Ferris wheel type iron ore sintering zero-carbon ignition heat preservation device

Abstract

A ferris wheel type iron ore sintering zero-carbon ignition heat preservation device comprises a sintering trolley, an ignition heat preservation furnace and a ferris wheel type electric heating device. And the ignition holding furnace is arranged above the sintering pallet. The sky wheel type electric heating device comprises a revolution shaft, a revolution ring, a rotation arm, a rotation shaft, a rotation body and an electric heating piece. The revolution shaft is arranged on the furnace top of the ignition holding furnace. And the revolution ring and the revolution shaft are coaxially mounted. The revolution ring is connected with a plurality of rotating arms, and the rotating arms are evenly distributed in the circumferential direction of the revolution ring. And the other end of each rotating arm is connected with a self-rotating shaft. The rotation shafts and the revolution shaft are arranged in parallel, and each rotation shaft is coaxially provided with a rotation body. And each autorotation body is provided with an electric heating sheet. And the revolution ring drives the rotating arm to rotate around the revolution shaft above the sintering pallet. The electric heating piece rotates around the rotation shaft along with the rotation body. According to the ferris wheel type electric heating device, uniform electric heating ignition of a sintering material surface is achieved, 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 Ferris wheel 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 Ferris wheel-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 Ferris wheel-type electric heating device is added. The device drives the electric heating plate to revolve around the revolution axis above the sintering trolley through the rotation of the revolving 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 rotating body, thereby achieving uniform electric heating ignition of the sintering material surface. No additional fossil energy such as gas is consumed 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 an embodiment of the present utility model, a Ferris wheel type iron ore sintering zero-carbon ignition and heat preservation device is provided.

[0015] A Ferris wheel-style zero-carbon ignition and heat preservation device for iron ore sintering comprises a sintering trolley, an ignition and heat preservation furnace, and a Ferris wheel-style electric heating device. The ignition and heat preservation furnace is positioned above the sintering trolley upstream of the sintering machine. The Ferris wheel-style electric heating device comprises a revolving shaft, a revolving ring, a rotating arm, a rotating shaft, a rotating body, and electric heating plates. The revolving shaft is positioned on the roof of the ignition and heat preservation furnace. The revolving ring is coaxially mounted with the revolving shaft. Connected to the revolving ring are several rotating arms, evenly distributed along the circumference of the revolving ring. Each rotating arm is connected to a rotating shaft at one end facing away from the revolving ring. Each rotating shaft is arranged parallel to the revolving shaft, and a rotating body is coaxially mounted on each rotating shaft. Each rotating body is provided with an electric heating plate. The revolving ring drives the rotating arm to rotate about the revolving shaft in a vertical plane above the sintering trolley. The electric heating plate rotates along with the rotating body about the rotating shaft.

[0016] In the present invention, the plurality of rotating arms connected to the orbiting ring constitutes a set of rotating arms, wherein one end of each rotating arm is connected to a side portion of one end of the orbiting ring, and the other end is connected to one end of the rotation shaft. Preferably, another set of rotating arms is provided between the side portion of the other end of the orbiting ring and the other end of each rotation shaft, and each swivel is provided between the two sets of rotating arms.

[0017] Preferably, the Ferris wheel type electric heating device further comprises a ring-shaped power supply device, which is arranged on the rotating arm and connected to the electric heating plate.

[0018] In the present invention, the device further includes a sintering mixture distributor and a biomass solid fuel distributor disposed above the sintering trolley. Along the direction of travel of the sintering trolley, the sintering mixture distributor and the biomass solid fuel distributor are disposed upstream of the ignition and holding furnace, with the sintering mixture distributor being located upstream of the biomass solid fuel distributor.

[0019] Preferably, the sintered mixture distributor and the biomass solid fuel distributor are both nine-roller distributors.

[0020] In the present invention, the device further includes a pure oxygen injection device positioned to the side of 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 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.

