Patents
Literature
409 results about "Tuyere" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
A tuyere or tuyère ([tɥijɛʁ]; English: /twiːˈjɛər/) is a tube, nozzle or pipe through which air is blown into a furnace or hearth. Air or oxygen is injected into a hearth under pressure from bellows or a blowing engine or other devices. This causes the fire to be hotter in front of the blast than it would otherwise have been, enabling metals to be smelted or melted or made hot enough to be worked in a forge, though these are blown only with air. This applies to any process where a blast is delivered under pressure to make a fire hotter.
Peak shaving system for bypass powder bin externally hung on powder outlet pipe of coal mill
ActiveCN224142436UGrain treatmentsLump/pulverulent fuel preparationCombustion systemProcess engineering
The utility model discloses a coal mill powder outlet pipe external bypass powder bin peak regulation system which is installed on a powder outlet pipe at an outlet of a coal mill and comprises a bypass powder bin, a bypass air powder pipe, a powder storage control valve, a powder feeder and an exhaust pipe. A bypass connector, a powder feeding port and an air return port are formed in the side wall of the powder outlet pipe. An air-powder separator is arranged at the top in the bypass powder bin, and an air-powder inlet and an exhaust gas outlet are formed in the air-powder separator; one end of the bypass pulverized coal pipe is communicated with the bypass interface, and the other end is tangentially connected into the pulverized coal inlet; the powder storage control valve is arranged on the bypass interface; a powder feeding inlet and a powder feeding outlet are formed in the powder feeder, the powder feeding inlet is communicated with the bottom of the bypass powder bin, and the powder feeding outlet is communicated with the powder feeding opening; and the other end of the exhaust pipe is communicated with the air return port. The device realizes rapid and accurate dynamic matching of a fuel system and a combustion system, is safe and environment-friendly, has an ingenious, simple and practical structure, and is easy to transform and popularize.
Owner:ZHEJIANG XINGHE INTELLIGENT DEV TECH CO LTD
Layered, partitioned and differentiated CO2 injection system and method for blast furnace
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.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
Airflow organization optimization design system and method based on clean room tuyere
InactiveCN122046441AGeometric CADDesign optimisation/simulationComputer Aided DesignProcess engineering
The invention discloses an airflow organization optimization design system and method based on a clean room tuyere, and relates to the technical field of clean room tuyere design, the system comprises a digital twin model construction module, a real-time data acquisition module, a problem identification module, a parameter simulation optimization module and a pre-debugging scheme output module; according to the method, the digital twin model of the clean room is constructed through computer-aided design and linked with real-time operation data, conversion of airflow organization optimization from static design to dynamic response is achieved, the problem that in the prior art, an optimization scheme is disjointed with an actual operation scene is solved, and by automatically recognizing problematic tuyeres and simulating and optimizing a parameter adjustment scheme, the optimization efficiency is improved. Traditional blind debugging depending on manual experience is replaced, repeated trial and error are avoided, the debugging accuracy and efficiency are improved, stable maintenance of cleanliness indexes of the clean room is guaranteed, meanwhile, the influence of the debugging process on the production progress is reduced, and powerful support is provided for efficient and reliable operation of the clean room.
Owner:GUANGDONG TIANHUI CONSTRUCTION CO LTD
Production method of pig iron
A production method of pig iron using a blast furnace with a tuyere includes: charging a first layer containing an iron ore material and a second layer containing coke alternately in the blast furnace; and reducing and melting the iron ore material in the charged first layer while injecting an auxiliary reductant into the blast furnace by hot air blown from the tuyere, in which: an aggregate for letting through the hot air to a central portion of the blast furnace is blended into the first layer; and the aggregate contains a reduced iron molded product obtained through compression molding of reduced iron.
