1014 results about "Tuyere" patented technology

The invention provides a nitrogen oxide incineration equipment control method for drying carbonization, which comprises the following steps: acquiring combustion characteristic data of high-humidity sludge blocks in a fluidized bed incinerator, and extracting nitrogen oxide peak intensity, occurrence time, duration and peak shape steep degree to obtain a parameter set; real-time load data of the induced draft fan are obtained, the hearth negative pressure stability fluctuation range is analyzed in combination with the adjustment value, and if fluctuation exceeds a preset safety range, the load adjustment amplitude of the induced draft fan is calculated, and a load adjustment curve is generated; a multi-actuator cooperative control time sequence model is constructed based on the load adjustment curve and the adjustment value, the nitrogen oxide peak generation time and the duration are fused, the cooperative adjustment time sequence of secondary air supply and the draught fan load is calculated, and a control instruction is generated; and a control instruction is transmitted to a fluidized bed incinerator executing mechanism, the opening state of the tuyere and the air volume ratio are adjusted, the load of the induced draft fan is updated, and the adjusted hearth operation parameters are continuously monitored.

The invention relates to the technical field of air feeder regulation and control, and discloses an intelligent regulation and control method and system for an air conditioner air feeder. Performing parameter preprocessing to obtain an environment data set; according to the environment data set and the indoor geometric features, a fluid dynamic model is adopted to calculate and simulate the motion state of indoor airflow, and a temperature prediction result is obtained; performing result analysis based on a preset constraint condition to obtain an initial parameter scheme; performing feedback processing on the parameter scheme to obtain real-time feedback data; based on a preset stability standard ratio, a tuyere parameter control algorithm is adopted for calculation, and a parameter correction scheme is obtained; and balance adjustment is conducted, a final parameter scheme is obtained, and dynamic response and accurate control over the air supply state are achieved in combination with the correlation mechanism of indoor airflow movement and air outlet parameters.

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.

A plateau permafrost region sand dune treatment system relates to the technical field of sand dune treatment and comprises a first treatment unit, a second treatment unit and a third treatment unit. The first treatment unit comprises a first treatment bottom layer and a first treatment top layer, and the first treatment bottom layer and the first treatment top layer are arranged in the height direction of the first sand dune; the first treatment top layer comprises a first coal gangue soil layer and a first vegetation layer, and the first vegetation layer is planted in the first coal gangue soil layer; the second treatment unit comprises a second treatment bottom layer and a second treatment top layer, and the second treatment bottom layer and the second treatment top layer are arranged in the height direction of the second sand dune; the second treatment top layer comprises a second coal gangue soil layer and a second vegetation layer, and the second vegetation layer is planted in the second coal gangue soil layer; and the third treatment unit is arranged in an area corresponding to the tuyere. Solid waste recycling and ecological restoration are deeply fused, the problem that a traditional sand stabilization material lacks ecological functions is effectively solved, and the sand stabilization material has the sand stabilization function and the vegetation restoration function.

The invention relates to the technical field of intelligent household appliances, and discloses a range hood control method and device, an intelligent range hood and a storage medium. Whether the air quality data meet preset conditions or not is detected; when the air quality data does not meet the preset condition, the current working mode and air opening configuration information are determined; according to the working mode, the tuyere configuration information and the air quality data, each tuyere is controlled to conduct air purification on the target space, and therefore the situation that due to the behavior of manual selection of a user, the purification mode does not correspond to the actual air quality data is avoided, and meanwhile the control real-time performance of the range hood is improved.

The invention discloses a system and a method for peak regulation of a bypass powder bin externally hung on a powder outlet pipe of a coal mill. A coal mill powder outlet pipe external bypass powder bin peak regulation system 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, is ingenious, simple and practical in structure, and is easy to transform and popularize.

