146results about "Heating stoves" patented technology

The invention relates to a method for implementing double-furnace-shell transformation when a furnace shell of a hot-blast stove is cracked, which can effectively solve the problem of cracking of the furnace shell of the existing hot-blast stove, and adopts the technical scheme that the method comprises the following steps of: 1) dismounting a hoop; 2) designing a new furnace shell; 3) manufacturing a new furnace shell; (4) a new furnace shell is installed; (5) construction of the hole opening part of the old furnace shell; (6) a new hoop is welded; (7) welding a collapsible corrugated compensator at the new and old connection part on the upper part of the double furnace shells to absorb and release the expansion and contraction asynchronous difference of the new and old furnace shells; according to the method, the new furnace shell is installed outside the original furnace shell, the pressure of the hot-blast stove and the compressive strength of the furnace shell are effectively improved, the stress of a weld joint and a heat affected zone of the furnace shell is reduced, the service life of the furnace shell of the hot-blast stove is greatly prolonged, the using effect is good, and practicability is high; the method is an innovation of the cracking modification method of the hot-blast stove shell.

The invention provides an intelligent temperature regulation control method for a hot blast stove system based on a prediction model and self-adaptive control. The method comprises the following steps: S1, collecting operation data of a hot blast stove; s2, establishing a prediction model; s3, designing an intelligent temperature regulation controller based on model predictive control (MPC) to realize accurate prediction and regulation of the target temperature; s4, designing an air-fuel ratio (AFR) adaptive constraint mechanism, and dynamically optimizing the combustion efficiency and the emission performance; s5, a closed-loop intelligent temperature adjustment control execution unit is constructed, and real-time adjustment of key operation parameters is achieved; and S6, system integration and online deployment are completed, and it is ensured that the hot blast stove can keep stable temperature control under different working conditions and disturbance conditions. According to the method, through combination of prediction and adaptive constraint, the response speed and the control precision of the system to the working condition change are improved, and the operation stability is improved.

The invention provides a hot blast stove system energy-saving control method based on multi-parameter cooperative control. Firstly, parameters such as waste gas temperature, furnace top temperature, waste gas oxygen content and coal gas flow are collected through sensors, real-time data are input into a cooperative control module, an optimal waste gas temperature rise curve is fitted through a pre-trained deep neural network model, and an initial opening instruction of an air and coal gas regulating valve is calculated in combination with a multiple linear regression model. And then a parameter self-adaptive PID controller is used for dynamically adjusting parameters according to the real-time temperature deviation, a final control instruction is generated and executed, and effective regulation and control of waste gas and the vault temperature are achieved. The system can intelligently decide to increase or decrease the air or gas amount, optimize the combustion efficiency, reduce the gas consumption and prolong the service life of equipment. The method breaks through the limitation that control only depends on the optimal air-fuel ratio traditionally, a gas energy-saving scheme based on the waste gas temperature rise curve is provided, the method is suitable for a hot blast stove system in the metallurgical industry, and it is expected that gas consumption can be reduced by 3%-15%.

The invention belongs to the technical field of blast furnace smelting, and particularly discloses a hydrogen-rich carbon circulating oxygen blast furnace blow-in air supply system and method.The system comprises a blast furnace, an air inlet header pipe, a smoke header pipe and a plurality of hot blast stoves, each hot blast stove communicates with a nitrogen inlet pipe and a cold air inlet pipe, and each hot blast stove is provided with an air outlet pipe; each air outlet pipe is communicated with an air outlet header pipe, the air outlet header pipe is communicated with a communicating bustle pipe, the high way is communicated with a plurality of air inlet branch pipes, the bustle pipe is communicated with the air inlet branch pipes, the air outlet header pipe is communicated with an air mixing pipe, the bottom of each hot blast stove is communicated with a smoke exhaust pipe, and each smoke exhaust pipe is communicated with a smoke header pipe. The flue gas header pipe is communicated with a flue gas branch pipe I, the flue gas branch pipe I is communicated with the blast furnace, the flue gas branch pipe I is communicated with a flue gas branch pipe II, the upper end of each hot blast stove is communicated with a flue gas inlet pipe, each flue gas inlet pipe is communicated with the flue gas branch pipe II, and the flue gas branch pipe I is provided with a circulating fan. Efficient temperature control and oxygen reduction are achieved, waste heat recycling is achieved, and safe, energy-saving and low-carbon blow-in is achieved.