Owner:KOBE STEEL LTD
Negative pressure collection and explosion-proof safety treatment system for metal dust in electromagnet manufacturing process
The invention discloses a negative pressure collection and explosion-proof safety treatment system for metal dust in an electromagnet manufacturing process, which comprises a dust negative pressure collection unit, a ferromagnetic dust separation unit, a multi-stage filtration explosion-proof unit, a dust recovery unit and an intelligent control unit which are sequentially connected through corrosion-resistant metal pipelines, the dust negative-pressure collecting unit comprises a customized air suction cover, an embedded ground air suction opening and a movable negative-pressure dust suction gun; the ferromagnetic dust separation unit comprises an electromagnetic separation barrel, and a spiral flow guide channel is arranged in the barrel and is matched with a compressed air back flushing device; the multi-stage filtering explosion-proof unit comprises a first-stage cyclone separator and a second-stage HEPA efficient filter, an explosion-proof and explosion-proof layer is arranged on the outer side of the multi-stage filtering explosion-proof unit, and the multi-stage filtering explosion-proof unit is provided with a spark The intelligent control unit adopts a PLC control system, is connected with a dust concentration sensor, a temperature sensor and a pressure sensor, and supports remote monitoring and fault diagnosis. By means of the system, zero explosion risk, low emission and resource recycling of electromagnet manufacturing process dust are achieved.
Owner:JIANGSU ANTAI SAFETY TECH CO LTD
Circulating fluidized bed boiler system utilizing waste heat of solid waste bottom slag
The embodiment of the invention discloses a solid waste bottom slag waste heat utilization circulating fluidized bed boiler system which comprises a boiler body and an air-water slag cooler, the boiler body is provided with a discharge port and an air return port, the discharge port is used for discharging high-temperature bottom slag outwards, the air return port is used for conveying air into the boiler body, and the air-water slag cooler is used for cooling the air-water slag cooler. The air-water slag cooler comprises a shell and an economizer, the shell communicates with the discharge outlet so as to be used for receiving high-temperature bottom slag discharged from the boiler body, and the shell is provided with an air inlet so as to be used for conveying air into the shell; the economizer is arranged in the shell and used for recycling flue gas waste heat emitted by the high-temperature bottom slag and can convert air conveyed into the shell into hot air, and the hot air converted by the economizer can be circularly conveyed into the boiler body through the air return opening. According to the circulating fluidized bed boiler system utilizing the waste heat of the solid waste bottom slag, waste of heat energy is reduced by recycling the waste heat of the high-temperature bottom slag, and the overall heat efficiency of the boiler is improved.
Owner:XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD
Application and device of recycled silicon powder in polycrystalline silicon production in ferrosilicon smelting
The invention provides an application and a device of recycled silicon powder in polycrystalline silicon production in ferrosilicon smelting. High-purity fine silicon powder generated in the polycrystalline silicon production process is recycled and used for ferrosilicon smelting, resource utilization of industrial solid waste is achieved, and remarkable environmental protection and economic value is embodied. The high-purity silicon powder can be directly subjected to a solid-phase reduction reaction with iron oxide in furnace charge, so that the consumption of coke or other carbon sources is reduced, the emission of carbon dioxide is reduced, and the energy consumption required for reducing silica into silicon is also reduced. According to the scheme, complex impurity removal treatment is not needed, the silicon powder can participate in the reduction reaction through segmented blowing of the blast furnace tuyere, operation is easy and convenient, the source is stable, the quality uniformity of raw materials is guaranteed, and therefore the chemical component controllability and the smelting efficiency of silicon iron products are improved. The recycled silicon powder is small in particle size, large in specific surface area and high in reaction rate, the smelting time can be further shortened, and the overall production efficiency is improved.
Owner:青海丽豪清能股份有限公司
Electric furnace dust removal device
The utility model discloses an electric furnace dust removal device, including the draft hood subassembly, its main point is: still including follow -up air pipe, adjusting mechanism and valve device. The draft hood subassembly includes the mounting seat and the draft hood, and the mounting seat fixedly arranged on the corresponding electric furnace body platform. The draft hood includes the upper cover portion and the air pipe connecting portion. The air pipe connecting portion rotationally arranged on the mounting seat, and the follow -up air pipe rotationally arranged on the mounting seat, and one end of follow -up air pipe communicates with the upper cover portion inside through the air pipe connecting portion, and the second suction air mouth of the other end of follow -up air pipe is overlapped and communicated on the air inlet of the smoke removal pipe of the dust removal system of the corresponding site, and the draft hood is driven to rotate through the adjusting mechanism.
