129 results about "Oxygen enrichment" patented technology

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.

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 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 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.

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 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 utility model discloses a kind of low-nitrogen gas combustor suitable for multiple working conditions, including assembly cylinder, outer fire basin, center fire basin, lifting mechanism, inner layer gas gun, outer layer gas gun and oxygen gun.Assembling cylinder is fixed on heating furnace furnace bottom plate, and its outer wall is connected with the ventilation pipe of air register.Outer fire basin is fixed to the top end of assembly cylinder, and center fire basin can be axially lifted, driven by lifting mechanism.Inner and outer layer gas gun is annular array distribution in the inside and outside of outer fire basin, and oxygen gun is arranged in the inside of center fire basin.By adjusting the height of center fire basin, air combustion, oxygen-enriched combustion and pure oxygen combustion mode can be switched, realize combustion air grading and gas segmented combustion, effectively reduce flame temperature, inhibit nitrogen oxide generation.The combustor is stable in structure, strong in adaptability, and has the advantages of efficient combustion and environmental protection.

The application relates to the technical field of metallurgical process control, in particular to a method for predicting the viscosity of smelting slag of oxidized-copper sulfide concentrate and application thereof. Based on the mass of specific raw material components in the slag of the to-be-detected oxidized-copper sulfide concentrate after oxygen-enriched top-blown smelting, the reference viscosity value of the slag is calculated by combining the pre-set smelting temperature, the pre-factor and the viscous activation energy; then the volume fraction of Fe3O4 obtained after oxidation is calculated according to the mass of the specific raw material components of iron; the predicted viscosity value of the slag is calculated by substituting the volume fraction of Fe3O4 and the reference viscosity value into an expression, which provides a basis for subsequent regulation and control of the smelting process based on the predicted viscosity value; and the problem of how to predict the viscosity of the slag of the oxidized-copper sulfide concentrate to optimize the smelting process is solved.

The application provides a kind of double-phase fluidized roasting method, the roasting furnace body of the method is straight cylinder cavity, and the sealing cavity surrounded by the pouring dome and the heat preservation structure independently arranged in the furnace top;The feeding port and the discharge port of the roasting furnace are opened on the same side of the furnace body, and the feeding port is located above the discharge port;The feeding port is equipped with a drum thrower;The bottom of the roasting furnace is provided with a plurality of dispersedly arranged heat removal devices;The flue of the roasting furnace is provided with an air supplement device;During the dense phase oxidation desulfurization process of raw materials, the heat removal device is uniformly heat exchanged to stabilize the bed temperature, and the high temperature steam discharged by the heat removal device is used as the medium for maintaining the constant temperature of the sealing cavity;The air supplement device is used to supplement oxygen-rich air into the flue to form a dilute phase secondary roasting zone.The furnace top of the application uses a heat preservation structure independent of the dome, prolonging the service life of the furnace top;The feeding port is arranged above the discharge port on the same side, and the raw material into the furnace hinders the smoke dust particles in the upward flue gas, reducing the dust content of the flue gas.

The utility model discloses a metal material accelerated corrosion test device, include: box (1), be provided with electric control system (12) on the box, water collecting tank (2), set up in the lower part of box (1), sample stage (9), set up above water collecting tank (2), electrolyte water tank (6), set up above sample stage (9), have liquid outlet pipeline, be provided with throttle valve (16) and liquid outlet ware (22) on the liquid outlet pipeline, circulating water pump (3), set up between water collecting tank (2) and electrolyte water tank (6), electrode loop, including anode wire (19), cathode wire (20), graphite electrode (21) and direct current power supply, the utility model discloses through temperature control, oxygen enrichment, anodic polarization etc. means, carry out acceleration under the condition of low conductivity, and integrate ultraviolet and temperature and humidity control, realize to highland environment carries out simulation accelerated corrosion test to provide the basis for the selection and evaluation of material.

This invention relates to a method for the reverse-sequence dual-temperature zone oxygen-enriched oxidation separation and recovery of antimony and tellurium from a lead-bismuth alloy. The method involves melting the alloy and controlling the temperature within the range of 580-600℃, then introducing oxygen-enriched compressed air into the melt for the first stage of oxidation. The system temperature is then adjusted to 510-550℃, and oxygen-enriched air is continuously introduced for the second stage of oxidation. A composite oxidant is added in batches to the resulting low-antimony molten alloy to obtain a first-grade lead-bismuth alloy. The obtained conversion slag is pretreated by ball milling and then leached with sodium hydroxide solution. After solid-liquid separation, leaching residue and conversion liquid are obtained separately. The conversion liquid undergoes subsequent purification and electrowinning processes to finally produce #1 tellurium ingots. This invention, through reverse-sequence dual-temperature zone oxygen-enriched oxidation control, achieves preferential volatilization and recovery of antimony while inhibiting excessive oxidation of lead and bismuth, and simultaneously allows residual antimony and tellurium to enter the conversion slag. It has significant advantages such as a compact process flow, high metal recovery rate, strong operational controllability, and good environmental compatibility.

