Propeller blade self-air-suction type iron ore sintering zero-carbon ignition heat preservation device

Abstract

A propeller blade self-suction type iron ore sintering zero-carbon ignition heat preservation device comprises a sintering trolley, an ignition heat preservation furnace and a self-driven propeller blade device. And the ignition holding furnace is arranged above the sintering pallet at the upstream of the sintering machine. The self-driven propeller blade device comprises a lifting rotating rod, a force bearing device, electric heating blades, a lifting motor and a rotating motor. And the bearing device is arranged at the upper part of the furnace top of the ignition holding furnace. The lifting rotating rod is arranged on the force bearing device and penetrates through the force bearing device and the furnace top of the ignition heat preservation furnace. The electric heating paddle is arranged in the ignition heat preservation furnace and connected with the lower end of the lifting rotating rod. The lifting motor and the rotating motor are connected with the force bearing device, the lifting motor drives the lifting rotating rod through the force bearing device to drive the electric heating blades to move up and down, and the rotating motor drives the lifting rotating rod through the force bearing device to drive the electric heating blades to rotate. Uniform electric heating ignition of a sintering material surface is achieved through lifting and rotating of the electric heating paddles, and compared with the prior art, carbon emission is obviously reduced.

Description

Technical Field

[0001] The utility model relates to an iron ore sintering ignition and heat preservation device, in particular to a propeller blade self-aspiration type iron ore sintering zero-carbon ignition and heat preservation device, belonging to the technical field of sintering. Background Art

[0002] During the sintering process, ignition is achieved through a high-temperature flame or atmosphere, igniting the coke powder within the material mixture on the sintering machine's trolley surface. This creates a high-temperature, uniform, red-hot combustion zone. Under the negative pressure of the exhaust from the lower flue, the combustion zone slowly descends, gradually completing the sintering of the sintering mixture at each height unit. Ultimately, when the combustion zone reaches the very bottom of the material layer, the sintering of the material layer carried by the trolley is complete. At this point, the trolley has also moved to the rear of the sintering machine, where it unloads the sintered ore for the next cooling stage. Ignition is a critical and crucial step in the sintering process. Uniform ignition, the quality of the resulting combustion zone, and the longevity of the ignition furnace all determine the quality, energy consumption, and operating efficiency of the entire sintering process.

[0003] The schematic diagram of the existing iron ore sintering ignition and holding furnace is as follows: Figure 1 、 Figure 2 As shown: After the sintering machine trolley is filled with sintering mixture through the nine-roller distributor, it slowly enters the hearth of the ignition furnace. It first enters the ignition section of the ignition furnace and is baked by the high-temperature flame formed by two rows of gas ignition burners in the ignition section. The coke powder in the mixture is gradually ignited to form a red-hot combustion zone; then it enters the insulation section of the ignition furnace and is baked by the medium-temperature flame formed by a row of insulation burners in the insulation section. The purpose is to keep the high-temperature sintered ore that has just been sintered warm and avoid the formation of cold and brittle powder ore due to rapid cooling.

[0004] One end of the top of the ignition furnace gas burner is connected to the gas pipeline. The gas used is generally industrial metallurgical by-product gas, such as blast furnace gas, converter gas, coke oven gas, high-speed mixed gas, high-coke mixed gas, etc., and a small part uses natural gas; the other end is connected to the air pipeline, which introduces the air blown in by the combustion blower and mixes with the gas to form a combustion flame.

[0005] The ignition furnace is generally installed parallel to the sintering machine trolley, located about 100-200mm above the sintering machine trolley railing. It consists of three beams (front beam, middle partition beam, rear beam), two furnace roofs (ignition section furnace roof, insulation section furnace roof) and four side walls (two ignition section side walls, two insulation section side walls). The total length is generally 7-9 meters, of which the ignition section is 3-4 meters and the insulation section is 4-5 meters.

[0006] With the introduction of my country's dual carbon strategy, reducing carbon emissions in the steel industry has become a key requirement for eliminating excess steel production capacity. As a key process in the steelmaking process, sintering carries a significant responsibility for carbon reduction. Currently, sintering still uses traditional coal gas ignition, which suffers from the following three major drawbacks.

[0007] 1. High carbon emissions: Since gas is used for ignition, carbon-containing combustibles such as CO and CH4 in the gas will generate CO2 after combustion, which will be drawn into the flue and then discharged, making the carbon emission index of the sintering process remain high.

[0008] 2. Uneven ignition: Since gas ignition is used, there is an obvious columnar flame. The temperatures of the outer flame, inner flame and flame core are different, and the temperature difference between the areas with flame and those without flame is also large. Therefore, it is very easy to cause uneven ignition of the iron ore sintering material surface, and local over-melting or over-raw phenomena often occur on the material surface, resulting in increased overall sintering energy consumption and increased carbon emissions.

