CN114657294A - Experimental method and device for simulating combustion of blast furnace injection fuel - Google Patents
Experimental method and device for simulating combustion of blast furnace injection fuel Download PDFInfo
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- CN114657294A CN114657294A CN202210333012.0A CN202210333012A CN114657294A CN 114657294 A CN114657294 A CN 114657294A CN 202210333012 A CN202210333012 A CN 202210333012A CN 114657294 A CN114657294 A CN 114657294A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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Abstract
The invention provides an experimental method and device for simulating combustion of blast furnace injection fuel, which comprises a high-temperature gas generating unit, a high-temperature gas accelerating unit, an injection fuel combustion unit and a tail gas cooling and purifying unit which are sequentially communicated and coaxially arranged. The high-temperature gas generation unit simulates blast furnace blowing hot air and the oxygen content thereof; the high-temperature gas accelerating unit simulates the speed of hot air; the fuel injection combustion unit simulates the fuel injection process in the blast furnace; the tail gas cooling and purifying unit cools and purifies the flue gas. The method can truly simulate the blast furnace injection process, reflect the actual combustion condition of the blast furnace injection fuel in the tuyere, is beneficial to analyzing the characteristics and the change rule of the injection fuel in the tuyere convolution region, and realizes the accurate control of the combustion behavior of the tuyere convolution region in the production process; and the blowing process parameters are continuously regulated and controlled according to the simulation result, so that reasonable process parameters are provided for blast furnace blowing, and the method has important guiding significance for the actual production of blast furnace blowing.
Description
Technical Field
The invention relates to the technical field of blast furnace ironmaking, in particular to an experimental method and device for simulating combustion of blast furnace injection fuel.
Background
The blast furnace coal powder injection is an important measure for relieving coke and coal resource shortage and reducing coke ratio and production cost of iron and steel enterprises at present, and is the mainstream trend of the development of iron-making technology in the world. Research and production practices prove that the blast furnace can inject auxiliary fuel to replace 30 percent or more of coke consumed in the blast furnace smelting process; therefore, the blast furnace injection fuel can effectively reduce the production cost of the ton iron, increase the coal gas amount of the ton iron, improve the energy supply problem of the iron and steel combined production enterprise, improve the economic benefit of the enterprise and reduce the environmental pressure. The types of the pulverized coal injected into the blast furnace are gradually changed from the traditional high-quality anthracite into the mixed injection of bituminous coal, anthracite, poor lean coal, semi-coke, upgraded coal and the like. How to improve the combustion rate of the fuel such as the pulverized coal injected into the blast furnace in front of the tuyere is an important index for measuring the performance of different types of fuel and evaluating the combustion condition of the tuyere of the blast furnace, and the important work of smelting the blast furnace when the injected fuel is combusted in front of the tuyere is strengthened.
The combustion process of the fuel such as pulverized coal injected by the blast furnace in front of the tuyere is very complicated, and is a gas-solid combustion reaction in a high-temperature, high-pressure and turbulent flow state. The actual combustion conditions of the injected fuels such as pulverized coal and the like in the tuyere are measured in the production field of the blast furnace, and particularly the control difficulty of a tuyere convolution area is very high; at present, the determination of the combustion condition of the pulverized coal in front of the tuyere is basically model calculation, and the combustion rate of fuels such as the injected pulverized coal and the like in front of the tuyere is generally calculated through numerical simulation or carbon content (lithofacies analysis) in blast furnace dust. Due to lack of experimental verification, the results of the calculation cannot truly reflect the actual combustion condition of the blast furnace injection fuel at the tuyere. Particularly, under the condition that the 'double-carbon' strategy is implemented in the current iron and steel industry, the influence of hydrogen-rich gas injection on the combustion behavior of solid fuels such as pulverized coal injected into a blast furnace is not detected by a related experimental method and a related experimental device. Therefore, the research of the combustion simulation experiment method and the device for different fuels injected by the blast furnace is the key for realizing the improvement of the combustion efficiency of the fuel injected by the blast furnace in front of a tuyere, the improvement of the fuel injection amount, the enhancement of blast furnace smelting and the reduction of the coke ratio and the production cost of the blast furnace smelting.
In view of the above, there is a need for an improved experimental method and apparatus for simulating the combustion of injected fuel in a blast furnace to solve the above problems.
Disclosure of Invention
The invention aims to provide an experimental method and device for simulating combustion of blast furnace injection fuel, which can realize simulation of combustion process of injection fuel in a tuyere small sleeve and a tuyere convolution area of a blast furnace by simulating injection amount, temperature, oxygen content and hot air speed of blast furnace hot air, and carry out cooling, purification and smoke component detection on the obtained high-temperature tail gas. The invention has the characteristics of accurate experimental result, simple structure, convenient operation, flexible adjustment and stable operation; the method can truly simulate the whole blast furnace injection process, reflect the actual combustion condition of the blast furnace injection fuel in the tuyere, is beneficial to analyzing the characteristics and the change rule of the injection fuel in the tuyere convolution region, and realizes the accurate control of the combustion behavior of the tuyere convolution region in the production process; and the blowing process parameters are continuously regulated and controlled according to the simulation result, so that reasonable process parameters are provided for blast furnace blowing, and the method has important guiding significance for the actual production of blast furnace blowing.
In order to achieve the aim, the invention provides an experimental method and device for simulating the combustion of blast furnace injection fuel, wherein the experimental device for simulating the combustion of the blast furnace injection fuel comprises a high-temperature gas generation unit, a high-temperature gas acceleration unit, an injection fuel combustion unit and a tail gas cooling and purifying unit which are sequentially communicated and coaxially arranged; the high-temperature gas generating unit is provided with a hot air conveying unit and an oxygen blowing unit, so that the simulation of oxygen content of blast furnace blowing hot air and hot air is realized; the high-temperature gas accelerating unit realizes the simulation of the hot air speed of the blast furnace; the fuel injection combustion unit is provided with a solid fuel injection device and a gas fuel injection device, so that the injection process of the solid fuel and the gas fuel in the blast furnace is simulated; the tail gas cooling and purifying unit cools and purifies the high-temperature flue gas;
and the high-temperature high-pressure oxygen-containing gas generated by the high-temperature gas generation unit is conveyed to the high-temperature gas acceleration unit for acceleration, the obtained high-temperature high-speed oxygen-containing gas is conveyed to the fuel injection combustion unit, is in contact combustion with injected fuel solid and gas fuel, and the obtained high-temperature flue gas enters the tail gas cooling and purifying unit for cooling and purifying.