According to the flue gas utilization system of the hot blast stove, the flue gas of the hot blast stove is utilized, so that the situation that pulverization and pulverized coal conveying are affected when nitrogen in a factory is insufficient is avoided. The flue gas utilization system of the hot blast stove comprises a coal injection module used for pulverizing and conveying pulverized coal and a flue gas pipeline communicated with a flue at the tail of the hot blast stove, the coal injection module comprises a flue gas collecting piece and a pressurizing assembly, and the flue gas pipeline is directly or indirectly communicated with a first sub-pipe; the other end of the first sub-pipe is communicated with the flue gas collecting piece, and the first sub-pipe is further provided with the pressurizing assembly. The mode that nitrogen is used for the coal injection system is replaced by the process of pressurizing the flue gas exhausted by the hot blast stove, the energy utilization efficiency is improved, and the situation that the coal injection system is affected when the nitrogen is insufficient can be avoided.

The utility model relates to the technical field of heating devices, and discloses an energy-saving heating device which comprises a heating furnace mechanism, a waste heat treatment mechanism is fixedly arranged at the upper end of the heating furnace mechanism, a smoke treatment mechanism is fixedly arranged on one side of the waste heat treatment mechanism through threads, and the heating furnace mechanism comprises a heating furnace body. An efficient plate heat exchanger is fixedly arranged in the heating furnace body, guide plates are fixedly arranged on one side of the inner bottom face and one side of the inner top face of the heating furnace body, and the waste heat treatment mechanism comprises a heat preservation water tank. According to the device, a tube type heat exchanger in the heating furnace is replaced by the efficient plate type heat exchanger, high energy efficiency and low smoke exhaust temperature can be achieved, energy conservation and environmental protection are facilitated, the device is further provided with the waste heat treatment mechanism, after air is heated, residual gas with waste heat enters the waste heat treatment mechanism to be subjected to secondary heat exchange treatment, and the heat exchange efficiency is improved. And the waste heat utilization rate is increased, and resources are saved conveniently.

The present invention relates to an ironmaking system and method that couples solid oxide electrolysis with blast furnace waste heat utilization. The system comprises a solid oxide electrolysis system, a hot blast system, a heat exchange network, and a blast furnace body. The solid oxide electrolysis system, driven by the coupling of an external power source and blast furnace waste heat, produces hydrogen and oxygen by electrolyzing water. The hot blast system, fueled by blast furnace gas, continuously delivers high-temperature hot blast to the blast furnace. The heat exchange system uses the waste heat generated by the blast furnace to heat the fuel at the inlet of the solid oxide electrolysis cell and the hydrogen at the inlet of the blast furnace. The blast furnace body is used to reduce ore to smelt pig iron. By recycling waste heat from the blast furnace ironmaking process through the heat exchange network, heating the water at the inlet of the solid oxide electrolysis system and the hydrogen at the inlet of the blast furnace, the system effectively reduces the power consumption of the electrolytic hydrogen production process and is of great significance for the deep energy conservation and carbon reduction of blast furnace hydrogen-rich metallurgy technology.

The utility model discloses a hot blast stove hot blast valve drain outlet water leakage inspection structure, a first branch pipe with two open ends is installed below a drain outlet, a first valve is installed on the first branch pipe, the first branch pipe is provided with a front end and a rear end, the front end is communicated with the drain outlet, the rear end is bent to form an L-shaped bending part, and the first valve is installed on the first branch pipe. The bending part is connected with a second branch pipe with openings in the two ends, the second branch pipe is obliquely arranged downwards relative to the horizontal plane, a second valve is installed on the side, close to the bending part, of the second branch pipe, and a third valve is installed on the side, away from the bending part, of the second branch pipe; a water collecting space is formed between the second valve and the third valve, and a third branch pipe with the two ends open is installed at the end, away from the bent part, of the second branch pipe. The device is simple in structure, easy to operate and high in troubleshooting efficiency.

