Large pendulum bob type iron ore sintering zero-carbon ignition heat preservation device
By combining a large pendulum-type electric heating device with biomass solid fuel and pure oxygen injection to replace traditional gas ignition, the problems of high carbon emissions, uneven ignition and short furnace lining life in the iron ore sintering ignition process are solved, achieving the effect of zero-carbon ignition and extended furnace lining life.
Patent Information
- Application Number
- CN202422425302.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The existing iron ore sintering ignition process has problems such as high carbon emissions, uneven ignition and short life of the ignition furnace lining.
A large pendulum-type electric heating device is used for electric ignition, combined with biomass solid fuel distribution and pure oxygen injection to replace traditional gas ignition, forming an ignition method that combines electric ignition, oxygen-enriched ignition and biomass surface injection to achieve zero-carbon ignition.
It achieves clean, green, zero-carbon ignition, makes ignition more uniform, extends the life of the ignition furnace lining, and significantly reduces carbon emissions and energy consumption.
Smart Images
Figure CN223400157U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an iron ore sintering ignition and heat preservation device, in particular to a large pendulum 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] In response to the problems of high carbon emissions, uneven ignition, and short life of the ignition furnace lining in the sintering ignition process using traditional gas ignition in the existing technology, the present invention has developed a large pendulum-type iron ore sintering zero-carbon ignition and insulation device. In the solution of the present invention, the gas burner of the traditional ignition and insulation furnace is eliminated, and a large pendulum-type electric heating device is added. The device drives the electric heating plate to swing around the swing axis above the sintering trolley through the rotation of the swing ring, and at the same time drives the electric heating plate to rotate around the rotation axis above the sintering trolley through the rotation of the self-rotating body, thereby achieving uniform electric heating ignition of the sintering material surface. No additional fossil energy such as gas is required during the ignition process, thus achieving clean and green zero-carbon ignition, and significantly reducing carbon emissions compared to existing technologies. Moreover, the electric heating ignition is more uniform, and the life of the ignition furnace lining is also effectively extended.
[0011] 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.
[0012] 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.
[0013] 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.
[0014] According to the implementation scheme of the present utility model, a large pendulum type iron ore sintering zero-carbon ignition and heat preservation device is provided.
[0015] A large pendulum-type zero-carbon ignition and insulation device for iron ore sintering comprises a sintering trolley, an ignition and insulation furnace, and a large pendulum-type electric heating device. The ignition and insulation furnace is disposed above the sintering trolley upstream of the sintering machine. The large pendulum-type electric heating device comprises a swing shaft, a swing ring, a swing arm, a rotation shaft, a rotating body, and an electric heating plate. The swing shaft is disposed on the roof of the ignition and insulation furnace. The swing ring is coaxially mounted with the swing shaft. The upper end of the swing arm is connected to the swing ring, and the lower end is connected to the rotation shaft. The rotation shaft is disposed parallel to the swing shaft, and the rotating body is coaxially mounted with the rotation shaft. The electric heating plate is disposed on the rotating body. The swing ring drives the swing arm to swing back and forth around the swing shaft in a vertical plane above the sintering trolley. The electric heating plate rotates around the rotation shaft along with the rotating body.
[0016] In the present invention, the upper end of the swing arm is connected to the side of one end of the swing ring, and the lower end of the swing arm is connected to one end of the rotation shaft. Preferably, another swing arm is provided between the side of the other end of the swing ring and the other end of the rotation shaft, and the rotation body is located between the two swing arms.
[0017] In the present invention, the large pendulum type electric heating device further comprises a swing motor (not shown in the drawings). The swing motor is connected to the swing ring and drives the swing ring to swing.
[0018] In the present invention, the large pendulum type electric heating device further comprises a self-rotating motor (not shown in the drawings). The self-rotating motor is connected to the self-rotating body and drives the self-rotating body to rotate.
[0019] Preferably, the upper end of the swing arm is connected to the midpoint of the swing ring in the length direction, and the lower end of the swing arm is connected to the midpoint of the rotation axis in the length direction.
[0020] In the present invention, the ignition and holding furnace is divided into an ignition section and a holding section along the running direction of the sintering trolley. Both the ignition section and the holding section are provided with a large pendulum type electric heating device.