As a further improvement of the invention, the hot air delivery unit comprises a gas delivery unit, an oxygen delivery unit and a premixing chamber for mixing gas and combustion-supporting oxygen; the oxygen blowing unit comprises a combustion chamber, a first oxygen concentration adjusting spray gun and a second oxygen concentration adjusting spray gun which are arranged on the side wall of the combustion chamber; the premixing chamber is communicated with the combustion chamber, an ignition hole is formed in the side wall of the premixing chamber, and an ignition device is installed in the ignition hole and used for igniting gas and combustion-supporting oxygen in the premixing chamber to generate high-temperature and high-pressure flue gas; and the high-temperature high-pressure flue gas enters the combustion chamber and is combined with oxygen blown by the first oxygen concentration adjusting spray gun and the second oxygen concentration adjusting spray gun to obtain high-temperature high-pressure oxygen-containing gas, so that the simulation of the temperature of hot blast of the blast furnace and the oxygen content of the hot blast is realized.
As a further improvement of the present invention, the fuel-injection combustion unit is further provided with a fuel combustion chamber communicated with the high-temperature gas acceleration unit; the side wall of the fuel combustion chamber is provided with a plurality of thermocouples for detecting the temperature of high-temperature high-speed oxygen-containing gas and the temperature of injected fuel before and after combustion; the solid fuel injection device and the gas fuel injection device are arranged on the side wall of the fuel combustion chamber, so that solid fuel and gas fuel are quickly and uniformly conveyed into the fuel combustion chamber and are in contact combustion with high-temperature high-speed oxygen-containing gas conveyed by the high-temperature gas accelerating unit, and the simulation of the combustion process of the injected fuel of the blast furnace is realized.
As a further improvement of the invention, the high-temperature gas accelerating unit is provided with a mixing chamber, a throat pipe and an expansion chamber which are communicated in sequence; the mixing chamber is connected with the combustion chamber of the high-temperature gas generation unit, the expansion chamber is communicated with the fuel injection combustion unit, and the high-temperature high-pressure oxygen-containing gas conveyed by the high-temperature gas generation unit is accelerated to obtain high-temperature high-speed oxygen-containing gas, so that the simulation of the hot air speed of the blast furnace is realized.
As a further improvement of the invention, the tail gas cooling and purifying unit is provided with a spray dust removal cooling chamber communicated with the injection fuel combustion unit; the upper part of the side edge of the spray dedusting cooling chamber is provided with a spray cooling water pipe and a spray cooling nozzle, the spray cooling water pipe is externally connected with cooling water and is communicated with the spray cooling nozzle, so that the high-temperature tail gas is cooled; the top of the tail end of the spray dust removal cooling chamber is provided with a combustion tail gas outlet, and the bottom of the spray dust removal cooling chamber is provided with a dust removal cooling waste liquid outlet; and the dust removal cooling waste liquid outlet is used for discharging waste liquid which is collected to the bottom of the spray dust removal cooling chamber after absorbing unburned solid particles in high-temperature flue gas.
As a further improvement of the invention, the gas conveying unit comprises a gas channel and a gas nozzle which are communicated in sequence, and the gas nozzle extends into the premixing chamber; the oxygen conveying unit comprises a combustion-supporting oxygen channel, a combustion-supporting oxygen chamber and an oxygen nozzle which are communicated; the combustion-supporting oxygen chamber is coaxially arranged at the outer sides of the gas channel and the gas nozzle, and the oxygen nozzle is coaxially arranged at the outer side of the gas nozzle so as to improve the mixing property of gas and oxygen.
As a further improvement of the invention, the high-temperature gas generating unit, the high-temperature gas accelerating unit and the fuel injection combustion unit are all provided with cooling devices, and cooling water is introduced to cool high-temperature parts of the equipment.
An experimental method for simulating the combustion of the blast furnace injection fuel by adopting the experimental device for simulating the combustion of the blast furnace injection fuel, which comprises the following steps:
s1, connecting high-pressure hydrogen to a fuel gas nozzle through a pipeline, and respectively connecting high-pressure industrial pure oxygen to an oxygen nozzle, a first oxygen concentration adjusting spray gun and a second oxygen concentration adjusting spray gun through pipelines; connecting a pulverized coal fluidization conveying pipeline with a solid fuel injection device, connecting an air supply pipeline with a gas fuel injection device, connecting a cooling water pipeline with a spray cooling water pipe, and connecting a combustion tail gas outlet with tail gas component detection equipment; opening cooling devices of the high-temperature gas generating unit, the high-temperature gas accelerating unit and the injected fuel combustion unit, and introducing cooling water for cooling;
s2, opening an oxygen pipeline of the high-temperature gas generation unit to supply gas to the oxygen nozzle, switching on an igniter, opening a gas pipeline to supply gas to the gas nozzle, and turning off the igniter after igniting the mixed gas; adjusting the injection amount of oxygen and fuel gas to stabilize the flame combustion state in the combustion chamber, and opening the first oxygen concentration adjusting spray gun and the second oxygen concentration adjusting spray gun to adjust the concentration of the flue gas at the outlet end of the combustion chamber; the stable combustion of combustion flame and the adjustment of combustion tail gas temperature and oxygen concentration are realized by controlling the gas flow in the gas burner, the oxygen burner, the first oxygen concentration adjusting spray gun and the second oxygen concentration adjusting spray gun so as to simulate blast furnace blowing hot air;
s3, accelerating the high-temperature flue gas generated by the high-temperature gas generation unit through a mixing chamber, a throat pipe and an expansion chamber of the high-temperature gas acceleration section to obtain high-temperature high-speed oxygen-containing gas; the velocity of the high-temperature high-velocity oxygen-containing gas is more than 50m/s, preferably more than 200 m/s;
s4, blowing solid fuel from the solid fuel blowing device of the fuel-blowing combustion unit to the fuel combustion chamber, and blowing gas fuel from the gas fuel blowing device to the fuel combustion chamber; the solid fuel and the gas fuel which are sprayed out at high speed contact with the high-temperature high-speed oxygen-containing gas for combustion, so that the simulation of the combustion process of the injected fuel in a tuyere small sleeve and a tuyere convolution region of the blast furnace is realized;
s5, opening a spray cooling water pipe of the tail gas cooling and purifying unit, and carrying out spray cooling on the high-temperature tail gas generated by the fuel injection combustion unit; and the purified tail gas enters the tail gas component detection equipment through the combustion tail gas outlet, cooling water for adsorbing unburned solid particles in the high-temperature flue gas is converged to the bottom of the spray dedusting cooling chamber, and is discharged through a dedusting cooling waste liquid outlet.
As a further improvement of the present invention, in step S4, the speed of injecting the solid fuel in the solid fuel injection device is greater than 5m/S,preferably more than 20m/s, the flow rate is more than 5 g/min; the speed of the gas fuel injected in the gas fuel injection device is more than 5m/s, preferably more than 20m/s, and the flow rate is more than 5cm3Min; the solid fuel and the gas fuel can be injected separately or simultaneously.