The invention discloses a pressurizing control system of a blast furnace hot blast stove, which comprises an air compressor assembly, a gas storage assembly, a first-stage pressure regulating valve group, a second-stage pressure regulating valve group and a self-pressurizing pipeline, and is characterized in that the air compressor assembly provides independent compressed gas for the hot blast stove; the problem that cold air of a blast furnace blower is not evenly distributed in the pressurizing process is avoided, it is ensured that the amount of cold air entering other air supply hot blast stoves is stable, the stability of the blast furnace inlet air amount and pressure is maintained, the adverse effect on the blast furnace condition is reduced, a stable air source is provided for hot blast stove pressurizing through the air storage assembly, and the buffering effect is achieved in the pressurizing process; the influence of air source pressure fluctuation on the pressurizing effect of the hot blast stove is avoided, the stability of the pressurizing process is ensured, and dual control over the on-off state and the flow state of compressed air is achieved through the first-stage pressure regulating valve set and the second-stage pressure regulating valve set. The internal pressure of the hot-blast stove is more accurately matched with the pressure of the blast furnace air supply pipeline, and the interference on the stability of air flow in the blast furnace is further reduced.

The invention relates to a method for reducing combustion gas consumption of a blast furnace hot blast stove, which comprises the following steps: S1, after the hot blast stove is converted from air supply to combustion, firstly, quickly increasing the temperature of a vault according to a specified gradient, and after ignition with smaller gas and air flows, gradually increasing the gas flow and the air flow to achieve the optimal flow required by normal combustion; s2, the coal gas flow and the air flow are adjusted, the air-fuel ratio reaches 1.05, and the vault temperature continues to rise; and S3, after the temperature of the vault reaches 1370 DEG C, the air-fuel ratio is adjusted again, and in combination with the change of the temperature of the flue, when the temperature of the flue is about 360-400 DEG C, the coal gas consumption is started to be reduced, meanwhile, it is guaranteed that the temperature of the vault is maintained at 1320-1400 DEG C, and when the temperature of the flue is increased by 8-12 DEG C, the coal gas amount is continuously reduced until furnace burning is finished. Gas combustion efficiency and hot-blast stove heat efficiency can be improved, so that gas usage amount of the hot-blast stove is saved, ironmaking cost is reduced, economic benefits are improved, and environmental pollution is reduced.

The present invention relates to a columnar flow multi-vortex low-nitrogen burner, which can effectively solve the problems of uneven gas mixing, insufficient combustion, unstable air flow, low combustion intensity, spalling, fracture and displacement of the gas nozzle bricks in the prior art. The technical solution adopted is that the burner body is composed of an arc-shaped wall in the lower half of the vault and a straight wall connected below the vault. An air inlet pipe is arranged on the outer side wall of the arc-shaped wall in the lower half of the vault, and an air annular channel is arranged inside the arc-shaped wall. A gas inlet pipe is arranged on the outer side wall of the straight wall below the vault, and a gas annular channel is arranged inside the straight wall. Air distribution channels are arranged vertically and evenly along the circumferential direction on the inner side wall of the gas annular channel. The present invention can make the gas mixing uniform, the combustion sufficient, the air flow stable, and the combustion intensity high. The air and gas are arranged in a columnar flow and staggered in two annular channels, so that the air flow mixing effect is better, which is an innovation on the burner.

The invention discloses a blast furnace system and a control method thereof. The blast furnace system comprises a blast furnace; the dust removal cover covers the blast furnace, and a dust removal pipeline is connected to the dust removal cover; the water slag flushing white elimination cover is connected with the dust removal pipeline through a steam pipeline, and a steam valve is arranged on the steam pipeline; an inlet of the dust removal assembly is connected with the dust removal cover through a dust removal pipeline, an outlet of the dust removal assembly is connected with an exhaust pipeline, and a dust detection device and a dust removal fan are arranged on the exhaust pipeline; an inlet of the dust removal chimney is connected with the exhaust pipeline; the hot-blast stove is connected with the blast furnace through a hot-blast pipeline, and a combustion-supporting air port of the hot-blast stove is connected with an air outlet of the dedusting chimney through a combustion-supporting air pipeline; the combustion-supporting fan is arranged on the combustion-supporting air pipeline; and the controller is electrically connected with the dust detection device and the steam valve, and the controller is configured to control the opening degree of the steam valve according to the dust content. The heat energy utilization rate is greatly improved and the energy consumption of the whole blast furnace system is reduced.