[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] Preferably, the pure oxygen injection device is disposed on the side of the ignition and holding furnace. The pure oxygen pipeline is disposed outside the side wall of the ignition and holding furnace. One end of the pure oxygen nozzle is connected to the pure oxygen pipeline, and the other end extends through the side wall of the ignition and holding furnace into the ignition and holding furnace.
[0025] In the present invention, a plurality of pure oxygen blowing devices are respectively provided on both sides of the ignition and holding furnace, and the plurality of pure oxygen blowing devices are evenly distributed along the running direction of the sintering trolley.
[0026] 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 design to develop a large pendulum-type 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 large pendulum-type electric heating device. The device comprises a swing shaft, a swing ring, a swing arm, a rotating shaft, a rotating body, and an electric heater. The swing shaft is fixedly mounted to the roof of the ignition and insulation furnace. The swing ring is coaxially mounted around the shaft and can rotate about it. The upper end of the swing arm is connected to the swing ring, and the lower end is connected to the rotating shaft. The rotating shaft is parallel to the swing shaft, and a rotating body is coaxially mounted around the shaft and can rotate about it. The electric heater is mounted on the rotating body (during operation, the heater is powered to achieve electric ignition). Thus, a large pendulum-style electric heating device is formed, in which the swing ring drives the swing arm to perform reciprocating swinging motion around the swing axis in the vertical plane above the sintering trolley. During the swinging process, the heating plate located on the rotating body provides a high-temperature atmosphere for the sintering material surface for electric heating ignition; at the same time, the heating plate can also rotate around the rotating axis with the rotating body, so that the ignition conditions at various positions on the sintering material surface can be adjusted as needed by adjusting the position of the heating plate, that is, the swing ring and the rotating body respectively drive the heating plate to swing or rotate, and the two cooperate with each other to effectively improve the ignition uniformity of the sintering material surface. The utility model adopts a large pendulum-type electric heating device for electric ignition. The sintering machine does not need to consume additional fossil energy such as gas, 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.
[0027] In the present invention, the upper end of the swing arm is connected to the side of one end of the swing ring, and the lower end of the swing arm is connected to one end of the rotation shaft. In order to improve the balance and stability of the large pendulum type electric heating device, the present invention further provides another swing arm between the side of the other end of the swing ring and the other end of the rotation shaft. In this case, the rotation body is provided between the two swing arms. Figure 4 shown.
[0028] Preferably, the present invention also incorporates 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).
[0029] Further preferably, the present invention eliminates the existing top air duct system of the sintering machine and replaces it with a pure oxygen injection device arranged on the side of the ignition and holding furnace. 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 (for example, outside the side wall), one end of the pure oxygen nozzle is closely connected to the pure oxygen pipe, and the other end of the pure oxygen nozzle passes through the side wall of the ignition and holding furnace and extends into the ignition and holding furnace. In this way, pure oxygen can be blown into the furnace of the ignition and holding furnace through the pure oxygen pipe and the pure oxygen nozzle. After the pure oxygen mixes with the air in the furnace, an oxygen-rich atmosphere is formed, thereby further reducing the temperature of the biomass solid fuel or coke powder on the sintering material surface to form a combustion zone when it is ignited, 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.
[0030] It should be noted that the specific structure of the swing shaft (or rotating shaft) and the swing ring (or rotating body) in this application is not limited. It suffices to ensure that the swing shaft is fixed and the swing ring rotates around the swing shaft. For example, the swing shaft and the swing ring can be connected in the simplest form of a shaft and a collar, or in the form of a shaft and a bearing, in which the shaft and the inner ring of the bearing are fixed, while the outer ring of the bearing rotates.
[0031] Compared with the prior art, the present invention has the following beneficial technical effects:
[0032] 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.
[0033] 2. Uniform ignition: The utility model adopts a large pendulum-type electric heating device to ignite the sintering material surface, wherein the swing ring drives the swing arm to perform reciprocating swinging motion around the swing axis in the vertical plane above the sintering trolley. During the swinging process, the electric heating plate located on the rotating body provides a high-temperature atmosphere for the sintering material surface for electric heating ignition; at the same time, the electric heating plate can also rotate around the rotating axis with the rotating body, so that the ignition conditions at various positions on the sintering material surface can be adjusted as needed by adjusting the position of the electric heating plate, that is, the swing ring and the rotating body respectively drive the electric heating plate to swing or rotate, and the two cooperate with each other to effectively improve the ignition uniformity of the sintering material surface.