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

The invention provides a multi-interlayer energy-saving hearth used on a gas stove. In the prior art, a single-layer gas control basin or a welded double-layer gas control basin is used for improving the detection thermal efficiency, but the thermal insulation performance is poor, more heat is lost, and the thermal efficiency is reduced. The multi-interlayer energy-saving hearth comprises an outer hearth and an inner hearth, the outer hearth is in a big-end-up round sleeve shape, the outer hearth is arranged outside a burner of the gas stove in a sleeving mode, the bottom face of the outer hearth is placed on the stove face of the gas stove to be in a closed state, an outer hearth boss is machined on the upper portion of the interior of the outer hearth, and a plurality of outer hearth air inlet holes are evenly distributed in the lower face of the outer hearth along the circumference; the appearance of the inner chamber is in a basin shape with an inner chamber hole in the center, the inner chamber is arranged in the outer chamber, the periphery of the inner chamber is placed on the outer chamber boss, the inner chamber hole is close to the burner and is flanged upwards, and a gap between the inner chamber hole and the burner is used as an outer air supplement port for secondary air; and the pot rack consists of a pot rack ring and a plurality of pot rack legs and is arranged on the upper edge of the outer chamber. Through multi-aspect improvement, the thermal insulation performance and heat recovery are improved, the thermal efficiency is higher than that of various existing gas stoves, and the gas stove is easy to detach and wash.

The invention relates to the technical field of ceramic product production and manufacturing equipment and a preparation process, in particular to a spray granulation process which comprises the following steps: preparing zirconium oxide slurry with the solid content of 90%, conveying the zirconium oxide slurry to a nozzle through a pipeline, and enabling the slurry to meet airflow at the nozzle and be atomized into tiny liquid drops; atomized liquid drops make contact with hot airflow for drying, the airflow temperature is controlled by a temperature control system to gradually rise from the inlet section to the outlet section of the main tower, and an airflow system adjusts the airflow speed and the airflow direction; the particles with the particle size larger than or equal to 40 micrometers fall to a discharging port in the bottom of the main tower under the action of strong airflow, and the particle size is lt; particles with the particle size of 40 microns flow to a brown air opening under the action of relatively weak air flow; the dried large particles are guided out from a discharge hole in the bottom of the main tower through a strong airflow regulator to be collected, and the dried small particles are collected through a connecting pipeline and a cyclone separator through an air inlet; the large particles are directly stored or subsequently processed, and the small particles are further processed or sub-packaged. Precise classified collection is achieved, and the granulation quality and the production efficiency are improved.

The invention belongs to the technical field of atmospheric pollution, and particularly relates to dust removal equipment for a mining machine, the dust removal equipment comprises a base, a cyclone separator and a bag-type dust remover which are communicated with each other are fixedly mounted at the upper end of the base, an air inlet of the cyclone separator is further fixedly communicated with an induced draft pipe, an induced draft fan is mounted on the induced draft pipe, and the bag-type dust remover is fixedly connected with the air inlet of the cyclone separator. The induced draft fan is fixedly installed at the upper end of the base, the front end of the induced draft pipe is further fixedly communicated with a dust hood through an elastic telescopic pipe, and the device further comprises a PLC, a dusty gas state detection mechanism, a pre-spraying water conditioning mechanism, an air inlet speed self-regulation mechanism and a feedback regulation mechanism. The power and the ventilation quantity of the induced draft fan are automatically adjusted based on the dust concentration, water is pre-sprayed based on the dust water content, the inlet air speed of the cyclone separator is adjusted based on the ventilation quantity, and the input number of filter bags of the bag-type dust remover is adjusted. The comprehensive functions of efficiently capturing dust, preventing overflow, avoiding equipment blockage, guaranteeing stable operation of dust removal equipment and saving energy are achieved.

The invention discloses an experimental device and method for simulating the combustion rate of pulverized coal injected by a blast furnace, and belongs to the technical field of blast furnace ironmaking. The experimental device comprises a hot air generation unit, a pulverized coal injection unit, a fuel gas injection unit, a pulverized coal hot air combustion unit, a tail gas treatment unit and a data processing unit; simulated injection of combustion-supporting gas, carrier gas and fuel gas in the blast furnace injection pulverized coal combustion process can be achieved, simulation of the blast furnace injection pulverized coal combustion process is accurately achieved, and then the pulverized coal combustion rates under different combustion conditions are accurately obtained. According to the device and the method, process condition simulation under different blast furnace combustion operation environments can be met, the combustion behavior of blast furnace injection pulverized coal at the front end of a tuyere is accurately simulated, and the combustion rate of the pulverized coal under different combustion conditions is accurately measured; and a basis is provided for analyzing the influence of different process control parameters on the blast furnace pulverized coal injection combustion condition, and optimization and application of the blast furnace pulverized coal injection technology are promoted.