The invention discloses a blast furnace hot blast stove changing air pressure monitoring automatic error correction method and device, and belongs to the field of automatic control. The blast furnace air supply pressure of a hot air header pipe is monitored and recorded, when the hot blast stove needs to exhaust air and relieve pressure from the air supply state to the combustion state, the normal blast furnace air pressure value 20 seconds before the air supply state to the combustion state of the hot blast stove is taken as a reference value, and the actual air pressure value in the switching process from the air supply state to the combustion state of the hot blast stove is monitored in the whole process; continuously comparing the two values; when it is found that the air supply air pressure is instantaneously and greatly reduced, the furnace changing program is automatically terminated, an exhaust valve closing instruction is sent out, air exhausting of the hot blast stove is stopped, pressure relief of the hot blast stove is terminated, and then monitoring and automatic error correction of the blast furnace hot blast stove furnace changing air pressure are achieved; during production of the blast furnace, stable air pressure switching is achieved when a fault occurs in furnace changing of the hot blast furnace, the response speed is greatly increased, and the possible problems of misjudgment and missed judgment are avoided.

The high-temperature thermocouple fixing structure comprises a hot-blast stove main pipe, a hot-blast stove pipe shell is arranged on the periphery of the hot-blast stove main pipe, an isolation space is arranged along the circumference of the hot-blast stove pipe shell in an outward protruding mode, and a mounting structure used for fixing a thermocouple is arranged inside / outside the isolation space. A first sleeve structure layer is arranged in the installation structure, a second sleeve structure layer is arranged in the vertical direction of the first sleeve structure layer in a splicing mode, the first sleeve structure layer and the second sleeve structure layer are coaxially arranged, thermocouples are arranged in the first sleeve structure layer and the second sleeve structure layer, and the thermocouples are arranged in the first sleeve structure layer and the second sleeve structure layer. The thermocouple extends into the hot-blast stove main pipe, the isolation spaces on the hot-blast stove main pipe are arranged at intervals, thermocouple temperature measuring points are arranged at the positions of the isolation spaces according to different depths, the isolation spaces are of hollow structures protruding out of the hot-blast stove main pipe, and installation structures are arranged in the isolation spaces in a fixed mode.

The present invention relates to a method for ventilating a hydrogen-enriched and carbon-circulating oxygen blast furnace during a long period of ventilating shutdown. Before ventilating shutdown, the ventilating mode is switched from a mixed gas ventilating mode of hot coal gas, cold oxygen gas, and high-stability nitrogen gas to a mixed gas ventilating mode of hot compressed air, hot oxygen gas, and hot nitrogen gas. In the mixed gas ventilating mode of hot compressed air, hot oxygen gas, and hot nitrogen gas, after at least one smelting cycle has been operated, ventilating is stopped. At the beginning of re-ventilation, half of the tuyeres are opened and the other half are closed. During the re-ventilation process, the mixed gas ventilating mode of hot compressed air, hot oxygen gas, and hot nitrogen gas is used as the ventilating mode. When the tapping rate and stock line operation are normal and the number of open tuyeres accounts for 80% or more of the total number of tuyeres, the ventilating mode is switched from a mixed gas ventilating mode of hot compressed air, hot oxygen gas, and hot nitrogen gas to a mixed gas ventilating mode of hot coal gas, cold oxygen gas, and high-stability nitrogen gas. This method solves the problems that after a long period of cessation of blowing in a hydrogen-enriched and carbon-circulating oxygen blast furnace, the dead area at the tuyere is difficult to restore, the restoration speed is slow, the restoration process is likely to be repeated, and the blower at the tuyere is likely to be burned out, which makes it easy for furnace cooling accidents to occur.

The invention discloses an automatic furnace changing air supply control method and system for hot blast stoves, the control method adopts a mode that four hot blast stoves carry out two-burning and two-supply complete cross parallel connection to supply air into the blast stoves, and the control method comprises the following steps: a state judgment step; an air supply control step; an air temperature adjusting step; a state switching step; wherein a heating pipe with the preset length is arranged in the hot air main pipe, the heating pipe keeps the temperature at the target air temperature in an electric heating mode, and in the air temperature adjusting step, first hot air output by the first hot air furnace and second hot air output by the second hot air furnace are mixed in the hot air main pipe; and the mixed hot air flows through the heating pipe and then is conveyed into the blast furnace. According to the scheme, the air temperature in the hot air header pipe can be adjusted in real time, and hysteresis is reduced.