The present application relates to the field of solar energy and solid oxide cell technology, and provides a solar multi-generation system based on RSOC and a control method, the system comprising: an RSOC stack module, a photovoltaic device, a first molten salt system and a second molten salt system; the RSOC stack module is in power generation mode SOFC and electrolytic hydrogen production mode PV-SOEC-PTC respectively; high-temperature oxygen-enriched air at the outlet of the RSOC stack module heats air in an air preheater after passing through a combustor, so as to realize heat energy recycling; during operation, high-temperature molten salt in the high-temperature molten salt tank of the second molten salt system enters the RSOC stack module to release heat, so as to maintain the stable working temperature of the stack; the heat-exchanged molten salt is transported to the low-temperature molten salt tank for storage, and at the same time, the first molten salt system is synchronously operated to complete the preheating of water. The high-temperature and low-temperature molten salt tanks of the second molten salt system realize bidirectional heat storage temperature control, and cooperate with the solar molten salt preheating of the first molten salt system, so as to realize efficient switching and stable and controllable temperature of SOFC power generation and SOEC electrolysis modes.

The present application belongs to the field of metallurgy, and particularly relates to a method for stopping blast furnace and lowering material surface, comprising the following contents: (1) adjusting the furnace operation before stopping; (2) adjusting the stopping material and optimizing the material distribution matrix; (3) pre-turbine, replacing the tuyere small sleeve and controlling the furnace top temperature; (4) stopping and lowering the material surface: 1. increasing the ratio of top pressure and hot blast pressure: the ratio of top pressure and hot blast pressure is increased to 0.68-0.75; 2. taking different degrees of control on the top temperature when the material surface is at different positions of the blast furnace: (1) when the material surface is above 1 / 2 of the bosh, the top temperature is controlled at 320-350 DEG C; (2) when the material surface is below 1 / 2 of the bosh, the top temperature is controlled at 280-300 DEG C; 3. spraying coal powder, oxygen enrichment, increasing and continuously maintaining the nitrogen gas injection of the tuyere after stopping the coal injection; 4. controlling the gas composition; 5. controlling the [Si] of the molten iron. The method can avoid the blast furnace explosion in the process of stopping and lowering the material surface, prolong the coal gas recovery time, shorten the time of stopping and lowering the material surface, save the coke consumption and reduce the cost.

The present application relates to a kind of high pellet ratio low slag quantity blast furnace ultra-low silicon stable smelting control method, belong to blast furnace ironmaking low-carbon low-silicon smelting technical field.The method, core is to establish a set of silicon distribution quantitative prediction model, the model is by calculating the silicon input of raw fuel, slag iron silicon distribution coefficient and silicon increment of molten iron, realize the accurate prediction to molten iron silicon content.Based on model prediction, blast furnace operation is regulated, key control parameters include: the proportion of pellet is controlled at 60%~68%, slag amount is controlled at 250~270 kg / t, the binary basicity of slag is controlled at 1.15±0.03, and the softening zone is positioned and stabilized in the middle and lower part of shaft (thickness ≤600mm).Finally, by the coupling adjustment of air volume and oxygen enrichment rate, the silicon content of molten iron is stably controlled in the narrow range of 0.18%~0.20%, and the fluctuation is not more than ±0.02%, so as to realize the long-term smooth running and ultra-low silicon stable smelting of blast furnace under the condition of high pellet ratio and low slag amount.

A method and apparatus for obtaining pressurized nitrogen by cryogenic separation of air in a distillation column system. The distillation column system comprises a high-pressure column (4), a low-pressure column (6), a main condenser (5), and a top condenser (7) of the low-pressure column. The evaporation space of the top condenser (7) is in the form of a forced-flow evaporator. The high-pressure column (4) has a baffle section (8) arranged directly above the point where the feed air (3) is introduced, and has 1 to 5 theoretical or actual plates. The oxygen-enriched liquid stream (11) introduced into the low-pressure column (6) is withdrawn from the high-pressure column (4) above the baffle section (8). The purified stream (9A) is withdrawn below the baffle section (8) and removed from the distillation column system (9B). The gaseous nitrogen streams (26A, 26B) are heated in a counter-current subcooler (12) by indirect heat exchange with the oxygen-enriched liquid stream (11) from the high-pressure column (4) before being heated in the main heat exchanger (2).