As a further improvement of the invention, the combustion tail gas outlet is sequentially connected with a gas drying device and tail gas component detection equipment for component detection of combustion flue gas; the dust removal cooling waste liquid outlet is connected with a filtering device, unburned carbon residue particles are filtered out and then dried, and experimental samples are provided for the combustion mechanism analysis of different fuels injected by the blast furnace.
The beneficial effects of the invention are:
1. the invention relates to an experimental method and a device for simulating combustion of blast furnace injection fuel, wherein the device comprises a high-temperature gas generating unit, a high-temperature gas accelerating unit, an injection fuel combustion unit and a tail gas cooling and purifying unit which are sequentially and coaxially arranged in an annular manner; the high-temperature gas generation unit realizes the simulation of the oxygen content of the blast furnace blowing hot air and the blast air through the hot air conveying unit and the oxygen blowing unit; the high-temperature gas acceleration unit realizes the simulation of the hot air speed of the blast furnace; the injection fuel combustion unit realizes the simulation of the injection process of solid fuel and gas fuel in the blast furnace; and the tail gas cooling and purifying unit cools and purifies the high-temperature flue gas. The device has the advantages of safety, convenient operation, flexible adjustment and stable operation; the method can truly simulate the whole process of blast furnace injection, completely simulate according to the actual blast furnace injection process, adjust parameters through injection result analysis, further provide reasonable process parameters for the blast furnace injection process, and have important guiding significance for the actual production of blast furnace injection.
2. The experimental device for simulating the combustion of the blast furnace injection fuel can truly reflect the actual combustion condition of the blast furnace injection fuel at the tuyere, is beneficial to analyzing the characteristics and the change rule of the injection fuel in the tuyere convolution region by simulating the combustion process of the injection fuel in the tuyere small sleeve and the tuyere convolution region of the blast furnace, and has important significance for creating the optimized blast furnace smelting condition, realizing the accurate control of the combustion behavior of the tuyere convolution region in the production process and effectively exerting the advantages of the blast furnace production.
3. The experimental method for simulating the combustion of the blast furnace injection fuel is based on an experimental device for truly simulating the process of the blast furnace injection fuel, and the obtained high-temperature tail gas is cooled, purified and subjected to smoke component detection by simulating the injection amount, temperature, oxygen content and hot air speed of the blast furnace hot air and simulating the combustion process of the injection fuel in a tuyere small sleeve and a tuyere convolution region of the blast furnace; meanwhile, the combustion rates of different solid fuels blown by the blast furnace can be measured, and the influence rule of oxygen enrichment rate, blast temperature and hydrogen-rich gas blowing on the combustion rate of the solid fuels blown by the blast furnace can be detected; and the blowing process parameters are continuously regulated and controlled according to the detection result, so that reasonable process parameters are provided for actual blast furnace blowing. The experimental result of the invention is accurate, and becomes the key for improving the combustion efficiency of the blast furnace injection fuel in front of the tuyere, improving the fuel injection amount, strengthening the blast furnace smelting and reducing the blast furnace smelting coke ratio and the production cost.
Drawings
FIG. 1 is a schematic structural diagram of an experimental device for simulating combustion of blast furnace injection fuel according to the present invention.
FIG. 2 is a schematic structural diagram of a high-temperature gas generation unit of the experimental apparatus for simulating combustion of injected fuel in a blast furnace according to the present invention.
Reference numerals
100-a high temperature gas generation unit; 110-a hot air delivery unit; 111-a gas channel; 112-a gas nozzle; 113-a premix chamber; 114-combustion supporting oxygen channel; 115 combustion supporting oxygen chamber; 116-an oxygen nozzle; 120-oxygen blowing unit; 121-a combustion chamber; 122-a first oxygen concentration adjustment lance; 123-a second oxygen concentration adjusting spray gun; 130-ignition hole; 200-a high temperature gas acceleration unit; 210-a mixing chamber; 220-a throat pipe; 230-an expansion chamber; 300-a fuel-injected combustion unit; 310-a solid fuel injection device; 320-a gas fuel injection device; 330-a fuel combustion chamber; 340-a thermocouple; 400-a tail gas cooling and purifying unit; 410-spray dedusting cooling chamber; 420-spray cooling water pipe; 430-spray cooling nozzles; 440-combustion exhaust outlet; 450-dust removal cooling waste liquid outlet; 511-burner cooling water inlet; 512-burner cooling water outlet; 513-burner cooling water channels; 521-a combustion chamber cooling water inlet; 522-combustion chamber cooling water outlet; 523-combustion chamber cooling water channel; 531-cooling water inlet of the acceleration section; 532-cooling water outlet of acceleration section; 533-cold water channel of acceleration section; 541-cooling water inlet of fuel injection combustion section; 542-cooling water outlet of the fuel-injection combustion section; 543-blowing fuel combustion section cooling water channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, an experimental apparatus for simulating combustion of injected fuel in a blast furnace includes a high-temperature gas generating unit 100, a high-temperature gas accelerating unit 200, an injected fuel combustion unit 300, and a tail gas cooling and purifying unit 400, which are coaxially arranged in an annular shape; the high-temperature gas generating unit 100 is provided with a hot air conveying unit 110 and an oxygen blowing unit 120, so that the simulation of the oxygen content of blast furnace blowing hot air and hot air is realized; the high-temperature gas acceleration unit 200 realizes the simulation of the hot air speed of the blast furnace; the injection fuel combustion unit 300 is provided with a solid fuel injection device 310 and a gas fuel injection device 320, so as to realize the simulation of the injection process of the solid fuel and the gas fuel in the blast furnace; the tail gas cooling and purifying unit 400 cools and purifies the high temperature flue gas.
Specifically, the high-temperature high-pressure oxygen-containing gas generated by the high-temperature gas generation unit 100 is delivered to the high-temperature gas acceleration unit 200 for acceleration, the obtained high-temperature high-speed oxygen-containing gas is delivered to the fuel injection combustion unit 300, and is combusted by contacting with injected fuel solids and gas fuel, and the obtained high-temperature flue gas enters the tail gas cooling and purifying unit 400 for cooling and purifying. The device has the advantages of safety, convenient operation, flexible adjustment and stable operation; the method can truly simulate the whole process of blast furnace injection, completely simulate according to the actual blast furnace injection process, adjust parameters through injection result analysis, further provide reasonable process parameters for the blast furnace injection process, and have important guiding significance for the actual production of blast furnace injection.