[0034] 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.
[0035] 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.
[0036] 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
[0037] Figure 1 This is a simplified structural diagram of an existing iron ore sintering ignition and holding furnace;
[0038] Figure 2 This is a simplified structural diagram of the existing iron ore sintering distributor and ignition holding furnace;
[0039] Figure 3 This is a structural diagram of a large pendulum type zero-carbon ignition and heat preservation device for iron ore sintering in the present utility model;
[0040] Figure 4 This is a side view of the utility model equipped with a large pendulum type electric heating device and a pure oxygen blowing device;
[0041] Figure 5 It is a schematic diagram of the reciprocating swing of the large pendulum type electric heating device in the utility model;
[0042] Figure 6 It is a partial schematic diagram of the large pendulum type electric heating device in the utility model.
[0043] Reference numerals:
[0044] 1: Sintering trolley; 2: Ignition and holding furnace; 201: Ignition section; 202: Holding section; 3: Large pendulum electric heating device; 301: Swinging shaft; 302: Swinging ring; 303: Swinging arm; 304: Rotating shaft; 305: Rotating body; 306: Electric heating plate; 4: Sintering mixture distributor; 5: Biomass solid fuel distributor; 6: Pure oxygen injection device; 601: Pure oxygen pipeline; 602: Pure oxygen nozzle. DETAILED DESCRIPTION
[0045] The technical solution of the present invention is described below with examples, and the scope of protection requested by the present invention includes but is not limited to the following embodiments.
[0046] According to the implementation scheme of the present utility model, a large pendulum type iron ore sintering zero-carbon ignition and heat preservation device is provided.
[0047] A large pendulum-type zero-carbon ignition and insulation device for iron ore sintering comprises a sintering trolley 1, an ignition and insulation furnace 2, and a large pendulum-type electric heating device 3. The ignition and insulation furnace 2 is disposed above the sintering trolley 1 upstream of the sintering machine. The large pendulum-type electric heating device 3 comprises a swing shaft 301, a swing ring 302, a swing arm 303, a rotation shaft 304, a rotating body 305, and an electric heating plate 306. The swing shaft 301 is disposed on the top of the ignition and insulation furnace 2. The swing ring 302 is coaxially mounted with the swing shaft 301. The upper end of the swing arm 303 is connected to the swing ring 302, and the lower end is connected to the rotation shaft 304. The rotation shaft 304 is disposed parallel to the swing shaft 301, and the rotating body 305 is coaxially mounted with the rotation shaft 304. The electric heating plate 306 is disposed on the rotating body 305. The swing ring 302 drives the swing arm 303 to swing back and forth around the swing axis 301 in the vertical plane above the sintering trolley 1. The electric heater 306 rotates around the rotation axis 304 along with the rotating body 305.
[0048] In the present invention, the upper end of the swing arm 303 is connected to the side of one end of the swing ring 302, and the lower end of the swing arm 303 is connected to one end of the rotation shaft 304. Preferably, another swing arm 303 is provided between the side of the other end of the swing ring 302 and the other end of the rotation shaft 304, and the rotation body 305 is located between the two swing arms 303.
[0049] In the present invention, the large pendulum type electric heating device 3 further comprises a swing motor. The swing motor is connected to the swing ring 302 and drives the swing ring 302 to swing.
[0050] In the present invention, the large pendulum type electric heating device 3 further comprises a self-rotating motor which is connected to the self-rotating body 305 and drives the self-rotating body 305 to rotate.
[0051] Preferably, the upper end of the swing arm 303 is connected to the midpoint of the swing ring 302 in the length direction, and the lower end of the swing arm 303 is connected to the midpoint of the rotation shaft 301 in the length direction.
[0052] In the present invention, along the running direction of the sintering trolley 1, the ignition and holding furnace 2 is divided into an ignition section 201 and a holding section 202. Both the ignition section 201 and the holding section 202 are provided with a large pendulum type electric heating device 3.
[0053] 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.
[0054] Preferably, the sintered mixture distributor 4 and the biomass solid fuel distributor 5 are both nine-roller distributors.
[0055] 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.
[0056] Preferably, the pure oxygen injection device 6 is disposed to the side of the ignition and holding furnace 2. A pure oxygen pipeline 601 is disposed outside the side wall of the ignition and holding furnace 2. One end of a pure oxygen nozzle 602 is connected to the pure oxygen pipeline 601, and the other end extends through the side wall of the ignition and holding furnace 2 into the ignition and holding furnace 2.