Owner:CHANGZHOU YAOSHI CASTING MATERIAL CO LTD
Device for preventing blast furnace tuyere blowpipe from sinking
The utility model provides a device for preventing a blast furnace tuyere blowpipe from sinking. The device for preventing the blast furnace tuyere blowpipe from sinking comprises a tuyere large sleeve, a tuyere medium sleeve, a tuyere small sleeve, a supporting boss, a mounting plate and a moving assembly, the tuyere medium sleeve is arranged at the rear end of the tuyere large sleeve, the tuyere small sleeve is arranged at the rear end of the tuyere medium sleeve, the supporting boss is arranged in the tuyere small sleeve, and the mounting plate is arranged in the tuyere small sleeve. The outer diameter of the supporting boss is matched with the inner diameter of the small tuyere sleeve, and the inner diameter of the supporting boss is matched with the outer diameter of a tuyere blowpipe. According to the device for preventing the blast furnace tuyere blowpipe from sinking, the tuyere blowpipe is not easy to sink when the blast furnace is in damping down due to the arrangement of each structure, so that the maintenance and repair period of workers on the blast furnace is prolonged, and the cost of the workers is reduced.
Owner:LVLIANG JIANLONG IND CO LTD
System and method for co-combusting biomass and ammonia in a pulverized coal furnace
PendingCN122107376ACombustion using gaseous and pulverulent fuelCombustion using liquid and pulverulent fuelThermodynamicsNitrogen oxides
The application discloses a system and method for blending biomass and ammonia gas in a pulverized coal furnace, and belongs to the technical field of fuel combustion. The boiler combustion area is divided into a stable combustion zone, a main combustion zone, a reduction zone I, a burnout zone I, a reduction zone II and a burnout zone II. The stable combustion zone is provided with a biomass burner and a pulverized coal burner, the main combustion zone is provided with a biomass burner, a pulverized coal burner and an ammonia gas burner, the reduction zone I and the reduction zone II are arranged with ammonia gas burners, and the burnout zone I and the burnout zone II are arranged with burnout air ports, which is conducive to the stable blending combustion of pulverized coal, biomass and ammonia gas and reduces the emission of nitrogen oxides. The application improves the combustion stability and relieves the problems of ash deposition, slagging and corrosion through biomass pretreatment such as secondary crushing, water washing and drying. The application uses the heat of high-temperature flue gas for liquid ammonia gasification and biomass drying, thereby improving the energy utilization rate.
Owner:SHANGHAI POWER EQUIPMENT RESEARCH INSTITUTE CO LTD +1
Method for operating a blast furnace
The operation method of a blast furnace improves the ventilation of the lower part of the blast furnace by tuyere injection of fine ore. The operation method of the blast furnace (1) of the invention is characterized in that coal is pulverized as fine coal, and an iron ore having a pulverized ignition loss of 9 mass% or more and 12 mass% or less is pulverized as fine ore, the injection rate of the fine coal is 150 kg / tp or more, the injection rate of the fine ore is 2.5 kg / tp or more and 50.0 kg / tp or less, and the fine coal and the fine ore are injected from the tuyere (2). It is preferable that the iron ore and the coal are pulverized together.
Owner:KOBE STEEL LTD
A method for purifying a source of dust in a tunneling process
PendingCN122441178A
A method for purifying smoke source in tunnel excavation process relates to the field of tunnel engineering air purification, comprising a device box, a negative pressure return air inlet, a pressure fan, a static pressure box, a smoke treatment device, a harmful gas purification device and a high-pressure air curtain system are fixed in the device box, the high-pressure clean air jet formed by the air outlet is sprayed to the drilling and blasting operation face, the high-concentration smoke-carrying air area is targeted, quickly diluted and strongly disturbed, the smoke-carrying air is passively returned to the negative pressure return air inlet grid area on both sides of the device box, the smoke particles are intercepted and purified by the smoke treatment device, the harmful gas is purified by the harmful gas treatment device, and the purified air is pressurized and sprayed by the pressure fan to complete the circulation of the smoke-carrying air on the face; the airflow organization formed by the method has good disturbance effect on the air retention on the face, has good smoke and dust removal effect in a large space or range, and is also suitable for relatively closed space.