[0009] 3. The life of the ignition furnace lining is short: Since gas ignition is used, the positions of the local high-temperature zone and the local low-temperature zone are relatively constant. The lining that is washed by the high-temperature zone flame for a long time is prone to cracking and peeling, resulting in a short life of the entire ignition furnace lining. Utility Model Content

[0010] To address the existing issues of high carbon emissions, uneven ignition, and a short lifespan of the ignition furnace lining in the sintering ignition process using traditional gas ignition, this utility model has developed a propeller blade self-aspirated zero-carbon ignition and insulation device for iron ore sintering. In this utility model, the gas burner of the traditional ignition and insulation furnace is eliminated, and a self-propelled propeller blade device is added. This device achieves uniform electric heating ignition of the sintering material surface through the lifting and rotation of electric heating blades within the ignition and insulation furnace. No additional fossil energy such as gas is consumed during the ignition process, achieving clean, green zero-carbon ignition and significantly reducing carbon emissions compared to existing technologies. Furthermore, the electric heating ignition is more uniform, effectively extending the lifespan of the ignition furnace lining.

[0011] The self-propelled propeller blade device of the present invention also includes suction blades, which can suck air outside the ignition and insulation furnace into the furnace and heat the sucked air through the electric heating blades, thereby achieving the purpose of hot air ignition when the air enters the furnace. That is, hot air ignition is introduced on the basis of electric heating ignition of the sintering material surface by the electric heating blades, thereby further enhancing the uniformity of the ignition of the material surface.

[0012] The utility model also adds a biomass solid fuel distributor downstream of the existing sintering mixture distributor, through which the biomass solid fuel is sprayed onto the surface of the sintering mixture, thereby significantly reducing the ignition temperature of the sintering material surface.

[0013] The utility model also adds a pure oxygen blowing device, through which pure oxygen is blown into the furnace of the ignition and holding furnace. The pure oxygen is mixed with the air in the furnace to form an oxygen-rich atmosphere, thereby further reducing the temperature of the combustion zone formed by ignition of biomass solid fuel or coke powder on the sintering material surface, thereby enhancing the ignition and sintering effect.

[0014] The utility model combines electric heat ignition, oxygen-enriched ignition, and biomass surface spraying ignition methods, and does not require additional consumption of fossil energy such as coal gas for ignition. Therefore, the carbon consumption in the iron ore sintering ignition link is almost zero, realizing zero-carbon ignition production in a true sense, and greatly reducing carbon emissions compared with existing technologies.

[0015] According to the implementation scheme of the utility model, a propeller blade self-aspiration type iron ore sintering zero-carbon ignition and heat preservation device is provided.

[0016] A propeller blade self-aspiration type iron ore sintering zero-carbon ignition and heat preservation device, the device comprising a sintering trolley, an ignition and heat preservation furnace, and a self-propelled propeller blade device. The ignition and heat preservation furnace is arranged above the sintering trolley upstream of the sintering machine. The self-propelled propeller blade device is arranged on the ignition and heat preservation furnace. The self-propelled propeller blade device comprises a lifting and rotating rod, a bearing, an electric heating blade, a lifting motor, and a rotating motor. The bearing is arranged on the upper part of the furnace roof of the ignition and heat preservation furnace. The lifting and rotating rod is arranged on the bearing and passes through the bearing and the furnace roof of the ignition and heat preservation furnace. The electric heating blade is arranged in the ignition and heat preservation furnace and is connected to the lower end of the lifting and rotating rod. The lifting motor and the rotating motor are respectively connected to the bearing. The lifting motor drives the lifting and rotating rod through the bearing to drive the electric heating blade up and down, and the rotating motor drives the lifting and rotating rod through the bearing to drive the electric heating blade to rotate.

[0017] Preferably, the self-propelled propeller blade device further includes an air suction blade, which is arranged in the ignition and heat preservation furnace and connected to the lower end of the lifting and rotating rod.

[0018] In the present invention, the suction blades and the electric heating blades are respectively arranged parallel to the sintering trolley, and the suction blades and the electric heating blades are both arranged on the same horizontal plane.

[0019] In the present invention, the air suction blade and the electric heating blade each include a plurality of blades, and the plurality of blades are evenly distributed around the lifting and rotating rod.

[0020] Preferably, the multiple blades of the air suction blades and the multiple blades of the electric heating blades are arranged alternately with each other.

[0021] In the present invention, along the running direction of the sintering trolley, the device further comprises a sintering mixture distributor and a biomass solid fuel distributor which are sequentially arranged above the sintering trolley and upstream of the ignition and holding furnace.

[0022] Preferably, the sintered mixture distributor and the biomass solid fuel distributor are both nine-roller distributors.