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.

The invention discloses a safe, rapid and environment-friendly blast furnace blowing-out method which comprises the following steps: 24 hours before blast furnace blowing-out and charge level lowering operation, adjusting fuel to be 20% higher than that of normal production fuel, lowering binary alkalinity of a slag system to be 1.0-1.05 times, and not adding a water gun; after the charge level lowering operation is started, the blast furnace keeps high oxygen enrichment blast smelting, and the oxygen enrichment rate is 15-20%; circulating decarburized coal gas is sprayed into a tuyere, the spraying amount of each ton of iron is 100-150m < 3 > / t, the theoretical combustion temperature of the tuyere is adjusted to be not higher than 2400 DEG C, the water pumping amount of the furnace top is reduced by 30%, and the top temperature is kept not higher than 350 DEG C in the water pumping operation of the furnace top; a pressure regulating valve group is kept in a normally open state during the charge level lowering operation, and the O2 content in the coal gas does not exceed 1%; and the oxygen enrichment rate is kept at 7-10% during the period, decarburized gas tuyere injection is stopped, the top temperature is kept not exceeding 400 DEG C until the tuyere blows through, and the furnace shutdown operation is completed.

The invention belongs to the technical field of metallurgy, and discloses a method for quickly reproducing after long-term damping-down reproducing of a blast furnace, which comprises the following reproducing steps: step 1, a hearth core active preheating step: before blast reproducing of a main tuyere of the blast furnace or at the initial stage of reproducing, introducing oxygen-containing gas into a hearth central area through at least one iron notch, the central area of the hearth is actively heated; and 2, a drainage channel pre-construction step: opening the other iron notch after the blast of the main tuyere of the blast furnace is recovered and before a large amount of liquid iron slag is formed, and enabling high-temperature coal gas to be sprayed outwards from the iron notch by utilizing the pressure of gas formed in the furnace so as to dredge the hearth, heat the iron notch area and pre-construct the iron slag drainage channel. The cold state problem of the center of the hearth is solved through active preheating, a smooth drainage channel is constructed in advance through high-pressure coal gas flow, an iron notch area is heated, and the fatal risk that a high-temperature liquid phase newly produced in the initial stage of re-production gathers in the front edge area of the tuyere is fundamentally avoided.

The invention relates to the technical field of high-temperature fine powder cooling and heat recovery, aims to solve the problem that an existing fine powder cooling method cannot give consideration to fine powder quenching effect, heat exchange efficiency, heat recovery value, device installation and abrasion, and provides a convection type quenching heat recovery method for high-temperature fine powder. The high-temperature fine powder is cooled and subjected to heat recovery through the high-temperature fine powder convection type quenching heat recovery device; comprising the steps that high-temperature fine powder enters a material bed from a feeding port, cooling air enters the material bed from the bottom, the side face and the middle of the material bed, and due to the inclined arrangement of the material bed, the airflow suspension dispersion effect of an air supply system and the effect of a conveying and stirring device, the fine powder gradually forms a material layer from the feeding port, moves to a discharging port and enters an air pipe; main hot air rises and is recovered through the heat recovery air opening, part of the hot air enters the air pipe, and the balance wall isolates heat recovery air from discharging air draft. The quenching heat exchange rate can be increased, the product quality is improved, the heat recovery efficiency is improved, and the cooling device is simple in installation mode and small in abrasion.

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.