Owner:CHINESE PEOPLES LIBERATION ARMY UNIT 96608
Integrated efficient dust removal adjusting tuyere
Owner:YANGZHOU XINYANG VENTILATION EQUIP CO LTD
Coke blast furnace with moisture compensation function
The invention discloses a coke blast furnace with a moisture compensation function, and relates to the technical field of coke blast furnaces, the coke blast furnace comprises a hopper, the bottom of the hopper is fixedly connected with the top of a furnace shell, and an anti-precipitation structure, a filtering structure and a cleaning structure are arranged in the furnace shell; the coke blast furnace with the moisture compensation function comprises a filter structure and an anti-precipitation structure, the anti-precipitation structure comprises a thermal expansion frame, a heat conduction sheet, a piston plate and a driven part, and the surface of the piston plate is slidably connected with the inner wall of the thermal expansion frame. Carbon ash and carbon monoxide generated after the coke is strongly combusted can rise under hot air flow in the blast furnace, at the moment, the filter plate in the tuyere area of the blast furnace can filter the carbon ash, active adsorption cotton in the filter plate can adsorb the carbon monoxide, and therefore it is guaranteed that exhausted gas does not contain substances harmful to the human body, and the service life of the blast furnace is prolonged. Therefore, the personal safety of workers is ensured.
Owner:高光伟
Electric heating reaction furnace with collecting device
The utility model relates to an electric heating reaction furnace with a collecting device, which comprises an electric heating furnace, the collecting device is arranged on the right side of the electric heating furnace, the collecting device is used for collecting materials discharged from an outlet of the electric heating furnace, the collecting device comprises a fixed support and an inclined square tube, and the left end of the square tube is communicated with the outlet of the electric heating furnace. A plurality of tuyeres are arranged on the front side of the square pipe at equal intervals from left to right, the rear ends of the tuyeres communicate with the interior of the square pipe, the multiple tuyeres communicate with the same air inlet pipeline, a guide plate is arranged on the right front side of the interior of the square pipe, the left side of the guide plate is rotationally connected with the inner wall of the square pipe, and a push-pull rod is fixedly installed on the front side of the right end of the guide plate. The front end of the push-pull rod penetrates through the square pipe and extends to the outer side of the square pipe, and the air inlet pipeline sprays air flow into the square pipe from the multiple nozzles at a high speed, so that materials heated by the electric heating furnace can more quickly pass through the square pipe and enter a punching machine required by the next process.
Owner:SHANGHAI YUNHONG NEW MATERIALS CO LTD
A low copper loss two-sided blown bath smelting process
The application discloses a low copper loss double-side blown bath smelting method and belongs to the technical field of copper pyrogenic smelting. The method constructs a vertical oxygen potential gradient in the same smelting furnace: 70%-85% of oxygen-rich air is blown into the tuyere at the lower part of the furnace body to form a strong oxidation smelting zone; and a reducing medium such as natural gas or pulverized coal is sprayed into the slag layer at the upper part of the furnace body to form a weak reduction clarification zone. The amount of the reducing medium sprayed is dynamically adjusted by on-line monitoring of the CO content in the flue gas or the Fe3O4 content in the slag, and the Fe3O4 content in the slag is controlled to be 3%-6%. The method efficiently reduces Fe3O4 in the slag into FeO, significantly reduces the viscosity of the molten slag, and improves the slag-ice-copper separation condition, so that the copper content in the discarded slag is stably reduced from more than 1.8% in the conventional method to less than 1.3%, and the metal recovery rate is improved. Meanwhile, the method realizes integration of smelting and tempering, simplifies the process, reduces energy consumption, and enhances the adaptability to complex raw materials.
Owner:CHIFENG YUNTONG NON FERROUS METAL CO LTD
Furnace temperature control method and device in heat deficiency state of blast furnace
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.
Owner:RIZHAO STEEL HLDG GROUP
Air duct structure and cooking equipment with same
This invention discloses a duct structure and a cooking device having the same. The duct structure includes: an air outlet duct component defining an air outlet duct and having an air inlet and an air outlet; and an exhaust duct component connected to the air outlet duct component and disposed adjacent to the air outlet, defining an exhaust duct and having an air inlet, a steam inlet, and an exhaust outlet, with the air inlet communicating with the air outlet duct. According to the duct structure of this invention, air enters the air outlet duct through the air inlet, a portion of the air is discharged through the air outlet, and another portion of the air enters the exhaust duct through the air inlet. This allows for the cooling and condensation of the steam entering the exhaust duct through the steam inlet, and finally, the cooled steam is discharged through the exhaust outlet. This reduces the amount of steam released into the room and cools the steam, preventing burns to users and improving safety. It also solves the technical problems of large steam discharge and high steam temperature that easily burn users in related technologies.