The application discloses a coal-fired power generation system coupled with SOEC and a deep peak regulation operation method of the unit. The depth of peak regulation of the coal-fired unit is limited by the minimum stable combustion load of the boiler, and the cylinder efficiency of the steam turbine side is obviously reduced under low load, and the operation energy consumption sharply rises. In order to solve the above problems, the application increases the working medium flow of the high-pressure cylinder and the medium-pressure cylinder and improves the cylinder efficiency of the steam turbine by adopting backheating steam extraction throttling when the coal-fired power generation unit is operated under low load; the molten salt heat storage and the solid oxide electrolysis cell SOEC are coupled, the additional electric energy generated by the backflow working medium is converted into chemical energy by the SOEC, and the oxygen-enriched air generated by electrolysis is recovered to the boiler, so that the combustion stability of the boiler under low load is improved; the product waste heat and the molten salt heat storage are used to heat the boiler feed water, the insufficient feed water temperature caused by steam extraction throttling is made up, and the SCR denitration efficiency under low load is ensured. The application realizes flexible, efficient, safe and clean collaborative improvement of the deep peak regulation process of the coal-fired power generation unit by reasonably designing the system configuration.

This invention belongs to the field of blast furnace carbon emission reduction technology and discloses a blast furnace carbon emission reduction ironmaking system and method, including: oxygen-enriched ironmaking with the participation of a mixed reaction gas with high CO2 concentration. Due to the use of CO2 in the blast furnace blast and pulverized coal carrier gas, the oxygen enrichment rate is increased, and the amount of biochar is increased, thereby improving the smelting intensity of the blast furnace, increasing the proportion of pulverized coal replacing coke (increasing the coal ratio and decreasing the coke ratio), reducing ironmaking costs, and reducing carbon emissions. Furthermore, due to the use of CO2 injection and oxygen-enriched ironmaking operations, the amount of air incorporated into the mixed reaction gas is reduced, increasing the concentration of CO and CO2 in the blast furnace gas, which is beneficial for subsequent capture, separation, purification, and resource utilization of different components in the blast furnace gas.

The present application relates to a kind of compound reinforced smelting furnaces of staggered top blowing and double side blowing synergistic nonlinear regulation, including furnace body, side blowing lance and top blowing lance.Two rows of side blowing porous channel lance are symmetrically arranged in slag layer of molten pool, and oxygen, oxygen-enriched air or fuel mixture is introduced to form transverse disturbance airflow to drive molten pool main circulation.Top of the furnace is provided with staggered interval arrangement Laval structure top blowing lance and top blowing lance with cyclone.Laval lance is located above slag layer, and provides high-speed blowing to enhance reaction driving force;Rotary flow spray gun is immersed in the upper part of slag layer, and rotary airflow is generated by multi-stage cyclone to improve mixing efficiency.Both can be dynamically nonlinear synergistic regulation according to molten pool flow regime and reaction path, effectively compensate the airflow blind area of side blowing in the center area of the furnace, eliminate the intermediate dead zone, thereby strengthen the mixing uniformity of molten pool, reaction rate and energy utilization rate.The present application has reasonable structure, high airflow transport efficiency, and is suitable for non-ferrous metal smelting with high reaction intensity and high uniformity requirement.

The present application relates to the technical field of smelting, and discloses a method for treating acid leaching residue of laterite nickel ore by means of double-side blowing, which comprises the following steps: S1. mixing acid leaching residue of laterite nickel ore and flux as raw materials, and spraying the raw materials into oxygen-enriched air and fuel for side blowing oxidation smelting to obtain oxidation smelting flue gas and oxidation smelting slag, and separating the oxidation smelting flue gas to obtain acid raw material gas which is sent to a sulfuric acid production process to produce sulfuric acid; S2. adding a reducing agent to the oxidation smelting slag, and spraying the oxidation smelting slag into oxygen-enriched air and fuel for side blowing reduction smelting to obtain molten iron, reduction smelting flue gas and reduction smelting slag, adding a desulfurizing agent to the molten iron for desulfurization, and producing iron ingots from the desulfurized molten iron. The present application can realize comprehensive utilization of acid leaching laterite nickel ore residue, fully recover residual valuable metals Fe, Ni and Co, fully develop and utilize components such as valuable metals, sulfur and tailings, and output zero solid waste, and turn waste into treasure.

