9%, the air-fuel ratio and the excess air coefficient are simultaneously reduced, and the mixed gas flow is reduced. By the method of oxygen-enriched combustion, the oxygen content in the calcination combustion-supporting air is increased, the combustion efficiency is improved, the combustion temperature is optimized, the air demand and the combustion product generation amount are reduced, the heat taken away by the flue gas is reduced, thereby the heat loss of exhaust gas can be reduced, the theoretical combustion temperature and the furnace gas radiation capacity can be improved, and the energy consumption can be greatly reduced.

The utility model discloses a micro-pressure oxygen-enriched cabin environment temperature regulation system, belonging to the technical field of special environment control equipment, which includes a control center module, a temperature sensing module, an actuator module and a safety protection module. The control center module is electrically connected to the temperature sensing module. The safety protection module is installed on the actuator module, and the safety protection module and the actuator module are respectively electrically connected to the control center module. Under the conditions of maintaining micro-pressure (usually 1.1 to 1.3 atmospheres) and oxygen enrichment (oxygen concentration of 21% to 30%), it ensures that the temperature inside the cabin is stable within a comfortable range, and the temperature can be set arbitrarily, usually 20 to 26 °C. It automatically controls the start and stop of the environment temperature regulation system according to the change of temperature, realizes the linkage control of the micro-pressure oxygen-enriched cabin and the environment temperature regulation system, and is convenient to operate and use.

The invention discloses a gas turbine unit flue gas trapping method based on oxygen-enriched combustion. The method comprises the steps that an oxygen-enriched preparation unit, a gas turbine unit, a waste heat recovery unit and a low-temperature rectification carbon trapping unit are arranged; air enters the oxygen-enriched preparation module to prepare mixed gas rich in oxygen; fully mixing the mixed gas with natural gas produced by a platform and part of back-doped CO2 returned from a low-temperature rectification carbon capture unit according to a controlled proportion, and injecting the mixed gas into a gas turbine unit for oxygen-enriched combustion to drive a turbine to expand to do work so as to discharge high-temperature flue gas; the high-temperature flue gas enters a waste heat recovery unit, heat energy in the high-temperature flue gas is recovered through the waste heat recovery unit, and high-concentration CO2 flue gas is obtained; the high-concentration CO2 flue gas enters a fractionating tower of the low-temperature rectification carbon capture unit, and CO2 in the high-concentration CO2 flue gas is liquefied and discharged by utilizing the boiling point difference of all components in the flue gas. According to the invention, the problems of high energy consumption, high cost and large occupied area of equipment in a conventional decarbonization device in the prior art are solved.

The invention discloses a furnace temperature control method and device for a blast furnace in a heat deficit state, and the furnace temperature control method comprises the following steps: obtaining current operation parameters of the blast furnace, the operation parameters at least comprising air volume, oxygen enrichment rate, air temperature and blast humidity; determining a theoretical combustion temperature under the current operating condition according to a first calculation model based on the operating parameters; on the basis of the relation between coal ratio changes and hearth heat balance, net heat earnings corresponding to different coal ratios are calculated through a second calculation model according to the theoretical combustion temperature, the amount of combusted coke in front of a ton iron tuyere, the coal-coke replacement ratio coefficient, the influence coefficient of the coal ratios on the theoretical combustion temperature and the reference temperature; and adjusting the coal ratio of actual coal injection to a target coal ratio which enables the net heat income to be a positive value. According to the furnace temperature control method provided by the invention, the second calculation model of the net heat income is established and applied, so that the heat supplement mode of the blast furnace in the heat deficiency state is fundamentally changed.