Particularly, the high-temperature gas generation unit 100, the high-temperature gas acceleration unit 200 and the fuel injection combustion unit 300 are respectively provided with a cooling device, and cooling water is introduced to cool high-temperature parts of the equipment; when the simulation experiment is carried out, the temperature in the high-temperature part reaches more than 1000 ℃, and the safety of the simulation experiment device can be ensured through the cooling effect of the cooling water.
The cooling device specifically comprises a burner cooling assembly, a combustion chamber cooling assembly, an accelerating unit cooling assembly and a dye combustion chamber cooling assembly; the burner cooling component comprises a burner cooling water inlet 511, a burner cooling water outlet 512 and a burner cooling water channel 513; the combustion chamber cooling assembly comprises a combustion chamber cooling water inlet 521, a combustion chamber cooling water outlet 522 and a combustion chamber cooling water channel 523; the acceleration unit cooling assembly comprises an acceleration section cooling water inlet 531, an acceleration section cooling water outlet 532 and an acceleration section cooling water channel 533; the dye combustion chamber cooling assembly comprises a fuel injection combustion section cooling water inlet 541, a fuel injection combustion section cooling water outlet 542 and a fuel injection combustion section cooling water channel 543. The cooling device of each part is locally arranged, so that the input and output of cooling water can be more efficiently carried out, and the cooling effect is prevented from being reduced due to the fact that the cooling water stays for too long time in the high-temperature part; the cooling device arranged in this way can achieve a better cooling effect on the equipment.
Specifically, the hot air delivery unit 110 includes a gas delivery unit, an oxygen delivery unit, and a premixing chamber 113 for mixing gas and combustion-supporting oxygen; the oxygen blowing unit 120 includes a combustion chamber 121, a first oxygen concentration adjusting lance 122 and a second oxygen concentration adjusting lance 123 installed at a side wall of the combustion chamber 121; the premixing chamber 113 is communicated with the combustion chamber 121, an ignition hole 130 is formed in the side wall of the premixing chamber 113, an ignition device is installed in the ignition hole 130, and fuel gas and combustion-supporting oxygen in the premixing chamber 113 are ignited to generate high-temperature and high-pressure flue gas; the high-temperature high-pressure flue gas enters the combustion chamber 121 and is combined with oxygen blown by the first oxygen concentration adjusting spray gun 122 and the second oxygen concentration adjusting spray gun 123 to obtain high-temperature high-pressure oxygen-containing gas, so that the simulation of the temperature of hot blast of the blast furnace and the oxygen content of the hot blast is realized.
In practical application, after the fuel gas and the oxygen provided by the hot air delivery unit 110 are mixed in the premixing chamber 113, ignition is performed under the action of an ignition device, and the mixture of the fuel gas and the combustion-supporting oxygen in the premixing chamber 113 is ignited; and the oxygen blowing unit 120 is used for adjusting the oxygen content, and the combustion reaction is carried out in the combustion chamber 121 to generate high-temperature and high-pressure flue gas. So set up, adjust spray gun 122 and second oxygen concentration through first oxygen concentration and adjust spray gun 123, realize the oxygen content in the accurate control high temperature high pressure flue gas, adjust the oxygen concentration in the combustion products.
Referring to fig. 2, the gas delivery unit includes a gas channel 111 and a gas nozzle 112, which are sequentially communicated, and the gas nozzle 112 extends into the premixing chamber 113; the oxygen delivery unit comprises a combustion-supporting oxygen channel 114, a combustion-supporting oxygen chamber 115 and an oxygen nozzle 116 which are communicated; the combustion-supporting oxygen chamber 115 is coaxially arranged outside the gas channel 111 and the gas nozzle 112, and the oxygen nozzle 116 is coaxially arranged outside the gas nozzle 112 to improve the mixing property of the gas and the oxygen. The gas nozzle 112 extends into the premixing chamber 113, the outer diameter of the gas nozzle is smaller than the inner diameter of the inlet end of the premixing chamber 113, and a gap formed between the gas nozzle and the premixing chamber is an oxygen nozzle 116; through the coaxial nested arrangement of the gas nozzle 112 and the oxygen nozzle 116, the gas and the oxygen are primarily mixed before entering the premixing chamber 113, so that the mixing uniformity of the gas and the oxygen is improved.
In one embodiment, the gas nozzle 112 may be a laval nozzle structure, which may provide a continuous acceleration of the gas passing through the gas nozzle 112.
The high-temperature gas acceleration unit 200 is provided with a mixing chamber 210, a throat pipe 220 and an expansion chamber 230 which are communicated in sequence; the mixing chamber 210 is connected to the combustion chamber 121 of the high-temperature gas generation unit 100, and the expansion chamber 230 is communicated with the fuel injection combustion unit 300 to accelerate the high-temperature high-pressure oxygen-containing gas delivered by the high-temperature gas generation unit 100, thereby obtaining a high-temperature high-speed oxygen-containing gas and realizing the simulation of the blast furnace hot air speed.
Specifically, the injection fuel combustion unit 300 is further provided with a fuel combustion chamber 330 communicating with the high-temperature gas acceleration unit 200; a plurality of thermocouples 340 are arranged on the side wall of the fuel combustion chamber 330 and used for detecting the temperature before and after the combustion of the high-temperature high-speed oxygen-containing gas and the injected fuel; the solid fuel injection device 310 and the gas fuel injection device 320 are arranged on the side wall of the fuel combustion chamber 330, so that the solid fuel and the gas fuel are quickly and uniformly delivered into the fuel combustion chamber 330 and are in contact combustion with the high-temperature high-speed oxygen-containing gas delivered by the high-temperature gas generation unit 100 and the high-temperature gas acceleration unit 200, and the simulation of the combustion process of the blast furnace injection fuel is realized.
In a specific embodiment, the number of the thermocouples 340 is more than 2, and the thermocouples are uniformly arranged on the side wall of the fuel combustion chamber 330 for detecting the temperature of the high-temperature high-speed oxygen-containing gas before and after the combustion of the injected fuel, and adjusting the injection amount and the injection ratio of the fuel. The solid fuel injection device 310 is a solid fuel spray gun, and is externally connected with a solid fuel supply device, so that the solid fuel is quickly and uniformly conveyed to the injection fuel combustion unit 300 to be in contact combustion with high-temperature high-speed oxygen-containing gas; the gas fuel injection device 320 is a gas fuel spray gun, and is externally connected with a gas supply device, so that the gas fuel is quickly and uniformly delivered to the injection fuel combustion unit 300 to be in contact combustion with high-temperature high-speed oxygen-containing gas.