[0021] In the present invention, a plurality of pure oxygen blowing devices are 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.

[0022] In the present invention, the Ferris wheel-type electric heating device further includes a revolution motor (not shown in the drawings) and a rotation motor (not shown in the drawings). The revolution motor is connected to the revolution ring and drives the revolution ring to rotate. The rotation motor is connected to the rotation body and drives the rotation body to rotate.

[0023] Preferably, each rotating body is provided with a plurality of electric heating plates, which are evenly distributed along the length direction and / or circumference direction of the corresponding rotating body.

[0024] 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 Ferris wheel type electric heating device.

[0025] In the present invention, a group of rotating arms of the Ferris wheel type electric heating device includes 2-20 rotating arms, preferably 4-12 rotating arms.

[0026] In response to the problems of high carbon emissions, uneven ignition, and short life of the ignition furnace lining in the sintering ignition link using traditional gas ignition in the existing technology, the utility model has developed a Ferris wheel type iron ore sintering zero-carbon ignition and insulation device by improving the existing technology and structural form. The utility model eliminates the gas burner of the traditional ignition and insulation furnace and replaces it with a Ferris wheel type electric heating device, which includes a revolution shaft, a revolution ring, a rotating arm, a rotation shaft, a rotating body, and an electric heating plate. Among them, the revolution shaft is fixedly mounted on the top of the ignition and insulation furnace, and the revolution ring is arranged on the periphery of the revolution shaft and is coaxially installed with the revolution shaft, and the revolution ring can rotate around the revolution shaft. A number of rotating arms are connected to the revolution ring, and the number of rotating arms are evenly arranged along the circumferential direction of the revolution ring, and the other end of each rotating arm (i.e., the end away from the revolution ring) is connected to the rotation shaft. Each rotating shaft is arranged parallel to the orbital axis, and a rotating body is coaxially mounted on the outer periphery of each rotating shaft, each rotating body being capable of rotating about its corresponding axis. Heaters are mounted on the rotating bodies, and each rotating body is provided with a heater. This creates a Ferris wheel-like electric heating device, in which the orbiting ring drives the rotating arm to rotate about the orbital axis in a vertical plane above the sintering trolley. During this rotation, the heaters on each rotating body provide a high-temperature atmosphere for the sintering material surface for electric ignition. Simultaneously, the heaters on each rotating body can also rotate with the rotating body about its axis, allowing the ignition conditions at various locations on the sintering material surface to be adjusted as needed by adjusting the heater position. The orbiting ring and rotating body respectively drive the heaters to orbit or rotate, and the two work together to effectively improve the ignition uniformity of the sintering material surface. The utility model adopts a Ferris wheel type electric heating device for electric ignition. The sintering machine does not need to consume additional fossil energy such as gas, thus 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] The present invention sets the several rotating arms connected to the above-mentioned revolving ring as a group of rotating arms. In this group of rotating arms, one end of each rotating arm is connected to the side of one end of the revolving ring, and the other end is connected to one end of the rotation shaft. In order to improve the balance and stability of the Ferris wheel type electric heating device, the present invention also sets another group of rotating arms correspondingly between the side of the other end of the revolving ring and the other end of each rotating shaft. At this time, each rotating body is correspondingly set between the two groups of rotating arms, that is, the rotating body coaxially installed on each rotation shaft is set between the corresponding two rotating arms. A group of rotating arms of the Ferris wheel type electric heating device includes multiple rotating arms, preferably including 2-20 rotating arms, and further preferably including 4-12 rotating arms. For example, a group of rotating arms includes 2, 3, 4, 6, 7, 8 or 12 rotating arms, etc.