Owner:GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD +1
Air cooling system of quenching device
The invention relates to the technical field of aluminum profile extrusion online quenching devices, and provides a quenching device air cooling system, which comprises an air bellow, air ports and a fan, the air ports comprise a plurality of front air ports, the front air ports form a ventilation enclosed structure by a first front side plate, a first rear side plate and a first end plate, and a first connecting end and a first air nozzle are formed at the same time; a front side plate, close to the first connecting end, of the front air opening is locally machined into a first radius fillet. The front side plate, close to the first connecting end, of the positive air opening is locally machined into the first radius round corner, each branch of air turns through the connecting end and enters each positive air opening, each branch of air passes through the large radius round corner firstly, the air resistance coefficient can be greatly reduced, and local air resistance is obviously improved. Under the condition that the quenching device is provided with a large number of positive tuyeres, the accumulated wind energy loss reduction total value and ratio are large, the wind energy loss and energy consumption can be effectively reduced, and the energy utilization efficiency is improved.
Owner:GUANGDONG YILIKE ENERGY SAVING TECH CO LTD
A soda furnace low NOx emission combustion control method based on flue gas recirculation
The application discloses a kind of low NOx emission combustion control method of alkali furnace based on flue gas recirculation.The method is transported to the third air duct by induced draft fan after part of flue gas after dust removal, and air-gas mixture is formed after mixing with air, and is injected into the hearth from the alkali furnace third air distribution port.The application obtains the temperature field, concentration field and thermal efficiency in the furnace by establishing the geometric structure model and numerical calculation model of alkali furnace, and obtaining by CFD calculation;By adjusting different flue gas recirculation rates, the influence of flue gas recirculation rate on the temperature field, concentration field and thermal efficiency in the furnace is simulated, and the optimized flue gas recirculation rate is obtained.The application can reduce the oxygen content of the third air, reduce the generation of NOx in the high-temperature combustion zone, reduce pollution emissions, at the same time, the increased recirculation flue gas flow is beneficial to reduce the temperature of the lower part of the superheater, and relieve high-temperature thermal stress corrosion.
Owner:SICHUAN SENHUAN TECH
Mixed heating oven
ActiveCN224025574UElectrode manufacturing processesPretreated surfacesElectrical batteryLaboratory oven
The utility model relates to the technical field of battery pole piece drying production, and discloses a mixed heating oven which comprises an oven body, a conveying channel and tuyere units are arranged in the oven body, the tuyere units are connected with the oven body, and the tuyere units are distributed on the upper side and the lower side of the conveying channel. The tuyere units on the upper side of the conveying channel and the tuyere units on the lower side of the conveying channel are arranged in a staggered mode. A plurality of heating units are arranged in the drying oven body, distributed on the upper side and the lower side of the conveying channel and used for heating the pole pieces through electromagnetic heating or infrared heating. According to the scheme, the tuyere units are arranged on the upper side and the lower side of the conveying channel in a staggered mode, the pole pieces are conveyed in a suspended mode through the tuyere units when the pole pieces move in the conveying channel, meanwhile, hot air blown out by the tuyere units dries the pole pieces, and the heating unit heats and dries the pole pieces in an electromagnetic heating or infrared heating mode. And the auxiliary drying effect is achieved, drying of the pole pieces is accelerated, and the drying efficiency is improved.