The tail gas cooling and purifying unit 400 is provided with a spray dedusting cooling chamber 410 communicated with the fuel injection combustion unit 300; the upper part of the side edge of the spray dedusting cooling chamber 410 is provided with a spray cooling water pipe 420 and a spray cooling nozzle 430, the spray cooling water pipe 420 is externally connected with cooling water and is communicated with the spray cooling nozzle 430, so that the high-temperature tail gas is cooled; the top of the tail end of the spray dedusting and cooling chamber 410 is provided with a combustion tail gas outlet 440, and the bottom is provided with a dedusting and cooling waste liquid outlet 450; the cooling waste liquid outlet 450 discharges waste liquid which is collected to the bottom of the spray dedusting cooling chamber 410 after absorbing unburned solid particles in high-temperature flue gas.
An experimental method for simulating the combustion of the blast furnace injection fuel by adopting the experimental device for simulating the combustion of the blast furnace injection fuel comprises the following steps:
s1, connecting high-pressure hydrogen to the gas nozzle 112 through a pipeline, and respectively connecting high-pressure industrial pure oxygen to the oxygen nozzle 116, the first oxygen concentration adjusting spray gun 122 and the second oxygen concentration adjusting spray gun 123 through pipelines; connecting a pulverized coal fluidization conveying pipeline with a solid fuel injection device 310, connecting an air supply pipeline with a gas fuel injection device 320, connecting a cooling water pipeline with a spray cooling water pipe 420, and connecting a combustion tail gas outlet 440 with tail gas component detection equipment; opening cooling devices of the high-temperature gas generation unit 100, the high-temperature gas acceleration unit 200 and the injected fuel combustion unit 300, and introducing cooling water for cooling;
s2, opening an oxygen pipeline of the high-temperature gas generation unit 100 to supply gas to the oxygen nozzle 116, switching on an igniter, opening a gas pipeline to supply gas to the gas nozzle 112, and turning off the igniter after igniting the mixed gas; adjusting the injection amount of oxygen and fuel gas to stabilize the combustion state of flame in the combustion chamber 121, and opening the first oxygen concentration adjusting spray gun 122 and the second oxygen concentration adjusting spray gun 123 to adjust the concentration of the flue gas at the outlet end of the combustion chamber 121; the stable combustion of combustion flame and the adjustment of combustion tail gas temperature and oxygen concentration are realized by controlling the gas flow in the gas burner 112, the oxygen burner 116, the first oxygen concentration adjusting spray gun 122 and the second oxygen concentration adjusting spray gun 123 so as to simulate blast furnace injection hot air;
s3, accelerating the high-temperature flue gas generated by the high-temperature gas generation unit 100 through the mixing chamber 210, the throat pipe 220 and the expansion chamber 230 of the high-temperature gas acceleration section 200 to obtain high-temperature high-speed oxygen-containing gas; the velocity of the high-temperature high-velocity oxygen-containing gas is greater than 50m/s, preferably greater than 200 m/s;
s4, blowing solid fuel from the solid fuel blowing device 310 of the fuel-blowing combustion unit 300 to the fuel combustion chamber 330, and blowing gas fuel from the gas fuel blowing device 320 to the fuel combustion chamber 330; the solid fuel and the gas fuel sprayed at high speed contact with high-temperature high-speed oxygen-containing gas for combustion, so that the simulation of the combustion process of the injected fuel in a tuyere small sleeve and a tuyere convolution region of the blast furnace is realized;
wherein, the speed of the solid fuel injected in the solid fuel injection device 310 is more than 5m/s, preferably more than 20m/s, and the flow rate is more than 5 g/min; the gas fuel injection device 320 injects the gas fuel at a velocity of more than 5m/s, preferably more than 20m/s, and at a flow rate of more than 5cm3Min; the solid fuel and the gas fuel can be independently injected or simultaneously injected, and can be specifically set according to the actual blast furnace production requirement to be researched;
s5, opening the spray cooling water pipe 420 of the exhaust gas cooling and purifying unit 400, and spray cooling the high-temperature exhaust gas generated from the fuel injection combustion unit 300; the purified tail gas enters the tail gas component detection equipment through the combustion tail gas outlet 440, and cooling water for adsorbing unburned solid particles in the high-temperature flue gas is gathered at the bottom of the spray dedusting cooling chamber 410 and is discharged through the dedusting cooling waste liquid outlet 450.
Specifically, the combustion tail gas outlet 440 is sequentially connected with a gas drying device and tail gas component detection equipment for component detection of combustion flue gas; the tail gas component detection equipment is an online gas analyzer which can detect CO in the flue gas2、CO、H2、CH4And O2The content; in addition, the combustion rate of the injected solid fuel under different conditions is obtained by calculation according to the increase of carbon element in the smoke component detection data. The dust removal cooling waste liquid outlet 450 is connected with a filtering device, and unburned carbon residue particles are filtered out and then dried, so that experimental samples are provided for the combustion mechanism analysis of different fuels injected into the blast furnace.
In a specific embodiment, the fuel used by the gas burner 112 is one or more of natural gas, artificial gas, and liquefied gas; the combustion-supporting oxygen used by the oxygen burner 116 is one or a mixture of industrial pure oxygen and compressed air.
In some specific embodiments, the solid fuel is one or more mixtures of pulverized coal, semi coke, upgraded coal, biomass, waste plastic, biomass char, and semicoke; the gas fuel is one or a mixture of hydrogen, natural gas, coke oven gas and liquefied gas.
The invention can truly reflect the actual combustion condition of the blast furnace injection fuel at the tuyere through the experimental device for simulating the combustion of the blast furnace injection fuel; because the diameter and the height of a material layer in the furnace of the large-scale blast furnace are both larger, the forming and reaction process of the tuyere raceway is particularly important for reasonably controlling the temperature in the furnace and the components of coal gas, and the forming and reaction process of the tuyere raceway in the large-scale blast furnace is difficult to study; therefore, the method is beneficial to analyzing the characteristics and the change rule of the injected fuel in the tuyere raceway by simulating the combustion process of the injected fuel in the tuyere small sleeve and the tuyere raceway of the blast furnace, and has important significance for creating optimized blast furnace smelting conditions, realizing accurate control of the combustion behavior of the tuyere raceway in the production process and effectively exerting the advantages of blast furnace production.