The utility model discloses an ammonia gas stable combustion device which comprises a flame generator, an ammonia gas adding device and a pure oxygen adding device, the flame generator enables ignition fuel and oxygen to be mixed and combusted to generate flames, the ammonia gas adding device is used for adding ammonia gas to the outer side of the flames, the pure oxygen adding device is used for adding pure oxygen to the outer side of the ammonia gas, and the ammonia gas is stably combusted in a high-temperature area of the flames under the oxygen-enriched condition. According to the device, ignition fuel and oxygen are mixed and combusted to generate flames, the temperature of a high-temperature area of the flames reaches 2000 DEG C, ammonia gas and pure oxygen are heated and ignited, and the ammonia gas is high in combustion speed and not prone to flameout under the oxygen-enriched working condition, so that the ammonia gas can be stably combusted in the high-temperature area of the flames under the oxygen-enriched condition.

The invention discloses an ultralow-load stable combustion system and method for a pulverized coal fired boiler. The ultralow-load stable combustion system comprises a pulverized coal concentration separator device, an oxygen preparation device, an oxygen storage tank, a heater, a thick pulverized coal burner, a thin pulverized coal burner and an oxygen-enriched combustion-supporting air nozzle. An inlet of the pulverized coal concentration separator device is connected with a primary air pulverized coal feeding pipeline, a thick pulverized coal outlet of the pulverized coal concentration separator device is connected with a thick pulverized coal burner through a first pipeline, and a thin pulverized coal outlet is connected with a thin pulverized coal burner through a second pipeline. The oxygen preparation device is connected with the oxygen storage tank, the oxygen storage tank is connected with the heater, and the heater is connected with the oxygen-enriched combustion-supporting air nozzle arranged above the dense pulverized coal burner. The method comprises the following steps: separating primary air into thick pulverized coal and thin pulverized coal; the thick pulverized coal is fed into a thick pulverized coal burner, and the thin pulverized coal is fed into a thin pulverized coal burner; preparing high-concentration oxygen, heating the high-concentration oxygen, and spraying the heated high-concentration oxygen to the upper part of the And stable combustion is maintained when the boiler load is lower than 20%. Continuous and stable combustion of the boiler under the load of 20% or below is achieved.

The disclosure relates to the technical field of cement manufacturing, and specifically relates to a calcination system and method for low-carbon cement clinker. The calcination system includes: a kaolin calcination assembly including a preheater and a decomposition furnace, where the preheater is provided with a multi-stage cyclone cylinder; the preheater is provided with a feed port and a discharge port; the decomposition furnace is provided with a fuel adding port and a raw material inlet; the raw material inlet is connected to the discharge port; activated kaolin is generated by the decomposition furnace through calcination; and the decomposition furnace has a calcination temperature of 700° C. to 850° C. and calcination time of 0 h to 1.5 h, and a calcination atmosphere in the decomposition furnace is an oxygen-enriched atmosphere or a CO reducing atmosphere; and a cement calcination assembly configured to generate cement clinker through calcination, where the activated kaolin is added to a discharge side of the cement calcination assembly according to a predetermined ratio of the activated kaolin to the cement clinker. Use of carbon-containing raw materials in clinker production and carbon emissions of clinker are reduced, and a hydration rate of the cement clinker is adjusted.

The invention relates to the technical field of sludge treatment, in particular to high-activity papermaking sludge incineration ash as well as a preparation method and application thereof. The preparation method of the high-activity paper mill sludge incineration ash comprises the following steps: S1, carrying out sectional type hot air drying on dewatered paper mill sludge, so that the water content of the sludge is reduced to 15-25%; s2, feeding the dried sludge into a circulating fluidized bed incinerator, and pyrolyzing the papermaking sludge at 450-550 DEG C under an anoxic condition; carrying out activated combustion on the pyrolysis product under the conditions of oxygen enrichment and superheated steam injection at the temperature of 650-750 DEG C; then carrying out short-time stabilizing treatment on ash particles generated by activated combustion at 850-950 DEG C, and quenching; and S3, the cooled ash is ground, and the high-activity paper mill sludge incineration ash is obtained. The high-water-absorption material is prepared from the sludge incineration ash, and efficient treatment and resource utilization of dredged soil, river and lake bottom mud and engineering slurry are achieved.