[0023] In the present invention, the device further includes a pure oxygen injection device disposed on the ignition and holding furnace. The pure oxygen injection device includes a pure oxygen pipeline and a pure oxygen nozzle. The pure oxygen pipeline is located outside the ignition and holding furnace. One end of the pure oxygen nozzle is connected to the pure oxygen pipeline, and the other end extends into the ignition and holding furnace.

[0024] In the present invention, a plurality of pure oxygen injection devices are provided on the ignition and holding furnace, and the plurality of pure oxygen injection devices are evenly distributed along the running direction of the sintering trolley.

[0025] by Figure 4 For example, the pure oxygen injection device is preferably installed on both sides of the ignition and holding furnace (same as both sides of the sintering trolley), wherein the pure oxygen pipeline is located outside the two sides of the ignition and holding furnace, one end of the pure oxygen nozzle is connected to the pure oxygen pipeline, and the other end passes through the side wall of the ignition and holding furnace and extends into the ignition and holding furnace. When there are multiple pure oxygen injection devices, in order to ensure that the pure oxygen injected into the ignition and holding furnace by each pure oxygen injection device is evenly mixed with the air in the furnace, the multiple pure oxygen injection devices are evenly arranged along the running direction of the sintering trolley, such as Figure 3 shown.

[0026] In the present invention, a plurality of self-propelled propeller blade devices are provided on the ignition and holding furnace, and the plurality of self-propelled propeller blade devices are evenly distributed along the running direction and width direction of the sintering trolley.

[0027] by Figure 3 and Figure 4 Taking an example to illustrate, in order to make the ignition uniform, the present invention evenly arranges the multiple self-propelled propeller blade devices into 3 rows along the running direction of the sintering trolley, and at the same time, evenly arranges the multiple self-propelled propeller blade devices into 2 rows along the width direction of the sintering trolley.

[0028] To address the existing issues of high carbon emissions, uneven ignition, and short furnace lining life associated with traditional gas ignition in the sintering ignition process, the present invention improves upon existing technology and structural features to develop a propeller-blade, self-aspirated, zero-carbon ignition and insulation device for iron ore sintering. This device eliminates the gas burner in the conventional ignition and insulation furnace and replaces it with a self-propelled propeller blade device comprising a lifting and rotating rod, a bearing, an electric heating blade, a lifting motor, and a rotating motor. The bearing is mounted on the upper portion of the furnace roof of the ignition and insulation furnace. The lifting and rotating rod is connected to the bearing and enables free vertical movement and rotation via a transmission mechanism within the bearing (e.g., a gear transmission, a worm gear transmission, etc.). The electric heating blade is positioned within the ignition and insulation furnace and tightly connected to the lower end of the lifting and rotating rod. The lifting and rotating motors are each connected to the bearing, and the transmission mechanism within the bearing provides driving force for the lifting and rotating rod, respectively. Therefore, under the drive of the lifting motor, the lifting rotating rod drives the electric heating blade to complete free up and down movement, thereby freely adjusting the vertical distance between the electric heating blade and the sintering material surface on the sintering trolley, so that the ignition quality is more guaranteed; correspondingly, under the drive of the rotating motor, the lifting rotating rod drives the electric heating blade to complete free rotation, thereby freely adjusting the horizontal position of the electric heating blade above the sintering material surface, so that the ignition of the material surface is more uniform; that is, the self-propelled propeller blade device can provide a high-temperature atmosphere for the sintering material surface at a suitable distance or position for electric heating ignition according to the on-site working conditions. The utility model adopts a self-propelled propeller blade device for electric ignition, and the sintering machine does not need to consume additional fossil energy such as gas, thereby realizing clean and green zero-carbon ignition, and carbon emissions are significantly reduced compared with the existing technology; moreover, electric ignition does not have the columnar flame in traditional gas ignition, so the high temperature, medium temperature and low temperature zones in the furnace of the traditional ignition and insulation furnace no longer exist, the ignition of the material surface is more uniform, and the quality is more guaranteed; similarly, since the columnar flame disappears, the adverse working condition of the ignition and insulation furnace lining being locally eroded by high temperature flames and flue gas for a long time is avoided, so the lining life of the ignition and insulation furnace is also effectively extended.

[0029] As a preferred embodiment, the present invention further adds a suction blade on the basis of the above-mentioned self-propelled propeller blade device. The suction blade is also arranged in the ignition and heat preservation furnace and is connected to the lower end of the lifting and rotating rod. That is, under the drive of the lifting motor and the rotating motor, the lifting and rotating rod can also drive the suction blade to move up and down and rotate. The setting of the suction blade can forcibly draw air from the outside of the top of the ignition and heat preservation furnace into the furnace. In this way, the air is heated by the electric heating blade while being drawn into the furnace, and finally achieves the purpose of ignition of the air entering the furnace. Therefore, hot air ignition is introduced on the basis of the electric heating ignition of the sintering material surface by the electric heating blade, further enhancing the ignition uniformity of the sintering material surface.