[0028] Considering that the Ferris wheel-type electric heating device is constantly rotating during operation, and the rotating electric heater requires a power source for electric ignition, the present invention incorporates a ring-shaped power supply device into the Ferris wheel-type electric heating device to prevent the connection wires between the electric heater and the power source from becoming tangled due to rotation, thereby affecting electric ignition. This ring-shaped power supply device is mounted on a rotating arm and rotates with the rotating arm. During operation, the electric heater is connected to the power source via the ring-shaped power supply device, thereby ensuring stable and safe electric ignition.

[0029] In order to further enhance the ignition uniformity of the sintering material surface, the present invention can also set multiple electric heating plates on each rotating body, and the multiple electric heating plates are evenly distributed on the corresponding rotating body (including being evenly distributed in the longitudinal direction of the rotating body and / or evenly distributed along the circumferential direction of the rotating body). The specific arrangement of the electric heating plates on the rotating body is not limited, as long as the electric heating plates can achieve uniform ignition of the sintering material surface. For example, the arrangement of the electric heating plates on the rotating body can be Figure 7 、 Figure 8 、 Figure 9 or Figure 10 in the forms described above or in any other form.

[0030] Preferably, the present invention further incorporates a biomass solid fuel distributor (e.g., a nine-roller distributor) downstream of the existing sintering mixture distributor. This distributor sprays granular solid fuel made from biomass onto the surface of the sintering mixture, covering the sintering surface with a layer of biomass solid fuel. This significantly reduces the ignition temperature of the sintering surface. The biomass solid fuel coating significantly reduces the temperature at which the char on the sintering surface is ignited to form a combustion zone, for example, from 1150°C to 800°C or even lower (e.g., 700°C, 600°C, or 500°C).

[0031] Further preferably, the present invention cancels the original sintering machine's top air duct system and replaces it with a pure oxygen blowing device arranged on the side of the ignition and insulation furnace. The pure oxygen blowing device consists of a pure oxygen pipe and a pure oxygen nozzle, wherein the pure oxygen pipe is located outside the ignition and insulation furnace (for example, outside the side wall), one end of the pure oxygen nozzle is tightly connected to the pure oxygen pipe, and the other end of the pure oxygen nozzle passes through the side wall of the ignition and insulation furnace and extends into the ignition and insulation furnace. In this way, pure oxygen can be blown into the ignition and insulation furnace through the pure oxygen pipe and the pure oxygen nozzle. After the pure oxygen is mixed 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 by ignition, for example, it can be reduced from 800°C to about 650°C, or from 700°C to about 570°C, etc. 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.

[0032] It should be noted that the specific structure of the orbiting shaft (or rotating shaft) and the orbiting ring (or rotating body) in this application is not limited. It can be that the orbiting shaft is fixed and the orbiting ring rotates around the orbiting shaft. For example, the orbiting shaft and the orbiting ring can be connected in the simplest form of a shaft and a collar, or in the form of a shaft and a bearing structure, in which the shaft and the inner ring of the bearing are fixed, and the outer ring of the bearing rotates.

[0033] Compared with the prior art, the present invention has the following beneficial technical effects:

[0034] 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.

[0035] 2. Uniform ignition: The utility model adopts a Ferris wheel type electric heating device to ignite the sintering material surface, wherein the revolving ring drives the rotating arm to rotate around the revolving axis in the vertical plane above the sintering trolley. During the rotation process, the electric heating plates located on each rotating body respectively provide a high-temperature atmosphere for the sintering material surface for electric ignition; at the same time, the electric heating plate on each rotating body 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 revolving ring and the rotating body respectively drive the electric heating plate to revolve or rotate, and the two cooperate with each other to effectively improve the ignition uniformity of the sintering material surface.

[0036] 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.

[0037] 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.