An instrumented plate for monitoring a refractory section of a furnace, the instrumented plate comprising: - a support plate (310) through which a plurality of orifices (304) pass, and at least partially made of a material consisting of fibers bonded together by a ceramic matrix, called a "ceramic matrix composite," or made of a precursor of said ceramic matrix composite; - a sensor (312) carried by said support plate, a precursor of a ceramic matrix composite being a material capable of transforming into said ceramic matrix composite under the effect of heating. Abbreviated figure: 3

The invention belongs to the technical field of low-carbon metallurgy, and particularly discloses a one-key damping down system and method for a hydrogen-rich carbon circulating oxygen blast furnace, and the method comprises the steps that a damping down program is preset, a one-key trigger button is arranged, temperature, pressure and gas component parameters in the furnace are monitored in real time through a sensor, and damping down is automatically triggered when the parameters are abnormal; constructing an intelligent decision-making system, analyzing real-time data by using a neural network model, and automatically generating a damping-down scheme according to the real-time data and historical data; the system is linked and integrated, a safety redundant system is constructed to be linked with a safety system, a damping down state is fed back in real time, emergency cooling is automatically started, gas is blocked and discharged, a unified control platform is constructed, all subsystems and equipment are integrated, a standard communication protocol is adopted, and real-time data transmission and cooperative work among the systems are ensured. According to the method, an intelligent algorithm and a process are deeply combined, standardization and intelligentization of damping-down operation of the blast furnace are achieved, and the method has safety, economic and environment-friendly values.

The application discloses a castable for hot-state repair of hot blast stove and application thereof, and the castable is composed of the following components in percentage by mass: fused mullite 50-60%, dense corundum powder 22-32%, alpha-Al2O3 micro powder 5-10%, submicron silicon micro powder 2-5%, perlite 4-7%, foaming agent 0.5-1%, and solidifying agent 0.4-1%; the mass of the above components is 100%, and 7-9% of the weight of the above components is added with silicon sol; wherein the perlite is closed perlite; and the foaming agent has a decomposition temperature of 110-160 DEG C. The castable has the advantages of high medium-high temperature strength, volume stability, effective resistance to hot blast erosion and corrosion, good heat preservation and heat insulation performance, reduced heat loss, safe and stable protection of the tube shell, and prolonged service life of the hot blast pipe network.

The present invention relates to a method for ventilating a hydrogen-enriched and carbon-circulating oxygen blast furnace during a long period of ventilating shutdown. Before ventilating shutdown, the ventilating mode is switched from a mixed gas ventilating mode of hot coal gas, cold oxygen gas, and high-stability nitrogen gas to a mixed gas ventilating mode of hot compressed air, hot oxygen gas, and hot nitrogen gas. In the mixed gas ventilating mode of hot compressed air, hot oxygen gas, and hot nitrogen gas, after at least one smelting cycle has been operated, ventilating is stopped. At the beginning of re-ventilation, half of the tuyeres are opened and the other half are closed. During the re-ventilation process, the mixed gas ventilating mode of hot compressed air, hot oxygen gas, and hot nitrogen gas is used as the ventilating mode. When the tapping rate and stock line operation are normal and the number of open tuyeres accounts for 80% or more of the total number of tuyeres, the ventilating mode is switched from a mixed gas ventilating mode of hot compressed air, hot oxygen gas, and hot nitrogen gas to a mixed gas ventilating mode of hot coal gas, cold oxygen gas, and high-stability nitrogen gas. This method solves the problems that after a long period of cessation of blowing in a hydrogen-enriched and carbon-circulating oxygen blast furnace, the dead area at the tuyere is difficult to restore, the restoration speed is slow, the restoration process is likely to be repeated, and the blower at the tuyere is likely to be burned out, which makes it easy for furnace cooling accidents to occur.