[0030] In order to make the ignition of the material surface more uniform, the present invention also sets the electric heating blades and the suction blades parallel to the sintering trolley (or the sintering material surface), and sets the electric heating blades and the suction blades on the same horizontal plane. Moreover, the electric heating blades and the suction blades respectively include multiple blades. In order to facilitate the electric heating blades and the suction blades to ignite the sintering material surface without affecting the ignition uniformity, the present invention evenly distributes the multiple blades of the electric heating blades and the suction blades around the lifting and rotating rod. Furthermore, the multiple blades of the electric heating blades and the multiple blades of the suction blades are staggered with each other. The staggered arrangement mentioned here means that in the circumferential direction of rotation around the lifting and rotating rod, the blades of the electric heating blades and the blades of the suction blades are staggered with each other, as shown in FIG. Figure 7 (or Figure 8 ), that is, in the circumferential direction of rotation around the lifting and rotating rod, the multiple blades of the electric heating blades are evenly spaced, and the multiple blades of the suction blades are respectively arranged corresponding to the adjacent blade gaps of the electric heating blades. Among them, the blade shape and structural form of the electric heating blades are not limited, as long as the electric heating blades can achieve uniform ignition of the sintering material surface. Each blade of the electric heating blade is provided with a uniformly distributed resistance heating element. During operation, the electric heating blades are connected to the power supply to achieve electric ignition. For example, the blades of the electric heating blades can be strip-shaped, ring-shaped, etc., and their structural distribution can be Figure 7 or Figure 8 in the forms described above or in any other form.

[0031] This utility model also adds a biomass solid fuel distributor (e.g., a nine-roller distributor) downstream of the existing sinter mix distributor. This distributor sprays granular biomass solid fuel onto the sinter mix surface, blanketing the surface with a layer of biomass solid fuel. This significantly reduces the ignition temperature of the sinter mix. This coating significantly lowers the temperature at which the char powder on the sinter mix ignites, forming the combustion zone. For example, it can be reduced from 1150°C to 800°C or even lower (e.g., 700°C, 600°C, or 500°C).

[0032] Furthermore, the present invention eliminates the existing sintering machine's top air duct system and replaces it with a pure oxygen injection device. The pure oxygen injection device consists of a pure oxygen pipe and a pure oxygen nozzle, wherein the pure oxygen pipe is located outside the ignition and holding furnace, one end of the pure oxygen nozzle is tightly connected to the pure oxygen pipe, and the other end of the pure oxygen nozzle extends into the ignition and holding furnace. This arrangement allows pure oxygen to be blown into the ignition and holding furnace through the pure oxygen pipe and the pure oxygen nozzle. The pure oxygen mixes with the air in the furnace to form an oxygen-rich atmosphere, thereby further reducing the temperature of the combustion zone formed by igniting the biomass solid fuel or coke powder on the sintering material surface, for example, from 800°C to about 650°C, or from 700°C to about 570°C. The utility model improves the existing technology and structural form, combines electric heat ignition, oxygen-enriched ignition, and biomass surface spraying ignition methods, and develops an electric-based ignition and insulation device for iron ore sintering. During the ignition process, the sintering machine does not need to consume additional fossil energy such as coal gas, and the carbon consumption in the ignition link is almost zero, realizing clean and green zero-carbon ignition production in a true sense, and greatly reducing carbon emissions compared with existing technologies.

[0033] In the application, the width of the sintering trolley is 0.1-50m, preferably 0.2-30m, more preferably 0.3-20m, and further preferably 0.5-10m. The length of the sintering trolley is 0.1-30m, preferably 0.2-20m, more preferably 0.3-10m, and further preferably 0.5-8m.

[0034] Compared with the prior art, the present invention has the following beneficial technical effects:

[0035] 1. Low carbon emissions: Since the utility model adopts an ignition method that combines electric heat ignition, oxygen-enriched ignition and biomass surface spraying, the sintering machine does not need to consume additional fossil energy such as gas during the ignition process. That is, the carbon consumption of the iron ore sintering ignition link is almost zero, realizing clean and green zero-carbon ignition, and carbon emissions are significantly reduced compared with existing technologies.

[0036] 2. Uniform ignition: The utility model adopts a self-propelled propeller blade device to ignite the sintering material surface. The lifting and rotating rod can drive the electric heating blades and the suction blades to rise and fall or rotate freely. Among them, the electric heating blades can provide a high-temperature atmosphere for the sintering material surface at a suitable distance or position according to the on-site working conditions for electric ignition. The suction blades can draw air from the outside of the ignition and holding furnace top into the furnace. The air is heated by the electric heating blades while being drawn into the furnace, and finally the purpose of ignition is achieved when the air enters the furnace. That is, hot air ignition is introduced on the basis of electric ignition of the sintering material surface by the electric heating blades, thereby further enhancing the ignition uniformity of the sintering material surface.