[0038] In summary, the present invention effectively solves the defects and shortcomings of the existing technology without causing 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

[0039] Figure 1 This is a simplified structural diagram of an existing iron ore sintering ignition and holding furnace;

[0040] Figure 2 This is a simplified structural diagram of the existing iron ore sintering distributor and ignition holding furnace;

[0041] Figure 3 This is a structural schematic diagram of a Ferris wheel type iron ore sintering zero-carbon ignition and heat preservation device of the utility model;

[0042] Figure 4 This is a schematic structural diagram of the Ferris wheel type electric heating device in the present utility model;

[0043] Figure 5 This is a schematic diagram of the structure of the pure oxygen blowing device provided in the present utility model;

[0044] Figure 6 This is a side view of the utility model equipped with a Ferris wheel type electric heating device and a pure oxygen blowing device;

[0045] Figure 7 This is a first structural distribution diagram of the electric heating plate on the rotating body in the Ferris wheel type electric heating device of the utility model;

[0046] Figure 8 This is a second structural distribution diagram of the electric heating plate on the rotating body in the Ferris wheel type electric heating device of the utility model;

[0047] Figure 9 This is a third structural distribution diagram of the electric heating plate on the rotating body in the Ferris wheel type electric heating device of the present utility model;

[0048] Figure 10 This is a fourth structural distribution diagram of the electric heating plates on the rotating body in the Ferris wheel type electric heating device of the present invention.

[0049] Reference numerals:

[0050] 1: Sintering trolley; 2: Ignition and holding furnace; 201: Ignition section; 202: Holding section; 3: Ferris wheel-type electric heating device; 301: Revolution axis; 302: Revolution ring; 303: Rotating arm; 304: Rotation axis; 305: Rotating body; 306: Electric heating plate; 307: Ring power supply device; 4: Sintering mixture distributor; 5: Biomass solid fuel distributor; 6: Pure oxygen injection device; 601: Pure oxygen pipeline; 602: Pure oxygen nozzle. DETAILED DESCRIPTION

[0051] 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.

[0052] According to an embodiment of the present utility model, a Ferris wheel type iron ore sintering zero-carbon ignition and heat preservation device is provided.

[0053] A Ferris wheel type zero-carbon ignition and heat preservation device for iron ore sintering, comprising a sintering trolley 1, an ignition and heat preservation furnace 2, and a Ferris wheel type electric heating device 3. The ignition and heat preservation furnace 2 is arranged above the sintering trolley 1 upstream of the sintering machine. The Ferris wheel type electric heating device 3 comprises a revolution shaft 301, a revolution ring 302, a rotating arm 303, a rotation shaft 304, a rotating body 305, and an electric heating plate 306. The revolution shaft 301 is arranged on the top of the ignition and heat preservation furnace 2. The revolution ring 302 is coaxially mounted with the revolution shaft 301. A plurality of rotating arms 303 are connected to the revolution ring 302, and the plurality of rotating arms 303 are evenly distributed along the circumferential direction of the revolution ring 302. Each rotating arm 303 is connected to a rotation shaft 304 at the end facing away from the revolution ring 302. Each rotating shaft 304 is arranged parallel to the revolution axis 301, and a rotating body 305 is coaxially mounted on each rotating shaft 304. Each rotating body 305 is equipped with a heating plate 306. The revolution ring 302 drives the rotating arm 303 to rotate about the revolution axis 301 in a vertical plane above the sintering trolley 1. The heating plate 306 rotates along with the rotating body 305 about the rotation axis 304.

[0054] In the present invention, the multiple rotating arms 303 connected to the orbiting ring 302 constitute a set of rotating arms 303. One end of each rotating arm 303 is connected to the side of one end of the orbiting ring 302, and the other end is connected to one end of the rotation shaft 304. Preferably, another set of rotating arms 303 is provided between the side of the other end of the orbiting ring 302 and the other end of each rotation shaft 304, with each swivel 305 provided between the two sets of rotating arms 303.

[0055] Preferably, the Ferris wheel type electric heating device 3 further includes a ring-shaped power supply device 307 . The ring-shaped power supply device 307 is disposed on the rotating arm 303 and connected to the electric heating plate 306 .