Owner:SHENZHEN XINYUREN TECH
Blast-furnace tuyere small sleeve inner hole structure capable of being fully utilized
The utility model discloses a fully utilized inner hole structure of a blast-furnace tuyere small sleeve, relates to the technical field of blast-furnace tuyere small sleeves, and aims to solve the problems that the existing blast-furnace tuyere small sleeve is harsh in working environment, is easy to damage under the conditions of tuyere blockage, non-uniform airflow distribution at the upper part of a blast furnace or airflow fluctuation, and is not easy to damage. Meanwhile, molten iron makes direct contact with the copper wall of a small sleeve, heat flow drastically increases within an extremely short time, small sleeve melting loss can be caused, meanwhile, a necking lining is installed in the small sleeve, the size of the lining is not appropriate, the lining cannot be flush with the front section of the small sleeve, airflow entering a furnace is disordered, blast furnace inlet airflow is disordered, and the furnace condition is worsened. According to the technical scheme, the small sleeve is characterized by comprising a small sleeve body, a small sleeve air channel is formed in the center of the interior of the small sleeve body, a front air opening is reserved in the other end, located on the outer side of the small sleeve air channel, of the interior of the small sleeve body, and a surfacing layer is arranged on the outer side of the small sleeve body. And the effects of stable work, cost reduction and efficiency improvement are achieved.
Owner:RIZHAO DONGTAI COPPER ALLOY IND CO LTD
Rapid drying machine for granule production
The utility model provides a quick dryer for granule production, belongs to the technical field of granules, and solves the technical problems that hot air cannot be in uniform contact with the granules due to the fact that the granules are easy to accumulate, the drying is not uniform, and the quality of final products is influenced. A rapid drying machine for granule production comprises a base, two supporting shafts are rotationally connected to the top of the base, a plurality of drying grooves are formed in the surface of a drying roller and are annularly and evenly arranged, a plurality of air openings are formed in the drying grooves, one end of the drying roller is fixedly connected with a connecting pipe, and the connecting pipe and the air openings are arranged in a mutually-communicated mode; a rotating mechanism used for rotating the drying rollers is arranged on the surface of one rotating disc, rotating shafts are arranged in the multiple drying grooves, and adjusting mechanisms used for adjusting the scraping plates are arranged at one ends of the multiple rotating shafts. According to the utility model, through the arrangement of the drying groove and the scraping plate, the phenomenon of accumulation of particles can be effectively avoided.
Owner:ZHONGQING SANXIA YUNHAI PHARM CO LTD
Linkage control device for air inlet and air outlet of hot blast stove
The utility model discloses a hot blast stove air inlet and outlet linkage control device which comprises an air guide shell, a rotary connecting shaft, a first valve plate, a second valve plate, a heat insulation assembly and a driving mechanism, and the air guide shell is provided with a first air opening and a second air opening which are arranged side by side; the rotary connecting shaft sequentially penetrates through the first air opening and the second air opening to be rotationally installed on the air guide shell. The first valve plate is installed on the rotary connecting shaft and located at the first air opening. The second valve plate is installed on the rotary connecting shaft and located at the second air opening. The heat insulation assembly is installed on the air guide shell and arranged outside the rotary connecting shaft in a sleeving mode. The driving mechanism is provided with a rotating shaft, and the driving mechanism is installed on the side, back on to the air guide shell, of the heat insulation assembly. Linkage control of the valve can be achieved, the accuracy of temperature adjustment is improved, meanwhile, a driving mechanism is prevented from being damaged by a high-temperature environment, the reliability of equipment is improved, and the service life of the equipment is prolonged.
Owner:CHANGZHOU FANGYAO AUTOMATION TECH CO LTD
Green-energy-driven circulating blast furnace partition reduction melting separation process
The invention relates to a green energy-driven circulating blast furnace partition reduction melting separation process which comprises the following steps: reducing and heating first furnace top gas by taking green electric power as a main energy source to obtain high-temperature circulating gas; high-temperature circulating coal gas is sprayed into the furnace through a blast furnace tuyere and ascends to the upper part of the blast furnace through a melting zone at the lower part of the blast furnace to form an indirect reduction zone, and the furnace charge is reduced by the high-temperature circulating coal gas in the indirect reduction zone to obtain metallized furnace charge and second furnace top coal gas; the second furnace top gas returns to the step S1 for reduction and heating; and the metallized furnace burden moves downwards to the melting zone in the blast furnace, and slag and iron are discharged after melting separation. Coal gas is driven to be recycled and regenerated through green electric power, reduction and heating of coal gas CO2 at the top of the blast furnace are achieved, dependence of a traditional blast furnace on fossil fuel combustion is greatly reduced, the coal gas utilization rate is effectively increased, and carbon emission is reduced.