The invention relates to the technical field of blast furnace ironmaking, in particular to a method for achieving rapid blow-in of a blast furnace through microwaves. The method specifically comprises the following steps that S1, microwave generators and waveguide tubes are installed on an iron notch, a tuyere, a bosh, the lower portion of a furnace body and the upper portion of the furnace body of the blast furnace, and an inner cavity of the furnace body serves as a heating cavity; s2, thermocouples are installed at the upper portion, the tuyere and the iron notch of the blast furnace and used for measuring the temperature of materials in the blast furnace; s3, after oven baking leakage testing is finished, charging is conducted, coke is filled below a bosh, light-load materials are filled from the bosh to the lower portion of the oven body, and normal materials are filled above the middle of the oven body; s4, all microwave generators are started to heat materials in the furnace, and the temperature of furnace charge on the middle-upper portion of the furnace body is controlled to be smaller than the temperature of furnace charge from the lower portion of the furnace body to the hearth; s5, during heating, steam or nitrogen is introduced into the furnace top for cooling; and S6, after the furnace burden is heated to a preset state, the microwave generator is turned off, and air supply blow-in is carried out. The device has the advantages of high heating speed, high efficiency and no pollution.

The present invention relates to a method for determining the temperature of the bosh gas of a low-carbon blast furnace with multi-media injection, which belongs to the field of blast furnace ironmaking. First, the effective heat of coke Q is calculated based on the basic parameters of blast furnace operation and the composition of blast furnace injection materials and coke. net‑coke 、Effective heat of pulverized coal Q net‑coal , hot air effective heat Q net‑blast , effective heat of pulverized coal carrier gas Q net‑gas , effective heat of gas injection #imgabs0# effective heat of oxygen enrichment Q net‑carry The effective heat of the medium sprayed by the tuyere and the heat taken away by the cooling water at the tuyere Q net‑loss Secondly, the bosh gas content V is calculated by the chemical reaction in the tuyere raceway and the conservation of matter. bosh and average heat capacity c bosh , unburned coal powder content m C and average heat capacity c C The ash content m generated by the consumption of coke and pulverized coal at the tuyere ash and average heat capacity c ash ; Finally, calculate the furnace gas temperature T through the heat balance of the tuyere area f The present invention can accurately, reasonably and effectively reflect the actual thermal state and status of the hearth area, and provides an important judgment basis and technical foundation for guiding the adjustment of the lower part of the blast furnace.

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.

The invention discloses an intelligent cooperative control system for mine breathing effect wind pressure adjustment and mining-following wind resistance. Comprising a mine multi-parameter intelligent feedback wind pressure regulation and control method, a roadway top cavity multi-channel wind flow regulation and control mechanism and a mining-following sliding closed wind shielding device. According to dynamic sensing of multi-source environmental parameters, including coal face air flow pressure, overlying goaf static pressure and overflow CO concentration, a breathing effect intensity index HBI is calculated, and based on the HBI and a pressure difference direction, linear mapping is conducted on the target opening degree of an openable and closable tuyere assembly, and a dynamic regulation and control instruction is generated; a regulation and control instruction acts on the roadway top cavity multi-channel airflow regulation and control mechanism, the mechanism integrates a direct flow channel, a Z-shaped airflow channel and a pressurization channel, and intelligent regulation of airflow distribution and ventilation pressure intensity is achieved. The mining-following sliding airtight wind shielding device comprises a sliding guide rail assembly, a reel type folding airtight structure and a double-layer flexible branch bin air bag airtight assembly and synchronously slides along with advancing of the working face, and dynamic airtight and isolation compensation of the goaf is achieved.

The invention provides a snow blowing vehicle air outlet adjusting mechanism which comprises an exhaust pipe, an adjusting sleeve, an air opening angle adjusting mechanism and an air opening size adjusting mechanism, the air inlet end of the adjusting sleeve is arranged outside the air outlet end of the exhaust pipe in a covering mode, and the adjusting sleeve is hinged to the exhaust pipe through an angle rotating shaft and is in clearance fit with the exhaust pipe; a supporting arm is arranged on the outer side face of the exhaust pipe, an angle rotating arm is arranged on the outer side face of the adjusting sleeve, one end of the tuyere angle adjusting mechanism is hinged to the supporting arm, and the other end of the tuyere angle adjusting mechanism is hinged to the angle rotating arm. The tuyere size adjusting mechanism is arranged at the air inlet end of the adjusting sleeve, the air inlet end of the tuyere size adjusting mechanism is connected with the air outlet end of the exhaust pipe, the air outlet end of the tuyere size adjusting mechanism blows air outwards, and the air outlet end of the tuyere size adjusting mechanism has the degree of freedom larger than or smaller than the diameter of the air outlet end of the adjusting sleeve under the adjustment of the tuyere size adjusting mechanism.