[0056] In the present invention, the device further includes a sintering mixture distributor 4 and a biomass solid fuel distributor 5 provided above the sintering trolley 1. Along the running direction of the sintering trolley 1, the sintering mixture distributor 4 and the biomass solid fuel distributor 5 are provided upstream of the ignition and holding furnace 2, and the sintering mixture distributor 4 is located upstream of the biomass solid fuel distributor 5.

[0057] Preferably, the sintered mixture distributor 4 and the biomass solid fuel distributor 5 are both nine-roller distributors.

[0058] In the present invention, the device further includes a pure oxygen injection device 6 disposed to the side of the ignition and holding furnace 2. The pure oxygen injection device 6 comprises a pure oxygen pipeline 601 and a pure oxygen nozzle 602. The pure oxygen pipeline 601 is located outside the side wall of 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 through the side wall of the ignition and holding furnace 2 into the ignition and holding furnace 2.

[0059] In the present invention, a plurality of pure oxygen blowing devices 6 are 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.

[0060] In the present invention, the Ferris wheel type electric heating device 3 further comprises a revolution motor and a rotation motor. The revolution motor is connected to the revolution ring 302 and drives the revolution ring 302 to rotate. The rotation motor is connected to the rotation body 305 and drives the rotation body 305 to rotate.

[0061] Preferably, each rotating body 305 is provided with a plurality of electric heating plates 306. The plurality of electric heating plates 306 are evenly distributed on the corresponding rotating body 305 along the length direction and / or the circumference direction of the rotating body 305.

[0062] 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 Ferris wheel type electric heating device 3.

[0063] In the present invention, a group of rotating arms 303 of the Ferris wheel type electric heating device 3 includes 2-20 rotating arms 303 , preferably 4-12 rotating arms 303 .

[0064] Example 1

[0065] like Figure 3-4As shown, a Ferris wheel type zero-carbon ignition and heat preservation device for iron ore sintering comprises a sintering trolley 1, an ignition and heat preservation furnace 2, and a Ferris wheel type electric heating device 3. The ignition and heat preservation furnace 2 is arranged above the sintering trolley 1 upstream of the sintering machine. The Ferris wheel type electric heating device 3 comprises a revolution shaft 301, a revolution ring 302, a rotating arm 303, a rotation shaft 304, a rotating body 305, and an electric heating plate 306. The revolution shaft 301 is arranged on the top of the ignition and heat preservation furnace 2. The revolution ring 302 is coaxially mounted with the revolution shaft 301. A plurality of rotating arms 303 are connected to the revolution ring 302, and the plurality of rotating arms 303 are evenly distributed along the circumferential direction of the revolution ring 302. Each rotating arm 303 is connected to a rotation shaft 304 at the end facing away from the revolution ring 302. Each rotating shaft 304 is arranged parallel to the revolution axis 301, and a rotating body 305 is coaxially mounted on each rotating shaft 304. Each rotating body 305 is equipped with a heating plate 306. The revolution ring 302 drives the rotating arm 303 to rotate about the revolution axis 301 in a vertical plane above the sintering trolley 1. The heating plate 306 rotates along with the rotating body 305 about the rotation axis 304.

[0066] Example 2

[0067] Example 1 is repeated, except that the plurality of rotating arms 303 connected to the orbiting ring 302 constitute a set of rotating arms 303. One end of each rotating arm 303 is connected to the side of one end of the orbiting ring 302, and the other end is connected to one end of the rotation shaft 304. Another set of rotating arms 303 is disposed between the side of the other end of the orbiting ring 302 and the other end of the respective rotation shaft 304. Each rotating member 305 is disposed between the two sets of rotating arms 303.

[0068] Example 3

[0069] The second embodiment is repeated, except that the Ferris wheel type electric heating device 3 further includes a ring-shaped power supply device 307. The ring-shaped power supply device 307 is arranged on the rotating arm 303 and connected to the electric heating plate 306.