Owner:UNIV OF SCI & TECH BEIJING
Water mist and air curtain composite dust control and removal system based on fully-mechanized face chute baffle
The invention belongs to the technical field of coal mine dust control, and relates to a water mist and air curtain composite dust control and removal system based on a fully mechanized face chute baffle, which comprises a hydraulic support and a scraper conveyer arranged on one side of the hydraulic support, and a blowing and suction integrated purification dust remover is arranged on the chute baffle of the scraper conveyer. An exhaust inlet of the purification dust remover is positioned at the lower part and close to the height of a roller of the coal mining machine, and an air outlet is positioned at the upper part and inclines towards the coal wall side, so that dust generated by coal cutting of the coal mining machine is purified and discharged by utilizing an entrainment effect; the purification dust remover is arranged in a hollow interlayer on one side, close to the coal mining machine, of the chute baffle, the purification dust remover is linear, and the interior of a shell of the purification dust remover comprises an air suction section, a dust removal section, an atomization section, a dehydration section and an air outlet section which are communicated in sequence; a plurality of air outlet channels are arranged on the outer side of the air outlet section in the circumferential direction so as to be communicated with the air outlet, and an air inlet channel is arranged at the bottom of the air suction section so as to be communicated with the air suction opening.
Owner:CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
Method for operation of blast furnace
A method for a blast furnace includes pulverizing coal to make pulverized coal, and pulverizing iron ore to make pulverized iron ore, and injecting the pulverized coal and the pulverized iron ore from a tuyere. A loss on ignition of the iron ore is greater than or equal to 9% by mass and less than or equal to 12% by mass, an injection rate of the pulverized coal is greater than or equal to 150 kg / tp, and an injection rate of the pulverized iron ore is greater than or equal to 2.5 kg / tp and less than or equal to 50.0 kg / tp.
Owner:KOBE STEEL LTD
Device and system for tinning photovoltaic solder strip
The utility model belongs to the technical field of solder strip manufacturing, and relates to a device and a system for tinning a photovoltaic solder strip. Comprising a floating die for primary sizing and an annular air knife for secondary sizing, a first tangent point of a wire pressing plate in the vertical direction and an annular air opening focus point of the annular air knife are located on the same vertical line, and the floating die is located between the first tangent point and the annular air opening focus point; a lifting tin furnace is arranged below the wire pressing plate, a photovoltaic welding strip is pressed into tin liquid in the lifting tin furnace through the wire pressing plate, the average density of the floating die is smaller than that of the tin liquid, airflow of the annular air opening does not cause splashing of a small amount of the tin liquid, die blocking, scalding and other conditions are not likely to be caused, size fluctuation is small, and production efficiency is high. The size of a finished product can be controlled, and the size consistency of the product is guaranteed.
Owner:XIAN TELISON NEW MATERIAL +1
A cooling method for furnace repair and shutdown of a super large blast furnace
A cooling method for super-large blast furnaces during maintenance shutdowns involves intermittently spraying water from cross-shaped temperature measuring holes and tuyere water guns inserted into the tuyere outlets after the furnace is shut down. The water spraying method is monitored and controlled in stages to effectively cool the remaining coke surface in the hearth. Throughout the process, the water volume is rationally controlled based on a series of collected parameters, including gas temperature, gas concentration, and coke surface temperature. The installed water guns and tuyere water guns have atomizing spraying functions, working in conjunction with pre-set top water guns to spray water onto the coke surface in the center of the hearth for cooling. This invention implements intermittent water spraying cooling by collecting multiple parameters. This invention not only achieves coke cooling, creating safe working conditions for furnace construction, but also avoids damage to the carbon bricks caused by excessive water contact with the cooling water. Furthermore, it creates favorable conditions for cleaning broken coke from the hearth before furnace restart.
Owner:BAOSHAN IRON & STEEL CO LTD
Method for operating blast furnace
A method for operating a blast furnace with which, even in the case where there is an increase in the powder ratio of coke to be charged into the blast furnace, it is possible to achieve the stabilization of blast furnace operation. The method includes blowing air through a tuyere disposed in a lower part of the blast furnace, successively measuring a particle size distribution of coke transported to the blast furnace, and adjusting at least one of a blast volume and a coke ratio in accordance with an index derived from the particle size distribution.
Owner:JFE STEEL CORP