[0037] Moreover, since the utility model adopts electric heat ignition, there is no columnar flame in traditional gas ignition, so the high temperature, medium temperature and low temperature zones in the furnace of the traditional ignition and holding furnace no longer exist, the ignition of the material surface is more uniform, and the quality is more guaranteed.

[0038] 3. Long service life of ignition furnace lining: Similarly, due to the disappearance of columnar flame, the ignition and holding furnace lining is avoided from being locally subjected to long-term harsh working conditions of high-temperature flame and flue gas erosion, so the service life of the ignition furnace lining is also effectively extended.

[0039] In summary, the present invention effectively solves the defects and deficiencies of the prior art without causing any other negative impacts, and has low investment and operating costs. It can be expected to have high application value in the future market. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a simplified structural diagram of an existing iron ore sintering ignition and holding furnace;

[0041] Figure 2 This is a simplified structural diagram of the existing iron ore sintering distributor and ignition holding furnace;

[0042] Figure 3 This is a structural diagram of a propeller blade self-aspiration type iron ore sintering zero-carbon ignition and heat preservation device of the utility model;

[0043] Figure 4 This is a side view of the utility model provided with a self-propelled propeller blade device and a pure oxygen injection device;

[0044] Figure 5 This is a schematic structural diagram of the self-propelled propeller blade device in the present utility model;

[0045] Figure 6 This is a top view of the electric heating blade in the present utility model;

[0046] Figure 7 This is a structural distribution diagram of the utility model with suction blades and electric heating blades;

[0047] Figure 8 This is another structural distribution diagram of the utility model with suction blades and electric heating blades.

[0048] Reference numerals:

[0049] 1: Sintering trolley; 2: Ignition and holding furnace; 3: Self-propelled propeller blade device; 301: Lifting and rotating rod; 302: Bearing device; 303: Electric heating blade; 304: Lifting motor; 305: Rotating motor; 306: Suction blade; 4: Sintering mixture distributor; 5: Biomass solid fuel distributor; 6: Pure oxygen injection device; 601: Pure oxygen pipeline; 602: Pure oxygen nozzle. DETAILED DESCRIPTION

[0050] The technical solution of the present invention is illustrated below with examples, and the scope of protection requested by the present invention includes but is not limited to the following embodiments.

[0051] According to the implementation scheme of the present utility model, a propeller blade self-aspiration type iron ore sintering zero-carbon ignition and heat preservation device is provided.

[0052] A propeller blade self-aspiration type iron ore sintering zero-carbon ignition and insulation device, which includes a sintering trolley 1, an ignition and insulation furnace 2, and a self-propelled propeller blade device 3. The ignition and insulation furnace 2 is arranged above the sintering trolley 1 upstream of the sintering machine. The self-propelled propeller blade device 3 is arranged on the ignition and insulation furnace 2. The self-propelled propeller blade device 3 includes a lifting and rotating rod 301, a force bearing device 302, an electric heating blade 303, a lifting motor 304, and a rotating motor 305. The force bearing device 302 is arranged on the upper part of the furnace top of the ignition and insulation furnace 2. The lifting and rotating rod 301 is arranged on the force bearing device 302 and passes through the force bearing device 302 and the furnace top of the ignition and insulation furnace 2. The electric heating blade 303 is arranged in the ignition and insulation furnace 2 and is connected to the lower end of the lifting and rotating rod 301. The lifting motor 304 and the rotating motor 305 are respectively connected to the force bearing device 302. The lifting motor 304 drives the lifting rotating rod 301 through the force bearing device 302 to drive the electric heating blade 303 to move up and down. The rotating motor 305 drives the lifting rotating rod 301 through the force bearing device 302 to drive the electric heating blade 303 to rotate.

[0053] Preferably, the self-propelled propeller blade device 3 further includes an air suction blade 306. The air suction blade 306 is arranged in the ignition and heat preservation furnace 2 and connected to the lower end of the lifting and rotating rod 301.

[0054] In the present invention, the suction blades 306 and the electric heating blades 303 are respectively arranged parallel to the sintering trolley 1, and the suction blades 306 and the electric heating blades 303 are both arranged on the same horizontal plane.

[0055] In the present invention, the air suction blade 306 and the electric heating blade 303 respectively include multiple blades, and the multiple blades are evenly distributed around the lifting and rotating rod 301.

[0056] Preferably, the multiple blades of the air suction blades 306 and the multiple blades of the electric heating blades 303 are arranged alternately with each other.