Example 1
The invention provides an experimental method for simulating combustion of blast furnace injection fuel based on an experimental device for simulating combustion of blast furnace injection fuel, which comprises the following steps:
s1, connecting high-pressure hydrogen (purity 99.9%) to the gas nozzle 112 through a pipeline, and connecting high-pressure industrial pure oxygen (purity 99.9%) to the oxygen nozzle 116, the first oxygen concentration adjusting lance 122 and the second oxygen concentration adjusting lance 123 through pipelines, respectively; connecting a pulverized coal fluidization conveying pipeline with a solid fuel injection device 310, connecting an air supply pipeline with a gas fuel injection device 320, connecting a cooling water pipeline with a spray cooling water pipe 420, and connecting a combustion tail gas outlet 440 with tail gas component detection equipment; opening cooling devices of the high-temperature gas generation unit 100, the high-temperature gas acceleration unit 200 and the injected fuel combustion unit 300, and introducing cooling water for cooling;
s2, before ignition, opening an oxygen pipeline of the high-temperature gas generation unit 100 to supply a small amount of gas to the oxygen nozzle 116, switching on an igniter, then opening a gas pipeline to supply gas to the gas nozzle 112, and after igniting the mixed gas, closing the igniter; adjusting the injection amount of oxygen and fuel gas to stabilize the combustion state of flame in the combustion chamber 121, and opening the first oxygen concentration adjusting spray gun 122 and the second oxygen concentration adjusting spray gun 123 to adjust the concentration of the flue gas at the outlet end of the combustion chamber 121; the stable combustion of combustion flame and the adjustment of combustion tail gas temperature and oxygen concentration are realized by controlling the gas flow in the gas burner 112, the oxygen burner 116, the first oxygen concentration adjusting spray gun 122 and the second oxygen concentration adjusting spray gun 123 so as to simulate blast furnace injection hot air; the temperature of the flue gas at the outlet end of the combustion chamber 121 reaches 1000 ℃ after adjustment, and the oxygen concentration is 21%;
s3, accelerating the high-temperature flue gas generated by the high-temperature gas generation unit 100 through the mixing chamber 210, the throat pipe 220 and the expansion chamber 230 of the high-temperature gas acceleration section 200 to obtain high-temperature high-speed oxygen-containing gas; the speed of the high-temperature high-speed oxygen-containing gas reaches 200 m/s; opening tail gas component detection equipment, calibrating the equipment by using a standard device, introducing combustion tail gas from a combustion tail gas outlet 440 for gas component detection after ensuring that the working state of the equipment is normal, adding 1L/min of high-purity nitrogen as a contrast gas after the combustion tail gas passes through a gas drying device for quantitatively calculating the flow of the combustion tail gas, and determining the flow of the dried combustion tail gas through the change of the content of the nitrogen in the mixed gas;
s4, blowing coal powder from the solid fuel blowing device 310 of the fuel blowing combustion unit 300 to the fuel combustion chamber 330, wherein the speed is 20m/S, and the flow rate is 15 g/min; natural gas is injected from the gas fuel injection device 320 into the fuel combustion chamber 330 at a speed of 30m/s and a flow rate of 10cm3/min；
S5, opening the spray cooling water pipe 18 of the exhaust gas cooling and purifying unit 400, and spray cooling the high-temperature exhaust gas generated from the fuel injection combustion unit 300; the purified tail gas enters the tail gas component detection equipment through the combustion tail gas outlet 440, and cooling water for adsorbing unburned solid particles in the high-temperature flue gas is gathered to the bottom of the spray dust removal cooling chamber 410 and is discharged through the dust removal cooling waste liquid outlet 450.
Based on the results of the constituent detection of the exhaust gas analyzer, including CO2、CO、O2、CH4And N2And calculating according to the C element balance to obtain the coal powder combustion rate result when the coal powder and the natural gas are mixed and injected.
Example 2
The present embodiment provides an experimental method for simulating combustion of blast furnace injection fuel based on an experimental apparatus for simulating combustion of blast furnace injection fuel, which is different from embodiment 1 in that in step S4, the flow rate of pulverized coal is 20g/min, and the rest is substantially the same as embodiment 1, and will not be described herein again.
Example 3
This example provides an experimental method for simulating combustion of blast furnace injection fuel based on an experimental apparatus for simulating combustion of blast furnace injection fuel, which is different from example 1 in that the natural gas flow rate is 15cm in step S43And/min, the rest is basically the same as the embodiment 1, and the description is omitted.
The flue gas of examples 1 to 3 was subjected to tail gas detection, and the results of component detection and pulverized coal combustion rate of the tail gas analyzer are shown in the following table.
TABLE EXAMPLES 1-3 Tail gas component detection results and pulverized coal combustion rate results
| CO2/％ | CO/％ | O2/％ | CH4/％ | N2/％ | Combustion rate/%) | |
| Example 1 | 8.7 | 1.1 | 11.5 | 0.2 | 78.5 | 81.6 |
| Example 2 | 7.5 | 1.2 | 14.3 | 0.1 | 76.9 | 79.1 |
| Example 3 | 6.8 | 1.3 | 16.7 | 0 | 75.2 | 76.3 |
The table shows that the pulverized coal injection amount and the natural gas injection amount have obvious influence on the pulverized coal combustion rate, the pulverized coal combustion rate is reduced along with the increase of the pulverized coal injection amount, and the main reason is that the oxygen/carbon atomic ratio is reduced after the pulverized coal injection amount is increased, so that the contact area between pulverized coal particles and oxygen is influenced, the combustion rate is further reduced, and the pulverized coal combustion rate is reduced; after the injection amount of the natural gas is increased, the contact combustion reaction between the pulverized coal and the oxygen can be reduced, the main reason is that the combustion reaction between the natural gas and the oxygen is a gas-gas combustion process, the combustion rate is far higher than that of a gas-solid combustion process between the pulverized coal and the oxygen, the natural gas combustion consumes a large amount of oxygen, the pulverized coal particle combustion process is blocked, and further the pulverized coal combustion rate is reduced.