The present application belongs to the field of energy comprehensive utilization and combustion control technology, and discloses an oxygen-enriched nonlinear combustion system and method based on frequency regulation of combustion air fan, which comprises a burner, a supply route connected with the burner, the supply route comprising a gas supply route and an air supply route, the gas supply route being used for delivering natural gas to the burner, and the air supply route being used for delivering oxygen-enriched air to the burner, and an electronic control system electrically connected with the supply route, through which nonlinear regulation of combustion parameters and accurate matching of flow rate are realized. The present application can effectively enhance the uniformity of gas mixing, strengthen the combustion process, reduce pollutant emission, and improve the combustion efficiency and stability.

This invention provides an oxygen supply mechanism for a pulverized coal combustion device, comprising an oxygen-enriched channel, a central body, and a control component. One end of the oxygen-enriched channel is a nozzle extending through the pulverized coal channel, while the other end is located outside the pulverized coal channel and connected to an oxygen evaporation device. The nozzle includes a gradually expanding section that points outward along the axial direction of the nozzle, with its inner diameter gradually increasing. The central body is adjustable within the nozzle along its axial direction, forming an annular flow channel between the central body and the inner wall of the nozzle. One end of the control component is connected to the central body, and the other end extends to the outside of the pulverized coal channel. This oxygen supply mechanism allows for adjustment of the annular flow channel area by changing the position of the central body, enabling flexible control of the oxygen flow rate. This ensures optimal mixing of pulverized coal and oxygen under different load conditions and pulverized coal concentrations.

The present application relates to the field of blast furnace smelting technology, and proposes a vanadium-titanium magnetite blast furnace smelting method, which comprises: adjusting the burden structure and the ore grade in the blast furnace smelting process to obtain a slag with a mass content of TiO2 of 23.5-24.5%, and produce molten iron and pig iron; controlling the mass content of MgO in the slag to be 7-9%, the mass content of Al2O3 to be 13.5-15%, the slag basicity R2 to be 1.06-1.10 times, and R3 to be 1.38-1.42 times to optimize the fluidity of the slag; controlling the oxygen enrichment rate of the blast furnace to be 4.0-6.0% to make the mass content of Ti(CN) in the slag less than 0.5% and reduce the deterioration of the fluidity of the slag; and controlling the temperature of the molten iron to be 1430-1460 DEG C to make the mass content of titanium in the pig iron be 0.18-0.28% to optimize the separation of slag and iron. The present application realizes that the blast furnace can maintain stable and efficient smelting when the mass content of TiO2 in the slag is 23.5-24.5%.

This invention relates to the field of waste incineration system technology, specifically to an energy-saving oxygen-enriched incineration system for municipal solid waste in high-altitude areas. The system includes an incinerator, a secondary combustion section, and an exhaust pipe connected in sequence. The incinerator contains a primary combustion chamber with a first combustion grate. An air supply section is located on the side of the incinerator, containing a mixing chamber. The air supply section is equipped with oxygen supply equipment and a blower connected to the mixing chamber. A horizontal air pipe connected to the mixing chamber is horizontally arranged within the primary combustion chamber. Several vertical air pipes are vertically arranged above the horizontal air pipes, with their upper ends positioned above the first combustion grate. Several short exhaust pipes are arranged on the outer wall of the vertical air pipes, with the exhaust pipes angled downwards from one end connected to the vertical air pipe to the other. This invention addresses the problem in existing technologies where increased energy consumption during the incineration of municipal solid waste in high-altitude areas is easily caused by factors such as oxygen content and temperature.

This invention relates to a method for selectively and stepwise extracting antimony and copper from precious silver alloys using temperature-controlled oxygen enrichment. The method includes: blowing the precious silver alloy at 700–800°C with a mixed gas containing 25%–30% oxygen for low-temperature oxygen enrichment blowing to produce antimony-oxygen powder; heating the blown alloy to 950–1000°C, adding an alkaline covering flux, and then blowing oxygen-enriched compressed air to oxidize copper and residual antimony into slag, obtaining a gold-silver enriched alloy; crushing and ball-milling the obtained copper slag, then leaching it using a sulfuric acid system with the addition of persulfate oxidant, followed by pressure filtration to obtain a leachate and leaching residue; electrowinning the leachate to produce black copper; and returning the leaching residue to the pyrometallurgical smelting system to recover gold and silver. This invention achieves efficient separation and recovery of silver, antimony, and copper from precious silver alloys through a short-process coupled process of "low-temperature oxygen enrichment for antimony removal – high-temperature oxygen enrichment for copper slag production – oxidative acid leaching for copper recovery," offering advantages such as high antimony ash grade, good copper slag enrichment, high copper leaching rate, and low precious metal loss.