[0057] In the present invention, along the running direction of the sintering trolley 1, the device further includes a sintering mixture distributor 4 and a biomass solid fuel distributor 5 which are sequentially arranged above the sintering trolley 1 and upstream of the ignition and holding furnace 2.

[0058] Preferably, the sintered mixture distributor 4 and the biomass solid fuel distributor 5 are both nine-roller distributors.

[0059] In the present invention, the device further includes a pure oxygen injection device 6 disposed on the ignition and holding furnace 2. The pure oxygen injection device 6 includes a pure oxygen pipeline 601 and a pure oxygen nozzle 602. The pure oxygen pipeline 601 is located outside the ignition and holding furnace 2. One end of the pure oxygen nozzle 602 is connected to the pure oxygen pipeline 601, and the other end extends into the ignition and holding furnace 2.

[0060] In the present invention, the ignition and holding furnace 2 is provided with a plurality of pure oxygen blowing devices 6. The plurality of pure oxygen blowing devices 6 are evenly distributed along the running direction of the sintering trolley 1.

[0061] In the present invention, the ignition and holding furnace 2 is provided with a plurality of self-propelled propeller blade devices 3. The plurality of self-propelled propeller blade devices 3 are evenly distributed along the running direction and width direction of the sintering trolley 1. Example 1

[0062] like Figure 3 and Figure 5-6 As shown, a propeller blade self-aspiration type iron ore sintering zero-carbon ignition and insulation device includes a sintering trolley 1, an ignition and insulation furnace 2, and a self-propelled propeller blade device 3. The ignition and insulation furnace 2 is arranged above the sintering trolley 1 upstream of the sintering machine. The self-propelled propeller blade device 3 is arranged on the ignition and insulation furnace 2. The self-propelled propeller blade device 3 includes a lifting and rotating rod 301, a force bearing device 302, an electric heating blade 303, a lifting motor 304, and a rotating motor 305. The force bearing device 302 is arranged on the upper part of the furnace top of the ignition and insulation furnace 2. The lifting and rotating rod 301 is arranged on the force bearing device 302 and passes through the force bearing device 302 and the furnace top of the ignition and insulation furnace 2. The electric heating blade 303 is arranged in the ignition and insulation furnace 2 and is connected to the lower end of the lifting and rotating rod 301. The lifting motor 304 and the rotating motor 305 are respectively connected to the force bearing device 302. The lifting motor 304 drives the lifting rotating rod 301 through the force bearing device 302 to drive the electric heating blade 303 to move up and down. The rotating motor 305 drives the lifting rotating rod 301 through the force bearing device 302 to drive the electric heating blade 303 to rotate. Example 2

[0063] like Figure 7 As shown, the embodiment 1 is repeated, except that the self-propelled propeller blade device 3 further includes an air suction blade 306. The air suction blade 306 is arranged in the ignition and heat preservation furnace 2 and is connected to the lower end of the lifting and rotating rod 301. Example 3

[0064] Example 2 is repeated, except that the suction blades 306 and the electric heating blades 303 are respectively arranged parallel to the sintering trolley 1, and the suction blades 306 and the electric heating blades 303 are both arranged on the same horizontal plane. Example 4

[0065] Example 3 is repeated, except that the air suction blade 306 and the electric heating blade 303 each include multiple blades, and the multiple blades are evenly distributed around the lifting and rotating rod 301. Example 5

[0066] Example 4 is repeated, except that the multiple blades of the air suction blade 306 and the multiple blades of the electric heating blade 303 are arranged alternately with each other.

[0067] In this embodiment, the multiple blades included in the electric heating blades 303 are all strip-shaped structures, and each strip-shaped blade is provided with a uniformly distributed resistance heating element, such as Figure 7 shown. Example 6

[0068] Repeat Example 5, except that in this embodiment, the multiple blades included in the electric heating blade 303 are all annular in structure, and each annular blade is provided with a uniformly distributed resistance heating element, such as Figure 8 shown. Example 7

[0069] Example 5 is repeated, except that along the running direction of the sintering trolley 1, the device further includes a sintering mixture distributor 4 and a biomass solid fuel distributor 5 which are sequentially arranged above the sintering trolley 1 and upstream of the ignition and holding furnace 2. Example 8

[0070] Example 7 was repeated, except that the sintered mixture distributor 4 and the biomass solid fuel distributor 5 were both nine-roller distributors. Example 9

[0071] like Figure 4 As shown, Example 8 is repeated, except that this apparatus further includes a pure oxygen injection device 6 disposed on the ignition and holding furnace 2. The pure oxygen injection device 6 includes a pure oxygen pipeline 601 and a pure oxygen nozzle 602. The pure oxygen pipeline 601 is located outside the ignition and holding furnace 2. One end of the pure oxygen nozzle 602 is connected to the pure oxygen pipeline 601, and the other end extends into the ignition and holding furnace 2. Example 10

[0072] The embodiment 9 is repeated except that a plurality of pure oxygen blowing devices 6 are provided on the ignition and holding furnace 2. The plurality of pure oxygen blowing devices 6 are evenly distributed along the running direction of the sintering trolley 1. Example 11

[0073] Example 10 is repeated, except that a plurality of self-propelled propeller blade devices 3 are provided on the ignition and holding furnace 2. The plurality of self-propelled propeller blade devices 3 are evenly distributed along the running direction and width direction of the sintering trolley 1.