[0070] Example 4

[0071] Example 3 is repeated, except that the device further includes a sintering mixture distributor 4 and a biomass solid fuel distributor 5 arranged above the sintering trolley 1. Along the running direction of the sintering trolley 1, the sintering mixture distributor 4 and the biomass solid fuel distributor 5 are arranged upstream of the ignition and holding furnace 2, and the sintering mixture distributor 4 is located upstream of the biomass solid fuel distributor 5.

[0072] Example 5

[0073] Example 4 was repeated, except that the sintered mixture distributor 4 and the biomass solid fuel distributor 5 were both nine-roller distributors.

[0074] Example 6

[0075] like Figure 5-6 As shown, Example 5 is repeated, except that this apparatus further includes a pure oxygen injection device 6 disposed to the side of 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 side wall of 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 through the side wall of the ignition and holding furnace 2 into the ignition and holding furnace 2.

[0076] Example 7

[0077] The embodiment 6 is repeated except that a plurality of pure oxygen blowing devices 6 are 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.

[0078] Example 8

[0079] Example 7 is repeated, except that the Ferris wheel type electric heating device 3 further includes a revolution motor and a rotation motor. The revolution motor is connected to the revolution ring 302 and drives the revolution ring 302 to rotate. The rotation motor is connected to the rotation body 305 and drives the rotation body 305 to rotate.

[0080] Example 9

[0081] The embodiment 8 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. The ignition section 201 and the holding section 202 are both provided with a Ferris wheel type electric heating device 3.

[0082] Example 10

[0083] Example 9 is repeated, except that the group of rotating arms 303 of the Ferris wheel type electric heating device 3 includes 8 rotating arms 303 , and the 8 rotating arms 303 are evenly distributed along the circumferential direction of the revolving ring 302 .

[0084] Example 11

[0085] Example 9 is repeated, except that the group of rotating arms 303 of the Ferris wheel type electric heating device 3 includes 7 rotating arms 303 , and the 7 rotating arms 303 are evenly distributed along the circumferential direction of the revolving ring 302 .

[0086] Example 12

[0087] Repeat Example 10, except that each rotating body 305 is provided with a plurality of electric heating plates 306, and the plurality of electric heating plates 306 are evenly arranged along the length direction of the rotating body 305, as shown in FIG. Figure 7 shown.

[0088] Example 13

[0089] Repeat Example 10, except that each rotating body 305 is provided with a plurality of electric heating plates 306, and the plurality of electric heating plates 306 are evenly arranged along the length direction of the rotating body 305 and symmetrically distributed on the cross section of the rotating body 305, as shown in FIG. Figure 8 shown.

[0090] Example 14

[0091] Repeat Example 11, except that each rotating body 305 is provided with a plurality of electric heating plates 306, and the plurality of electric heating plates 306 are evenly arranged along the length direction of the rotating body 305, and are evenly distributed along the circumferential direction on the cross section of the rotating body 305, as shown in FIG. Figure 9 shown.

[0092] Example 15

[0093] Repeat Example 11, except that each rotating body 305 is provided with a plurality of electric heating plates 306, and the plurality of electric heating plates 306 are evenly arranged along the length direction of the rotating body 305 and are distributed in a circular shape on the cross section of the rotating body 305, as shown in FIG. Figure 10 shown.

[0094] In this embodiment, the working principle of the Ferris wheel type iron ore sintering zero carbon ignition and insulation device is as follows: first, the sintering mixture is evenly arranged on the sintering trolley 1 using the sintering mixture distributor 4. After the distribution is completed, the solid fuel made of biomass is sprayed onto 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 Ferris wheel 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.