The utility model relates to the technical field of energy conservation and environmental protection, in particular to an environment-friendly dust removal system for backflow damping down of a hot blast stove, which comprises a gas pipeline, a diffusing pipeline, a flow slowing device, a cooler, a flow collecting device and a dust remover. The outlet end of the cooler is communicated with the flow collecting device which is communicated with the dust remover through a pipeline, and the dust remover is connected with the diffusing pipeline through a pipeline. High-temperature raw gas generated in the backflow damping-down process of the hot-blast stove enters the cooler through the flow slowing device, the contact area of the raw gas and a cooling pipe in the cooler is increased, the flow speed is reduced, and the raw gas rapidly enters the dust remover through the flow collecting device after being cooled, is filtered by a cloth bag and rapidly enters the diffusion pipeline under the driving action of the dust removal fan; and the backflow damping-down high-temperature raw gas of the hot blast stove can be quickly discharged after being filtered and purified, and the adverse effect on the environment caused by direct discharge of the raw gas is relieved.

This utility model discloses a blast furnace hot blast stove cooling water system based on a closed-loop soft water circulation system, including a blast furnace cooling module and a hot blast stove cooling module. The blast furnace cooling module, from the cooling wall outlet to the inlet of the blast furnace body, sequentially includes a main water collection pipe, a degassing tank, an expansion tank, an air cooler, a soft water pump, and a main measuring component. The hot blast stove cooling module, along the soft water flow direction, sequentially includes a main inlet valve, an automatic interlocking pump assembly, a primary measuring component, a cooling submodule, another primary measuring component, and a main outlet valve. The main inlet valve connects the main measuring component and the cooling wall inlet of the blast furnace body, and the main outlet valve is connected to the outlet end of the main water collection pipe via a return water pipe. The cooling submodule includes multiple cooling units connected in parallel. This system effectively improves the water quality of the hot blast stove cooling water, reduces scaling and corrosion rates, and avoids the impact of equipment replacement on production.

The invention belongs to the technical field of hot air pipeline equipment, and particularly relates to a hot air pipeline pull rod device with a compensation function, which comprises a first seat ring, a second seat ring and a third seat ring, the second seat ring is fixed on the outer wall, far away from the blind end, of the hot air pipeline; the compensation mechanism is fixed to the end face, close to the blind end of the hot air pipeline, of the first seat ring. The axis direction of the pull rods is parallel to the axis direction of the hot air pipeline, the pull rods are evenly arranged outside the hot air pipeline in the circumferential direction of the hot air pipeline and sequentially penetrate through the compensation mechanism, the first seat ring and the second seat ring, and the two ends of the pull rods are correspondingly connected with the compensation mechanism and the second seat ring. The problems that an existing compensator is complex in construction technology, pipeline integrity is damaged, the engineering cost is high, and the structural complexity of a hot air pipeline system is increased are solved.

The invention discloses a blast furnace blower drying maintenance system using air source back flushing and a method thereof. The blast furnace blower drying maintenance system comprises a main fan, a standby fan, an air inlet pipe, a reversing valve I, a first air outlet pipe, a second air outlet pipe, a delivery header pipe and a reversing valve II. The reversing valve I and the reversing valve II are two-position three-way electromagnetic reversing valves, the air inlet pipe is communicated with an air inlet P of the reversing valve I, a working port A of the reversing valve I is communicated with an air inlet of the main fan, and a working port B of the reversing valve I is communicated with an air inlet of the standby fan; an air outlet of the main fan communicates with the delivery header pipe through a first air outlet pipe, and an air outlet of the standby fan communicates with the delivery header pipe through a second air outlet pipe; an air inlet P of the reversing valve II is communicated with the delivery header pipe, a working port A of the reversing valve II is communicated with an air outlet of the standby fan through a pipeline, and a working port B of the reversing valve II is communicated with an air outlet of the main fan through a pipeline. The anti-rust maintenance can be completed on the premise of not starting or switching the standby fan, and the continuity and stability of the blast furnace smelting process are guaranteed.

The utility model discloses flue gas desulfurization equipment for a blast furnace hot blast stove, which comprises a desulfurization tower, a flue gas inlet pipe and a limestone solution storage tank, the flue gas inlet pipe is welded on one side of the lower end of the desulfurization tower, the limestone solution storage tank for storing alkaline solution is erected at the lower end of the desulfurization tower, and the lower end of the limestone solution storage tank is communicated with a settling tank. A demisting tower is erected on the desulfurizing tower along the upper part of the conveying pipeline, a smoke outlet pipeline is erected at the top of the upper end of the desulfurizing tower, and gas conveying nozzles for conveying pressurized air penetrate through the periphery of the inner wall of the settling tank. When the flue gas desulfurization equipment for the blast furnace hot blast stove is used, the bracket is used as a supporting part and is connected with a desulfurization tower in a welding connection manner, the connection strength is high, the structure is stable, the requirement that the desulfurization tower is stably erected at a preset position of a plant is met, and the long-term use of the desulfurization tower is ensured.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 900° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, thermal energy storage systems are used to improve efficiency and reduce carbon emissions associated with processing materials or other industrial applications.