[0074] In this embodiment, the working principle of the propeller blade self-aspiration iron ore sintering zero-carbon ignition and insulation device is as follows: first, the sintering mixture is evenly distributed on the sintering trolley 1 using the sintering mixture distributor 4. After the distribution is completed, the solid fuel made of biomass is sprayed on the surface of the sintering mixture through the biomass solid fuel distributor 5, so that the surface of the sintering mixture is covered with a layer of biomass solid fuel, thereby significantly reducing the ignition temperature of the surface. Then, the self-propelled propeller blade device 3 is used to perform electric ignition sintering on the sintering surface. During the process of igniting and sintering the sintering surface, the pure oxygen blowing device 6 is simultaneously used to blow pure oxygen into the furnace of the ignition and insulation furnace 2. The pure oxygen is mixed with the air in the furnace to form an oxygen-rich atmosphere, thereby further reducing the temperature of the sintering surface to be ignited to form a combustion zone.

[0075] Moreover, during the ignition process of the self-propelled propeller blade device 3, the lifting motor 304 can also drive the lifting rotating rod 301 through the force bearing device 302 to drive the electric heating blade 303 to move up and down, thereby freely adjusting the vertical distance between the electric heating blade 303 and the sintering material surface; correspondingly, the rotating motor 305 can also drive the lifting rotating rod 301 through the force bearing device 302 to drive the electric heating blade 303 to rotate, thereby freely adjusting the horizontal position of the electric heating blade 303 above the sintering material surface, that is, the self-propelled propeller blade device 3 can provide a high-temperature atmosphere for the sintering material surface at a suitable distance or position for electric heating ignition according to the on-site working conditions, thereby improving the uniformity of the material surface ignition and enhancing the ignition and sintering effect.

[0076] In addition, the self-propelled propeller blade device 3 also includes a suction blade 306. The lifting motor 304 or the rotating motor 305 drives the lifting rotating rod 301 through the load-bearing device 302 to drive the suction blade 306 to move up and down or rotate. The suction blade 306 can draw air from the top of the ignition and insulation furnace 2 into the furnace. The air is heated by the electric heating blade 303 while being drawn into the furnace, and finally achieves the purpose of ignition of the air entering the furnace, that is, hot air ignition is introduced on the basis of the electric heating blade 303 on the sintering material surface, thereby further enhancing the ignition uniformity of the sintering material surface.

Claims

1. A propeller blade self-aspiration type iron ore sintering zero-carbon ignition and heat preservation device, the device comprising a sintering trolley (1), an ignition and heat preservation furnace (2), and a self-propelled propeller blade device (3); wherein, An ignition and heat preservation furnace (2) is arranged above a sintering trolley (1) upstream of a sintering machine; a self-propelled propeller blade device (3) is arranged on the ignition and heat preservation furnace (2); the self-propelled propeller blade device (3) comprises a lifting and rotating rod (301), a force bearing device (302), an electric heating blade (303), a lifting motor (304), and a rotating motor (305); the force bearing device (302) is arranged on the top of the ignition and heat preservation furnace (2); the lifting and rotating rod (301) is arranged on the force bearing device (302) and passes through the force bearing device (302). The electric heating blade (303) is arranged in the ignition and heat preservation furnace (2) and is connected to the lower end of the lifting and rotating rod (301); the lifting motor (304) and the rotating motor (305) are respectively connected to the force bearing device (302); the lifting motor (304) drives the lifting and rotating rod (301) through the force bearing device (302) to drive the electric heating blade (303) to move up and down; the rotating motor (305) drives the lifting and rotating rod (301) through the force bearing device (302) to drive the electric heating blade (303) to rotate.

2. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 1, characterized in that: The self-propelled propeller blade device (3) further comprises an air suction blade (306); the air suction blade (306) is arranged in the ignition and heat preservation furnace (2) and is connected to the lower end of the lifting and rotating rod (301).

3. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 2, characterized in that: The air suction blade (306) and the electric heating blade (303) are respectively arranged parallel to the sintering trolley (1), and the air suction blade (306) and the electric heating blade (303) are both arranged on the same horizontal plane.

4. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 2 or 3, characterized in that: The air suction blade (306) and the electric heating blade (303) respectively include a plurality of blades, and the plurality of blades are evenly distributed around the lifting and rotating rod (301).

5. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 4, characterized in that: The multiple blades of the air suction blade (306) and the multiple blades of the electric heating blade (303) are arranged in an interlaced manner.

6. The iron ore sintering zero-carbon ignition and heat preservation device according to any one of claims 1-3 and 5, characterized in that: Along the running direction of the sintering trolley (1), the device further comprises a sintering mixture distributor (4) and a biomass solid fuel distributor (5) which are sequentially arranged above the sintering trolley (1) and upstream of the ignition and holding furnace (2).

7. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 4, characterized in that: Along the running direction of the sintering trolley (1), the device further comprises a sintering mixture distributor (4) and a biomass solid fuel distributor (5) which are sequentially arranged above the sintering trolley (1) and upstream of the ignition and holding furnace (2).

8. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 6, characterized in that: The sintered mixture distributor (4) and the biomass solid fuel distributor (5) are both nine-roller distributors.

9. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 7, characterized in that: The sintered mixture distributor (4) and the biomass solid fuel distributor (5) are both nine-roller distributors.

10. The iron ore sintering zero-carbon ignition and heat preservation device according to any one of claims 1-3, 5, and 7-9, characterized in that: The device further comprises a pure oxygen blowing device (6) arranged on the ignition and heat-insulating furnace (2); the pure oxygen blowing device (6) comprises a pure oxygen pipeline (601) and a pure oxygen nozzle (602); wherein the pure oxygen pipeline (601) is located outside the ignition and heat-insulating furnace (2); one end of the pure oxygen nozzle (602) is connected to the pure oxygen pipeline (601), and the other end extends into the ignition and heat-insulating furnace (2).

11. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 4, characterized in that: The device further comprises a pure oxygen blowing device (6) arranged on the ignition and heat-insulating furnace (2); the pure oxygen blowing device (6) comprises a pure oxygen pipeline (601) and a pure oxygen nozzle (602); wherein the pure oxygen pipeline (601) is located outside the ignition and heat-insulating furnace (2); one end of the pure oxygen nozzle (602) is connected to the pure oxygen pipeline (601), and the other end extends into the ignition and heat-insulating furnace (2).

12. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 6, characterized in that: The device further comprises a pure oxygen blowing device (6) arranged on the ignition and heat-insulating furnace (2); the pure oxygen blowing device (6) comprises a pure oxygen pipeline (601) and a pure oxygen nozzle (602); wherein the pure oxygen pipeline (601) is located outside the ignition and heat-insulating furnace (2); one end of the pure oxygen nozzle (602) is connected to the pure oxygen pipeline (601), and the other end extends into the ignition and heat-insulating furnace (2).

13. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 10, characterized in that: A plurality of pure oxygen blowing devices (6) are provided on the ignition and heat-insulating furnace (2); the plurality of pure oxygen blowing devices (6) are evenly distributed along the running direction of the sintering trolley (1).

14. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 11, characterized in that: A plurality of pure oxygen blowing devices (6) are provided on the ignition and heat-insulating furnace (2); the plurality of pure oxygen blowing devices (6) are evenly distributed along the running direction of the sintering trolley (1).

15. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 12, characterized in that: A plurality of pure oxygen blowing devices (6) are provided on the ignition and heat-insulating furnace (2); the plurality of pure oxygen blowing devices (6) are evenly distributed along the running direction of the sintering trolley (1).

16. The iron ore sintering zero-carbon ignition and heat preservation device according to any one of claims 1-3, 5, 7-9, and 11-15, characterized in that: A plurality of self-propelled propeller blade devices (3) are provided on the ignition and heat-insulating furnace (2); the plurality of self-propelled propeller blade devices (3) are evenly distributed along the running direction and width direction of the sintering trolley (1).

17. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 4, characterized in that: A plurality of self-propelled propeller blade devices (3) are provided on the ignition and heat-insulating furnace (2); the plurality of self-propelled propeller blade devices (3) are evenly distributed along the running direction and width direction of the sintering trolley (1).

18. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 6, characterized in that: A plurality of self-propelled propeller blade devices (3) are provided on the ignition and heat-insulating furnace (2); the plurality of self-propelled propeller blade devices (3) are evenly distributed along the running direction and width direction of the sintering trolley (1).

19. The iron ore sintering zero-carbon ignition and heat preservation device according to claim 10, characterized in that: A plurality of self-propelled propeller blade devices (3) are provided on the ignition and heat-insulating furnace (2); the plurality of self-propelled propeller blade devices (3) are evenly distributed along the running direction and width direction of the sintering trolley (1).

Images