[0095] Specifically, during the ignition process of the Ferris wheel type electric heating device 3, the revolving ring 302 drives the rotating arm 303 to rotate around the revolving axis 301 in the vertical plane above the sintering trolley 1. During the rotation process, the electric heating plates 306 located on each rotating body 305 respectively provide a high-temperature atmosphere for the sintering material surface for electric ignition; at the same time, the electric heating plates 306 on each rotating body 305 rotate 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 plates 306, that is, the revolving ring 302 and the rotating body 305 respectively drive the electric heating plates 306 to revolve 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 Ferris wheel type iron ore sintering zero-carbon ignition and heat preservation device, comprising a sintering trolley (1), an ignition and heat preservation furnace (2), and a Ferris wheel type electric heating device (3); the ignition and heat preservation furnace (2) is arranged above the sintering trolley (1) upstream of a sintering machine; the Ferris wheel type electric heating device (3) comprises a revolution shaft (301), a revolution ring (302), a rotating arm (303), a rotation shaft (304), a rotation body (305), and an electric heating plate (306); wherein, The revolution axis (301) is arranged on the top of the ignition and heat preservation furnace (2); the revolution ring (302) is coaxially installed with the revolution axis (301); the revolution ring (302) is connected to a plurality of rotation arms (303), and the plurality of rotation arms (303) are evenly distributed along the circumferential direction of the revolution ring (302); each rotation arm (303) is connected to a rotation axis (304) at one end away from the revolution ring (302); each rotation axis (304) A rotating body (305) is coaxially mounted on each rotation axis (304) and is arranged parallel to the revolution axis (301); each rotation body (305) is provided with an electric heating plate (306); the revolution ring (302) drives the rotating arm (303) to rotate around the revolution axis (301) in a vertical plane above the sintering trolley (1); and the electric heating plate (306) rotates around the rotation axis (304) along with the rotation body (305).

2. The ignition and heat preservation device according to claim 1, characterized in that: The plurality of rotating arms (303) connected to the revolving ring (302) constitute a group of rotating arms (303), wherein one end of each rotating arm (303) is connected to the side of one end of the revolving ring (302), and the other end is connected to one end of the rotation shaft (304).

3. The ignition and heat preservation device according to claim 2, characterized in that: Another set of rotating arms (303) is correspondingly arranged between the side portion of the other end of the revolving ring (302) and the other end of each rotating shaft (304), and each rotating body (305) is correspondingly arranged between the two sets of rotating arms (303).

4. The ignition and heat preservation device according to any one of claims 1 to 3, characterized in that: The Ferris wheel type electric heating device (3) further comprises a ring-shaped power supply device (307); the ring-shaped power supply device (307) is arranged on the rotating arm (303) and connected to the electric heating plate (306).

5. The ignition and heat preservation device according to any one of claims 1 to 3, characterized in that: The device further comprises a sintering mixture distributor (4) and a biomass solid fuel distributor (5) arranged above the sintering trolley (1); along the running direction of the sintering trolley (1), the sintering mixture distributor (4) and the biomass solid fuel distributor (5) are arranged upstream of the ignition and holding furnace (2), and the sintering mixture distributor (4) is located upstream of the biomass solid fuel distributor (5).

6. The ignition and heat preservation device according to claim 4, characterized in that: The device further comprises a sintering mixture distributor (4) and a biomass solid fuel distributor (5) arranged above the sintering trolley (1); along the running direction of the sintering trolley (1), the sintering mixture distributor (4) and the biomass solid fuel distributor (5) are arranged upstream of the ignition and holding furnace (2), and the sintering mixture distributor (4) is located upstream of the biomass solid fuel distributor (5).

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

8. The 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 ignition and heat preservation device according to any one of claims 1-3 and 6-8, characterized in that: The device further comprises a pure oxygen blowing device (6) arranged on the side of the ignition and heat-holding 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 side wall of the ignition and heat-holding 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-holding furnace (2) and extends into the ignition and heat-holding furnace (2).

10. The 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 side of the ignition and heat-holding 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 side wall of the ignition and heat-holding 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-holding furnace (2) and extends into the ignition and heat-holding furnace (2).