[0057] In the present invention, a plurality of pure oxygen blowing devices 6 are respectively provided on both sides of 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 1
[0058] like Figure 3 and Figure 5-6As shown, a large pendulum-type zero-carbon ignition and insulation device for iron ore sintering comprises a sintering trolley 1, an ignition and insulation furnace 2, and a large pendulum-type electric heating device 3. The ignition and insulation furnace 2 is disposed above the sintering trolley 1 upstream of the sintering machine. The large pendulum-type electric heating device 3 comprises a swing shaft 301, a swing ring 302, a swing arm 303, a rotation shaft 304, a rotating body 305, and an electric heating plate 306. The swing shaft 301 is disposed on the top of the ignition and insulation furnace 2. The swing ring 302 is coaxially mounted with the swing shaft 301. The upper end of the swing arm 303 is connected to the swing ring 302, and the lower end is connected to the rotation shaft 304. The rotation shaft 304 is disposed parallel to the swing shaft 301, and the rotating body 305 is coaxially mounted with the rotation shaft 304. The electric heating plate 306 is disposed on the rotating body 305. The swing ring 302 drives the swing arm 303 to swing back and forth around the swing axis 301 in the vertical plane above the sintering trolley 1. The electric heater 306 rotates around the rotation axis 304 along with the rotating body 305. Example 2
[0059] like Figure 4 As shown, Example 1 is repeated, except that the upper end of the swing arm 303 is connected to the side of one end of the swing ring 302, and the lower end of the swing arm 303 is connected to one end of the rotation shaft 304. Another swing arm 303 is provided between the side of the other end of the swing ring 302 and the other end of the rotation shaft 304, and the rotation body 305 is located between the two swing arms 303. Example 3
[0060] The embodiment 2 is repeated, except that the large pendulum type electric heating device 3 further includes a swing motor. The swing motor is connected to the swing ring 302 and drives the swing ring 302 to swing. Example 4
[0061] The embodiment 3 is repeated, except that the large pendulum type electric heating device 3 further includes a rotation motor. The rotation motor is connected to the rotation body 305 and drives the rotation body 305 to rotate. Example 5
[0062] The fourth embodiment is repeated except that the ignition and holding furnace 2 is divided into an ignition section 201 and a holding section 202 along the running direction of the sintering trolley 1. Both the ignition section 201 and the holding section 202 are provided with a large pendulum type electric heating device 3. Example 6
[0063] 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 7
[0064] Example 6 was repeated, except that the sintered mixture distributor 4 and the biomass solid fuel distributor 5 were both nine-roller distributors. Example 8
[0065] Example 7 was repeated, except that the apparatus further included a pure oxygen injection device 6 disposed on the ignition and holding furnace 2. The pure oxygen injection device 6 comprised a pure oxygen pipeline 601 and a pure oxygen nozzle 602. The pure oxygen pipeline 601 was located outside the ignition and holding furnace 2. One end of the pure oxygen nozzle 602 was connected to the pure oxygen pipeline 601, and the other end extended into the ignition and holding furnace 2. Example 9
[0066] Example 8 was repeated, except that the pure oxygen injection device 6 was positioned to the side of the ignition and holding furnace 2. A pure oxygen pipe 601 was positioned outside the side wall of the ignition and holding furnace 2. One end of a pure oxygen nozzle 602 was connected to the pure oxygen pipe 601, and the other end passed through the side wall of the ignition and holding furnace 2 and extended into the interior of the furnace 2. Example 10
[0067] The embodiment 9 is repeated except that a plurality of pure oxygen blowing devices 6 are respectively provided on both sides of 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.
[0068] In this embodiment, the working principle of the large pendulum type 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 large pendulum type electric heating device 3 is used to perform electric ignition and 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.
[0069] Specifically, during the ignition process of the large pendulum-type electric heating device 3, the swing ring 302 drives the swing arm 303 to perform reciprocating swinging motion around the swing axis 301 in the vertical plane above the sintering trolley 1. During the swinging process, the electric heating plate 306 located on the rotating body 305 provides a high-temperature atmosphere for the sintering material surface for electric heating ignition; at the same time, the electric heating plate 306 rotates around the rotating axis 304 as the rotating body 305 rotates, so that the ignition conditions at various positions on the sintering material surface can be adjusted as needed by adjusting the position of the electric heating plate 306, that is, the swing ring 302 and the rotating body 305 respectively drive the electric heating plate 306 to swing or rotate, and the two cooperate with each other to effectively improve the ignition uniformity of the sintering material surface and enhance the ignition and sintering effect.