The present application provides a kind of cement industry chemical absorption method carbon capture after decarburization flue gas processing method, including the organic matter containing oxygen-rich gas obtained by the decarburization flue gas through water vapor condensation process and nitrogen separation process processing is carried out oxygen-enriched combustion, can realize the complete harmless of organic pollutants.The present application mainly includes 4 aspects of content: decarburization flue gas water removal, nitrogen separation and purification, cement kiln oxygen-enriched combustion and harmless disposal of organic pollutants.The method of the present application, according to the characteristics of existing cement process and chemical absorption method carbon capture process, by the oxygen-rich gas containing organic pollutants in the original decarburization flue gas is blown into cement kiln system for oxygen-enriched combustion at the same time for cement clinker cooling, can realize the complete harmless disposal of organic pollutants and the deep coupling of oxygen-enriched combustion, make decarburization flue gas reach sufficient resource utilization and harmless disposal, the method of the present application is simple, wide application range, economic value is remarkable.

This invention relates to a low-temperature oxidative roasting pretreatment method and supporting equipment for gold-bearing pyrite. The method includes: raw material preparation; humidification and cooling; low-temperature oxygen-enriched roasting; and roasted sand collection. The supporting equipment includes a batching bin, the bin outlet of which is connected to the feed hopper inlet via an elevator, and the feed hopper outlet connected to the fluidized bed furnace inlet via a conveyor belt. A spraying device is mounted on the conveyor belt. Atomized temperature-regulating and water-replenishing device and a temperature sensor are installed in the upper and middle combustion spaces of the fluidized bed furnace. An online oxygen analyzer is installed on the flue gas duct at the top of the fluidized bed furnace, and is sequentially connected to a waste heat boiler, a cyclone dust collector, an electrostatic precipitator, and an acid production system. The air inlet at the bottom of the fluidized bed furnace is connected to a blower via an air duct. This invention achieves full oxidation of gold-bearing pyrite under low-temperature, oxygen-enriched, and low-gas-velocity conditions, resulting in loose and porous roasted sand and a significantly increased gold and silver exposure rate, providing important technical support for the comprehensive utilization of the valuable components of gold-bearing pyrite.

The utility model relates to the technical field of difficult degradation wastewater microwave catalytic oxidation treatment equipment, especially to a kind of microwave catalytic oxidation treatment difficult degradation wastewater integrated reaction device, it is filtered to wastewater by being arranged filtering device, can prevent solid impurities in wastewater from scratching catalyst, prolong the service life of machine, and by being arranged oxygen enrichment device, oxygen in air is enriched, can improve the oxygen amount of being inhaled to machine interior, improve machine oxidation efficiency;Including microwave catalytic oxidation device;Still including filtering device, aeration device, ionization device, oxygen enrichment device and recovery device, filtering device and aeration device are all installed on microwave catalytic oxidation device, ionization device is installed on aeration device, oxygen enrichment device is installed on ionization device, recovery device is installed on microwave catalytic oxidation device and oxygen enrichment device.

This invention provides an oxygen-generating component and an air conditioner. The oxygen-generating component includes: a shell structure having an exhaust port, an oxygen-generating inlet, and a ventilation inlet; the exhaust port is connected to the outside, and both the oxygen-generating inlet and the ventilation inlet are connected to the indoor unit; an oxygen-enriched membrane structure disposed within a cavity of the shell structure; and a fan blade rotatably disposed within the cavity of the shell structure. The oxygen-generating component has an oxygen-generating mode and a ventilation mode. In the oxygen-generating mode, the ventilation inlet is closed, the oxygen-enriched membrane structure operates, and the intake air undergoes oxygen and nitrogen separation through the oxygen-enriched membrane structure. Nitrogen is output to the outside through the exhaust port, while oxygen is delivered to the indoor unit. In the ventilation mode, the ventilation inlet is open, the oxygen-enriched membrane structure stops operating, and the intake air is output to the outside through the exhaust port. This solution integrates oxygen generation and ventilation functions in a space-constrained air conditioner, avoiding the increased structural complexity caused by separate oxygen-generating and ventilation structures, and reducing the energy consumption of the air conditioner.