In summary, the present invention provides an experimental method and an experimental apparatus for simulating combustion of blast furnace injection fuel, in which a high-temperature high-pressure oxygen-containing gas generated by a high-temperature gas generation unit of the apparatus is transported to a high-temperature gas acceleration unit for acceleration, the obtained high-temperature high-speed oxygen-containing gas is transported to an injection fuel combustion unit, and contacts with injected fuel solid and gas fuel for combustion, and the obtained high-temperature flue gas enters a tail gas cooling and purifying unit for cooling and purifying. Simulating the combustion process of the injected fuel in a tuyere small sleeve and a tuyere convolution area of the blast furnace by simulating the injection amount, temperature, oxygen content and hot air speed of blast furnace hot air, and cooling, purifying and detecting smoke components of the obtained high-temperature tail gas; meanwhile, the combustion rates of different solid fuels blown by the blast furnace can be measured, and the influence rule of oxygen enrichment rate, blast temperature and hydrogen-rich gas blowing on the combustion rate of the solid fuels blown by the blast furnace can be detected; and the blowing process parameters are continuously regulated and controlled according to the detection result, so that reasonable process parameters are provided for the actual blast furnace blowing, and the method has important guiding significance for the actual production of the blast furnace blowing. The invention has the advantages of safety, convenient operation, flexible adjustment, stable operation and accurate experimental result; the method can truly simulate the whole blast furnace injection process, reflect the actual combustion condition of the injected fuel in the tuyere, and is beneficial to analyzing the characteristics and the change rule of the injected fuel in the tuyere raceway by simulating the combustion process of the injected fuel in the tuyere small sleeve and the tuyere raceway, thereby having important significance for creating the optimized blast furnace smelting condition, realizing the accurate control of the production process on the combustion behavior of the tuyere raceway and effectively exerting the advantages of the blast furnace production.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. An experimental device for simulating combustion of blast furnace injection fuel is characterized by comprising a high-temperature gas generating unit (100), a high-temperature gas accelerating unit (200), an injection fuel combustion unit (300) and a tail gas cooling and purifying unit (400) which are sequentially communicated and coaxially arranged; the high-temperature gas generating unit (100) is provided with a hot air conveying unit (110) and an oxygen blowing unit (120) to realize the simulation of blast furnace blowing hot air and the oxygen content of the hot air; the high-temperature gas accelerating unit (200) realizes the simulation of the hot air speed of the blast furnace; the fuel injection combustion unit (300) is provided with a solid fuel injection device (310) and a gas fuel injection device (320) to realize the simulation of the injection process of the solid fuel and the gas fuel in the blast furnace; the tail gas cooling and purifying unit (400) cools and purifies high-temperature flue gas;
high-temperature high-pressure oxygen-containing gas generated by the high-temperature gas generation unit (100) is conveyed to the high-temperature gas acceleration unit (200) for acceleration, the obtained high-temperature high-speed oxygen-containing gas is conveyed to the fuel injection combustion unit (300) and is in contact combustion with injected fuel solid and gas fuel, and the obtained high-temperature flue gas enters the tail gas cooling and purifying unit (400) for cooling and purifying.
2. The experimental facility for simulating the combustion of the injected fuel of the blast furnace as claimed in claim 1, wherein the hot air delivery unit (110) comprises a gas delivery unit, an oxygen delivery unit and a premixing chamber (113) for mixing gas and combustion-supporting oxygen; the oxygen blowing unit (120) comprises a combustion chamber (121), a first oxygen concentration adjusting spray gun (122) and a second oxygen concentration adjusting spray gun (123) which are arranged on the side wall of the combustion chamber (121); the premixing chamber (113) is communicated with the combustion chamber (121), an ignition hole (130) is formed in the side wall of the premixing chamber (113), an ignition device is installed in the ignition hole (130), and fuel gas and combustion-supporting oxygen in the premixing chamber (113) are ignited to generate high-temperature and high-pressure flue gas; and the high-temperature high-pressure flue gas enters the combustion chamber (121) and is combined with oxygen sprayed by the first oxygen concentration adjusting spray gun (122) and the second oxygen concentration adjusting spray gun (123) to obtain high-temperature high-pressure oxygen-containing gas, so that the simulation of the temperature of hot blast of the blast furnace and the oxygen content of the hot blast is realized.
3. The experimental apparatus for simulating the combustion of injected fuel in a blast furnace as claimed in claim 1, wherein said injected fuel combustion unit (300) is further provided with a fuel combustion chamber (330) communicating with said high-temperature gas acceleration unit (200); a plurality of thermocouples (340) are arranged on the side wall of the fuel combustion chamber (330) and are used for detecting the temperature of the high-temperature high-speed oxygen-containing gas before and after combustion of injected fuel; the solid fuel injection device (310) and the gas fuel injection device (320) are arranged on the side wall of the fuel combustion chamber (330), so that solid fuel and gas fuel are quickly and uniformly conveyed into the fuel combustion chamber (330), and are in contact combustion with high-temperature high-speed oxygen-containing gas conveyed by the high-temperature gas acceleration unit (200), and the simulation of the combustion process of the injected fuel of the blast furnace is realized.
4. The experimental device for simulating the combustion of the injected fuel of the blast furnace as claimed in claim 2, wherein the high-temperature gas acceleration unit (200) is provided with a mixing chamber (210), a throat (220) and an expansion chamber (230) which are communicated in sequence; the mixing chamber (210) is connected with the combustion chamber (121) of the high-temperature gas generation unit (100), the expansion chamber (230) is communicated with the fuel injection combustion unit (300) to accelerate the high-temperature high-pressure oxygen-containing gas conveyed by the high-temperature gas generation unit (100) to obtain the high-temperature high-speed oxygen-containing gas, and the simulation of the hot blast speed of the blast furnace is realized.
5. The experimental facility for simulating the combustion of the injected fuel in the blast furnace according to claim 1, wherein the tail gas cooling and purifying unit (400) is provided with a spray dust removal cooling chamber (410) communicated with the injected fuel combustion unit (300); the upper part of the side edge of the spray dedusting cooling chamber (410) is provided with a spray cooling water pipe (420) and a spray cooling nozzle (430), the spray cooling water pipe (420) is externally connected with cooling water and is communicated with the spray cooling nozzle (430), so that the high-temperature tail gas is cooled; the top of the tail end of the spray dust-removing cooling chamber (410) is provided with a combustion tail gas outlet (440), and the bottom of the spray dust-removing cooling chamber is provided with a dust-removing cooling waste liquid outlet (450); and the dust removal cooling waste liquid outlet (450) is used for discharging waste liquid which is collected to the bottom of the spray dust removal cooling chamber (410) after absorbing unburned solid particles in high-temperature flue gas.
6. The experimental device for simulating the combustion of the blast furnace injection fuel according to claim 2, wherein the gas delivery unit comprises a gas channel (111) and a gas nozzle (112) which are communicated in sequence, and the gas nozzle (112) extends into the premixing chamber (113); the oxygen delivery unit comprises a combustion-supporting oxygen channel (114), a combustion-supporting oxygen chamber (115) and an oxygen nozzle (116) which are communicated; the combustion-supporting oxygen chamber (115) is coaxially arranged on the outer sides of the fuel gas channel (111) and the fuel gas nozzle (112), and the oxygen nozzle (116) is coaxially arranged on the outer side of the fuel gas nozzle (112) so as to improve the mixing performance of fuel gas and oxygen.
7. The experimental device for simulating the combustion of the injected fuel of the blast furnace as claimed in claim 1, wherein the high-temperature gas generating unit (100), the high-temperature gas accelerating unit (200) and the injected fuel combustion unit (300) are provided with cooling devices, and cooling water is introduced to cool high-temperature components of the equipment.