Claims
1. A large pendulum type iron ore sintering zero-carbon ignition and heat preservation device, characterized by: The device comprises a sintering trolley (1), an ignition and heat-insulating furnace (2), and a large pendulum-type electric heating device (3); the ignition and heat-insulating furnace (2) is arranged above the sintering trolley (1) upstream of the sintering machine; the large pendulum-type electric heating device (3) comprises a swing shaft (301), a swing ring (302), a swing arm (303), a rotation shaft (304), a rotation body (305), and an electric heating plate (306); wherein the swing shaft (301) is arranged on the top of the ignition and heat-insulating furnace (2); the swing ring (302) and the swing shaft (301) are coaxially installed; the swing The upper end of the movable arm (303) is connected to the swing ring (302), and the lower end is connected to the rotation shaft (304); the rotation shaft (304) is arranged in parallel with the swing shaft (301), and the rotating body (305) is installed coaxially with the rotation shaft (304); the electric heating plate (306) is arranged on the rotating body (305); the swing ring (302) drives the swing arm (303) to swing back and forth around the swing shaft (301) in a vertical plane above the sintering trolley (1); the electric heating plate (306) rotates around the rotation shaft (304) along with the rotating body (305).
2. The device according to claim 1, characterized in that: The upper end of the swing arm (303) is connected to the side of one end of the swing ring (302), and the lower end of the swing arm (303) is connected to one end of the rotation shaft (304).
3. The device according to claim 2, characterized in that: Another swing arm (303) is correspondingly provided between the side portion of the other end of the swing ring (302) and the other end of the rotation shaft (304), and the rotation body (305) is located between the two swing arms (303).
4. The device according to any one of claims 1 to 3, characterized in that: The large pendulum-type electric heating device (3) further comprises a swing motor; the swing motor is connected to the swing ring (302) and drives the swing ring (302) to swing.
5. The device according to any one of claims 1 to 3, characterized in that: The large pendulum-type electric heating device (3) further comprises a self-rotating motor; the self-rotating motor is connected to the self-rotating body (305) and drives the self-rotating body (305) to rotate.
6. The device according to claim 4, characterized in that: The large pendulum-type electric heating device (3) further comprises a self-rotating motor; the self-rotating motor is connected to the self-rotating body (305) and drives the self-rotating body (305) to rotate.
7. The device according to any one of claims 1 to 3 and 6, characterized in that: Along the running direction of the sintering trolley (1), the ignition and insulation furnace (2) is divided into an ignition section (201) and a insulation section (202); both the ignition section (201) and the insulation section (202) are provided with a large pendulum-type electric heating device (3).
8. The device according to claim 4, characterized in that: Along the running direction of the sintering trolley (1), the ignition and insulation furnace (2) is divided into an ignition section (201) and a insulation section (202); both the ignition section (201) and the insulation section (202) are provided with a large pendulum-type electric heating device (3).
9. The device according to claim 5, characterized in that: Along the running direction of the sintering trolley (1), the ignition and insulation furnace (2) is divided into an ignition section (201) and a insulation section (202); both the ignition section (201) and the insulation section (202) are provided with a large pendulum-type electric heating device (3).
10. The device according to any one of claims 1-3, 6, 8-9, 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).
11. The device according to claim 10, characterized in that: The sintered mixture distributor (4) and the biomass solid fuel distributor (5) are both nine-roller distributors.
12. The device according to any one of claims 1-3, 6, 8-9, and 11, 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 device according to claim 12, characterized in that: The pure oxygen blowing device (6) is arranged on the side of the ignition and heat preservation furnace (2); wherein the pure oxygen pipeline (601) is arranged outside the side wall of the ignition and heat preservation furnace (2); one end of the pure oxygen nozzle (602) is connected to the pure oxygen pipeline (601), and the other end passes through the side wall of the ignition and heat preservation furnace (2) and extends into the ignition and heat preservation furnace (2).
14. The device according to claim 13, characterized in that: A plurality of pure oxygen blowing devices (6) are respectively provided on both sides of 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).