The invention relates to the technical field of ironmaking processes, in particular to a method for controlling the content of nitric oxide in exhaust gas of a hot blast stove. The method comprises the following steps: S1, when the hot-blast stove burns, the gas flow of a single stove is less than or equal to 150,000 / h, and the total flow is less than or equal to 600,000 / h when two stoves are simultaneously burnt; s2, adjusting the flow of combustion air and gas, and controlling the vault temperature to be less than or equal to 1350 DEG C; and S3, adjusting the frequency of an induced draft fan according to the amount of flue gas in the furnace, and stabilizing the negative pressure to be-0.2 to-0.5 kPa. According to the method, denitration equipment such as SCR (Selective Catalytic Reduction) and SNCR (Selective Non-Catalytic Reduction) does not need to be additionally arranged, fuel type nitrogen oxide is reduced by controlling the gas flow, thermal type nitrogen oxide under high temperature and high oxygen is prevented from being generated massively by controlling the vault temperature, the nitrogen oxide can be reduced from 220-260mg / N to be less than or equal to 180mg / N under the condition of meeting the high blast temperature requirement of the blast furnace, the national ultralow emission requirement is met, and the investment and operation and maintenance cost of the denitration equipment is reduced.

The invention belongs to the technical field of metallurgical equipment control, and particularly provides a heat storage control method for an internal combustion hot blast stove, which comprises the following steps: acquiring the pressure of a first header pipe in a gas delivery pipeline of the internal combustion hot blast stove; according to the first main pipe pressure, the second main pipe pressure in a combustion air conveying pipeline of the internal combustion hot blast stove is adjusted; according to the lattice brick specification of the internal combustion hot blast stove and the process parameters of the internal combustion hot blast stove, the critical flue gas flow of the internal combustion hot blast stove is determined; according to the technological parameters, the total furnace burning time of the internal combustion type hot blast stove is determined, and the total furnace burning time is divided into a turbulent flow time period and a laminar flow time period based on the periodic heat storage amount and the heat storage time of the internal combustion type hot blast stove; and controlling the flow of flue gas flowing through the checker bricks according to the time period of the internal combustion hot blast stove and the critical flue gas flow. According to the technical scheme, the heat storage efficiency of the internal combustion type hot blast stove can be improved.

The present invention relates to a method for operating a blast furnace plant (1) including a blast furnace (10), at least one material hopper (20) having an upper seal valve (21) and a lower seal valve (22) for charging raw materials into the blast furnace (10), and at least one hot stove (30) for generating hot air for the blast furnace (10), the method including at least one charging cycle including the steps of opening the upper seal valve (21), introducing raw materials into the material hopper (20), closing the upper seal valve (21), equalizing the pressure between the material hopper and the top of the blast furnace, and opening the lower seal valve (22) to discharge the raw materials into the blast furnace (10). In order to provide a cost-effective method for minimizing the risk of explosion during operation of a top charging system, the present invention allows for the transfer of off-gas from at least one hot stove (30) by a transfer system (40) to at least one material hopper (20) and for the off-gas to be injected into the material hopper (20) before the bottom seal valve (22) is opened.

The invention belongs to the technical field of metallurgy, and particularly relates to a signal interference prevention method for automatic burning of a metallurgy hot blast stove. Comprising the following steps: S1, collecting an analog quantity signal of a field instrument, and converting the analog quantity signal into an engineering value; s2, judging whether the engineering value is in a preset normal working range or not; s3, if the engineering value is within the normal working range, outputting the engineering value for control; s4, if the engineering value exceeds the normal working range, starting a multi-dimensional interference judgment process; and S5, executing a corresponding output strategy according to a multi-dimensional judgment result. According to the method, by combining two-dimensional criteria of'time window restorative monitoring 'and'fluctuation characteristic mode matching' and introducing'multi-signal cooperative verification ', instantaneous interference and real abnormity can be distinguished at extremely high precision, and the misjudgment rate is greatly reduced.