11. The ignition and heat preservation device according to claim 5, characterized in that: The device further comprises a pure oxygen blowing device (6) arranged on the side of the ignition and heat-holding 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 side wall of the ignition and heat-holding 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-holding furnace (2) and extends into the ignition and heat-holding furnace (2).

12. The ignition and heat preservation device according to claim 9, characterized in that: A plurality of pure oxygen blowing devices (6) are provided on both sides of 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).

13. The ignition and heat preservation device according to claim 10 or 11, characterized in that: A plurality of pure oxygen blowing devices (6) are provided on both sides of 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 ignition and heat preservation device according to any one of claims 1-3, 6-8, and 10-12, characterized in that: The Ferris wheel type electric heating device (3) further comprises a revolution motor and a rotation motor; wherein the revolution motor is connected to the revolution ring (302) and drives the revolution ring (302) to rotate; and the rotation motor is connected to the rotation body (305) and drives the rotation body (305) to rotate.

15. The ignition and heat preservation device according to claim 4, characterized in that: The Ferris wheel type electric heating device (3) further comprises a revolution motor and a rotation motor; wherein the revolution motor is connected to the revolution ring (302) and drives the revolution ring (302) to rotate; and the rotation motor is connected to the rotation body (305) and drives the rotation body (305) to rotate.

16. The ignition and heat preservation device according to claim 5, characterized in that: The Ferris wheel type electric heating device (3) further comprises a revolution motor and a rotation motor; wherein the revolution motor is connected to the revolution ring (302) and drives the revolution ring (302) to rotate; and the rotation motor is connected to the rotation body (305) and drives the rotation body (305) to rotate.

17. The ignition and heat preservation device according to any one of claims 1-3, 6-8, 10-12, 15-16, characterized in that: Each rotating body (305) is provided with a plurality of electric heating plates (306); the plurality of electric heating plates (306) are evenly distributed on the corresponding rotating body (305) along the length direction and / or circumferential direction of the rotating body (305).

18. The ignition and heat preservation device according to claim 4, characterized in that: Each rotating body (305) is provided with a plurality of electric heating plates (306); the plurality of electric heating plates (306) are evenly distributed on the corresponding rotating body (305) along the length direction and / or circumferential direction of the rotating body (305).

19. The ignition and heat preservation device according to claim 5, characterized in that: Each rotating body (305) is provided with a plurality of electric heating plates (306); the plurality of electric heating plates (306) are evenly distributed on the corresponding rotating body (305) along the length direction and / or circumferential direction of the rotating body (305).

20. The ignition and heat preservation device according to any one of claims 1-3, 6-8, 10-12, 15-16, 18-19, characterized in that: Along the running direction of the sintering trolley (1), the ignition and heat-insulating furnace (2) is divided into an ignition section (201) and a heat-insulating section (202); the ignition section (201) and the heat-insulating section (202) are both provided with a Ferris wheel-type electric heating device (3).

21. The ignition and heat preservation device according to claim 4, characterized in that: Along the running direction of the sintering trolley (1), the ignition and heat-insulating furnace (2) is divided into an ignition section (201) and a heat-insulating section (202); the ignition section (201) and the heat-insulating section (202) are both provided with a Ferris wheel-type electric heating device (3).

22. The ignition and heat preservation device according to claim 5, characterized in that: Along the running direction of the sintering trolley (1), the ignition and heat-insulating furnace (2) is divided into an ignition section (201) and a heat-insulating section (202); the ignition section (201) and the heat-insulating section (202) are both provided with a Ferris wheel-type electric heating device (3).

23. The ignition and heat preservation device according to claim 2, characterized in that: A group of rotating arms (303) of the Ferris wheel type electric heating device (3) includes 2 to 20 rotating arms (303).

24. The ignition and heat preservation device according to claim 23, characterized in that: A group of rotating arms (303) of the Ferris wheel type electric heating device (3) includes 4 to 12 rotating arms (303).

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