The present invention relates to a method for determining the optimal throat-waist diameter ratio of a blast furnace based on CFD process simulation. A CFD blast furnace process model is constructed to simulate the comprehensive performance indicators and internal states of blast furnaces with different throat-waist diameter ratios. The distribution of fluid velocity, pressure, temperature, etc. in the furnace can be obtained, and the conclusions are quantified. The coke ratio, yield, tuyere pressure, and internal state of the blast furnace are comprehensively considered to determine the optimal throat-waist diameter ratio of an industrial blast furnace based on the principle of minimum total energy consumption. At the same time, the method of the present invention is efficient, convenient, and low-cost. The blast furnace type optimized and designed using the method of the present invention has low blast furnace production cost, good thermal energy utilization, and high safety. This method makes up for the shortcomings of the current research on the throat-waist diameter ratio of blast furnaces, which is mostly based on engineering experience, with vague conclusions and the inability to clearly define the specific impact of changes in the throat-waist diameter ratio on the smelting performance of the blast furnace.

The utility model discloses a circulating air conveying aging standing baking oven which comprises an oven body, at least one baking chamber is arranged in the oven body, the baking chamber comprises two side plates which are symmetrically arranged left and right, and a plurality of bearing plates which are sequentially distributed from top to bottom are arranged between the two side plates. The side plates and the bearing plate are mesh plates densely provided with holes, a left air channel and a right air channel with preset widths are formed between the two side plates and the left side wall and the right side wall of the baking chamber respectively, a fan and an electric heating box are arranged at the top of the oven body, and a plurality of electric heating pipes are arranged in the electric heating box. An air inlet of the fan is communicated with the upper end of the left air duct, an air outlet of the fan is communicated with an air inlet of the electric heating box, and an air outlet of the electric heating box is communicated with the upper end of the right air duct. According to the utility model, the heat in the baking chamber can be uniformly distributed, the hot air circulation flowability is better, and the battery aging effect is further improved.

The utility model discloses an air nozzle burr removing device for blower manufacturing, and relates to the technical field of blower manufacturing. The tuyere burr removing device for blower manufacturing comprises a bottom plate, a plurality of electric sliding rails are fixedly connected to the upper surface of the bottom plate, a movable seat is transversely and fixedly connected to the top ends of sliding parts of the electric sliding rails, and by arranging the movable seat and a rotating disc, the two ends of a tuyere are generally in a circular shape and a rectangular shape respectively. After the distance between the two vertical blades is adjusted, the rectangular end of the tuyere is clamped on the two vertical blades, then the electric sliding rails drive the vertical blades to move, burrs at the rectangular end can be removed, then the distance between the two vertical blades is adjusted again, and the distance between the two vertical blades is made to be matched with the diameter of the circular end of the tuyere. And then the round end of the tuyere is clamped on the two vertical blades, and the rotating disc is rotated, so that burrs at the round end of the tuyere can be removed, the burr removing operation of the tuyere can be quickly carried out, and the practicability of the device is improved.

This blast furnace operation method comprises: isolating CO2 gas and H2O gas from a furnace top exhaust gas and removing the same to generate a reformed furnace top circulating gas; and blowing the reformed furnace top circulating gas into a blast furnace (10) from a shaft tuyere (12). The method is characterized by blowing a cracked gas generated through cracking of a NH3-containing gas into the blast furnace (10) from a normal tuyere (11).

The utility model discloses a stainless steel tuyere, which relates to the technical field of tuyeres and comprises a tuyere body, a control structure is arranged in an inner cavity of the tuyere body and comprises a control panel, a support rod and an adjusting component, the support rod is movably inserted in the middle of the control panel, and the adjusting component is arranged at the end of the support rod. The adjusting assembly is used for adjusting the distance between the supporting rod and the inner wall of the tuyere body. Through the arrangement of the control structure, the air outlet range and angle of the tuyere main body can be flexibly adjusted, so that various use requirements can be met, meanwhile, the control structure is convenient to disassemble and assemble in the tuyere main body, installation is carried out under the condition that the internal space of the tuyere main body is not damaged, and the service life of the tuyere main body is prolonged. According to the air nozzle, normal use of the air nozzle body is not affected after the control structure is detached, the structural safety is high, meanwhile, repeated use can be achieved, the cost is low, the application range of the air nozzle body is effectively widened, and the use flexibility and economic value of the air nozzle body are improved.