8. An experimental method for simulating the combustion of blast furnace injection fuel by using the experimental device for simulating the combustion of blast furnace injection fuel as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
s1, connecting high-pressure hydrogen to a fuel gas nozzle (112) through a pipeline, and respectively connecting high-pressure industrial pure oxygen to an oxygen nozzle (116), a first oxygen concentration adjusting spray gun (122) and a second oxygen concentration adjusting spray gun (123) through pipelines; connecting a pulverized coal fluidization conveying pipeline with a solid fuel injection device (310), connecting an air supply pipeline with a gas fuel injection device (320), connecting a cooling water pipeline with a spray cooling water pipe (420), and connecting a combustion tail gas outlet (440) with tail gas component detection equipment; opening cooling devices of the high-temperature gas generation unit (100), the high-temperature gas acceleration unit (200) and the fuel injection combustion unit (300), and introducing cooling water for cooling;
s2, opening an oxygen pipeline of the high-temperature gas generation unit (100) to supply gas to the oxygen nozzle (116), switching on an igniter, opening a gas pipeline to supply gas to the gas nozzle (112), igniting mixed gas and then closing the igniter; adjusting the injection amount of oxygen and fuel gas to stabilize the flame combustion state in the combustion chamber (121), and opening the first oxygen concentration adjusting spray gun (122) and the second oxygen concentration adjusting spray gun (123) to adjust the concentration of the flue gas at the outlet end of the combustion chamber (121); the stable combustion of combustion flame and the adjustment of combustion tail gas temperature and oxygen concentration are realized by controlling the gas flow in the gas burner (112), the oxygen burner (116), the first oxygen concentration adjusting spray gun (122) and the second oxygen concentration adjusting spray gun (123) so as to simulate blast furnace injection hot air;
s3, accelerating the high-temperature flue gas generated by the high-temperature gas generation unit (100) through a mixing chamber (210), a throat pipe (220) and an expansion chamber (230) of a high-temperature gas acceleration section (200) to obtain high-temperature high-speed oxygen-containing gas; the velocity of the high-temperature high-velocity oxygen-containing gas is greater than 50m/s, preferably greater than 200 m/s;
s4, blowing solid fuel from a solid fuel blowing device (310) of a fuel blowing combustion unit (300) to a fuel combustion chamber (330), and blowing gas fuel from a gas fuel blowing device (320) to the fuel combustion chamber (330); the solid fuel and the gas fuel which are sprayed out at high speed contact with the high-temperature high-speed oxygen-containing gas for combustion, so that the simulation of the combustion process of the injected fuel in a tuyere small sleeve and a tuyere convolution region of the blast furnace is realized;
s5, opening a spray cooling water pipe (420) of an exhaust gas cooling and purifying unit (400), and performing spray cooling on the high-temperature exhaust gas generated by the fuel-injection combustion unit (300); the purified tail gas enters the tail gas component detection equipment through the combustion tail gas outlet (440), cooling water for adsorbing unburned solid particles in high-temperature flue gas is converged to the bottom of the spray dedusting cooling chamber (410), and is discharged through a dedusting cooling waste liquid outlet (450).
9. The experimental method for simulating combustion of injected fuel in a blast furnace as claimed in claim 8, wherein in step S4, the solid fuel injection device (310) injects a solid fuel at a speedGreater than 5m/s, preferably greater than 20m/s, a flow rate greater than 5g/min, a velocity of the gaseous fuel injected in said gaseous fuel injection device (320) greater than 5m/s, preferably greater than 20m/s, a flow rate greater than 5cm3Min; the solid fuel and the gas fuel can be injected separately or simultaneously.
10. The experimental device for simulating the combustion of the injected fuel of the blast furnace as claimed in claim 8, wherein the combustion tail gas outlet (440) is connected with a gas drying device and a tail gas component detection device in sequence for detecting the components of the combustion flue gas; the dust removal cooling waste liquid outlet (450) is connected with a filtering device, unburned carbon residue particles are filtered out and then dried, and experimental samples are provided for the combustion mechanism analysis of different fuels injected into the blast furnace.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI817819B (en) * | 2022-11-09 | 2023-10-01 | 中國鋼鐵股份有限公司 | Method and computer program product for controlling hot blast stove |
| WO2023231126A1 (en) * | 2022-05-31 | 2023-12-07 | 昌黎县兴国精密机件有限公司 | Laval nozzle-based supersonic hydrogen injection system, and control method therefor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000192119A (en) * | 1998-12-25 | 2000-07-11 | Kobe Steel Ltd | Method for blowing auxiliary fuel into blast furnace |
| EP2317222A1 (en) * | 2009-10-30 | 2011-05-04 | L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method of combusting particulate solid fuel with a burner |
| CN202430239U (en) * | 2011-12-09 | 2012-09-12 | 首钢总公司 | Experimental device for stimulating burning of pulverized coal sprayed and blown by blast furnace |
| CN103571989A (en) * | 2013-10-31 | 2014-02-12 | 北京科技大学 | Ultra-high temperature pulverized coal combustion experiment device |
| CN110530929A (en) * | 2019-08-23 | 2019-12-03 | 邯郸钢铁集团有限责任公司 | Blast furnace injection rate of pulverized coal combustion detection device |
| CN112322813A (en) * | 2020-11-03 | 2021-02-05 | 马鞍山钢铁股份有限公司 | Blast furnace tuyere raceway test simulation technology and method |
-
2022
- 2022-03-31 CN CN202210333012.0A patent/CN114657294B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000192119A (en) * | 1998-12-25 | 2000-07-11 | Kobe Steel Ltd | Method for blowing auxiliary fuel into blast furnace |
| EP2317222A1 (en) * | 2009-10-30 | 2011-05-04 | L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method of combusting particulate solid fuel with a burner |
| CN202430239U (en) * | 2011-12-09 | 2012-09-12 | 首钢总公司 | Experimental device for stimulating burning of pulverized coal sprayed and blown by blast furnace |
| CN103571989A (en) * | 2013-10-31 | 2014-02-12 | 北京科技大学 | Ultra-high temperature pulverized coal combustion experiment device |
| CN110530929A (en) * | 2019-08-23 | 2019-12-03 | 邯郸钢铁集团有限责任公司 | Blast furnace injection rate of pulverized coal combustion detection device |
| CN112322813A (en) * | 2020-11-03 | 2021-02-05 | 马鞍山钢铁股份有限公司 | Blast furnace tuyere raceway test simulation technology and method |
Non-Patent Citations (1)
| Title |
|---|
| 张建良等: "新型高炉喷煤模拟燃烧实验装置设计", 《北京科技大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231126A1 (en) * | 2022-05-31 | 2023-12-07 | 昌黎县兴国精密机件有限公司 | Laval nozzle-based supersonic hydrogen injection system, and control method therefor |
| TWI817819B (en) * | 2022-11-09 | 2023-10-01 | 中國鋼鐵股份有限公司 | Method and computer program product for controlling hot blast stove |
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