A blast furnace operation method according to the present invention is a blast furnace operation method of blowing oxygen gas and a reducing agent containing methane gas into a blast furnace from a tuyere of the blast furnace includes blowing preheating gas having an amount of carried heat greater than or equal to a predetermined amount of heat set in accordance with a blowing amount of the methane gas into the blast furnace from a gas blowing portion provided above the tuyere of the blast furnace in a case where an oxygen concentration in the oxygen gas is 80 vol% or more.

The present invention discloses a fast and uniformly heated thermal cleaning furnace, comprising a furnace body, a combustion chamber, a heat distribution mechanism, a carrier and a burner, wherein the combustion chamber is arranged above the furnace body, the heat distribution mechanism is arranged on the inner wall of the furnace body, the carrier is arranged at the inner bottom of the furnace body, the heat distribution mechanism comprises a heat sink, the heat sink and the inner wall of the furnace body form a cavity, and a heat distribution box is arranged in the cavity, the heat distribution box comprises a heat preservation plate and a box body, the heat preservation plate is fitted with the heat sink, a plurality of conical holes are arranged on the heat preservation plate, the conical holes open outward, the box body is connected to the inner wall of the furnace body, the heat sink is also provided with an air vent, and the air vent is provided with a gas valve. The workpiece of the present invention is heated simultaneously in multiple directions and evenly, so that the polymer compound reacts fully and the cleaning effect is better; the air vent that can quickly dissipate heat is provided so that heat can quickly enter the heating chamber, shortening the heating time and improving work efficiency.

The utility model discloses a corona machine high-pressure gas filtering device, which relates to the technical field of filtering devices and comprises a corona back roller, a protective cover covers the outer side of the corona back roller, a high-pressure electrode is fixedly connected to the top end in the protective cover, a high-pressure tuyere is fixedly connected to one side of the protective cover, and the high-pressure tuyere is fixedly connected to the other side of the protective cover. A high-pressure air pump is fixedly connected to one side of the high-pressure air nozzle, a filter box is fixedly connected to one end of the high-pressure air pump, activated carbon, a nylon net and non-woven fabric are fixedly connected to the interior of the filter box, a metal filter net is installed on the front side of the filter box, a material receiving box is fixedly connected to the bottom of the front side of the filter box, and a cleaning plate is arranged on the rear side of a moving plate. According to the high-pressure gas filtering device of the corona machine, the cleaning plate moves and wipes on the surface of the metal filter screen, dust on the surface of the metal filter screen is cleaned, the dust is pushed to the discharging position, dust collection is facilitated, and meanwhile activated carbon, a nylon net and non-woven fabric can be detached and replaced conveniently.

The invention relates to a rotary adjustable air port with a purification function, and belongs to the technical field of air conditioner air ports, the rotary adjustable air port with the purification function comprises an air pipe and an air port formed in the end portion of the air pipe, and further comprises two sets of ultraviolet lamps; a purification mechanism; a cleaning mechanism; an air blowing mechanism; and a liquid injection mechanism. Through cooperative use of the air blowing mechanism and the liquid injection mechanism, the liquid injection mechanism can inject a grease dissolving solution into the air blowing mechanism, and airflow containing the grease dissolving solution can act on the filter screen and the purification net respectively, so that grease attached to the filter screen and the purification net can be decomposed conveniently; the problems that the purification net cannot purify and decompose airflow discharged by the air conditioning system due to the fact that grease is attached to the purification net, the number of pollutants in the airflow is large, and health and safety of indoor personnel are affected are avoided, meanwhile, blockage of the filter net is avoided, the burden of follow-up personnel on cleaning of the air conditioning system is relieved, and the service life of the air conditioning system is prolonged. Therefore, the purification quality of the air flow exhausted by the air conditioning system is ensured.